Boiler with water level stabilizing function

Abstract

The utility model relates to the technical field of boilers, in particular to a boiler with a water level stabilizing function, which comprises a boiler barrel, a water level stabilizer is mounted on the outer wall of one side of the boiler barrel, and three water-cooling pipe walls, namely a first water-cooling wall pipe, a second water-cooling wall pipe and a third water-cooling pipe wall, are connected to two sides of the bottom of the boiler barrel. The bottom ends of the first water-cooled wall tube, the second water-cooled wall tube and the third water-cooled wall tube are connected with left and right headers, the bottoms of the left and right headers are connected with header blow-off pipe seats, the bottom of the boiler barrel is connected with a downcomer, and the bottom end of the downcomer is connected with the left and right headers. According to the boiler with the water level stabilizing function, the water level can be stabilized through the water level stabilizer, a water circulation system of the boiler can be controlled by keeping the water level, and stable and normal operation of the system is ensured. If the water level is too high or too low, the normal working performance of the boiler can be affected, the pressure and temperature of the boiler can be controlled, the situation of too high or too low temperature is avoided, and it is ensured that the boiler operates within a safe range.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a boiler with a water level stabilization function. Background Art

[0002] As an important energy conversion equipment, boilers are widely used in industries, electricity, heating, etc. However, boilers often face the problem of water level fluctuations during operation, which not only affects the operating efficiency of the boiler, but may also cause safety accidents.

[0003] If the boiler water level is too high, it will affect the steam-water separation effect of the steam-water separation device, increase the humidity of the saturated steam, and at the same time reduce the steam space, which will increase the water content of the steam, increase the salt content of the steam, and deteriorate the quality, causing salt accumulation in the superheater, overheating, and scaling of the turbine flow path. Utility Model Content

[0004] The utility model aims to provide a boiler with a water level stabilization function to solve the problem in the above-mentioned background technology that the boiler water level is too high, which will affect the steam-water separation effect of the steam-water separation device, increase the humidity of the saturated steam, and reduce the steam space at the same time, which will increase the water content of the steam, increase the salt content of the steam, deteriorate the quality, and cause salt accumulation in the superheater, overheating and scaling of the turbine flow part.

[0005] To achieve the above-mentioned purpose, the utility model provides a boiler with a water level stabilization function, including a boiler drum, a water level stabilizer is installed on one side outer wall of the boiler drum, three water-cooled tube walls are connected to both sides of the bottom of the boiler drum, namely a first water-cooled wall tube, a second water-cooled wall tube and a third water-cooled tube wall, the bottom ends of the first water-cooled wall tube, the second water-cooled wall tube and the third water-cooled tube wall are connected to left and right collecting boxes, the bottoms of the left and right collecting boxes are connected to collecting box sewage pipe seats, the bottom of the boiler drum is connected to a downcomer, and the bottom ends of the downcomer are connected to the left and right collecting boxes.

[0006] Preferably, a sewage discharge device is installed on the inner bottom surface of the boiler drum, and the bottom of the sewage discharge device is connected to a boiler drum sewage discharge pipe seat.

[0007] Preferably, the pipe diameters of the left and right headers are larger than the pipe diameter of the water-cooling pipe wall.

[0008] Preferably, a water level gauge pipe seat is installed on the outer wall of the boiler drum near the water level stabilizer, and the water level stabilizer is welded to the water level gauge pipe seat. The water level stabilizer is a small closed container with holes, which avoids the influence of water level fluctuations inside the boiler on the water level, enables the water level gauge to work independently and stably, and ensures the normal and safe operation of the boiler.

[0009] Preferably, a plurality of threaded smoke pipes are installed inside the drum, a smoke inlet is installed at one end of the threaded smoke pipe, and a smoke outlet is installed at the other end of the threaded smoke pipe.

[0010] Preferably, a steam-water separator is installed above the interior of the boiler drum.

[0011] Preferably, the first water-cooled wall tubes, the second water-cooled wall tubes and the third water-cooled wall tubes are arranged at equal intervals.

[0012] Preferably, hanging ears are installed at both ends of the top of the drum.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the boiler with water level stabilization function, the water level can be stabilized by the water level stabilizer. Maintaining the water level can control the water circulation system of the boiler to ensure the stability and normal operation of the system. If the water level is too high or too low, it will affect the normal performance of the boiler. The pressure and temperature of the boiler can be controlled to avoid excessively high or low conditions, ensuring that the boiler operates within a safe range. It can ensure that when a boiler fails, water and pressure are discharged in time to avoid serious threats to safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a side view structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the top structure of the utility model.

[0018] The meaning of each number in the figure is:

[0019] 1. Boiler drum; 2. Water level stabilizer; 21. Water tank; 3. Steam-water separator; 4. Threaded smoke pipe; 5. First water-cooled wall tube; 6. Second water-cooled wall tube; 7. Downcomer; 8. Third water-cooled tube wall; 9. Sewage discharge device; 10. Boiler drum sewage pipe seat; 11. Left and right headers; 12. Header sewage pipe seat. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides a boiler with a water level stabilization function, such as Figure 1-Figure 3 As shown, it includes a boiler drum 1, a water level stabilizer 2 is installed on one side outer wall of the boiler drum 1, three water-cooled tube walls are connected to both sides of the bottom of the boiler drum 1, which are the first water-cooled wall tube 5, the second water-cooled wall tube 6 and the third water-cooled tube wall 8, the bottom ends of the first water-cooled wall tube 5, the second water-cooled wall tube 6 and the third water-cooled tube wall 8 are connected to left and right headers 11, the bottoms of the left and right headers 11 are connected to header drain pipe seats 12, the bottom of the boiler drum 1 is connected to a downcomer 7, and the bottom ends of the downcomer 7 are connected to the left and right headers 11.

[0022] In this embodiment, a sewage discharge device 9 is installed on the inner bottom surface of the boiler drum 1, and the bottom of the sewage discharge device 9 is connected to a boiler drum sewage discharge pipe seat 10 for performing sewage discharge operations on the boiler drum 1. The sewage discharge device 9 includes a collecting bin, and a sewage suction port is provided on the top of the collecting bin for sewage to enter, and the bottom end of the collecting bin is connected to the boiler drum sewage discharge pipe seat 10.

[0023] Specifically, the pipe diameters of the left and right headers are larger than the pipe diameter of the water-cooling pipe wall, which facilitates the transportation of water.

[0024] Furthermore, a water level gauge pipe seat is installed on the outer wall of the drum 1 near the water level stabilizer 2, and the water level stabilizer 2 is welded on the water level gauge pipe seat. The water level stabilizer 2 is a small closed container with holes. The outer side of the water level stabilizer 2 is connected to a water tank 21. The water level stabilizer 2 avoids the influence of the internal water level fluctuation of the boiler on the water level, so that the water level gauge can work independently and stably, ensuring the normal and safe operation of the boiler. The normal water level during the operation of the boiler is generally about 30mm below the center line of the main drum. The water level is closely related to the change of load. When the load increases, the water level should be kept lower than the normal water level; when the load decreases, the water level should be kept higher than the normal water level. Because when the load increases, due to the decrease in steam pressure, the vaporization is enhanced, and the water volume expands, the water level rises instantly at the beginning, but if the water supply is not increased in time, a serious water shortage will occur due to the increase in evaporation. On the other hand, in order to prevent the phenomenon of water entrainment caused by the increase of vaporization intensity and the acceleration of steam flow speed, the water level must be kept lower than the normal water level, so that the distance between the water level and the steam-water separator can be larger, which reduces the moisture in the steam and ensures the quality of the steam. On the contrary, when the load is reduced, due to the increase of steam pressure and the decrease of vaporization intensity, the water level will drop at the beginning and then rise (without reducing the water supply). At this time, the water supply should be reduced and the water level should be kept slightly higher than the normal water level. When the boiler load increases suddenly, the water level in the furnace will rise suddenly, so at low load, a slightly lower water level should be maintained. At full load, a slightly higher water level should be maintained to prevent the water level from dropping too much when the load drops suddenly. It must be pointed out that the water level should operate within the allowable range and should not change frequently within this range. The operator must monitor the water level frequently and keep it as stable as possible.

[0025] Furthermore, a plurality of threaded smoke tubes 4 are installed inside the boiler drum 1. A smoke inlet is installed at one end of the threaded smoke tube 4, and a smoke outlet is installed at the other end of the threaded smoke tube 4 for the entry and discharge of smoke.

[0026] Furthermore, a steam-water separator 3 is installed above the interior of the drum 1 for steam-water separation.

[0027] Furthermore, the first water-cooled wall tubes 5 , the second water-cooled wall tubes 6 and the third water-cooled wall tubes 8 are arranged at equal intervals to ensure that the water in the boiler drum 1 is evenly transported to the left and right headers 11 .

[0028] Furthermore, hanging ears are installed at both ends of the top of the drum 1 to facilitate the lifting operation.

[0029] When the boiler with water level stabilization function of the utility model is used, at the beginning of the work, the boiler is in a normal starting state, and the water level in the drum 1 remains stable. When the boiler load increases, the steam pressure increases, and the steam-water mixture enters the drum 1. The steam-water mixture flows upward in the drum 1, and at the same time drives the water in the drum 1 to flow upward. The steam-water mixture is separated into steam and water by the steam-water separator 3, and the separated steam is discharged through the smoke outlet, and the separated water enters the left and right headers 11 through the third water-cooled tube wall 8. The left and right headers 11 receive water from the third water-cooled tube wall 8, and cool it through the first water-cooled wall tube 5, the second water-cooled wall tube 6 and the third water-cooled tube wall 8. The cooled water is discharged through the header sewage pipe seat 12 connected to the bottom of the left and right headers 11, and new water enters the drum 1 through the sewage device 9 for replenishment. When the boiler load decreases, the steam pressure decreases, the flow speed of the steam-water mixture in the drum 1 slows down, and the water level rises. When the water level rises to a certain level, the water level stabilizer 2 starts to work and keeps the water level of the boiler stable by adjusting the water level. The water level stabilizer 2 uses a small, perforated sealed container to avoid the influence of the water level fluctuation inside the boiler on the water level, so that the water level gauge can work independently and stably. During the whole process, the sewage discharge device 9 always maintains the sewage discharge operation of the drum 1 to ensure the clean water quality in the drum 1.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A boiler with a water level stabilization function, comprising a boiler drum (1), characterized in that: A water level stabilizer (2) is installed on one side outer wall of the boiler drum (1); three water-cooling tube walls are connected to both sides of the bottom of the boiler drum (1), namely a first water-cooling wall tube (5), a second water-cooling wall tube (6) and a third water-cooling tube wall (8); the bottom ends of the first water-cooling wall tube (5), the second water-cooling wall tube (6) and the third water-cooling tube wall (8) are connected to left and right headers (11); the bottoms of the left and right headers (11) are connected to header drain pipe seats (12); the bottom of the boiler drum (1) is connected to a downcomer (7); the bottom ends of the downcomer (7) are connected to the left and right headers (11).

2. The boiler with water level stabilization function according to claim 1, characterized in that: A sewage discharge device (9) is installed on the inner bottom surface of the boiler drum (1), and the bottom of the sewage discharge device (9) is connected to a boiler drum sewage discharge pipe seat (10).

3. The boiler with water level stabilization function according to claim 1, characterized in that: The pipe diameters of the left and right headers are larger than the pipe diameter of the water-cooling pipe wall.

4. The boiler with water level stabilization function according to claim 1, characterized in that: A water level gauge pipe seat is installed on the outer wall of the drum (1) near the water level stabilizer (2). The water level stabilizer (2) is welded to the water level gauge pipe seat. The water level stabilizer (2) is a small closed container with holes. The outer side of the water level stabilizer (2) is connected to a water tank (21). The water level stabilizer (2) avoids the influence of the internal water level fluctuation of the boiler on the water level, so that the water level gauge can work independently and stably, thereby ensuring the normal and safe operation of the boiler.

5. The boiler with water level stabilization function according to claim 1, characterized in that: A plurality of threaded smoke pipes (4) are installed inside the boiler drum (1), one end of the threaded smoke pipe (4) is installed with a smoke inlet, and the other end of the threaded smoke pipe (4) is installed with a smoke outlet.

6. The boiler with water level stabilization function according to claim 1, characterized in that: A steam-water separator (3) is installed above the interior of the boiler drum (1).

7. The boiler with water level stabilization function according to claim 1, characterized in that: The first water-cooling wall tubes (5), the second water-cooling wall tubes (6) and the third water-cooling tube wall (8) are arranged at equal intervals.

8. The boiler with water level stabilization function according to claim 1, characterized in that: Hanging ears are installed at both ends of the top of the drum (1).

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