Condenser structure integrated with steam extractor

Abstract

The invention relates to a condenser structure integrated with a steam air extractor, which is characterized in that a cooling tube bundle is arranged on a tube plate and is divided into a main cooling area I, a main cooling area II and an air extractor cooling area; the steam jet ejector is integrated in a shell of the condenser, an air and dead steam mixture inlet, a working steam inlet and an air outlet are formed in the shell, the air and dead steam mixture inlet corresponds to the first main cooling area, the working steam inlet is connected with a nozzle of the steam jet ejector, and the air outlet is communicated with a cooling area of the steam jet ejector. After the condenser structure integrated with the steam extractor is adopted, vacuum of the condenser can be guaranteed without the help of external suction equipment, when the condenser is used, cooling water is introduced firstly, then working steam is introduced, and the condenser can be started up after the internal vacuum degree of the condenser reaches a target value. Due to the design, the complexity of the system is reduced, a suction pipeline between the condenser and the air extractor and a cooling pipeline of the air extractor are reduced, and the design difficulty of the system is reduced.

Description

Technical Field

[0001] This invention relates to the field of marine condenser equipment technology, specifically to a condenser structure with an integrated steam extractor. Background Technology

[0002] During operation, external air may enter the condenser through flange gaps, shaft seal gaps, or other means. Since the air cannot be condensed and discharged by the cooling water, prolonged operation will cause the vacuum inside the condenser to be lost. Therefore, traditional condensers require the use of steam ejectors, water ejectors, or water ring vacuum pumps to continuously extract air from the condenser chamber and discharge it to the outside to maintain the vacuum inside the condenser.

[0003] The aforementioned external vacuum pumping equipment is typically located outside the condenser and connected to it via system piping. This arrangement not only occupies additional internal space, but also results in the loss of condenser vacuum if a leak occurs in the system piping, thus reducing system reliability. Furthermore, traditional vacuum pumping equipment usually requires corresponding coolers; for example, steam ejectors require coolers to condense the working steam and exhaust steam, while water ejectors require coolers to cool the unsaturated working water. This necessitates additional cooling water inlet and outlet pipes, further increasing system complexity.

[0004] In existing related technologies, such as patent document (CN109708486A), a vacuum system and control method for a steam turbine condenser with a cooling device are disclosed. This system connects an air cooler, a cooling water cooler, and a chilled water cooler sequentially to the outlet of a steam ejector, and uses valve switching to cool non-condensable gases to ensure the operating temperature of the vacuum pump. However, this system still relies on an external vacuum pump and multiple cooling devices, resulting in a large number of devices, complex connecting pipelines, and a large space occupation. Furthermore, the switching control of multiple cooling devices requires precise temperature monitoring and valve regulation, increasing the control difficulty and failure risk of the system, making it unsuitable for marine applications with limited space and high requirements for system simplicity. Patent document (CN203881165U) discloses a condenser with a vacuum enhancement device, which includes a water ejector, a gas-vapor mixture pipeline, a cooler, and a water supply pipeline. The cooler cools the gas-vapor mixture to increase the condenser vacuum. However, this device also places the air extraction components outside the condenser and connects them to the condenser through pipes. This poses a risk of loss of vacuum due to pipe leaks. Furthermore, the installation of water supply pipes and coolers increases the complexity of the system. Under special operating conditions such as ship turbulence, the stability of the pipe connections and the reliability of the equipment are difficult to guarantee. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention proposes a condenser structure with an integrated steam pump, enabling the condenser to maintain a vacuum without relying on external pumping equipment.

[0006] To achieve the above objectives, the technical solution of the present invention is: a condenser structure with an integrated steam ejector, comprising a water chamber, a tube sheet, a shell, a cooling tube bundle, a steam ejector, and a hot well; the cooling tube bundle is installed on the tube sheet and is divided into three areas: a main cooling zone one, a main cooling zone two, and an ejector cooling zone; the steam ejector is integrated inside the shell of the condenser, and the shell is provided with an air and exhaust steam mixture inlet, a working steam inlet, and an air outlet; the air and exhaust steam mixture inlet is provided corresponding to the main cooling zone one, the working steam inlet is connected to the nozzle of the steam ejector, and the air outlet is connected to the cooling zone of the steam ejector.

[0007] Furthermore, the steam ejector includes a precooling zone, an ejector body, and a cooling zone. The ejector body consists of a nozzle and an ejector tube; the nozzle is correspondingly connected to the ejector tube.

[0008] Furthermore, the cooling zone of the ejector is correspondingly provided with the pre-cooling zone of the steam ejector.

[0009] Furthermore, the cooling zone of the steam ejector is provided with a baffle plate, and the baffle plate has openings.

[0010] Furthermore, a drain pipe is connected to the bottom of the cooling zone of the steam jet ejector, and the other end of the drain pipe is connected to the hot well.

[0011] Furthermore, the hot well is located at the bottom of the condenser, and a condensate outlet is provided on the hot well.

[0012] Furthermore, the cooling tube bundles of the main cooling zone one and the main cooling zone two are arranged in an array.

[0013] Furthermore, a baffle is provided between the main cooling zone one and the main cooling zone two. The baffle is used to guide the air and exhaust steam mixture to flow in an orderly manner within the main cooling zone one and the main cooling zone two.

[0014] Furthermore, there are two water chambers, which are installed on both sides of the tube sheet respectively. The water chambers are provided with cooling water inlets and cooling water outlets, which are connected to both ends of the cooling tube bundle to form a cooling water circulation loop.

[0015] Furthermore, the precooling zone of the steam jet ejector is equipped with a return pipe, one end of which is connected to the precooling zone and the other end is connected to the hot well.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention integrates the steam ejector inside the condenser housing, eliminating the need for additional external extraction equipment, significantly reducing the space occupied by the equipment in the ship's cabin, and simplifying the layout of the ship's cabins.

[0018] 2. The connecting pipe between the condenser and the external air extraction equipment in the traditional technology has been eliminated, which fundamentally avoids the problem of condenser vacuum loss caused by pipe leakage. At the same time, it reduces the failure points caused by pipe connection and improves the operational reliability of the entire system.

[0019] 3. There is no need to configure an additional cooler and corresponding cooling water inlet and outlet pipes for the air extraction equipment, which simplifies the system structure, reduces the manufacturing, installation and maintenance costs of the equipment, and also reduces the maintenance workload caused by complex piping.

[0020] 4. The cooling tube bundle is divided into three functional areas. Main cooling zone one and main cooling zone two can efficiently condense the exhaust steam in the air and exhaust steam mixture. The ejector cooling zone can provide cooling for the pre-cooling zone of the steam ejector. In addition, the baffles in the cooling zone extend the gas flow path and further improve the condensation efficiency.

[0021] 5. By using structures such as return flow pipes and drainage pipes, the condensate generated in the pre-cooling zone and cooling zone is guided into the hot well for recycling, which improves the utilization rate of water resources and meets the requirements of energy conservation and environmental protection.

[0022] In summary, by adopting the condenser structure of the integrated steam ejector of this invention, the condenser can maintain a vacuum without the need for external suction equipment. When using the condenser, cooling water is first introduced, followed by working steam. Once the vacuum level inside the condenser reaches the target value, the system can be started. This design reduces system complexity, minimizes the suction pipeline between the condenser and the ejector, and reduces the cooling pipeline of the ejector, thus lowering the design difficulty of the system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the condenser of the integrated steam ejector of the present invention;

[0024] Figure 2 This is a schematic diagram showing the division of the cooling tube bundle area and the steam flow direction of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the steam ejector of the present invention;

[0026] Figure 4 This is a schematic diagram of the steam flow direction inside the steam ejector of the present invention;

[0027] In the diagram: 1-Water chamber; 2-Tube sheet; 3-Shell; 4-Cooling tube bundle; 41-Main cooling zone one; 42-Main cooling zone two; 43-Ejector cooling zone; 5-Steam ejector; 51-Pre-cooling zone; 52-Ejector body; 521-Nozzle; 522-Ejector tube; 53-Cooling zone; 6-Hot well; 7-Baffle plate; 8-Drain pipe; 9-Ejector port; 10-Opening. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 4 As shown in the figure, an embodiment of the present invention provides a condenser structure with an integrated steam ejector. This structure integrates the steam ejector into the interior of the condenser and includes a water chamber 1, a tube sheet 2, a shell 3, a cooling tube bundle 4, a steam ejector 5, and a hot well 6. Two water chambers 1 are provided, respectively installed on both sides of the tube sheet 2. Each water chamber 1 has a cooling water inlet and a cooling water outlet, which are connected to both ends of the cooling tube bundle 4 to form a cooling water circulation loop. The cooling tube bundle 4 is installed on the tube sheet 2 and is divided into three regions: a main cooling zone 41, a main cooling zone 42, and an ejector cooling zone 43. The cooling tube bundles in the main cooling zone 41 and the main cooling zone 42 are arranged in an array. A guide plate is provided between the main cooling zone 41 and the main cooling zone 42 to guide the orderly flow of the air and exhaust steam mixture.

[0030] Cooling water enters the water chamber and then flows through the cooling tube bundle on the tube sheet to another water chamber. The cooling tube bundle is divided into three zones: main cooling zone one, main cooling zone two, and the ejector cooling zone. Figure 2 As shown.

[0031] After the air and exhaust steam mixture enters the condenser, it is condensed in the main cooling zone. The exhaust steam condenses into saturated water, which flows into the hot well and then exits through the condensate outlet. The air enters the ejector cooling zone through the extraction port, that is, it enters the interior of the steam ejector.

[0032] The steam ejector 5 is installed inside the condenser. For example... Figure 2 As shown, the steam ejector 5 includes a precooling zone 51, an ejector body 52, and a cooling zone 53. The ejector body 52 is equipped with an ejector pipe 522, which connects to a nozzle 521. The precooling zone 51 is equipped with a drain pipe 8, one end of which is connected to the precooling zone 51, and the other end is connected to a hot well 6. The baffle plate 7 of the cooling zone 53 has openings 10, and the precooling zone 51 is equipped with an extraction port 9.

[0033] The cooling water cooled in the pre-cooling zone can flow back into the hot well through the exhaust port. The remaining exhaust steam and air, after being cooled in the pre-cooling zone, enter the ejector body and are blown into the cooling zone by the working steam. Only part of the cooling zone is covered by tube bundles. After the exhaust steam, working steam, and air enter the cooling zone, the steam is condensed into water, which enters the rightmost position of the cooling zone through the openings on the baffle plate and finally flows back into the hot well through the drain pipe. The air flows into the atmosphere through the air outlet.

[0034] During manufacturing, the steam ejector is first installed on the condenser shell; then the cooling tube bundle is installed by connecting and expanding the tubes; finally, the water chamber is installed to complete the assembly.

Claims

1. A condenser structure for an integrated steam ejector, characterized in that, It includes a water chamber, tube sheet, shell, cooling tube bundle, steam ejector, and hot well; the cooling tube bundle is installed on the tube sheet and is divided into three areas: main cooling zone one, main cooling zone two, and ejector cooling zone; the steam ejector is integrated inside the shell of the condenser, and the shell is provided with an air and exhaust steam mixture inlet, a working steam inlet, and an air outlet. The air and exhaust steam mixture inlet is set corresponding to main cooling zone one, the working steam inlet is connected to the nozzle of the steam ejector, and the air outlet is connected to the cooling zone of the steam ejector.

2. The condenser structure of the integrated steam ejector according to claim 1, characterized in that, The steam ejector includes a precooling zone, an ejector body, and a cooling zone. The ejector body consists of a nozzle and an ejector tube; the nozzle is connected to the ejector tube.

3. The condenser structure of the integrated steam ejector according to claim 2, characterized in that, The cooling zone of the ejector is correspondingly set up with the pre-cooling zone of the steam ejector.

4. The condenser structure of the integrated steam ejector according to claim 2, characterized in that, The cooling zone of the steam ejector is equipped with a baffle plate, and the baffle plate has openings.

5. The condenser structure of the integrated steam ejector according to claim 2, characterized in that, The bottom of the cooling zone of the steam jet ejector is connected to a drain pipe, and the other end of the drain pipe is connected to a hot well.

6. The condenser structure of the integrated steam ejector according to claim 1, characterized in that, The hot well is located at the bottom of the condenser and has a condensate outlet.

7. The condenser structure of the integrated steam ejector according to claim 1, characterized in that, The cooling tube bundles of the main cooling zone one and the main cooling zone two are arranged in an array.

8. The condenser structure of the integrated steam ejector according to claim 1, characterized in that, A baffle is provided between the main cooling zone one and the main cooling zone two. The baffle is used to guide the air and exhaust steam mixture to flow in an orderly manner within the main cooling zone one and the main cooling zone two.

9. The condenser structure of the integrated steam ejector according to claim 1, characterized in that, The water chamber is provided in two parts, which are installed on both sides of the tube sheet respectively. The water chamber is provided with a cooling water inlet and a cooling water outlet. The cooling water inlet and the cooling water outlet are respectively connected to both ends of the cooling tube bundle to form a cooling water circulation loop.

10. The condenser structure of the integrated steam ejector according to claim 1, characterized in that, The precooling zone of the steam jet ejector is equipped with a return pipe, one end of which is connected to the precooling zone and the other end is connected to the hot well.

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