Boiler denitration ultra-low drain water recovery device

Abstract

The utility model relates to a boiler denitration ultra-low drain water recovery device. A boiler denitration ultra-low drain water recovery pipeline (1), boiler denitration ultra-low drain water to steam balance valves (2) and a steam balance main pipe (3) are sequentially connected; the boiler denitration ultralow drain recovery pipeline (1), the pipeline (4) from the boiler denitration ultralow drain to the reboiling door, the valve (5) from the boiler denitration ultralow drain to the reboiling door and the pipeline (6) from the boiler denitration ultralow drain to the reboiling door are connected in sequence. The utility model has the advantages of low cost, simple process and high reproducibility. According to the utility model, steam and water separately flow into the deaerator and the pipeline, so that vibration caused by mixed flow of steam and water in the original drainage pipeline is avoided, the running safety of equipment is improved, and the stability of running parameters is ensured.

Description

Technical Field

[0001] The utility model relates to a boiler denitration ultra-low hydrophobic recovery device. Background Art

[0002] Boiler flue gas emissions contain NOx. Generally, power plants add catalysts to the flue gas to react with ammonia water sprayed into the flue to reduce the NOx content and meet the target. However, the catalyst added to the flue gas must reach 200°C to have a certain activity. Therefore, the main steam at the boiler outlet is needed to heat the flue gas to increase the activity of the catalyst. The heated steam becomes a steam-water mixture and is recycled into the deaerator water tank, causing overpressure and vibration of the deaerator. Summary of the invention

[0003] The utility model aims to provide a boiler denitration ultra-low hydrophobic recovery device, which can recover steam and water in the steam-hydrophobic mixture to the steam side and water side of the deaerator respectively, avoiding the vibration of the deaerator and preventing the overpressure operation of the deaerator.

[0004] The technical scheme of the utility model is: a boiler denitration ultra-low drain recovery device, comprising a boiler denitration ultra-low drain recovery component and a deaerator steam recovery and heating component; the boiler denitration ultra-low drain recovery component comprises: a boiler denitration ultra-low drain recovery pipeline (1), a boiler denitration ultra-low drain to steam balance valve (2), a steam balance main pipe (3), a boiler denitration ultra-low to reboiling door front pipeline (4), a boiler denitration ultra-low drain to reboiling valve (5), and a boiler denitration ultra-low to reboiling door rear pipeline (6), wherein the boiler denitration ultra-low drain recovery pipeline (1), the boiler denitration ultra-low drain to steam balance valve (2), and the steam balance main pipe (3) are connected in sequence; the boiler denitration ultra-low drain recovery pipeline (1), the boiler denitration ultra-low drain to reboiling door front pipeline (4), the boiler denitration ultra-low drain to reboiling valve (5), and the boiler denitration ultra-low drain to reboiling door rear pipeline (6) ) are connected in sequence; the deaerator steam recovery and heating component comprises: a deaerator (10), a reboiling pipeline (11), a heating steam main pipe (9), a pipeline from heating steam to a reboiling valve (14), a reboiling valve (8), a pipeline from heating steam to a reboiling valve (15), a steam balance main pipe (3), a pipeline from steam balance to a deaerator valve (12), a steam balance valve (7), and a pipeline from steam balance to a deaerator valve (13), wherein the heating steam main pipe (9), the pipeline from heating steam to a reboiling valve (14), the reboiling valve (8), the pipeline from heating steam to a reboiling valve (15), the deaerator (10), and the reboiling pipeline (11) are connected in sequence, and the steam balance main pipe (3), the pipeline from steam balance to a deaerator valve (12), the steam balance valve (7), the pipeline from steam balance to a deaerator valve (13), and the deaerator (10) are connected in sequence.

[0005] The boiler denitration ultra-low drain recovery pipeline (1) is connected to the reboiling pipeline (11), and the boiler denitration ultra-low drain recovery pipeline (1) is connected to the steam balance main pipe (3). The drain is a steam-water mixture and can be recovered to the water side and steam side of the deaerator respectively.

[0006] Working principle of this utility model:

[0007] During operation, the utility model opens the boiler denitration ultra-low drain to steam balance valve (2) and the boiler denitration ultra-low drain to reboiling valve (5) at the same time, and the boiler denitration ultra-low drain enters the deaerator reboiling pipe through the boiler denitration ultra-low drain to reboiling valve (5). Since the reboiling pipe is inside the water tank, no vibration is generated; the steam in the boiler denitration ultra-low drain enters the steam balance main pipe (3) through the boiler denitration ultra-low drain to steam balance valve (2), balancing the main pipe pressure, achieving the effect of reducing the pressure, so that the deaerator will not be over-pressurized.

[0008] Technical effects of this utility model:

[0009] The utility model has low cost, simple process and high replicability. It only changes the original pipeline interface and adds a steam balance pipeline on the basis of the original boiler denitrification ultra-low pipeline. It has low construction difficulty and small construction amount, but has great adjustment flexibility in production operation. The mixed flow of steam and water in the original denitrification ultra-low drain pipeline will produce water hammer, causing the pipeline to vibrate, and even cause the pipeline to rupture in severe cases. After the utility model is applied, the steam and water flow separately into the deaerator and the pipeline, avoiding the vibration caused by the mixed flow of steam and water in the original drain pipeline, improving the safety of equipment operation, and ensuring the stability of operating parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0011] like Figure 1As shown, a boiler denitration ultra-low drain recovery device comprises a boiler denitration ultra-low drain recovery component and a deaerator steam recovery and heating component; the boiler denitration ultra-low drain recovery component comprises: a boiler denitration ultra-low drain recovery pipeline 1, a boiler denitration ultra-low drain to steam balance valve 2, a steam balance mother pipe 3, a boiler denitration ultra-low to reboiling gate front pipeline 4, a boiler denitration ultra-low drain to reboiling valve 5, and a boiler denitration ultra-low to reboiling gate rear pipeline 6, wherein the boiler denitration ultra-low drain recovery pipeline 1, the boiler denitration ultra-low drain to steam balance valve 2, and the steam balance mother pipe 3 are connected in sequence; the boiler denitration ultra-low drain recovery pipeline 1, the boiler denitration ultra-low drain to reboiling gate front pipeline 4, the boiler denitration ultra-low drain to reboiling valve 5, the boiler denitration ultra-low drain to reboiling gate rear pipeline 6 The rear pipeline 6 is connected in sequence; the deaerator steam recovery and heating components include: a deaerator 10, a reboiling pipeline 11, a heating steam main pipe 9, a pipeline 14 before the heating steam to the reboiling valve, a reboiling valve 8, a heating steam to a pipeline 15 after the reboiling valve, a steam balance main pipe 3, a steam balance to a pipeline 12 before the deaerator valve, a steam balance valve 7, and a steam balance to a pipeline 13 after the deaerator valve, wherein the heating steam main pipe 9, the heating steam to the pipeline 14 before the reboiling valve, the reboiling valve 8, the heating steam to the pipeline 15 after the reboiling valve, the deaerator 10, and the reboiling pipeline 11 are connected in sequence, and the steam balance main pipe 3, the steam balance to the pipeline 12 before the deaerator valve, the steam balance valve 7, the steam balance to the pipeline 13 after the deaerator valve, and the deaerator 10 are connected in sequence.

Claims

1. A boiler denitration ultra-low hydrophobic recovery device, characterized by: Including boiler Denitration ultra-low drain recovery component and deaerator steam recovery and heating component; the boiler denitration ultra-low drain recovery component comprises: a boiler denitration ultra-low drain recovery pipeline (1), a boiler denitration ultra-low drain to steam balance valve (2), a steam balance main pipe (3), a boiler denitration ultra-low to reboiling door front pipeline (4), a boiler denitration ultra-low drain to reboiling valve (5), and a boiler denitration ultra-low to reboiling door rear pipeline (6), wherein the boiler denitration ultra-low drain recovery pipeline (1), the boiler denitration ultra-low drain to steam balance valve (2), and the steam balance main pipe (3) are connected in sequence; the boiler denitration ultra-low drain recovery pipeline (1), the boiler denitration ultra-low drain to reboiling door front pipeline (4), the boiler denitration ultra-low drain to reboiling valve (5), and the boiler denitration ultra-low drain to reboiling door rear pipeline (6) are connected in sequence; deaerator steam recovery and heating The component comprises: a deaerator (10), a reboiling pipeline (11), a heating steam main pipe (9), a pipeline from heating steam to a reboiling valve (14), a reboiling valve (8), a pipeline from heating steam to a reboiling valve (15), a steam balance main pipe (3), a pipeline from steam balance to a deaerator valve (12), a steam balance valve (7), and a pipeline from steam balance to a deaerator valve (13), wherein the heating steam main pipe (9), the pipeline from heating steam to a reboiling valve (14), the reboiling valve (8), the pipeline from heating steam to a reboiling valve (15), the deaerator (10), and the reboiling pipeline (11) are connected in sequence, and the steam balance main pipe (3), the pipeline from steam balance to a deaerator valve (12), the steam balance valve (7), the pipeline from steam balance to a deaerator valve (13), and the deaerator (10) are connected in sequence.

2. The boiler denitration ultra-low hydrophobic recovery device according to claim 1 is characterized in that: Boiler Denitrification The ultra-low drain recovery pipeline (1) is connected to the reboiling pipeline (11), and the boiler denitration ultra-low drain recovery pipeline (1) is connected to the steam balance main pipe (3).

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