CN216619790U - High-pressure heater drainage system of steel mill gas generator set - Google Patents
High-pressure heater drainage system of steel mill gas generator set Download PDFInfo
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- CN216619790U CN216619790U CN202122984007.XU CN202122984007U CN216619790U CN 216619790 U CN216619790 U CN 216619790U CN 202122984007 U CN202122984007 U CN 202122984007U CN 216619790 U CN216619790 U CN 216619790U
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Abstract
The utility model discloses a high pressure heater drainage system of a steel mill gas generator set, which comprises two piping systems of high pressure heater normal drainage and emergency drainage. The high-pressure normal drainage realizes high water level control through a vapor-liquid two-phase automatic drainage valve group, and drainage automatically flows to a deaerator step by step; each stage of critical drain is separately connected to the flash tank. The normal drainage pipe system consists of a gas-liquid two-phase automatic drainage valve group, a manual shut-off valve, a check valve, a reducing pipe, a single-stage orifice plate, an energy dissipation tee joint, an end enclosure and other pipe fittings, and the emergency drainage pipe system consists of a manual shut-off valve, an electric drainage valve, an energy dissipation tee joint, an end enclosure and other pipe fittings. The system has compact and reasonable structure, convenient operation and good use reliability, realizes the automatic adjustment function of the high water adding level, reduces the erosion of the drainage to equipment and pipelines, and has obvious effects on reducing the vibration of the pipelines and improving the stability of the pipelines.
Description
Technical Field
The utility model relates to a high pressure heater drainage system of a steel mill gas generator set, in particular to selection, composition and arrangement forms of pipe fittings of two piping systems of high pressure heater normal drainage and emergency drainage.
Background
The high-pressure heater is one of the main auxiliary devices of the steam turbine generator unit and is a device for heating boiler feed water by using regenerative steam extraction of a steam turbine. The boiler feed water temperature is increased, and heat and working media are recovered, so that the heat efficiency of the unit is increased, and the method plays an important role in improving the economic benefit of a power plant. The high pressure heater drainage system consists of a normal drainage pipeline and a critical drainage pipeline. The normal drainage adopts a cascade self-flowing serial mode, namely the normal drainage is drained from a high-pressure heater with higher pressure to a high-pressure heater with lower pressure, the normal drainage of the last-stage high-pressure heater is drained to a deaerator, and the emergency drainage of each stage of high-pressure heater is separately connected to a periodical pollution discharge flash tank or other flash tanks.
High pressure hydrophobic systems are prone to the following problems when put into operation: when the load of the unit changes greatly, the high water adding level changes frequently along with the load, the high-pressure emergency drainage electric door moves frequently when the load changes seriously, the high-pressure emergency drainage electric door moves and separates, the reduction of the high-pressure water adding input rate and the waste of emergency drainage working media can reduce the heat efficiency of the unit, and the frequent movement can also bring potential safety hazards to the operation of the unit. When the deaerator operates at high heating water level and low water level, part of steam enters the next-stage heater through the drainage pipeline, the heat efficiency of the heater is affected, and the deaerator can operate at overpressure possibly. Meanwhile, the erosion of steam can cause the vibration of a high-pressure drain pipeline and the looseness of a support hanger, and the phenomenon of steam and water impact generated by the flow of two-phase media in the pipeline accelerates the fatigue damage of the pipeline material, shortens the service life of the material, and even causes the breakage of the pipeline, particularly a welded junction and the failure of a system valve, thereby causing great safety risks and hidden dangers to the crew and equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a high-pressure-increasing drainage system of a steel mill gas generator set, which at least solves part of problems in the prior art.
The utility model is realized by the following steps:
the utility model provides a high pressure drainage system of a steel mill gas generator set, which comprises a normal drainage pipe system and an emergency drainage pipe system, wherein each stage of high pressure heater is communicated with a drainage inlet of a next stage of high pressure heater through the normal drainage pipe system, a final stage of high pressure heater is communicated with a deaerator through the normal drainage pipe system, the normal drainage pipe system comprises a vapor-liquid two-phase automatic drainage valve for realizing the water level control of the high pressure heater, and an emergency drainage outlet of each stage of high pressure heater is independently connected to a flash tank through the emergency drainage pipe system.
Further, the normal drain pipe system comprises a manual shut-off valve, a vapor-liquid two-phase automatic drain valve, an energy dissipation tee joint and a sealing head, a drain outlet of each stage of high-pressure heater is communicated with a first port of the vapor-liquid two-phase automatic drain valve through the manual shut-off valve, a vapor outlet of each stage of high-pressure heater is communicated with a second port of the vapor-liquid two-phase automatic drain valve through a signal pipe, the vapor valve is arranged on the signal pipe, a third port of the vapor-liquid two-phase automatic drain valve is communicated with a drain inlet of a next-stage high-pressure heater through the energy dissipation tee joint with the sealing head, and the energy dissipation tee joint corresponding to the last-stage high-pressure heater is communicated with the deaerator.
Furthermore, a reducing pipe is arranged behind the vapor-liquid two-phase automatic drain valve, and the pipe diameter and the wall thickness of a pipeline behind the vapor-liquid two-phase automatic drain valve are increased by one step compared with those in front of the valve.
Furthermore, a drain outlet of each stage of high-pressure heater is provided with a bypass which is communicated with a drain inlet of the next stage of high-pressure heater.
Furthermore, a check valve and a single-stage throttling orifice plate are arranged between the energy dissipation tee joint corresponding to the final-stage high-pressure heater and the deaerator.
Furthermore, the single-stage orifice plate is arranged close to the pipe orifice of the deaerator, and an energy dissipation tee joint with a seal head is arranged at the pipe orifice.
Furthermore, the emergency drain pipe system comprises a manual shut-off valve, an electric drain valve, an energy dissipation tee joint and a sealing head, an emergency drain outlet of each stage of the high-pressure heater is communicated with a first port of the energy dissipation tee joint through the manual shut-off valve and the electric drain valve, a second port of the energy dissipation tee joint is sealed by the sealing head, and a third port of the energy dissipation tee joint is communicated with the flash tank.
Furthermore, a reducing pipe is arranged behind the electric drain valve, and the pipe diameter and the wall thickness of a pipeline behind the electric drain valve are increased by one step compared with those of the pipeline in front of the valve.
The utility model has the following beneficial effects:
1. the liquid level of the high-pressure heater is automatically adjusted through the vapor-liquid two-phase automatic drain valve group, the liquid level of the heater can be stably operated in a certain range, full-automatic adjustment is realized, mechanical moving parts and electric elements are not used in the adjusting mode, the device sealing performance is good, the failure rate is greatly reduced, and the workload of operation and maintenance is reduced.
2. The single-stage throttling orifice plate is additionally arranged at the position, close to a deaerator pipe opening, of the final-stage heater for normally draining water to the deaerator pipeline to form two-stage throttling, cavitation damage is effectively inhibited through multi-stage step-by-step pressure reduction, the service life is prolonged, and the effects of reducing erosion of draining water to the pipeline and equipment and reducing noise and vibration of the pipeline are remarkable.
3. The energy dissipation tee joint is arranged at the turning position behind the drain valve and in front of the pipe orifice of the deaerator in a mode of connecting an end cap (a sealing head), so that the impact energy of a steam-water two-phase flow mixture can be absorbed, and the influences of vibration, noise and the like caused by steam-liquid two-phase flow are weakened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a high pressure hydrophobic system provided by an embodiment of the present invention;
FIG. 2 is an enlarged view of the right side of FIG. 1 according to an embodiment of the present invention;
fig. 3 is an enlarged view of the left side of fig. 1 provided by an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, a high pressure heater drainage system (i.e., a high pressure heater drainage system) of a gas generator set in a steel mill according to an embodiment of the present invention includes a normal drainage pipe system and an emergency drainage pipe system, each high pressure heater is communicated with a drainage inlet of a next high pressure heater through the normal drainage pipe system, a last high pressure heater is communicated with a deaerator 13 through the normal drainage pipe system, the normal drainage pipe system includes a vapor-liquid two-phase automatic drainage valve 4 for controlling a water level of the high pressure heater, and an emergency drainage outlet of each high pressure heater is separately connected to a periodic blowdown flash tank 14 through the emergency drainage pipe system. In this embodiment, three-stage high-pressure heaters including a first high-pressure heater 103, a second high-pressure heater 102, and a third high-pressure heater 101 are included, and normal drainage is performed in a cascade manner, that is, the drainage is discharged from the first high-pressure heater 103 with a higher pressure to the second high-pressure heater 102 with a lower pressure, and then to the third high-pressure heater 101 at the last stage, and the drainage of the third high-pressure heater 101 is normally discharged to the deaerator 13.
The normal drainage of the high-pressure heater realizes the water level control of the high-pressure heater through a vapor-liquid two-phase automatic drainage valve group, and the drainage automatically flows to the deaerator 13 step by step. The liquid level of the high-pressure heater is automatically adjusted through the vapor-liquid two-phase automatic drain valve group, so that the liquid level of the high-pressure heater stably runs in a certain range, and full automatic adjustment is realized.
The emergency drain flow of each stage of high-pressure heater is connected to the periodic blowdown flash tank 14 through the manual shut-off valve 5 and the electric drain valve 8. The electric drain valve 8 acts when the high-pressure heater is in a high water level state, emergency drain water is drained in time, and steam water on the side of the heater pipe is prevented from flowing back to a steam extraction opening of the steam turbine to cause water inflow of the steam turbine. The pipe specification (pipe diameter and wall thickness) of the critical water drainage pipe system is increased by one level compared with the normal water drainage pipe system.
The normal drainage pipe system comprises a manual shut-off valve 5, a vapor-liquid two-phase automatic drain valve 4, an energy dissipation tee joint 10 and a sealing head 11, wherein a drain outlet of each stage of high-pressure heater is communicated with a first port of the vapor-liquid two-phase automatic drain valve 4 through the manual shut-off valve 5 (an inlet valve), a vapor outlet of each stage of high-pressure heater is communicated with a second port of the vapor-liquid two-phase automatic drain valve 4 through a signal pipe 2, a vapor valve 3 is arranged on the signal pipe 2, a third port of the vapor-liquid two-phase automatic drain valve 4 is communicated with a drain inlet of a next-stage high-pressure heater through the energy dissipation tee joint 10 with the sealing head 11, the manual shut-off valve 5 (an outlet valve) is arranged between the energy dissipation tee joint 10 and a drain inlet of the next-stage high-pressure heater, and the energy dissipation tee joint 10 corresponding to the last-stage high-pressure heater is communicated with a deaerator 13.
The drainage outlet of each stage of high-pressure heater is provided with a bypass which is communicated with the drainage inlet of the next stage of high-pressure heater, and the bypass is provided with a bypass valve 6. A check valve 7 and a single-stage orifice plate 12 are arranged between the energy dissipation tee 10 corresponding to the final-stage high-pressure heater and the deaerator 13. The single-stage orifice plate 12 is arranged close to the pipe orifice of the deaerator 13, and an energy dissipation tee joint 10 with a seal head 11 is arranged at the pipe orifice.
The energy dissipation tee joint is arranged at the turning position behind the drain valve and in front of the pipe orifice of the deaerator in a mode of connecting an end cap (a sealing head), so that the impact energy of a steam-water two-phase flow mixture can be absorbed, and the influences of vibration, noise and the like caused by steam-liquid two-phase flow are weakened.
The last-stage high-pressure heater is provided with a single-stage throttle orifice 12 on a pipeline from normal drainage to the deaerator 13, the single-stage throttle orifice 12 is arranged close to the pipe orifice of the deaerator 13 to form two-stage throttling, cavitation erosion damage is effectively inhibited through multi-stage step-by-step pressure reduction, the service life is prolonged, and the effects of reducing erosion of drainage on pipelines and equipment and reducing noise and vibration of the pipelines are remarkable.
The emergency drain pipe system comprises a manual shut-off valve 5, an electric drain valve 8, an energy dissipation tee joint 10 and a seal head 11, an emergency drain outlet of each stage of high-pressure heater is communicated with a first port of the energy dissipation tee joint 10 through the manual shut-off valve 5 and the electric drain valve 8, a second port of the energy dissipation tee joint 10 is blocked by the seal head 11, and a third port of the energy dissipation tee joint 10 is communicated with a flash tank 14.
The back of the vapor-liquid two-phase automatic drain valve 4 is provided with a reducing pipe 9, and the pipe diameter and the wall thickness of the back pipeline of the vapor-liquid two-phase automatic drain valve 4 are increased by one step compared with those of the front pipeline of the valve. The back of the electric steam trap 8 is provided with a reducing pipe 9, and the pipe diameter and the wall thickness of the pipeline behind the electric steam trap 8 are increased by one step compared with those in front of the trap to prevent erosion.
The embodiment of the utility model provides a water draining method of a high pressure water draining system of a steel mill gas generator set, which comprises the following steps: the system comprises normal drainage and emergency drainage, wherein the normal drainage pipe system comprises a manual shut-off valve, a vapor-liquid two-phase automatic drainage valve, an energy dissipation tee joint and a sealing head, the emergency drainage pipe system comprises a manual shut-off valve, an electric drainage valve, an energy dissipation tee joint and a sealing head, a check valve and a single-stage orifice plate are arranged between the energy dissipation tee joint corresponding to a final-stage high-pressure heater and a deaerator, the single-stage orifice plate is arranged close to a pipe orifice of the deaerator to form two-stage throttling, cavitation damage is effectively inhibited through multi-stage step pressure reduction, and the pipe orifice is provided with the energy dissipation tee joint with the sealing head to absorb impact energy of a vapor-water two-phase flow mixture;
normal drainage adopts a cascade connection mode of self-flow step by step, the normal drainage is discharged from a high-pressure heater (a first high-pressure heater 103) with higher pressure to a final-stage high-pressure heater (a third high-pressure heater 101) with lower pressure, the normal drainage of the final-stage high-pressure heater is discharged to a deaerator 13, the normal drainage of the high-pressure heater realizes the water level control of the high-pressure heater through a vapor-liquid two-phase automatic drainage valve 4, the drainage flows out from a drainage outlet of the high-pressure heater and enters the next-stage high-pressure heater through the vapor-liquid two-phase automatic drainage valve 4;
the emergency drain flow of each stage of high-pressure heater is connected to the flash tank through the manual shut-off valve 5 and the electric drain valve 8.
In normal drainage, when the water level of the high-pressure heater is low, steam flows into a steam-liquid two-phase automatic drain valve 4 through a steam valve 3 by a signal pipe 2, the steam and the drain are mixed and flow to the throat part of a valve cavity, the effective flow area of the drain is reduced due to the mixing of the steam because the flow area of the throat part is unchanged, so that the drain flow is reduced, the liquid level in the high-pressure heater is increased, when the liquid level of the high-pressure heater reaches a normal value, the steam in the signal pipe 2 is cut off, so that the effective flow area of the drain is increased, the drain flow is increased along with the increase of the drain flow, the liquid level in the high-pressure heater is reduced, the reciprocating adjustment is carried out, the liquid level of the high-pressure heater is always kept in a certain range to operate, the drain in a final-stage high-pressure heater (a third high-pressure heater 101) is drained into a deaerator 13 through a manual shutoff valve 5, a check valve 7 and a single-stage throttling orifice plate 12, in emergency drainage, the electric drain valve acts when the high water level of the high-pressure heater gives an alarm, and the emergency drainage is drained to the flash tank in time.
A high-pressure drainage system of a steel mill gas generator set comprises a normal drainage and emergency drainage two-way pipe system, wherein high-pressure drainage and normal drainage realize high water level control through a vapor-liquid two-phase automatic drainage valve group, and drainage automatically flows to a deaerator step by step; each stage of critical drain is separately connected to the flash tank. The normal drainage pipe system consists of a gas-liquid two-phase automatic drainage valve group, a manual shut-off valve, a check valve, a reducing pipe, a single-stage orifice plate, an energy dissipation tee joint, an end enclosure and other pipe fittings, and the emergency drainage pipe system consists of a manual shut-off valve, an electric drainage valve, an energy dissipation tee joint, an end enclosure and other pipe fittings.
The liquid level of the heater is automatically adjusted through a vapor-liquid two-phase automatic drain valve group. In the selection of the pipeline components, the pipe diameter and the wall thickness of the pipeline behind the trap are increased by one step compared with those in front of the trap. In the pipeline arrangement, a single-stage throttle orifice plate is arranged at the position close to the pipe orifice of the deaerator for the pipeline from the drain of the final-stage heater to the deaerator. Meanwhile, the arrangement form of an energy dissipation tee joint connecting end socket is adopted at the rear turning part of the drain valve, in front of the pipe orifice of the deaerator and behind the single-stage throttling orifice plate.
The vapor-liquid two-phase automatic drain valve group can control the liquid level of the heater within a certain range, and full-automatic adjustment is realized.
A single-stage throttle orifice plate is arranged in front of the pipe orifice of the deaerator to form two-stage throttling, cavitation erosion damage is effectively inhibited through multi-stage step-by-step pressure reduction, the service life is prolonged, and the deaerator has remarkable effects of reducing erosion of drainage on pipelines and equipment and reducing noise and vibration of the pipelines.
The energy dissipation tee joint adopted in the arrangement is connected with the plug, so that the impact energy of the steam-water two-phase flow mixture can be absorbed, and the influences of vibration, noise and the like caused by steam-liquid two-phase flow are weakened.
The utility model realizes the automatic adjusting function of the high water adding level, reduces the erosion of the drain to equipment and pipelines, and has obvious effects on reducing the vibration of the pipelines and improving the stability of the pipelines.
The utility model is realized by the following technical scheme: the system comprises a high pressure normal drainage pipeline and an emergency drainage pipeline: the high-pressure normal drainage realizes high water level control through a vapor-liquid two-phase automatic drainage valve group, and drainage automatically flows to a deaerator step by step; each stage of critical drain is separately connected to the flash tank. The normal drainage pipe system consists of a gas-liquid two-phase automatic drainage valve group, a manual shut-off valve, a check valve, a reducing pipe, a single-stage orifice plate, an energy dissipation tee joint, an end enclosure and other pipe fittings, and the emergency drainage pipe system consists of a manual shut-off valve, an electric drainage valve, an energy dissipation tee joint, an end enclosure and other pipe fittings.
In the high pressure normal drainage system, the liquid level of the heater is automatically adjusted through a vapor-liquid two-phase automatic drainage valve group.
In the high pressure normal drainage system, the pipe diameter and the wall thickness of a pipeline behind the drain valve are increased by one step compared with those in front of the valve.
The high pressure heater normal drainage system drains water to a deaerator pipeline for a final-stage heater, and a single-stage throttle orifice is arranged at a position close to a deaerator pipeline opening.
The high-pressure normal drainage system adopts an arrangement form of an energy dissipation tee joint connecting end socket at the rear turning part of the drainage valve, in front of the pipe orifice of the deaerator and behind the single-stage throttling orifice plate.
The high pressure critical drainage system has a pipeline specification which is one-level larger than that of normal drainage.
In the high-pressure emergency drainage system, the arrangement form of energy dissipation tee joint connecting seal heads is adopted at the rear turning part of the drainage valve.
As shown in figure 1, the high pressure drainage system of the steel mill gas generator set comprises a normal drainage pipeline (piping system) and a critical drainage pipeline.
The normal drainage adopts a cascade connection mode of gravity flow step by step, namely the drainage is discharged from a first high-pressure heater 103 with higher pressure to a second high-pressure heater 102 with lower pressure and then to a third high-pressure heater 101 at the last stage, and the normal drainage of the third high-pressure heater 101 is finally discharged to a deaerator 13. The high-pressure normal drainage realizes high water level control through a vapor-liquid two-phase automatic drainage valve group, drainage flows out from a drainage outlet of a high-pressure heater, flows through an inlet valve (a manual shut-off valve 5), a vapor-liquid two-phase automatic drainage valve 4 and an outlet valve (the manual shut-off valve 5) and enters a next-stage high-pressure heater, a reducing pipe 9 is arranged behind the vapor-liquid two-phase automatic drainage valve 4, the specification of a pipeline (the pipe diameter and the wall thickness) behind the valve is increased by one stage compared with that of the pipeline in front of the valve, and meanwhile, a bypass valve 6 is arranged. The arrangement form of an energy dissipation tee joint 10 and an upper end socket 11 is adopted at the rear pipeline turning part and the upper turning part of a signal pipe of the vapor-liquid two-phase automatic drain valve, so that the erosion of vapor-liquid two-phase flow to the pipeline and equipment is reduced to the maximum extent.
When the water level of the high-pressure heater is low, steam passes through the steam valve 3 through the signal pipe 2 and flows into the steam-liquid two-phase automatic drain valve 4, the steam and the drain are mixed and flow to the throat part of the valve cavity, and the effective flow area of the drain is reduced due to the mixing of the steam because the flow area of the throat part is unchanged, so that the drain flow is reduced, and the liquid level in the high-pressure heater is increased. When the liquid level reaches a normal value, steam in the signal pipe 2 is cut off, so that the effective flow area of drainage is increased, the drainage quantity is increased, the liquid level in the high-pressure heater is reduced, the high-pressure heater is adjusted in a reciprocating mode, and the liquid level of the high-pressure heater is kept in a certain range to operate all the time. And the drained water in the final-stage high-pressure heater (the third high-pressure heater 101) is discharged into a deaerator 13 through a manual shutoff valve 5, a check valve 7, a single-stage orifice plate 12 and the like. At the drain inlet (the deaerator pipe orifice) of the deaerator, the arrangement form of an energy dissipation tee joint and a blocking plate is also adopted to reduce the erosion of the gas-liquid two-phase flow to the pipe system and equipment.
When the high-pressure heater is drained in emergency, the water flows through the manual shut-off valve 5 and the electric drain valve 8 and is independently connected to a periodical blowdown flash tank or other flash equipment. The electric drain valve 8 acts when the high-pressure heater is in a high water level state, emergency drain water is drained in time, and steam water on the side of the heater pipe is prevented from flowing back to a steam extraction opening of the steam turbine to cause water inflow of the steam turbine. The pipe diameter and the wall thickness of the pipeline behind the electric drain valve are increased by one step compared with those in front of the valve so as to prevent erosion.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a steel mill gas generating set's height adds hydrophobic system which characterized in that: the system comprises a normal drainage pipe system and an emergency drainage pipe system, wherein each stage of high-pressure heater is communicated with a drainage inlet of a next stage of high-pressure heater through the normal drainage pipe system, a final stage of high-pressure heater is communicated with a deaerator through the normal drainage pipe system, the normal drainage pipe system comprises a vapor-liquid two-phase automatic drainage valve for realizing the water level control of the high-pressure heater, and an emergency drainage outlet of each stage of high-pressure heater is independently connected to a flash tank through the emergency drainage pipe system.
2. The high pressure drainage system of a steel mill gas generator set according to claim 1, characterized in that: the normal drainage pipe system comprises a manual shut-off valve, a vapor-liquid two-phase automatic drainage valve, an energy dissipation tee joint and a sealing head, wherein a drainage outlet of each stage of high-pressure heater is communicated with a first port of the vapor-liquid two-phase automatic drainage valve through the manual shut-off valve, a vapor outlet of each stage of high-pressure heater is communicated with a second port of the vapor-liquid two-phase automatic drainage valve through a signal pipe, the vapor valve is arranged on the signal pipe, a third port of the vapor-liquid two-phase automatic drainage valve is communicated with a drainage inlet of a next stage of high-pressure heater through the energy dissipation tee joint with the sealing head, and the energy dissipation tee joint corresponding to the last stage of high-pressure heater is communicated with the deaerator.
3. The high pressure drainage system of a steel mill gas generator set according to claim 2, characterized in that: a reducing pipe is arranged behind the vapor-liquid two-phase automatic drain valve, and the pipe diameter and the wall thickness of a pipeline behind the vapor-liquid two-phase automatic drain valve are increased by one step compared with those in front of the valve.
4. The high pressure drainage system of a steel mill gas generator set according to claim 2, characterized in that: the drainage outlet of each stage of high-pressure heater is provided with a bypass which is communicated with the drainage inlet of the next stage of high-pressure heater.
5. The high pressure drainage system of a steel mill gas generator set according to claim 2, characterized in that: a check valve and a single-stage throttling orifice plate are arranged between the energy dissipation tee joint corresponding to the final-stage high-pressure heater and the deaerator.
6. The high pressure drainage system of a steel mill gas generator set according to claim 5, characterized in that: the single-stage orifice plate is arranged close to the pipe orifice of the deaerator, and an energy dissipation tee joint with a seal head is arranged at the pipe orifice.
7. The high pressure drainage system of a steel mill gas generator set according to claim 1, characterized in that: the emergency drainage pipe system comprises a manual shut-off valve, an electric drain valve, an energy dissipation tee joint and a sealing head, wherein an emergency drainage outlet of each stage of high-pressure heater is communicated with a first port of the energy dissipation tee joint through the manual shut-off valve and the electric drain valve, a second port of the energy dissipation tee joint is sealed by the sealing head, and a third port of the energy dissipation tee joint is communicated with the flash tank.
8. The high pressure drainage system of a steel mill gas generator set according to claim 7, characterized in that: a reducing pipe is arranged behind the electric drain valve, and the pipe diameter and the wall thickness of a pipeline behind the electric drain valve are increased by one step compared with those of the pipeline in front of the valve.
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| CN202122984007.XU CN216619790U (en) | 2021-11-30 | 2021-11-30 | High-pressure heater drainage system of steel mill gas generator set |
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| CN202122984007.XU CN216619790U (en) | 2021-11-30 | 2021-11-30 | High-pressure heater drainage system of steel mill gas generator set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060791A (en) * | 2021-11-30 | 2022-02-18 | 中冶南方都市环保工程技术股份有限公司 | High-pressure-increasing drainage system and drainage method for steel mill gas generator set |
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2021
- 2021-11-30 CN CN202122984007.XU patent/CN216619790U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060791A (en) * | 2021-11-30 | 2022-02-18 | 中冶南方都市环保工程技术股份有限公司 | High-pressure-increasing drainage system and drainage method for steel mill gas generator set |
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