Upper boiler barrel of boiler

Abstract

The upper boiler barrel comprises a barrel body, a front sealing head and a rear sealing head, an underwater pore plate parallel to an axis is arranged in the barrel body along the lower position of the axis, the left side and the right side of the underwater pore plate are respectively connected with a baffle which inclines upwards, the upper ends of the baffles are fixedly connected with the inner wall of the barrel body, and the lower ends of the baffles are fixedly connected with the lower end of the barrel body. Through holes are formed in positions, corresponding to the left and right baffles, of the barrel and are connected with the ascending pipe; a sealing plate is arranged at the front ends of the underwater pore plate and the two baffles, the lower edge of the sealing plate is lower than the underwater pore plate, a pore plate parallel to the underwater pore plate is arranged between the lower edge of the sealing plate and the front sealing head, and a through hole is formed in the position, corresponding to the pore plate, of the cylinder body and connected with a downcomer. According to the technical scheme, it can be ensured that a water-steam mixture entering from the ascending pipe can only flow into the lower half part of the cavity of the barrel firstly, then steam penetrates through the underwater pore plate and enters the upper half part of the cavity of the barrel upwards, first-time steam-water separation is achieved, and the water inlet of the descending pipe can be prevented from forming vortexes.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler equipment, in particular to an upper drum of a boiler. Background Art

[0002] The boiler drum, also known as the steam drum, is a cylindrical pressure vessel used in water-tube boilers for steam separation and steam purification, forming a water circulation loop and storing boiler water. Its primary function is to receive water from the economizer, separate it, and supply water to the circulation loop, delivering saturated steam to the superheater. The drum contains a certain amount of water, which provides a certain amount of heat and working fluid. This slows down steam pressure fluctuations during operating conditions and acts as a buffer when water supply and load are temporarily out of sync. The drum is equipped with internal devices for steam-water separation, steam cleaning, in-boiler dosing, and continuous blowdown to ensure steam quality. The steam-water separator separates saturated steam from water walls and minimizes the presence of fine water droplets in the steam. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a boiler upper drum with better steam-water separation effect.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a boiler upper drum, comprising a cylinder, a front head and a rear head, an underwater orifice plate parallel to the axis is provided in the cylinder at a position lower along the axis, the left and right sides of the underwater orifice plate are respectively connected to an upward inclined baffle, the upper end of the baffle is fixedly connected to the inner wall of the cylinder, and the cylinder is provided with through holes at positions corresponding to the left and right baffles, which are connected to the riser; a sealing plate is provided at the front end of the underwater orifice plate and the two baffles, and the lower edge of the sealing plate is lower than the underwater orifice plate, and a orifice plate parallel to the underwater orifice plate is provided between the lower edge of the sealing plate and the front head, and the cylinder is provided with a through hole at a position corresponding to the orifice plate, which is connected to the downcomer.

[0005] In one embodiment, a plurality of angle steels are spaced apart in the cylinder, and both ends of the angle steels are fixed to the inner wall of the cylinder by welding with flat steels. The angle steels are used to support and fix the underwater orifice plate.

[0006] In one embodiment, one end of the orifice plate is welded and fixed to the inner wall of the front head, and the other end is supported by an angle steel welded inside the cylinder.

[0007] In one embodiment, one end of the orifice plate is fixed to the inner wall of the front head by welding with flat steel, and the other end is supported by an angle steel welded inside the cylinder.

[0008] In one embodiment, the upper end of the baffle is fixed to the inner wall of the cylinder by welding with flat steel.

[0009] In one embodiment, a steam-water separation device is provided on the upward side of the inner wall of the cylinder.

[0010] In the present invention, the underwater orifice plate is coordinated with the baffles on the left and right sides to ensure that the water vapor mixture entering from the riser can only flow into the lower half of the cylinder cavity first, and then the steam passes through the underwater orifice plate upward into the upper half of the cylinder cavity, achieving the first steam-water separation. Since a perforated plate parallel to the underwater orifice plate is provided between the lower edge of the sealing plate and the front head, a through hole is provided at the position of the cylinder corresponding to the orifice plate to connect to the downcomer, which can further improve the steam-water separation effect and prevent the formation of vortices at the downcomer water inlet. A steam-water separation device is provided on the upward side of the cylinder inner wall to collect condensed water attached to the inner wall of the cylinder to achieve the second steam-water separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the overall structure of the upper drum in an embodiment of the present invention;

[0012] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of the front head;

[0013] Figure 3 Schematic diagram of the cross-sectional structure of the upper drum in an embodiment of the present invention;

[0014] Figure 4 Schematic diagram of the sealing plate structure in an embodiment of the present invention;

[0015] Figure 5 Schematic diagram of the orifice plate structure in an embodiment of the present invention;

[0016] The accompanying drawings are marked as follows: 1. cylinder; 2. front head; 3. rear head; 4. underwater orifice plate; 5. baffle; 6. angle steel; 7. sealing plate; 8. orifice plate; 9. steam-water separation device. DETAILED DESCRIPTION

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0018] It should be noted in advance that, in this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise expressly specified or limited, a first feature "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features not being in direct contact but through another feature between them.

[0019] like Figures 1 to 5 As shown, a boiler upper drum includes a cylinder 1, a front head 2, and a rear head 3. An underwater orifice plate 4 parallel to the axis and a plurality of angle steels 6 arranged at intervals are provided in the cylinder 1 at a position slightly below the axis. The two ends of the plurality of angle steels 6 are respectively fixed to the inner wall of the cylinder 1 by welding with flat steel. The plurality of angle steels 6 are used to provide support and fixation for the underwater orifice plate 4; the left and right sides of the underwater orifice plate 4 are respectively connected to an upwardly inclined baffle 5, the upper end of the baffle 5 is fixedly connected to the inner wall of the cylinder 1, and the cylinder 1 corresponds to the position of the left and right baffles 5. A through hole is provided to connect with the riser; a sealing plate 7 is provided at the front end of the underwater orifice plate 4 and the two baffles 5, the lower edge of the sealing plate 7 is lower than the underwater orifice plate 4, and a orifice plate 8 parallel to the underwater orifice plate 4 is provided between the lower edge of the sealing plate 7 and the front head 2, and a through hole is provided at the position of the cylinder 1 corresponding to the orifice plate 8 to connect with the downcomer; one end of the orifice plate 8 is directly welded and fixed to the inner wall of the front head 2 or fixed by flat steel, and the other end is supported by the angle steel 6 welded in the cylinder 1; a steam-water separation device 9 is provided on the upward side of the inner wall of the cylinder 1.

[0020] This embodiment uses the underwater orifice plate 4 in conjunction with the baffles 5 on both sides to ensure that the water vapor mixture entering from the riser can only flow into the lower half of the cavity of the cylinder 1 first. The steam then passes through the underwater orifice plate 4 upward into the upper half of the cavity of the cylinder 1, achieving the first steam-water separation. Because a perforated plate 8 parallel to the underwater orifice plate 4 is provided between the lower edge of the sealing plate 7 and the front head 2, the cylinder 1 is provided with a through hole at the position corresponding to the orifice plate 8 to connect to the downcomer, which can further improve the steam-water separation effect and prevent the formation of vortices at the downcomer water inlet. A steam-water separation device 9 is provided on the upward side of the inner wall of the cylinder 1 to collect condensed water attached to the inner wall of the cylinder 1, achieving the second steam-water separation.

[0021] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiments are better implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A boiler upper drum, comprising a drum body (1), a front head (2), and a rear head (3), characterized in that: An underwater orifice plate (4) parallel to the axis is provided in the cylinder (1) at a position slightly below the axis, and the left and right sides of the underwater orifice plate (4) are respectively connected to an upwardly inclined baffle (5), and the upper end of the baffle (5) is fixedly connected to the inner wall of the cylinder (1). The cylinder (1) is provided with through holes at positions corresponding to the left and right baffles (5) and connected to the riser; a sealing plate (7) is provided at the front end of the underwater orifice plate (4) and the two baffles (5), and the lower edge of the sealing plate (7) is lower than the underwater orifice plate (4); a orifice plate (8) parallel to the underwater orifice plate (4) is provided between the lower edge of the sealing plate (7) and the front head (2), and a through hole is provided at a position corresponding to the orifice plate (8) of the cylinder (1) and connected to the downcomer.

2. The boiler upper drum according to claim 1, characterized in that: A plurality of angle steels (6) are arranged at intervals in the cylinder (1), and both ends of the plurality of angle steels (6) are respectively fixed to the inner wall of the cylinder (1) by welding with flat steel. The plurality of angle steels (6) are used to support and fix the underwater orifice plate (4).

3. The boiler upper drum according to claim 2, characterized in that: One end of the orifice plate (8) is welded and fixed to the inner wall of the front head (2), and the other end is supported by an angle steel (6) welded inside the cylinder (1).

4. The boiler upper drum according to claim 2, characterized in that: One end of the orifice plate (8) is fixed to the inner wall of the front head (2) by welding with flat steel, and the other end is supported by an angle steel (6) welded inside the cylinder (1).

5. The boiler upper drum according to any one of claims 1 to 4, characterized in that: The upper end of the baffle (5) is fixed to the inner wall of the cylinder (1) by welding with flat steel.

6. The boiler upper drum according to any one of claims 1 to 4, characterized in that: A steam-water separation device (9) is provided on the upward side of the inner wall of the cylinder (1).

Images