CN216950498U - Hot water waste heat utilization steam turbine flow control device based on flash evaporation technology - Google Patents
Hot water waste heat utilization steam turbine flow control device based on flash evaporation technology Download PDFInfo
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- CN216950498U CN216950498U CN202220421348.8U CN202220421348U CN216950498U CN 216950498 U CN216950498 U CN 216950498U CN 202220421348 U CN202220421348 U CN 202220421348U CN 216950498 U CN216950498 U CN 216950498U
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- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model provides a flow control device of a hot water waste heat utilization steam turbine based on a flash evaporation technology, which comprises a steam turbine, wherein a valveless steam inlet pipeline for introducing main flash evaporation steam is connected to a steam inlet end of the steam turbine, a steam outlet end of the steam turbine is connected with a steam exhaust pipeline for leading to a condenser, an adjusting mechanism for introducing air to adjust the pressure of the steam exhaust end of the steam turbine is further arranged on the steam exhaust end of the steam turbine, and a controller for controlling the adjusting mechanism is further arranged on one side of the steam turbine; the utility model has the advantages that air can be introduced to adjust the exhaust pressure of the steam turbine, so that the pressure difference between the steam inlet end and the exhaust end of the steam turbine is changed, and finally the steam inlet quantity of the steam turbine is controlled, thereby controlling the rotating speed and the power of the steam turbine.
Description
Technical Field
The utility model relates to the field of turbines, in particular to a flow control device of a hot water waste heat utilization turbine based on a flash evaporation technology.
Background
In the fields of petroleum and chemical industry, a large amount of industrial hot water can be generated in the process flows of cracking, fractionating, reforming, synthesizing and the like of petroleum, most of the hot water is below 100 ℃, if the hot water is directly cooled, not only the environment is polluted, but also the waste of heat energy is caused, if the heat energy in the hot water needs to be recovered, one of the feasible methods is to flash-vaporize the hot water, and then drive the turbine to convert the hot water into mechanical energy to drive various devices (such as a compressor, a generator, a feed pump, an induced draft fan, etc.), so as to complete the conversion, recovery and utilization of heat energy, and the condensing turbine driven by the flash steam, because the steam pressure of the inlet steam is lower than 1 atmosphere, the volume flow of the steam is large, and the available energy per se is low and cannot be lost, an unprecedented novel flow control device is needed to meet the flow control requirement of the condensing steam turbine.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a flow control device of a hot water waste heat utilization steam turbine based on a flash evaporation technology, which can control a back pressure regulating valve manually or automatically to introduce air to regulate the steam exhaust pressure of the steam turbine, so that the pressure difference between the steam inlet end and the steam exhaust end of the steam turbine is changed, and finally the steam inlet quantity of the steam turbine is controlled, thereby achieving the control of the rotating speed and the power of the steam turbine.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a hot water waste heat utilization steam turbine flow control device based on flash distillation technique, includes the steam turbine, the admission end of steam turbine is connected with the valveless admission pipeline that is used for letting in the main steam of flash distillation, the play steam end of steam turbine is connected with the exhaust line that is used for accesss to the condenser, the exhaust end of steam turbine still is equipped with the adjustment mechanism who is used for introducing the air in order to adjust steam turbine exhaust end pressure, steam turbine one side still including the controller that is used for controlling adjustment mechanism.
Furthermore, a pressure transmitter for detecting the transmission pressure of the flash evaporation main steam is arranged on the valveless steam inlet pipeline, and the pressure transmitter is electrically connected with the controller.
Furthermore, a rotating speed sensor for detecting the rotating speed of the steam turbine is arranged on the air inlet end of the steam turbine, and the rotating speed sensor is electrically connected with the controller.
Further, the adjusting mechanism is at least one group of back pressure adjusting valves.
The utility model has the beneficial effects that: the flash steam turbine does not adopt the conventional mode that the steam flow is controlled by a specially-arranged steam inlet at the steam inlet of the turbine, but adopts one or more than two back pressure regulating valves arranged at the steam exhaust end of the turbine, the negative pressure at the steam exhaust end of the turbine is utilized, air can be introduced to regulate the steam exhaust pressure of the turbine, so that the pressure difference between the steam inlet end and the steam exhaust end of the turbine is changed, the steam inlet flow of the turbine is controlled, the rotation speed and the power of the turbine are controlled, and meanwhile, the evaporation flow of the whole set of flash system can be effectively controlled to meet the requirement of a user on the temperature drop of hot water.
Drawings
FIG. 1 is a schematic view of the present invention;
reference numerals: 1. a steam turbine; 2. a valveless steam intake line; 3. an exhaust line; 4. a back pressure regulating valve; 5. A controller; 6. a pressure transmitter; 7. a rotation speed sensor.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Because the pressure of the flash steam is lower than 1 atmosphere, the volume flow of the steam is large, and the pressure difference between the steam inlet end and the steam outlet end of the steam turbine 1 is very small, the problem that the rotating speed and the power output of the steam turbine 1 cannot be changed by controlling the steam quantity by a specially-arranged steam inlet valve at the steam inlet of the steam turbine 1 conventionally is solved, and the conventional steam inlet valve can sufficiently cause the loss of a considerable part of the steam inlet pressure, so the utility model designs the flow control device of the hot water waste heat utilization steam turbine 1 based on the flash technology, the specific structure of which is shown in figure 1 comprises the steam turbine 1, a valveless steam inlet pipeline for introducing the flash main steam is connected to the steam inlet end of the steam turbine 1, and a steam outlet end of the steam turbine 1 is connected with a steam outlet pipeline 3 for introducing the flash main steam to a condenser (because the flash main steam introduced into the steam turbine 1 is high temperature, the discharged steam after the steam turbine 1 is driven to rotate and needs to be cooled, therefore, the steam enters the condenser through the steam exhaust connecting pipe, the condenser condenses high-temperature steam into condensed water through water-cooling heat exchange and discharges the condensed water, and the steam which is not condensed in the condenser is pumped out through the vacuum pumping equipment), the steam exhaust end of the steam turbine 1 is also provided with an adjusting mechanism for introducing air to adjust the pressure of the steam exhaust end of the steam turbine 1, the adjusting mechanism is at least one group of back pressure adjusting valves 4, one side of the steam turbine 1 also comprises a controller 5 for controlling the adjusting mechanism, wherein the back pressure adjusting valves 4 can be manually controlled and also can be automatically controlled through the controller 5, the back pressure adjusting valves 4 are arranged to utilize the negative pressure of the steam exhaust end of the steam turbine 1 to adjust the steam exhaust pressure of the steam turbine 1 by introducing air, so that the pressure difference between the steam intake end and the steam exhaust end of the steam turbine 1 is changed to control the steam intake of the steam turbine 1, thereby achieving the control of the rotating speed and the power of the steam turbine 1, meanwhile, the evaporation flow of the whole flash evaporation system can be effectively controlled to meet the requirement of a user on hot water temperature drop.
As shown in fig. 1, a pressure transmitter 6 for detecting the transmission pressure of the main flash steam is arranged on the valveless steam inlet pipeline 2, the pressure transmitter 6 is electrically connected with a controller 5, the back pressure regulating valve 4 is automatically regulated, a DCS system is arranged in the controller 5, when a power demand signal of the steam turbine 1 sent from the outside is received, the steam pressure value transmitted by the main flash steam in the valveless steam inlet pipeline 2 is received, the power of the steam turbine 1 at the moment is judged according to the steam pressure value, and is compared with the power demand signal sent from the outside, if the power demand signal does not reach or exceeds the standard, the controller 5 controls the opening degree of the back pressure regulating valve 4, so that the amount of introduced air is regulated to regulate the pressure difference between the air inlet end and the air outlet end of the steam turbine 1, and finally the steam inlet amount transmitted by the main flash steam is realized.
As shown in fig. 1, a rotation speed sensor 7 for detecting the rotation speed of the steam turbine 1 is arranged on the air inlet end of the steam turbine 1, the rotation speed sensor 7 is electrically connected with a controller 5, a back pressure regulating valve 4 is automatically regulated, a DCS system is arranged in the controller 5, when a power demand signal of the steam turbine 1 sent from the outside is received, the rotation speed value of the steam turbine 1 is detected by the rotation speed sensor 7, the power of the steam turbine 1 at this moment is calculated and judged according to the rotation speed value, and then compared with the power demand signal sent from the outside, if the power demand signal is not reached or exceeds the standard, the controller 5 controls the opening degree of the back pressure regulating valve 4, so that the amount of introduced air is regulated to regulate the air inlet amount conveyed by the flash main steam, and finally the rotation speed of the steam turbine 1 is regulated.
Example 1:
the specific situation of this embodiment is as follows, a certain 2000 ten thousand tons/year oil refining device will produce 3800t/h of 96 ℃ hot water per hour, it is necessary to utilize the flash evaporation device to cool the 3800t/h hot water from 96 ℃ to 81 ℃, then the negative pressure steam flashed out enters the steam turbine 1 to generate electricity, through energy balance, the steam turbine 1 will produce 100t/h steam intake at full load, the steam intake pressure is 50kPa, the steam turbine 1 exhaust side sets the back pressure to 11kPa, the utility model cancels the conventional steam intake valve (if the valve, the bore will be more than 2 meters), through the back pressure regulating valve 4 set in the exhaust side to controllably regulate the steam intake flow, thereby controlling the rotation speed and power, and the overall flash evaporation pressure index of the whole system, this means is especially suitable for the startup stage of the steam turbine 1, through the back pressure regulating valve 4 to control the steam intake flow, thereby achieving the warm-up, and the power-up, And controlling the rotating speed in the speed increasing process.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.
Claims (4)
1. The utility model provides a hot water waste heat utilization steam turbine flow control device based on flash distillation technique, includes steam turbine (1), be connected with valveless admission pipeline (2) that are used for letting in flash distillation main steam on the admission end of steam turbine (1), the play steam of steam turbine (1) is served and is connected with exhaust pipeline (3) that are used for accesss to the condenser, its characterized in that: the exhaust end of the steam turbine (1) is also provided with an adjusting mechanism for introducing air to adjust the pressure of the exhaust end of the steam turbine (1), and one side of the steam turbine (1) further comprises a controller (5) for controlling the adjusting mechanism.
2. The flow control device of the hot water waste heat utilization turbine based on the flash evaporation technology according to the claim 1, characterized in that: and a pressure transmitter (6) for detecting the transmission pressure of the flash evaporation main steam is arranged on the valveless steam inlet pipeline (2), and the pressure transmitter (6) is electrically connected with the controller (5).
3. A flow control device of a hot water residual heat utilization turbine based on a flash evaporation technology according to claim 1 or 2, characterized in that: the air inlet end of the steam turbine (1) is provided with a rotating speed sensor (7) used for detecting the rotating speed of the steam turbine (1), and the rotating speed sensor (7) is electrically connected with the controller (5).
4. The flow control device of the hot water waste heat utilization turbine based on the flash evaporation technology according to the claim 1, characterized in that: the adjusting mechanism is at least one group of back pressure adjusting valves (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220421348.8U CN216950498U (en) | 2022-02-25 | 2022-02-25 | Hot water waste heat utilization steam turbine flow control device based on flash evaporation technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220421348.8U CN216950498U (en) | 2022-02-25 | 2022-02-25 | Hot water waste heat utilization steam turbine flow control device based on flash evaporation technology |
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| CN216950498U true CN216950498U (en) | 2022-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542201A (en) * | 2022-02-25 | 2022-05-27 | 杭州汽轮机股份有限公司 | Hot water waste heat utilization steam turbine flow control system based on flash evaporation technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542201A (en) * | 2022-02-25 | 2022-05-27 | 杭州汽轮机股份有限公司 | Hot water waste heat utilization steam turbine flow control system based on flash evaporation technology |
| CN114542201B (en) * | 2022-02-25 | 2024-03-29 | 杭州汽轮动力集团股份有限公司 | Hot water waste heat utilization steam turbine flow control system based on flash evaporation technology |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 310000 Building 1, No. 608, Kangxin Road, Linping District, Hangzhou, Zhejiang Patentee after: Hangzhou Turbine Power Group Co.,Ltd. Address before: 310000 Building 1, No. 608, Kangxin Road, economic and Technological Development Zone, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU STEAM TURBINE Co.,Ltd. |
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| CP03 | Change of name, title or address |