CN111396158A - Use method of high-temperature high-pressure steam energy-saving mixing - Google Patents
Use method of high-temperature high-pressure steam energy-saving mixing Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000003303 reheating Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
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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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
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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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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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
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Abstract
The invention discloses a use method of high-temperature high-pressure steam energy-saving mixing, which comprises mixing equipment, wherein the mixing equipment comprises a first adjusting valve, a second adjusting valve, an adjustable actuator, a steam ejector, a pressure transmitter, a temperature transmitter and a steam mixing header; the steam ejector is provided with three connecting ports, the three connecting ports comprise a first connecting port, a second connecting port and an outlet, the first connecting port is connected with a main steam conveying pipe, and the second connecting port is connected with the output end of the steam mixing header. The invention reduces the direct temperature and pressure reduction of high-temperature and high-pressure steam
Loss and cost are saved, cold/hot remixed steam is used as injected gas, the flow of the cold/hot remixed steam is flexibly controlled and adjusted, the outlet temperature of the ejector is ensured to meet the requirements of users, and the problem that the steam ejector does not have a proper low-pressure sucked steam source is fundamentally solved.
Description
Technical Field
The invention relates to the technical field of high-temperature high-pressure steam energy-saving mixing, in particular to a using method of high-temperature high-pressure steam energy-saving mixing.
Background
With the continuous development of national economy of China, industrial heat demand is vigorous, the domestic industrial heat demand accounts for about 70% of the total heat demand, the national industrial heat supply has the phenomena of relatively lagged production process, unreasonable industrial structure and the like, and the unit energy consumption of main industrial products is about 30% higher than the international advanced level on average. In the past, various small boiler heating modes not only waste energy, but also cause serious environmental pollution. The mode of adopting a large unit with high parameters, low coal consumption and low emission to carry out centralized heat supply is an important development direction in the future. With the continuous transformation and upgrading of the industry in China, the demands for heat supply quantity and quality are continuously improved. At present, the demand for industrial steam is more and more diversified, the number of users of medium and high pressure steam is obviously increased, more and more users with the pressure of about 5MPa and the temperature of above 400 ℃ are available, and even industrial steam users with the demand parameters of 10MPa and 500 ℃ are available. Under the large background of advocating environmental protection, energy conservation and emission reduction, how to provide industrial steam with higher pressure and temperature provides new challenges for industrial heating departments.
There are two conventional industrial heating schemes: selecting a certain steam source to match with a temperature and pressure reduction device to obtain steam with required parameters; and (II) taking high-parameter steam as a power steam source, pumping low-pressure steam through a pressure matcher, and mixing to obtain steam with required parameters from an outlet. The drawbacks of conventional heating schemes for current user demand of high parameter steam are:
(1) in order to meet the requirements, high-pressure high-temperature steam such as main steam or 1 extraction steam needs to be selected, and the loss of available energy is large after temperature and pressure reduction, so that the steam consumption cost of a user is increased;
(2) the pressure difference between the front valve and the rear valve of the pressure reducing valve is large, so that the service life of the valve is short;
(3) there is currently no way to find a suitable source of pumped low pressure steam. If only cold re-steam is selected, the problem that the sucked amount is insufficient or the temperature of the mixed steam is low can be faced;
from the above, we have designed a method for using high-temperature high-pressure steam to save energy and mix to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a using method of high-temperature high-pressure steam energy-saving mixing.
In order to achieve the purpose, the invention adopts the following technical scheme:
the use method of the energy-saving mixing of the high-temperature high-pressure steam comprises mixing equipment, wherein the mixing equipment comprises a first adjusting valve, a second adjusting valve, an adjustable actuator, a steam ejector, a pressure transmitter, a temperature transmitter and a steam mixing header;
the steam ejector is provided with three connectors, the three connectors comprise a first connector, a second connector and a discharge port, the first connector is connected with a main steam conveying pipe, the second connector is connected with the output end of a steam mixing header, the discharge port is connected with a steam supply main pipe, a pressure transmitter and a temperature transmitter are sequentially connected onto the steam supply main pipe, the input end of the steam mixing header is connected with a reheat steam cold section and a reheat steam hot section, a first regulating valve is installed on the reheat steam hot section at one end of the steam mixing header, a second regulating valve is installed on the reheat steam cold section at one end of the steam mixing header, a second control unit is installed between the first regulating valve and the temperature transmitter, a temperature reducing water device is connected between the temperature transmitter and the discharge port of the steam ejector, and a first control unit is connected between the pressure transmitter and an adjustable actuator, the first adjusting valve and the second adjusting valve are respectively a hot readjusting valve and a cold readjusting valve.
A method for using high-temperature high-pressure steam in an energy-saving mixing mode comprises the following steps:
s1, injecting cold/hot remixed steam from the steam mixing header by taking the main steam as power steam, and mixing the cold/hot remixed steam through an injector;
s2, in the mixing process of the step S1, when the load of the unit changes, the steam pressure changes, at the moment, the pressure signal of the pressure transmitter at the outlet of the ejector is used as a feedback signal and is transmitted to the first control unit of the ejector, and then the first control unit sends an instruction to adjust the adjustable actuator of the ejector, change the throat flow area of the ejector and change the flow of the ejected steam;
and S3, after the pressure at the outlet of the ejector is stabilized at a value required by a user, enabling the pressure to enter a steam supply main pipe from the outlet of the ejector, using a temperature signal of a transmitter at the outlet as a feedback signal, and adjusting the opening degrees of a first adjusting valve and a second adjusting valve on a reheating steam cold section and a reheating steam hot section through a second control unit to change the heat and cold re-flow of cold/heat re-mixed steam, thereby ensuring that the temperature at the outlet of the ejector is maintained at the required value.
Preferably, the second control unit is a temperature control unit.
Preferably, the temperature control of the heating steam is mainly controlled by a first regulating valve and a second regulating valve together, the temperature reducing device is a standby temperature regulating means, and the outlet of the ejector is in a full-closed state when the temperature is not exceeded.
Preferably, the temperature of the heating steam is regulated by using a cold readjustment valve, and the hot readjustment valve is in a minimum opening degree mode within the valve regulation range of the cold readjustment valve.
Preferably, the heating steam pressure is controlled by a TVC actuator.
Compared with the prior art, the invention has the beneficial effects that:
(1) reducing the direct temperature and pressure reduction of high-temperature and high-pressure steam
And (4) loss.
(2) And a pressure reducing valve with large pressure difference is not arranged, so that the maintenance cost is saved.
(3) The cold/hot remixed steam is used as injected gas, the flow of the cold/hot remixed steam is flexibly controlled and adjusted, the temperature of the outlet of the ejector is ensured to meet the requirements of users, and the problem that the steam ejector does not have a proper low-pressure sucked steam source is fundamentally solved.
Drawings
FIG. 1 is a schematic structural diagram of a method for using high-temperature high-pressure steam energy-saving mixing according to the present invention;
FIG. 2 is a flow chart of the operation of a first control unit, namely a pressure control unit, of the method for using the energy-saving mixture of high-temperature and high-pressure steam according to the present invention;
fig. 3 is a flowchart of a second control unit, namely a temperature control unit, of the energy-saving hybrid application method of high-temperature high-pressure steam according to the present invention.
In the figure: 1 a first adjusting valve, 2 a second adjusting valve, 3 an adjustable actuator, 4 a steam ejector, 5 a pressure transmitter, 6 a temperature transmitter, 7 a steam mixing header, 8 a first control unit, 9 a second control unit, 10 a desuperheater device and 11 a desuperheating water adjusting valve.
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.
Referring to fig. 1-3, a method for using high-temperature and high-pressure steam energy-saving mixing comprises mixing equipment, wherein the mixing equipment comprises a first adjusting valve 1, a second adjusting valve 2, an adjustable actuator 3, a steam ejector 4, a pressure transmitter 5, a temperature transmitter 6 and a steam mixing header 7;
the steam ejector 4 is provided with three connectors, the three connectors comprise a first connector, a second connector and a discharge port, the first connector is connected with a main steam conveying pipe, the second connector is connected with the output end of a steam mixing header 7, the discharge port is connected with a steam supply main pipe, the steam supply main pipe is sequentially connected with a pressure transmitter 5 and a temperature transmitter 6, the input end of the steam mixing header 7 is connected with a reheat steam cold section and a reheat steam hot section, a first regulating valve 1 is arranged on the reheat steam hot section at one end of the steam mixing header 7, a second regulating valve 2 is arranged on the reheat steam cold section at one end of the steam mixing header 7, a second control unit 9 is arranged between the first regulating valve 1 and the second regulating valve 2 and the temperature transmitter 6, a temperature reducing water device 10 is connected between the temperature transmitter 6 and the discharge port of the steam ejector 4, and a first control unit 8 is connected between the pressure transmitter 5 and an adjustable actuator 3, the first and second trim valves 1 and 2 are hot and cold trim valves, respectively.
Example one
A method for using high-temperature high-pressure steam in an energy-saving mixing mode comprises the following steps:
s1, injecting cold/hot remixed steam from the steam mixing header 7 by taking main steam as power steam, and mixing the cold/hot remixed steam through the ejector 4;
s2, in the mixing process of the step S1, when the load of the unit changes, the steam pressure changes, at the moment, the pressure signal of the pressure transmitter 5 at the outlet of the ejector 4 is used as a feedback signal and is transmitted to the first control unit 8 of the ejector 4, and then the first control unit 8 sends an instruction to adjust the adjustable actuator 3 of the ejector 4, change the throat flow area of the ejector 4 and change the flow of the ejected steam; thereby ensuring that the pressure at the outlet of the injector 4 is stabilized at the user-requested value;
s3, after the pressure at the outlet of the ejector 4 is stabilized at the value required by the user, the pressure enters a steam supply main pipe from the outlet of the ejector 4, the temperature signal of the transmitter 6 at the outlet is used as a feedback signal, and the opening degrees of the first regulating valve 1 and the second regulating valve 2 on the cold section and the hot section of the reheat steam are adjusted through the second control unit 9, wherein:
when the steam temperature rises, the temperature transmitter 6 at the outlet of the ejector 4 transmits a temperature signal to the second control unit 9, then the second control unit 9 sends an instruction, firstly, the opening of the regulating valve 2 on the pipeline of the cold section of the reheat steam is opened to increase the flow of the cold reheat steam, and then, the opening of the regulating valve 1 on the pipeline of the hot section of the reheat steam is closed to increase the cold reheat flow of the cold/hot reheat mixed steam, reduce the hot reheat flow and ensure that the outlet temperature of the ejector 4 is maintained at a required value;
when the steam temperature is reduced, the temperature transmitter 6 at the outlet of the ejector 4 transmits a temperature signal to the second control unit 9, then the second control unit 9 sends an instruction, firstly, the opening of the regulating valve 1 on the pipeline of the hot section of the reheat steam is opened to increase the flow of the hot reheat steam, and then, the opening of the regulating valve 2 on the pipeline of the cold section of the reheat steam is closed to increase the hot reheat flow in the cold/hot reheat mixed steam, reduce the cold reheat flow and ensure that the outlet temperature of the ejector 4 is maintained at a required value;
the steam quantities of the reheating steam cold section and the reheating steam hot section which enter the steam mixing header 7 are respectively regulated through the first regulating valve 1 and the second regulating valve 2, so that the steam temperature in the steam mixing header 7 can be regulated, and the temperature of the mixed steam at the outlet of the steam ejector 4 is changed;
specifically, the second control unit 9 is a temperature control unit, the temperature control of the heating steam is mainly controlled by the first regulating valve 1 and the second regulating valve 2 together, the temperature reducing water device 10 is a standby temperature regulating means, and the outlet of the ejector 4 is in a full-closed state when the temperature is not over-heated;
in step S3, when the second control unit 9 adjusts the opening degrees of the first and second control valves 1 and 2 in the reheat steam cold stage and the reheat steam hot stage, if the control valve 2 in the cold reheat pipeline has been opened to the maximum opening degree, the control valve 1 in the hot reheat pipeline has been closed to the minimum, and the outlet of the ejector is still over-heated, at this time, a desuperheating water device at the outlet of the ejector is put into the reheat steam hot stage, and the steam temperature is reduced to a required value;
specifically, the first regulating valve 1 and the second regulating valve 2 are respectively a hot readjusting valve and a cold readjusting valve, preferably, the cold readjusting valve is used for regulating the temperature of the heating steam, and the hot readjusting valve adopts a minimum opening degree mode within the valve regulating range of the cold readjusting valve; the heating steam pressure is controlled by a TVC actuating mechanism;
the steam injector can adjust the steam inlet flow to inject the reheated steam, and high-temperature and high-pressure industrial steam meeting the requirements is formed at the outlet of the steam injector.
Among these, two important parameters of the steam ejector: injection coefficient and compression ratio
Calculating the injection coefficient according to formula 1
Mu-ejection coefficient;
GT-motive steam flow;
GS-the injected steam flow;
calculating the compression ratio, see equation 2
Y-compression ratio, i.e., the ratio of injector discharge pressure to suction pressure;
PK-ejector exhaust pressure;
PS-ejector suction pressure;
CpS-the specific heat capacity at constant pressure of the gas to be evacuated;
CpT-the constant pressure specific heat capacity of the motive steam;
CνS-the specific heat capacity at constant pressure of the gas to be evacuated;
CνT-the constant pressure specific heat capacity of the motive steam;
wherein the isentropic conversion speed is referred to formula 4
Va-the velocity of the mixed gas entering the mixing chamber;
V*-critical velocity of mixed gas.
In calculating available energy
In the variation of the value, equation 5 is followed:
Exq-a system
(ii) a change;
q-heat given off by the system;
Anq-a system change;
T0-ambient temperature;
t is the system temperature.
ηdFor energy efficiency, reflecting the energy loss condition of gas in the process of converting kinetic energy and pressure energy when the gas flows, and following the formula 6;
EXTof ejector-powered steam
A value;
EXSthe ejector drawing steam
A value;
EXK-ejector exhaust
A value;
example analysis: the minimum steam load of a certain power plant design is 61.5t/h, the steam parameters required by a user are 5MPa and 450 ℃, and the rated parameters of main steam are 24.2MPa and 566 ℃. The yield ratio of the scheme of directly using the conventional main steam temperature and pressure reduction steam supply scheme and the scheme of using a steam ejector to inject cold/hot remixed steam is as follows:
the scheme comparison shows that the system uses the main steam to inject the cold/hot remixed steam, so that
The value loss is greatly reduced;
(1) reducing the direct temperature and pressure reduction of high-temperature and high-pressure steam
And (4) loss.
(2) And a pressure reducing valve with large pressure difference is not arranged, so that the maintenance cost is saved.
(3) The cold/hot remixed steam is used as injected gas, the flow of the cold/hot remixed steam is flexibly controlled and adjusted, the temperature of the outlet of the ejector is ensured to meet the requirements of users, and the problem that the steam ejector does not have a proper low-pressure sucked steam source is fundamentally solved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The use method of the high-temperature high-pressure steam energy-saving mixing comprises mixing equipment, and is characterized in that the mixing equipment comprises a first adjusting valve (1), a second adjusting valve (2), an adjustable actuator (3), a steam ejector (4), a pressure transmitter (5), a temperature transmitter (6) and a steam mixing header (7);
the steam ejector (4) is provided with three connectors, three the connectors comprise a first connector, a second connector and a discharge port, the first connector is connected with a main steam conveying pipe, the second connector is connected with the output end of a steam mixing header (7), the discharge port is connected with a steam supply main pipe, a pressure transmitter (5) and a temperature transmitter (6) are sequentially connected onto the steam supply main pipe, the input end of the steam mixing header (7) is connected with a reheat steam cold section and a reheat steam hot section, a first adjusting valve (1) is installed on the reheat steam hot section at one end of the steam mixing header (7), a second adjusting valve (2) is installed on the reheat steam cold section at one end of the steam mixing header (7), and a second control unit (9) is installed between the first adjusting valve (1) and the second adjusting valve (2) and the temperature transmitter (6), be connected with between the discharge port of temperature transmitter (6) and steam jet ejector (4) desuperheating water installation (10), be connected with first control unit (8) between pressure transmitter (5) and adjustable executor (3), first accent valve (1) and second accent valve (2) are hot readjustment valve and cold readjustment valve respectively.
2. The use method of the energy-saving mixing of the high-temperature high-pressure steam is characterized by comprising the following steps of:
s1, injecting cold/hot remixed steam from the steam mixing header 7 by taking main steam as power steam, and mixing the cold/hot remixed steam through the ejector 4;
s2, in the mixing process of the step S1, when the load of the unit changes, the steam pressure changes, at the moment, the pressure signal of the pressure transmitter (5) at the outlet of the ejector (4) is used as a feedback signal and is transmitted to the first control unit (8) of the ejector (4), and then the first control unit (8) sends out an instruction to adjust the adjustable actuator (3) of the ejector (4), so that the flow area of the throat of the ejector (4) is changed, and the flow of the ejected steam is changed;
and S3, after the pressure at the outlet of the ejector (4) is stabilized at a value required by a user, the pressure enters a steam supply main pipe from the outlet of the ejector (4), the temperature signal of a transmitter (6) at the outlet is used as a feedback signal, and the opening degrees of a first regulating valve (1) and a second regulating valve (2) on a reheating steam cold section and a reheating steam hot section are regulated through a second control unit (9), so that the hot and cold re-flow rates in cold/hot re-mixed steam are changed, and the temperature at the outlet of the ejector (4) is ensured to be maintained at the required value.
3. The method for using the high-temperature high-pressure steam energy-saving mixture as claimed in claim 1, characterized in that the second control unit (9) is a temperature control unit.
4. The method for using the high-temperature high-pressure steam energy-saving mixture as claimed in claim 1, characterized in that the temperature control of the heating steam is mainly controlled by a first regulating valve (1) and a second regulating valve (2) together, the desuperheating water device (10) is a standby temperature regulating means, and the outlet of the ejector (4) is in a full-closed state when the temperature is not over-increased.
5. The method for using high-temperature high-pressure steam energy-saving mixing in claim 1 is characterized in that the temperature of the heating steam is preferably adjusted by using a cold readjustment valve, and the hot readjustment valve adopts a minimum opening mode within the valve adjusting range of the cold readjustment valve.
6. The method as claimed in claim 1, wherein the steam pressure of the heating steam is controlled by a TVC actuator.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4595344A (en) * | 1982-09-30 | 1986-06-17 | Briley Patrick B | Ejector and method of controlling same |
| CN1350630A (en) * | 2000-01-14 | 2002-05-22 | Tlv有限公司 | Steam heating device |
| CN201259213Y (en) * | 2008-08-14 | 2009-06-17 | 天壕节能科技有限公司 | Attemperation system for adjusting temperature of superheated vapour |
| CN105909568A (en) * | 2016-05-16 | 2016-08-31 | 长沙湘资生物科技有限公司 | High and intermediate pressure industrial steam supply system of hot press unit and adjustment method |
| CN107401739A (en) * | 2016-05-19 | 2017-11-28 | 华电电力科学研究院 | Intelligent pressure and temperature reducing energy-saving control system |
| CN109653820A (en) * | 2019-01-22 | 2019-04-19 | 林文华 | A kind of high pressure industrial steam supply system and control method |
| CN110486737A (en) * | 2019-08-02 | 2019-11-22 | 上海舟虹电力工程技术中心 | A kind of intelligence adjusts the transformation device and method of the new vapour source of boiler lifting |
-
2020
- 2020-03-05 CN CN202010148353.1A patent/CN111396158A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4595344A (en) * | 1982-09-30 | 1986-06-17 | Briley Patrick B | Ejector and method of controlling same |
| CN1350630A (en) * | 2000-01-14 | 2002-05-22 | Tlv有限公司 | Steam heating device |
| CN201259213Y (en) * | 2008-08-14 | 2009-06-17 | 天壕节能科技有限公司 | Attemperation system for adjusting temperature of superheated vapour |
| CN105909568A (en) * | 2016-05-16 | 2016-08-31 | 长沙湘资生物科技有限公司 | High and intermediate pressure industrial steam supply system of hot press unit and adjustment method |
| CN107401739A (en) * | 2016-05-19 | 2017-11-28 | 华电电力科学研究院 | Intelligent pressure and temperature reducing energy-saving control system |
| CN109653820A (en) * | 2019-01-22 | 2019-04-19 | 林文华 | A kind of high pressure industrial steam supply system and control method |
| CN110486737A (en) * | 2019-08-02 | 2019-11-22 | 上海舟虹电力工程技术中心 | A kind of intelligence adjusts the transformation device and method of the new vapour source of boiler lifting |
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