High-pressure feed water heater system
By designing a high-pressure feedwater heater system, using a ceramic jacket and hollow partition structure, the problem of insufficient number of high-pressure heaters was solved, the feedwater temperature was increased, power generation was increased and coal consumption was reduced, and safety hazards and economic issues were resolved.
Patent Information
- Application Number
- CN202422515131.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-17
AI Technical Summary
Under non-standard operation of three boilers and two generators, the number of high-pressure heaters in operation is insufficient, resulting in a drop in feedwater temperature, which affects the economic efficiency of the unit and poses safety hazards to boiler wall temperature adjustment and denitrification system operation.
Design a high-pressure feedwater heater system, which adopts a ceramic outer shell and an inner ceramic jacket structure, combined with a hollow partition and inner and outer seals. Steam is introduced into the inner ceramic jacket through a steam pipeline to heat the feedwater pipeline, thereby increasing the feedwater temperature through heat transfer. The steam flow is controlled by valves.
It effectively increases feedwater temperature, increases power generation, reduces coal consumption, minimizes the impact on boiler wall temperature adjustment and denitrification systems, and achieves energy conservation and emission reduction.
Smart Images
Figure CN223499535U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-pressure water supply technology for thermal power plants, specifically a high-pressure water supply heater system. Background Technology
[0002] During the non-heating season, a non-standard operation method of three boilers and two turbines is adopted, with the number of boilers in operation exceeding that of steam turbines.
[0003] Due to system configuration limitations, the number of high-pressure heaters in operation is insufficient under non-standard operating conditions. When high-pressure heaters from shut-down units are put into operation on the water side, the feedwater temperature drops, affecting the unit's economic efficiency and posing safety hazards to boiler wall temperature adjustment and denitrification system operation. Therefore, this does not meet the current requirements, and a high-pressure feedwater heater system is proposed. Utility Model Content
[0004] The purpose of this utility model is to provide a high-pressure feedwater heater system to solve the problem in the existing non-standard operation scheme of three boilers and two units mentioned in the background art that the number of high-pressure heaters in operation is insufficient, and the operation of the high-pressure heaters on the water side of the shut-down unit causes the feedwater temperature to drop, which not only affects the economic efficiency of the unit, but also poses safety hazards to the boiler wall temperature adjustment and denitrification system operation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure feedwater heater system, comprising: a high-pressure feedwater heater body, a steam inlet at the upper end of the high-pressure feedwater heater body, a connecting pipe fitting at the upper end of the steam inlet, a steam pipeline at the end of the connecting pipe fitting away from the steam inlet, a deaerator at one end of the steam pipeline, and an organic unit connected to one end of the deaerator via a pipeline; the high-pressure feedwater heater body includes a ceramic outer shell, an inner ceramic jacket inside the ceramic outer shell, and a serpentine feedwater pipeline inside the inner ceramic jacket.
[0006] Preferably, a hollow spacer is provided between the inner ceramic jacket and the outer ceramic shell.
[0007] Preferably, the water supply pipeline and the inner ceramic jacket are provided with two layers of sealing components, one inner and one outer.
[0008] Preferably, the lower end of the inner ceramic jacket is provided with a steam vent, and the lower end of the steam vent is provided with a heater connecting pipe connected to another heater.
[0009] Preferably, a condensate inlet and a condensate outlet are respectively provided on one side of the steam inlet and the steam outlet, and a water supply inlet and a water supply outlet are respectively provided at both ends of the water supply pipeline.
[0010] Preferably, a first electric valve is provided at the end of the connecting pipe fitting near the steam inlet, a pneumatic check valve is provided at the middle position of the connecting pipe fitting, and a manual valve is provided at the end of the connecting pipe fitting near the steam pipeline.
[0011] Preferably, a second electric valve is provided at the end of the steam pipeline near the deaerator.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. In this utility model, steam from the generator unit enters the deaerator, where the feedwater is heated to its saturation temperature at the corresponding working pressure, removing dissolved oxygen and other gases. During deaerator operation, the steam is transported outward through steam pipelines. Connecting pipe fittings allow the steam to enter the inner ceramic jacket from the steam inlet, heating the internal feedwater pipeline. The heated water in the feedwater pipeline is then discharged to the outside for use by the generator unit and other equipment. This structure effectively increases the feedwater temperature at the high-pressure feedwater heater, increases power generation, and reduces coal consumption, achieving energy conservation and emission reduction, and minimizing the impact on boiler wall temperature adjustment and the safe operation of the denitrification system. The inner ceramic jacket design reduces internal space, allowing steam to fully contact the feedwater pipeline and heat the water in the pipeline through heat transfer.
[0014] 2. The hollow partition can isolate gas and slow down the rate at which the temperature inside the jacket is transferred outward, thus achieving a heat preservation effect and improving the internal heating effect. The setting of inner and outer sealing elements can prevent internal steam from leaking into the outer hollow partition, further improving the sealing effect inside the jacket. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the external structure of the main body of the high-pressure water heater of this utility model;
[0017] Figure 3 This is a schematic diagram of the internal structure of the high-pressure water heater of this utility model;
[0018] Figure 4 This is a schematic diagram of the sealing component structure of this utility model;
[0019] In the diagram: 1. High-pressure feedwater heater body; 2. Steam inlet; 3. Connecting pipe fittings; 4. Steam pipeline; 5. Deaerator; 6. Unit; 7. Drain inlet; 8. Drain outlet; 9. Feedwater inlet; 10. Feedwater outlet; 11. First electric valve; 12. Pneumatic check valve; 13. Manual valve; 14. Exhaust port; 15. Heater connecting pipe; 16. Ceramic outer shell; 17. Inner ceramic jacket; 18. Hollow partition; 19. Feedwater pipeline; 20. Sealing element; 21. Second electric valve. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] Please see Figure 1-4 This utility model provides an embodiment of a high-pressure feedwater heater system, comprising: a high-pressure feedwater heater body 1, a steam inlet 2 at the upper end of the high-pressure feedwater heater body 1, a connecting pipe 3 at the upper end of the steam inlet 2, a steam pipeline 4 at the end of the connecting pipe 3 away from the steam inlet 2, a deaerator 5 at one end of the steam pipeline 4, and a unit 6 connected to one end of the deaerator 5 via a pipeline; the high-pressure feedwater heater body 1 includes a ceramic outer shell 16, an inner ceramic jacket 17 inside the ceramic outer shell 16, and a serpentine feedwater pipeline 19 inside the inner ceramic jacket 17; steam from the unit 6 enters the deaerator 5, and the feedwater is heated to the saturation temperature at the corresponding working pressure by the deaerator 5, removing dissolved substances. During the operation of the deaerator 5, the oxygen and other gases in the feedwater are transported outward through the steam pipeline 4. Through the connection of the connecting pipe fitting 3, the steam enters the inner ceramic jacket 17 from the steam inlet 2, heating the internal feedwater pipeline 19. The heated water in the feedwater pipeline 19 is then discharged to the outside for use by the unit 6 and other equipment. The above structure can effectively increase the feedwater temperature at the high-pressure feedwater heater, increase power generation, and reduce coal consumption, achieving the purpose of energy conservation and emission reduction, and reducing the impact on boiler wall temperature adjustment and the safe operation of the denitrification system. The use of the inner ceramic jacket 17 can reduce the internal space, allowing the steam to fully contact the feedwater pipeline 19, and heat the water in the pipeline through heat transfer.
[0022] A hollow partition 18 is provided between the inner ceramic jacket 17 and the ceramic outer shell 16, and two layers of sealing elements 20 are provided between the water supply pipe 19 and the inner ceramic jacket 17. The hollow partition 18 can isolate gas and slow down the rate at which the temperature inside the jacket is transferred to the outside, thereby achieving a heat preservation effect and improving the internal heating effect. The two layers of sealing elements 20 can prevent internal steam from leaking into the outer hollow partition 18, further improving the sealing effect inside the jacket.
[0023] Please see Figure 2 , Figure 3 The lower end of the inner ceramic jacket 17 is provided with a steam vent 14, and the lower end of the steam vent 14 is provided with a heater connecting pipe 15 connected to another heater. The steam inlet 2 and the steam vent 14 are respectively provided with a condensate inlet 7 and a condensate outlet 8 on one side. The two ends of the water supply pipe 19 are respectively provided with a water supply inlet 9 and a water supply outlet 10. The steam vent 14 can discharge the internal steam, and through the conveying of the heater connecting pipe 15, the steam is sent into another heater to realize the further utilization of high temperature steam.
[0024] Please see Figure 1 , Figure 2 A first electric valve 11 is installed at the end of the connecting pipe 3 near the steam inlet 2, a pneumatic check valve 12 is installed in the middle of the connecting pipe 3, a manual valve 13 is installed at the end of the connecting pipe 3 near the steam pipeline 4, and a second electric valve 21 is installed at the end of the steam pipeline 4 near the deaerator 5. The first electric valve 11 controls the opening and closing state of the steam inlet 2, the pneumatic check valve 12 prevents steam backflow, the manual valve 13 controls the connection state between the steam pipeline 4 and the connecting pipe 3, and the second electric valve 21 controls the connection state between the steam pipeline 4 and the deaerator 5. The above-mentioned multiple valves allow users to easily switch the steam flow state, control the steam volume at the heater, and improve the safety of the pipelines.
[0025] Working principle: During use, the feedwater is heated to the saturation temperature at the corresponding working pressure through the deaerator 5 to remove dissolved oxygen and other gases. During the operation of the deaerator 5, its steam is transported outward through the steam pipeline 4. Through the connection of the connecting pipe fitting 3, the steam enters the inner ceramic jacket 17 from the steam inlet 2 to heat the internal feedwater pipeline 19. The water in the feedwater pipeline 19 is then discharged to the outside for use by the unit 6 and other equipment. The exhaust port 14 can discharge the internal steam. Through the heater connecting pipe 15, the steam is sent to another heater to achieve further utilization of the high-temperature steam.
[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A high-pressure feedwater heater system, comprising a high-pressure feedwater heater body (1), characterized in that: The upper end of the high-pressure water heater body (1) is provided with a steam inlet (2), and the upper end of the steam inlet (2) is provided with a connecting pipe (3). The end of the connecting pipe (3) away from the steam inlet (2) is provided with a steam pipeline (4). The end of the steam pipeline (4) is provided with a deaerator (5). The end of the deaerator (5) is connected to an organic unit (6) through a pipeline. The high-pressure water heater body (1) includes a ceramic outer shell (16). The inner ceramic jacket (17) is provided inside the ceramic outer shell (16). The inner ceramic jacket (17) is provided with a serpentine water supply pipeline (19).
2. The high-pressure feedwater heater system according to claim 1, characterized in that: A hollow partition (18) is provided between the inner ceramic jacket (17) and the ceramic outer shell (16).
3. A high-pressure feedwater heater system according to claim 2, characterized in that: The water supply pipe (19) and the inner ceramic jacket (17) are provided with two layers of sealing elements (20).
4. A high-pressure feedwater heater system according to claim 1, characterized in that: The lower end of the inner ceramic jacket (17) is provided with a steam vent (14), and the lower end of the steam vent (14) is provided with a heater connecting pipe (15) connected to another heater.
5. A high-pressure feedwater heater system according to claim 1, characterized in that: A condensate inlet (7) and a condensate outlet (8) are respectively provided on one side of the steam inlet (2) and the steam outlet (14), and a water supply inlet (9) and a water supply outlet (10) are respectively provided at both ends of the water supply pipeline (19).
6. A high-pressure feedwater heater system according to claim 1, characterized in that: The connecting pipe fitting (3) is provided with a first electric valve (11) at one end near the steam inlet (2), a pneumatic check valve (12) is provided at the middle position of the connecting pipe fitting (3), and a manual valve (13) is provided at one end of the connecting pipe fitting (3) near the steam pipeline (4).
7. A high-pressure feedwater heater system according to claim 1, characterized in that: A second electric valve (21) is installed at one end of the steam pipeline (4) near the deaerator (5).