A waste heat boiler blowdown expansion tank mist elimination device

Abstract

This utility model discloses a defogging device for a waste heat boiler blowdown expansion container, including a blowdown expansion container for receiving wastewater. A steam inlet pipe is connected to the left side of the blowdown expansion container, and a first pipe for conveying wastewater is connected to the steam inlet pipe. The end of the first pipe is connected to a steam drum for fixed and continuous discharge. A second pipe for conveying wastewater is connected to the steam inlet pipe, and a boiler header is connected to the end of the second pipe. A condensate pipe is connected to the bottom of the blowdown expansion container, and a regulating valve for controlling the liquid level in the blowdown expansion container is installed on the condensate pipe. A level gauge for monitoring the liquid level in the blowdown expansion container is connected to the right side of the blowdown expansion container. A steam exhaust pipe is connected to the top of the blowdown expansion container, and the end of the steam exhaust pipe is connected to the defogging device body.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical equipment technology, specifically relating to a defogging device for a waste heat boiler blowdown expansion tank. Background Technology

[0002] The structural diagram of the waste heat boiler blowdown expansion tank mist elimination device is as follows: Figure 1 As shown, the wastewater from the waste heat boiler enters the blowdown expansion tank, which is connected to the demisting device via a pipeline. The blowdown expansion tank is located at the 0.00 level of the waste heat boiler, and the steam separated from the blowdown expansion tank is directly discharged into the atmosphere.

[0003] When winter arrives or the sewage discharge volume is large, a large amount of steam is discharged from the sewage expansion container, causing corrosion of the steel structure of the plant and condensate to fall to the ground and freeze, creating safety hazards. Utility Model Content

[0004] This utility model provides a defogging device for the waste heat boiler blowdown expansion container, which aims to eliminate steam at the outlet of the blowdown expansion container when winter arrives or the blowdown volume is large, thereby avoiding safety hazards caused by steam corrosion of the steel structure of the plant and ground icing.

[0005] Therefore, the present invention adopts the following technical solution:

[0006] A defogging device for a waste heat boiler blowdown expansion container includes a blowdown expansion container for receiving wastewater. A steam inlet pipe is connected to the left side of the blowdown expansion container, and a first pipe for conveying wastewater is connected to the steam inlet pipe. The end of the first pipe is connected to a steam drum for fixed and continuous blowdown. A second pipe for conveying wastewater is connected to the steam inlet pipe, and a boiler header is connected to the end of the second pipe. A condensate pipe is connected to the bottom of the blowdown expansion container, and a regulating valve for controlling the liquid level in the blowdown expansion container is installed on the condensate pipe. A level gauge for monitoring the liquid level in the blowdown expansion container is connected to the right side of the blowdown expansion container. A steam exhaust pipe is connected to the top of the blowdown expansion container, and the end of the steam exhaust pipe is connected to the defogging device body.

[0007] It also includes a multi-hole plate steam-water separator and a cooling water pipe. The end of the multi-hole plate steam-water separator is connected to a reducing pipe, and the end of the reducing pipe is connected to a louvered steam-water separator. The end of the louvered steam-water separator is connected to the body of the defogging device, and the end of the body of the defogging device is connected to a water collection device. Above the water collection device is a water curtain device, which is fixed to the end of the cooling water pipe. The cooling water pipe is equipped with a regulating valve to control the flow rate of the cooling water.

[0008] Further regulating valves control the liquid level in the sewage expansion container, ensuring that the liquid level in the sewage expansion container is always higher than the position of the steam inlet pipe. After the sewage enters the sewage expansion container, it undergoes the first demisting and pressure reduction in the water. The steam separated from the sewage expansion container enters the demisting device, and after passing through a two-stage steam-water separator, the steam water content and pressure are even lower. After passing through the water curtain device, the steam is completely eliminated. The regulating valve on the cooling water pipeline controls the cooling water flow rate to avoid water waste.

[0009] The beneficial effects of this utility model are as follows: This utility model is mainly applied to the waste heat boiler blowdown expansion tank. By adding a defogging device, not only is the steam at the outlet of the blowdown expansion tank eliminated, but the safety hazards caused by steam corrosion of the steel structure of the plant and ground icing are also solved when winter comes or the blowdown volume is large. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the equipment structure of the waste heat boiler blowdown expansion tank mist elimination system;

[0011] Figure 2 This is a schematic diagram of the defogging device for the waste heat boiler blowdown expansion tank;

[0012] In the diagram: 1-Sewage discharge expansion container, 2-Steam discharge pipe, 3-Anti-fog device body, 4-Steam inlet pipe, 5-Steam drum fixed discharge and continuous discharge, 6-Boiler header, 7-First pipe, 8-Second pipe, 9-Condensate pipe, 10-Regulating valve, 11-Level gauge, 12-Reducing pipe, 13-Water collection device, 14-Regulating valve, 15-Cooling water pipe, 16-Water curtain device, 17-Louvre type steam-water separator, 18-Perforated plate type steam-water separator. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0014] like Figure 1 and 2 As shown, a demisting device for a waste heat boiler blowdown expansion container includes a blowdown expansion container 1 for receiving wastewater. A steam inlet pipe 4 is connected to the left side of the blowdown expansion container 1. The steam inlet pipe 4 is connected to a first pipe 7 for conveying wastewater. The tail end of the first pipe 7 is connected to a steam drum fixed discharge and continuous discharge pipe 5. A second pipe 8 for conveying wastewater is also connected to the steam inlet pipe 4. The tail end of the second pipe 8 is connected to a boiler header 6. A condensate pipe 9 is connected to the bottom of the blowdown expansion container 1. A regulating valve 10 for controlling the liquid level in the blowdown expansion container is installed on the condensate pipe 9. A level gauge 11 for monitoring the liquid level in the blowdown expansion container is connected to the right side of the blowdown expansion container 1. A steam exhaust pipe 2 is connected to the top of the blowdown expansion container 1. The tail end of the steam exhaust pipe 2 is connected to the demisting device body 3.

[0015] It also includes a primary perforated plate steam-water separator 18 and a cooling water pipe 15. The end of the perforated plate steam-water separator 18 is connected to a reducing pipe 12, and the end of the reducing pipe 12 is connected to a louvered steam-water separator 17. The end of the louvered steam-water separator 17 is connected to the body 3 of the defogging device, and the end of the body 3 of the defogging device is connected to the water collection device 13. Above the water collection device 13 is a water curtain device 16, which is fixed to the end of the cooling water pipe 15. A regulating valve 14 for controlling the flow rate of cooling water is installed on the cooling water pipe.

[0016] It also includes regulating valve 10 to control the liquid level of the sewage expansion container, so that the liquid level of the sewage expansion container is always higher than the position of the steam inlet pipe 4. After the sewage enters the sewage expansion container 1, it undergoes the first defogging and pressure reduction in the water. The steam separated from the sewage expansion container enters the defogging device 3. After passing through the two-stage steam-water separators 18 and 17, the steam has a lower water content and pressure. After passing through the water curtain device 16, the steam is completely eliminated. The regulating valve 14 on the cooling water pipeline controls the cooling water flow rate to avoid water waste.

Claims

1. A demisting device for a waste heat boiler blowdown expansion tank, characterized in that, The system includes a wastewater discharge expansion container (1) for receiving wastewater, a steam inlet pipe (4) connected to the left side of the wastewater discharge expansion container (1), a first pipe (7) for conveying wastewater connected to the steam inlet pipe (4), a steam drum fixed discharge and continuous discharge (5) connected to the end of the first pipe (7); a second pipe (8) for conveying wastewater connected to the steam inlet pipe (4), a boiler header (6) connected to the end of the second pipe (8); a condensate pipe (9) connected to the bottom of the wastewater discharge expansion container (1), a regulating valve (10) for controlling the liquid level of the wastewater discharge expansion container installed on the condensate pipe (9); a level gauge (11) for monitoring the liquid level of the wastewater discharge expansion container connected to the right side of the wastewater discharge expansion container (1); a steam pipe (2) connected to the top of the wastewater discharge expansion container (1); and a demisting device body (3) connected to the end of the steam pipe (2). It also includes a primary perforated plate steam-water separator (18) and a cooling water pipe (15). The end of the perforated plate steam-water separator (18) is connected to a reducing pipe (12), and the end of the reducing pipe (12) is connected to a louvered steam-water separator (17). The end of the louvered steam-water separator (17) is connected to the body of the defogging device (3), and the end of the body of the defogging device (3) is connected to a water collection device (13). Above the water collection device (13) is a water curtain device (16), which is fixed at the end of the cooling water pipe (15). A regulating valve (14) for controlling the flow rate of cooling water is installed on the cooling water pipe.

2. The demisting device for the waste heat boiler blowdown expansion tank according to claim 1, characterized in that, The regulating valve (10) is used to control the liquid level of the sewage expansion container (1) so that the liquid level of the sewage expansion container (1) is always higher than the position of the steam inlet pipe (4).

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