CN109026229B - High-pressure steam pressure-reducing, temperature-reducing and noise-reducing system - Google Patents
High-pressure steam pressure-reducing, temperature-reducing and noise-reducing system Download PDFInfo
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- CN109026229B CN109026229B CN201810812148.3A CN201810812148A CN109026229B CN 109026229 B CN109026229 B CN 109026229B CN 201810812148 A CN201810812148 A CN 201810812148A CN 109026229 B CN109026229 B CN 109026229B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Details Of Valves (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a high-pressure steam depressurization cooling noise reduction system, which comprises a boiler island outputting high-pressure steam, wherein the boiler island is connected with an inlet end of a high-pressure steam depressurization valve through a high-pressure steam main pipe, an outlet end of the high-pressure steam depressurization valve is connected with a low-pressure steam pipeline through a noise reduction plate, a pressure controller for controlling the steam pressure of the low-pressure steam pipeline is further arranged on the low-pressure steam pipeline, the low-pressure steam pipeline is connected with a steam turbine unit, the noise reduction plate is a circular plate, a through hole for steam to circulate is formed in the center of the noise reduction plate, 8 counter bores are uniformly distributed at one end, close to the low-pressure steam pipeline, of the noise reduction plate, the counter bores are distributed around the through hole, nozzles are welded on the counter bores, and are arranged along the steam circulation direction. The high-pressure steam pressure-reducing, temperature-reducing and noise-reducing system reduces the workload of cutting pipelines and reduces the workload of cleaning the pipelines, and can realize the pressure-reducing, temperature-reducing and noise-reducing of the high-pressure steam without damaging the original steam pipeline arrangement.
Description
Technical field:
the invention relates to the field of polyester production, in particular to a high-pressure steam pressure-reducing, temperature-reducing and noise-reducing system.
The background technology is as follows:
the steam generated in the process of the production technology of the refined terephthalic acid (PTA) is supplied to a system heating working medium user, redundant steam is supplied to a steam turbine unit to recover energy for power generation, the normal working temperature of the steam turbine unit is about 145 ℃, under the stopping state of the device, because the preheating boiler cannot generate steam, the high-pressure steam is required to be decompressed to generate low-pressure steam for heating and starting other heating working mediums or turbine units in the device, the temperature of the high-pressure steam is about 305 ℃, the temperature of the decompressed steam is about 185 ℃, the temperature is far higher than the working temperature of the unit, the long-term operation safety of the unit can be influenced, and the starting of the unit is blocked.
Moreover, the steam turbine set has high requirements on the cleanliness of steam, and because the steam flow rate reaches 30-60 m/s, a fine particle can cause damage to turbine blades under a high-speed flow state. To meet this requirement, the steam lines are subjected to acid washing and targeting. If a steam desuperheater is newly added to reduce pressure and temperature, welding a gas cutting rotary hole or cutting by a grinder is needed on the original steam pipeline, and welding slag and powder particles are very likely to fall into the pipeline to pollute the steam pipeline, so that the pollution of the pipeline is reduced, and the cleaning work is quite difficult; and is influenced by the installation space and arrangement of the on-site low-pressure steam pipe network.
The invention comprises the following steps:
the invention aims to solve the technical problems of providing a high-pressure steam depressurization cooling noise reduction system which can reduce the workload of cutting pipelines and the workload of cleaning the pipelines and can realize high-pressure steam depressurization cooling noise reduction without damaging the original steam pipeline arrangement.
The technical scheme is that the high-pressure steam depressurization cooling noise reduction system comprises a boiler island outputting high-pressure steam, the boiler island is connected with an inlet end of a high-pressure steam depressurization valve through a high-pressure steam main pipe, an outlet end of the high-pressure steam depressurization valve is connected with a low-pressure steam pipeline through a noise reduction plate, a pressure controller used for controlling steam pressure of the low-pressure steam pipeline is further arranged on the low-pressure steam pipeline, the low-pressure steam pipeline is connected with a steam turbine unit, the noise reduction plate is a circular plate, a through hole for steam circulation is formed in the center of the noise reduction plate, 8 counter bores are uniformly distributed at one end of the noise reduction plate, the counter bores are distributed around the through hole, nozzles are welded on the counter bores and are arranged along the steam circulation direction, 8 boiler water channels are respectively arranged on side cylindrical surfaces of the noise reduction plate, the inner ends of the boiler water channels are respectively communicated with the counter bores, a hose is connected to the outer end of the boiler water channels, and the high-temperature boiler water conveying pipe is further arranged on the low-pressure steam pipeline.
Compared with the prior art, the invention has the following advantages after the structure is adopted: the high-temperature boiler water conveying pipe is additionally arranged on the basis of the original steam pipeline, the noise reduction plate is improved, the noise reduction orifice plate gap at the downstream of the original pressure reduction valve is utilized, the noise reduction plate is modified into a desuperheater, so that the steam temperature reduction is realized, meanwhile, the effects of noise reduction and pressure reduction of the raw material noise reduction plate are realized, the thermal expansion influence of steam is considered, the expansion quantity is compensated by utilizing a hose, and the hose breakage is avoided; the structure does not damage the original steam pipeline arrangement, reduces the workload of cutting pipelines and reduces the clean workload of the pipelines, and has simple and quick manufacture, installation and operation, can achieve the purposes of reducing noise and reducing temperature, can meet the requirement of reducing the noise of an instrument, can meet the requirement of reducing the temperature of the operating condition of the steam turbine set, and ensures the operation safety of equipment and the instrument; the equipment exchange period is short, and the investment cost is reduced.
Preferably, the low-pressure steam pipeline is further provided with a pressure sensor, the pressure sensor is electrically connected with a pressure controller, and the pressure controller is further electrically connected with a high-pressure steam pressure reducing valve.
Preferably, the low-pressure steam pipeline is provided with a temperature sensor, the temperature sensor is electrically connected with a temperature controller, the high-temperature boiler water conveying pipe is provided with a temperature cut-off valve and a cut-off valve, and the temperature cut-off valve is electrically connected with the temperature controller.
Further, the bore diameter of the counter bore is 200mm, and the temperature of the boiler water is 120 ℃.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of a prior art structure.
Fig. 3 is a schematic view of the noise reduction plate and hose connection.
The specific embodiment is as follows:
the invention is further described with reference to the drawings and detailed description which follow:
as shown in fig. 2, the high-pressure steam depressurization noise reduction system in the process of producing refined terephthalic acid (PTA) comprises a boiler island outputting high-pressure steam, the boiler island is connected with an inlet end of a high-pressure steam depressurization valve 2 through a high-pressure steam main pipe 1 through a flange, an outlet end of the high-pressure steam depressurization valve 2 is connected with a low-pressure steam pipeline 4 through a noise reduction plate 3 in a flange mode, a pressure controller 5 for controlling the steam pressure of the low-pressure steam pipeline is further arranged on the low-pressure steam pipeline 4, the low-pressure steam pipeline 5 is connected with a steam turbine unit 6, specifically, a pressure sensor 7 is further arranged on the low-pressure steam pipeline 4, the pressure sensor 7 is electrically connected with the pressure controller 5, the pressure controller 5 is further electrically connected with the high-pressure steam depressurization valve 2, the pressure sensor detects the steam pressure in the low-pressure steam pipeline in real time and feeds back the pressure value to the pressure controller, the pressure controller adjusts the opening of an opening and closing part of the high-pressure steam depressurization valve according to the fed back pressure value, the noise reduction plate 3 is a circular plate, and in actual production, the high-pressure steam pipeline 1 is connected with a plurality of branch pipes for heat supply equipment or heat supply. In order to reduce the workload of cutting pipelines and the clean workload of pipelines and realize steam cooling on the basis of not damaging the arrangement of the existing steam pipelines, the prior structure is modified on the basis of the prior structure so as to meet the requirements of a steam turbine unit, as shown in figure 1, a high-pressure steam depressurization, temperature and noise reduction system is provided with a through hole 31 for the circulation of steam in the center of a noise reduction plate 3, the thickness of the noise reduction plate 3 is preferably controlled to be 35mm, 8 counter bores are uniformly distributed at one end of the noise reduction plate 3 close to the low-pressure steam pipeline, namely, the counter bores do not penetrate through the two ends of the noise reduction plate, are only formed at one end close to the low-pressure steam pipeline and extend towards the other end, the counter bores are uniformly distributed around the through hole, the aperture of the counter bores is 200mm, a nozzle 32 is welded on the counter bores, the nozzle 32 is arranged along the steam circulation direction, namely, the water spraying direction of the nozzle is consistent with the steam circulation direction, boiler water is mixed with the depressurized steam through the nozzle 32, so as to cool the steam, the temperature of the boiler water is controlled at 120 ℃,8 boiler water flow passages are respectively arranged on the side cylindrical surface of the noise reduction plate 3 corresponding to 8 counter bores, the flow passages are preferably arranged along the diameter direction of the noise reduction plate and extend to the counter bores to be communicated with the counter bores, namely, the inner ends of the boiler water flow passages are respectively communicated with the counter bores, the outer ends of the boiler water flow passages are respectively connected with hoses 33, the hoses 33 are welded at the outer ends of the boiler water flow passages on the side cylindrical surface of the noise reduction plate and are communicated with the boiler water flow passages, the other ends of the hoses are connected with pipes for treatment, for better effect, a gate valve can be arranged on each hose, the high-temperature boiler water pump 8 also comprises a high-temperature boiler water pump 8, the high-temperature boiler water in the high-temperature boiler water pump 8 is communicated with the water outlet of the high-temperature boiler water pump after the other ends of the 8 hoses are connected with the high-temperature boiler water pump, the low-pressure steam pipeline 4 is also provided with a temperature controller 9 for controlling the steam temperature of the low-pressure steam pipeline, in particular, the low-pressure steam pipeline 4 is provided with a temperature sensor 10, the temperature sensor 10 is electrically connected with the temperature controller 9, the high-temperature boiler water conveying pipe 8 is provided with a temperature cut-off valve 11 and a cut-off valve 12, and the temperature cut-off valve 11 is electrically connected with the temperature controller 8. The temperature of the low-pressure steam pipeline is detected in real time through the temperature sensor, the temperature value is fed back to the temperature controller, and the temperature controller controls the opening degree of the temperature cut-off valve to realize the temperature adjustment of the low-pressure steam pipeline so as to meet the temperature requirement of the steam turbine set.
In addition, the low-pressure steam pipeline is also connected with other low-pressure steam devices or pipelines in the process system to provide low-pressure steam for warming up and starting other heat supply working media or turbine units.
In order to achieve the working condition of the steam turbine and ensure the normal operation of the system, and meanwhile, in order to achieve the maximum water and steam mixing, excessive water is prevented from entering a downstream steam pipe network, such as water hammer damage pipeline accessories or liquid drops brought into the turbine due to untimely drainage, so that blades are damaged, and a novel steam desuperheater, namely a novel noise reduction plate structure and a corresponding cooling device, is designed and developed. The high-temperature boiler water conveying pipe is additionally arranged on the basis of the original steam pipeline, the noise reduction plate is improved, the noise reduction orifice plate gap at the downstream of the original pressure reduction valve is utilized, the noise reduction plate is modified into a desuperheater, so that the steam temperature reduction is realized, meanwhile, the effects of noise reduction and pressure reduction of the raw material noise reduction plate are realized, the thermal expansion influence of steam is considered, the expansion quantity is compensated by utilizing a hose, and the hose breakage is avoided; the structure does not damage the original steam pipeline arrangement, reduces the workload of cutting pipelines and reduces the clean workload of the pipelines, and has simple and quick manufacture, installation and operation, can achieve the purposes of reducing noise and reducing temperature, can meet the requirement of reducing the noise of an instrument, can meet the requirement of reducing the temperature of the operating condition of the steam turbine set, and ensures the operation safety of equipment and the instrument; the equipment exchange period is short, and the investment cost is reduced.
The foregoing is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the claims. All equivalent structures or equivalent flow path changes made by the specification and the drawings of the invention are included in the protection scope of the invention.
Claims (1)
1. The utility model provides a high-pressure steam step-down cooling noise reduction system, includes the boiler island of output high-pressure steam, and the boiler island passes through the entrance point of high-pressure steam relief pressure valve of high-pressure steam header pipe connection, and the exit end of high-pressure steam relief pressure valve is connected with low-pressure steam pipeline through the board of making an uproar that falls, still is equipped with the pressure controller that is used for controlling low-pressure steam pipeline steam pressure on the low-pressure steam pipeline, and low-pressure steam pipeline is connected with steam turbine unit, its characterized in that: the noise reduction plate is a circular plate, a through hole for steam circulation is formed in the center of the noise reduction plate, 8 counter bores are uniformly distributed at one end, close to the low-pressure steam pipeline, of the noise reduction plate, the counter bores are distributed around the through hole, nozzles are welded on the counter bores, the nozzles are arranged along the steam circulation direction, 8 boiler water flow passages are respectively arranged on the side cylindrical surfaces of the noise reduction plate, corresponding to the 8 counter bores, the inner ends of the boiler water flow passages are respectively communicated with the counter bores, a hose is connected to the outer end of the boiler water flow passage, the noise reduction plate further comprises a high-temperature boiler water conveying pipe, a water outlet of the high-temperature boiler water conveying pipe is communicated with the hose, a temperature controller for controlling the steam temperature of the low-pressure steam pipeline is further arranged on the low-pressure steam pipeline, the aperture of the counter bores is 200mm, and the temperature of boiler water is 120 ℃;
the counter bores do not penetrate through the two ends of the noise reduction plate, are only arranged near one end of the low-pressure steam pipeline and extend towards the other end; the water spraying direction of the nozzle is consistent with the steam flowing direction, and the boiler water and the depressurized steam are mixed through the nozzle so as to cool the steam;
the boiler water flow passage is arranged along the diameter direction of the noise reduction plate and extends to the counter bore to be communicated with the counter bore;
the other end of the hose is connected with the water outlet of the high-temperature boiler water conveying pipe after being connected with the hose;
the temperature value of the low-pressure steam pipeline is detected in real time through a temperature sensor, and is fed back to a temperature controller, and the temperature controller controls the opening degree of a temperature cut-off valve to realize temperature adjustment of the low-pressure steam pipeline so as to meet the temperature requirement of a steam turbine set;
the low-pressure steam pipeline is also provided with a pressure sensor, the pressure sensor is electrically connected with a pressure controller, and the pressure controller is also electrically connected with a high-pressure steam pressure reducing valve;
the low-pressure steam pipeline is provided with a temperature sensor, the temperature sensor is electrically connected with a temperature controller, the high-temperature boiler water conveying pipe is provided with a temperature cut-off valve and a cut-off valve, and the temperature cut-off valve is electrically connected with the temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812148.3A CN109026229B (en) | 2018-07-23 | 2018-07-23 | High-pressure steam pressure-reducing, temperature-reducing and noise-reducing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812148.3A CN109026229B (en) | 2018-07-23 | 2018-07-23 | High-pressure steam pressure-reducing, temperature-reducing and noise-reducing system |
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| CN109026229A CN109026229A (en) | 2018-12-18 |
| CN109026229B true CN109026229B (en) | 2023-08-29 |
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| CN201810812148.3A Active CN109026229B (en) | 2018-07-23 | 2018-07-23 | High-pressure steam pressure-reducing, temperature-reducing and noise-reducing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110207080A (en) * | 2019-07-12 | 2019-09-06 | 恒力石化（大连）有限公司 | A kind of steam of PTA device is mutually for control system |
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| CN109026229A (en) | 2018-12-18 |
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