CN112664835A - Split type steam temperature and pressure reducing device and working method thereof - Google Patents
Split type steam temperature and pressure reducing device and working method thereof Download PDFInfo
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- CN112664835A CN112664835A CN202110030867.1A CN202110030867A CN112664835A CN 112664835 A CN112664835 A CN 112664835A CN 202110030867 A CN202110030867 A CN 202110030867A CN 112664835 A CN112664835 A CN 112664835A
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Abstract
The invention discloses a split type steam temperature and pressure reducing device and a working method thereof, which are mainly applied to the field of cutting off a low-pressure cylinder of a heat supply unit and the like which need to reduce the temperature and the pressure of steam, and can also be applied to other fields. The device comprises a steam inlet pipeline, a pressure reducing regulating valve, a temperature reducing water inlet pipeline, a stop valve, a throttle valve, a temperature reducing regulating valve, a filter, a check valve, an atomizing nozzle, a mixing pipeline, a pressure transmitter, a thermal resistor and a steam outlet pipeline. The device can convert high-temperature high-pressure steam into the temperature and pressure required by the low-pressure cylinder of the heat supply unit, so as to meet the requirement on the parameter change of the cooling steam after the working condition of the steam turbine changes. The invention can accurately control the temperature and pressure parameters of the output steam, has small deviation range, improves the effect of temperature and pressure reduction, solves the problem that the nozzle is easy to be blocked by the temperature reduction water, and prolongs the service life of the device.
Description
Technical Field
The invention relates to a split type steam temperature and pressure reducing device and a working method thereof, which are mainly applied to the field of cutting off a low-pressure cylinder of a heat supply unit and the like which need to reduce the temperature and the pressure of steam, and can also be applied to other fields.
Background
The steam temperature and pressure reducing device is a steam heat energy parameter conversion device widely applied in modern thermal power generation, and various high-temperature and high-pressure steam parameters are reduced to the temperature and pressure required by a user through the device so as to meet the use requirements of the user. Especially when the heat supply unit cuts off low pressure cylinder running state, in order to prevent that blast air friction from producing heat and leading to low pressure cylinder blade deformation, the steam that needs the pressure relief device of reducing the temperature to provide suitable temperature pressure takes away the heat with low pressure cylinder to guarantee that the steam turbine can stabilize the safe operation after cutting off low pressure cylinder.
The existing temperature and pressure reducing device has the problems of unstable temperature and pressure parameters of output steam, easy blockage of a nozzle and the like, and influences the popularization of the technology of cutting off a low-pressure cylinder of a heat supply unit.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and provides a split type steam temperature and pressure reducing device suitable for cutting a low pressure cylinder and a working method thereof.
The technical scheme adopted by the invention for solving the problems is as follows: a split type steam temperature and pressure reducing device is characterized by comprising a steam inlet pipeline, a pressure reducing regulating valve, a temperature reducing water inlet pipeline, a stop valve, a throttle valve, a temperature reducing regulating valve, a filter, a check valve, an atomizing nozzle, a mixing pipeline, a pressure transmitter, a thermal resistor and a steam outlet pipeline.
The pressure reducing regulating valve is arranged on the steam inlet pipeline to form a pressure reducing system; the stop valve, the throttle valve, the temperature-reducing regulating valve, the filter, the check valve and the atomizing nozzle are sequentially arranged on a temperature-reducing water inlet pipeline to form a temperature-reducing system; the steam inlet pipeline is connected with the mixing pipeline, and the atomizing nozzles are positioned at the outlet of the steam inlet pipeline and the inlet of the mixing pipeline and are arranged along the axis of the mixing pipeline; the pressure transmitter and the thermal resistor are arranged on the steam outlet pipeline and used for measuring the pressure and the temperature of outlet steam.
Preferably, the pressure reducing regulating valve is an electric sleeve regulating valve, an outlet steam pressure signal is measured by a pressure transmitter arranged on a steam outlet pipeline, a signal is fed back to an actuating mechanism of the pressure reducing regulating valve by a PID regulator of a switching low pressure cylinder DCS system, a valve rod is regulated by the actuating mechanism to act, a valve core moves up and down in a sleeve to change the size of the channel area of the sleeve, and high-temperature high-pressure steam is throttled and reduced in pressure, so that the outlet steam pressure is the pressure required by a cooling blade of the switching low pressure cylinder system.
Preferably, the desuperheating water supplied by the desuperheating water inlet pipeline is boiler condensed water, the quality of the condensed water is better and has a certain pressure, and the blockage of an atomizing nozzle can be avoided.
Furthermore, the throttle valve can control the flow of the desuperheating water, and the desuperheating regulating valve is ensured to be in the flow adjustable range.
Preferably, the temperature-reducing regulating valve is an electric single-seat regulating valve, an outlet steam temperature signal is measured through a thermal resistor arranged on a steam outlet pipeline, a signal is fed back to an actuating mechanism of the temperature-reducing regulating valve through a PID regulator of a switching-down pressure cylinder DCS system, a valve rod is regulated by the actuating mechanism to act, a valve clack moves up and down in a valve seat so as to change the size of a passage area of the valve seat to control the flow of the temperature-reducing water sent to an atomizing nozzle, and the temperature of the high-temperature steam is reduced after the high-temperature steam and the atomizing temperature-reducing water are mixed, so that the outlet steam temperature reaches the temperature required by a cooling.
Preferably, the filter is used for cleaning impurities in the temperature-reduced water, and is preferably below 60 meshes (0.25 mm).
Further, the check valve is used to prevent steam from leaking from the atomizing nozzle to the desuperheating system.
Preferably, the spring atomizing nozzle is preferably selected as the atomizing nozzle, the spraying effect of the spring atomizing nozzle is good, and the temperature reducing effect of atomized temperature reducing water in the mixing pipeline can be improved.
Preferably, the length of the mixing pipeline is not shorter than 8 pipe diameters, so that the atomized temperature-reduced water and the high-temperature steam are fully mixed to achieve the purpose of temperature reduction, and the generation of hydrophobic water is reduced.
Further, pressure transmitter and thermal resistance install in the steam outlet pipeline, can accurate measurement export steam's pressure and temperature, and pressure transmitter and thermal resistance feed back the signal to cutting low pressure cylinder DCS system, cut low pressure cylinder DCS system and carry out PID according to the required pressure of cooling blade and temperature and calculate, adjust pressure reduction regulating valve and desuperheating regulating valve through the PID regulator.
Compared with the prior art, the invention has the following advantages and effects: the temperature and pressure parameters of the output steam can be accurately controlled, the deviation range is small, and the temperature and pressure reducing effect is improved; the problem that the nozzle is easily blocked by the desuperheating water is solved, and the service life of the device is prolonged.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
In the figure: the device comprises a steam inlet pipeline 1, a pressure reducing regulating valve 2, a temperature reducing water inlet pipeline 3, a stop valve 4, a throttle valve 5, a temperature reducing regulating valve 6, a filter 7, a check valve 8, an atomizing nozzle 9, a mixing pipeline 10, a pressure transmitter 11, a thermal resistor 12 and a steam outlet pipeline 13.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, in this embodiment, a split type steam temperature and pressure reducing device includes a steam inlet pipeline 1, a pressure reducing regulating valve 2, a temperature reducing water inlet pipeline 3, a stop valve 4, a throttle valve 5, a temperature reducing regulating valve 6, a filter 7, a check valve 8, an atomizing nozzle 9, a mixing pipeline 10, a pressure transmitter 11, a thermal resistor 12 and a steam outlet pipeline 13.
The pressure reducing regulating valve 2 is arranged on the steam inlet pipeline 1 to form a pressure reducing system; the stop valve 4, the throttle valve 5, the temperature-reducing regulating valve 6, the filter 7, the check valve 8 and the atomizing nozzle 9 are sequentially arranged on the temperature-reducing water inlet pipeline 3 to form a temperature-reducing system; the steam inlet pipeline 1 is connected with a mixing pipeline 10, and the atomizing nozzle 9 is positioned at the outlet of the steam inlet pipeline 1 and the inlet of the mixing pipeline 10 and is arranged along the axis of the mixing pipeline 10; a pressure transducer 11 and a thermal resistor 12 are mounted on the steam outlet pipe 13 for measuring the pressure and temperature of the outlet steam.
The pressure reducing regulating valve 2 adopts an electric sleeve regulating valve, an outlet steam pressure signal is measured through a pressure transmitter 11 arranged on a steam outlet pipeline 13, a PID regulator of a low-pressure cylinder DCS system feeds back a signal to an actuating mechanism of the pressure reducing regulating valve 2, a valve rod is regulated by the actuating mechanism to act, a valve core moves up and down in a sleeve to change the size of the passage area of the sleeve, high-temperature high-pressure steam is throttled and decompressed, and therefore the outlet steam pressure is the pressure required by a cooling blade of the low-pressure cylinder system.
The desuperheating water supplied by the desuperheating water inlet pipeline 3 is boiler condensed water, the quality of the condensed water is better and has certain pressure, and the blockage of the atomizing nozzle 9 can be avoided.
The throttle valve 5 can control the flow of the desuperheating water, and the desuperheating regulating valve 6 is ensured to be in the flow adjustable range.
The temperature reducing regulating valve 6 adopts an electric single-seat regulating valve, an outlet steam temperature signal is measured through a thermal resistor 12 arranged on a steam outlet pipeline 13, a PID regulator of a low-pressure cylinder DCS system feeds back a signal to an actuating mechanism of the temperature reducing regulating valve 6, a valve rod is regulated by the actuating mechanism to act, so that a valve clack moves up and down in a valve seat to change the size of a passage area of the valve seat to control the flow of temperature reducing water sent to the atomizing nozzle 9, the temperature of the mixed high-temperature steam and the atomized temperature reducing water is reduced, and the temperature of the outlet steam reaches the temperature required by a cooling blade of the low-pressure cylinder system.
The filter 7 is used for cleaning impurities in the temperature-reducing water, and is selected to be below 60 meshes (0.25 mm).
The check valve 8 is used to prevent steam from leaking from the atomizing nozzle 9 to the desuperheating system.
The atomizing nozzle 9 is a spring atomizing nozzle, the spraying effect of the spring atomizing nozzle is good, and the temperature reduction effect of atomized temperature reduction water in the mixing pipeline 10 can be improved.
The length of the mixing pipeline 10 is not shorter than 8 times of pipe diameter, so that the atomized temperature-reducing water and the high-temperature steam are fully mixed to achieve the purpose of temperature reduction, and the generation of hydrophobic water is reduced.
The working method comprises the following steps: high-temperature and high-pressure steam enters from a steam inlet pipeline 1, sequentially passes through a pressure reduction regulating valve 2, an atomizing nozzle 9, a mixing pipeline 10, a pressure transmitter 11 and a thermal resistor 12, finally flows out from a steam outlet pipeline 13 and enters a low-pressure cylinder. The pressure reduction principle is that an outlet steam pressure signal is measured through a pressure transmitter 11 arranged on a steam outlet pipeline 13, a PID regulator of a low-pressure cylinder DCS system feeds back a signal to an actuating mechanism of a pressure reduction regulating valve 2, a valve rod is regulated by the actuating mechanism to act, a valve core moves up and down in a sleeve to change the size of the channel area of the sleeve, high-temperature high-pressure steam is throttled and reduced in pressure, and therefore the outlet steam pressure reaches the pressure required by a cooling blade of the low-pressure cylinder system.
The desuperheating water enters from a desuperheating water inlet pipeline 3, sequentially passes through a stop valve 4, a throttle valve 5, a desuperheating regulating valve 6, a filter 7 and a check valve 8, and finally enters a mixing pipeline 10 through an atomizing nozzle 9. After the stop valve 4 is opened, condensed water enters from the temperature-reducing water inlet pipeline 3, and the flow of the temperature-reducing water is within the adjustable range of the temperature-reducing adjusting valve 6 through the throttling function of the throttle valve 5. The filter 7 can clean impurities of the desuperheating water and ensure the quality of the desuperheating water entering the atomizing nozzle 9. The check valve 8 prevents steam from leaking from the atomizing nozzle 9 to the desuperheating system. The desuperheating water is atomized by the atomizing nozzle 9 and enters the mixing pipeline 10, and is fully mixed with the high-temperature steam flowing out of the pressure reduction regulating valve 2 and then cooled. The temperature reduction principle is that an outlet steam temperature signal is measured through a thermal resistor 12 arranged on a steam outlet pipeline 13, a PID regulator of a low-pressure cylinder DCS system feeds back a signal to an actuating mechanism of a temperature reduction regulating valve 6, the actuating mechanism regulates a valve rod to act, so that a valve clack moves up and down in a valve seat to change the size of the passage area of the valve seat to control the flow of temperature reduction water sent to an atomizing nozzle 9, the temperature is reduced after high-temperature steam and the atomized temperature reduction water are mixed, and the outlet steam temperature reaches the temperature required by a cooling blade of the low-pressure cylinder system.
Finally, after the high-temperature and high-pressure steam passes through the split type steam temperature-reducing and pressure-reducing device, the pressure and temperature parameters are reduced, and the pressure and temperature required by cutting the cooling blades of the low-pressure cylinder system are achieved.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (10)
1. A split type steam temperature and pressure reducing device is characterized by comprising a steam inlet pipeline (1), a pressure reducing regulating valve (2), a temperature reducing water inlet pipeline (3), a stop valve (4), a throttle valve (5), a temperature reducing regulating valve (6), a filter (7), a check valve (8), an atomizing nozzle (9), a mixing pipeline (10), a pressure transmitter (11), a thermal resistor (12) and a steam outlet pipeline (13); the pressure reducing regulating valve (2) is arranged on the steam inlet pipeline (1) to form a pressure reducing system; the stop valve (4), the throttle valve (5), the temperature reduction regulating valve (6), the filter (7), the check valve (8) and the atomizing nozzle (9) are sequentially arranged on the temperature reduction water inlet pipeline (3) to form a temperature reduction system; the steam inlet pipeline (1) is connected with a mixing pipeline (10), and the atomizing nozzle (9) is positioned at the outlet of the steam inlet pipeline (1) and the inlet of the mixing pipeline (10) and is arranged along the axis of the mixing pipeline (10); the pressure transmitter (11) and the thermal resistor (12) are arranged on the steam outlet pipeline (13) and used for measuring the pressure and the temperature of outlet steam.
2. The split type steam temperature and pressure reducing device according to claim 1, wherein the pressure reducing regulating valve (2) is an electric sleeve regulating valve, an outlet steam pressure signal is measured by a pressure transmitter (11) installed in a steam outlet pipeline (13), a signal is fed back to an executing mechanism of the pressure reducing regulating valve (2) by a PID regulator of a switching low pressure cylinder DCS system, and a valve rod is regulated by the executing mechanism to act, so that a valve core moves up and down in a sleeve to change the size of the channel area of the sleeve, high-temperature high-pressure steam is throttled and reduced in pressure, and the outlet steam pressure is the pressure required by a cooling blade of the switching low pressure cylinder system.
3. The split type steam temperature and pressure reducing device according to claim 1, wherein the temperature reducing water supplied by the temperature reducing water inlet pipeline (3) is boiler condensed water.
4. The split type steam temperature and pressure reducing device as claimed in claim 1, wherein the throttle valve (5) controls the flow of the temperature reducing water to ensure that the temperature reducing regulating valve (6) is within the flow adjustable range.
5. The split type steam temperature and pressure reducing device of claim 1, wherein the temperature reducing regulating valve (6) is an electric single-seat regulating valve, an outlet steam temperature signal is measured through a thermal resistor (12) arranged on a steam outlet pipeline (13), a PID regulator of a switching low pressure cylinder DCS system feeds back a signal to an actuating mechanism of the temperature reducing regulating valve (6), a valve rod is adjusted by the actuating mechanism to act, a valve clack moves up and down in a valve seat, the flow of the temperature reducing water sent to the atomizing nozzle (9) is controlled by changing the size of the passage area of the valve seat, and the temperature of the high-temperature steam and the atomized temperature reducing water is reduced after mixing, so that the outlet steam temperature reaches the temperature required by a cooling blade of the switching low pressure cylinder system.
6. The split type steam temperature and pressure reducing device as claimed in claim 1, wherein the filter (7) is used for cleaning impurities in the temperature reduced water, and the type below 60 meshes is selected.
7. Split steam attemperation and pressure reduction device according to claim 1, characterized in that the check valve (8) prevents steam from leaking from the atomizing nozzle (9) to the attemperation system.
8. The split type steam temperature and pressure reducing device as claimed in claim 1, wherein the atomizing nozzle (9) is a spring atomizing nozzle.
9. The split-type steam temperature and pressure reducing device according to claim 1, wherein the length of the mixing pipeline (10) is not less than 8 pipe diameters.
10. A working method of the split type steam temperature and pressure reducing device as claimed in any one of claims 1 to 9, characterized by comprising the following steps: high-temperature and high-pressure steam enters from a steam inlet pipeline (1), sequentially passes through a pressure reduction regulating valve (2), an atomizing nozzle (9), a mixing pipeline (10), a pressure transmitter (11) and a thermal resistor (12), finally flows out from a steam outlet pipeline (13) and enters a low-pressure cylinder; an outlet steam pressure signal is measured through a pressure transmitter (11) arranged on a steam outlet pipeline (13), a signal is fed back to an actuating mechanism of the pressure reducing regulating valve (2) through a PID regulator of a low pressure cylinder DCS system, a valve rod is regulated by the actuating mechanism to act, a valve core moves up and down in a sleeve to change the size of the channel area of the sleeve, high-temperature high-pressure steam is throttled and reduced in pressure, and therefore the outlet steam pressure reaches the pressure required by a cooling blade of the low pressure cylinder system;
the desuperheating water enters from a desuperheating water inlet pipeline (3), sequentially passes through a stop valve (4), a throttle valve (5), a desuperheating regulating valve (6), a filter (7) and a check valve (8), and finally enters into a mixing pipeline (10) through an atomizing nozzle (9); after the stop valve (4) is opened, condensed water enters from the temperature-reducing water inlet pipeline (3) and passes through the throttling action of the throttle valve (5), and the flow of the temperature-reducing water is within the adjustable range of the temperature-reducing regulating valve (6); the filter (7) can clean impurities in the desuperheating water and ensure the quality of the desuperheating water entering the atomizing nozzle (9); the check valve (8) prevents steam from leaking from the atomizing nozzle (9) to the desuperheating system; the temperature-reduced water is atomized by an atomizing nozzle (9) and enters a mixing pipeline (10) to be fully mixed with high-temperature steam flowing out of a pressure-reducing regulating valve (2) and then cooled; an outlet steam temperature signal is measured through a thermal resistor (12) arranged on a steam outlet pipeline (13), a signal is fed back to an actuating mechanism of a temperature reduction regulating valve (6) through a PID regulator of a low-pressure cylinder DCS system, a valve rod is regulated by the actuating mechanism to act, a valve clack moves up and down in a valve seat to change the size of the passage area of the valve seat to control the flow of temperature reduction water sent to an atomizing nozzle (9), the temperature is reduced after high-temperature steam and the atomized temperature reduction water are mixed, and therefore the outlet steam temperature reaches the temperature required by a cooling blade of the low-pressure cylinder system;
finally, after the high-temperature and high-pressure steam passes through the split type steam temperature-reducing and pressure-reducing device, the pressure and temperature parameters are reduced, and the pressure and temperature required by cutting the cooling blades of the low-pressure cylinder system are achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110030867.1A CN112664835A (en) | 2021-01-11 | 2021-01-11 | Split type steam temperature and pressure reducing device and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110030867.1A CN112664835A (en) | 2021-01-11 | 2021-01-11 | Split type steam temperature and pressure reducing device and working method thereof |
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| CN112664835A true CN112664835A (en) | 2021-04-16 |
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| CN202110030867.1A Pending CN112664835A (en) | 2021-01-11 | 2021-01-11 | Split type steam temperature and pressure reducing device and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118189057A (en) * | 2024-05-17 | 2024-06-14 | 艾坦姆流体控制技术(山东)有限公司 | Heat tracing temperature and pressure reducing device for pipeline |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997003313A1 (en) * | 1995-07-10 | 1997-01-30 | Btg Källe Inventing Ab | Device and method relating to a pressure-regulating valve |
| CN104501132A (en) * | 2014-12-16 | 2015-04-08 | 杭州华惠阀门有限公司 | Steam temperature-reducing system |
| CN206330116U (en) * | 2016-12-16 | 2017-07-14 | 杭州华惠阀门有限公司 | A kind of boiler spray desuperheating device |
| CN207945488U (en) * | 2018-02-02 | 2018-10-09 | 广州美阀流体控制设备有限公司 | A kind of temperature reducing and pressure reducing system |
| CN109210375A (en) * | 2018-10-16 | 2019-01-15 | 马鞍山沐及信息科技有限公司 | A kind of Desuperheating and decompressing device for steam |
| US20190178450A1 (en) * | 2016-03-25 | 2019-06-13 | Wuzhong Instrument Co., Ltd. | Integrated Temperature and Pressure Reducing Device |
| CN211316149U (en) * | 2019-12-17 | 2020-08-21 | 河北冀东管件制造有限公司 | Pipeline flow desuperheater |
-
2021
- 2021-01-11 CN CN202110030867.1A patent/CN112664835A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997003313A1 (en) * | 1995-07-10 | 1997-01-30 | Btg Källe Inventing Ab | Device and method relating to a pressure-regulating valve |
| CN104501132A (en) * | 2014-12-16 | 2015-04-08 | 杭州华惠阀门有限公司 | Steam temperature-reducing system |
| US20190178450A1 (en) * | 2016-03-25 | 2019-06-13 | Wuzhong Instrument Co., Ltd. | Integrated Temperature and Pressure Reducing Device |
| CN206330116U (en) * | 2016-12-16 | 2017-07-14 | 杭州华惠阀门有限公司 | A kind of boiler spray desuperheating device |
| CN207945488U (en) * | 2018-02-02 | 2018-10-09 | 广州美阀流体控制设备有限公司 | A kind of temperature reducing and pressure reducing system |
| CN109210375A (en) * | 2018-10-16 | 2019-01-15 | 马鞍山沐及信息科技有限公司 | A kind of Desuperheating and decompressing device for steam |
| CN211316149U (en) * | 2019-12-17 | 2020-08-21 | 河北冀东管件制造有限公司 | Pipeline flow desuperheater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118189057A (en) * | 2024-05-17 | 2024-06-14 | 艾坦姆流体控制技术(山东)有限公司 | Heat tracing temperature and pressure reducing device for pipeline |
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Application publication date: 20210416 |