Detachable sealing structure for inlet of waste heat boiler

Abstract

A detachable sealing structure for an inlet of a waste heat boiler relates to the technical field of boiler equipment and comprises a sealing surface assembly, a bottom plate and a plurality of sealing steel plates. The sealing face assembly comprises a plurality of sealing plates, the sealing plates are attached end to end to form the hollow sealing face assembly, and an expansion belt is arranged between every two adjacent sealing plates. A bottom plate is arranged at the bottoms of the sealing plates, sealing steel plates are arranged on the outer sides of the multiple sealing plates, and the bottom plate is perpendicular to the sealing steel plates. Through the design that the multiple sealing plates on the lower portion are independently poured and can be independently pulled out, the sealing plates can be pre-poured in advance, the damaged sealing plates are pulled out when the sealing plates are damaged, the sealing plates which are poured in advance can be replaced in time, the time for formwork supporting construction, masonry, maintenance and baking in the overhaul process is effectively shortened, and the maintenance efficiency is improved. Conditions are provided for some projects to catch up to the work period and create production benefits in advance.

Description

Technical Field

[0001] In the technical field of boiler equipment, this utility model specifically refers to a detachable sealing structure for the inlet of a waste heat boiler. Background Technology

[0002] With the continuous growth of global energy demand, governments around the world are striving to improve energy efficiency and reduce energy waste. As a device that can effectively utilize waste heat and reduce energy waste, waste heat boilers will see increasing market demand. The boiler industry is changing rapidly, and waste heat boilers will become the mainstream boiler type in China, marking a significant period of rapid development.

[0003] The sealing plate at the inlet of a conventional waste heat boiler is welded to the interface of the expansion joint and the lean furnace. This area experiences high flue gas temperature, severe wear, harsh working environment, and is prone to failure. If maintenance is required, the entire structure must be dismantled, damaging the castable refractory. Formwork must be erected for fixation before casting can begin. After casting, curing and drying the furnace are necessary to completely remove moisture from the castable refractory to meet the operational requirements of high-temperature erosion and wear resistance. This curing and drying process takes approximately two weeks.

[0004] Currently, many of the malfunctions of waste heat boilers are caused by the detachment of refractory material at the inlet and leakage in the water jacket, forcing the boiler to shut down. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a detachable sealing structure for the inlet of a waste heat boiler, which at least partially solves the above technical problems.

[0006] The technical solution adopted by this utility model is as follows: a detachable sealing structure for the inlet of a waste heat boiler, including a sealing surface assembly, a base plate, and multiple sealing steel plates;

[0007] The sealing surface assembly includes multiple sealing plates, which are fitted end-to-end to form a hollow sealing surface assembly, and an expansion band is provided between two adjacent sealing plates.

[0008] The bottom of the sealing plate is provided with a base plate, and a sealing steel plate is provided on the outer side of each of the multiple sealing plates. The base plate is set perpendicular to the sealing steel plate.

[0009] Furthermore, the expansion band is configured to be non-linear, and the expansion band is made of aluminum silicate fiber rope or aluminum silicate fiber.

[0010] Furthermore, the sealing plate is made of refractory castable, and metal anchors are provided inside the sealing plate.

[0011] Furthermore, it also includes multiple towing lugs, which are disposed on the side of the sealing steel plate away from the sealing plate;

[0012] Several of the sealed steel plates are equipped with drag lugs.

[0013] Furthermore, it also includes an expansion joint, which is disposed above the sealing surface assembly;

[0014] The multiple sealing steel plates are connected by flanges, and the upper and lower ends of the sealing steel plates are respectively connected to the flanges at the expansion joint and the interface of the depletion furnace.

[0015] Furthermore, a sealing gasket is provided between the expansion joint and the sealing steel plate, and the sealing gasket is made of aluminum silicate fiber rope or aluminum silicate fiber.

[0016] The beneficial effects of this utility model by adopting the above structure are as follows:

[0017] This invention features a design that allows multiple sealing plates at the bottom to be cast independently and removed individually. The sealing plates can also be pre-cast, and if damaged, the damaged sealing plate can be removed and replaced with a pre-cast sealing plate in a timely manner. This effectively shortens the time required for formwork construction, masonry, curing, and furnace drying during maintenance, providing conditions for some projects to meet tight deadlines and create production benefits ahead of schedule. Attached Figure Description

[0018] Figure 1 This is a simplified structural diagram of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 for Figure 1 AA top view;

[0021] Figure 4 This is a front view of the drag lug in this utility model.

[0022] In the diagram: 2-base plate; 3-sealing steel plate; 4-drafting lug; 5-expansion joint;

[0023] 11-Sealing plate; 12-Expansion band; 13-Metal anchor; 31-Sealing gasket.

[0024] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] To save construction time, this utility model proposes a detachable sealing structure for the inlet of a waste heat boiler. Instead of welding the traditional inlet sealing plate to the expansion joint and the interface with the lean furnace, a flange connection is used. The four lower surfaces are independently cast and can be pulled out individually, or pre-cast, allowing for timely replacement in case of damage. This effectively shortens the time required for formwork construction, masonry, curing, and furnace drying during maintenance, providing conditions for projects with tight deadlines and early production benefits.

[0028] Specific examples Figures 1 to 4 To solve the above problems, this utility model provides a detachable sealing structure for the inlet of a waste heat boiler, including a sealing surface assembly, a base plate 2, and multiple sealing steel plates 3.

[0029] The sealing surface assembly includes multiple sealing plates 11, which are fitted end to end to form a hollow sealing surface assembly. An expansion band 12 is provided between two adjacent sealing plates 11.

[0030] The bottom of the sealing plate 11 is provided with a base plate 2, and the outer sides of the plurality of sealing plates 11 are provided with sealing steel plates 3, and the base plate 2 is perpendicular to the sealing steel plates 3.

[0031] It should be noted that by connecting multiple sealing plates 11 end to end to form a hollow sealing surface assembly, each sealing plate 11 can be pulled out individually. A sealing steel plate 3 is provided on the outside of the sealing plate and a base plate 2 is provided at the bottom of the sealing surface assembly to facilitate the overall connection of the sealing surface composed of sealing plates 11.

[0032] The sealing plate 11 is installed in the area between the base plate 2 and the sealing steel plate 3 by casting, and the casting material of the sealing plate 11 is refractory castable.

[0033] In a further embodiment of this invention, the expansion band 12 is configured to be non-linear, and the expansion band 12 is made of aluminum silicate fiber rope or aluminum silicate fiber.

[0034] It should be noted that the expansion band 12 is placed between two adjacent sealing plates 11 in the form of a plug. The two adjacent sealing plates 11 have an expansion joint when they are cast. During the installation process, the expansion band 12 is plugged into the expansion joint between the two adjacent sealing plates 11 to avoid damage to the sealing plates 11 due to thermal expansion.

[0035] The expansion band 12 uses aluminum silicate fiber rope or aluminum silicate fiber, which has excellent high temperature resistance and can be used for a long time in the temperature range of 800℃ to 1400℃. It can withstand higher temperatures (such as 1600℃) for a short time. It has good corrosion resistance to most chemicals, especially performing well in high temperature environments. Compared with traditional metal or ceramic materials, aluminum silicate fiber rope is lighter and easier to install.

[0036] In a further embodiment of this example, the sealing plate 11 is made of refractory castable, and a metal anchor 13 is provided inside the sealing plate 11.

[0037] The use of refractory casting materials meets the high-temperature resistance requirements during use. The metal anchors 13 installed in the sealing plate 11 can effectively increase the tensile strength, provide additional support in the tension zone, prevent crack propagation, thereby improving the overall load-bearing capacity of the structure, helping to distribute the load, reduce local stress concentration, and ensure that the structure is more stable when bearing external loads.

[0038] In a further embodiment of this invention, a plurality of towing lugs 4 are also included, the towing lugs 4 being disposed on the side of the sealing steel plate 3 away from the sealing plate 11;

[0039] Among them, multiple sealing steel plates 3 are equipped with drag lugs 4.

[0040] It should be noted that by setting a drag lug 4 on one side of the sealing steel plate 3, it is convenient to pull out and replace the seal 11 when it is replaced.

[0041] In a further embodiment of this invention, an expansion joint 5 is also included, which is disposed above the sealing surface assembly;

[0042] The plurality of sealing steel plates 3 are connected by flanges, and the upper and lower ends of the sealing steel plates 3 are respectively connected to the expansion joint 5 and the flange at the interface of the depletion furnace.

[0043] It should be noted that the traditional welding treatment at the inlet sealing plate 11 to the expansion joint 5 and the interface of the lean furnace has been replaced with a flange connection; the multiple sealing plates 11 at the bottom are cast independently and can be extracted individually, or they can be pre-cast and replaced in time if damaged.

[0044] In a further embodiment of this example, a sealing gasket 31 is provided between the expansion joint 5 and the sealing steel plate 3, and the sealing gasket 31 is made of aluminum silicate fiber rope or aluminum silicate fiber.

[0045] The upper and lower parts of the expansion joint 5 are cast independently. The expansion amount of the boiler is reserved between the expansion joint 5 and the sealing plate 11. The flange connection is easy to disassemble. The flange is plugged with aluminum silicate fiber rope or aluminum silicate fiber tape. The side of the sealing plate 11 where it connects with the lean furnace is also connected by a flange and can be pulled out separately. A hydraulic cylinder can also be added to the outside to improve the degree of automatic control.

[0046] In summary, this utility model has the following advantages:

[0047] Simple structure, easy to assemble on-site, saving installation time. Convenient disassembly and maintenance, shortening time and improving efficiency. Pre-cast concrete can be used, allowing for quick replacement after damage, shortening repair time. Hydraulic cylinder drive can be added, enabling a high degree of automatic control.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

[0050] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A detachable sealing structure for the inlet of a waste heat boiler, characterized in that: Includes sealing surface assembly, base plate, and multiple sealing steel plates; The sealing surface assembly includes multiple sealing plates, which are fitted end-to-end to form a hollow sealing surface assembly, and an expansion band is provided between two adjacent sealing plates. The bottom of the sealing plate is provided with a base plate, and a sealing steel plate is provided on the outer side of each of the multiple sealing plates. The base plate is set perpendicular to the sealing steel plate.

2. The detachable sealing structure for the inlet of a waste heat boiler according to claim 1, characterized in that: The expansion band is configured to be non-linear, and the expansion band is made of aluminum silicate fiber rope or aluminum silicate fiber.

3. The detachable sealing structure for the inlet of a waste heat boiler according to claim 1, characterized in that: The sealing plate is made of refractory castable and has metal anchors installed inside it.

4. The detachable sealing structure for the inlet of a waste heat boiler according to claim 1, characterized in that: It also includes multiple towing lugs, which are disposed on the side of the sealing steel plate away from the sealing plate; Several of the sealed steel plates are equipped with drag lugs.

5. The detachable sealing structure for the inlet of a waste heat boiler according to claim 1, characterized in that: It also includes an expansion joint disposed above the sealing surface assembly; The multiple sealing steel plates are connected by flanges, and the upper and lower ends of the sealing steel plates are respectively connected to the flanges at the expansion joint and the interface of the depletion furnace.

6. The detachable sealing structure for the inlet of a waste heat boiler according to claim 5, characterized in that: A sealing gasket is provided between the expansion joint and the sealing steel plate, and the sealing gasket is made of aluminum silicate fiber rope or aluminum silicate fiber.

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