CN214464454U - Coupling peak regulation system based on main steam, medium exhaust and steam extraction cooling - Google Patents
Coupling peak regulation system based on main steam, medium exhaust and steam extraction cooling Download PDFInfo
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- CN214464454U CN214464454U CN202120567155.9U CN202120567155U CN214464454U CN 214464454 U CN214464454 U CN 214464454U CN 202120567155 U CN202120567155 U CN 202120567155U CN 214464454 U CN214464454 U CN 214464454U
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Abstract
The utility model discloses a coupling peak shaving system based on main vapour, well row and extraction cooling, this system includes high-pressure main valve, the intermediate pressure jar, the low pressure jar, condensate pump, intermediate pressure jar exhaust control, the isolation valves, main steam contact pipe control, the isolation valves, intermediate pressure jar exhaust contact pipe control, the isolation valves, low pressure feed water contact pipe control, the isolation valves, low pressure jar extraction contact pipe control, the isolation valves, high, intermediate pressure jar minimum cooling steam admission pipeline control, the isolation valves, low pressure jar minimum cooling steam pipeline control, the isolation valves, main steam contact pipe, intermediate pressure jar exhaust contact pipe, and low pressure jar minimum cooling steam pipeline etc.; the operation method realizes the flexible switching of two groups of conventional unit generator sets. The utility model discloses need not to carry out technological transformation to the boiler side, can promote the degree of depth peak shaving ability of unit, increase the flexibility of unit operation.
Description
Technical Field
The utility model belongs to the technical field of thermal power generation, concretely relates to coupling peak shaving system based on main vapour, well row and steam extraction cooling.
Background
At present, a unit system operation method is widely adopted in domestic large-capacity thermal power plants, namely, a boiler supplies steam for a steam turbine, and the steam turbine drives a generator to generate electricity, so that an independent power generation unit of the boiler, the steam turbine and the generator is formed. And the power generation units are basically not in transverse connection. The minimum electric load of the existing thermal power generating unit is generally limited to about 30-40% due to the limitation of the minimum stable combustion output of the auxiliary fuel which is not put into the coal-fired boiler, and the safe and continuous operation of the boiler is adversely affected if the minimum electric load is continuously reduced. Chinese patent publication CN109653810A discloses a thermodynamic system with two machines switching operation in one furnace, which is characterized in that a superheated steam and reheated steam bypass and a control valve are added, when one boiler fails, the other boiler is used to drive two steam turbines to generate electricity, at this time, the set has a certain peak shaving capability, but the system is complex in arrangement, low in operation flexibility, and poor in operability in actual operation of a power plant.
In recent years, with the continuous promotion of upgrading and transforming work of thermal power generating units, a thermodynamic system and an operation method capable of realizing coupling connection among high-capacity thermal power generating units are urgently needed to enhance the flexibility of the units adapting to electric load dispatching instructions and improve the deep peak regulation capability of the units.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a coupling peak shaving system based on main vapour, well row and extraction of steam refrigerated, it need not to carry out technical transformation to the boiler side, can promote the degree of depth peak shaving ability of unit, increases the flexibility of unit operation.
The utility model discloses a realize through following technical scheme:
the coupled peak shaving system based on main steam, intermediate exhaust and extraction cooling comprises a first conventional unit generator set and a second conventional unit generator set;
the system comprises a first high-pressure main valve, a second high-pressure main valve, a first high-pressure cylinder, a second high-pressure cylinder, a first intermediate pressure cylinder, a second intermediate pressure cylinder, a first low-pressure cylinder, a second low-pressure cylinder, a first condensate pump, a second condensate pump, a first intermediate pressure cylinder steam exhaust control, an isolation valve group, a second intermediate pressure cylinder steam exhaust control, an isolation valve group, a main steam connecting pipe control, an isolation valve group, an intermediate pressure cylinder steam exhaust connecting pipe control, an isolation valve group, a low-pressure water supply connecting pipe control, an isolation valve group, a low-pressure cylinder steam extraction connecting pipe control, an isolation valve group, a first high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group, a second high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group, a first low-pressure cylinder minimum cooling steam pipeline control, an isolation valve group, a main steam connecting pipe, the system comprises an intermediate pressure cylinder steam exhaust connecting pipe, a low pressure water supply connecting pipe, a low pressure cylinder steam extraction connecting pipe, a first low pressure cylinder steam extraction pipe, a second low pressure cylinder steam extraction pipe, a first high pressure cylinder minimum cooling steam inlet pipeline, a second high pressure cylinder minimum cooling steam inlet pipeline, a first low pressure cylinder minimum cooling steam pipeline and a second low pressure cylinder minimum cooling steam pipeline;
the intermediate pressure cylinder steam exhaust connecting pipe is connected between a steam exhaust outlet of a first intermediate pressure cylinder and a steam exhaust outlet of a second intermediate pressure cylinder of the two turbines, and an intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group is installed on the intermediate pressure cylinder steam exhaust connecting pipe;
the main steam connecting pipe is connected between the steam inlet of a first high-pressure main throttle valve and the steam inlet of a second high-pressure main throttle valve of the two turbines, and a main steam connecting pipe control and isolation valve group is installed on the main steam connecting pipe;
the first intermediate pressure cylinder steam exhaust control and isolation valve group is connected between a steam exhaust port of the first intermediate pressure cylinder and a steam inlet of the first low pressure cylinder, and the second intermediate pressure cylinder steam exhaust control and isolation valve group is connected between a steam exhaust port of the second intermediate pressure cylinder and a steam inlet of the second low pressure cylinder;
the low-pressure cylinder steam extraction connecting pipe is connected between a first low-pressure cylinder steam extraction pipe and a second low-pressure cylinder steam extraction pipe of the two turbines, and a low-pressure cylinder steam extraction connecting pipe control and isolation valve group is installed on the low-pressure cylinder steam extraction connecting pipe;
the first low-pressure cylinder minimum cooling steam pipeline is connected between the low-pressure cylinder steam extraction connecting pipe and a steam inlet of the first low-pressure cylinder, the second low-pressure cylinder minimum cooling steam pipeline is connected between the low-pressure cylinder steam extraction connecting pipe and a steam inlet of the second low-pressure cylinder, the first low-pressure cylinder minimum cooling steam pipeline is provided with a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group, and the second low-pressure cylinder minimum cooling steam pipeline is provided with a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group;
the minimum cooling steam inlet pipeline of the first high-pressure and medium-pressure cylinder is connected between the inlet and the outlet of the first high-pressure main throttle valve, the minimum cooling steam inlet pipeline of the second high-pressure and medium-pressure cylinder is connected between the inlet and the outlet of the second high-pressure main throttle valve, the minimum cooling steam inlet pipeline of the first high-pressure and medium-pressure cylinder is provided with a first minimum cooling steam inlet pipeline control and isolation valve group, and the minimum cooling steam inlet pipeline of the second high-pressure and medium-pressure cylinder is provided with a second minimum cooling steam inlet pipeline control and isolation valve group;
the low-pressure water supply connecting pipe is connected between an outlet of a first condensate pump and an outlet of a second condensate pump of the two turbines, and a low-pressure water supply connecting pipe control and isolation valve group is installed on the low-pressure water supply connecting pipe.
The utility model discloses further improvement lies in, first conventional unit system generating set and second conventional unit system generating set's generating capacity is the same, the capacity is equivalent, and equipment type and thermodynamic system design are unanimous.
The utility model discloses further improvement lies in, and the running state of first conventional unit system generating set and second conventional unit system generating set is that two boilers, two steam turbines all are in running state.
The utility model has the further improvement that the main steam of the first conventional unit generating set can enter the second high-pressure cylinder of the second conventional unit generating set through the main steam connecting pipe to do work;
the main steam of the second conventional unit-system generator set can enter the first high-pressure cylinder of the first conventional unit-system generator set through the main steam communication pipe to do work.
The utility model discloses a further improvement lies in, when the second high pressure main steam door of second conventional unit system generating set closed, the main steam of second conventional unit system generating set can get into second high pressure cylinder and second intermediate pressure cylinder via the minimum cooling steam admission pipeline of second high, intermediate pressure cylinder, guarantee the safe operation of second high pressure cylinder and second intermediate pressure cylinder;
when a first high-pressure main steam valve of the first conventional unit system generator set is closed, main steam of the first conventional unit system generator set can enter the first high-pressure cylinder and the first intermediate-pressure cylinder through the minimum cooling steam inlet pipelines of the first high-pressure cylinder and the first intermediate-pressure cylinder, and safe operation of the first high-pressure cylinder and the first intermediate-pressure cylinder is guaranteed.
The utility model has the further improvement that the first intermediate pressure cylinder exhaust steam of the first conventional unit-system generator set can enter the second low pressure cylinder of the second conventional unit-system generator set to do work through the intermediate pressure cylinder exhaust connecting pipe;
the second intermediate pressure cylinder exhaust steam of the second conventional unit-made generator set can enter the first low pressure cylinder of the first conventional unit-made generator set to do work through the intermediate pressure cylinder exhaust steam communication pipe.
The utility model has the further improvement that the condensed water at the outlet of the first condensed water pump of the first conventional unit generating set enters the low-pressure water supply system of the second conventional unit generating set through the low-pressure water supply connecting pipe to maintain the stable water level of the deaerator of the second conventional unit generating set;
and the condensed water at the outlet of the second condensed water pump of the second conventional unit generator set enters the low-pressure water supply system of the first conventional unit generator set through the low-pressure water supply connecting pipe so as to maintain the water level of the deaerator of the first conventional unit generator set to be stable.
The utility model has the further improvement that when the second intermediate pressure cylinder steam exhaust control and the isolation valve set of the second conventional unit-made generator set are closed, the low pressure cylinder steam extraction of the first conventional unit-made generator set can enter the second low pressure cylinder cooling low pressure cylinder through the first low pressure cylinder steam extraction pipe, the low pressure cylinder steam extraction connecting pipe and the second low pressure cylinder minimum cooling steam pipeline, so as to ensure the safe operation of the second low pressure cylinder;
when the first intermediate pressure cylinder steam exhaust control and the isolation valve group of the first conventional unit-made generator set are closed, the low-pressure cylinder steam extraction of the second conventional unit-made generator set can enter the first low-pressure cylinder to cool the low-pressure cylinder through the second low-pressure cylinder steam extraction pipe, the low-pressure cylinder steam extraction connecting pipe and the first low-pressure cylinder minimum cooling steam pipeline, and the safe operation of the first low-pressure cylinder is guaranteed.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model realizes the switching of the depth peak-shaving operation mode of any unit by additionally arranging a main steam connecting pipe, an intermediate pressure cylinder steam exhaust connecting pipe, a low pressure cylinder steam extraction connecting pipe, a low pressure water supply connecting pipe, a high pressure cylinder minimum cooling steam inlet pipeline, an intermediate pressure cylinder minimum cooling steam inlet pipeline and a low pressure cylinder minimum cooling steam pipeline; when one unit operates in deep peak regulation, the main steam inlet amount and the low-pressure cylinder steam inlet amount can be reduced to the minimum, at the moment, the unit maintains the minimum work capacity, and the deep peak regulation capacity of the unit is increased. Utilize the utility model discloses, under the degree of depth peak regulation operating mode, can carry the most main steam of a unit and low pressure jar steam admission volume to another unit, realized that a unit is littleer technique is exerted oneself. The flexibility of the unit adapting to the dispatching electric load instruction is enhanced, the deep peak regulation electricity price income of the power plant is increased, and the production and operation benefits of the power plant are improved.
Drawings
Fig. 1 is a schematic diagram of a thermodynamic system of a coupled peak shaving system based on main steam, intermediate discharge and extraction cooling according to an embodiment of the present invention.
Description of reference numerals:
1. a first intermediate pressure cylinder steam exhaust control and isolation valve group, 2, a second intermediate pressure cylinder steam exhaust control and isolation valve group; 3. a control and isolation valve group of the intermediate pressure cylinder exhaust connecting pipe; 4. the intermediate pressure cylinder exhausts the union pipe; 5. a low pressure feed water interconnecting pipe; 6. a low-pressure water supply connecting pipe control and isolation valve group; 7. a first intermediate pressure cylinder; 8. a first low pressure cylinder; 9. a second intermediate pressure cylinder; 10. a second low pressure cylinder; 11. a first condensate pump 12, a second condensate pump; 13. a first conventional unit-made generator set, 14, a second conventional unit-made generator set; 15. a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 and a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group; 16. a first low pressure cylinder minimum cooling steam line, 18, a second low pressure cylinder minimum cooling steam line; 19. a first low-pressure cylinder steam extraction pipe, 20 and a second low-pressure cylinder steam extraction pipe; 21. a low-pressure cylinder steam extraction connecting pipe control and isolation valve group; 22. a low-pressure cylinder steam extraction connecting pipe; 23. a main steam interconnecting pipe; 24. a main steam connecting pipe control and isolation valve group; 25. a first high pressure main valve; 26. the minimum cooling steam inlet pipeline of the first high pressure cylinder and the first medium pressure cylinder; 27. a first high pressure cylinder and a first intermediate pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group; 28. a second high pressure main valve; 29. the minimum cooling steam inlet pipeline of the second high and medium pressure cylinders; 30. a second high pressure cylinder and a second medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group; 31. a first high pressure cylinder; 32. and a second high pressure cylinder.
Detailed Description
The present invention will now be described in further detail with reference to specific embodiments thereof, which are illustrated and not limited by the accompanying drawings.
As shown in fig. 1, the present invention provides a coupled peak shaving system based on main steam, middle exhaust and extraction cooling, which comprises a first conventional unit-system generator set 13 and a second conventional unit-system generator set 14, wherein the two conventional unit-system generator sets have substantially the same capacity, equipment type and thermodynamic system.
The system specifically comprises a first high-pressure main valve 25, a second high-pressure main valve 28, a first high-pressure cylinder 31, a second high-pressure cylinder 32, a first intermediate-pressure cylinder 7, a second intermediate-pressure cylinder 9, a first low-pressure cylinder 8, a second low-pressure cylinder 10, a first condensate pump 11, a second condensate pump 12, a first intermediate-pressure cylinder steam exhaust control, an isolation valve group 1, a second intermediate-pressure cylinder steam exhaust control, an isolation valve group 2, a main steam connecting pipe control, an isolation valve group 24, an intermediate-pressure cylinder steam exhaust connecting pipe control, an isolation valve group 3, a low-pressure water supply connecting pipe control, an isolation valve group 6, a low-pressure cylinder steam exhaust connecting pipe control, an isolation valve group 21, a first high-pressure minimum cooling steam inlet pipeline control of the intermediate-pressure cylinder, an isolation valve group 27, a second high-pressure minimum cooling steam inlet pipeline control of the intermediate-pressure cylinder, an isolation valve group 30, a first low-pressure minimum cooling steam pipeline control, an isolation valve group 15, a second low-pressure cylinder minimum cooling steam pipeline control, An isolation valve group 17, a main steam connecting pipe 23, an intermediate pressure cylinder steam exhaust connecting pipe 4, a low pressure water supply connecting pipe 5, a first low pressure cylinder steam extraction pipe 19, a second low pressure cylinder steam extraction pipe 20, a low pressure cylinder steam extraction connecting pipe 22, a first high pressure cylinder minimum cooling steam inlet pipeline 26, a second high pressure cylinder minimum cooling steam inlet pipeline 29, a first low pressure cylinder minimum cooling steam pipeline 16 and a second low pressure cylinder minimum cooling steam pipeline 18;
the intermediate pressure cylinder steam exhaust connecting pipe 4 is connected between a steam exhaust outlet of a first intermediate pressure cylinder 7 and a steam exhaust outlet of a second intermediate pressure cylinder 9 of the two turbines, and the intermediate pressure cylinder steam exhaust connecting pipe 4 is provided with an intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3;
the main steam connecting pipe 23 is connected between a first high-pressure main valve 25 and a second high-pressure main valve 28 of the two turbines, and a main steam connecting pipe control and isolation valve group 24 is installed on the main steam connecting pipe 23;
the first intermediate pressure cylinder steam exhaust control and isolation valve group 1 is connected between a steam exhaust port of a first intermediate pressure cylinder 7 and a steam inlet of a first low pressure cylinder 8 of the two turbines, and the second intermediate pressure cylinder steam exhaust control and isolation valve group 2 is connected between a steam exhaust port of a second intermediate pressure cylinder 9 and a steam inlet of a second low pressure cylinder 10 of the two turbines;
the low-pressure cylinder steam extraction connecting pipe 22 is connected between a first low-pressure cylinder steam extraction pipe 19 and a second low-pressure cylinder steam extraction pipe 20 of the two turbines, and a low-pressure cylinder steam extraction connecting pipe control and isolation valve group 21 is installed on the low-pressure cylinder steam extraction connecting pipe 22;
a first low-pressure cylinder minimum cooling steam pipeline 16 is connected between a low-pressure cylinder steam extraction connecting pipe 22 and a steam inlet of a first low-pressure cylinder 8, a second low-pressure cylinder minimum cooling steam pipeline 18 is connected between the low-pressure cylinder steam extraction connecting pipe 22 and a steam inlet of a second low-pressure cylinder 10, a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 15 is installed on the first low-pressure cylinder minimum cooling steam pipeline 16, and a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 is installed on the second low-pressure cylinder minimum cooling steam pipeline 18;
a first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline 26 is connected between the inlet and the outlet of a first high-pressure main valve 25, a second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline 29 is connected between the inlet and the outlet of a second high-pressure main valve 28, a first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group 27 is installed on the first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline 26, and a second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group 30 is installed on the second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline 29;
the low-pressure water supply connecting pipe 5 is connected between the outlet of the first condensate pump 11 and the outlet of the second condensate pump 12 of the two turbines, and the low-pressure water supply connecting pipe 5 is provided with a low-pressure water supply connecting pipe control and isolation valve group 6.
Preferably, a main steam connecting pipe control and isolation valve group 24 is arranged on the main steam connecting pipe 23, so that the switching of the deep peak shaving operation mode of a single unit is realized;
preferably, the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3 is arranged on the intermediate pressure cylinder steam exhaust connecting pipe 4, so that the switching of the deep peak regulation operation mode of a single unit is realized;
preferably, a first intermediate pressure cylinder steam exhaust control and isolation valve group 1 is installed on an intermediate pressure cylinder steam exhaust pipe of the first conventional unit-made generator set 13, can control the steam inlet amount of the first low pressure cylinder 8, and is matched with the first high pressure main steam valve 25 to jointly adjust the output of the first conventional unit-made generator set 13;
preferably, a second intermediate pressure cylinder steam exhaust control and isolation valve group 2 is installed on an intermediate pressure cylinder steam exhaust pipe of the second conventional unit-made generator set 14, and the valve group can control the steam intake of the second low pressure cylinder 10 and is matched with the second high pressure main steam valve 28 to jointly adjust the output of the second conventional unit-made generator set 14;
preferably, the first high and intermediate pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group 27 is installed on the first high and intermediate pressure cylinder minimum cooling steam inlet pipeline 26 of the first conventional unit-system generator set 13, and the valve group can maintain the minimum steam inlet amount of the first high pressure cylinder 31, so as to ensure the safe operation of the first high pressure cylinder 31 and the first intermediate pressure cylinder 7;
preferably, the minimum cooling steam inlet pipeline control and isolation valve group 30 of the second high and intermediate pressure cylinder is installed on the minimum cooling steam inlet pipeline 29 of the second high and intermediate pressure cylinder of the second conventional unit-system generator set 14, and the valve group can maintain the minimum steam inlet quantity of the second high pressure cylinder 32 and ensure the safe operation of the second high pressure cylinder 32 and the second intermediate pressure cylinder 9;
preferably, the low-pressure cylinder steam extraction connecting pipe 22 is provided with a low-pressure cylinder steam extraction connecting pipe control and isolation valve group 21 for providing switching of minimum cooling steam of the first low-pressure cylinder 8 and the second low-pressure cylinder 10 in the deep peak shaving process;
preferably, a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 15 is installed on a first low-pressure cylinder minimum cooling steam pipeline 16 of the first conventional unit-system generator set 13, and the valve group can maintain the minimum steam inlet amount of the first low-pressure cylinder 8 and ensure the safe operation of the first low-pressure cylinder 8;
preferably, a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 is installed on a second low-pressure cylinder minimum cooling steam pipeline 18 of the second conventional unit-system generator set 14, and the valve group can maintain the minimum steam inlet quantity of the second low-pressure cylinder 10 and ensure the safe operation of the second low-pressure cylinder 10;
preferably, a low-pressure water supply connecting pipe control and isolation valve group 6 is arranged on the low-pressure water supply connecting pipe 5 and used for adjusting the low-pressure water supply flow of the two units in the deep peak shaving process and maintaining the stable water level of the deaerator.
The utility model provides an operation method of coupling peak shaving system based on main vapour, well row and extraction cooling, including following step:
step 1, a first conventional unit-made generator set 13 and a second conventional unit-made generator set 14 run normally, and a high-first high-pressure main throttle 25 and a second high-pressure main throttle 28 keep running normally; the main steam connecting pipe control and isolation valve group 24 of the main steam connecting pipe 23 is in a closed state; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3 of the intermediate pressure cylinder steam exhaust connecting pipe 4 is in a closed state; the low-pressure cylinder steam extraction connecting pipe control and isolation valve group 21 of the low-pressure cylinder steam extraction connecting pipe 22 is in a closed state; the low-pressure water supply connecting pipe control and isolation valve group 6 of the low-pressure water supply connecting pipe 5 is in a closed state; a first intermediate pressure cylinder steam exhaust control and isolation valve group 1 of a first conventional unit-system generator set 13 is in an open state; the first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group 27 of the first conventional unit system generator set 13 is in a closed state; the first low-pressure cylinder minimum cooling steam pipeline of the first conventional unit generator set 13 is controlled, and the isolation valve group 15 is in a closed state; the second intermediate pressure cylinder steam exhaust control and isolation valve group 2 of the second conventional unit-system generator set 14 is in an open state; the second high and medium pressure cylinder minimum cooling steam admission pipeline control and isolation valve group 30 of the second conventional unit system generator set 14 is in a closed state; the second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 of the second conventional unit generator set 14 is in a closed state;
step 3, the main steam connecting pipe control and isolation valve group 24 of the main steam connecting pipe 23 is kept open; the intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group 3 of the intermediate pressure cylinder steam exhaust connecting pipe 4 is kept open; the first high-pressure main throttle 25 of the first conventional unit generator set 13 is slowly opened; a first intermediate pressure cylinder steam exhaust control and isolation valve group 1 of a first conventional unit-system generator set 13 is slowly opened; the first high and medium pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group 27 of the first conventional unit system generator set 13 is closed slowly; the first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 15 of the first conventional unit system generator set 13 is slowly closed; the second high and medium pressure cylinder minimum cooling steam admission line control, isolation valve bank 30 of the second conventional unit system generator set 14 is opened; a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group 17 of the second conventional unit generator set 14 is opened; the second high pressure main throttle 28 of the second conventional unit-system generator set 14 is slowly closed; the second intermediate pressure cylinder steam exhaust control and the isolating valve group 2 of the second conventional unit-system generator set 14 are slowly closed; the low-pressure water supply control and isolation valve group 6 is kept open; maintaining the water level of the deaerator of the second conventional unit generator set 14 to be stable; and realizing the deep peak shaving operation of the second conventional unit generator set 14.
The above only is the concrete implementation of the preferred embodiment of the present invention, not therefore the limitation of the patent scope of the present invention, all the applications of the equivalent structure or equivalent flow transformation made by the contents of the specification and the drawings or the application to multiple units, or the direct or indirect application in other related technical fields, all the same principles are included in the patent protection scope of the present invention.
Claims (9)
1. The coupled peak shaving system based on main steam, intermediate discharge and extraction cooling is characterized by comprising a first conventional unit generator set (13) and a second conventional unit generator set (14);
the steam-exhaust system specifically comprises a first high-pressure main steam valve (25), a second high-pressure main steam valve (28), a first high-pressure cylinder (31), a second high-pressure cylinder (32), a first intermediate pressure cylinder (7), a second intermediate pressure cylinder (9), a first low-pressure cylinder (8), a second low-pressure cylinder (10), a first condensate pump (11), a second condensate pump (12), a first intermediate pressure cylinder steam-exhaust control, an isolation valve group (1), a second intermediate pressure cylinder steam-exhaust control, an isolation valve group (2), a main steam connecting pipe control, an isolation valve group (24), an intermediate pressure cylinder steam-exhaust connecting pipe control, an isolation valve group (3), a low-pressure water supply connecting pipe control, an isolation valve group (6), a low-pressure cylinder steam-exhaust connecting pipe control, an isolation valve group (21), a first high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve group (27), a second high-pressure cylinder minimum cooling steam inlet pipeline control, an isolation valve control, The steam-steam cooling system comprises an isolation valve group (30), a first low-pressure cylinder minimum cooling steam pipeline control, an isolation valve group (15), a second low-pressure cylinder minimum cooling steam pipeline control, an isolation valve group (17), a main steam connecting pipe (23), an intermediate pressure cylinder exhaust connecting pipe (4), a low-pressure water supply connecting pipe (5), a low-pressure cylinder steam extraction connecting pipe (22), a first low-pressure cylinder steam extraction pipe (19), a second low-pressure cylinder steam extraction pipe (20), a first high-pressure cylinder minimum cooling steam inlet pipeline (26), a second high-pressure cylinder minimum cooling steam inlet pipeline (29), a first low-pressure cylinder minimum cooling steam pipeline (16) and a second low-pressure cylinder minimum cooling steam pipeline (18);
the intermediate pressure cylinder steam exhaust connecting pipe (4) is connected between a steam exhaust outlet of a first intermediate pressure cylinder (7) and a steam exhaust outlet of a second intermediate pressure cylinder (9) of the two turbines, and the intermediate pressure cylinder steam exhaust connecting pipe (4) is provided with an intermediate pressure cylinder steam exhaust connecting pipe control and isolation valve group (3);
the main steam connecting pipe (23) is connected between the steam inlets of the first high-pressure main throttle valve (25) and the second high-pressure main throttle valve (28) of the two turbines, and a main steam connecting pipe control and isolation valve group (24) is installed on the main steam connecting pipe (23);
the first intermediate pressure cylinder steam exhaust control and isolation valve group (1) is connected between a steam exhaust port of the first intermediate pressure cylinder (7) and a steam inlet of the first low pressure cylinder (8), and the second intermediate pressure cylinder steam exhaust control and isolation valve group (2) is connected between a steam exhaust port of the second intermediate pressure cylinder (9) and a steam inlet of the second low pressure cylinder (10);
the low-pressure cylinder steam extraction connecting pipe (22) is connected between a first low-pressure cylinder steam extraction pipe (19) and a second low-pressure cylinder steam extraction pipe (20) of the two turbines, and a low-pressure cylinder steam extraction connecting pipe control and isolation valve group (21) is installed on the low-pressure cylinder steam extraction connecting pipe (22);
a first low-pressure cylinder minimum cooling steam pipeline (16) is connected between a low-pressure cylinder steam extraction connecting pipe (22) and a steam inlet of a first low-pressure cylinder (8), a second low-pressure cylinder minimum cooling steam pipeline (18) is connected between the low-pressure cylinder steam extraction connecting pipe (22) and a steam inlet of a second low-pressure cylinder (10), a first low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (15) is installed on the first low-pressure cylinder minimum cooling steam pipeline (16), and a second low-pressure cylinder minimum cooling steam pipeline control and isolation valve group (17) is installed on the second low-pressure cylinder minimum cooling steam pipeline (18);
a first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (26) is connected between the inlet and the outlet of a first high-pressure main steam valve (25), a second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (29) is connected between the inlet and the outlet of a second high-pressure main steam valve (28), a first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (27) is installed on the first high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (26), and a second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline control and isolation valve group (30) is installed on the second high-pressure and medium-pressure cylinder minimum cooling steam inlet pipeline (29);
the low-pressure water supply connecting pipe (5) is connected between the outlet of the first condensate pump (11) and the outlet of the second condensate pump (12) of the two turbines, and the low-pressure water supply connecting pipe control and isolation valve group (6) is installed on the low-pressure water supply connecting pipe (5).
2. The coupled peak shaving system based on main steam, intermediate discharge and extraction steam cooling as claimed in claim 1, characterized in that the first conventional unit generator set (13) and the second conventional unit generator set (14) have the same power generation capacity, equivalent capacity, and consistent equipment type and thermodynamic system design.
3. The main steam, intermediate discharge and extraction cooling-based coupled peak shaving system according to claim 1, characterized in that the first conventional unit generator set (13) and the second conventional unit generator set (14) are in operation with both boilers and both turbines in operation.
4. The main steam, medium exhaust and extraction cooling-based coupled peak shaving system according to claim 1, characterized in that the main steam of the first conventional unit generator set (13) can enter the second high-pressure cylinder (32) of the second conventional unit generator set (14) through the main steam communication pipe (23) to perform work.
5. The main steam, medium exhaust and extraction cooling-based coupled peak shaving system according to claim 1, characterized in that the main steam of the second conventional unit generator set (14) can enter the first high-pressure cylinder (31) of the first conventional unit generator set (13) through the main steam communication pipe (23) to do work.
6. The coupled peak shaving system based on main steam, intermediate discharge and extraction steam cooling as claimed in claim 1, characterized in that when the second high pressure main steam valve (28) of the second conventional unit generator set (14) is closed, the main steam of the second conventional unit generator set (14) can enter the second high pressure cylinder (32) and the second intermediate pressure cylinder (9) through the second high and intermediate pressure cylinder minimum cooling steam inlet pipeline (29), and the safe operation of the second high pressure cylinder (32) and the second intermediate pressure cylinder (9) is ensured.
7. The coupled peak shaving system based on main steam, intermediate discharge and extraction steam cooling as claimed in claim 1, characterized in that when the first high pressure main steam valve (25) of the first conventional unit generator set (13) is closed, the main steam of the first conventional unit generator set (13) can enter the first high pressure cylinder (31) and the first intermediate pressure cylinder (7) through the first high and intermediate pressure cylinder minimum cooling steam inlet pipeline (26), and the safe operation of the first high pressure cylinder (31) and the first intermediate pressure cylinder (7) is ensured.
8. The coupled peak shaving system based on main steam, intermediate steam exhaust and steam extraction cooling as claimed in claim 1, characterized in that the exhaust steam of a first intermediate pressure cylinder (7) of a first conventional unit generator set (13) can enter a second low pressure cylinder (10) of a second conventional unit generator set (14) through an intermediate pressure cylinder exhaust steam communication pipe (4) to do work;
the exhaust steam of a second intermediate pressure cylinder (9) of the second conventional unit-system generator set (14) can enter a first low pressure cylinder (8) of the first conventional unit-system generator set (13) through an intermediate pressure cylinder exhaust steam communication pipe (4) to do work.
9. The main steam, medium emission and extraction steam cooling-based coupled peak shaving system according to claim 1, characterized in that condensed water at the outlet of the first condensed water pump (11) of the first conventional unit generator set (13) enters the low-pressure water supply system of the second conventional unit generator set (14) through the low-pressure water supply communication pipe (5) to maintain the deaerator water level of the second conventional unit generator set (14) stable;
condensed water at the outlet of a second condensed water pump (12) of a second conventional unit generating set (14) enters a low-pressure water supply system of a first conventional unit generating set (13) through a low-pressure water supply communication pipe (5) so as to maintain the water level of a deaerator of the first conventional unit generating set (13) stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120567155.9U CN214464454U (en) | 2021-03-19 | 2021-03-19 | Coupling peak regulation system based on main steam, medium exhaust and steam extraction cooling |
Applications Claiming Priority (1)
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