A single-layer tray-type horizontal flow-through bubbling deoxygenation device

Abstract

The present invention relates to a single-layer tray-type horizontal flow-around bubbling deaerator, which belongs to the technical field of power generation equipment. It is arranged between the condenser cooling tube bundle and the hot well condensate operating water level, and includes a condensate collecting tray, the condensate collecting tray is provided with a horizontal tray surface, and a plurality of bubbling plates for passing steam are provided on the tray surface; a plurality of partitions are provided on the tray surface perpendicular to the horizontal tray surface; baffles of different heights perpendicular to the horizontal tray surface are provided on the corresponding two sides of the condensate collecting tray, and an intermediate baffle is also provided on the tray surface for guiding the condensate to flow to the bubbling plates. The present invention simplifies and merges the heating steam zone, bubbling deaerator zone and heat recovery zone of the condenser bubbling deaerator; reduces the equipment height requirement of the bubbling deaerator, so that it is suitable for modified units whose external dimensions cannot be changed, while not affecting the heat recovery space and the hot well water storage space.

Description

Technical Field

[0001] The invention relates to a single-layer tray-type horizontal flow-around bubbling deoxygenation device, belonging to the technical field of power generation equipment. Background Art

[0002] The thermal cycle in steam turbine generators in thermal or nuclear power plants uses extremely clean water as the medium. The condenser in a steam turbine generator condenses the steam discharged from the turbine's low-pressure cylinder into water for recycling. During startup and operation, some of the medium is lost or extracted according to operational needs. This requires replenishing the unit's medium water supply. This replenishment water is desalinated water at room temperature. The condenser with the closest temperature parameters within the unit is selected as the replenishment water receiver. This replenished desalinated water has a high oxygen content, so deoxygenation is necessary to reduce corrosion during operation. Most surface condensers used in steam turbines primarily utilize vacuum deaeration. However, for extraction units with large water replenishment volumes, a bubbling deaerator is required in the condenser hot well to ensure the oxygen content of the condensate. In existing technology, steam is introduced into the condenser's hot well to heat the condensate. Small holes are then placed in the bubbling plate to increase contact between the condensate and the steam, further deoxygenating the condensate. The deoxygenated condensate flows to the hot well condensate outlet, while the non-condensable gases released from the condensate enter the shell through an exhaust pipe and are extracted from the condenser's air-cooling zone, thus ensuring the condensate's oxygen content. The bubbling device is installed between the condenser's cooling tube bundle and the high liquid level of the hot well condensate. Existing bubbling deoxygenation devices are often installed when the condenser is newly built. Their disadvantages include high equipment height requirements and the inability to increase the overall dimensions of the equipment in retrofitted units. Retrofitting the unit and adding a bubbling deoxygenation device would affect the existing heat recovery space in the tube bundle and the hot well water storage space. (The heat recovery space refers to the minimum distance from the cooling pipes of the condenser heat exchange to the condensate level surface or the baffle surface. The surface condenser condenses the low-pressure cylinder exhaust steam through its cooling pipes. In order to ensure that the condensate is undercooled, the low-pressure cylinder exhaust steam will flow from the gap between the cooling pipe bundles to the bottom space of the tube bundle to recover the condensate. The heat recovery space must be guaranteed.) Therefore, this technical field urgently needs to solve the technical problem of how to simplify and merge the heating steam zone, bubbling deaeration zone and heat recovery zone of the condenser bubbling deaeration device; to reduce the equipment height requirements of the bubbling deaeration device, so as to be suitable for the modified units whose external dimensions cannot be changed, and at the same time not affect the heat recovery space and the hot well water storage space. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problem of how to simplify and merge the heating steam zone, bubbling deaeration zone and heat recovery zone of the condenser bubbling deaeration device; to reduce the equipment height requirement of the bubbling deaeration device, to be suitable for the modified units whose external dimensions cannot be changed, and at the same time not affecting the heat recovery space and hot well water storage space.

[0004] In order to achieve the purpose of solving the above-mentioned problems, the technical solution adopted by the present invention is to provide a single-layer tray-type horizontal flow-through bubbling deoxygenation device, which is arranged between the condenser cooling tube bundle and the hot well condensate operating water level, including a condensate collecting tray, the condensate collecting tray is provided with a horizontal tray surface, and a plurality of bubbling plates for passing steam are provided on the tray surface; a plurality of partitions are provided on the tray surface perpendicular to the horizontal tray surface; baffles of different heights perpendicular to the horizontal tray surface are provided on the corresponding two sides of the condensate collecting tray, and an intermediate baffle is also provided on the tray surface for guiding the condensate to flow to the bubbling plate.

[0005] Preferably, a steam discharge box is provided below the condensate collecting tray and corresponding to the bubbling plate.

[0006] Preferably, a low baffle for allowing condensate to flow out of the collection tray and a high baffle for preventing condensate from flowing out of the collection tray are respectively provided on corresponding sides of the condensate collection tray; and a bubbling plate is provided between the low baffle and the high baffle.

[0007] Preferably, the plurality of partitions are parallel to each other and connected to the disk surface of the condensate collecting tray, dividing the disk surface of the condensate collecting tray into a plurality of compartments; and condensate communication ports are provided on the partitions between adjacent compartments.

[0008] Preferably, the low baffle and the high baffle are parallel.

[0009] Preferably, the partition is vertically arranged between the low baffle and the high baffle.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. The present invention does not affect the original hot well liquid level;

[0012] 2. The present invention ensures heat recovery space in the upper tube bundle;

[0013] 3. The present invention allows condensed water to flow horizontally on the tray where the bubbling plate and the water collecting tray are combined, with a slow flow rate, thereby increasing the bubbling deoxygenation time and improving the deoxygenation efficiency.

[0014] 4. Compared with the original bubbling deaerator, the present invention uses less material and is easier to install; it can meet the requirement of adding a bubbling deaerator to the surface condenser without changing the external dimensions and tube bundle heat recovery space.

[0015] 5. The present invention is suitable for renovating units or building new units with smaller external dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure numerals: 1. Condensate collecting tray; 2. Partition; 3. Bubble plate; 4. Steam discharge box; 5. Bubble steam inlet; 6. Condensate communication port; 7. Low baffle; 8. High baffle; 9. Middle baffle. DETAILED DESCRIPTION

[0018] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings:

[0019] like Figure 1 As shown, the technical solution adopted by the present invention is to provide a single-layer tray-type horizontal flow-around bubbling deaerator, which is installed between the condenser cooling tube bundle and the hot well condensate operating water level. The device includes a condensate collection tray 1 with a horizontal tray surface, on which are disposed a plurality of bubbling plates 3 for passing steam; a plurality of partitions 2 are disposed perpendicular to the horizontal tray surface; baffles of different heights are disposed perpendicular to the horizontal tray surface on corresponding sides of the condensate collection tray 1; and an intermediate baffle 9 is also disposed on the tray surface to guide the condensate toward the bubbling plates 3. A steam discharge box 4 is disposed below the condensate collection tray 1, corresponding to the bubbling plates 3. The steam discharge box 4 is connected to the bubbling steam inlet 5; a low baffle 7 for allowing condensate to flow out of the collection tray and a high baffle 8 for preventing condensate from flowing out of the collection tray are disposed on corresponding sides of the condensate collection tray 1, respectively. The bubbling plates 3 are disposed between the low baffle 7 and the high baffle 8. Multiple partitions 2 are parallel to each other and connected to the condensate collection tray, dividing the tray into multiple compartments. Condensate is evenly distributed between the partitions. Condensate communication ports 6 are provided on the partitions between adjacent compartments. A lower baffle 7 and a higher baffle 8 are parallel. The partitions 2 are perpendicularly positioned between the lower and higher baffles 7 and 8, with their surfaces perpendicular to those of the lower and higher baffles 7 and 8.

[0020] The present invention simplifies and merges the heating steam zone, bubbling deaeration zone and heat recovery zone of the condenser bubbling deaeration device, reduces the equipment height requirement of the bubbling deaeration device, and is applicable to modified units whose external dimensions cannot be changed, while not affecting the heat recovery space and hot well water storage space.

[0021] The bubbling deoxygenation device provided by the present invention is installed between the tube bundle and the operating water level of the hot well. It adopts a single-layer method of combining a bubbling plate and a water collecting tray to receive condensate from the tube bundle and make the condensate flow horizontally around the bubbling plate, forcing the condensate to pass through the bubbling plate area for heating and deoxygenation, and finally flow into the hot well. The flow process of condensate flow is as follows Figure 1 Indicated by the arrow.

[0022] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the scope of protection of the present invention. Any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the spirit and scope of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A single-layer tray-type horizontal flow-through bubbling deaerator, installed between the condenser cooling tube bundle and the hot well condensate operating water level, characterized in that: The condensate collecting tray comprises a horizontal tray with a plurality of bubbling plates for passing steam; a plurality of partitions are provided on the tray perpendicular to the horizontal tray; baffles of different heights perpendicular to the horizontal tray are provided on the two corresponding sides of the condensate collecting tray; and an intermediate baffle is provided on the tray for guiding the condensate to flow toward the bubbling plates; The two corresponding sides of the condensate collection tray are respectively provided with a low baffle for condensate to flow out of the collection tray and a high baffle to prevent condensate from flowing out of the collection tray; the bubbling plate is arranged between the low baffle and the high baffle; The plurality of partitions are parallel to each other and connected to the disk surface of the condensate collecting tray, dividing the disk surface of the condensate collecting tray into a plurality of compartments; condensate communication ports are provided on the partitions between adjacent compartments.

2. A single-layer tray-type horizontal flow-around bubbling deoxygenation device according to claim 1, characterized in that: A steam discharge box is provided below the condensate collecting tray and corresponding to the bubbling plate.

3. A single-layer tray-type horizontal flow-around bubbling deoxygenation device according to claim 1, characterized in that: The low baffle and the high baffle are parallel.

4. A single-layer tray-type horizontal flow-around bubbling deoxygenation device according to claim 3, characterized in that: The partition is vertically arranged between the low baffle and the high baffle.

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