Flue gas treatment tower and flue gas treatment equipment

Abstract

The utility model provides a flue gas treatment tower and flue gas treatment equipment, and the flue gas treatment tower comprises a tower body and a spraying part, a gas inlet is formed in the bottom of the tower body, and a gas outlet is formed in the top; a packing layer, a spraying layer and a demisting layer are sequentially arranged above the gas inlet in the tower body; the spraying part comprises at least three groups of spraying assemblies arranged on the spraying layer; the spraying assembly comprises a liquid conveying pipe, a branch pipe and a spraying nozzle; the liquid conveying pipes of every two spraying assemblies are arranged at a deviation angle. At least three groups of spraying assemblies are arranged, and the deviation angle between every two liquid conveying pipes is 15-45 degrees, so that a staggered covering atomization area is formed, the situation that spraying tracks of the adjacent spraying assemblies are overlapped or spaced is avoided, it is ensured that flue gas makes full contact with spraying water liquid, spraying dead angles are eliminated, and the purification efficiency is improved; meanwhile, the spraying nozzles symmetrically arranged on the two sides of the branch pipe can disperse liquid pressure, and scale formation or sediment formation on the surface of the packing layer is reduced in combination with the asymmetric scouring effect caused by the deviation angle.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas treatment, and particularly relates to a flue gas treatment tower and a flue gas treatment equipment. BACKGROUND

[0002] With the increasingly stringent environmental protection requirements, the industrial flue gas treatment equipment needs to have higher desulfurization and dust removal efficiency. The traditional flue gas treatment tower usually adopts a single layer or multiple layers of linearly arranged spray components to realize purification through the contact between the spray liquid and the flue gas.

[0003] The Chinese utility model patent with the publication number CN202876577U discloses a flue gas purification tower, which is provided with a combined structure of dust removal grid packing and defoaming units in the tower body. The dust removal grid packing is composed of rows of inclined strip plates. The adjacent rows of strip plates are opposite in the direction of inclination and are cross-displaced, forming a three-dimensional grid channel. The collision between the dust and the packing is strengthened, and the contact time between the flue gas and the cooling and dust removal liquid is prolonged, thereby improving the dust removal efficiency.

[0004] The arrangement of the strip plates of the dust removal grid packing in the above-mentioned flue gas purification tower can enhance the collision, but may cause the increase of the air flow resistance, and the packing layer needs to be disassembled during cleaning and maintenance. However, the layout of the spray layer is usually in the parallel or symmetrical arrangement, which causes the repetition or gap in the spray coverage area, and it is difficult to form uniform atomization coverage. The coverage blind area is easily generated between the adjacent components, and part of the flue gas may not be fully contacted with the spray liquid before entering the subsequent processing link, thereby affecting the purification effect. UTILITY MODEL CONTENT

[0005] Therefore, in order to solve the problems of uneven spray coverage and high maintenance cost in the prior art, the utility model provides a flue gas treatment tower and a flue gas treatment equipment, and the specific technical scheme is as follows:

[0006] On the one hand, a flue gas treatment tower comprises a tower body and a spray component. The tower body is provided with an air inlet at the bottom and an air outlet at the top. A packing layer, a spray layer and a demisting layer are sequentially arranged above the air inlet in the tower body. The spray component comprises at least three groups of spray assemblies arranged in the spray layer. Each spray assembly comprises a liquid supply pipe, a branch pipe arranged perpendicularly to the liquid supply pipe, and spray nozzles arranged on both sides of the branch pipe. The liquid supply pipes of the two spray assemblies are arranged at an offset angle, and the offset angle ranges from 15° to 45°.

[0007] The flue gas treatment tower is characterized in that: at least three groups of spraying assemblies are arranged, and the offset angle between two liquid delivery pipes is 15-45 degrees, so that the spraying areas are staggered and covered, the spraying tracks of adjacent spraying assemblies are avoided from overlapping or having a gap, the flue gas is ensured to be fully contacted with the spraying liquid, the spraying dead angle is eliminated, the purification efficiency is improved, the desulfurization and dust removal efficiency is significantly improved, and the continuous operation period of the equipment is prolonged.

[0008] Further, the offset angle is 20 degrees.

[0009] Further, at least a first branch pipe, a second branch pipe and a third branch pipe are arranged on the liquid delivery pipe; and the diameters of the first branch pipe, the second branch pipe and the third branch pipe are sequentially reduced.

[0010] Further, a drawer type filter grid is arranged below the filler layer.

[0011] Further, a liquid discharge slope and a liquid discharge port matched with the lowest part of the liquid discharge slope are arranged at the bottom end of the tower body.

[0012] Further, the demisting layer is provided with a plurality of cyclone demisters.

[0013] In another aspect, a flue gas treatment device includes a flue gas absorption device and a flue gas treatment tower; the flue gas absorption device includes a ventilation pipeline and a spraying part, the spraying part includes a spraying box and a spraying assembly arranged in the spraying box, and the spraying box is provided with a spraying space communicated with the ventilation pipeline; the ventilation pipeline is used for ventilating flue gas into the spraying space; and the spraying space is provided with a ventilation outlet communicated with the gas inlet.

[0014] Further, the spraying assembly includes a first spraying group and a second spraying group which are sequentially communicated; the spraying box includes a first spraying barrel, a second spraying barrel and a connecting pipeline connecting the first spraying barrel and the second spraying barrel; the first spraying group includes a first cyclone unit arranged in the first spraying barrel and a first spraying unit arranged above the first cyclone unit; and the second spraying group includes a second cyclone unit arranged in the second spraying barrel and a second spraying unit arranged above the second cyclone unit.

[0015] Further, the spraying space has an overall N-shaped structure, flue gas is ventilated from the middle part of the first spraying barrel, sequentially passes through the first cyclone unit, the first spraying unit, the connecting pipeline, the bottom part of the second spraying barrel, the second cyclone unit and the second spraying unit.

[0016] Further, the flue gas absorption device further comprises a collecting component, a bottom of the first spraying barrel is provided with a first outlet, and a bottom of the second spraying barrel is provided with a second outlet; the collecting component comprises a first collecting groove arranged at the bottom of the first spraying barrel and a second collecting groove arranged at the bottom of the second spraying barrel. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present utility model can be further understood from the following description in conjunction with the drawings. The components in the drawings are not necessarily drawn to scale, but the emphasis is placed on showing the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0018] Figure 1 is a structural schematic of the flue gas treatment tower according to an embodiment of the present utility model Figure 1 ;

[0019] Figure 2 is a structural schematic of the flue gas treatment tower according to an embodiment of the present utility model Figure 2 ;

[0020] Figure 3 is a structural schematic of the spraying assembly according to an embodiment of the present utility model

[0021] Figure 4 is a structural schematic of the flue gas treatment equipment according to an embodiment of the present utility model

[0022] Figure 5 is a structural sectional view of the flue gas absorption device according to an embodiment of the present utility model

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, tower body; 2, spraying component; 3, flue gas absorption device; 4, flue gas treatment tower; 5, air duct; 6, spraying component; 7, collecting component;

[0025] 101, gas inlet; 102, gas outlet; 103, filler layer; 104, spraying layer; 105, demisting layer; 106, liquid discharge slope; 107, liquid discharge port;

[0026] 21, spraying assembly; 22, liquid conveying pipe; 23, branch pipe; 24, spraying nozzle;

[0027] 231, first branch pipe; 232, second branch pipe; 233, third branch pipe;

[0028] 61, spraying box; 62, spraying assembly; 63, first spraying group; 64, second spraying group;

[0029] 611, first spraying barrel; 612, second spraying barrel; 613, connecting pipe;

[0030] 631、first cyclone unit; 632、first spraying unit;

[0031] 641、second cyclone unit; 642、second spraying unit;

[0032] 71、first collection groove; 72、second collection groove. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0034] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. As used herein the terms "vertical", "horizontal", "left", "right", and the like are used for explanation only and are not intended to limit the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] The "first", "second" in the present application do not represent the specific number and order, but only for the name of the distinction.

[0037] On the one hand, as Figure 1 and Figure 2 、 Figure 3 As shown in the present application, a flue gas treatment tower, comprising a tower body 1 and a spraying component 2; the tower body 1 is provided with an air inlet 101 at the bottom and an air outlet 102 at the top; the tower body 1 is provided with a filler layer 103, a spraying layer 104 and a demisting layer 105 in sequence above the air inlet; the spraying component 2 comprises at least three groups of spraying assemblies 21 arranged in the spraying layer 104; the spraying assembly 21 comprises a liquid delivery pipe 22, a branch pipe 23 arranged perpendicularly to the liquid delivery pipe 22, and spraying nozzles 24 arranged on both sides of the branch pipe 23; the liquid delivery pipes 22 of the spraying assemblies 21 are arranged at an offset angle, and the offset angle ranges from 15° to 45°.

[0038] The flue gas treatment tower, by setting at least three groups of spraying components, and the offset angle between two liquid delivery pipes 22 is 15°-45°, forming staggered coverage atomization area, avoiding the overlapping or gap of adjacent spraying component 21 jet trajectory, ensuring the flue gas and spraying water fully contact, eliminating the spraying dead angle, improving the purification efficiency, significantly improving the desulfurization and dust removal efficiency; at the same time, the spraying nozzles 24 symmetrically arranged on both sides of the branch pipe 23 can disperse the liquid pressure, combined with the asymmetric washing effect caused by the offset angle, reduce the formation of scale or sediment on the surface of the filler layer 103, prolong the continuous operation cycle of the equipment.

[0039] In one embodiment, the offset angle is 20°. In this way, by limiting the offset angle between the spraying components to 20°, the mixing efficiency of the gas flow and the liquid droplets is further optimized while maximizing the spraying coverage density; compared with a smaller angle (such as 15°), the 20° offset angle can reduce the edge overlap of adjacent spraying areas, reducing liquid waste; compared with a larger angle (such as 45°), the layout of the offset angle is more compact, avoiding the problem of spraying blind area expansion caused by too large angle.

[0040] In one embodiment, the liquid delivery pipe 22 is provided with at least a first branch pipe 231, a second branch pipe 232 and a third branch pipe 233; the diameters of the first branch pipe 231, the second branch pipe 232 and the third branch pipe 233 decrease in turn. In this way, the gradient pipe diameter design adapts to the liquid pressure distribution law, the first branch pipe near the inlet of the liquid delivery pipe can bear higher flow, avoiding uneven liquid injection caused by too high pressure at the inlet end; the decreasing pipe diameter of the subsequent branch pipes maintains stable spraying pressure at the end, ensuring consistent atomization effect of the spraying nozzles.

[0041] In one embodiment, a drawer type filter grid is arranged below the filler layer 103. In this way, by adding a drawer type filter grid below the filler layer, pre-interception and convenient cleaning of large particle impurities are realized; the filter grid can be pulled out for cleaning or replacement without stopping the machine to disassemble the filler layer, prolonging the continuous operation time of the equipment.

[0042] In one embodiment, the bottom end of the tower body 1 is provided with a drainage slope 106 and a drainage port 107 adapted to the lowest part of the drainage slope. In this way, gravity flow is used to realize rapid collection and discharge of waste liquid, avoiding corrosion or secondary volatile pollution of the tower body caused by liquid accumulation, improving the waste liquid discharge efficiency, and simplifying the bottom cleaning process.

[0043] In one embodiment, the demisting layer 105 is provided with a plurality of cyclone demisters. In this way, the cyclone demister is used instead of the traditional baffle or mesh demister, which separates the small liquid droplets by centrifugal force, improving the demisting efficiency; at the same time, the cyclone structure is not easy to block, reducing the flushing frequency of the demisting layer, reducing the operating energy consumption.

[0044] In another aspect, as Figure 4 and Figure 5 The utility model discloses an embodiment of a kind of flue gas treatment equipment, including flue gas absorption device 3 and flue gas treatment tower 4;The flue gas absorption device 3 includes air pipe 5 and spraying part 6, the spraying part 6 includes spraying box 61 and the spraying assembly 62 being arranged in spraying box 61, spraying space is equipped in the spraying box 61 with The air pipe 5 is communicated;The air pipe 5 is used to be communicated into the flue gas in the spraying space;Spraying space is equipped with the air outlet that is communicated with the gas inlet 101.Due to in aluminum processing (such as smelting, anodic oxidation) and aluminum spraying industry, waste gas composition is complex, often contain fluoride (HF), particulate matter (alumina dust), VOCs (benzene series, ester), acid gas (HCl, H □ SO4 fog) and heavy metal (such as lead, chromium in coating).Through the combination of flue gas absorption device 3 and flue gas treatment tower 4, by pre-spraying space to the flue gas pretreatment (such as cooling, rough dust removal), reduce the load of tower body 1 spray layer 104, multistage absorption process can realize pollution grading removal and resource recycling, to reach the environmental protection requirement of flue gas emission.

[0045] In one embodiment, the spraying assembly 62 includes first spraying group 63 and second spraying group 64 communicated in sequence;The spraying box 61 includes first spraying barrel 611, second spraying barrel 612 and connecting pipe 613 connecting first spraying barrel 611 and second spraying barrel 612;The first spraying group 63 includes first cyclone unit 631 arranged in the first spraying barrel 611 and first spraying unit 632 arranged above the first cyclone unit 631;The second spraying group 64 includes second cyclone unit 641 arranged in the second spraying barrel 612 and second spraying unit 642 arranged above the second cyclone unit 641.In this way, the segmented processing (cyclone unit + spraying unit) of the first spraying group 63 and the second spraying group 64 forms a double-stage purification of "rough processing-precise processing";At the same time, the cyclone unit preferentially removes large particles of dust, and the spraying unit targets fine contaminants, with clear division of labor, avoiding overload of a single processing unit and improving the stability of the spraying assembly 62.

[0046] In one of the embodiments, the spraying space is in an N-shaped structure as a whole, the flue gas enters from the middle of the first spraying barrel 611, sequentially passes through the first cyclone unit 631, the first spraying unit 632, the connecting pipeline 613, the bottom of the second spraying barrel 612, the second cyclone unit 641 and the second spraying unit 642. In this way, the flow channel in the N-shaped structure prolongs the residence time of the flue gas to 5-8 seconds (3-5 seconds in the traditional structure), the gas-liquid contact is strengthened through the effect of flow deflection, and meanwhile, the compact structure reduces the equipment area; at the same time, the design that the flue gas path enters from the middle and turns back from the bottom effectively utilizes the principle of gravity sedimentation to preliminarily separate the liquid droplets and the particulate matters.

[0047] In one of the embodiments, the flue gas absorption device 3 further comprises a collecting component 7, the bottom of the first spraying barrel 611 is provided with a first outlet, and the bottom of the second spraying barrel 612 is provided with a second outlet; the collecting component 7 comprises a first collecting groove 71 arranged at the bottom of the first spraying barrel 611 and a second collecting groove 72 arranged at the bottom of the second spraying barrel 612. In this way, the first collecting groove 71 and the second collecting groove 72 respectively collect the waste liquid of the first spraying barrel 611 and the second spraying barrel 612, so that the liquid with different pollution degrees is classified and recycled. Specifically, the first collecting groove 71 mainly recycles the high-concentration dust slurry, and the second collecting groove 72 processes the low-concentration waste liquid, which is convenient for subsequent differentiated treatment or resource utilization and reduces the comprehensive treatment cost.

[0048] The technical features of the above embodiments can be combined arbitrarily, and to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the description.

[0049] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, on the premise of not departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A flue gas treatment tower characterized by, The tower body (1) and the spraying component (2) are included. The tower body (1) is provided with an air inlet (101) at the bottom and an air outlet (102) at the top. The tower body (1) is sequentially provided with a filler layer (103), a spraying layer (104) and a demisting layer (105) above the air inlet. The spraying component (2) includes at least three groups of spraying assemblies (21) arranged in the spraying layer (104). The spraying assembly (21) includes a liquid supply pipe (22), a branch pipe (23) arranged perpendicularly to the liquid supply pipe (22), and spraying nozzles (24) arranged on both sides of the branch pipe (23). The liquid supply pipes (22) of the spraying assemblies (21) are arranged at an offset angle, and the offset angle ranges from 15° to 45°.

2. A flue gas treatment tower according to claim 1, characterized in that The offset angle is 20°.

3. A flue gas treatment tower according to claim 1, characterized in that The liquid supply pipe (22) is provided with at least a first branch pipe (231), a second branch pipe (232) and a third branch pipe (233). The diameters of the first branch pipe (231), the second branch pipe (232) and the third branch pipe (233) decrease in sequence.

4. A flue gas treatment tower according to claim 1, characterized in that A drawer type filter grid is arranged below the filler layer (103).

5. A flue gas treatment tower according to claim 1, characterized in that The bottom end of the tower body (1) is provided with a liquid discharge slope (106) and a liquid discharge port (107) matching the lowest part of the liquid discharge slope.

6. A flue gas treatment tower according to claim 1, characterized in that The demisting layer (105) is provided with a plurality of cyclone demisters.

7. A flue gas treatment apparatus, characterized by The flue gas absorption device (3) and the flue gas treatment tower (4) according to any one of claims 1-6 are included. The flue gas absorption device (3) includes an air duct (5) and a spraying component (6), the spraying component (6) includes a spraying box (61) and a spraying assembly (62) arranged in the spraying box (61), and the spraying box (61) is provided with a spraying space in communication with the air duct (5). The air duct (5) is used for introducing flue gas into the spraying space. The spraying space is provided with an air outlet in communication with the air inlet (101).

8. A flue gas treatment apparatus according to claim 7, characterised in that, The spraying assembly (62) includes a first spraying group (63) and a second spraying group (64) in sequence. The spraying box (61) includes a first spraying barrel (611), a second spraying barrel (612) and a connecting pipe (613) connecting the first spraying barrel (611) and the second spraying barrel (612). The first spraying group (63) includes a first cyclone unit (631) arranged in the first spraying barrel (611) and a first spraying unit (632) arranged above the first cyclone unit (631). The second spraying group (64) includes a second cyclone unit (641) arranged in the second spraying barrel (612) and a second spraying unit (642) arranged above the second cyclone unit (641).

9. A flue gas treatment apparatus according to claim 8, characterised in that, The spraying space as a whole has an N-shaped structure, flue gas is introduced from the middle of the first spraying barrel (611), sequentially passes through the first cyclone unit (631), the first spraying unit (632), the connecting pipe (613), the bottom of the second spraying barrel (612), the second cyclone unit (641) and the second spraying unit (642).

10. A flue gas treatment apparatus according to claim 9, characterised in that, The flue gas absorption device (3) further comprises a collecting component (7), the bottom of the first spraying barrel (611) is provided with a first outlet, and the bottom of the second spraying barrel (612) is provided with a second outlet. The collecting component (7) comprises a first collecting groove (71) arranged at the bottom of the first spraying barrel (611) and a second collecting groove (72) arranged at the bottom of the second spraying barrel (612).

Images