A heat-supplying and pure-condensing dual-mode condenser and a method for controlling operation thereof
By setting up condensation and cooling sections inside the condenser and using regulating valves to control the flow of circulating water and heating network water, the problem of excessively high condensate temperature during condenser heating system retrofitting was solved, achieving stable operation and safe switching under different operating conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGFANG TURBINE CO LTD
- Filing Date
- 2026-01-27
- Publication Date
- 2026-05-29
AI Technical Summary
During the heating system renovation of the steam turbine condenser, the condensate temperature was too high, exceeding the temperature limit of the condensate polishing system, which increased the technical difficulty.
Design a dual-mode condenser for heating and pure condensation, with an internal condensation section and a cooling section. The flow of circulating water and heating network water is controlled by regulating valves to achieve heat exchange and condensation under different operating conditions, ensuring that the condensate temperature is within a reasonable range.
It meets technical requirements under both heating and pure condensing conditions, ensuring normal operation of the condenser, simplifying the structure and improving operational safety and flexibility.
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Figure CN122107804A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steam turbine technology, specifically to a dual-mode condenser for heating and pure condensing and its operation control method. Background Technology
[0002] When retrofitting the condenser of a steam turbine unit for heating, since both pure condensation and heating need to be completed within a single condenser shell, the design of such a condenser needs to consider both the exhaust steam heating condition and the pure condensation condition.
[0003] However, in pure condensing operation, condensation is achieved by using circulating water to condense the exhaust steam. In heating operation, condensation is achieved by using heating network water to condense the exhaust steam. This results in a higher condensate temperature during heating operation. Because the condensate polishing system is limited by the operating temperature of the ion exchange resin and cannot accept high-temperature condensate, this increases the technical difficulty of condenser modification for heating operation and requires technical breakthroughs. Summary of the Invention
[0004] The technical objective of this invention is to provide a dual-mode condenser for heating and pure condensation, which can meet the technical requirements of different operating conditions such as heating and pure condensation, and ensure that the condensate temperature meets the technical requirements during heating operation, in view of the special characteristics of the above-mentioned steam turbine condenser heating retrofit and condensate polishing system, as well as the operation control method of the condenser.
[0005] The technical objective of this invention is achieved through the following technical solution: a dual-mode condenser for heating and pure condensation, comprising a condenser body; The condenser body has a condensation section above the operating liquid level and a cooling section below the operating liquid level. At least one set of condensation section water chambers is provided at the condensation section. Each set of condensation section water chambers has a condensation section inlet water chamber and a condensation section outlet water chamber that constitute the inlet and outlet flow. The condensation section inlet water chamber is provided with two interfaces for circulating water to enter and heating network water to enter. The condensation section outlet water chamber is provided with two interfaces for circulating water to flow out and heating network water to flow out. The cooling section is provided with at least one set of cooling section water chambers. Each set of cooling section water chambers has a hot water inlet interface and a hot water outlet interface that constitute the inlet and outlet flow, and each set of cooling section water chambers has a condensate outlet interface.
[0006] Furthermore, the condenser body is connected to the circulating water inlet pipe, the circulating water outlet pipe, the heating network water inlet main pipe, and the heating network water outlet main pipe; The circulating water inlet pipe is sealed to the circulating water inlet interface of the condensation section inlet chamber; The circulating water outlet pipe is sealed to the circulating water outlet interface of the condensate section outlet chamber; The main inlet pipe of the heating network water has branch pipes for the condensate section and cooling section. The branch pipes for the condensate section are sealed to the inlet interface of the condensate section water chamber, and the branch pipes for the cooling section are sealed to the inlet interface of the cooling section water chamber. The main outlet pipe of the heating network water has branch pipes for outlet water through the condensation section and branch pipes for outlet water through the cooling section. The branch pipes for outlet water through the condensation section are sealed to the outlet port of the condensation section water chamber, and the branch pipes for outlet water through the cooling section are sealed to the outlet port of the cooling section water chamber.
[0007] Furthermore, the condenser body is connected to the condensate outlet main pipe; The main condensate outlet pipe has two branch pipes: one for pure condensation operation and one for heating operation. The pure condensation operation condensate outlet branch pipe is sealed to the condensate chamber of the condenser body, and the heating operation condensate outlet branch pipe is sealed to the condensate outlet interface of the cooling section water chamber.
[0008] Furthermore, a second regulating valve is installed on the condensate outlet branch pipe of the pure condensate operation.
[0009] Furthermore, a first regulating valve is installed on the branch pipe of the heating network water inlet cooling section.
[0010] Furthermore, the condenser body has a dual-inlet and dual-outlet structure, with two relatively independent sets of condensation section water chambers in the condensation section and two relatively independent sets of cooling section water chambers in the cooling section.
[0011] Furthermore, the main body of the condenser is a wet-cooled unit condenser; Alternatively, the condenser may be a condenser cooled by circulating water in an indirect air-cooled unit.
[0012] A method for operating and controlling the above-mentioned dual-mode condenser (heating and pure condensing) includes: When operating under pure condensation conditions, open the second regulating valve to activate the circulating water process. The circulating water will achieve heat exchange and condensation through the corresponding condensation section water chamber at the condensation section. When the heating is in operation, the second regulating valve is closed and the heating network water flow is activated. The heating network water undergoes heat exchange and condensation through the corresponding condensate water chamber at the condensate section and the corresponding cooling water chamber at the cooling section. The upper condensate water chamber first exchanges heat and condenses with the heating network water, and then the lower cooling water chamber exchanges heat and condenses with the heating network water. During the process, the condensate water temperature of the cooling water chamber is controlled by the first regulating valve.
[0013] Furthermore, during heating operation, when the operating liquid level in the condenser body is lower than the inlet water level at the cooling section, the second regulating valve is opened to prevent the condensate pump from sucking in air.
[0014] The beneficial technical effects of this invention are as follows: The above-mentioned technical measures are designed to address the specific characteristics of the steam turbine condenser heating retrofit and condensate polishing system. By setting up condensation and cooling sections inside the condenser body, and connecting the condensation and cooling sections to the heat network structure and the condensation section to the circulating water structure, the technical requirements of both heating and pure condensation operating modes can be met. Furthermore, the exhaust steam during heating operation is sequentially cooled by the condensation and cooling sections, thereby ensuring that the condensate temperature during heating operation meets the technical requirements. This invention features high integration and a simple configuration structure, ensuring normal switching and safe operation of the condenser in pure condensation and heating operating environments. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of one structure of the condenser of the present invention.
[0016] The symbols in the diagram have the following meanings: 1—exhaust steam inlet; 2—condensate section water inlet chamber; 3—cooling section water chamber; 4—circulating water inlet pipe; 5—heating network water inlet main pipe; 6—heating network water inlet condensate section branch pipe; 7—heating network water inlet cooling section branch pipe; 8—circulating water outlet pipe; 9—heating network water outlet main pipe; 10—heating network water outlet branch pipe via condensate section; 11—heating network water outlet branch pipe via cooling section; 12—first regulating valve; 13—second regulating valve; 14—condensate water outlet main pipe; 15—condensate section; 16—cooling section; 17—operating liquid level; 18—cooling section inlet water level; 19—condensate section outlet chamber; 20—condensate water outlet branch pipe for pure condensation operation; 21—condensate water outlet branch pipe for heating operation. Detailed Implementation
[0017] This invention relates to the field of steam turbine technology, specifically to a dual-mode condenser for heating and pure condensation, and a method for controlling the operation of the dual-mode condenser. The technical solution of this invention will be clearly and thoroughly explained below with reference to the accompanying drawings.
[0018] Example 1 See Figure 1 As shown, the present invention is a condenser for a dual-inlet, dual-outlet wet-cooled unit, which includes a condenser body, a circulating water inlet pipe 4, a circulating water outlet pipe 8, a heating network water inlet main pipe 5, a heating network water outlet main pipe 9, and a condensate outlet main pipe 14.
[0019] Specifically, inside the condenser body, there is a condensation section 15 above the operating liquid level 17 and a cooling section 16 below the operating liquid level 17. The condensation section 15 has two sets of relatively independently operating condensation section water chambers, and the cooling section 16 has two sets of relatively independently operating cooling section water chambers 3.
[0020] Each set of condensate section water chambers has a condensate section inlet chamber 2 and a condensate section outlet chamber 19 that constitute the inlet and outlet flow path. That is, the condensate section inlet chamber 2 and the condensate section outlet chamber 19 of the same set are connected by several cooling tube bundles arranged in the middle. The condensate section inlet chamber 2 is provided with two interfaces for circulating water to enter and heating network water to enter. The condensate section outlet chamber 19 is provided with two interfaces for circulating water to exit and heating network water to exit. In other words, each set of condensate section water chambers has two sets of interfaces corresponding to different operating conditions and environmental requirements.
[0021] Each cooling section water chamber 3 has a hot water inlet and a hot water outlet that constitute the flow path. That is, the hot water inlet and hot water outlet of the same group are connected by several cooling tube bundles arranged in the middle. In addition, since condensate will be generated in the cooling section water chamber 3, a condensate outlet (which can be defined as the condensate outlet under heating conditions) is provided at the bottom of the cooling section water chamber 3.
[0022] In the above structure, the operation of the lower cooling section water chamber 3 is independent of the upper condensate section water chamber. As the upper condensate section water chamber, the condensate it produces can either enter the cooling section water chamber 3 or be directly discharged according to the operating conditions. Therefore, a condensate outlet port (which can be defined as the pure condensate condition condensate outlet port) is provided at the bottom of the condenser body, independent of the cooling section water chamber 3.
[0023] Corresponding to the two sets of condensate section water chambers mentioned above, there are two sets of circulating water inlet pipes 4. Each set of circulating water inlet pipes 4 is sealed to the circulating water inlet interface of the corresponding condensate section water inlet chamber 2.
[0024] Corresponding to the two sets of condensate section water chambers mentioned above, there are two sets of circulating water outlet pipes 8. Each set of circulating water outlet pipes 8 is sealed and connected to the circulating water outlet interface of the corresponding condensate section water chamber 19.
[0025] Corresponding to the two sets of condensate section water chambers and the two sets of cooling section water chambers 3, there are two sets of main inlet pipes 5 for the heating network water. Each set of main inlet pipes 5 has a branch pipe 6 for heating network water entering the condensate section and a branch pipe 7 for heating network water entering the cooling section. The branch pipe 6 is sealed to the heating network water inlet interface of the condensate section water chamber 2, and the branch pipe 7 is sealed to the heating network water inlet interface of the cooling section water chamber 3. In order to controllably adjust the temperature of the condensate water generated in the cooling section water chamber 3, a first regulating valve 12 is installed on the branch pipe 7 for heating network water entering the cooling section.
[0026] Corresponding to the two sets of condensate section water chambers and the two sets of cooling section water chambers 3 mentioned above, there are two sets of main outlet pipes 9 for the heating network water. Each set of main outlet pipes 9 for the heating network water has a branch pipe 10 for the condensate section and a branch pipe 11 for the cooling section. The branch pipe 10 is sealed to the outlet port of the condensate section water chamber 19, and the branch pipe 11 is sealed to the outlet port of the cooling section water chamber 3.
[0027] The condensate outlet main pipe 14 discharges the condensate generated by the entire condenser body; therefore, the condensate outlet main pipe 14 is a set. However, corresponding to the aforementioned condensate generation path—the upper condensate section water chamber and the two sets of lower cooling section water chambers 3—condensate is generated separately. The condensate outlet main pipe 14 has two branch pipes 20 for pure condensation operation and two branch pipes 21 for heating operation. The pure condensation operation branch pipe 20 is sealed to the condensate chamber of the condenser body (i.e., the pure condensation operation condensate outlet interface), and the two branch pipes 21 for heating operation are sealed to the condensate outlet interfaces of the corresponding cooling section water chambers 3. To achieve switching and control of different operating modes, a second regulating valve 13 is installed on the pure condensation operation branch pipe 20.
[0028] The operation control of the above-mentioned dual-mode condenser (heating and pure condensing) includes the following two operating conditions: When operating under pure condensing conditions, the second regulating valve 13 is opened to activate the circulating water process. Exhaust steam enters from the exhaust steam inlet 1 of the condenser body. The circulating water undergoes heat exchange and condensation through the corresponding condensing section water chamber at the condensing section 15 to produce saturated condensate. This saturated condensate does not need to be cooled again through the cooling section water chamber 3 of the cooling section 16, but is directly discharged through the pure condensing condition condensate outlet branch pipe 20. During heating operation, the second regulating valve 13 is closed, and the heating network water flow is activated. Exhaust steam enters from the exhaust steam inlet 1 of the condenser body. The heating network water undergoes heat exchange and condensation through the corresponding condensate water chamber at the condensate section 15 and the corresponding cooling water chamber 3 at the cooling section 16. The upper condensate water chamber first exchanges heat and condenses with the heating network water, and then the lower cooling water chamber 3 exchanges heat and condenses with the heating network water, producing supercooled condensate. That is, the condensate produced by the condensate water chamber is further cooled by the cooling water chamber 3 to form supercooled condensate, which is discharged through the heating operation condensate outlet branch pipe 21. In the aforementioned process, in order to control the temperature of the condensate produced by the cooling water chamber 3, the temperature of the condensate in the cooling water chamber 3 is controlled by adjusting the first regulating valve 12. When the operating liquid level 17 in the condenser body is lower than the inlet water level 18 at the cooling section 16, the second regulating valve 13 needs to be opened to prevent the condensate pump from sucking in air.
[0029] Example 2 The present invention is a single-inlet, single-outlet wet-cooled unit condenser, which includes a condenser body, a circulating water inlet pipe, a circulating water outlet pipe, a heating network water inlet main pipe, a heating network water outlet main pipe, and a condensate outlet main pipe.
[0030] Specifically, inside the condenser body, there is a condensation section above the operating liquid level and a cooling section below the operating liquid level. The condensation section has a set of condensation water chambers, and the cooling section has a set of cooling water chambers.
[0031] The condensate section water chamber has a condensate inlet chamber and a condensate outlet chamber that form the flow path. These two chambers are connected by several cooling tube bundles arranged in the middle. The condensate inlet chamber has two ports for circulating water and heating network water to enter. The condensate outlet chamber has two ports for circulating water and heating network water to exit. In other words, the condensate section water chamber has two sets of ports corresponding to different operating conditions.
[0032] The cooling section water chamber has a hot water inlet and a hot water outlet that form the flow path. The hot water inlet and the hot water outlet are connected by several cooling tube bundles arranged in the middle. In addition, since condensate will be generated in the cooling section water chamber, a condensate outlet (which can be defined as the condensate outlet under heating conditions) is provided at the bottom of the cooling section water chamber.
[0033] In the above structure, the operation of the lower cooling section water chamber is independent of the upper condensate section water chamber. As the upper condensate section water chamber, the condensate it produces can either enter the cooling section water chamber or be directly discharged according to the operating conditions. Therefore, a condensate outlet port (which can be defined as the pure condensate condition condensate outlet port) is provided at the bottom of the condenser body, independent of the cooling section water chamber.
[0034] The circulating water inlet pipe is sealed to the circulating water inlet interface of the condensate section inlet chamber.
[0035] The circulating water outlet pipe is sealed to the circulating water outlet interface of the condensate section outlet chamber.
[0036] Corresponding to the aforementioned condensate section water chamber and cooling section water chamber, the main inlet pipe of the heating network water has branch pipes for the condensate section and cooling section. The branch pipes for the condensate section are sealed to the inlet interface of the condensate section water chamber, and the branch pipes for the cooling section are sealed to the inlet interface of the cooling section water chamber. In order to controllably adjust the temperature of the condensate water generated in the cooling section water chamber, a first regulating valve is installed on the branch pipes for the cooling section.
[0037] Corresponding to the aforementioned condensate section water chamber and cooling section water chamber, the main outlet pipe of the heating network water has branch pipes for heating network water through the condensate section and branch pipes for heating network water through the cooling section. The branch pipes for heating network water through the condensate section are sealed to the outlet interface of the heating network water in the condensate section water chamber, and the branch pipes for heating network water through the cooling section are sealed to the outlet interface of the heating network water in the cooling section water chamber.
[0038] The condensate outlet main pipe discharges condensate generated throughout the condenser body. Condensate is generated in the upper condensate chamber and the lower cooling chamber, corresponding to the aforementioned condensate generation path. The condensate outlet main pipe branches off to two different condensate outlet branches: one for pure condensation operation and one for heating operation. The pure condensate outlet branch is sealed to the condensate chamber of the condenser body (i.e., the pure condensate outlet port), and the heating operation branch is sealed to the condensate outlet port of the cooling chamber. A second regulating valve is installed on the pure condensate outlet branch pipe to facilitate switching and control between different operating modes.
[0039] The operation control of the above-mentioned dual-mode condenser (heating and pure condensing) includes the following two operating conditions: When operating under pure condensing conditions, the second regulating valve is opened to activate the circulating water process. Exhaust steam enters from the exhaust steam inlet of the condenser body, and circulating water undergoes heat exchange and condensation through the condensing section water chamber in the condensing section to produce saturated condensate. This saturated condensate does not need to be cooled again through the cooling section water chamber in the cooling section, but is directly discharged through the pure condensing condition condensate outlet branch pipe. During heating operation, the second regulating valve is closed, and the heating network water flow is activated. Exhaust steam enters from the exhaust steam inlet of the condenser body. The heating network water undergoes heat exchange and condensation in the condensate section water chamber and the cooling section water chamber, respectively. The upper condensate section water chamber first exchanges heat and condenses with the heating network water, and then the lower cooling section water chamber exchanges heat and condenses with the heating network water, producing supercooled condensate. That is, the condensate produced in the condensate section water chamber is further cooled by the cooling section water chamber to form supercooled condensate, which is discharged through the heating operation condensate outlet branch pipe. In the aforementioned process, the temperature of the condensate produced in the cooling section water chamber is controlled by adjusting the first regulating valve. When the operating liquid level in the condenser body is lower than the inlet liquid level in the cooling section, the second regulating valve needs to be opened to prevent the condensate pump from cavitating.
[0040] The above specific technical solutions are only used to illustrate the present invention, and are not intended to limit it.
[0041] Although the present invention has been described in detail with reference to the specific technical solutions described above, those skilled in the art should understand that modifications can still be made to the specific technical solutions described above, or equivalent substitutions can be made to some of the technical features, such as using a condenser cooled by circulating water in an indirect air-cooled unit; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.
Claims
1. A dual-mode condenser for heating and pure condensation, comprising a condenser body; Its features are: The condenser body has a condensation section (15) above the operating liquid level (17) and a cooling section (16) below the operating liquid level (17). At least one set of condensation section water chambers is provided at the condensation section (15). Each set of condensation section water chambers has a condensation section inlet water chamber (2) and a condensation section outlet water chamber (19) that constitute the inlet and outlet flow. The condensation section inlet water chamber (2) is provided with two interfaces for circulating water to enter and heating network water to enter. The condensation section outlet water chamber (19) is provided with two interfaces for circulating water to flow out and heating network water to flow out. At least one set of cooling section water chambers (3) is provided at the cooling section (16). Each set of cooling section water chambers (3) has a hot water inlet interface and a hot water outlet interface that constitute the inlet and outlet process, and each set of cooling section water chambers (3) has a condensate outlet interface.
2. The dual-mode condenser for heating and pure condensation according to claim 1, characterized in that: The condenser body is connected to the circulating water inlet pipe (4), the circulating water outlet pipe (8), the heating network water inlet main pipe (5), and the heating network water outlet main pipe (9); The circulating water inlet pipe (4) is sealed to the circulating water inlet interface of the condensation section inlet chamber (2); The circulating water outlet pipe (8) is sealed to the circulating water outlet interface of the condensate section outlet chamber (19); The main inlet pipe (5) of the heating network water leads out a branch pipe (6) for the condensate section of the heating network water and a branch pipe (7) for the cooling section of the heating network water. The branch pipe (6) for the condensate section of the heating network water is sealed to the inlet interface of the condensate section water inlet chamber (2), and the branch pipe (7) for the cooling section of the heating network water is sealed to the inlet interface of the cooling section water chamber (3). The main outlet pipe (9) of the heating network water leads out a branch pipe (10) for the outlet of the condensation section and a branch pipe (11) for the outlet of the cooling section. The branch pipe (10) for the outlet of the condensation section is sealed to the outlet port of the condensation section water chamber (19), and the branch pipe (11) for the outlet of the cooling section water chamber (3) is sealed to the outlet port of the cooling section water chamber (3).
3. The dual-mode condenser for heating and pure condensation according to claim 2, characterized in that: The condenser body is connected to the condensate outlet main pipe (14); The condensate outlet main pipe (14) leads out to a pure condensate outlet branch pipe (20) and a heating condensate outlet branch pipe (21). The pure condensate outlet branch pipe (20) is sealed to the condensate chamber of the condenser body, and the heating condensate outlet branch pipe (21) is sealed to the condensate outlet interface of the cooling section water chamber (3).
4. The dual-mode condenser for heating and pure condensation according to claim 3, characterized in that: A second regulating valve (13) is installed on the condensate outlet branch pipe (20) under pure condensation conditions.
5. The dual-mode condenser for heating and pure condensation according to claim 2, characterized in that: A first regulating valve (12) is installed on the branch pipe (7) of the cooling section of the heating network water inlet.
6. The dual-mode condenser for heating and pure condensation according to claim 1, 2 or 3, characterized in that: The condenser body has a double-inlet and double-outlet structure, with two relatively independent sets of condensation section water chambers in the condensation section (15) and two relatively independent sets of cooling section water chambers (3) in the cooling section (16).
7. The dual-mode condenser for heating and pure condensation according to claim 1, 2 or 3, characterized in that: The main body of the condenser is a wet-cooled unit condenser; Alternatively, the condenser may be a condenser cooled by circulating water in an indirect air-cooled unit.
8. A method for operating and controlling a dual-mode condenser (heating and pure condensing) as described in any one of claims 1 to 7, characterized in that: When operating under pure condensation conditions, open the second regulating valve to activate the circulating water process. The circulating water will achieve heat exchange and condensation through the corresponding condensation section water chamber at the condensation section. When the heating is in operation, the second regulating valve is closed and the heating network water flow is activated. The heating network water undergoes heat exchange and condensation through the corresponding condensate water chamber at the condensate section and the corresponding cooling water chamber at the cooling section. The upper condensate water chamber first exchanges heat and condenses with the heating network water, and then the lower cooling water chamber exchanges heat and condenses with the heating network water. During the process, the condensate water temperature of the cooling water chamber is controlled by the first regulating valve.
9. The operation control method for a dual-mode condenser (heating and pure condensing) according to claim 8, characterized in that: When the condenser is in heating operation, if the operating liquid level in the condenser body is lower than the inlet water level in the cooling section, the second regulating valve should be opened to prevent the condensate pump from sucking in air.