CN117005917A - Circulating water energy-saving system for non-contact main pipe and operation method - Google Patents
Circulating water energy-saving system for non-contact main pipe and operation method Download PDFInfo
- Publication number
- CN117005917A CN117005917A CN202310740643.9A CN202310740643A CN117005917A CN 117005917 A CN117005917 A CN 117005917A CN 202310740643 A CN202310740643 A CN 202310740643A CN 117005917 A CN117005917 A CN 117005917A
- Authority
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- China
- Prior art keywords
- water
- pipe
- machine oil
- oil cooler
- circulating water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000010721 machine oil Substances 0.000 claims abstract description 39
- 239000008235 industrial water Substances 0.000 claims abstract description 28
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims 1
- 239000000498 cooling water Substances 0.000 abstract description 19
- 239000010687 lubricating oil Substances 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 238000004134 energy conservation Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001584775 Tunga penetrans Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a circulating water energy-saving system and an operation method for a non-connection main pipe, wherein the circulating water energy-saving system comprises a first large-machine oil cooler and a second large-machine oil cooler which are arranged in pairs, both ends of the first large-machine oil cooler and the second large-machine oil cooler are respectively connected with an open water inlet pipe and an open water outlet pipe, the open water inlet pipes are connected with a circulating water pump, the open water inlet pipes are all connected with the water outlet ends of communicating pipes in parallel, the water inlet ends of the communicating pipes are connected with a reuse water return pipe and an industrial water pipe in parallel, the open water inlet pipes and the industrial water pipe are all connected with a water purifying station, and the reuse water return pipe is connected with an industrial pool. The invention has the effect of saving the consumption of the cooling water and the consumption of the electric energy for supplying the cooling water.
Description
Technical Field
The invention relates to the technical field of circulating water energy conservation, in particular to a circulating water energy conservation system without a connecting main pipe and an operation method.
Background
In thermal power enterprises, a circulating water system is an important cooling system. The circulating water enters the condenser at the tail end of the steam turbine, and the steam from the steam turbine is cooled and condensed into water, so that a pressure difference is formed between the steam inlet of the steam turbine and the steam exhaust at the tail end, high-pressure steam can flow from the cylinder body of the steam turbine quickly, and the blades are blown, so that the steam turbine rotates. The circulating water after cooling the steam becomes hot and returns to the cooling tower for cooling and then circulates again; meanwhile, the circulating water also provides cooling water for other rotary machine equipment of the generator set, so that the temperature of working media is reduced, and the working media can safely and stably run in a designed temperature range.
Usually, each unit is provided with a secondary water supply system of a natural ventilation cooling tower, a unit operation mode is adopted, circulating water of the cooling tower is pumped into a condenser by a circulating water pump, and after the cooling unit is exhausted, the circulating water is discharged to a cooling tower through a water return main pipe and is naturally cooled.
After the single machine is stopped, the rotor of the steam turbine still needs to maintain the turning state, so that the matched oil system needs to be maintained to operate, and the oil temperature also needs to meet the requirements of turning, so that the single machine is stopped or the double machines are stopped, and then a circulating water pump still needs to be maintained to operate to control the lubricating oil temperature, thereby causing the waste of energy sources.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a circulating water energy-saving system without a connecting main pipe and an operation method thereof, which solve the problem of energy waste caused by the fact that at least one circulating water pump still needs to be maintained after a steam turbine is stopped in the prior art.
According to the embodiment of the invention, the circulating water energy-saving system for the non-contact main pipe comprises a first large-machine oil cooler and a second large-machine oil cooler which are arranged in pairs, wherein both ends of the first large-machine oil cooler and the second large-machine oil cooler are respectively connected with an open water inlet pipe and an open water outlet pipe, the open water inlet pipes are connected with a circulating water pump, the open water inlet pipes are all connected with the water outlet ends of communicating pipes in parallel, the water inlet ends of the communicating pipes are connected with a reuse water return pipe and an industrial water pipe in parallel, the open water inlet pipes and the industrial water pipe are all connected with a water purifying station, and the reuse water return pipe is connected with an industrial water tank.
Preferably, the water inlet end of the communicating pipe is also connected with a fire-fighting water pipe in parallel, and the fire-fighting water pipe is connected with the industrial water pool
Preferably, a self-supporting pressure stabilizing valve is arranged at the connecting end of the fire-fighting water pipe and the communicating pipe.
Preferably, the internal water pressure of the reuse water return pipe and the industrial water pipe is smaller than the water pressure of the open type water inlet pipe in operation.
An operation method for a circulating water energy-saving system without a connecting main pipe comprises the following steps:
step one: after the steam turbine corresponding to the first large-machine oil cooler is stopped, maintaining the operation of a circulating water pump of the steam turbine corresponding to the second large-machine oil cooler, and supplying circulating water by the circulating water pump through an open water inlet pipe and supplying circulating water to the first large-machine oil cooler through a communicating pipe;
step two: after the two turbines are stopped, the corresponding circulating water pumps are closed, water is supplied to the communicating pipes through the reuse water return pipe and the industrial water pipe, the communicating pipes supply water to the two first large-machine oil coolers and the second large-machine oil cooler, and the reuse water return pipe supplies water through the circulating water systems of other turbines which normally operate;
step three: after the power failure of the whole factory, the communicating pipe is supplied with water through the fire-fighting water pipe, and the fire-fighting water pipe supplies energy through the diesel fire-fighting water pump.
Compared with the prior art, the invention has the following beneficial effects:
the rated power of the circulating water pump is 3800KW, the station service power ratio of a single circulating pump under the full load working condition of the unit is 0.38 percent, and the station service power ratio can be reduced by 0.38 percent at least under the condition that two turbines are stopped once; when the double-machine is stopped, after the two circulating water pumps are stopped, the two first large machine oil coolers and the second large machine oil coolers are supplied with water through the multiplexing water return pipe and the industrial water pipe, lubricating oil is cooled, normal use of the lubricating oil in the stopping state of the steam turbine is met, and production cost is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the above figures: 1. a fire hose; 2. a reuse water return pipe; 3. industrial water pipes; 4. a communicating pipe; 5. an open water inlet pipe; 6. a first main machine oil cooler; 7. a second large machine oil cooler; 8. an open type water outlet pipe.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1. The invention provides a circulating water energy-saving system for a non-connecting main pipe, which comprises a first large-machine oil cooler 6 and a second large-machine oil cooler 7 which are arranged in pairs, wherein both ends of the first large-machine oil cooler 6 and the second large-machine oil cooler 7 are respectively connected with an open water inlet pipe 5 and an open water outlet pipe 8, the open water inlet pipe 5 is connected with a circulating water pump, the open water inlet pipes 5 are all connected in parallel with the water outlet end of a communicating pipe 4, the water inlet end of the communicating pipe 4 is connected with a reuse water return pipe 2 and an industrial water pipe 3 in parallel, the open water inlet pipe 5 and the industrial water pipe 3 are both connected with a water purifying station, and the reuse water return pipe is connected with an industrial water pool.
Taking a certain thermal power plant as an example, in the three-phase engineering, two turbine units are built, after the turbine jigger is stopped, the two turbine units are all except for double stop, the reuse water backwater is always available, and the reuse water backwater pipe 2 can provide stable cooling water for the first large-machine oil cooler 6 and the second large-machine oil cooler 7 of the turbine in a stopped state.
The maximum pressure of the lubricating oil cooling water is not more than 0.45MPa when the lubricating oil cooling water runs, and the pressure of the water source is not more than 0.45MPa in consideration of the pressure resistance of the cooling water pipe. Through field inspection, the pressure of the three-stage industrial water pipe 3 is 0.35MPa during normal operation, the water pressure of the two-stage reuse water return pipe 2 is 0.2MPa, and the supply condition of lubricating oil cooling water is met.
The rated power of the circulating water pump is 3800KW, the running of the circulating water pump is required to be maintained to control the temperature of turbine lubricating oil within a specified range after the double-machine unit is stopped under the assumption that the time of the double-machine unit stopping at each three-period is 10 days, the power consumption during the double-machine unit stopping is 3800KW, 24 x 10= 912000 kW.h, and if the power price of the power plant millions of machine units on the internet is 0.416 yuan/kW.h, the economic cost can be saved about 38 ten thousand yuan each time when the double-machine unit is stopped.
After the double-machine is stopped, the operation of a circulating water pump is required to be maintained according to the original mode, during the operation of the circulating water pump, the three-period industrial water is required to be maintained to provide cooling water for the circulating water pump, and after the cooling water quantity during the operation of the single circulating water pump is stopped by calculating the water pump, the change of the total flow of the three-period industrial water of the cooling water gate is closed, so that the following table is obtained:
as can be seen from the above table, when the cooling water amount of one hour takes the intermediate value of about 50T/H during the operation of the single circulating water pump, the two machines are shut down for 10 days, so that the three-stage industrial water amount of 50×24×10=12000T can be reduced, that is, after the water supply line after the steam turbine is shut down is replaced, the consumption of 12000 tons of industrial water can be reduced by 10 days of shutdown.
As a preferred embodiment of the invention, the turbine lubricating oil is cooled effectively in the state of complete station service power outage. The water inlet end of the communicating pipe 4 is also connected with a fire-fighting water pipe 1 in parallel, and the fire-fighting water pipe 1 is connected with the industrial pool. The fire-fighting water pipe 1 and the secondary reuse water return pipe 2 are used for taking water from the primary industrial water pool, so that the use of cooling water is satisfied in water quality.
As a preferred embodiment of the present invention. The connecting end of the fire-fighting water pipe 1 and the communicating pipe 4 is provided with a self-supporting pressure stabilizing valve. In order to ensure that the water pressure of the cooling water supplied by the fire-fighting water pipe 1 meets the design requirement of the turbine lubricating oil cooling water pipe. The water pressure in the fire-fighting water pipe 1 is 1-1.2MPa, which exceeds the pressure-resistant limit of the cooling water pipe, so that a self-supporting pressure-stabilizing valve is arranged to reduce the water pressure of the fire-fighting water pipe 1 supplied into the communicating pipe 4. The water supply of the fire-fighting water pipe 1 is supplied by the diesel fire-fighting water pump, and the cooling water can still be used when the station service electricity is completely stopped, so that the safety of the turbine body is ensured.
As a preferred embodiment of the present invention. The internal water pressure of the reuse water return pipe 2 and the industrial water pipe 3 is smaller than the water pressure of the open type water inlet pipe 5 during operation. Because the reuse water return pipe 2 and the industrial water pipe 3 are directly connected with the communicating pipe 4, the water pressure of the cooling water in the reuse water return pipe 2 and the industrial water pipe 3 is preliminarily set, so that the direct connection mode can still meet the pressure-resistant requirement of the cooling water pipes in the communicating pipe 4, the first large-machine oil cooler 6 and the second large-machine oil cooler 7.
An operation method for a circulating water energy-saving system without a connecting main pipe comprises the following steps:
step one: after the steam turbine corresponding to the first large-machine oil cooler 6 is stopped, maintaining the operation of a circulating water pump of the steam turbine corresponding to the second large-machine oil cooler 7, and supplying circulating water by the circulating water pump through the open type water inlet pipe 5 and supplying circulating water to the first large-machine oil cooler 6 through the communicating pipe 4;
step two: after the two turbines are stopped, the corresponding circulating water pumps are closed, water is supplied to the communicating pipe 4 through the multiplexing water return pipe 2 and the industrial water pipe 3, the communicating pipe 4 supplies water to the two first large-machine oil coolers 6 and the second large-machine oil cooler 7, and the multiplexing water return pipe 2 supplies water through the circulating water systems of other turbines which normally operate;
step three: after the power failure of the whole factory, the communicating pipe 4 is supplied with water through the fire-fighting water pipe 1, and the fire-fighting water pipe 1 supplies energy through the diesel fire-fighting water pump.
Claims (5)
1. A circulating water economizer system for no contact main pipe, its characterized in that: including first big machine oil cooler (6) and second big machine oil cooler (7) that arrange in pairs, the both ends of first big machine oil cooler (6) and second big machine oil cooler (7) are connected with open inlet tube (5) and open outlet pipe (8) respectively, are connected with circulating water pump on open inlet tube (5), and open inlet tube (5) all connect in parallel on the play water end of communicating pipe (4), and the water inlet end of communicating pipe (4) connects in parallel has multiplexing water return pipe (2) and industrial water pipe (3), and water purification station is all connected to open inlet tube (5) and industrial water pipe (3), multiplexing water return pipe connection industrial pond.
2. A circulating water energy saving system for a non-contact parent pipe as claimed in claim 1, wherein: the water inlet end of the communicating pipe (4) is also connected with a fire-fighting water pipe (1) in parallel, and the fire-fighting water pipe (1) is connected with the industrial water tank.
3. A circulating water energy saving system for a non-contact parent pipe as claimed in claim 2, wherein: the connecting end of the fire-fighting water pipe (1) and the communicating pipe (4) is provided with a self-supporting pressure stabilizing valve.
4. A circulating water energy saving system for a non-contact parent pipe as claimed in claim 1, wherein: the internal water pressure of the reuse water return pipe (2) and the industrial water pipe (3) is smaller than the water pressure of the open type water inlet pipe (5) during operation.
5. A method of operating a circulating water energy saving system for a non-contact parent pipe according to any one of claims 1-4, comprising the steps of: step one: after the steam turbine corresponding to the first large-machine oil cooler (6) is stopped, maintaining the operation of a circulating water pump of the steam turbine corresponding to the second large-machine oil cooler (7), supplying water for the circulating water by the circulating water pump through an open water inlet pipe (5), and supplying water for the circulating water by the first large-machine oil cooler (6) through a communicating pipe (4); step two: after the two turbines are stopped, the corresponding circulating water pumps are closed, the communicating pipe (4) is supplied with water through the reuse water return pipe (2) and the industrial water pipe (3), the communicating pipe (4) supplies water for the two first large-machine oil coolers (6) and the second large-machine oil cooler (7), and the reuse water return pipe (2) supplies water through the circulating water systems of other turbines which normally operate; step three: after the power failure of the whole factory, the communicating pipe (4) is supplied with water through the fire-fighting water pipe (1), and the fire-fighting water pipe (1) supplies energy through the diesel fire-fighting water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740643.9A CN117005917A (en) | 2023-06-20 | 2023-06-20 | Circulating water energy-saving system for non-contact main pipe and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740643.9A CN117005917A (en) | 2023-06-20 | 2023-06-20 | Circulating water energy-saving system for non-contact main pipe and operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117005917A true CN117005917A (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310740643.9A Pending CN117005917A (en) | 2023-06-20 | 2023-06-20 | Circulating water energy-saving system for non-contact main pipe and operation method |
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| CN (1) | CN117005917A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117440671A (en) * | 2023-12-21 | 2024-01-23 | 福建省江南冷却科技有限公司 | Cooling system of intelligent mining equipment unit and control method thereof |
-
2023
- 2023-06-20 CN CN202310740643.9A patent/CN117005917A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117440671A (en) * | 2023-12-21 | 2024-01-23 | 福建省江南冷却科技有限公司 | Cooling system of intelligent mining equipment unit and control method thereof |
| CN117440671B (en) * | 2023-12-21 | 2024-03-08 | 福建省江南冷却科技有限公司 | Control method of cooling system of intelligent mining equipment unit |
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