Boiler damping device

Abstract

The utility model relates to a boiler damping device, and belongs to the technical field of waste heat boilers. Comprising a boiler and a maintenance frame. Maintenance frames are arranged on the two sides of the boiler, and installation guide rails parallel to the boiler are arranged on the maintenance frames. A base is slidably mounted on the mounting guide rail; a mounting plate which vertically extends upwards is arranged on the base, a mounting hole is formed in the mounting plate, an adjusting screw rod which is horizontally arranged is arranged in the mounting hole, and two nuts are screwed on the adjusting screw rod in a threaded manner; a bottom plate is arranged at the end, close to the boiler, of the adjusting screw, a top plate is arranged on the boiler, and springs are arranged between the bottom plate and the top plate. According to the boiler, the springs with the adjustable positions are arranged on the side of the boiler, vibration of the boiler is effectively reduced through the vibration reduction effect of the springs, meanwhile, aiming at the problem that vibration amplitudes generated at different positions of the boiler are different, the multiple sets of springs can be moved to the corresponding areas in a targeted mode so that the vibration at the positions can be reduced to the minimum amplitude in a targeted mode, and therefore the boiler vibration reduction effect is improved. The overall stability of the boiler is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat boiler technical field especially relates to a boiler damping device. BACKGROUND

[0002] In copper smelting process, the high-temperature sulfur-containing flue gas generated by the bottom blowing furnace smelting is exchanged heat through the waste heat boiler membrane wall and the convection tube bundle, and the heat is converted into saturated steam for power generation, and the waste heat is recovered. The waste heat boiler adopts forced water circulation, which is composed of a transition section, an upward flue, and a horizontally arranged convection zone. The heating surface of the transition section and the upward flue is welded by seamless pipes with a specification of 38*5mm, and the center distance of the pipes is 60mm. The normal working condition flue gas temperature of the upward flue area is 800℃-1000℃. The horizontally arranged zone is composed of a membrane water cooling wall, a slag retaining plate, a slag condensing pipe screen, and a convection tube bundle. The outlet flue gas temperature is controlled at 380±20℃.

[0003] Because the lower part of the furnace of the boiler is the bottom blowing furnace smelting reaction zone, the upper part of the smoke outlet is communicated with the transition section water cooling wall, and when running, the furnace is filled with continuously flowing smelting high-temperature flue gas, and the whole furnace space forms a gas flow field. When the static pressure of the furnace gas flow fluctuates, it will cause the furnace wall to vibrate. If the amplitude of the furnace negative pressure fluctuation is (29-294) Pa, even such a small pressure fluctuation, the excitation force received by the whole front wall will reach (12.75-127.49) N. Comprehensive analysis of the operation of the boiler, the furnace wall vibration has the following four reasons:

[0004] (1) Fluid dynamics; the furnace and the flue are equipped with various devices composed of a number of circular cross-section tube bundles, such as slag retaining plates, slag condensing pipe screens, and convection tube bundles. When the fluid flows around the circular cross-section tube bundle, "Karman" vortex will be generated in the flow field behind the tube bundle, causing the static pressure of the surrounding flow field to fluctuate at the same frequency. Adding anti-vibration partition is the main means to prevent "Karman" vortex vibration, and optimizing the gas flow distribution in front of the tube bundle is an important method to reduce vortex vibration. However, due to the high proportion of volatile dust in the bottom blowing furnace boiler (38%-47%), the tube bundle is severely slagged, and the installation of anti-vibration partition is limited.

[0005] (2) Combustion dynamics; the combustion process is often not a continuous constant pressure process. When the gas pressure around the flame fluctuates, the flame will swing, and the swing of the flame in turn affects the surrounding gas pressure, similar to a self-excited oscillation process; secondly, due to the uneven burning of fuel particles and small explosions, etc. Factors also form random negative pressure fluctuations. The frequency of the furnace negative pressure fluctuation caused by the instability of the flame or the small explosion of the particles is relatively low, generally below 10Hz. Therefore, the furnace wall vibration caused by combustion dynamics is inevitable, only the degree is different. Influenced by the bottom blowing furnace smelting process, it is currently impossible to make large process adjustments.

[0006] (3) The rigidity of the furnace wall is insufficient; the vibration of the furnace wall caused by combustion dynamics is inevitable, which requires the furnace wall to have a certain rigidity. The function of the rigid beam is to protect the furnace and flue from being damaged under the operating pressure or explosion condition of the furnace, that is, the rigidity of the furnace wall is improved by adding the rigid beam. If the rigidity of the rigid beam is insufficient or the guide fails, the design requirements cannot be met, and the furnace wall will vibrate seriously.

[0007] It is observed that the left and right water-cooled walls of the horizontal section of the waste heat boiler vibrate seriously during production, and the vibration is most serious in the 3-10 meter area at the tail of the left and right water-cooled walls, with a transverse amplitude of 10-15 mm. The vibration of the boiler body causes great harm, which can cause great fatigue stress on the rigid beam of the boiler, and also causes destructive stress on the heating surface in the back wall, and can cause pipe explosion in severe cases. Practical new type content

[0008] To solve or partially solve the problems in the related art, the utility model provides a boiler vibration reduction device, which aims to reduce the transverse vibration of the waste heat boiler.

[0009] The above-mentioned boiler vibration reduction device comprises a boiler and an overhaul rack. The two sides of the boiler are provided with overhaul racks. The overhaul racks are provided with mounting rails parallel to the boiler. The mounting rails are two and are located on the two sides of the boiler. A base is slidably mounted on the mounting rails. The bases are spaced apart and at least two. An installation plate vertically extending upward is arranged on the base. An installation hole is arranged on the installation plate. An adjusting screw horizontally arranged is arranged in the installation hole. Two nuts are threadedly connected to the adjusting screw. The two nuts are located on the two sides of the installation plate. A bottom plate is arranged on one end of the adjusting screw close to the boiler. A top plate is arranged on the boiler. A spring is arranged between the bottom plate and the top plate.

[0010] In some schemes, the mounting rail comprises a first connecting part and a second connecting part in the shape of T. The first connecting part is arranged on the second connecting part, and the first connecting part and the second connecting part are integrally formed. A first clamping groove is arranged on one side of the second connecting part close to the boiler.

[0011] In some schemes, a connecting hole is uniformly and spacedly arranged on one side of the base away from the boiler. A connecting screw is threadedly connected to the overhaul rack after penetrating through the connecting hole.

[0012] In some schemes, a second clamping groove matched with the shape of the first connecting part is arranged on the bottom of the base.

[0013] In some schemes, a scale is arranged on the top of the base, and a pointer matched with the scale is arranged on the top plate.

[0014] The technical scheme provided by the utility model can have the following beneficial effects:

[0015] The boiler damping device provided by the utility model can effectively reduce the vibration of the boiler through the damping effect of the springs, and can move a plurality of groups of springs to corresponding areas according to the vibration amplitudes generated by different positions of the boiler, so as to reduce the vibration of the positions to the minimum amplitude, thereby being beneficial to the stability of the whole boiler.

[0016] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other objects, features and advantages of the utility model will become more apparent from the following detailed description of exemplary embodiments of the utility model, taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views. In the utility model exemplary embodiments, like reference numbers are generally used to refer to like components.

[0018] Figure 1 is the structure diagram of the boiler damping device shown in the utility model embodiment;

[0019] Figure 2 is another structure diagram of the boiler damping device shown in the utility model embodiment;

[0020] Reference signs:

[0021] 1, boiler; 2, maintenance rack; 3, installation guide rail; 301, first connecting part; 302, second connecting part; 4, base; 5, installation plate; 6, adjusting screw; 7, nut; 8, bottom plate; 9, top plate; 10, spring; 11, connecting screw; 12, pointer. DETAILED DESCRIPTION

[0022] The utility model will be described in further detail below in combination with the drawings and specific embodiments, but the protection scope of the utility model is not limited to the content.

[0023] Please refer to Figure 1 and Figure 2 The utility model provides a kind of boiler damping device, including boiler 1, maintenance rack 2;The both sides of the boiler 1 are equipped with maintenance rack 2, and maintenance rack 2 is fixedly installed on ground.

[0024] The maintenance rack 2 is provided with installation guide rails 3 parallel to the boiler 1, that is, the guide rails are arranged along the length direction of the boiler 1, the installation height of the boiler 1 matches the height of the boiler 1, the installation guide rails 3 are two and are respectively located on the two sides of the boiler 1; the installation guide rails 3 are slidably provided with bases 4, and the bases 4 are provided in at least two, the number of the bases 4 can be set according to the length of the boiler 1 and the number of vibration points, more bases 4 can be provided at the points with large vibration amplitudes, and fewer bases 4 can be provided at the areas with small vibration amplitudes, or the bases 4 can be uniformly and spacedly provided; the base 4 is provided with an installation plate 5 extending vertically upward, the installation plate 5 is provided with an installation hole, the installation hole is provided with an adjusting screw 6 arranged horizontally, the adjusting screw 6 is threadedly connected with two nuts 7, and the two nuts 7 are respectively located on the two sides of the installation plate 5; the end of the adjusting screw 6 close to the boiler 1 is provided with a bottom plate 8, the boiler 1 is provided with a top plate 9, and the bottom plate 8 and the top plate 9 are provided with a spring 10.

[0025] In use, according to the vibration points of the boiler 1, the base 4 is slid to the corresponding position, then according to the vibration amplitude of the relevant points, the nut 7 close to the boiler 1 is rotated to adjust the extension length of the adjusting screw 6, so as to adjust the spring force of the spring 10 on the corresponding points of the boiler, after adjustment, the nut 7 away from the boiler 1 is tightened, so that the two nuts 7 clamp the base 4, thereby fixing the position of the adjusting screw 6.

[0026] In this way, when the boiler 1 vibrates, the spring 10 can be used to damp the boiler 1, effectively reducing the vibration of the boiler 1 and ensuring the stable and safe operation of the boiler 1.

[0027] In some specific embodiments, the installation guide rail 3 comprises a first connecting part 301 in the shape of T and a second connecting part 302 in the shape of a plate; the first connecting part 301 is arranged on the second connecting part 302, and the first connecting part 301 and the second connecting part 302 are integrally formed; the second connecting part 302 is provided with a first clamping groove close to one side of the boiler 1.

[0028] In installation, the first clamping groove clamps the side edge of the maintenance rack 2, so as to firmly connect the installation guide rail 3 with the maintenance rack 2, the installation guide rail 3 is convenient to install, and the installation efficiency of the installation guide rail 3 is effectively improved, meanwhile, the first clamping groove can tightly connect the side of the installation guide rail 3 close to the boiler 1 with the maintenance rack 2 and will not cause problems such as loosening, and compared with the design of bolt connection, the connection is more firm.

[0029] In the embodiment, the base 4 is uniformly spaced apart from the side of the boiler 1, and the connecting holes are arranged on the base 4, the connecting screws 11 are screwed with the maintenance frame 2 after penetrating through the connecting holes, and the connecting strength between the installation guide rail 3 and the maintenance frame 2 is further improved, and the technical problem that the installation guide rail 3 is displaced due to vibration after long time operation is effectively avoided.

[0030] In some specific embodiments, the bottom of the base 4 is provided with a second clamping groove matched with the shape of the first connecting part 301, and the first connecting part 301 is clamped into the second clamping groove, so as to realize the sliding connection between the base 4 and the installation guide rail 3.

[0031] In some specific embodiments, the top of the base 4 is provided with a scale, the top plate 9 is provided with a pointer 12 matched with the scale, the root of the pointer 12 is fixedly connected with the top plate 9, and the top end is bent, when the boiler 1 vibrates, the pointer 12 swings on the scale, so that the staff can judge the vibration amplitude of the boiler 1 through the swing amplitude of the pointer 12 on the scale, so as to adjust the spring force of the spring 10 at the current position in time, so that the boiler 1 can be uniformly stressed and unloaded at different positions, and the stability of the boiler 1 in operation and the safety of the structure are beneficial.

[0032] The above has described the embodiments of the utility model, the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used in this paper is intended to best explain the principles, practical application or improvement of the technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed in this paper.

Claims

1. A boiler damping device, comprising a boiler (1), an inspection rack (2); both sides of the boiler (1) are provided with an inspection rack (2), characterized in that, The installation guide rail (3) parallel to the boiler (1) is arranged on the inspection rack (2), the installation guide rail (3) has two, which are respectively located on both sides of the boiler (1); the base (4) is slidably installed on the installation guide rail (3), and the base (4) is spaced apart; the installation plate (5) extending vertically upward is arranged on the base (4), the installation hole is arranged on the installation plate (5), the adjusting screw (6) arranged horizontally is arranged in the installation hole, the two nuts (7) are threadedly connected on the adjusting screw (6), and the two nuts (7) are respectively located on both sides of the installation plate (5); the bottom plate (8) is arranged on one end of the adjusting screw (6) close to the boiler (1), the top plate (9) is arranged on the boiler (1), and the spring (10) is arranged between the bottom plate (8) and the top plate (9).

2. The boiler damping device according to claim 1, characterized in that: The installation guide rail (3) comprises a first connecting portion (301) and a second connecting portion (302) in a T shape; the first connecting portion (301) is arranged on the second connecting portion (302), and the first connecting portion (301) and the second connecting portion (302) are integrally formed; the second connecting portion (302) is provided with a first clamping groove on one side close to the boiler (1).

3. The boiler damping device according to claim 2, characterized in that: The base (4) is uniformly and spaced apart from the side away from the boiler (1) and is provided with a connecting hole, and the connecting screw (11) passes through the connecting hole and is threadedly connected with the inspection rack (2).

4. The boiler damping device according to claim 2, characterized in that: The bottom of the base (4) is provided with a second clamping groove matched with the shape of the first connecting portion (301).

5. The boiler damping device according to claim 1, characterized in that: The top of the base (4) is provided with a scale, and the top plate (9) is provided with a pointer (12) matched with the scale.

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