CN107542506B - Cascade utilization system for extraction condensing back of steam turbine and application thereof - Google Patents
Cascade utilization system for extraction condensing back of steam turbine and application thereof Download PDFInfo
- Publication number
- CN107542506B CN107542506B CN201710728081.0A CN201710728081A CN107542506B CN 107542506 B CN107542506 B CN 107542506B CN 201710728081 A CN201710728081 A CN 201710728081A CN 107542506 B CN107542506 B CN 107542506B
- Authority
- CN
- China
- Prior art keywords
- valve
- steam
- heat exchanger
- twenty
- pipe
- 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.)
- Active
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 123
- 238000009833 condensation Methods 0.000 claims abstract description 15
- 230000005494 condensation Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 202
- 238000010438 heat treatment Methods 0.000 claims description 119
- 230000002209 hydrophobic effect Effects 0.000 claims description 57
- 238000001816 cooling Methods 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 230000004048 modification Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a turbine extraction and condensation back cascade utilization system and application thereof, and provides a turbine extraction and condensation back cascade utilization system which is reasonable in design, reliable in performance and beneficial to realizing cascade recycling of waste heat of unit exhaust steam and application thereof, and aims at solving the problems of large modification and large investment on a turbine body in the prior art.
Description
Technical Field
The invention belongs to the technical field of cogeneration, and particularly relates to a turbine extraction, condensation and back cascade utilization system and application thereof, which are particularly suitable for a thermal power plant for supplying heat.
Background
At present, the policy in China gradually pays attention to popularization of new energy sources, and reduces the proportion of thermal power generating units. For thermal power plants, the exhaust steam of the steam turbine is usually directly discharged through an air cooling or water cooling mode, which causes huge cold end loss. For example, the energy utilization rate of a 300MW subcritical pure condensing unit is about 38%, wherein the cold end loss is about 45%, the energy utilization rate of the unit is improved to 60% after steam extraction and heat supply are adopted, but 20% of condensed low-temperature waste heat is discharged, and the heat is difficult to directly utilize due to low grade. Meanwhile, as the power grid is used for absorbing new energy and power, the requirements on the thermal power flexibility of the coal motor unit are continuously enhanced, and the coal motor unit needs to realize ultralow-load operation to meet the peak regulation requirement of the power grid, so that the coal-fired thermoelectric unit is extremely challenged.
Currently, the main patented technologies involved in the art are as follows: the patent 201610251992.4 discloses an optical axis high back pressure heat supply turbine, which realizes that a low pressure cylinder of a unit is not put into operation, and greatly reduces the power generation load of the unit, but the technology needs rotor replacement during heat supply and non-heat supply, so that the investment is increased, and the unit needs to be started and stopped during the replacement, thereby influencing the power generation economic benefit; the patent 'turbine extraction condensing back system and the adjusting method thereof patent number 201710193938.3' can realize that the low-pressure cylinder does not put into operation without replacing a rotor, and the technology can realize low-load power generation of a unit with high benefit. However, for the thermoelectric unit, the design heating steam extraction pressure is basically more than 0.2MPa, and the required temperature of the heat supply network water at the initial end of heating is only about 80 ℃, so that great available energy loss exists during heat exchange between the two. Moreover, there is currently no effective means to recover it.
The two technologies have great technical limitations, wherein the technology of the patent 201610251992.4 has large investment and influences the effective utilization hours of the unit, so that the overall economic benefit of the unit is reduced, the exhaust temperature of the unit is higher, and the unit is directly used for heating and has certain functional power loss; the technology of patent 201710193938.3 overcomes the problems of high investment and reduced unit utilization time, but has larger loss of working capacity in the heat exchange process, and provides a reliable and economic technical solution for the problem.
Disclosure of Invention
Based on the above situation, the invention solves the problems of large modification and large investment on the turbine body in the prior art, and provides the turbine extraction condensing back cascade utilization system which has reasonable design and reliable performance and is beneficial to realizing cascade recycling of waste heat of unit exhaust steam and application thereof. The device comprises a turbine medium-pressure cylinder, a turbine low-pressure cylinder and a condenser; the exhaust steam of the middle pressure cylinder of the steam turbine is connected with the low pressure cylinder of the steam turbine through a communicating pipe of the middle pressure cylinder, and seventeen valves are arranged on the communicating pipe of the middle pressure cylinder; the heating steam extraction pipe is connected with the medium-low pressure cylinder communicating pipe and is provided with a sixteen-number valve;
the device also comprises a back press, a generator, a primary drainage heat exchanger, a steam exhaust heat exchanger, a steam extraction heat exchanger and a secondary drainage heat exchanger; the first steam extraction branch pipe is respectively connected with a heating steam extraction pipe and a steam inlet of the steam extraction heat exchanger, and a fifteenth valve is arranged on the first steam extraction branch pipe; the drainage outlet of the steam extraction heat exchanger is connected with the secondary drainage heat exchanger through a pipeline, and a twelve-number valve is arranged on the pipeline; the second steam extraction branch pipe is respectively connected with a heating steam extraction pipe and a steam inlet of the back press, and a fourteen valve is arranged on the second steam extraction branch pipe; the back press is connected with the generator; the steam exhaust port of the back press is respectively connected with the condenser and the steam exhaust pipe, and the pipeline is respectively provided with an eighteen valve and a first valve; the steam exhaust pipe is connected with a steam inlet of the steam exhaust heat exchanger; the heat supply network water return pipe is sequentially connected with the primary drainage heat exchanger, the steam exhaust heat exchanger, the secondary drainage heat exchanger and the steam extraction heat exchanger; the first-stage hydrophobic heat exchanger is provided with a first heat supply network water branch, and twenty-fourth valves, twenty-third valves and twenty-first valves are respectively arranged on a heat supply network water inlet and outlet of the first-stage hydrophobic heat exchanger and the first heat supply network water branch; the steam exhaust heat exchanger is provided with a second heat supply network water branch, and a third valve, a fifth valve and a second valve are respectively arranged on a heat supply network water inlet and outlet of the steam exhaust heat exchanger and the second heat supply network water branch; the second-stage hydrophobic heat exchanger is provided with a third heat supply network water branch, and a sixth valve, an eighth valve and a seventh valve are respectively arranged on a heat supply network water inlet and outlet of the second-stage hydrophobic heat exchanger and the third heat supply network water branch; the steam extraction heat exchanger is provided with a fourth heat supply network water branch, and a nine-valve, an eleven-valve and a ten-valve are respectively arranged on a heat supply network water inlet and outlet of the steam extraction heat exchanger and the fourth heat supply network water branch; the heat supply network water supply pipe is connected with a heat supply network water outlet of the steam extraction heat exchanger; the first-stage drainage heat exchanger is respectively connected with drainage outlets of the steam exhaust heat exchanger and the second-stage drainage heat exchanger through drainage pipelines, and a fourth valve and a thirteenth valve are respectively arranged on the drainage outlet pipelines;
the water heater also comprises a high-stage feed water heater, a present-stage feed water heater and a low-stage feed water heater; the boiler water supply pipe is connected with the low-stage water supply heater, the present-stage water supply heater and the high-stage water supply heater in sequence; the primary water drain pipe is connected with a low-stage feed water heater; the high-grade water drain pipe is connected with the present-grade feed water heater, and a twenty-number valve is arranged on the high-grade water drain pipe; the present stage of hydrophobic pipe is connected with the hydrophobic outlet of the first stage of hydrophobic heat exchanger through a hydrophobic pipeline, and twenty-five valves are arranged on the hydrophobic pipeline. The system can fully recycle the steam energy of heating and steam extraction, namely, the extracted medium-pressure steam firstly enters the back press to do work and generate electricity, the cooled and depressurized steam is used for heating, the heating and steam extraction after heat exchange can be used for primarily heating the heat supply network water, the step heating of the heat supply network water is realized, and the waste heat of the heat supply network drainage can be deeply recycled, so that the heat supply network drainage can be input into a lower-level feedwater heater, the steam consumption of an advanced heater of a regenerative system is reduced, and the work capability loss of the regenerative system is reduced.
Preferably, the valves from one valve to twenty-fourth valve have the functions of regulating and measuring the fluid flow in the pipeline.
Preferably, the steam turbine low-pressure cylinder cooling system further comprises a cooling steam pipe, wherein the cooling steam pipe is connected with the steam turbine low-pressure cylinder, and a twenty-six valve is arranged on the cooling steam pipe and has a cut-off function. Therefore, when the exhaust steam of the middle pressure cylinder of the steam turbine is fully used for heating, the low pressure cylinder of the steam turbine is cooled by cooling steam, so that heat generated by blast loss is taken away, and the safe operation of the low pressure cylinder of the steam turbine is ensured.
Preferably, the high-grade drainage pipe is connected with a drainage inlet of the primary drainage heat exchanger through a drainage pipeline, and twenty-two valves and nineteenth valves are respectively arranged on the drainage inlet and the drainage pipeline. Therefore, the heat supply by further recycling the drain waste heat in the heat recovery system can be realized, and the steam consumption of the heat supply is reduced.
Preferably, the drain outlet of the primary drain heat exchanger is connected with the primary drain pipe through a pipeline, and a twenty-fifth valve is arranged on the pipeline and has a cut-off function. The heat supply network drainage is input into a lower-level regenerative heater than that utilized by the conventional technology, so that the consumption of high-level steam is reduced, and the functional loss is reduced.
Preferably, the back press provided by the invention is a pure condensing unit, and the exhaust pressure is 30kPa-100kPa.
The invention also provides an adjusting method of the turbine extraction condensing back cascade utilization system, which comprises the following steps:
during the non-heating period, the outside world has no heating heat load demand, and at this time:
closing the sixteen-valve, twenty-six-valve and fully opening the seventeen-valve, wherein the turbine unit operates under the pure condensation condition.
During the heating period, there is the heating heat load demand in the external world, this moment:
if the twenty-first valve is closed, the opening of the sixteen-first valve and the seventeen-first valve is adjusted, and the steam turbine unit is operated under the working condition of steam extraction and heat supply;
if the seventeen valves are closed, the sixteenth valves and the twenty-sixth valves are fully opened, and the turbine unit is operated under the back pressure heat supply working condition; at the moment, cooling steam enters the low-pressure cylinder of the steam turbine through a cooling steam pipe, and the low-pressure cylinder of the steam turbine is cooled; at the moment, the rear cylinder water spray of the low-pressure cylinder of the steam turbine is put into operation; at the moment, the rear row blades of the middle pressure cylinder of the steam turbine need to be replaced so as to adapt to the pressure change of steam in the middle pressure cylinder of the steam turbine.
Preferably, the invention relates to a turbine extraction and condensation back cascade utilization system and an adjusting method thereof, which are characterized in that the operation method of a heating system is as follows:
at the initial stage or the final stage of heating, the heating heat load demand is smaller, and at this time:
the exhaust steam of the middle pressure cylinder of the steam turbine is partially or completely used as heating extraction steam to be conveyed to a heating system by a heating extraction steam pipe, and the heating quantity of the heating extraction steam is far greater than the heating heat load demand at the moment, and the heating system is regulated by the following modes:
closing a fifteenth valve, opening the fourteenth valve, and enabling all heating and steam extraction to enter a back pressure machine to do work at the moment to drive a generator to generate electricity so as to meet the power requirements of factories; opening a valve I, and enabling exhaust steam of the back press to enter the exhaust steam heat exchanger through a steam exhaust pipe; opening a valve IV and a valve twenty-two, closing a valve nineteenth, and enabling the drain water of the steam exhaust heat exchanger to enter a primary drain water heat exchanger; the twenty-fourth valve and the twenty-third valve are opened, the heat supply network water enters the first-stage hydrophobic heat exchanger from the heat supply network water return pipe to be heated by the first stage, and meanwhile, the opening degrees of the twenty-fourth valve and the twenty-third valve are adjusted, so that the flow rate of the heat supply network water entering the first-stage hydrophobic heater can be changed; closing the second valve, opening the third valve and the fifth valve, and enabling the heat supply network water to enter the steam exhaust heat exchanger to be heated by the second stage; closing the valve No. six, the valve No. eight, the valve No. nine, the valve No. eleven, the valve No. twelve and the valve No. thirteen, and opening the valve No. seven and the valve No. ten, wherein the second-stage heated heat supply network water is directly supplied to a user through a heat supply network water supply pipe; opening a twenty-fifth valve, and conveying the drain water in the primary drain heat exchanger to a low-stage feed water heater through a primary drain pipe after heat exchange;
at the moment, a nineteenth valve is opened, a twenty valve is closed, and the drain water of the high-grade feed water heater enters the first-grade drain heat exchanger from the high-grade drain pipe to heat the water of the heat supply network;
when the heating heat load demand gradually decreases:
closing a twenty-second valve and a twenty-fifth valve, opening a nineteenth valve and a twenty-first valve, and directly introducing drain water of the steam exhaust heat exchanger into the primary feed water heater through a high-grade drain pipe; closing twenty-third and twenty-fourth valves, and opening twenty-first valve, wherein the heat supply network water directly enters the steam exhaust heat exchanger through the first heat supply network water branch;
when the operation cannot be satisfied, the eighteen valves are continuously opened and adjusted, the valve I is adjusted, and the steam exhaust part of the back press enters the condenser, so that the steam exhaust amount entering the steam exhaust heat exchanger is reduced, and the heat supply amount and the heating heat load of the steam exhaust are balanced.
When heating alpine period, heating heat load demand is great, this moment:
the exhaust steam of the middle pressure cylinder of the steam turbine is all used as heating extraction steam and is conveyed to a heating system by a heating extraction steam pipe, so that the heat supply quantity and the heating heat load of the heating extraction steam are balanced, and the heating system can be regulated in the following way:
the opening of a fifteenth valve and a fourteenth valve are regulated, and heating steam extraction enters a back press and a steam extraction heat exchanger respectively;
at the moment, part of heating steam extraction enters a back pressure machine to do work to drive a generator to generate electricity, so as to meet the power requirements of factories; opening a valve I, allowing exhaust steam of the back press to enter a steam exhaust heat exchanger through a steam exhaust pipe, opening a valve IV and a valve twenty-two, and allowing drain water of the steam exhaust heat exchanger to enter a primary drain water heat exchanger;
at the moment, a nineteenth valve is opened, a twenty valve is closed, and the drain water of the high-grade feed water heater enters the first-grade drain heat exchanger through the high-grade drain pipe;
at this time, part of heating steam extraction enters a steam extraction heat exchanger; opening a twelve-valve, and enabling the drain water of the steam extraction heat exchanger to enter a secondary drain water heat exchanger; opening a thirteenth valve, and enabling the drain water after heat exchange in the steam extraction heat exchanger to enter a first-stage drain water heat exchanger;
at the moment, twenty-four valves and twenty-three valves are opened, and the heat supply network water enters the first-stage hydrophobic heat exchanger from the heat supply network water return pipe to be heated by the first stage, and meanwhile, the opening of the twenty-four valves and the twenty-three valves is adjusted, so that the water flow rate of the heat supply network entering the first-stage hydrophobic heat exchanger can be changed; closing the second valve, opening the third valve and the fifth valve, and enabling the heat supply network water to enter the steam exhaust heat exchanger to be heated by the second stage; the valve No. six and the valve No. eight are opened, and the heat supply network water enters the second-stage hydrophobic heat exchanger to be heated in three stages, and meanwhile, the opening degrees of the valve No. seven, the valve No. six and the valve No. eight are adjusted, so that the flow rate of the heat supply network water entering the second-stage hydrophobic heat exchanger can be changed; closing a valve No. ten, opening a valve No. nine and a valve No. eleven, enabling the heat supply network water to enter the steam extraction heat exchanger to be heated by four stages, and then supplying the heat supply network water to a user; and opening a twenty-fifth valve, and conveying the drain water in the primary drain water heat exchanger to a low-stage feed water heater through a primary drain water pipe after heat exchange.
Preferably, the cascade utilization system of the extraction condensing back of the steam turbine and the adjusting method thereof are characterized in that the heating mode of the heat supply network water is cascade heating, and the cascade heating is sequentially carried out in a primary drainage heat exchanger, a steam exhaust heat exchanger, a secondary drainage heat exchanger and a steam extraction heat exchanger, so that the temperature is raised step by step, and finally, the cascade heating is supplied to a user through a heat supply network water supply pipe.
Compared with the prior art, the invention has the following advantages and effects:
1. the turbine unit has the advantages that the design is reasonable, the structure is simple, the performance is reliable, the rotor or the blade of the turbine is not required to be replaced, and the unit can be switched and selected freely among a pure condensation working condition, a steam extraction working condition and a back pressure working condition reasonably according to actual operation working conditions.
2. The invention has very small investment and basically does not need to modify the turbine body.
3. Compared with the rated working condition of the steam extraction unit, the invention increases the heat supply by more than one time, and can better meet the requirement of rapid development of the central heat supply of the current town.
4. The invention heats the heat supply network water step by step based on the principle of 'temperature opposite port and step utilization', reduces irreversible loss caused by overlarge temperature difference between steam and the heat supply network water, and has larger practical application value.
Drawings
In order to more clearly illustrate the invention, the drawings that are used as needed in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are merely descriptions of embodiments of the invention, and it is possible for those skilled in the art to make simple modifications or name changes according to technical solutions or to adopt conventional means without inventive effort, and the object of the invention can also be achieved.
FIG. 1 is a schematic diagram of a turbine extraction, condensation and back cascade utilization system.
Figure 2 is a schematic diagram of the structure of a turbine unit in the system,
figure 3 is a schematic diagram of the heating system in the system,
fig. 4 is a schematic diagram of the feedwater regenerative system in this system.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not intended to limit the present invention thereto.
Example 1
As shown in fig. 1 to 4, the present embodiment includes a turbine group 003, a heating system 004, and a feedwater heat recovery system 006.
The turbine unit 003 is provided with a turbine intermediate pressure cylinder 31, a turbine low pressure cylinder 32 and a condenser 33; the exhaust steam of the turbine intermediate pressure cylinder 31 is connected with the turbine low pressure cylinder 32 through an intermediate pressure cylinder communicating pipe 34, and a seventeen valve 17 is arranged on the intermediate pressure cylinder communicating pipe 34; the heating steam extraction pipe 35 is connected with the medium-low pressure cylinder communicating pipe 34, and a sixteen-number valve 16 is arranged on the heating steam extraction pipe 35; the valves all have adjusting functions.
The turbine unit 003 further includes a cooling steam pipe 36, the cooling steam pipe 36 is connected to the low pressure cylinder 32 of the turbine, and a twenty-six valve 26 having a shut-off function is provided on the cooling steam pipe 36.
The heat supply system 004 is provided with a back press 41, a generator 42, a primary drainage heat exchanger 43, a steam exhaust heat exchanger 44, a steam extraction heat exchanger 45 and a secondary drainage heat exchanger 46; the first steam extraction branch pipe 47 is respectively connected with the heating steam extraction pipe 35 and the steam inlet of the steam extraction heat exchanger 45, and a fifteenth valve 15 is arranged on the first steam extraction branch pipe 47; the drain outlet of the steam extraction heat exchanger 45 is connected with the secondary drain heat exchanger 46 through a pipeline, and a twelve-valve 12 is arranged on the pipeline; the second steam extraction branch pipe 48 is respectively connected with the heating steam extraction pipe 35 and the steam inlet of the back pressure machine 41, and a fourteen-number valve 14 is arranged on the second steam extraction branch pipe 48; the back press 41 is connected with a generator 42; the steam exhaust port of the back press 41 is respectively connected with the condenser 33 and the steam exhaust pipe 49, and the pipeline is respectively provided with an eighteen valve 18 and a first valve 1; the exhaust pipe 49 is connected with a steam inlet of the exhaust heat exchanger 44; the heat supply network return pipe 55 is sequentially connected with the primary drainage heat exchanger 43, the steam exhaust heat exchanger 44, the secondary drainage heat exchanger 46 and the steam extraction heat exchanger 45; the primary hydrophobic heat exchanger 43 is provided with a first heat supply network water branch 57, and twenty-fourth valve 24, twenty-third valve 23 and twenty-first valve 21 are respectively arranged on the heat supply network water inlet and outlet of the primary hydrophobic heat exchanger 43 and the first heat supply network water branch 57; the steam exhaust heat exchanger 44 is provided with a second heat supply network water branch 50, and a third valve 3, a fifth valve 5 and a second valve 2 are respectively arranged on the heat supply network water inlet and outlet of the steam exhaust heat exchanger 44 and the second heat supply network water branch 50; the second-stage hydrophobic heat exchanger 46 is provided with a third heat supply network water branch 52, and a sixth valve 6, an eighth valve 8 and a seventh valve 7 are respectively arranged on the heat supply network water inlet and outlet of the second-stage hydrophobic heat exchanger 46 and the third heat supply network water branch 52; the steam extraction heat exchanger 45 is provided with a fourth heat supply network water branch 51, and a valve No. 9, a valve No. eleven 11 and a valve No. 10 are respectively arranged on a heat supply network water inlet and outlet of the steam extraction heat exchanger 45 and the fourth heat supply network water branch 51; the heat supply network water supply pipe 56 is connected with a heat supply network water outlet of the steam extraction heat exchanger 45; the primary drainage heat exchanger 43 is respectively connected with drainage outlets of the steam exhaust heat exchanger 44 and the secondary drainage heat exchanger 46 through drainage pipelines, and a fourth valve 4 and a thirteenth valve 13 are respectively arranged on the drainage outlet pipelines; the valves all have adjusting functions.
The heating system 004 further comprises a water drain inlet of the primary water drain heat exchanger 43 connected with the advanced water drain pipe 65 through a pipeline, and a twenty-two valve 22 and a nineteenth valve 19 are respectively arranged on the water drain inlet and the connecting pipeline, and the valves have an adjusting function.
The heating system 004 further comprises a drain outlet of the primary drain heat exchanger 43 connected to the primary drain pipe 66 by a pipeline, and a twenty-fifth valve 25 is provided on the pipeline, said valve having a shut-off function.
The feedwater heat recovery system 006 is provided with a high-stage feedwater heater 61, a present-stage feedwater heater 62, and a low-stage feedwater heater 63; the boiler feed water pipe 64 is connected to the low-stage feed water heater 63, the present-stage feed water heater 62, and the high-stage feed water heater 61 in this order; the present-stage water drain pipe 66 is connected with the low-stage feedwater heater 63; the high-level drain pipe 65 is connected with the present-level feed water heater 62, and the twenty-number valve 20 is arranged on the high-level drain pipe 65; the valve has an adjusting function.
The back press 41 is a pure condensing unit, and the exhaust pressure is 30kPa-100kPa.
In the non-heating period, the outside has no heating heat load demand, and at this time:
closing the sixteen-valve 16 and the eighteen-valve 18, fully opening the seventeen-valve 17, and operating the turbine unit under a pure condensation condition.
When for heating period, there is the heating heat load demand in the external world, this moment:
closing a twenty-first valve 26, adjusting the opening of the sixteen-first valve 16 and the seventeen-first valve 17, and switching the steam turbine unit to the steam extraction and heat supply working condition operation;
as the sixteen-number valve 16 is gradually opened and the seventeen-number valve 17 is gradually closed, the flow rate of the exhaust gas of the turbine intermediate pressure cylinder 31 entering the turbine low pressure cylinder 32 is gradually reduced, when the flow rate is reduced to the critical flow rate of the turbine low pressure cylinder 32, the seventeen-number valve 17 is directly closed at the moment, the sixteen-number valve 16 is fully opened, the turbine unit is switched to the back pressure heat supply working condition for operation, at the moment, the twenty-six-number valve 26 is opened, cooling steam enters the turbine low pressure cylinder 32 through the cooling steam pipe 36, and the turbine low pressure cylinder 32 is cooled; at this time, the rear cylinder water injection of the turbine low pressure cylinder 32 is put into operation; at this time, the rear blade 37 of the intermediate pressure cylinder 31 of the turbine needs to be replaced to adapt to the pressure change of the steam in the intermediate pressure cylinder 31 of the turbine.
The operation method of the heating system is as follows:
at the initial stage or the final stage of heating, the heating heat load demand is smaller, and at this time:
the exhaust steam of the middle pressure cylinder 31 of the steam turbine is partially or entirely used as heating steam extraction and is transmitted to a heating system by a heating steam extraction pipe 35, and the heating quantity of the heating steam extraction is far greater than the heating heat load demand at the moment, and the heating system is regulated by the following modes:
closing the fifteenth valve 15, opening the fourteenth valve 14, and enabling all heating and steam extraction to enter the back press 41 to do work at the moment to drive the generator 42 to generate power so as to meet the power requirements of factories; opening valve 1, and allowing the exhaust steam of the back press 41 to enter the exhaust steam heat exchanger 44 through the exhaust steam pipe 49; opening the valve No. 4 and the valve No. twenty-second valve 22, closing the valve No. nineteenth valve 19, and enabling the drain water of the steam exhaust heat exchanger 44 to enter the primary drain heat exchanger 43; the twenty-fourth valve 24 and the twenty-third valve 23 are opened, the heat supply network water enters the first-stage hydrophobic heat exchanger 43 from the heat supply network water return pipe 55 to be heated by the first stage, and meanwhile, the opening degrees of the twenty-first valve 21, the twenty-fourth valve 24 and the twenty-third valve 23 are adjusted, so that the heat supply network water flow entering the first-stage hydrophobic heat exchanger 43 can be changed; closing the second valve 2, opening the third valve 3 and the fifth valve 5, and enabling the heat supply network water to enter the steam exhaust heat exchanger 44 for secondary heating; closing the valve 6, the valve 8, the valve 9, the valve 11, the valve 12 and the valve 13, opening the valve 7 and the valve 10, and directly supplying the second-stage heated heat supply network water to a user through the heat supply network water supply pipe 56; the twenty-fifth valve 25 is opened, and the drain water in the primary drain heat exchanger 43 is conveyed to the low-stage feed water heater 63 through the primary drain pipe 66 after heat exchange;
at this time, the nineteenth valve 19 is opened, the twenty first valve 20 is closed, and the drain of the high-level feedwater heater 61 enters the first-level drain heat exchanger 43 from the high-level drain pipe 65 to heat the heat supply network water;
when the heating heat load demand gradually decreases:
preference selection: closing the twenty-second valve 22 and the twenty-fifth valve 25, opening the nineteenth valve 19 and the twenty-first valve 20, and directly introducing the drain water of the steam-exhaust heat exchanger 44 into the present-stage feedwater heater 62 through the high-stage drain pipe 65; closing the twenty-third valve 23 and the twenty-fourth valve 24, opening the twenty-first valve 21, and directly introducing the heat supply network water into the steam exhaust heat exchanger 44 through the first heat supply network water branch 57;
when the above operation cannot be satisfied, it is also possible to select: the eighteen valves 18 are opened and regulated, the valve 1 is regulated, and the steam exhaust part of the back pressure machine 41 enters the condenser 33, so that the steam exhaust amount entering the steam exhaust heat exchanger 44 is reduced, and the heat supply amount of the steam exhaust is balanced with the heating heat load.
When heating alpine period, heating heat load demand is great, this moment:
the exhaust steam of the middle pressure cylinder 31 of the steam turbine is all used as heating extraction steam to be transmitted to a heating system by a heating extraction steam pipe 35, and in order to realize the balance between the heat supply quantity and the heating heat load of the heating extraction steam, the heating extraction steam can be regulated by the following modes:
the opening of a fifteenth valve 15 and a fourteenth valve 14 are regulated, and heating steam extraction enters a back press 41 and a steam extraction heat exchanger 45 respectively;
at the moment, part of heating and steam extraction enters the back press 41 to do work to drive the generator 42 to generate power so as to meet the power requirements of factories; opening the valve 1, allowing exhaust steam of the back press 41 to enter the exhaust steam heat exchanger 44 through the exhaust steam pipe 49, opening the valve 4 and the valve 22, and allowing drain water of the exhaust steam heat exchanger 44 to enter the primary drain water heat exchanger 43;
at this time, the nineteenth valve 19 is opened, the twenty first valve 20 is closed, and the drain of the high-stage feedwater heater 61 enters the first-stage drain heat exchanger 43 through the high-stage drain pipe 65;
at this time, part of the heating extraction steam enters the extraction steam heat exchanger 45; opening the twelve-valve 12, and leading the drain water of the steam extraction heat exchanger 45 to enter the secondary drain heat exchanger 46; opening a thirteen valve 13, and enabling the drain water after heat exchange in the steam extraction heat exchanger 45 to enter the primary drain heat exchanger 43;
at this time, twenty-fourth valve 24 and twenty-third valve 23 are opened, and the heat supply network water enters the first-stage hydrophobic heat exchanger 43 from the heat supply network water return pipe 55 to be heated by the first stage, and meanwhile, the opening of twenty-first valve 21, twenty-fourth valve 24 and twenty-third valve 23 is adjusted, so that the flow rate of the heat supply network water entering the first-stage hydrophobic heat exchanger 43 can be changed; closing the second valve 2, opening the third valve 3 and the fifth valve 5, and enabling the heat supply network water to enter the steam exhaust heat exchanger 44 for secondary heating; the valve 6 and the valve 8 are opened, the heat supply network water enters the second-stage hydrophobic heat exchanger 46 to be heated in three stages, and meanwhile, the opening of the valve 7, the valve 6 and the valve 8 are adjusted, so that the flow rate of the heat supply network water entering the second-stage hydrophobic heat exchanger 46 can be changed; closing the valve 10, opening the valve 9 and the valve 11, enabling the heat supply network water to enter the steam extraction heat exchanger 45 again to be heated by the fourth stage, and then supplying the heat supply network water to a user through the heat supply network water supply pipe 56; the twenty-fifth valve 25 is opened, and the drain water in the primary drain heat exchanger 43 is transferred to the low-stage feedwater heater 63 through the primary drain pipe 66 after heat exchange.
In this embodiment, the heating mode of the heat supply network water in the heating system is cascade heating, and the heat supply network water is sequentially heated and warmed step by step in the primary hydrophobic heat exchanger 43, the steam exhaust heat exchanger 44, the secondary hydrophobic heat exchanger 46 and the steam extraction heat exchanger 45, and finally supplied to the user through the heat supply network water supply pipe 56.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present invention, and are intended to be within the scope of the present invention. Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited to the embodiments described above, but is capable of modification and variation without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a steam turbine takes out congeals back cascade utilization system which characterized in that:
the device comprises a turbine intermediate pressure cylinder (31), a turbine low pressure cylinder (32) and a condenser (33); the exhaust steam of the middle pressure cylinder (31) of the steam turbine is connected with the low pressure cylinder (32) of the steam turbine through a middle pressure cylinder communicating pipe (34), and seventeen valves (17) are arranged on the middle pressure cylinder communicating pipe (34); the heating steam extraction pipe (35) is connected with the medium-low pressure cylinder communicating pipe (34), and a sixteen-number valve (16) is arranged on the heating steam extraction pipe (35);
the device also comprises a back press (41), a generator (42), a primary hydrophobic heat exchanger (43), a steam exhaust heat exchanger (44), a steam extraction heat exchanger (45) and a secondary hydrophobic heat exchanger (46); the first steam extraction branch pipe (47) is respectively connected with a heating steam extraction pipe (35) and a steam inlet of the steam extraction heat exchanger (45), and a fifteen valve (15) is arranged on the first steam extraction branch pipe (47); the drain outlet of the steam extraction heat exchanger (45) is connected with the secondary drain heat exchanger (46) through a pipeline, and a twelve-number valve (12) is arranged on the pipeline; the second steam extraction branch pipe (48) is respectively connected with a heating steam extraction pipe (35) and a steam inlet of the back pressure machine (41), and a fourteen-number valve (14) is arranged on the second steam extraction branch pipe (48); the back press (41) is connected with the generator (42); the steam exhaust port of the back press (41) is respectively connected with the condenser (33) and the steam exhaust pipe (49), and eighteen valves (18) and a first valve (1) are respectively arranged on the pipelines; the steam exhaust pipe (49) is connected with a steam inlet of the steam exhaust heat exchanger (44); the heat supply network water return pipe (55) is sequentially connected with the primary drainage heat exchanger (43), the steam exhaust heat exchanger (44), the secondary drainage heat exchanger (46) and the steam extraction heat exchanger (45); the first-stage hydrophobic heat exchanger (43) is provided with a first heat supply network water branch (57), and twenty-fourth valves (24), twenty-third valves (23) and twenty-first valves (21) are respectively arranged on the heat supply network water inlet and outlet of the first-stage hydrophobic heat exchanger (43) and the first heat supply network water branch (57); the steam exhaust heat exchanger (44) is provided with a second heat supply network water branch (50), and a third valve (3), a fifth valve (5) and a second valve (2) are respectively arranged on the heat supply network water inlet and outlet of the steam exhaust heat exchanger (44) and the second heat supply network water branch (50); the second-stage hydrophobic heat exchanger (46) is provided with a third heat supply network water branch (52), and a sixth valve (6), an eighth valve (8) and a seventh valve (7) are respectively arranged on the heat supply network water inlet and outlet of the second-stage hydrophobic heat exchanger (46) and the third heat supply network water branch (52); the steam extraction heat exchanger (45) is provided with a fourth heat supply network water branch (51), and a nine-valve (9), an eleven-valve (11) and a ten-valve (10) are respectively arranged on the heat supply network water inlet and outlet of the steam extraction heat exchanger (45) and the fourth heat supply network water branch (51); the heat supply network water supply pipe (56) is connected with a heat supply network water outlet of the steam extraction heat exchanger (45); the primary hydrophobic heat exchanger (43) is respectively connected with hydrophobic outlets of the steam exhaust heat exchanger (44) and the secondary hydrophobic heat exchanger (46) through hydrophobic pipelines, and a fourth valve (4) and a thirteenth valve (13) are respectively arranged on the hydrophobic outlet pipelines;
the water heater also comprises a high-stage feed water heater (61), a current-stage feed water heater (62) and a low-stage feed water heater (63); the boiler water supply pipe (64) is sequentially connected with the low-stage water supply heater (63), the present-stage water supply heater (62) and the high-stage water supply heater (61); the present-stage water drain pipe (66) is connected with the low-stage feed water heater (63); the high-grade water drain pipe (65) is connected with the present-grade feed water heater (62), and a twenty-number valve (20) is arranged on the high-grade water drain pipe (65); the present stage of hydrophobic pipe (66) is connected with the hydrophobic outlet of the first stage of hydrophobic heat exchanger (43) through a hydrophobic pipeline, and twenty-fifth valve (25) is arranged on the hydrophobic pipeline;
the steam turbine low-pressure cylinder cooling system further comprises a cooling steam pipe (36), wherein the cooling steam pipe (36) is connected with the steam turbine low-pressure cylinder (32), and a twenty-six valve (26) is arranged on the cooling steam pipe (36) and has a cut-off function;
the back press (41) is a pure condensing unit, and the exhaust pressure is 30kPa-100kPa.
2. The turbine extraction and condensation back cascade utilization system as claimed in claim 1, wherein the valves from valve number one (1) to valve number twenty-four (24) have functions of regulating and measuring fluid flow in the pipeline.
3. A turbine extraction and condensation back cascade utilization system according to claim 1, characterized in that the advanced hydrophobic pipe (65) is connected with the hydrophobic inlet of the primary hydrophobic heat exchanger (43) through a hydrophobic pipeline, and a twenty-two valve (22) and a nineteenth valve (19) are respectively arranged on the hydrophobic inlet and the hydrophobic pipeline.
4. A turbine extraction and condensation back cascade utilization system according to claim 3, characterized in that the drain outlet of the primary drain heat exchanger (43) is connected to the primary drain pipe (66) by a pipeline, and that a twenty-fifth valve (25) is provided on the pipeline, said valve having a shut-off function.
5. The method for adjusting the turbine extraction and condensation back cascade utilization system is characterized in that the turbine extraction and condensation back cascade utilization system is the turbine extraction and condensation back cascade utilization system according to claim 4, and the adjusting method is as follows: during the non-heating period, the outside world has no heating heat load demand, and at this time:
closing a sixteen-valve (16) and a twenty-six-valve (26), fully opening a seventeen-valve (17), and operating the steam turbine set under a pure condensation condition;
during the heating period, there is the heating heat load demand in the external world, this moment:
closing a twenty-first valve (26), adjusting the opening of the sixteen-first valve (16) and the seventeen-first valve (17), and operating the steam turbine set under the working condition of steam extraction and heat supply;
or closing the seventeen valves (17), fully opening the sixteen valves (16) and the twenty-six valves (26), and operating the steam turbine set under the back pressure heat supply working condition; at this time, the cooling steam enters the low-pressure cylinder (32) of the steam turbine through a cooling steam pipe (36) to cool the low-pressure cylinder (32) of the steam turbine; at the moment, the rear cylinder water spray of the low-pressure cylinder (32) of the steam turbine is put into operation; the turbine intermediate pressure cylinder (31) further comprises a rear row of blades (37), and the rear row of blades (37) of the turbine intermediate pressure cylinder (31) needs to be replaced at the moment so as to adapt to the pressure change of steam in the turbine intermediate pressure cylinder (31).
6. The method for adjusting a cascade utilization system of a turbine extraction condenser according to claim 5, wherein the heating system is operated as follows:
at the initial stage or the final stage of heating, the heating heat load demand is smaller, and at this time:
the exhaust steam of the middle pressure cylinder (31) of the steam turbine is partially or completely used as heating steam extraction and is conveyed to a heating system by a heating steam extraction pipe (35), and the heating quantity of the heating steam extraction is far greater than the heating heat load demand at the moment, and the heating system is regulated by the following modes:
closing a fifteenth valve (15), opening a fourteenth valve (14), and enabling all heating and steam extraction to enter a back press (41) to do work at the moment so as to drive a generator (42) to generate power; opening a valve I (1), and enabling exhaust steam of the back pressure machine (41) to enter the exhaust steam heat exchanger (44) through a steam exhaust pipe (49); opening a fourth valve (4) and a twenty-second valve (22), closing a nineteenth valve (19), and enabling the drain water of the steam exhaust heat exchanger (44) to enter a first-stage drain water heat exchanger (43); the twenty-fourth valve (24) and the twenty-third valve (23) are opened, the heat supply network water enters the first-stage hydrophobic heat exchanger (43) from the heat supply network water return pipe (55) to be heated by the first stage, and meanwhile, the opening of the twenty-fourth valve (21), the twenty-fourth valve (24) and the twenty-third valve (23) is adjusted, so that the heat supply network water flow entering the first-stage hydrophobic heat exchanger (43) can be changed; closing the second valve (2), opening the third valve (3) and the fifth valve (5), and enabling the heat supply network water to enter the steam exhaust heat exchanger (44) again to be heated by the second stage; closing a valve No. 6, a valve No. 8, a valve No. 9, a valve No. eleven (11), a valve No. twelve (12) and a valve No. thirteen (13), and opening a valve No. 7 and a valve No. 10, wherein the second-stage heated heat supply network water is directly supplied to a user through a heat supply network water supply pipe (56); a twenty-fifth valve (25) is opened, and the drain water in the primary drain water heat exchanger (43) is conveyed to the low-stage feed water heater (63) through the primary drain water pipe (66) after heat exchange;
at the moment, a nineteenth valve (19) is opened, a twenty valve (20) is closed, and the drain water of the high-level feed water heater (61) enters the first-level drain heat exchanger (43) from the high-level drain pipe (65) to heat the heat supply network water;
when the heating heat load demand gradually decreases:
closing a twenty-second valve (22) and a twenty-fifth valve (25), opening a nineteenth valve (19) and a twenty-first valve (20), and directly introducing the drain water of the steam exhaust heat exchanger (44) into the present-stage feed water heater (62) through the high-stage drain pipe (65); closing a twenty-third valve (23) and a twenty-fourth valve (24), opening the twenty-first valve (21), and enabling the heat supply network water to directly enter the steam exhaust heat exchanger (44) through a first heat supply network water branch (57);
when the operation cannot be satisfied, the eighteen valves (18) are continuously opened and adjusted, the valve (1) is adjusted, and the steam exhaust part of the back pressure machine (41) enters the condenser (33), so that the steam exhaust amount entering the steam exhaust heat exchanger (44) is reduced, and the heat supply amount of the steam exhaust is balanced with the heating heat load.
7. The method for adjusting a cascade utilization system of a turbine extraction condenser of claim 5, wherein during a high and cold heating period, a heating heat load demand is high, and at this time:
the exhaust steam of the middle pressure cylinder (31) of the steam turbine is used as heating extraction steam to be conveyed to a heating system by a heating extraction steam pipe (35), and in order to realize the balance between the heat supply quantity and the heating heat load of the heating extraction steam, the heating extraction steam can be regulated by the following modes:
the opening of a fifteenth valve (15) and a fourteenth valve (14) are regulated, and heating steam extraction enters a back press (41) and a steam extraction heat exchanger (45) respectively;
at the moment, part of heating and steam extraction enters a back press (41) to do work so as to drive a generator (42) to generate power; opening a valve I (1), enabling exhaust steam of the back pressure machine (41) to enter a steam exhaust heat exchanger (44) through a steam exhaust pipe (49), opening a valve IV (4) and a valve twenty-second (22), and enabling drain water of the steam exhaust heat exchanger (44) to enter a primary drain water heat exchanger (43);
at the moment, a nineteenth valve (19) is opened, a twenty valve (20) is closed, and the drain water of the high-level feed water heater (61) enters the first-level drain water heat exchanger (43) through the high-level drain water pipe (65);
at this time, part of heating steam extraction enters a steam extraction heat exchanger (45); opening a twelve-valve (12), and leading the drain water of the steam extraction heat exchanger (45) to enter a secondary drain water heat exchanger (46); opening a thirteen valve (13), and enabling the drain water after heat exchange in the steam extraction heat exchanger (45) to enter a primary drain heat exchanger (43);
at the moment, twenty-four valves (24) and twenty-three valves (23) are opened, and heat supply network water enters the primary hydrophobic heat exchanger (43) from a heat supply network water return pipe (55) to be heated at one stage, and meanwhile, the opening of the twenty-four valves (21), the twenty-four valves (24) and the twenty-three valves (23) is adjusted, so that the heat supply network water flow entering the primary hydrophobic heat exchanger (43) can be changed; closing the second valve (2), opening the third valve (3) and the fifth valve (5), and enabling the heat supply network water to enter the steam exhaust heat exchanger (44) again to be heated by the second stage; the valve No. 6 and the valve No. 8 are opened, the heat supply network water enters the secondary hydrophobic heat exchanger (46) again to be heated by three stages, and meanwhile, the opening degrees of the valve No. 7, the valve No. 6 and the valve No. 8 are adjusted, so that the flow rate of the heat supply network water entering the secondary hydrophobic heat exchanger (46) can be changed; closing a valve number ten (10), opening a valve number nine (9) and a valve number eleven (11), enabling the heat supply network water to enter the steam extraction heat exchanger (45) again to be heated by four stages, and then supplying the heat supply network water to a user through a heat supply network water supply pipe (56); and opening a twenty-fifth valve (25), and conveying the water in the primary water drainage heat exchanger (43) to the low-stage feed water heater (63) through the primary water drainage pipe (66) after heat exchange.
8. The method for adjusting the cascade utilization system of the extraction condensing back of the steam turbine according to claim 6, wherein the heating mode of the heat supply network water is cascade heating, and the heat supply network water is sequentially heated step by step in the primary hydrophobic heat exchanger (43), the steam exhaust heat exchanger (44), the secondary hydrophobic heat exchanger (46) and the steam extraction heat exchanger (45) to rise temperature, and finally enters the heat supply network water supply pipe (56).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728081.0A CN107542506B (en) | 2017-08-23 | 2017-08-23 | Cascade utilization system for extraction condensing back of steam turbine and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728081.0A CN107542506B (en) | 2017-08-23 | 2017-08-23 | Cascade utilization system for extraction condensing back of steam turbine and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107542506A CN107542506A (en) | 2018-01-05 |
| CN107542506B true CN107542506B (en) | 2024-04-09 |
Family
ID=60957717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710728081.0A Active CN107542506B (en) | 2017-08-23 | 2017-08-23 | Cascade utilization system for extraction condensing back of steam turbine and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107542506B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506057B (en) * | 2018-03-01 | 2023-07-14 | 华电电力科学研究院有限公司 | Cogeneration system for cutting off steam inlet of low-pressure cylinder and adjusting method |
| CN110056403B (en) * | 2019-04-29 | 2021-07-20 | 东方电气集团东方汽轮机有限公司 | Extraction back pressure heating type steam turbine connected with exhaust steam recovery system |
| CN110821585A (en) * | 2019-11-27 | 2020-02-21 | 国电电力发展股份有限公司大连开发区热电厂 | Back-pressure heat supply technology-based condensation and extraction integrated system and application thereof |
| CN111005776B (en) * | 2019-12-16 | 2022-05-03 | 国电龙源节能技术有限公司 | Heat supply method and heat supply system based on low-pressure cylinder optical axis heat supply technology |
| CN111720183B (en) * | 2020-05-15 | 2022-11-29 | 华电电力科学研究院有限公司 | Optimized scheduling method for parallel heat supply operation of extraction condensing unit and high back pressure heat supply unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009105930A1 (en) * | 2008-02-28 | 2009-09-03 | 清华大学 | A kind of concentrated heat-supply system |
| CN107023337A (en) * | 2017-03-28 | 2017-08-08 | 华电电力科学研究院 | Steam turbine extraction condensing back pressure system and its adjusting method |
| CN107062351A (en) * | 2017-05-08 | 2017-08-18 | 华电电力科学研究院 | A kind of heat supply network progressive solution system and its adjusting method using small steam turbine |
| CN207332964U (en) * | 2017-08-23 | 2018-05-08 | 华电电力科学研究院 | A kind of steam turbine extraction condensing back pressure gradient utilization system |
-
2017
- 2017-08-23 CN CN201710728081.0A patent/CN107542506B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009105930A1 (en) * | 2008-02-28 | 2009-09-03 | 清华大学 | A kind of concentrated heat-supply system |
| CN107023337A (en) * | 2017-03-28 | 2017-08-08 | 华电电力科学研究院 | Steam turbine extraction condensing back pressure system and its adjusting method |
| CN107062351A (en) * | 2017-05-08 | 2017-08-18 | 华电电力科学研究院 | A kind of heat supply network progressive solution system and its adjusting method using small steam turbine |
| CN207332964U (en) * | 2017-08-23 | 2018-05-08 | 华电电力科学研究院 | A kind of steam turbine extraction condensing back pressure gradient utilization system |
Non-Patent Citations (1)
| Title |
|---|
| 商永强 ; .供热改造中能源梯级利用技术研究.华电技术.2017,(05),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107542506A (en) | 2018-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107542506B (en) | Cascade utilization system for extraction condensing back of steam turbine and application thereof | |
| CN108316980B (en) | Fused salt heat accumulation and release peak shaving system of thermal power generating unit | |
| CN112855293B (en) | Integrated heat storage industrial steam supply cogeneration peak shaving frequency modulation system and operation method | |
| CN108035777B (en) | Low-pressure cylinder combined zero-output heat supply system and method in thermal power generating unit | |
| CN108049923B (en) | Three-exhaust 200MW unit medium-low pressure cylinder combined zero-output heat supply system and method | |
| CN108343479B (en) | Two-unit-based back condensation and extraction heat supply system and adjusting method | |
| CN105003351A (en) | Multi-energy-form output energy tower for stepwise recycling gas engine waste heat energy | |
| CN109990362A (en) | A kind of indirect air cooling unit high back pressure heating system and adjusting method | |
| CN111365748B (en) | Heat supply method and heat supply system of cogeneration unit | |
| CN110332026B (en) | Steam extraction power generation heat supply system for coupling condensation back extraction heat supply and operation method | |
| CN108194156A (en) | A kind of zero output heating system of low pressure (LP) cylinder and method of no cooling steam bypass | |
| CN112050274A (en) | Cascade energy utilization heating system under low-load working condition and control method thereof | |
| CN109488396B (en) | Main pipe steam waste heat energy graded heating combined heat and power system device | |
| CN110700909A (en) | Heating season cogeneration unit on-line electricity load adjusting system and adjusting method | |
| CN207332964U (en) | A kind of steam turbine extraction condensing back pressure gradient utilization system | |
| CN216482441U (en) | Steam heat storage and release system | |
| CN113623032B (en) | Coal-fired boiler flue gas heat storage and power generation integrated system and operation method | |
| CN110230521B (en) | Cascade heating system for heat pump by cutting off steam inlet coupling of low-pressure cylinder of thermoelectric unit and adjusting method | |
| CN211119594U (en) | Double-backpressure series step heating system of air cooling unit | |
| CN111706898B (en) | Method for improving heat supply capacity of unit after high-back-pressure heat supply transformation | |
| CN210663026U (en) | Novel heating system | |
| CN212406830U (en) | Thermodynamic system for transforming back pressure unit into extraction condensing unit | |
| CN212362152U (en) | Cascade energy utilization heating system under low-load working condition | |
| CN210178431U (en) | System for cutting cylinder operation under partial load for steam turbine with multiple low-pressure cylinders | |
| CN114233421A (en) | Thermoelectric cooperative system integrated with steam ejector and operation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Hangzhou City, Zhejiang province 310030 Xihu District West Lake science and Technology Economic Zone Road No. 10 Applicant after: HUADIAN ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310030 Xihu District West Lake science and Technology Economic Zone Road No. 10 Applicant before: Huadian Electric Power Research Institute |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |