Corrosion prevention device for concrete chimney
By installing components such as titanium sleeves and flue gas mixing chambers inside concrete chimneys, the problem of corrosion prevention construction affecting production was solved, achieving rapid and low-cost corrosion prevention, and ensuring stable flue gas emissions and equipment safety.
Patent Information
- Application Number
- CN202520030083.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Existing technologies for corrosion protection of concrete chimneys require long-term furnace shutdowns, which are difficult and costly to implement. Furthermore, conventional construction methods disrupt production, and quality and safety cannot be guaranteed.
The concrete chimney is equipped with components such as column supports, titanium sleeves, flue gas mixing chambers, and planar support frames to form an anti-corrosion device. The corrosion resistance of titanium material is utilized to prevent flue gas from directly contacting the inner wall of the chimney. The segmented structure and sealing design simplify the construction.
There is no need to remove the insulation layer and acid-resistant brick layer, which shortens the construction cycle, reduces costs, improves construction efficiency, ensures stable emission of flue gas and prevents corrosion, and guarantees continuous production.
Smart Images
Figure CN223595957U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of flue gas emission, in particular to a concrete chimney anticorrosion device. BACKGROUND
[0002] Ordinary concrete boiler chimneys are usually only heat-insulated and slightly anticorrosion constructed because the emission medium is dry flue gas. However, with the improvement of environmental protection requirements and emission indexes, the original flue gas emitted by the chimney is changed into wet flue gas after wet desulfurization. Therefore, in order to adapt to the emission characteristics of the wet flue gas, the corrosion protection capability of the chimney needs to be improved.
[0003] For the anticorrosion upgrading of the boiler chimney, acid-resistant bricks or anticorrosion paint are usually used for the anticorrosion construction of the chimney to effectively reduce the corrosion of the wet flue gas to the inner wall of the chimney. However, when the anticorrosion construction is carried out, the boiler needs to be stopped, which leads to the failure to carry out normal production work, and the anticorrosion construction cycle is relatively long, usually 3-6 months, which has a great influence on production. Meanwhile, for the conventional anticorrosion construction, the original chimney heat insulation layer and acid-resistant brick layer need to be removed, the construction difficulty is great, the maintenance cost is high, and the construction quality and safety cannot be guaranteed. SUMMARY
[0004] To solve or partially solve the problems in the prior art, the application provides a concrete chimney anticorrosion device which is arranged in the original concrete chimney, has a simple structure and is convenient to construct, and can effectively prevent the concrete chimney from being corroded by flue gas.
[0005] The application provides a concrete chimney anticorrosion device which is arranged in the original concrete chimney, has a simple structure and is convenient to construct, and can effectively prevent the concrete chimney from being corroded by flue gas.
[0006] The column support is arranged at the bottom of the concrete chimney and is used for providing vertical support and fixation for the titanium sleeve.
[0007] The titanium sleeve is arranged on the column support.
[0008] The flue gas mixing chamber is arranged at the bottom of the concrete chimney and is located below the titanium sleeve, the top of the flue gas mixing chamber is in sealed communication with the bottom of the titanium sleeve, and the flue gas mixing chamber is in sealed communication with each boiler flue port in the concrete chimney.
[0009] The flue gas mixing chamber is provided with a flue gas deflector and a drain pipe at the bottom of the flue gas mixing chamber.
[0010] The planar support frame is arranged on the horn platform in the concrete chimney and is used for providing horizontal support and fixation for the titanium sleeve.
[0011] The planar support frames are provided in at least two groups, and steel ladders are arranged between each planar support frame.
[0012] Optionally, in some embodiments of the present application:
[0013] The titanium sleeve is a three-section structure, including: a top sleeve, a middle sleeve and a low sleeve.
[0014] The top sleeve, the middle sleeve and the low sleeve are all provided with a lower insertion type bearing port for connecting and fixing between each sleeve.
[0015] Optionally, in some embodiments of the present application:
[0016] A sealing material is arranged at the lower insertion type bearing port for sealing each sleeve after installation and connection.
[0017] Optionally, in some embodiments of the present application:
[0018] The top of the top sleeve is provided with an upper lightning rod.
[0019] The upper lightning rod is connected with the lightning protection grounding net of the concrete chimney.
[0020] Optionally, in some embodiments of the present application:
[0021] The top of the top sleeve is provided with a rain baffle for plugging the gap between the top sleeve and the concrete chimney to prevent rainwater from entering.
[0022] Optionally, in some embodiments of the present application:
[0023] The flue gas mixing chamber is provided with a sealing plate at the communication part of the titanium sleeve and the flue port.
[0024] Optionally, in some embodiments of the present application:
[0025] The flue gas mixing chamber is composed of titanium plates as a whole, and the bottom plate of the flue gas mixing chamber is inclined to guide the condensed water into the drain pipe for discharge.
[0026] The technical scheme provided by the present application can include the following beneficial effects:
[0027] The concrete chimney corrosion prevention device of the present application is arranged in the original concrete chimney, can fully utilize the original concrete chimney as a support and wind load outer cylinder, does not need to carry out the construction operation of removing the concrete chimney heat insulation layer and acid-resistant brick layer, can effectively reduce the construction cost, and the concrete chimney corrosion prevention device of the present application has simple structure and convenient and fast construction.
[0028] The titanium sleeve in the application is a three-section structure, the top sleeve, the middle sleeve and the low sleeve are all welded by titanium plates and are prefabricated, through prefabrication, the construction cycle of stopping furnace can be effectively shortened, and through the three-section structure, the installation in the concrete chimney can be facilitated, and the construction efficiency is improved.
[0029] The flue gas mixing chamber in the application connects the flue of the concrete chimney, the flue gas discharged from the flue will pass through the flue gas mixing chamber and the titanium sleeve in sequence and then be directly discharged, which will not cause corrosion to the original concrete chimney, and can effectively avoid the corrosion of the concrete chimney by flue gas. At the same time, through the setting of the flue gas guide plate, the flue gas can be well guided, the exhaust efficiency is improved, and the backflow of the flue gas in the mixing chamber can be prevented, the unidirectionality and stability of the flue gas flow are ensured; through the setting of the drain pipe, the condensed water can be effectively managed, the dryness of the internal environment of the chimney is ensured, the corrosion to the concrete chimney is avoided, and the flue gas discharge is affected.
[0030] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS
[0031] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and in which exemplary embodiments of the present application are shown.
[0032] Figure 1 is a front view cross-sectional structural schematic diagram of the concrete chimney corrosion prevention device of the application;
[0033] Figure 2 is a front view cross-sectional structural schematic diagram of the flue gas mixing chamber in the application;
[0034] Figure 3 is a side view cross-sectional structural schematic diagram of the concrete chimney corrosion prevention device of the application;
[0035] Figure 4 is a side view cross-sectional structural schematic diagram of the flue gas mixing chamber in the application;
[0036] Figure 5 is a whole structural schematic diagram of the titanium sleeve in the application;
[0037] Figure 6 is a whole structural schematic diagram of the flue gas mixing chamber in the application;
[0038] Figure 7 is a top view structural schematic diagram of the planar support frame in the application;
[0039] Figure 8is a schematic diagram of a mounting structure of a titanium plate of a flue opening.
[0040] Reference signs: 1-concrete chimney, 2-column support, 3-titanium sleeve, 301-top sleeve, 302-middle sleeve, 303-low sleeve, 4-flue gas mixing chamber, 401-flue gas guide plate, 5-flat support frame, 6-sealing plate. DETAILED DESCRIPTION
[0041] Embodiments of the present application will be described in more detail by referring to the attached drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.
[0042] It should be understood that although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.
[0043] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0044] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0045] For the corrosion upgrading of the boiler chimney, acid-resistant bricks or corrosion-resistant paint are usually used for the corrosion protection construction of the chimney to effectively reduce the corrosion of the wet flue gas on the inner wall of the chimney. However, during the corrosion protection construction, the boiler needs to be shut down, which leads to the inability to carry out normal production work, and the corrosion protection construction period is relatively long, usually 3-6 months, which has a great impact on production. At the same time, for the conventional corrosion protection construction, the original chimney insulation layer and acid-resistant brick layer need to be removed, which has great construction difficulty and high maintenance cost, and the construction quality and safety cannot be guaranteed.
[0046] In view of the above problems, the concrete chimney corrosion protection device provided by the embodiment of the present application is arranged and installed in the original concrete chimney, which has simple structure and convenient construction, and can effectively prevent the concrete chimney from being corroded by flue gas.
[0047] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.
[0048] Figure 1 is a front view sectional structure schematic diagram of the concrete chimney corrosion protection device of the present application;
[0049] Figure 2 is a front view sectional structure schematic diagram of the flue gas mixing chamber in the present application;
[0050] Figure 3 is a side view sectional structure schematic diagram of the concrete chimney corrosion protection device of the present application;
[0051] Figure 4 is a side view sectional structure schematic diagram of the flue gas mixing chamber in the present application;
[0052] Figure 5 is a whole structure schematic diagram of the titanium sleeve in the present application;
[0053] Figure 6 is a whole structure schematic diagram of the flue gas mixing chamber in the present application;
[0054] Figure 7 is a top view structure schematic diagram of the plane support frame in the present application;
[0055] Figure 8 is a mounting structure schematic diagram of the titanium plate of the flue port in the present application.
[0056] Referring to Figures 1-8 A concrete chimney corrosion protection device is arranged and installed in the original concrete chimney 1, which comprises: a column support 2, a titanium sleeve 3, a flue gas mixing chamber 4, and a plane support frame 5.
[0057] The column support 2 is arranged at the bottom of the concrete chimney 1 to provide vertical support for the titanium sleeve 3. In this embodiment, the column support 2 is a steel column structure, and the bottom of the column support 2 is cast in the bottom of the concrete chimney 1, which has good load-bearing capacity and corrosion resistance.
[0058] The titanium sleeve 3 is arranged on the column support 2. Specifically, the titanium sleeve 3 is a three-section structure, including a top sleeve 301, a middle sleeve 302, and a lower sleeve 303. The top sleeve 301, the middle sleeve 302, and the lower sleeve 303 are all provided with a lower insertion type bearing port for connecting and fixing the sleeves. In this embodiment, the top sleeve 301, the middle sleeve 302, and the lower sleeve 303 are all prefabricated by welding titanium plates, and reinforcing ring stiffeners are welded on the side walls of the sleeves to ensure the structural strength of the sleeves. The prefabrication can effectively shorten the shutdown construction period, and the three-section structure can facilitate installation in the concrete chimney 1, improve construction efficiency, and ensure installation stability through the lower insertion type bearing port.
[0059] Specifically, sealing material is arranged at the lower insertion type bearing port to seal the connected sleeves. In this embodiment, the sealing material is composed of acid-resistant silicone and acid-resistant mortar, which can effectively seal the sleeve connection to prevent smoke leakage and maintain good sealing performance in high-temperature and corrosive environments to ensure long-term sealing.
[0060] Specifically, the top of the top sleeve 301 is provided with an upper lightning rod, which is connected to the lightning protection grounding network of the concrete chimney 1. In this embodiment, the upper lightning rod is connected to the lightning protection grounding network of the concrete chimney 1 to form an effective lightning protection system to ensure the safety of the concrete chimney 1 and its internal equipment in rainy weather.
[0061] Specifically, the top of the top sleeve 301 is provided with a rain baffle to block the gap between the top sleeve 301 and the concrete chimney 1 to prevent rainwater from entering. In this embodiment, the rain baffle is a rain hat structure arranged obliquely to prevent rainwater from entering the concrete chimney 1 and to protect the internal equipment from water damage.
[0062] The smoke mixing chamber 4 is arranged at the bottom of the concrete chimney 1 below the titanium sleeve 3. The top of the smoke mixing chamber 4 is sealed and communicated with the bottom of the titanium sleeve 3, and the smoke mixing chamber 4 is sealed and communicated with each boiler flue port in the concrete chimney 1. The smoke mixing chamber 4 is provided with a smoke guide plate 401 inside, and a drain pipe is arranged at the bottom of the smoke mixing chamber 4.
[0063] In the embodiment, the concrete chimney 1 is a double flue, and the two flues of the concrete chimney 1 are connected through the flue gas mixing chamber 4. The flue gas discharged from the flues passes through the flue gas mixing chamber 4 and the titanium sleeve 3 in sequence and is directly discharged, without corroding the original concrete chimney 1, so that the corrosion of the concrete chimney 1 by flue gas can be effectively avoided. Meanwhile, in the embodiment, the flue gas is well guided by the flue gas guide plate 401, the exhaust efficiency is improved, and the backflow of the flue gas in the flue gas mixing chamber is prevented, so that the unidirectionality and stability of the flue gas flow are ensured. The drain pipe is used to discharge the flue gas condensate from the chimney inspection manhole to the outside of the chimney for collection and treatment, so that the condensate can be effectively managed, the dryness of the internal environment of the chimney is ensured, the corrosion of the concrete chimney 1 is avoided, and the flue gas discharge is affected.
[0064] Specifically, the sealing plates 6 are arranged at the connection positions of the flue gas mixing chamber 4, the titanium sleeve 3 and the flue port. In the embodiment, the sealing plates 6 are titanium plates, which are sealed and fixed by welding, so as to have good corrosion resistance while ensuring the sealing performance.
[0065] Specifically, the flue gas mixing chamber 4 is composed of titanium plates, and the bottom plate of the flue gas mixing chamber 4 is inclined, so as to guide the condensate into the drain pipe. In the embodiment, the flue gas mixing chamber 4 is composed of titanium plates, so as to have excellent corrosion resistance, prolong the service life and reduce the maintenance cost. Meanwhile, the bottom plate of the flue gas mixing chamber 4 is inclined, so as to better guide the condensate to the drain pipe for collection.
[0066] The planar support frames 5 are arranged on the horn platforms in the concrete chimney 1, and are used to support and fix the titanium sleeve 3 in the horizontal direction. In the embodiment, three planar support frames 5 are arranged, and steel ladders are arranged between the planar support frames 5. In the embodiment, the planar support frames 5 arranged on the horn platforms in the concrete chimney 1 can provide reliable horizontal support for the titanium sleeve 3, so as to further ensure the installation stability of the titanium sleeve 3, and the steel ladders can provide convenience for maintenance and inspection.
[0067] Corresponding to the foregoing application function implementation device embodiment, the application embodiment further provides a concrete chimney corrosion prevention method and a corresponding embodiment. The method comprises:
[0068] A column support 2 is arranged at the bottom of the concrete chimney 1;
[0069] A planar support frame 5 is arranged on each horn platform in the concrete chimney 1;
[0070] A lower sleeve 303, a middle sleeve 302 and a top sleeve 301 are sequentially hoisted and fixed into each planar support frame 5 from bottom to top, so as to install the titanium sleeve 3 on the column support 2;
[0071] The flue gas mixing chamber 4 is installed at the bottom of the concrete chimney 1, and is connected with the boiler flue and the low sleeve 303 respectively and is sealed, so that the flue gas discharged from the boiler flue is discharged after passing through the flue gas mixing chamber 4 and the titanium sleeve 3 in turn.
[0072] In this embodiment, by constructing according to the method for preventing the concrete chimney from being corroded, the device for preventing the concrete chimney from being corroded can be safely and efficiently installed in the concrete chimney 1, and the concrete chimney 1 is prevented from being corroded.
[0073] The technical solutions in the embodiments of the present application have the following beneficial effects:
[0074] The device for preventing the concrete chimney from being corroded in the present application is arranged in the original concrete chimney 1, and the original concrete chimney 1 can be fully utilized as a support and a wind load outer cylinder, so that the construction work of removing the heat insulation layer and the acid-resistant brick layer of the concrete chimney 1 is not required, the construction cost can be effectively reduced, and the device for preventing the concrete chimney from being corroded has a simple structure and is convenient and fast to construct.
[0075] The titanium sleeve 3 in the present application has a three-section structure, and the top sleeve 301, the middle sleeve 302 and the low sleeve 303 are all pre-fabricated by welding titanium plates. The pre-fabrication can effectively shorten the construction period of stopping the furnace, and the three-section structure can facilitate the installation in the concrete chimney 1 and improve the construction efficiency.
[0076] The flue gas mixing chamber 4 in the present application is connected with the flue of the concrete chimney 1, and the flue gas discharged from the flue is directly discharged after passing through the flue gas mixing chamber 4 and the titanium sleeve 3 in turn, so that the original concrete chimney 1 is not corroded, and the concrete chimney 1 can be effectively prevented from being corroded by the flue gas. At the same time, the flue gas can be well guided by arranging the flue gas guide plates 401, the exhaust efficiency is improved, the backflow of the flue gas in the mixing chamber is prevented, the unidirectionality and stability of the flue gas flow are ensured, the condensate water can be effectively managed by arranging the drain pipe, the dryness of the internal environment of the chimney is ensured, the corrosion of the concrete chimney 1 is avoided, and the emission of the flue gas is affected.
[0077] Finally, it should be noted that in this document, relationships such as first and second, and the like, are merely used to distinguish one entity or action from another, and do not require or imply any actual relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0078] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.
Claims
1. A device for the corrosion protection of concrete chimneys, characterized in that: The concrete chimney anticorrosion device is arranged in the original concrete chimney (1), and comprises a column support (2), a titanium sleeve (3), a flue gas mixing chamber (4), and a plane support frame (5). The column support (2) is arranged at the bottom of the concrete chimney (1) and is used for providing vertical support and fixation for the titanium sleeve (3). The titanium sleeve (3) is arranged on the column support (2). The flue gas mixing chamber (4) is arranged at the bottom of the concrete chimney (1) and is located below the titanium sleeve (3). The top of the flue gas mixing chamber (4) is in sealed communication with the bottom of the titanium sleeve (3), and the flue gas mixing chamber (4) is in sealed communication with each boiler flue port in the concrete chimney (1). The flue gas mixing chamber (4) is provided with a flue gas guide plate (401) inside, and is provided with a drain pipe at the bottom. The plane support frame (5) is arranged on the oxhorn platform in the concrete chimney (1) and is used for providing horizontal support and fixation for the titanium sleeve (3). The plane support frame (5) is provided with at least two groups, and each plane support frame (5) is provided with a steel ladder.
2. The apparatus for the preservation of concrete smokestacks according to claim 1, characterized in that: The titanium sleeve (3) is a three-section structure, comprising a top sleeve (301), a middle sleeve (302), and a low sleeve (303). The top sleeve (301), the middle sleeve (302), and the low sleeve (303) are all provided with a lower insertion type bearing port for connecting and fixing each sleeve.
3. The apparatus for the preservation of concrete smokestacks according to claim 2, characterized in that: Sealing material is arranged at the lower insertion type bearing port for sealing each sleeve after installation and connection.
4. The apparatus for the preservation of concrete smokestacks according to claim 3, characterized in that: The top of the top sleeve (301) is provided with an upper lightning rod. The upper lightning rod is connected with the lightning protection grounding net of the concrete chimney (1).
5. The apparatus for the preservation of concrete smokestacks according to claim 4, characterized in that: The top of the top sleeve (301) is provided with a rain shield for blocking the gap between the top sleeve (301) and the concrete chimney (1) to prevent rainwater from entering.
6. The apparatus for the preservation of concrete smokestacks according to claim 5, characterized in that: The flue gas mixing chamber (4) is provided with a sealing plate (6) at the communication position of the titanium sleeve (3) and the flue port.
7. The apparatus for the preservation of concrete smokestacks according to claim 6, characterized in that: The flue gas mixing chamber (4) is composed of a titanium plate. The bottom plate of the flue gas mixing chamber (4) is inclined to guide the condensed water into the drain pipe.