CN217950479U - Power plant cylinder cutting system capable of reducing steam consumption of cooling steam - Google Patents
Power plant cylinder cutting system capable of reducing steam consumption of cooling steam Download PDFInfo
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- CN217950479U CN217950479U CN202222217761.5U CN202222217761U CN217950479U CN 217950479 U CN217950479 U CN 217950479U CN 202222217761 U CN202222217761 U CN 202222217761U CN 217950479 U CN217950479 U CN 217950479U
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Abstract
The utility model discloses a reducible power plant that cools off vapour volume for steam cuts jar system, including boiler, high pressure jar, intermediate pressure jar and low pressure jar, the boiler respectively with high pressure jar and intermediate pressure jar pipe connection, be provided with intercommunication main road and intercommunication branch road between intermediate pressure jar and the low pressure jar, be provided with relief pressure valve and check valve on the intercommunication branch road, be provided with butterfly valve and governing valve on the intercommunication main road, governing valve and butterfly valve parallel connection, the intermediate pressure jar through the butterfly valve or the governing valve on the intercommunication main road with low pressure jar pipe connection, the intermediate pressure jar is through relief pressure valve and the check valve and low pressure jar pipe connection on the intercommunication branch road, when the jar is cut to the low pressure jar, does not reform transform well low pressure communicating pipe again and turn-off the butterfly valve, has not only satisfied user's steam quantity, moreover greatly reduced the transformation expense, reduced the use of steam volume, reached little investment, energy-conserving effect.
Description
Technical Field
The utility model belongs to thermal power factory heat supply network cuts jar transformation system, concretely relates to jar system is cut to power plant of reducible steam volume for cooling steam.
Background
In recent years, with the continuous deepening of the reform of the economic system of China, the economic strength of China is continuously enhanced, the living standard of people is higher and higher, and the heating heat load of residents is gradually increased. However, at present, small boilers are mainly adopted for urban heating. In order to improve the urban atmospheric environment quality, the state has come out of relevant policies one after another, and the limited-period adjustment and modification shutdown notice of the civil small boilers is reached, and most of the civil small boilers are in the adjustment and modification shutdown range.
The waste steam heat removal loss of a condenser of a thermal power plant is the largest energy loss in a thermodynamic system of the power plant, so that the effective utilization of the heat loss has very important significance. Utilize low pressure jar to cut jar technique, under the circumstances of guaranteeing hot user's demand, can also further reduce the power plant cold source loss, the increasing the thermal efficiency reduces the coal consumption, economic benefits and environmental protection benefit are showing, and when the jar was cut to the low pressure jar, need the well low pressure communicating pipe and turn off the butterfly valve and reform transform, the transformation expense is huge.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a cylinder cutting system of a power plant, which can reduce the steam consumption of cooling steam;
the specific scheme is as follows:
the utility model provides a reducible power plant that cooling steam used vapour volume cuts jar system, includes boiler, high pressure cylinder, intermediate pressure cylinder and low pressure cylinder, and wherein, the boiler respectively with high pressure cylinder and intermediate pressure cylinder pipe connection, be provided with intercommunication main road and intercommunication branch road between intermediate pressure cylinder and the low pressure cylinder, be provided with relief pressure valve and check valve on the intercommunication branch road, be provided with butterfly valve and governing valve on the intercommunication main road, governing valve and butterfly valve parallel connection, the intermediate pressure cylinder through the main road on the intercommunication butterfly valve or governing valve with low pressure cylinder pipe connection, the intermediate pressure cylinder is through the relief pressure valve and check valve and low pressure cylinder pipe connection on the intercommunication branch road.
The power plant cuts jar system and still includes high pressure feed water heater, low pressure feed water heater and oxygen-eliminating device, all be provided with at least two-stage extraction steam pipe way on high pressure jar, intermediate pressure jar and the low pressure jar, the high pressure jar passes through extraction steam pipe way and high pressure feed water heater pipe connection on the high pressure jar, the intermediate pressure jar passes through extraction steam pipe way on the intermediate pressure jar respectively with high pressure feed water heater, high pressure oxygen-eliminating device and low pressure feed water heater pipe connection, the low pressure jar is through extraction steam pipe way and low pressure feed water heater pipe connection on the low pressure jar, the low pressure feed water heater passes through high pressure oxygen-eliminating device and high pressure feed water heater pipe connection, high pressure feed water heater and boiler pipe connection.
And the pressure reducing valve and the check valve on the communication branch are connected with a final-stage steam extraction pipeline on the low-pressure cylinder.
Still including condenser, condensate pump and gland seal heater among the power plant cuts the jar system, last stage steam extraction pipeline on the low pressure jar with condenser pipe connection, the condenser passes through condensate pump and gland seal heater pipe connection, gland seal heater and low pressure feed water heater pipe connection.
The boiler is internally provided with a superheater and a reheater, the superheater is connected with a high-pressure cylinder pipeline, and the high-pressure cylinder is connected with a low-pressure cylinder pipeline through the reheater.
The utility model discloses a power plant that can reduce steam consumption for cooling steam cuts jar system, including boiler, high pressure jar, intermediate pressure jar and low pressure jar, be provided with intercommunication main road and intercommunication branch road between intermediate pressure jar and the low pressure jar, the intermediate pressure jar through intercommunication butterfly valve or governing valve on the main road with low pressure jar pipe connection, the intermediate pressure jar still through the relief pressure valve and the check valve on the intercommunication branch road with low pressure jar pipe connection, when the heat supply network transformation excision low pressure jar, the butterfly valve on the middle and low pressure intercommunication main road is in the shutoff state, partial exhaust steam of the intermediate pressure jar gets into the low pressure jar through communicating pipe bypass governing valve, is used for cooling the heat that the low pressure jar rotor produced; the other part of exhaust steam enters a low-pressure cylinder final stage steam extraction pipeline through a pressure reducing valve and a check valve on a communication branch, and is used for cooling heat generated by a low-pressure cylinder rotor final stage blade, so that enthalpy drop of the part of steam can be reduced, the steam consumption is correspondingly reduced, and the cooled steam enters a condenser;
when the low-pressure cylinder is cut, the medium and low-pressure communicating pipe and the cut-off butterfly valve are not reformed, so that the steam consumption of a user is met, the reforming cost is greatly reduced, the steam consumption is reduced, and the effects of less investment and energy conservation are achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementations of the present invention, and not all implementations, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
As shown in fig. 1, a power plant cylinder switching system capable of reducing steam consumption for cooling steam comprises a boiler 1, a high pressure cylinder 4, an intermediate pressure cylinder 5 and a low pressure cylinder 10, wherein the boiler 1 is respectively connected with the high pressure cylinder 4 and the intermediate pressure cylinder 5 through pipelines, a main communication pipeline 6 and a branch communication pipeline 7 are arranged between the intermediate pressure cylinder 5 and the low pressure cylinder 10, a pressure reducing valve 12 and a check valve 13 are arranged on the branch communication pipeline 7, a butterfly valve 9 and a regulating valve 8 are arranged on the main communication pipeline 6, the regulating valve 8 and the butterfly valve 9 are connected in parallel, the intermediate pressure cylinder is connected with the low pressure cylinder 10 through the butterfly valve 9 or the regulating valve 8 on the main communication pipeline 6, and the intermediate pressure cylinder 5 is connected with the low pressure cylinder 10 through the pressure reducing valve 12 and the check valve 13 on the branch communication pipeline 7.
The power plant cuts jar system and still includes high pressure feed water heater 19, low pressure feed water heater 16 and oxygen-eliminating device 18, all be provided with at least two-stage steam extraction pipeline 17 on high pressure cylinder 4, intermediate pressure cylinder 5 and the low pressure feed water cylinder 10, high pressure cylinder 4 is through steam extraction pipeline 17 and the 19 pipe connections of high pressure feed water heater on the high pressure cylinder 4, intermediate pressure cylinder 5 is through the steam extraction pipeline 17 on the intermediate pressure cylinder 5 respectively with high pressure feed water heater 19, high pressure oxygen-eliminating device 18 and the 16 pipe connections of low pressure feed water heater, low pressure feed water cylinder 10 is through the steam extraction pipeline 17 and the 16 pipe connections of low pressure feed water heater on the low pressure feed water cylinder 10, low pressure feed water heater 16 is through high pressure oxygen-eliminating device 18 and 19 pipe connections of high pressure feed water heater, high pressure feed water heater 19 and boiler 1 pipe connection.
The pressure reducing valve 12 and the check valve 13 on the communication branch 7 are connected with the final steam extraction pipe 17 on the low pressure cylinder 10.
Still including condenser 14, condensate pump 20 and gland seal heater 15 in the power plant cuts jar system, last stage steam extraction pipeline 17 on the low pressure jar 10 with condenser 14 pipe connection, condenser 14 passes through condensate pump 20 and 15 pipe connection of gland seal heater, gland seal heater 15 and 16 pipe connection of low pressure heater.
The boiler is characterized in that a superheater 2 and a reheater 3 are arranged in the boiler 1, the superheater 2 is connected with a high-pressure cylinder 4 through a pipeline, and the high-pressure cylinder 4 is connected with a low-pressure cylinder 10 through the reheater 3 through a pipeline. The reheater 3 is essentially a steam superheater that reheats the low-pressure steam that has performed work to a certain temperature, and the reheater 3 further increases the thermal efficiency of the power plant cycle and controls the steam temperature of the last stage blade of the steam turbine within an allowable range. The reheater 3 is a heater in the boiler 1 for heating the steam from the steam turbine to superheated steam. The role of the reheater 3 is two: firstly, the humidity of the water vapor is reduced, which is beneficial to protecting the blades of the steam turbine; and secondly, the relative internal efficiency and the absolute internal efficiency of the steam turbine can be improved.
A power plant cylinder cutting system capable of reducing steam consumption comprises the following specific working processes:
steam generated by the boiler 1 sequentially passes through the high-pressure cylinder 4 and the intermediate-pressure cylinder 5, the intermediate-pressure cylinder 5 and the low-pressure cylinder 10 are communicated with the butterfly valve 9 on the main path 6 to be in a closed state, at the moment, steam exhaust of the intermediate-pressure cylinder 5 is divided into three parts, and a part of heat supply network first-station heaters are used for heating heat supply network circulating water to meet heat supply requirements of heat users; one part of the steam is used as regenerative steam extraction, the regenerative steam extraction enters a high-pressure heater 19, a deaerator 18 and a low-pressure heater 16 through a steam extraction pipeline 17 on the intermediate pressure cylinder 5 respectively for heating condensed water, the other part of the steam enters a low-pressure cylinder through a bypass regulating valve 8 on a main communication pipeline 6, and further enters a low-pressure cylinder last-stage steam extraction pipeline through a communication branch 7 through a pressure reducing valve 12 and a check valve 13 to be directly used for cooling low-pressure cylinder last-stage blades, the cooling steam is discharged to a condenser 14, and condensed water is heated by the high-pressure cylinder and the intermediate pressure cylinder regenerative steam extraction pipeline 17 in sequence and then enters a boiler 1 economizer to complete circulation.
The butterfly valve 9 on the main communication path 6 between the intermediate pressure cylinder 5 and the low pressure cylinder 10 is closed, the low pressure cylinder 10 is in a cylinder cutting state at the moment, the bypass adjusting valve 8 is additionally arranged on the butterfly valve 9, when the butterfly valve 9 is closed, steam in the intermediate pressure cylinder 5 can enter the low pressure cylinder 11 through the adjusting valve 8, meanwhile, the steam in the intermediate pressure cylinder 5 can also enter a final stage steam extraction pipeline of the low pressure cylinder through the pressure reducing valve 12 and the check valve 13 on the communication branch 7, the steam enters the low pressure cylinder through the pressure reducing valve 12 and the check valve 13, the steam expands to push a final stage blade of the low pressure cylinder to do work, the steam consumption entering the low pressure cylinder is reduced, after the steam pushes the blade to do work, the steam enters the condenser 14 through the final stage steam extraction pipeline, when the steam is discharged to the condenser 14 through the blade, partial heat can be taken away, and the effect of cooling the final stage blade of the rotor of the low pressure cylinder is achieved.
The low pressure cylinder cutting cylinder is also called low pressure cylinder zero output or low pressure cylinder blast operation, which means that all exhaust steam of the medium pressure cylinder 5 is led out through a steam extraction pipeline, only a small amount of cooling steam is reserved to enter the low pressure cylinder 10 to take away heat generated by friction of rotor blades and internal working media, and therefore a motion mode that the low pressure cylinder does not do work is achieved.
When the low pressure cylinder is switched, the exhaust steam in the intermediate pressure cylinder 5 can enter the low pressure cylinder 10 simultaneously from two paths, wherein one path enters the low pressure cylinder through the bypass regulating valve 8 and is used for cooling the heat generated by the rotor of the low pressure cylinder, and the other path enters the final stage steam extraction pipeline of the low pressure cylinder through the pressure reducing valve 12 and the check valve 13 and is directly used for cooling the final stage blade of the low pressure cylinder, so that the enthalpy drop of the steam is reduced, the steam consumption is correspondingly reduced, and the effect of cooling the final stage blade of the rotor of the low pressure cylinder is achieved.
The utility model discloses a power plant that can reduce steam consumption for cooling steam cuts jar system, including boiler, high pressure jar, intermediate pressure jar and low pressure jar, be provided with intercommunication main road and intercommunication branch road between intermediate pressure jar and the low pressure jar, the intermediate pressure jar through intercommunication butterfly valve or governing valve on the main road with low pressure jar pipe connection, the intermediate pressure jar still through the relief pressure valve and the check valve on the intercommunication branch road with low pressure jar pipe connection, when the heat supply network transformation excision low pressure jar, the butterfly valve on the intermediate pressure intercommunication main road is in the shutoff state, partial exhaust steam of intermediate pressure jar gets into low pressure jar through communicating pipe bypass governing valve; the steam cooler is used for cooling heat generated by the low-pressure cylinder rotor, and the other part of exhaust steam enters a final stage steam extraction pipeline of the low-pressure cylinder through a pressure reducing valve and a check valve on a communication branch and is used for cooling heat generated by a final stage blade of the low-pressure cylinder rotor, so that enthalpy drop of the part of steam can be reduced, the steam consumption is correspondingly reduced, and the cooled steam enters the condenser;
when the low-pressure cylinder is cut, the medium and low-pressure communicating pipe and the cut-off butterfly valve are not reformed, so that the steam consumption of a user is met, the reforming cost is greatly reduced, the steam consumption is reduced, and the effects of less investment and energy conservation are achieved.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (5)
1. The utility model provides a reducible power plant that cooling steam used vapour volume cuts jar system which characterized in that: including boiler (1), high-pressure cylinder (4), intermediate pressure cylinder (5) and low pressure cylinder (10), wherein, boiler (1) respectively with high-pressure cylinder (4) and intermediate pressure cylinder (5) pipe connection, be provided with between intermediate pressure cylinder (5) and low pressure cylinder (10) intercommunication main road (6) and intercommunication branch road (7), be provided with relief pressure valve (12) and check valve (13) on intercommunication branch road (7), be provided with butterfly valve (9) and governing valve (8) on intercommunication main road (6), governing valve (8) and butterfly valve (9) parallel connection, the intermediate pressure cylinder through communicate butterfly valve (9) or governing valve (8) on main road (6) with low pressure cylinder (10) pipe connection, intermediate pressure cylinder (5) are through relief pressure valve (12) and check valve (13) and low pressure cylinder (10) pipe connection on intercommunication branch road (7).
2. The power plant cylinder cutting system capable of reducing the steam consumption of cooling steam according to claim 1, characterized in that: the power plant cylinder cutting system further comprises a high-pressure heater (19), a low-pressure heater (16) and a deaerator (18), at least two-stage steam extraction pipelines (17) are arranged on the high-pressure cylinder (4), the intermediate-pressure cylinder (5) and the low-pressure cylinder (10), the high-pressure cylinder (4) is connected with the high-pressure heater (19) through a steam extraction pipeline (17) on the high-pressure cylinder (4), the intermediate-pressure cylinder (5) is connected with the high-pressure heater (19), the high-pressure deaerator (18) and the low-pressure heater (16) through a steam extraction pipeline (17) on the intermediate-pressure cylinder (5), the low-pressure cylinder (10) is connected with the low-pressure heater (16) through a steam extraction pipeline (17) on the low-pressure cylinder (10), the low-pressure heater (16) is connected with the high-pressure heater (19) through the high-pressure deaerator (18), and the high-pressure heater (19) is connected with the boiler (1) through a pipeline.
3. The power plant cylinder cutting system capable of reducing the steam consumption of cooling steam according to claim 2, characterized in that: and a pressure reducing valve (12) and a check valve (13) on the communication branch (7) are connected with a final-stage steam extraction pipeline (17) on the low-pressure cylinder (10).
4. The power plant cylinder cutting system capable of reducing the steam consumption of cooling steam as set forth in claim 3, wherein: still including condenser (14), condensate pump (20) and gland seal heater (15) among the power plant cut jar system, last steam extraction pipeline (17) on low pressure jar (10) with condenser (14) pipe connection, condenser (14) are through condensate pump (20) and gland seal heater (15) pipe connection, gland seal heater (15) and low pressure heater (16) pipe connection.
5. The power plant cylinder cutting system capable of reducing the steam consumption of cooling steam according to claim 1, characterized in that: be provided with over heater (2) and re-heater (3) in boiler (1), over heater (2) and high-pressure cylinder (4) pipe connection, high-pressure cylinder (4) are through re-heater (3) and low pressure cylinder (10) pipe connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222217761.5U CN217950479U (en) | 2022-08-23 | 2022-08-23 | Power plant cylinder cutting system capable of reducing steam consumption of cooling steam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222217761.5U CN217950479U (en) | 2022-08-23 | 2022-08-23 | Power plant cylinder cutting system capable of reducing steam consumption of cooling steam |
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| CN217950479U true CN217950479U (en) | 2022-12-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906134A (en) * | 2023-09-13 | 2023-10-20 | 华能济南黄台发电有限公司 | Steam turbine low pressure cylinder based on zero output of low pressure cylinder |
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- 2022-08-23 CN CN202222217761.5U patent/CN217950479U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906134A (en) * | 2023-09-13 | 2023-10-20 | 华能济南黄台发电有限公司 | Steam turbine low pressure cylinder based on zero output of low pressure cylinder |
| CN116906134B (en) * | 2023-09-13 | 2023-12-08 | 华能济南黄台发电有限公司 | Steam turbine low pressure cylinder based on zero output of low pressure cylinder |
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