CN212406830U - Thermodynamic system for transforming back pressure unit into extraction condensing unit - Google Patents
Thermodynamic system for transforming back pressure unit into extraction condensing unit Download PDFInfo
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- CN212406830U CN212406830U CN202021468977.3U CN202021468977U CN212406830U CN 212406830 U CN212406830 U CN 212406830U CN 202021468977 U CN202021468977 U CN 202021468977U CN 212406830 U CN212406830 U CN 212406830U
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- 238000000605 extraction Methods 0.000 title claims description 39
- 230000001131 transforming effect Effects 0.000 title description 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 230000001172 regenerating effect Effects 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims 3
- 230000005494 condensation Effects 0.000 claims 3
- 238000011084 recovery Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000011033 desalting Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000008236 heating water Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
本实用新型公开了一种背压机组改造为抽凝机组的热力系统，本实用新型通过原始背压供热汽轮机排汽进行利用，新增排汽利用低压凝汽汽轮机，将现有的背压机组改造成为了抽凝机组。当供热需求量较小时，依然可保持原始背压供热汽轮机以设计流量进汽，通过增开背压供热汽轮机的排汽到低压凝汽汽轮机进汽的管道上的流量调整阀开度，控制工业用户供汽母管流量满足用户需求值，将富余的背压机组的排汽溢流至低压凝汽汽轮机进行发电。当供热需求量较高时，可提升锅炉蒸发量，同时通过减少背压供热汽轮机的排汽到低压凝汽汽轮机进汽的管道上的流量调整阀开度，将低压凝汽汽轮机进汽减小，以满足工业用户供汽母管流量满足用户需求值。
The utility model discloses a thermal system in which a back pressure unit is transformed into a condensing unit. The utility model utilizes the exhaust steam of the original back pressure heating steam turbine, and the newly added exhaust steam utilizes a low pressure condensing steam turbine, and the existing back pressure steam turbine is used for utilization. The compressor unit was transformed into a condensing unit. When the demand for heat supply is small, the original back pressure heating steam turbine can still be maintained to enter the steam with the designed flow rate, and the opening of the flow control valve on the pipeline from the exhaust steam of the back pressure heating steam turbine to the inlet steam of the low pressure condensing steam turbine can be increased by increasing the opening degree. , control the flow of the steam supply main pipe of industrial users to meet the user's demand value, and overflow the exhaust steam of the surplus back pressure unit to the low-pressure condensing steam turbine for power generation. When the heating demand is high, the boiler evaporation can be increased. At the same time, by reducing the opening of the flow adjustment valve on the pipeline from the exhaust steam of the back pressure heating steam turbine to the steam inlet of the low pressure condensing steam turbine, the low pressure condensing steam turbine is fed into the steam. Decrease to meet the demand value of the industrial user's steam supply main pipe flow.
Description
Technical Field
The utility model belongs to steam turbine power generation field, concretely relates to backpressure unit reforms transform for taking out thermodynamic system of condensing unit.
Background
In order to meet the heat supply requirements of industrial users, a certain number of small back pressure heat supply units with a certain scale are put into production in industrial parks of various regions in China. The method is limited by the influence of various internal and external factors such as inadequate preferential policies such as small utilization time of local government heat supply units, failure to achieve planning expectation or slow construction progress in enterprises, and the like, and the phenomena that the long-term planning and actual deviation of the existing work area heat supply is large and the heat load is seriously inferior to the expectation are often caused. This will result in the back pressure heating unit not reaching the design capacity after being put into operation, and the heating capacity is not matched with the heat demand of the regional heat user. After the heating period is finished, the heat supply demand is reduced sharply, the backpressure heat supply unit cannot meet the technical requirement of the lowest heat supply flow under the restriction of steam turbine exhaust blowing factors, the backpressure heat supply unit can only be in a shutdown state, a small amount of industrial steam is directly supplied to a heat user through temperature reduction and pressure reduction of a boiler, and high-quality heat loss can be caused. On the other hand, the shutdown of the steam turbine unit causes a large gap in service power, which results in that a large amount of expensive external network electric quantity needs to be purchased in a monthly heat power plant, and the profitability of the heat power plant is seriously affected. Therefore, the system optimization transformation is carried out on the existing small-sized back pressure heat supply unit, the problem of electricity consumption and supply in unit operation plants when the heat supply load is insufficient is solved, and the system has great significance for improving the annual operation economy of the cogeneration unit.
Disclosure of Invention
An object of the utility model is to overcome the aforesaid not enough, provide a thermodynamic system of backpressure unit transformation for taking out congealing the unit, can effectively solve the heat supply load when lower, the problem of the power consumption supply of mill.
In order to achieve the purpose, the utility model discloses a backpressure heat supply steam turbine and low pressure steam turbine, backpressure heat supply steam turbine connect the boiler, the female union coupling low pressure steam turbine that supplies of backpressure heat supply steam turbine is provided with flow control valve on the female pipe of supplying of low pressure steam turbine, and backpressure heat supply steam turbine connects the first order generator, and low pressure steam turbine connects the second order generator.
The pressure heat supply steam turbine is provided with medium-pressure steam extraction, and the medium-pressure steam extraction pressure is adjusted through a seat cylinder valve.
The back pressure heat supply steam turbine is provided with a first-stage regenerative steam extraction port, the first-stage regenerative steam extraction port is connected with the highest-stage high-pressure heater and used for heating water supply, drain water of the highest-stage high-pressure heater enters a secondary high-pressure heater, steam exhaust of the back pressure heat supply steam turbine is connected with a secondary high-pressure heater and a deaerator steam extraction port entering the deaerator through a second-stage regenerative steam extraction port, the second-stage regenerative steam extraction port and the secondary high-pressure heater are used for heating water supply, and drain water of the secondary high-pressure heater enters the deaerator.
The low pressure condensing steam turbine is provided with a third level backheating steam extraction port, the third level backheating steam extraction is connected with the primary desalting condensate water heater and is used for heating the desalting condensate water, the drain of the primary desalting condensate water heater enters the condenser, the exhaust steam of the low pressure condensing steam turbine (13) enters the condenser to be cooled, and the primary desalting condensate water heater is connected with the exhaust steam of the back pressure heat supply steam turbine.
The utility model discloses an original backpressure heat supply steam turbine steam extraction utilizes, and newly-increased steam extraction utilizes the low pressure steam turbine that condenses, reforms existing backpressure unit for taking out and congeals the unit. Compared with the existing system, when the heat supply demand is small, the original back pressure heat supply turbine can still be kept to enter steam at the designed flow, the flow of the steam supply main pipe of an industrial user is controlled to meet the user demand value by increasing the opening of the flow adjusting valve on the pipeline for the steam entering of the low pressure condensing turbine through the exhaust of the back pressure heat supply turbine, and the surplus exhaust of the back pressure unit is overflowed to the low pressure condensing turbine to generate electricity. When the heat supply demand is higher, the evaporation capacity of the boiler can be improved, and meanwhile, the opening degree of a flow regulating valve on a pipeline from the exhaust of the back pressure heat supply turbine to the inlet of the low pressure condensing turbine is reduced, so that the flow of a steam supply main pipe of an industrial user is met, and the user demand value is met. The newly-added low-pressure condensing steam turbine can still run to generate power when the heat supply load is higher after the existing back pressure unit is transformed into the condensing unit, so that the problem of power consumption and supply in the unit running plant is effectively solved, and the annual running economy of the cogeneration unit can be greatly improved.
Drawings
FIG. 1 is a diagram of a thermodynamic system of a prior art back pressure heat supply turbine;
fig. 2 is a system diagram of the present invention.
The system comprises a boiler 1, a boiler 2, a back pressure heat supply turbine 3, a medium pressure steam extraction pipeline 4, a cylinder valve 5, a first-stage regenerative steam extraction port 6, a highest-stage high-pressure heater 7, a second-stage regenerative steam extraction port 8, a secondary high-pressure heater 9, a deaerator steam extraction port 10, a deaerator 11, a steam supply main pipe 12, a first-stage generator 13, a low pressure steam turbine 14, a flow regulating valve 15, a third-stage regenerative steam extraction 16, a desalting condensate water primary heater 17, a condenser 18, a second-stage generator 19, a water supply pump 20 and a condensate pump.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 2, the utility model discloses a backpressure heat supply steam turbine 2 and low pressure steam turbine 13, backpressure heat supply steam turbine 2 connect boiler 1, and low pressure steam turbine 13 is connected to the female pipe 11 of supplying of backpressure heat supply steam turbine 2, is provided with flow control valve 14 on the female pipe 11 of supplying of low pressure steam turbine 13, and backpressure heat supply steam turbine 2 connects first order generator 12, and second order generator 18 is connected to low pressure steam turbine 13. The pressure-heating steam turbine 2 is provided with a medium-pressure extraction 3, the pressure of which is regulated by a seat cylinder valve 4. The steam of the steam supply main pipe 11 supplies heat to the outside.
The back pressure heat supply steam turbine 2 is provided with a first-stage regenerative steam extraction port 5, the first-stage regenerative steam extraction port 5 is connected with a highest-stage high-pressure heater 6 and used for heating and supplying water, drain water of the highest-stage high-pressure heater 6 enters a secondary high-pressure heater 8, steam exhaust of the back pressure heat supply steam turbine 2 is connected with a deaerator steam extraction port 9 which is connected with the secondary high-pressure heater 8 and enters a deaerator 10 through a second-stage regenerative steam extraction port 7, the second-stage regenerative steam extraction port 7 and the secondary high-pressure heater 8 are used for heating and supplying water, and drain water of the secondary high-pressure heater 8 enters the deaerat.
The low-pressure condensing turbine 13 is provided with a third-stage regenerative steam extraction port 15, the third-stage regenerative steam extraction port 15 is connected with a primary desalted condensed water heater 16 and used for heating desalted condensed water, the drained water of the primary desalted condensed water heater 16 enters a condenser 17, the exhausted steam of the low-pressure condensing turbine 13 enters the condenser 17 for cooling, and the primary desalted condensed water heater 16 is connected with the exhausted steam of the backpressure heat supply turbine 2.
The utility model discloses in, even when the heat supply demand is less, can maintain 1 evaporation capacity of boiler higher, keep original backpressure heat supply steam turbine 2 with the design flow admission, through the 14 apertures of hydraulic flow control valve on the exhaust steam to the pipeline of low pressure condensing steam turbine admission of the back pressure heat supply steam turbine that increases, control supplies the female pipe 11 flows of vapour to satisfy the user demand value, overflows the exhaust steam of the abundant back pressure unit to low pressure condensing steam turbine 13 and generates electricity. In the working process, each regenerative heater in the thermodynamic system can be normally operated, the temperature of condensed water and feed water is improved, the Rankine cycle efficiency is improved, and the heat of working media is reduced
And (4) loss.
The utility model discloses effectively solved small-size backpressure unit in non-heating season because the lower unit that leads to of heat supply load is compelled to stop the fortune and the supply problem of the operation factory power consumption that produces, can greatly degree promote the combined heat and power generation unit and move economic nature throughout the year.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021468977.3U CN212406830U (en) | 2020-07-22 | 2020-07-22 | Thermodynamic system for transforming back pressure unit into extraction condensing unit |
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| CN202021468977.3U CN212406830U (en) | 2020-07-22 | 2020-07-22 | Thermodynamic system for transforming back pressure unit into extraction condensing unit |
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| CN212406830U true CN212406830U (en) | 2021-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706411A (en) * | 2020-07-22 | 2020-09-25 | 西安西热节能技术有限公司 | A thermal system and working method for retrofitting a back pressure unit into a condensing unit |
-
2020
- 2020-07-22 CN CN202021468977.3U patent/CN212406830U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706411A (en) * | 2020-07-22 | 2020-09-25 | 西安西热节能技术有限公司 | A thermal system and working method for retrofitting a back pressure unit into a condensing unit |
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