Device for eliminating white steam and recycling condensed water in flash steam of boiler blowdown flash tank

Abstract

The utility model discloses a device for recovering condensate water through white elimination of flash steam of a boiler blow-off flash tank, and belongs to the technical field of boiler blow-off white elimination. The device comprises a condensation shell, a first partition plate and a second partition plate are arranged on the left side and the right side in the condensation shell respectively, a condensation cavity is formed between the first partition plate and the second partition plate in the condensation shell, and a plurality of steam baffling pore plates are connected to the inner wall of the condensation cavity from left to right. A plurality of independent condensation chambers are formed between the first partition plate and the adjacent steam baffling pore plate, between every two adjacent steam baffling pore plates and between the second partition plate and the adjacent steam baffling pore plate, and a flash steam inlet pipe and a white elimination outlet pipe are arranged above the condensation chambers at the two ends of the condensation shell respectively. The cooling pipe penetrates through the left side and the right side of the condensation shell, the first partition plate, the steam baffling pore plates and the second partition plate. According to the utility model, the equipment input is reduced, the operation is simple, and the condensate water can be recovered and utilized while the white elimination treatment is carried out.

Description

Technical Field

[0001] This utility model belongs to the field of boiler blowdown whitening technology, specifically relating to a device for eliminating whitening and recovering condensate from flash steam in a boiler blowdown expansion tank. Background Technology

[0002] During boiler operation, periodic blowdown is required. After the boiler's blowdown volume is increased and its pressure reduced, a large amount of low-pressure steam, known as flash steam, is rapidly released. This flash steam has very little recovery value and is often discharged into the atmosphere in power plants, self-owned power stations, and industrial production. However, according to environmental protection requirements, exhaust gas must be treated to remove white residue. Existing white residue removal technologies mainly include steam reheating or steam cooling. However, steam reheating requires energy consumption for heating, which is energy waste, and also requires investment in corresponding equipment, resulting in high economic costs and a disproportionate investment to recovery. Steam cooling requires investment in corresponding equipment and cooling personnel for heat exchange, and the amount of cooling water recovered is small, making the economic costs too high, and the investment to recovery also disproportionate. Furthermore, regardless of which solution is adopted, it involves many supporting equipment, complex systems, large equipment footprints, and high site requirements. Utility Model Content

[0003] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a device for recovering condensate from flash steam in boiler blowdown expansion tanks. This invention reduces equipment investment, is simple to operate, and can recover and utilize condensate during the whitening process.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] This utility model provides a device for recovering condensate from flash steam in a boiler blowdown expansion vessel. The device comprises a condensing shell, with a first partition and a second partition respectively disposed on the left and right sides inside the condensing shell. A condensing chamber is formed between the first and second partitions inside the condensing shell. Multiple steam baffles are connected from left to right on the inner wall of the condensing chamber, with the outer contours of the steam baffles completely connected to the inner wall of the condensing chamber. This forms multiple independent condensing chambers between the first partition and adjacent steam baffles, between two adjacent steam baffles, and between the second partition and adjacent steam baffles. A flash steam inlet pipe and a condensate removal outlet pipe are respectively disposed above the condensing chambers at both ends of the condensing shell. A condensate outlet pipe is disposed on the lower side of each condensing chamber, connected to a cooling pipe from the outside of the condensing shell. The cooling pipe penetrates the left and right sides of the condensing shell, the first partition, each steam baffle, and the second partition, cooling the steam entering the condensing chamber through the low temperature of the cooling pipe itself.

[0006] Furthermore, the steam baffle plate is composed of a baffle plate and an orifice plate. The baffle plate is a solid structure and is used to block flash steam. The cooling pipe passes through the baffle plate. The orifice plate has multiple openings evenly distributed, allowing flash steam to pass through the openings of the orifice plate.

[0007] Furthermore, the height of the orifice plate is 1 / 3 to 1 / 4 of the overall height of the steam baffle orifice plate.

[0008] Furthermore, the orifice plate of the steam baffle plate closest to the flash steam inlet pipe is located below, and the orifice plate of the next steam baffle plate is located above. Following this pattern, the orifice plates of all the steam baffle plates are arranged alternately, one below and one above, so that the flash steam can flow in a zigzag pattern in the condensation chamber.

[0009] Furthermore, the eye opening is a φ20 circular hole.

[0010] Furthermore, all the condensate outlet pipes are connected to a main recovery pipe connected to the condensate recovery device, and an electric valve is installed on the main recovery pipe.

[0011] Furthermore, ultrasonic level sensors are installed in both the condensing chamber where the flash steam inlet pipe is located and in one of the middle condensing chambers. The ultrasonic level sensors are positioned no higher than 1 / 2 the height of the orifice plate located on the lower side.

[0012] Furthermore, cooling air or cooling water is introduced into the cooling pipe.

[0013] Furthermore, the condenser shell, the first baffle, the second baffle, the steam baffle plate, the flash steam inlet pipe, the whitening outlet pipe, the cooling pipe, and the condensate outlet pipe are all made of corrosion-resistant stainless steel.

[0014] The beneficial effects of this utility model.

[0015] The whitening method of this utility model is based on natural cooling. Compared with the existing technology, it reduces the amount of equipment investment, is simple to operate without manual labor, and has a higher tolerance for workers' skills. When the boiler discharges wastewater and generates flash steam, the flash steam enters the utility model through the connecting pipe and can be naturally cooled to eliminate whitening. At the same time as the flash steam is treated to eliminate whitening, condensate is generated. The condensate then enters the condensate recovery device for recycling and reuse, thus achieving energy-saving effect. Attached Figure Description

[0016] To make the technical problems solved, the technical solutions, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a utility model Figure 1 A schematic diagram of the steam baffle plate structure in the AA direction section.

[0019] Figure 3 This is a utility model Figure 1 A schematic diagram of the steam baffle plate structure in the BB direction.

[0020] Figure 4 This is a schematic diagram of the working connection structure of this utility model.

[0021] The markings in the diagram are as follows: 1 is the condenser shell, 2 is the first baffle, 3 is the second baffle, 4 is the steam baffle plate, 5 is the condensation chamber, 6 is the flash steam inlet pipe, 7 is the whitening outlet pipe, 8 is the condensate outlet pipe, 9 is the cooling pipe, 10 is the baffle plate, 11 is the orifice plate, 12 is the eyelet, 13 is the main recovery pipe, 14 is the electric valve, 15 is the ultrasonic level sensor, 16 is the drain expansion container, and 17 is the connecting pipe. Detailed Implementation

[0022] As shown in the accompanying drawings, this embodiment provides a device for recovering condensate from flash steam in a boiler blowdown expansion vessel. The device includes a condenser shell 1, with a first partition 2 and a second partition 3 respectively arranged on the left and right sides inside the condenser shell 1. A condensation chamber is formed inside the condenser shell 1 between the first partition 2 and the second partition 3, and the condensation treatment is carried out in the condensation chamber.

[0023] Multiple steam baffles 4 are connected from left to right on the inner wall of the condensation chamber. The steam baffles 4 are composed of baffles 10 and orifice plates 11.

[0024] The baffle 10 is a solid structure. The baffle 10 is used to block flash steam, change the flow direction of flash steam, and can also allow some of the condensate formed by condensation to adhere to the wall and flow down.

[0025] The height of the orifice plate 11 is 1 / 3 to 1 / 4 of the overall height of the steam baffle orifice plate 4. Multiple φ20 round orifice openings 12 are evenly distributed on the orifice plate 11, and flash steam can pass through the orifice openings 12 of the orifice plate 11.

[0026] The outer contour of the steam baffle plate 4 is completely connected to the inner wall of the condensing chamber, so that multiple independent condensing chambers 5 are formed between the first baffle plate 2 and the adjacent steam baffle plate 4, between two adjacent steam baffle plates 4, and between the second baffle plate 3 and the adjacent steam baffle plate 4.

[0027] The condenser shell 1 has a flash steam inlet pipe 6 and a whitening outlet pipe 7 above the condensation chambers 5 at both ends. The flash steam inlet pipe 6 is connected to the connecting pipe 17 after the blowdown of the blowdown expansion tank 16 via a flange, allowing flash steam to enter the condenser shell 1 from the flash steam inlet pipe 6. The diameter of the flash steam inlet pipe 6 is larger than the diameter of the connecting pipe 17. The small amount of steam remaining after whitening is discharged to the atmosphere from the whitening outlet pipe 7.

[0028] Cooling pipe 9 is connected from the outside of condenser shell 1. Cooling air or cooling water is introduced into cooling pipe 9. Cooling pipe 9 passes through the left and right sides of condenser shell 1, the first partition 2, the baffle 10 of each steam baffle plate 4 and the second partition 3. The low temperature of the cooling pipe 9 itself cools the steam entering the condenser chamber.

[0029] The orifice plate 11 of the steam baffle 4 closest to the flash steam inlet pipe 6 is located at the bottom, and the orifice plate 11 of the next steam baffle 4 is located at the top. Following this pattern, all the orifice plates 11 of the steam baffle 4 are arranged alternately, one above the other, so that the flash steam can flow in a zigzag pattern within the condensation chamber (the flow direction of the flash steam is as follows). Figure 1 (As shown by the arrow), extending the cooling path allows for more thorough cooling and whitening removal.

[0030] Each condenser housing 1 has a condensate outlet pipe 8 on the lower side of each condensation chamber 5. All condensate outlet pipes 8 are connected to a main recovery pipe 13 connected to a condensate recovery device, collecting the condensed water from the main recovery pipe 13 into the condensate recovery device. An electric valve 14 is installed on the main recovery pipe 13. Since the condensate is generated slowly, the electric valve 14 can be closed during the collection process, allowing the condensate to remain in the main recovery pipe 13. After a certain period of time, the electric valve 14 can be opened for centralized recovery.

[0031] To prevent condensate from remaining at excessively high levels for extended periods, ultrasonic level sensors 15 are installed in both the condensing chamber 5 containing the flash steam inlet pipe 6 and another condensing chamber 5 in the middle. The ultrasonic level sensors 15 are positioned no higher than half the height of the orifice plate 11 located on the lower side. The signal from the ultrasonic level sensor is automatically interlocked with the electric valve 14. When the condensate level reaches the height indicated by the ultrasonic level sensor 15, the sensor sends an opening signal to the electric valve 14, automatically discharging the condensate and achieving automatic condensate recovery.

[0032] It should be noted that the condenser shell 1, first baffle 2, second baffle 3, steam baffle plate 4, flash steam inlet pipe 6, whitening outlet pipe 7, cooling pipe 9, and condensate outlet pipe 8 of this device must all be made of corrosion-resistant stainless steel, such as 022Cr17Ni12Mo2 (SUS316L), and carbon steel cannot be used (the purpose is to prevent oxidation corrosion at the contact points between condensate and carbon steel, as the corrosion products FeO(OH) and Fe2O3·H2O will clog the orifice 12 or condensate outlet pipe 8). Furthermore, since the condensate generated by the flash steam is clean water, even if the orifice plate 11 of the steam baffle plate 4 is at the bottom, the condensate left from the baffle plate 10 will not clog the orifice plate 11.

[0033] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A device for recovering condensed water by white smoke elimination of flash steam of a boiler blowdown flash tank, characterized by, The system includes a condenser shell (1), with a first partition (2) and a second partition (3) respectively disposed on the left and right sides inside the condenser shell (1). A condensation chamber is formed inside the condenser shell (1) between the first partition (2) and the second partition (3). Multiple steam baffle plates (4) are connected from left to right on the inner wall of the condensation chamber. The outer contour of the steam baffle plates (4) is completely connected to the inner wall of the condensation chamber, so that there are gaps between the first partition (2) and the adjacent steam baffle plates (4), between two adjacent steam baffle plates (4), and between the second partition (3) and the adjacent steam baffle plates (4). Multiple independent condensing chambers (5) are formed. The condensing shell (1) is provided with a flash steam inlet pipe (6) and a whitening outlet pipe (7) above the condensing chambers (5) at both ends. The condensing shell (1) is provided with a condensate outlet pipe (8) on the lower side of each condensing chamber (5). A cooling pipe (9) is connected from the outside of the condensing shell (1). The cooling pipe (9) passes through the left and right sides of the condensing shell (1), the first partition (2), each of the steam baffle plates (4) and the second partition (3). The low temperature of the cooling pipe (9) itself cools the steam entering the condensing chamber.

2. A device for recovering condensed water by white steam elimination of a boiler blowdown flash tank according to claim 1, characterized in that, The steam baffle plate (4) is composed of a baffle plate (10) and an orifice plate (11). The baffle plate (10) is a solid structure and is used to block flash steam. The cooling pipe (9) passes through the baffle plate (10). The orifice plate (11) has multiple openings (12) evenly distributed on it, and the flash steam can pass through the openings (12) of the orifice plate (11).

3. A device for recovering condensed water by white steam elimination of a boiler blowdown flash tank according to claim 2, characterized in that, The height of the orifice plate (11) is 1 / 3 to 1 / 4 of the overall height of the steam baffle orifice plate (4).

4. A device for recovering condensed water by white smoke elimination of flash steam of a boiler blowdown flash tank according to claim 2, characterized in that, The orifice plate (11) of the steam baffle plate (4) near the flash steam inlet pipe (6) is located below, and the orifice plate (11) of the next steam baffle plate (4) is located above. Following this pattern, the orifice plates (11) of all the steam baffle plates (4) are arranged alternately at the bottom and top, so that the flash steam can flow in a zigzag pattern in the condensation chamber.

5. A device for recovering condensed water by white smoke elimination of flash steam of a boiler blowdown flash tank according to claim 2, characterized in that, The eye opening (12) is a φ20 round hole.

6. A device for recovering condensed water by white smoke elimination of flash steam of a boiler blowdown flash tank according to claim 1, characterized in that, All the condensate outlet pipes (8) are connected to the main recovery pipe (13) connected to the condensate recovery device, and an electric valve (14) is installed on the main recovery pipe (13).

7. A device for recovering condensed water by white steam elimination of a boiler blowdown flash tank according to claim 6, characterized in that, An ultrasonic level sensor (15) is installed in both the condensing chamber (5) where the flash steam inlet pipe (6) is located and in one of the middle condensing chambers (5). The ultrasonic level sensor (15) is installed at a position no higher than 1 / 2 of the height of the orifice plate (11) located on the lower side.

8. The apparatus for eliminating white spots in flash steam and recovering condensate from boiler blowdown expansion tanks according to claim 1, characterized in that, Cooling air or cooling water is introduced into the cooling pipe (9).

9. A device for recovering condensed water by white smoke elimination of flash steam of a boiler blowdown flash tank according to claim 1, characterized in that, The condenser shell (1), the first partition (2), the second partition (3), the steam baffle plate (4), the flash steam inlet pipe (6), the whitening outlet pipe (7), the cooling pipe (9), and the condensate outlet pipe (8) are all made of corrosion-resistant stainless steel.

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