Cooling water recycling system
By installing a heater group between the slag cooler group and the deaerator, the high-temperature water discharged from the slag cooler is heated, which solves the problem of unstable operation of the deaerator and ensures the safety of the cooling water recovery system and the service life of the deaerator.
Patent Information
- Application Number
- CN202520169800.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-24
AI Technical Summary
The temperature difference between the high-temperature water discharged from the slag cooler and the operating temperature of the deaerator is large, which leads to unstable operation of the deaerator, affecting the safety of the cooling water recovery system and the service life of the deaerator.
A heater group is installed between the slag cooler group and the deaerator. The heater group heats the high-temperature water discharged from the slag cooler to match its temperature with the operating temperature of the deaerator, thereby eliminating the vibration of the deaerator and ensuring its stable operation.
The use of heater units achieves a match between the high-temperature water temperature and the deaerator temperature, eliminates deaerator vibration, and improves the safety of the cooling water recovery system and the service life of the deaerator.
Smart Images
Figure CN223807180U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to water circulation utilization technical field relates to cooling water recycling technology, concretely is a kind of cooling water recycling system. BACKGROUND
[0002] The slag cooler is a high-temperature heat exchanger that can cool a large amount of ash in the boiler flue to a certain temperature within a certain period of time. The slag cooler is composed of a cylinder, a slag inlet box, a slag outlet box, a power transmission device, a chassis and an electrical control system. The cylinder and the partition frame are both of a water-cooled wall type structure. The inner wall of the cylinder and the partition frame are both welded with slag guide plates. Under the condition that the diameter and length of the cylinder are constant, the slag guide plates can expand the slag passage cross-sectional area, which is beneficial to improve the slag discharge capacity and the heat exchange area.
[0003] Generally, the slag cooler exchanges heat with high-temperature ash through cooling water. After the cooling water enters the slag cooler and exchanges heat with the high-temperature ash, high-temperature water is formed. The high-temperature water is returned to the deaerator for deoxygenation. After deoxygenation, the high-temperature water is cooled and recycled.
[0004] In actual operation, the working temperature of the deaerator is 140-158°C. However, the temperature of the high-temperature water discharged from the slag cooler is generally only 70-75°C. The difference between the working temperature of the deaerator and the temperature of the high-temperature water discharged from the slag cooler is large, which can cause large fluctuations in the pressure and water level of the deaerator, resulting in vibration of the deaerator and unstable operation of the deaerator. This can cause the dissolved oxygen content of the deaerator to exceed the standard, which can affect the safety of the cooling water recycling system and the service life of the deaerator during long-term operation. UTILITY MODEL CONTENTS
[0005] In view of the above background technology, the existing technology has the technical problem of unstable operation of the deaerator when recycling the high-temperature water discharged from the slag cooler due to the large difference between the working temperature of the deaerator and the temperature of the high-temperature water discharged from the slag cooler. To solve this technical problem, the utility model provides a cooling water recycling system.
[0006] The utility model sets a heater group between the slag cooler group and the deaerator. The heater group heats the high-temperature water discharged from the slag cooler, so that the temperature of the high-temperature water entering the deaerator matches the working temperature of the deaerator. This can eliminate the vibration of the deaerator and ensure the stability of the deaerator operation, thereby ensuring the safety of the cooling water recycling system and the service life of the deaerator.
[0007] To solve the above technical problems, the utility model provides the following technical scheme:
[0008] The utility model relates to a cooling water recycling system, including the cold residue ware group, the cooling water recycling system still includes heater group and deaerator, the cold residue ware group passes through heater group and is communicated with deaerator, the high temperature water of the cold residue ware group is entered deaerator after heating through heater group.
[0009] Further limit, the cooling water recycling system includes the condensate water inlet pipe that communicates with the import of the cold residue ware group, the outlet pipe that communicates with the export of the cold residue ware group and the backwater pipe that communicates with the outlet pipe, the backwater pipe communicates with deaerator, and the heater group is communicated on the backwater pipe.
[0010] Further limit, the heater group includes primary heater and secondary heater, and the primary heater and the secondary heater are in series on the backwater pipe.
[0011] Further limit, the primary heater is communicated with primary heater inlet pipe and primary heater outlet pipe, and the import of the primary heater is communicated with the backwater pipe through the primary heater inlet pipe, and the export of the primary heater is communicated with the backwater pipe through the primary heater outlet pipe.
[0012] The secondary heater is communicated with secondary heater inlet pipe and secondary heater outlet pipe, and the import of the secondary heater is communicated with the backwater pipe through the secondary heater inlet pipe, and the export of the secondary heater is communicated with the backwater pipe through the secondary heater outlet pipe.
[0013] Further limit, the primary heater inlet pipe is provided with the fifth valve body, and the primary heater outlet pipe is provided with the sixth valve body.
[0014] The secondary heater inlet pipe is provided with the eighth valve body, and the secondary heater outlet pipe is provided with the ninth valve body.
[0015] Further limit, the backwater pipe is provided with the fourth valve body and the seventh valve body, the fourth valve body is arranged between the primary heater inlet pipe and the primary heater outlet pipe, and the seventh valve body is arranged between the secondary heater inlet pipe and the secondary heater outlet pipe.
[0016] Further limit, the top of the primary heater and the top of the secondary heater are provided with top exhaust components, the side of the primary heater and the side of the secondary heater are provided with side exhaust components, and the bottom of the primary heater and the bottom of the secondary heater are provided with bottom drainage components.
[0017] Further limit, the primary heater and the secondary heater are provided with temperature gauge / pressure gauge.
[0018] Further limited, the cold slag group includes a plurality of parallel cold slag, the condensate water inlet pipe is provided with a plurality of water inlet branch pipes corresponding to the number of cold slag, the outlet pipe is provided with a plurality of cold slag outlet branch pipes corresponding to the number of cold slag; The inlet of each cold slag is communicated with the condensate water inlet pipe through the corresponding water inlet branch pipe, and the outlet of each cold slag is communicated with the outlet pipe through the corresponding cold slag outlet branch pipe.
[0019] Further limited, the water return pipe includes a first water return pipe and a second water return pipe, the outlet pipe is communicated with the deaerator through the first water return pipe, the outlet pipe is communicated with the deaerator through the second water return pipe, and the heater group is communicated on the second water return pipe.
[0020] Compared with the prior art, the utility model has the advantages that:
[0021] 1, a cooling water recycling system, it includes cold slag group, heater group and deaerator, it is in the cold slag group and deaerator between setting heater group, through heater group to the high temperature water of cold slag discharge heating, make the high temperature water temperature of entering deaerator and the working temperature of deaerator match, to eliminate the vibration of deaerator, ensure the stability of deaerator operation, to guarantee the safety of cooling water recycling system and the service life of deaerator.
[0022] 2, in the utility model, the inlet of cold slag group is communicated with the condensate water inlet pipe, and the outlet of cold slag group is communicated with the outlet pipe, and the condensate water in the condensate water inlet pipe is circulated as the condensate water of steam turbine, as the cooling water of cold slag group, after flowing through the cold slag, the high temperature water is heated by the heater group, and the temperature is increased, and the high temperature water is entered into the deaerator, and after being treated by the deaerator, the high temperature water is recycled as the water of steam turbine or is cooled as the cooling water and is recycled, to realize the recycling of cooling water.
[0023] 3, in the utility model, the heater group includes a primary heater and a secondary heater, and the high temperature water discharged by the cold slag is heated by the primary heater and the secondary heater, so that the heating effect of the high temperature water is improved. ACCURACY
[0024] Figure 1 It is a schematic diagram of the cooling water recycling system of the utility model;
[0025] Figure 2 It is a schematic diagram of the primary heater or secondary heater;
[0026] In the figure, 1 - condensate water inlet pipe, 101 - water inlet branch pipe, 2 - slag cooler, 3 - water outlet main pipe, 301 - slag cooler water outlet branch pipe, 4 - first valve body, 5 - first return pipe, 6 - second valve body, 7 - second return pipe, 8 - third valve body, 9 - fourth valve body, 10 - fifth valve body, 11 - first heater water inlet pipe, 12 - first heater water outlet pipe, 13 - sixth valve body, 14 - seventh valve body, 15 - eighth valve body, 16 - second heater water inlet pipe, 17 - second heater, 18 - second heater water outlet pipe, 19 - ninth valve body, 20 - tenth valve body, 21 - deaerator, 22 - first heater, 23 - thermometer / pressure gauge, 24 - top exhaust assembly, 25 - side exhaust assembly, 26 - bottom drainage assembly. DETAILED DESCRIPTION
[0027] The technical scheme of the utility model will be further explained and described below in combination with the drawings and embodiments, but the utility model is not limited to the following described embodiments.
[0028] Referring to Figure 1 The cooling water recycling system comprises a slag cooler group, a heater group and a deaerator 21, the slag cooler group is communicated with the deaerator 21 through the heater group, and high-temperature water discharged from the slag cooler group enters the deaerator 21 after being heated by the heater group.
[0029] The cooling water recycling system comprises a condensate water inlet pipe 1 communicated with the inlet of the slag cooler group, a water outlet main pipe 3 communicated with the outlet of the slag cooler group and a return pipe communicated with the water outlet main pipe 3, the return pipe is communicated with the deaerator 21, and the heater group is communicated on the return pipe and used for heating high-temperature water in the return pipe.
[0030] In the utility model, the slag cooler group comprises a plurality of slag coolers 2 arranged in parallel, the condensate water inlet pipe 1 is provided with a plurality of water inlet branch pipes 101 corresponding to the number of the slag coolers 2, and the water outlet main pipe 3 is provided with a plurality of slag cooler water outlet branch pipes 301 corresponding to the number of the slag coolers 2; the inlet of each slag cooler 2 is communicated with the condensate water inlet pipe 1 through the corresponding water inlet branch pipe 101, and the outlet of each slag cooler 2 is communicated with the water outlet main pipe 3 through the corresponding slag cooler water outlet branch pipe 301. The number of the slag coolers 2 can be 2, 3, 4, 5 or more, specifically, the number of the slag coolers 2 is set according to the amount of ash in the boiler flue to be cooled, and the utility model is not specifically limited. In Figure 1In the utility model, as one preferred embodiment of the utility model, the number of the slag coolers 2 is 4, one water inlet branch pipe 101 is correspondingly arranged at the inlet of each slag cooler 2, and one slag cooler water outlet branch pipe 301 is correspondingly arranged at the outlet of each slag cooler 2, so that the inlet of each slag cooler 2 is communicated with the outlet of the condensate water inlet pipe 1 through the water inlet branch pipe 101, and the outlet of each slag cooler 2 is communicated with the inlet of the water outlet main pipe 3 through the slag cooler water outlet branch pipe 301.
[0031] In the utility model, the first valve body 4 is communicated on the water outlet main pipe 3.
[0032] In the utility model, the heater group includes a first heater 22 and a second heater 17, and the first heater 22 and the second heater 17 are connected in series on the water return pipe.
[0033] It should be noted that the heaters included in the heater group in the utility model are not limited to two levels, and can also include three levels, four levels and the like, specifically, the number of the heaters is determined according to the heating demand of high-temperature water, and the structure of each heater is the same.
[0034] In the utility model, the water return pipe includes a first water return pipe 5 and a second water return pipe 7, the water outlet main pipe 3 is communicated with the deaerator 21 through the first water return pipe 5, the water outlet main pipe 3 is communicated with the deaerator 21 through the second water return pipe 7, and the heater group is communicated on the second water return pipe 7. Specifically, the outlet of the water outlet main pipe 3 is communicated with the inlet of the first water return pipe 5 and the inlet of the second water return pipe 7, the outlet of the first water return pipe 5 is communicated with the inlet of the deaerator 21, and the outlet of the second water return pipe 7 is communicated with the inlet of the deaerator 21 through the heater group. Among them, the second water return pipe 7 is the main water return pipe, and the first water return pipe 5 is the standby water return pipe, when the main water return pipe or the heater group fails, the first water return pipe 5 is started for temporary use.
[0035] Referring to Figure 2 In the utility model, the first heater 22 is communicated with a first heater water inlet pipe 11 and a first heater water outlet pipe 12, the inlet of the first heater 22 is communicated with the outlet of the second water return pipe 7 through the first heater water inlet pipe 11, and the outlet of the first heater 22 is communicated with the inlet of the second water return pipe 7 through the first heater water outlet pipe 12; the second heater 17 is communicated with a second heater water inlet pipe 16 and a second heater water outlet pipe 18, the inlet of the second heater 17 is communicated with the outlet of the second water return pipe 7 through the second heater water inlet pipe 16, and the outlet of the second heater 17 is communicated with the outlet of the second water return pipe 7 through the second heater water outlet pipe 18.
[0036] The utility model discloses a first heater water inlet pipe 11 is provided with the fifth valve body 10, and the first heater water outlet pipe 12 is provided with the sixth valve body 13, and the second heater water inlet pipe 16 is provided with the eighth valve body 15, and the second heater water outlet pipe 18 is provided with the ninth valve body 19.
[0037] The utility model discloses a second backwater pipe 7 is provided with the fourth valve body 9 and the seventh valve body 14, and the fourth valve body 9 sets up between the first heater water inlet pipe 11 and the first heater water outlet pipe 12, and the seventh valve body 14 sets up between the second heater water inlet pipe 16 and the second heater water outlet pipe 18, specifically, the fourth valve body 9 and the seventh valve body 14 normal work are closed, only when the first heater 22, the first heater water inlet pipe 11, the first heater water outlet pipe 12, the second heater 17, the second heater water inlet pipe 16 and / or the second heater water outlet pipe 18 appear the fault, only then start corresponding fourth valve body 9 and the seventh valve body 14 temporary use.
[0038] Preferably, the utility model discloses a second backwater pipe 7 still is provided with the third valve body 8 and the tenth valve body 20, wherein, the third valve body 8 is located before the import of the first heater water inlet pipe 11, and the tenth valve body 20 is located after the export of the second heater water outlet pipe 18, namely the tenth valve body 20 sets up between the second heater water outlet pipe 18 and the deaerator 21.
[0039] The utility model discloses a second backwater pipe 5 is provided with the second valve body 6.
[0040] The utility model discloses a first heater 22's top and the top of second heater 17 all are provided with top exhaust component 24, and the side of first heater 22 and the side of second heater 17 all are provided with side exhaust component 25, and the bottom of first heater 22 and the bottom of second heater 17 all are provided with bottom drainage component 26, and top exhaust component 24 and bottom drainage component 26 all are used for discharging the excess air in first heater 22 and second heater 17.
[0041] The utility model discloses a first heater 22 and second heater 17 all are provided with thermometer / pressure gauge 23, for measuring the pressure or temperature on first heater 22 and second heater 17.
[0042] The utility model discloses a kind of cooling water recycling systems, and its working principle is as follows: condensed water (temperature is 50-60 DEG C) discharged from steam turbine unit enters condensed water inlet pipe 1, condensed water inlet pipe 1 is heated to the corresponding cold slag exchanger 2 and ash in boiler flue by inlet branch pipe 101, form high-temperature water, from cold slag outlet branch pipe 301 discharge into outlet pipe 3, from outlet pipe 3 into second backwater pipe 7, wherein, the outlet temperature of cold slag exchanger 2 is 70 DEG C and 75 DEG C, after being heated by primary heater outlet pipe 12 and secondary heater 17, enter deaerator 21 and carry out deaeration treatment, after treatment, as steam turbine water for recycling or after cooling as cooling water for recycling, realize the recycling of cooling water.
[0043] The utility model discloses a kind of cooling water recycling systems, and its working principle is as follows: condensed water (temperature is 50-60 DEG C) discharged from steam turbine unit enters condensed water inlet pipe 1, condensed water inlet pipe 1 is heated to the corresponding cold slag exchanger 2 and ash in boiler flue by inlet branch pipe 101, form high-temperature water, from cold slag outlet branch pipe 301 discharge into outlet pipe 3, from outlet pipe 3 into second backwater pipe 7, wherein, the outlet temperature of cold slag exchanger 2 is 70 DEG C and 75 DEG C, after being heated by primary heater outlet pipe 12 and secondary heater 17, enter deaerator 21 and carry out deaeration treatment, after treatment, as steam turbine water for recycling or after cooling as cooling water for recycling, realize the recycling of cooling water.
[0044] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.
Claims
1. A cooling water recycling system comprising a group of slag coolers, characterized by, The cooling water recycling system further comprises a heater group and a deaerator (21), the slag cooler group is communicated with the deaerator (21) through the heater group, and the high-temperature water discharged by the slag cooler group enters the deaerator (21) after being heated by the heater group.
2. The cooling water recycling system according to claim 1, characterized by The cooling water recycling system comprises a condensate water inlet pipe (1) communicated with the inlet of the slag cooler group, a water outlet main pipe (3) communicated with the outlet of the slag cooler group, and a water return pipe communicated with the water outlet main pipe (3), the water return pipe being communicated with the deaerator (21), and the heater group being communicated on the water return pipe.
3. The cooling water recycling system according to claim 2, characterized by The heater group comprises a first-stage heater (22) and a second-stage heater (17), and the first-stage heater (22) and the second-stage heater (17) are connected in series on the water return pipe.
4. The cooling water recycling system according to claim 3, characterized by The first-stage heater (22) is communicated with a first-stage heater water inlet pipe (11) and a first-stage heater water outlet pipe (12), the inlet of the first-stage heater (22) is communicated with the water return pipe through the first-stage heater water inlet pipe (11), and the outlet of the first-stage heater (22) is communicated with the water return pipe through the first-stage heater water outlet pipe (12). The second-stage heater (17) is communicated with a second-stage heater water inlet pipe (16) and a second-stage heater water outlet pipe (18), the inlet of the second-stage heater (17) is communicated with the water return pipe through the second-stage heater water inlet pipe (16), and the outlet of the second-stage heater (17) is communicated with the water return pipe through the second-stage heater water outlet pipe (18).
5. The cooling water recycling system according to claim 4, characterized by The first-stage heater water inlet pipe (11) is provided with a fifth valve body (10), and the first-stage heater water outlet pipe (12) is provided with a sixth valve body (13). The second-stage heater water inlet pipe (16) is provided with an eighth valve body (15), and the second-stage heater water outlet pipe (18) is provided with a ninth valve body (19).
6. The cooling water recycling system according to claim 4, characterized by The water return pipe is provided with a fourth valve body (9) and a seventh valve body (14), the fourth valve body (9) is arranged between the first-stage heater water inlet pipe (11) and the first-stage heater water outlet pipe (12), and the seventh valve body (14) is arranged between the second-stage heater water inlet pipe (16) and the second-stage heater water outlet pipe (18).
7. The cooling water recycling system according to any one of claims 3 to 6, characterized by The top of the first-stage heater (22) and the top of the second-stage heater (17) are provided with a top exhaust assembly (24), the side of the first-stage heater (22) and the side of the second-stage heater (17) are provided with a side exhaust assembly (25), and the bottom of the first-stage heater (22) and the bottom of the second-stage heater (17) are provided with a bottom drainage assembly (26).
8. The cooling water recycling system according to claim 7, characterized by The first-stage heater (22) and the second-stage heater (17) are provided with a thermometer / pressure gauge (23).
9. The cooling water recycling system according to claim 2, characterized by The cold slag device set comprises a plurality of parallel cold slag devices (2), a plurality of water inlet branch pipes (101) corresponding to the number of the cold slag devices (2) are arranged on the condensed water inlet pipe (1), and a plurality of cold slag water outlet branch pipes (301) corresponding to the number of the cold slag devices (2) are arranged on the water outlet main pipe (3); the inlet of each cold slag device (2) is communicated with the condensed water inlet pipe (1) through the corresponding water inlet branch pipe (101), and the outlet of each cold slag device (2) is communicated with the water outlet main pipe (3) through the corresponding cold slag water outlet branch pipe (301).
10. The cooling water recycling system according to claim 9, wherein The water return pipe comprises a first water return pipe (5) and a second water return pipe (7), the water outlet main pipe (3) is communicated with the deaerator (21) through the first water return pipe (5), the water outlet main pipe (3) is communicated with the deaerator (21) through the second water return pipe (7), and the heater set is communicated on the second water return pipe (7).