Pulse combustion system for hot-dip galvanizing furnace

Abstract

The utility model provides a pulse combustion system for a hot-dip galvanizing furnace. The pulse combustion system comprises a natural gas combustion gun, a fixed connecting rod, a movable connecting rod and an air cylinder. The middle of the natural gas burning gun is hinged to the fixed connecting rod, the tail of the natural gas burning gun is hinged to the movable connecting rod, and the free end of a piston rod of the air cylinder is hinged to the bottom end of the movable connecting rod. The piston rod of the air cylinder ascends and descends to drive the movable connecting rod to ascend and descend to drive the natural gas burning gun to vertically swing around the middle hinge shaft. The front end muzzle of the natural gas burning gun swings up and down back and forth in the combustion chamber, so that the spraying direction of burning flames swings up and down back and forth in the combustion chamber and becomes movable and adjustable, almost all the space in the combustion chamber can be burnt by the flames, and the temperature and the thermal field in the combustion chamber are more uniform; and the temperature of the zinc liquid in the zinc pot is more uniform, and the hot-dip galvanizing quality and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse combustion systems for hot-dip galvanizing furnaces, and particularly relates to a pulse combustion system for a hot-dip galvanizing furnace. Background Art

[0002] The hot-dip galvanizing furnace is heated by natural gas, and its parameters are as follows: zinc pot size: length 11.0m × width 1.6m × depth 2.8m, zinc pot zinc capacity 306 tons. The hot-dip galvanizing furnace has an open-top long trough structure. The zinc pot is lowered from the open top until it squats in the trough cavity of the hot-dip galvanizing furnace. There is not a tight contact between the lateral outer wall surface of the zinc pot and the lateral inner wall surface of the hot-dip galvanizing furnace, but there is a gap of 30 cm - 50 cm wide between the two to form a sandwich cavity structure combustion chamber. The natural gas burners are installed on the furnace walls in the width and height directions of the two sides of the hot-dip galvanizing furnace and are arranged to bias to the right side, and the natural gas burners on the furnace walls in the width and height directions of the two sides are arranged diagonally. 3 - 5 natural gas burners on the furnace walls in the width and height directions are arranged at intervals from top to bottom in sequence.

[0003] At present, the natural gas burners are fixedly installed on the furnace walls in the width and height directions of the two sides of the hot-dip galvanizing furnace, and they are fixed and immovable during the combustion process after installation, resulting in the jet direction of the combustion flame also being fixed and immovable. The combustion flame always jets in the same direction. Such "rigidity" will inevitably lead to a high temperature in the place where the flame burns and a low temperature in the place where the flame does not burn, thereby resulting in an uneven thermal field in the combustion chamber, with high-temperature areas and low-temperature areas in the thermal field, and ultimately leading to an uneven temperature of the zinc liquid in the zinc pot, seriously affecting the quality and efficiency of hot-dip galvanizing.

[0004] Therefore, how to improve the pulse combustion system of the hot-dip galvanizing furnace, improve the uniformity of the thermal field in the combustion chamber where the natural gas burners burn, and improve the quality and efficiency of hot-dip galvanizing are technical problems that need to be urgently solved by those skilled in the art. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pulse combustion system for a hot-dip galvanizing furnace.

[0006] To solve the above technical problems, the technical solution provided by the utility model is as follows:

[0007] A pulse combustion system for a hot-dip galvanizing furnace includes a natural gas burner, and the natural gas burner is inserted into through holes on the furnace walls in the width and height directions of the two sides of the hot-dip galvanizing furnace;

[0008] The natural gas inlet on the natural gas burner is connected to the gas outlet of the natural gas supply pipe through a steel wire braided hose, and the air inlet on the natural gas burner is connected to the gas outlet of the air supply pipe through a steel wire braided hose. The steel wire braided hose is used to achieve a soft connection so that the natural gas burner can swing;

[0009] The fixed connecting rod is welded and fixed in a vertical posture on the outer surface of the outer steel plate on the furnace wall in the width and height direction of the hot-dip galvanizing furnace, and a plurality of hinged through holes are arranged on the fixed connecting rod. An intermediate hinged shaft is welded and fixed on the outer surface of the middle part of the natural gas burner, and the intermediate hinged shaft on the natural gas burner is inserted into the hinged through hole on the fixed connecting rod, and the movable end of the inserted intermediate hinged shaft is screwed with a nut through a threaded connection, so as to form an articulated connection between the middle part of the natural gas burner and the fixed connecting rod;

[0010] A rear hinge shaft is welded and fixed on the outer surface of the tail of the natural gas burner, and the rear hinge shaft on the natural gas burner is hingedly connected to the hinge through hole on the movable connecting rod, and the movable end of the rear hinge shaft after insertion is provided with a nut for preventing disengagement through a threaded connection sleeve, so as to form a hinged connection between the tail of the natural gas burner and the movable connecting rod;

[0011] The movable connecting rod is arranged in a vertical posture, and the cylinder barrel of the cylinder is fixed on the outer surface of the outer steel plate on the furnace wall in the width and height direction of the hot-dip galvanizing furnace. The top end of the piston rod of the cylinder is hingedly connected to the bottom end of the movable connecting rod, so that the piston rod of the cylinder can be lifted up and down, thereby driving the movable connecting rod to be lifted up and down, and then driving the natural gas burner to swing up and down around the middle hinge shaft.

[0012] Preferably, the fixed connecting rod and the movable connecting rod are in the shape of long strips.

[0013] Preferably, the cylinder is a double-acting piston rod type cylinder.

[0014] This application has achieved the following beneficial technical effects:

[0015] This application is provided with a linkage mechanism. Through the up-and-down movement of the piston rod of the cylinder, the piston rod drives the movable link to move up and down, and then the movable link drives the natural gas burner to swing up and down around the middle hinge shaft. The fixed link that remains stationary serves as the fixed support for the middle hinge shaft. In this way, the front muzzle of the natural gas burner swings back and forth in the combustion chamber (preferably with a maximum swing amplitude of 10 - 15° up and down, and the swing amplitude should not be too large). As a result, the spraying direction of the combustion flame is no longer fixed, and the spraying direction of the combustion flame swings back and forth in the combustion chamber and can be flexibly adjusted, so that the combustion flame no longer always sprays in the same direction, changing the original "rigid" state into an "active and adjustable" state, enabling almost all spaces in the combustion chamber, including the corners, to be heated by the swinging combustion flame back and forth. Furthermore, the temperature and thermal field in the combustion chamber become more uniform, and finally the temperature of the zinc liquid in the zinc pot also becomes more uniform, significantly improving the quality and efficiency of hot-dip galvanizing. Description of the Drawings

[0016] Figure 1 FIG. is a schematic structural diagram of a pulse combustion system for a hot-dip galvanizing furnace provided by an embodiment of the present application (to avoid confusion caused by the interpenetration of secondary lines and make it unclear, Figure 1 only the wire braided hose, natural gas supply pipe, and air supply pipe of the topmost natural gas burner are drawn, and the remaining natural gas burners are the same);

[0017] In the figure: 1 furnace wall in the width and height directions of the hot-dip galvanizing furnace, 101 outer steel plate, 102 heat insulation cotton layer;

[0018] 201 wire braided hose, 202 natural gas supply pipe (high-pressure rigid pipe), 203 air supply pipe (high-pressure rigid pipe);

[0019] 3 natural gas burner, 301 middle hinge shaft, 302 rear hinge shaft;

[0020] 4 fixed link, 5 movable link, 6 nut, 7 cylinder, 701 piston rod, 702 support plate used for fixing the cylinder barrel of the cylinder on the outer surface of the outer steel plate of the furnace wall in the width and height directions of the hot-dip galvanizing furnace. Detailed Embodiment

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "axial direction", "radial direction", "longitudinal direction", "lateral direction", "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "high", "low", "clockwise", "counterclockwise", "inner side", "outer side", "horizontal direction", "vertical direction", etc. is the orientation or positional relationship during actual use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0023] Refer to Figure 1 In [reference], the furnace wall 1 in the width and height directions of the hot-dip galvanizing furnace, the outer steel plate 101, the heat-insulating cotton layer 102; the wire-braided hose 201, the natural gas supply pipe 202, the air supply pipe 203; the natural gas burner 3, the middle hinge shaft 301, the rear hinge shaft 302; the fixed connecting rod 4, the movable connecting rod 5, the nut 6, the cylinder 7, the piston rod 701, and the support plate 702 used for fixing the cylinder barrel of the cylinder 7 on the outer surface of the outer steel plate 101 on the furnace wall 1 in the width and height directions of the hot-dip galvanizing furnace.

[0024] The present application provides a pulse combustion system for a hot-dip galvanizing furnace, including a natural gas burner 3, and the natural gas burner 3 is inserted into through holes on two furnace walls 1 in the width and height directions of the hot-dip galvanizing furnace;

[0025] The natural gas inlet on the natural gas burner 3 is communicated with the outlet of the natural gas supply pipe 202 through a wire-braided hose 201, and the air inlet on the natural gas burner 3 is communicated with the outlet of the air supply pipe 203 through a wire-braided hose 201. The wire-braided hose 201 is used to achieve flexible connection so that the natural gas burner 3 can swing and move;

[0026] The fixed connecting rod 4 is vertically welded and fixed on the outer surface of the outer steel plate 101 on the furnace wall 1 in the width and height directions of the hot-dip galvanizing furnace. A plurality of hinge through holes are provided on the fixed connecting rod 4. The middle hinge shaft 301 is welded and fixed on the outer surface of the middle part of the natural gas burner 3. The middle hinge shaft 301 on the natural gas burner 3 is inserted into the hinge through holes on the fixed connecting rod 4, and the movable end of the inserted middle hinge shaft 301 is screwed with a nut 6 through thread connection, so that the middle parts of the natural gas burners 3 arranged at intervals from top to bottom are all hinged and connected with the fixed connecting rod 4;

[0027] A rear hinge shaft 302 is welded and fixed on the outer surface of the tail of the natural gas burner 3, and the rear hinge shaft 302 on the natural gas burner 3 is hingedly connected to the hinge through hole on the movable connecting rod 5, and the movable end of the inserted rear hinge shaft 302 is provided with a nut 6 for preventing it from coming out through a threaded connection sleeve, so that the tail of the natural gas burner 3 is hingedly connected to the movable connecting rod 5;

[0028] The movable connecting rod 5 is arranged in a vertical posture, and the cylinder barrel of the cylinder 7 is fixed on the outer surface of the outer steel plate 101 on the furnace wall 1 in the width and height direction of the hot-dip galvanizing furnace. The top end of the piston rod 701 of the cylinder 7 is hingedly connected to the bottom end of the movable connecting rod 5, so that the piston rod 701 of the cylinder 7 can be lifted up and down, thereby driving the movable connecting rod 5 to lift up and down, and then driving the natural gas burner 3 to swing up and down around the middle hinge shaft 301.

[0029] In one embodiment of the present application, the fixed link 4 and the movable link 5 are both in the shape of long strips.

[0030] In one embodiment of the present application, the cylinder 7 is a double-acting piston rod type cylinder.

[0031] In the present application, the number of natural gas burners 3 is preferably 1-4. Figure 1 Three natural gas burners 3 are drawn.

[0032] In the present application, hot-dip galvanizing is one of the most effective means to delay environmental corrosion of steel materials. It is to immerse the steel products after cleaning and activation in molten zinc liquid, and through the reaction and diffusion between iron and zinc, a zinc alloy coating with good adhesion is plated on the surface of the steel products. Compared with other metal protection methods, the hot-dip galvanizing process has incomparable advantages in the protection characteristics of the combination of the physical barrier and electrochemical protection of the coating, the bonding strength between the coating and the substrate, the density, durability, maintenance-free and economy of the coating, and its adaptability to the shape and size of the product.

[0033] In this application, pulse combustion is a technology that controls the temperature of the furnace by controlling the combustion sequence and combustion time of the burners, and each burner can be adjusted and controlled separately. This control method has good dynamic performance, small temperature fluctuation, and fuel saving, and has been widely valued and applied.

[0034] The methods and devices not described in detail in the present invention are all prior art and will not be described in detail.

[0035] In this article, specific embodiments are used to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principles of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A pulse combustion system for a hot dip galvanizing furnace, characterized in that, It includes a natural gas burner, which is inserted into through holes on the furnace wall in two width and height directions of the hot dip galvanizing furnace; The natural gas inlet on the natural gas burner is connected to the gas outlet of the natural gas supply pipe through a steel wire braided hose, and the air inlet on the natural gas burner is connected to the gas outlet of the air supply pipe through a steel wire braided hose. The steel wire braided hose is used to achieve a soft connection so that the natural gas burner can swing; The fixed connecting rod is welded and fixed in a vertical posture on the outer surface of the outer steel plate on the furnace wall in the width and height direction of the hot-dip galvanizing furnace, and a plurality of hinged through holes are arranged on the fixed connecting rod. An intermediate hinged shaft is welded and fixed on the outer surface of the middle part of the natural gas burner, and the intermediate hinged shaft on the natural gas burner is inserted into the hinged through hole on the fixed connecting rod, and the movable end of the inserted intermediate hinged shaft is screwed with a nut through a threaded connection, so as to form an articulated connection between the middle part of the natural gas burner and the fixed connecting rod; A rear hinge shaft is welded and fixed on the outer surface of the tail of the natural gas burner, and the rear hinge shaft on the natural gas burner is hingedly connected to the hinge through hole on the movable connecting rod, and the movable end of the rear hinge shaft after insertion is provided with a nut for preventing disengagement through a threaded connection sleeve, so as to form a hinged connection between the tail of the natural gas burner and the movable connecting rod; The movable connecting rod is arranged in a vertical posture, and the cylinder barrel of the cylinder is fixed on the outer surface of the outer steel plate on the furnace wall in the width and height direction of the hot-dip galvanizing furnace. The top end of the piston rod of the cylinder is hingedly connected to the bottom end of the movable connecting rod, so that the piston rod of the cylinder can be lifted up and down, thereby driving the movable connecting rod to be lifted up and down, and then driving the natural gas burner to swing up and down around the middle hinge shaft.

2. The pulse combustion system for a hot dip galvanizing furnace according to claim 1, wherein The fixed connecting rod and the movable connecting rod are in the shape of long strips.

3. The pulse combustion system for a hot-dip galvanizing furnace according to claim 1, characterized in that The cylinder is a double-acting piston rod type cylinder.

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