Wet flue gas emission chimney inner cylinder drainage device
By installing a water collection ring and drainage pipe in the inner cylinder of the wet flue gas, the problem of "chimney rain" caused by wet flue gas condensate is solved, achieving effective water collection and drainage, and reducing equipment corrosion and environmental pollution.
Patent Information
- Application Number
- CN202520496659.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-20
AI Technical Summary
In the pulp and paper industry, the "chimney rain" formed by the condensation of wet flue gas during its discharge from the inner cylinder causes corrosion and pollution to equipment and the environment, which is difficult to effectively solve with existing technologies.
Design an inner cylinder drainage device, including multiple water collecting ring discs and drainage pipes. The water collecting ring discs collect condensate from the inner wall of the inner cylinder, and the drainage pipes guide the condensate to the bottom of the inner cylinder, preventing the condensate from being carried out of the inner cylinder.
It effectively collects and drains condensate from wet flue gas, reduces the amount of moisture carried out of the inner cylinder, avoids the formation of "chimney rain," and reduces equipment corrosion and environmental pollution.
Smart Images
Figure CN223882782U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a chimney drainage device, especially an inner cylinder drainage device for wet flue gas obtained by using chlorine dioxide denitration etc. BACKGROUND
[0002] In the pulp and paper industry, the alkali furnace and lime kiln are core production equipment. The flue gas generated during the operation of these devices contains a high concentration of nitrogen oxides, which exceeds the environmental protection standard. Therefore, the flue gas must be treated by denitration. The conventional chlorine dioxide denitration method is to spray chlorine dioxide into the denitration tower before the flue gas is discharged. The nitrogen oxides are effectively converted into nitrate, and then discharged through the inner cylinder of the chimney. However, from the actual implementation, it can be seen that the denitration process introduces moisture. The wet flue gas (wet flue gas) will cause condensation on the inner wall of the inner cylinder during the discharge process. When it is discharged to the top of the inner cylinder, it will meet the external cold air and cause condensation, forming "chimney rain". This "chimney rain" can cause corrosion to the surrounding equipment and pollution to the surrounding environment, which needs to be solved. SUMMARY
[0003] The purpose of the utility model is to provide a wet flue gas discharge chimney inner cylinder drainage device, which can effectively collect and drain the condensate water generated during the discharge of wet flue gas through the inner cylinder to the bottom of the inner cylinder, avoiding the formation of "chimney rain".
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A wet flue gas discharge chimney inner cylinder drainage device, comprising a plurality of water collecting ring type discs arranged in an upper and lower interval on the inner wall of the inner cylinder of the wet flue gas chimney, and a water draining pipe connected between two adjacent water collecting ring type discs, a water retaining structure is provided at the top of the inner cylinder, the water draining pipe arranged on the uppermost water collecting ring type disc extends upward and is connected to a cylinder top water collecting groove formed between the water retaining structure and the outer wall of the inner cylinder through an opening provided at the top of the inner cylinder, and the cylinder top water collecting groove is open upward and communicates with the outside.
[0006] The utility model has the advantages of:
[0007] The utility model can effectively collect and drain the condensate water generated during the discharge of wet flue gas through the inner cylinder and the condensate water generated when the wet flue gas meets the external cold air at the top of the inner cylinder, and discharge it to the bottom of the inner cylinder. The moisture carried out of the inner cylinder is greatly reduced, thereby avoiding the formation of "chimney rain" and greatly reducing the corrosion to the surrounding equipment and the pollution to the surrounding environment. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 is the structure partial view of the water drainage device of the wet flue gas emission chimney inner tube of the utility model.
[0009] Figure 2 is Figure 1 A-A section view enlarged schematic view.
[0010] Figure 3 is Figure 2 B-B section view partial enlarged schematic view.
[0011] Figure 4 is Figure 1 C part enlarged schematic view.
[0012] Figure 5 is the water drainage pipe schematic view of the inner tube expansion joint connecting position. DETAILED DESCRIPTION
[0013] As Figures 1 to 5 the utility model discloses a kind of wet flue gas emission chimney inner tube water drainage device, for the inner tube 20 of wet flue gas chimney, it includes fixed in the inner wall of wet flue gas chimney's inner tube 20, a plurality of water collecting ring type disc is arranged at intervals from top to bottom, two water collecting ring type discs adjacent from top to bottom are connected by water drainage pipe 31, the inner tube 20 top is equipped with water retaining structure 34, the water drainage pipe 31 on the uppermost water collecting ring type disc is extended upwards and is connected with the cylinder top water collecting groove 40 formed between water retaining structure 34 and the outer wall of inner tube 20 via the aperture 21 opened at the top of inner tube 20, the cylinder top water collecting groove 40 is open upward, and communicated with outside.
[0014] In pulp and paper industry, wet flue gas chimney includes outer tube 10, one or more inner tubes 20 are arranged in outer tube 10, Figure 1 It is shown that one inner tube 20 is arranged in outer tube 10. Generally, outer tube 10 is made of stainless steel or glass fiber reinforced plastic, and inner tube 20 is made of titanium composite plate.
[0015] In practical application, one water collecting ring type disc is arranged at intervals from top to bottom 15m in inner tube 20, and the design of multi-layer water collecting ring type disc can effectively improve water collection efficiency. Further, referring to Figures 1 to 3 , it can be understood that the water collecting ring type disc includes at least two water collecting boxes 32, and water collecting ring 33 is connected between two adjacent water collecting boxes 32;Water drainage pipe 31 is arranged between two water collecting boxes 32 adjacent from top to bottom, and the top pipe opening of water drainage pipe 31 is connected with the bottom opening of the upper water collecting box 32, and the bottom pipe opening is opposite to the top opening of the lower water collecting box 32.
[0016] Further, each water collecting box 32 of each water collecting ring type disc is uniformly distributed along the circumferential direction of inner tube 20, Figure 2The illustration shows a water collection ring design with two water collection boxes 32. Each water collection box 32 on each water collection ring is arranged vertically opposite to each water collection box 32 on the adjacent water collection rings. Correspondingly, the drain pipe 31 is vertically arranged and fixed to the inner wall of the inner cylinder 20 by the fastener 35.
[0017] like Figure 3 The water collection box 32 is fixed to the inner wall of the inner cylinder 20. The bottom of the plate-shaped water collection ring 33 is fixed to the inner wall of the inner cylinder 20. The water collection ring 33 is inclined to the inner wall of the inner cylinder 20 to form a water collection ring groove 50, which is connected to the water collection cavity of the water collection box 32. Preferably, as follows... Figure 3 The water collection box 32 is smaller at the top and larger at the bottom, and is shaped like a frustum, so it is not limited by any constraints.
[0018] like Figure 3 The upper part of the water collecting ring 33 is provided with multiple elongated slits 330, which are inclined relative to the upper and lower edges of the water collecting ring 33. For example, the elongated slits 330 are parallel, and the inclination angle of the elongated slits 330 is designed to be 60°. The function of the elongated slits 330 is to collect the condensate generated by the rising wet flue gas encountering the inner wall of the inner cylinder 20 while the water collecting ring 33 does not hinder the smooth upward flow and discharge of the wet flue gas.
[0019] Typically, the bottom opening of the water collection box 32 of the bottom water collection ring plate is connected to a drain pipe 31, and the bottom opening of the drain pipe 31 extends to the bottom of the inner cylinder 20.
[0020] like Figure 4 The water-blocking structure 34 includes a ring of water-blocking plates 341 fixed on the top outer wall of the inner cylinder 20. The bottom of the water-blocking plate 341 is fixed to the outer wall of the inner cylinder 20. The water-collecting groove 40 formed between the water-blocking plate 341 and the outer wall of the inner cylinder 20 is connected to the opening 21. The drain pipe 31 at the top inside the inner cylinder 20 is connected to the opening 21 via the elbow pipe 310.
[0021] In actual design, the shape of the baffle 341 is not limited and can be varied. Figure 4 The cross-section of the water baffle 341 shown is obtuse-angled.
[0022] Furthermore, such as Figure 4 The top of the baffle plate 341 extends upward beyond the top of the inner cylinder 20, and the top of the baffle plate 341 is connected to the top of the inner cylinder 20 through a connector 342. There are multiple connectors 342, which are spaced apart to facilitate the connection between the water collection trough 40 at the top of the cylinder and the outside, thereby increasing the stability of the baffle plate 341 and improving the efficiency of condensate collection. Figure 4 The connector 342 shown is a C-shaped connector, but it can also be designed with other cross-sectional shapes, without limitation.
[0023] like Figure 5The drain pipe 31 at the expansion joint connecting position of the inner cylinder 20 is formed by an upper and lower inserted thin pipe 311 and thick pipe 312 to avoid damage of the drain pipe 31 caused by expansion of the inner cylinder 20.
[0024] In actual design, the water collecting box 32, water collecting ring 33 and drain pipe 31 should be made of high temperature resistant and corrosion resistant alloy steel.
[0025] In use, the wet flue gas generated after denitration treatment is raised from the bottom of the inner cylinder 20 (as shown by the solid arrow), in the process of rising, the wet flue gas meets the inner wall of the inner cylinder 20 to form condensed water, and then the condensed water flows along the inner wall of the inner cylinder 20 to the water collecting ring groove 50 formed by the water collecting ring 33 and the inner wall of the inner cylinder 20, and then flows into the water collecting cavity of the water collecting box 32, and then flows into the drain pipe 31 connected below the water collecting box 32, so that the water is drained downward from the water collecting box 32 of each water collecting ring type disc to the bottom of the inner cylinder 20. Figure 1 In use, the wet flue gas generated after denitration treatment is raised from the bottom of the inner cylinder 20 (as shown by the solid arrow), in the process of rising, the wet flue gas meets the inner wall of the inner cylinder 20 to form condensed water, and then the condensed water flows along the inner wall of the inner cylinder 20 to the water collecting ring groove 50 formed by the water collecting ring 33 and the inner wall of the inner cylinder 20, and then flows into the water collecting cavity of the water collecting box 32, and then flows into the drain pipe 31 connected below the water collecting box 32, so that the water is drained downward from the water collecting box 32 of each water collecting ring type disc to the bottom of the inner cylinder 20. Figure 4 In use, the wet flue gas generated after denitration treatment is raised from the bottom of the inner cylinder 20 (as shown by the solid arrow), in the process of rising, the wet flue gas meets the inner wall of the inner cylinder 20 to form condensed water, and then the condensed water flows along the inner wall of the inner cylinder 20 to the water collecting ring groove 50 formed by the water collecting ring 33 and the inner wall of the inner cylinder 20, and then flows into the water collecting cavity of the water collecting box 32, and then flows into the drain pipe 31 connected below the water collecting box 32, so that the water is drained downward from the water collecting box 32 of each water collecting ring type disc to the bottom of the inner cylinder 20.
[0026] In addition, in actual implementation, the diameter of the inner cylinder 20 can be reasonably designed to effectively control the rising flow rate of the wet flue gas, so that the flow rate is not more than 16 m / s, so that the wet flue gas is better prevented from being atomized under high-speed flow, and the formation of "chimney rain" is effectively avoided.
[0027] The utility model has the advantages of:
[0028] The utility model discloses a design of wet flue gas obtained by using chlorine dioxide denitration and other wet denitration treatment of alkali furnace and lime kiln of pulp and paper industry, which can effectively collect and dredge the condensate water produced by the wet flue gas in the process of rising through the inner cylinder due to the inner wall of the inner cylinder and the condensate water produced by the wet flue gas when being discharged to the top of the inner cylinder and encountering the external cold air, and discharge the condensate water to the bottom of the inner cylinder, so that the water taken out of the outer part of the inner cylinder is greatly reduced, and thus the formation of "chimney rain" is avoided, and the corrosion caused to the surrounding equipment and the pollution caused to the surrounding environment are greatly reduced.
[0029] The above is the preferred embodiment of the utility model and the technical principle used, and for those skilled in the art, any equivalent transformation, simple replacement and other obvious changes based on the technical scheme of the utility model without departing from the spirit and scope of the utility model belong to the protection scope of the utility model.
Claims
1. A drainage device for the inner liner of a wet flue gas emission chimney, characterized in that, The device includes an inner cylinder fixed to the inner wall of a wet flue gas chimney, multiple water collecting ring discs spaced vertically, two adjacent water collecting ring discs connected by a drain pipe, a water-blocking structure at the top of the inner cylinder, and a drain pipe on the uppermost water collecting ring disc extending upwards and connected to a water collecting trough formed between the water-blocking structure and the outer wall of the inner cylinder through an opening at the top of the inner cylinder. The water collecting trough at the top of the cylinder is open upwards and communicates with the outside.
2. The wet flue gas emission chimney inner liner drainage device as described in claim 1, characterized in that, The water collection ring includes at least two water collection boxes, and a water collection ring is connected between two adjacent water collection boxes; a drainage pipe is provided between two adjacent water collection boxes, and the top opening of the drainage pipe is connected to the bottom opening of the upper water collection box, while the bottom opening is opposite to the top opening of the lower water collection box.
3. The wet flue gas emission chimney inner liner drainage device as described in claim 2, characterized in that, Each of the water collection boxes on each of the water collection annular discs is evenly distributed along the circumference of the inner cylinder. Each water collection box on each of the water collection annular discs is arranged vertically opposite to each water collection box on the adjacent water collection annular discs. The drainage pipe is vertically arranged and fixed to the inner wall of the inner cylinder by a fixing member.
4. The wet flue gas emission chimney inner liner drainage device as described in claim 2, characterized in that, The water collection box is fixed to the inner wall of the inner cylinder, and the bottom of the plate-shaped water collection ring is fixed to the inner wall of the inner cylinder. The water collection ring is inclined to the inner wall of the inner cylinder to form a water collection ring groove, and the water collection ring groove is connected to the water collection cavity of the water collection box.
5. The wet flue gas emission chimney inner liner drainage device as described in claim 4, characterized in that, The upper part of the water collection ring is provided with multiple elongated slits, which are inclined relative to the upper and lower edges of the water collection ring.
6. The wet flue gas emission chimney inner liner drainage device as described in claim 2, characterized in that, The bottom opening of the water collection box of the bottom water collection ring plate is connected to a drain pipe, and the bottom opening of the drain pipe extends to the bottom of the inner cylinder.
7. The wet flue gas emission chimney inner liner drainage device as described in claim 1, characterized in that, The water-blocking structure includes a ring of water-blocking plates fixed to the outer wall of the top of the inner cylinder. The bottom of the water-blocking plates is fixed to the outer wall of the inner cylinder. The water collection groove formed between the water-blocking plates and the outer wall of the inner cylinder is connected to the opening. The drain pipe at the top of the inner cylinder is connected to the opening via an elbow pipe.
8. The wet flue gas emission chimney inner liner drainage device as described in claim 7, characterized in that, The top of the baffle plate extends upward beyond the top of the inner cylinder, and the top of the baffle plate is connected to the top of the inner cylinder via a connector, wherein: there are multiple connectors arranged at intervals.
9. The wet flue gas emission chimney inner liner drainage device as described in claim 1, characterized in that, The drain pipe located at the expansion joint connection position of the inner cylinder is formed by a thin tube and a thick tube inserted vertically.