Multi-barrel type simple chimney and inner wall anti-corrosion structure

Abstract

The utility model discloses a multi-barrel type simple chimney and an inner wall anti-corrosion structure. The multi-barrel type simple chimney comprises a concrete outer barrel, a multi-pipe type steel inner barrel, a flue, a steel inner barrel connecting platform, a short-circuit chimney, a suspension system, a shake stopping system, an expansion system, a lining anti-corrosion system and a drainage system. The concrete outer cylinder is of a concrete structure, the upper portion is a straight cylinder section, the lower portion is a conical section, and the multi-pipe type steel inner cylinder is used for supporting and stopping shaking. A short-circuit chimney is pre-buried in the steel inner cylinder connecting platform and is in flexible connection with the multi-pipe type steel inner cylinders, so that the multi-pipe type steel inner cylinders are connected in parallel. The chimney is divided into an upper part and a lower part, the upper part collects flue gas and discharges the flue gas, the lower part is connected with each unit flue and does not interfere with each other, all flue gas contact surfaces are provided with the lining anti-corrosion systems, and the anti-corrosion expansion system and the chimney middle platform are sealed. According to the utility model, the problems of mutual interference of smoke exhaust of multiple units, connection of the outer cylinder and the inner cylinder, overlarge anti-corrosion area and arrangement of the multi-cylinder steel inner cylinder are solved, the engineering quantity is low, and the device is safe, reliable and low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to a multi-cylinder simplified chimney and its inner wall anti-corrosion structure, belonging to the field of building chimney technology. Background Technology

[0002] When constructing or renovating chimneys in domestic thermal power plants, chemical plants, metallurgical plants, and other industries, the flue gas produced after wet desulfurization is wet flue gas containing acidic liquids, which is corrosive to the flue gas contact surface on the inner wall of the chimney. Therefore, the chimney design should consider the combination of chimney structure and corrosion prevention, and minimize construction costs.

[0003] Currently, when constructing new chimneys, the sleeve-type chimney is a common solution, where the outer chimney is made of concrete, and the inner chimney is made of steel or fiberglass. However, multiple units may require multiple inner chimneys. The steel inner chimney can be made of corrosion-resistant alloy material, or an anti-corrosion lining can be installed inside the inner chimney. When renovating chimneys, a new steel inner chimney is built within the existing concrete, or anti-corrosion measures are directly applied to the existing concrete inner wall. These conventional solutions have a long overall construction period, require a large anti-corrosion area, and are expensive.

[0004] Therefore, a multi-cylinder simplified chimney is proposed. This chimney can solve the problem of multiple units' smoke transmission not affecting each other. The inner wall of the chimney has anti-corrosion function, which can also reduce the anti-corrosion area, reduce the overall chimney project workload, and reduce the cost. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of mutual interference of smoke exhaust from multiple units in sleeve-type chimneys, large engineering workload and long construction period for new multi-tube inner cylinders, and large anti-corrosion area and high cost required for steel inner cylinders or original concrete inner walls. Therefore, a multi-tube simplified chimney and its inner wall anti-corrosion structure are proposed.

[0006] To achieve the above objectives, this utility model provides a multi-cylinder simplified chimney and its inner wall anti-corrosion structure, including a concrete outer cylinder. A multi-tube steel inner cylinder can be assembled inside the concrete outer cylinder via a steel inner cylinder connecting platform. The multi-tube steel inner cylinder includes at least one exhaust inner cylinder, with an open top located in the middle of the concrete outer cylinder. At least one flue is provided on the bottom side wall of the concrete outer cylinder corresponding to the exhaust inner cylinder, and the exhaust inner cylinder is connected to an external coal-fired power unit through the flue. A drainage system is connected to the bottom of the multi-tube steel inner cylinder. An anti-corrosion lining system is provided on the inner wall of the upper part of the concrete outer cylinder and on the inner wall of each exhaust inner cylinder.

[0007] Preferably, the concrete outer cylinder includes an upper exhaust duct and a lower exhaust duct. The upper exhaust duct is cylindrical, and the lower exhaust duct is conical with its diameter gradually increasing in the direction away from the upper exhaust duct. The upper exhaust duct and the lower exhaust duct are coaxially connected. The steel inner cylinder connecting platform is located at the diameter change point where the upper exhaust duct and the lower exhaust duct meet. The multi-tube steel inner cylinder is entirely located inside the lower exhaust duct. Multiple short-connecting chimneys are provided on the steel inner cylinder connecting platform corresponding to the exhaust inner cylinder inside the multi-tube steel inner cylinder. The exhaust inner cylinder and the upper exhaust duct are connected through the short-connecting chimneys.

[0008] Furthermore, the short-circuit chimney and the corresponding exhaust inner cylinder are softly connected via an expansion system.

[0009] Furthermore, both ends of the short-connected chimney and the exhaust inner cylinder that are connected to the expansion system are compacted and sealed by the inner lining anti-corrosion system.

[0010] Furthermore, the upper surface of the steel inner cylinder connecting platform is a sloping surface, the exhaust inner cylinder is a circular cylinder, and the steel inner cylinder connecting platform is provided with mounting holes of the same number and diameter as the exhaust inner cylinder, and the short-connecting chimney is pre-embedded in the mounting holes.

[0011] Preferably, the inner wall of the concrete outer cylinder near the middle is provided with a suspension system for suspending the multi-tube steel inner cylinder inside the concrete outer cylinder, and the inner wall of the concrete outer cylinder near the bottom is provided with an anti-sway system to limit the swaying of the smoke exhaust inner cylinder.

[0012] Preferably, the lining corrosion protection system includes, but is not limited to, polyurethane asphalt adhesive and foamed brick corrosion protection system.

[0013] Preferably, the concrete outer cylinder includes, but is not limited to, an outer cylinder made of concrete.

[0014] Preferably, the exhaust duct is a cylindrical structure made of metal or fiberglass.

[0015] Preferably, the drainage system includes a drain pipe and an electric valve. The bottom of the exhaust duct is provided with a drain outlet. The drain pipe has multiple drain joints for connecting to the exhaust duct of the multi-pipe steel inner cylinder. The water outlet of the drain pipe is connected to the external water tank of the concrete outer cylinder. Each drain joint is provided with an electric valve.

[0016] The multi-cylinder simplified chimney and its inner wall anti-corrosion structure provided by this utility model have the following advantages:

[0017] 1. The multi-cylinder simplified chimney and its inner wall anti-corrosion structure of this utility model have a small engineering workload. It does not require the installation of a whole steel inner cylinder inside the chimney. It is only necessary to install the exhaust inner cylinder to the steel inner cylinder connecting platform in the middle of the chimney and connect it to the short-connected chimney on the steel inner cylinder connecting platform.

[0018] 2. The multi-cylinder simplified chimney and its inner wall anti-corrosion structure of this utility model have a small anti-corrosion area and low cost. It does not require anti-corrosion of the entire inner wall of the concrete chimney. Only the inner wall of the upper part of the chimney with a small diameter and the lower part of the multiple exhaust inner cylinders need to be protected with an anti-corrosion system. The lower part of the conical concrete does not need to be protected with an anti-corrosion system, thus reducing anti-corrosion costs.

[0019] 3. The multi-cylinder simplified chimney and its inner wall anti-corrosion structure of this utility model have simple operating conditions. The exhaust inner cylinder corresponds to each unit, and the exhaust gas does not interfere with each other. They are connected by a central steel inner cylinder connecting platform, and the exhaust gas is collected and discharged in a unified manner, without affecting the individual unit's shutdown and maintenance flue.

[0020] 4. The multi-cylinder simplified chimney and its inner wall anti-corrosion structure of this utility model have good anti-corrosion versatility. The inner lining is made of sealed anti-corrosion adhesive and anti-corrosion bricks. It can be installed on steel inner cylinder or on concrete. It can seal the expansion system and connect both sides. The overall corrosion resistance is excellent.

[0021] 5. The multi-tube simplified chimney and its inner wall anti-corrosion structure of this utility model have a simple steel inner tube structure, use less steel than the self-supporting type, and have a low cost. The multi-tube steel inner tube is assembled in sections inside the chimney, and the steel chimney is suspended to the suspension system by inverted lifting. The lower part adopts an anti-sway system to prevent swaying.

[0022] 6. The multi-tube simplified chimney and its inner wall anti-corrosion structure of this utility model have a stable and reliable connection structure between the multi-tube steel inner cylinder and the concrete chimney. The inner wall of the concrete chimney is provided with a sloping platform, and multiple short-connected chimneys are provided on the steel inner cylinder connection platform. They are softly connected to each steel inner cylinder through an expansion system and are sealed with anti-corrosion seals, which is stable and reliable. Attached Figure Description

[0023] Figure 1 This is a cross-sectional structural diagram of a multi-cylinder simplified chimney and its inner wall anti-corrosion structure according to the present invention.

[0024] Figure 2 This is a top view of an embodiment of the present utility model, mainly showing the connection relationship between the concrete outer cylinder and the multi-tube steel inner cylinder;

[0025] Figure 3 This is a partial sectional view of the structure at the connection between the multi-tube inner cylinder and the steel inner cylinder connection platform, which is the main feature of this utility model.

[0026] In the picture:

[0027] 1-Concrete outer cylinder; 11-Upper exhaust duct; 12-Lower exhaust duct; 2-Multi-pipe steel inner cylinder; 21-Exhaust inner cylinder; 22-Short-connected chimney; 3-Steel inner cylinder connecting platform; 31-Mounting hole; 4-Fluid duct; 5-Expansion system; 6-Inner lining anti-corrosion system; 7-Suspension system; 8-Anti-sway system; 9-Drainage system. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Reference Figures 1-3 A multi-tube simplified chimney and its inner wall anti-corrosion structure include a concrete outer cylinder 1, a multi-tube steel inner cylinder 2, a steel inner cylinder connecting platform 3, a drainage system 9, and an inner lining anti-corrosion system 6. The concrete outer cylinder 1 is a concrete structure. The multi-tube steel inner cylinder 2 is detachably installed inside the concrete outer cylinder 1 via the steel inner cylinder connecting platform 3. When the multi-tube steel inner cylinder 2 is installed, the concrete outer cylinders 1 are separated and not interconnected by the steel inner cylinder connecting platform 3. The multi-tube steel inner cylinder 2 includes at least one exhaust inner cylinder 21. At least one flue 4 is provided on the bottom side wall of the concrete outer cylinder 1 corresponding to the exhaust inner cylinder 21. Both the exhaust inner cylinder 21 and the flue 4 can be made of ordinary carbon steel. The flue gas can be made of corrosion-resistant metal or fiberglass. The flue gas inner cylinder 21 is connected to the external coal-fired unit through the flue 4. The top of the flue gas inner cylinder 21 is open and located in the middle of the concrete outer cylinder 1 so that the flue gas from the external coal-fired unit can be discharged through the upper part of the concrete outer cylinder 1. The bottom of the multi-pipe steel inner cylinder 2 is connected to a drainage system 9 to discharge the acid generated by the smoke in a timely manner. The inner wall of the concrete outer cylinder 1 located on the upper part of the flue gas inner cylinder 21, as well as the inner wall of each flue gas inner cylinder 21 and flue 4, are equipped with an anti-corrosion lining system 6 to cover and protect the contact surfaces of the concrete outer cylinder 1, flue gas inner cylinder 21, and flue 4 with the smoke, thereby solving the problems of acid corrosion and leakage.

[0030] Reference Figures 1-3The concrete outer cylinder 1 includes an upper flue 11 and a lower flue 12. The upper flue 11 is cylindrical, and the lower flue 12 is conical with its diameter gradually increasing in the direction away from the upper flue 11. The upper flue 11 and the lower flue 12 are coaxially connected and integrally constructed with concrete. The steel inner cylinder connecting platform 3 is integrally cast at the junction of the upper flue 11 and the lower flue 12. The multi-tube steel inner cylinder 2 is located entirely inside the lower flue 12. Each coal-fired unit can be connected to one flue 21 through the flue 4 without interference. The upper flue 11 collects... The exhaust duct 21 can be one, two, or more, depending on the actual exhaust requirements. Multiple short-connection chimneys 22 are installed on the steel inner duct connecting platform 3, corresponding to the exhaust duct 21 inside the multi-tube steel inner duct 2. Specifically, the short-connection chimney 22 is part of the multi-tube steel inner duct 2. The short-connection chimney 22 is pre-embedded after the steel inner duct connecting platform 3 is poured. The short-connection chimney 22 extends downward with a thickness of not less than 5mm and can be made of metal or fiberglass. The exhaust duct 21 is connected to the upper exhaust duct 11 through the short-connection chimney 22.

[0031] Furthermore, the upper surface of the steel inner cylinder connecting platform 3 is a sloping surface, which facilitates the flow of some liquid from the upper exhaust chimney 11 into the multi-tube steel inner cylinder 2. The exhaust inner cylinder 21 is a circular cylinder. The steel inner cylinder connecting platform 3 is provided with mounting holes 31 of the same number and diameter as the exhaust inner cylinder 21. The short-connected chimney 22 is pre-embedded in the mounting holes 31. The short-connected chimney 22 and the corresponding exhaust inner cylinder 21 are flexibly connected through the expansion system 5, thereby connecting the short-connected chimney 22 and the exhaust inner cylinder 21 into an integral system with anti-corrosion and anti-seepage properties. This can solve the longitudinal thermal expansion and lateral sway of the exhaust inner cylinder 21, and at the same time, it can adjust the installation distance of the lower exhaust inner cylinder 21, which is convenient for high-altitude steel structure installation. Specifically, the expansion system 5 can be a combination structure of fluororubber skin and pressure strip, which connects the short-connected chimney 22 and the exhaust inner cylinder 21 respectively. This is existing technology and will not be described in detail.

[0032] Furthermore, the internal lining anti-corrosion system 6 includes, but is not limited to, a polyurethane asphalt adhesive and a foamed brick anti-corrosion system, which is made of sealed anti-corrosion adhesive and anti-corrosion bricks. It can resist acid corrosion and flue gas temperature. Both ends of the short-connected chimney 22 and the flue gas inner cylinder 21 and the expansion system 5 are compacted and sealed by the internal lining anti-corrosion system 6, which further ensures the corrosion resistance of the multi-tube steel inner cylinder 2 and extends its service life.

[0033] Reference Figure 1In a further embodiment, multiple suspension systems 7 are installed on the inner wall of the lower chimney 12 near the steel inner cylinder connecting platform 3 to suspend the multi-tube steel inner cylinder 2 inside the concrete outer cylinder. The suspension system 7 has a suspension platform that is cast or bolted and a suspension component for suspending the exhaust inner cylinder 21. The suspension component includes, but is not limited to, clamp brackets or U-shaped frames used in conjunction with the suspension platform. Multiple anti-sway systems 8 are installed on the inner wall of the concrete outer cylinder 1 near the bottom to prevent swaying and limit the swaying of the exhaust inner cylinder 21. The anti-sway system 8 includes, but is not limited to, metal damper anti-sway devices, horizontal limiting short beams or inner cylinder stiffening rings. In this embodiment, the use of suspension system 7 and anti-sway system 8 is prior art and will not be described in detail.

[0034] During installation, the segmented exhaust inner cylinder 21 is assembled inside the chimney by hydraulic lifting and fixed to the suspension platform on the outer cylinder by the suspension system 7. Depending on the space and needs, each unit can have its own inner cylinder without interference.

[0035] Reference Figure 1 The drainage system 9 includes a drain pipe and an electric valve (not shown in the figure). The bottom of the exhaust inner cylinder 21 is provided with a drain outlet. The drain pipe has multiple drain joints for connecting to the exhaust inner cylinder 21 inside the multi-pipe steel inner cylinder 2. The water outlet of the drain pipe is connected to the external water pool of the concrete outer cylinder 1. An electric valve is installed on each drain joint. During exhaust, some of the smoke condensation in the upper exhaust cylinder 11 flows along the inner wall of the upper exhaust cylinder 11 to the steel inner cylinder connecting platform 3, and then flows along the slope of the steel inner cylinder connecting platform 3 to the exhaust inner cylinder 21. Finally, it flows through the inner wall of the exhaust inner cylinder 21 to the drain pipe and is discharged to the external water pool by the control of the electric valve. This reduces the possibility of acid accumulation accelerating corrosion. In this embodiment, the use of the electric valve is existing technology and will not be described in detail.

[0036] The installation steps of this utility model for a multi-cylinder simplified chimney and its inner wall anti-corrosion structure are as follows:

[0037] First, construct the concrete outer chimney 1, and pour the steel inner cylinder connecting platform 3 inside the concrete chimney. Install the suspension system 7 and anti-sway system 8 components. Assemble the multi-tube steel inner cylinder 2 inside the concrete outer chimney 1. Use a liquid lifting method to install and suspend the multi-tube steel inner cylinder 2 on the suspension system 7. Complete the anti-sway system 8 components. Assemble the flue 4. Connect the upper end of the multi-tube steel inner cylinder 2 to the steel inner cylinder connecting platform 3 and the lower end to the flue 4. The connection method uses an expansion system 5. Install a drainage system 9 at the bottom.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A multi-cylinder simple chimney and inner wall corrosion prevention structure comprising a concrete outer cylinder (1), characterized in that, The concrete outer cylinder (1) is provided with a multi-pipe steel inner cylinder (2) through a steel inner cylinder connecting platform (3) in the concrete outer cylinder (1), the multi-pipe steel inner cylinder (2) comprises at least one smoke exhaust inner cylinder (21), the smoke exhaust inner cylinder (21) is open at the top end and located in the middle part of the concrete outer cylinder (1), at least one flue (4) is arranged on the side wall of the bottom end of the concrete outer cylinder (1) and corresponds to the smoke exhaust inner cylinder (21), the smoke exhaust inner cylinder (21) is communicated with the external coal-fired unit through the flue (4); the multi-pipe steel inner cylinder (2) is communicated with a drainage system (9) at the bottom, and an inner lining corrosion prevention system (6) is arranged on the inner wall of the concrete outer cylinder (1) located above the smoke exhaust inner cylinder (21) and on the inner wall of each smoke exhaust inner cylinder (21).

2. A multi-cylinder simple smokestack and inner wall anticorrosion structure according to claim 1, characterized in that, The concrete outer cylinder (1) comprises an upper smoke exhaust cylinder (11) and a lower smoke cylinder (12), the upper smoke exhaust cylinder (11) is in a cylindrical shape, the lower smoke cylinder (12) is in a conical shape and the diameter gradually increases in the direction away from the upper smoke exhaust cylinder (11), the upper smoke exhaust cylinder (11) and the lower smoke cylinder (12) are coaxially connected, the steel inner cylinder connecting platform (3) is arranged at the variable-diameter position where the upper smoke exhaust cylinder (11) and the lower smoke cylinder (12) are connected, and the multi-pipe steel inner cylinder (2) is located in the lower smoke cylinder (12) as a whole, a plurality of short smoke chimneys (22) corresponding to the smoke exhaust inner cylinder (21) in the multi-pipe steel inner cylinder (2) are arranged on the steel inner cylinder connecting platform (3), and the smoke exhaust inner cylinder (21) is communicated with the upper smoke exhaust cylinder (11) through the short smoke chimney (22).

3. A multi-cylinder simple chimney and inner wall corrosion-proof structure according to claim 2, characterized in that, The short smoke chimney (22) and the corresponding smoke exhaust inner cylinder (21) are connected through an expansion system (5).

4. A multi-cylinder simple smokestack and inner wall corrosion-proof structure according to claim 3, characterized in that, The two ends of the short smoke chimney (22) and the smoke exhaust inner cylinder (21) connected with the expansion system (5) are compactly sealed through the inner lining corrosion prevention system (6).

5. A multi-cylinder simple smokestack and inner wall corrosion-proof structure according to claim 2, characterized in that, The upper surface of the steel inner cylinder connecting platform (3) is a slope surface, the smoke exhaust inner cylinder (21) is a circular cylinder, the steel inner cylinder connecting platform (3) is provided with mounting holes (31) equal in number and diameter to the smoke exhaust inner cylinders (21), and the short smoke chimneys (22) are embedded in the mounting holes (31).

6. A multi-cylinder simple smokestack and inner wall corrosion-proof structure according to claim 1, characterized in that, A suspension system (7) is arranged on the inner wall of the concrete outer cylinder (1) near the middle part for suspending the multi-pipe steel inner cylinder (2) in the concrete outer cylinder, and a sway prevention system (8) is arranged on the inner wall of the concrete outer cylinder (1) near the bottom to limit the sway of the smoke exhaust inner cylinder (21).

7. A multi-cylinder simple smokestack and inner wall corrosion-proof structure according to claim 1, characterized in that, The inner lining corrosion prevention system (6) comprises a polyurethane asphalt adhesive and a foamed brick corrosion prevention system.

8. A multi-cylinder simple smokestack and inner wall anticorrosion structure according to claim 1, characterized in that, The concrete outer cylinder (1) comprises a concrete structure.

9. A multi-cylinder simple smokestack and inner wall corrosion-proof structure according to claim 1, characterized in that, The smoke exhaust inner cylinder (21) comprises a cylindrical structure made of metal or glass fiber reinforced plastic.

10. A multi-cylinder simple smokestack and inner wall corrosion-proof structure according to claim 1, characterized in that, The drainage system (9) comprises a drainage pipe and an electric valve, the smoke exhaust inner cylinder (21) is provided with a drainage opening at the bottom, the drainage pipe is provided with a plurality of drainage joints for connecting the smoke exhaust inner cylinders (21) in the multi-pipe steel inner cylinder (2), a water outlet end of the drainage pipe is communicated with a water pool outside the concrete outer cylinder (1), and the electric valve is arranged on each drainage joint.

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