CN110553147A - superheated steam cooling and pressure reducing system and method - Google Patents
superheated steam cooling and pressure reducing system and method Download PDFInfo
- Publication number
- CN110553147A CN110553147A CN201810539292.4A CN201810539292A CN110553147A CN 110553147 A CN110553147 A CN 110553147A CN 201810539292 A CN201810539292 A CN 201810539292A CN 110553147 A CN110553147 A CN 110553147A
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- CN
- China
- Prior art keywords
- conveying pipeline
- superheated steam
- pressure
- softened water
- gas
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/06—Pipe-line systems for gases or vapours for steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
Abstract
The invention relates to an overheated steam cooling and pressure reducing system and method, the system comprises an overheated steam conveying pipeline, a venturi, a softened water conveying pipeline and a gas-liquid separator, the venturi is provided with a contraction inlet end, a throat section and an outlet end which are sequentially connected, the overheated steam conveying pipeline is connected with the contraction inlet end of the venturi, the softened water conveying pipeline is communicated with the throat section, the gas-liquid separator is connected with the outlet end, softened water is sucked and mixed through negative pressure generated by a venturi, the purpose of cooling overheated steam is achieved, a high-pressure water pump is avoided being installed, the operation is easy, and the control is convenient.
Description
Technical Field
The invention relates to a superheated steam cooling and pressure reducing system and method.
background
At present, the steam delivery of industrial enterprises generally adopts the high-temperature high-pressure state delivery, and the use of steam generally uses low-temperature saturated steam, so the end of use often needs to be decompressed, and the temperature of the decompressed steam is not reduced, so that the steam is superheated. The traditional steam pressure reduction system needs to be provided with a high-pressure water pump, reduces the steam temperature in a spraying mode, but has the following defects: 1. the pressure of the high-pressure water pump is higher than the pressure of superheated steam, and the energy consumption is high. 2. When the saturated steam is used, the high-pressure water pump is started, when the steam is not used temporarily, the high-pressure water pump needs to be closed, and when the high-pressure water pump is used and then started again, the high-pressure water pump needs to be restarted, so that the time consumption is long, and the efficiency is low. 3. The steam temperature is not easy to control by system regulation, and the operation is complicated.
In view of the above, there is a need for a system for reducing temperature and pressure of superheated steam.
Disclosure of Invention
the invention aims to provide a superheated steam temperature and pressure reducing system and a superheated steam temperature and pressure reducing method which are simple to control and easy to operate.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
The invention provides an superheated steam cooling and pressure reducing system which comprises a superheated steam conveying pipeline, a venturi, a softened water conveying pipeline and a gas-liquid separator, wherein the venturi is provided with a contraction inlet end, a throat section and an outlet end which are sequentially connected, the superheated steam conveying pipeline is connected with the contraction inlet end of the venturi, the softened water conveying pipeline is communicated with the throat section, and the gas-liquid separator is connected with the outlet end.
Furthermore, a self-operated pressure reducing and stabilizing valve is arranged on the steam delivery pipeline.
furthermore, an automatic regulating valve is arranged on the softened water conveying pipeline, and a temperature sensor is arranged in the gas-liquid separator.
in another aspect of the present invention, a method for reducing temperature and pressure of superheated steam by using the above system is provided, which includes the following steps:
s1, enabling superheated steam to enter a venturi through a superheated steam conveying pipeline;
S2, after the gas passes through the contraction part of the venturi, negative pressure is formed at the throat section of the venturi;
S3, the softened water enters the throat section of the venturi through a softened water conveying pipeline under the action of negative pressure;
And S4, mixing softened water and superheated steam in the venturi, then entering a gas-liquid separator from an outlet end, carrying out gas-liquid separation, and outputting saturated steam.
Further, in step S4, a temperature sensor is disposed in the gas-liquid separator to monitor the temperature at any time.
Further, in step S3, the softened water delivery pipe is provided with an automatic regulating valve for regulating the opening according to the temperature of the temperature sensor to control the suction amount of the softened water.
Further, in step S1, a self-operated pressure reducing and stabilizing valve is disposed on the steam delivery pipe for pressure reduction and pressure stabilization.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
The system and the method provided by the invention can suck and mix the softened water through the negative pressure generated by the venturi tube, thereby achieving the purpose of reducing the temperature of the superheated steam and avoiding installing a high-pressure water pump.
The invention adjusts the opening of the automatic regulating valve and regulates the water quantity of the sucked water through the auxiliary temperature control system, can reduce the temperature of the superheated steam to the proper temperature meeting the requirement, and has easy temperature control and simple operation.
The system and the method provided by the invention have the advantages of wide adaptability, no limitation to the size of production scale, high working efficiency and low energy consumption, and can quickly convert superheated steam into saturated steam.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a system provided by the present invention;
FIG. 2 is a block flow diagram of a method provided by the invention;
In the drawings: 1 superheated steam conveying pipeline, 2 venturi tubes, 21 contracted inlet ends, 22 throat sections, 3 softened water conveying pipelines, 4 gas-liquid separators, 5 self-operated pressure reducing and stabilizing valves and 6 automatic regulating valves.
Detailed Description
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail and fully with reference to the following embodiments.
The superheated steam cooling and pressure reducing system shown in the attached drawing 1 comprises a superheated steam conveying pipeline 1, a venturi 2, a softened water conveying pipeline 3 and a gas-liquid separator 4, wherein the venturi 2 is provided with a contraction inlet end 21, a throat section 22 and an outlet end which are sequentially connected, the superheated steam conveying pipeline 1 is connected with the contraction inlet end 21 of the venturi 2, the softened water conveying pipeline 3 is communicated with the throat section 22, the gas-liquid separator 4 is connected with the outlet end, the superheated steam and the softened water are mixed in the venturi and then are separated by the gas-liquid separator, and saturated steam is obtained.
the steam conveying pipeline 1 is provided with a self-operated pressure reducing and stabilizing valve 5, so that the steam input into the venturi 2 is subjected to pressure reduction and pressure stabilization. An automatic regulating valve 6 is arranged on the softened water conveying pipeline 3, a temperature sensor is arranged in the gas-liquid separator 4, the opening degree of the automatic regulating valve is regulated by receiving a temperature signal contacted by the temperature sensor, the water quantity of the sucked water is controlled, and the superheated steam is cooled to a proper temperature.
As a specific implementation of the invention, the temperature control adopts a multifunctional temperature input controller, such as mt602 series, and a pid control unit carried by the controller is adopted to control the automatic regulating valve and control the water quantity.
The method for reducing the temperature and the pressure of the superheated steam by using the system comprises the following steps:
S1, enabling superheated steam to pass through a superheated steam conveying pipeline 1, pass through a self-operated pressure reducing and stabilizing valve 5 and then enter a venturi 2;
s2, after the gas passes through the contraction part of the venturi tube 2, negative pressure is formed at the throat section 22 of the venturi tube 2;
S3, under the action of negative pressure, softened water enters the throat section of the venturi tube 2 through the softened water conveying pipeline 3 and the automatic regulating valve 6;
And S4, mixing softened water and superheated steam in the venturi 2, then entering a gas-liquid separator 4 from an outlet end 23, carrying out gas-liquid separation, and outputting saturated steam. The gas-liquid separator 4 is provided with a temperature sensor for constantly monitoring the temperature, and the temperature signal is transmitted to the automatic regulating valve 6 of step S3 to regulate the opening degree, thereby controlling the amount of water entering the venturi tube.
The principle of the invention is as follows:
According to the Venturi effect of the Venturi tube, when superheated steam passes through the contraction part, the air pressure of the throat section is low, adsorption is generated, softened water is sucked in, the softened water is contacted with the superheated steam, and after the temperature is reduced, the saturated steam is obtained through separation of a gas-liquid separator.
the temperature control of the saturated steam is realized based on the following method: after softened water and superheated steam enter the venturi, the softened water and the superheated steam contact a temperature sensor arranged in the venturi, the temperature sensor converts the detected temperature into a signal and transmits the signal to an automatic regulating valve, and the automatic regulating valve regulates the opening according to the temperature signal, controls the water quantity of sucked water and realizes the temperature control of mixed gas and liquid.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The superheated steam cooling and pressure reducing system is characterized by comprising a venturi structure (1), a softened water conveying pipeline (2) and a gas-liquid separator (3) which are used in a superheated steam conveying pipeline, wherein the conveying pipeline venturi structure (1) is provided with a contraction inlet end (21), a throat section (22) and an outlet end (23) which are sequentially connected, the contraction inlet end (21) of the superheated steam conveying pipeline venturi structure (1), the softened water conveying pipeline (3) is communicated with the throat section (22) of the venturi conveying structure, and the gas-liquid separator (4) is connected with the outlet end (23).
2. a superheated steam temperature-reducing and pressure-reducing system as claimed in claim 1, wherein the steam delivery pipeline (1) is provided with a self-operated pressure-reducing and pressure-stabilizing valve (5).
3. the superheated steam cooling and pressure reducing system according to claim 1, wherein the softened water delivery pipe (3) is provided with an automatic regulating valve (6), and the gas-liquid separator (4) is provided with a temperature sensor.
4. A method for reducing temperature and pressure of superheated steam by using the system of claim 1, comprising the steps of:
S1, passing superheated steam through a conveying pipeline (1) with a venturi structure;
S2, after the gas passes through a contraction part of the conveying pipeline (1) with the Venturi structure, negative pressure is formed in a throat section (22) of the steam pipeline (2);
S3, under the action of negative pressure, softened water enters the throat section of the conveying pipeline (1) with the venturi structure through the softened water conveying pipeline (3);
and S4, mixing softened water and superheated steam in the conveying pipeline (1) with the venturi structure, then entering a gas-liquid separator (4) from an outlet end, performing gas-liquid separation, and outputting saturated steam.
5. a method according to claim 4, characterized in that in step S4, a temperature sensor is arranged in the gas-liquid separator (4) for monitoring and controlling the temperature at any time.
6. A method according to claim 5, characterized in that in step S2, the softened water delivery pipe (3) is provided with an automatic regulating valve (6) for controlling the suction amount of the softened water by regulating the opening degree according to the temperature of the temperature sensor.
7. A method according to claim 4, characterized in that in step S1, a self-operated pressure reducing and stabilizing valve (5) is arranged on the steam delivery pipeline (1) for reducing and stabilizing pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810539292.4A CN110553147A (en) | 2018-05-30 | 2018-05-30 | superheated steam cooling and pressure reducing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810539292.4A CN110553147A (en) | 2018-05-30 | 2018-05-30 | superheated steam cooling and pressure reducing system and method |
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| Publication Number | Publication Date |
|---|---|
| CN110553147A true CN110553147A (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810539292.4A Pending CN110553147A (en) | 2018-05-30 | 2018-05-30 | superheated steam cooling and pressure reducing system and method |
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| CN (1) | CN110553147A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174019A (en) * | 2019-12-31 | 2020-05-19 | 浙江大学 | Device and method for cooperatively adjusting steam pressure and temperature |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU992902A1 (en) * | 1981-09-29 | 1983-01-30 | Производственное Ордена Ленина Объединение "Красный Котельщик" | Apparatus for controlling steam temperature |
| CN201463059U (en) * | 2009-08-07 | 2010-05-12 | 北京京诚科林环保科技有限公司 | Steam saturated system |
| CN102183006A (en) * | 2010-12-28 | 2011-09-14 | 杭州华惠阀门有限公司 | High-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly |
| CN102434781A (en) * | 2011-12-02 | 2012-05-02 | 杭州华惠阀门有限公司 | Temperature-reducing and pressure-reducing system |
| CN105526579A (en) * | 2014-09-28 | 2016-04-27 | 付开领 | Venturi desuperheater |
| CN205979183U (en) * | 2016-07-22 | 2017-02-22 | 天津市川宏仪表系统科技有限公司 | Integral type interface control's superheated steam temperature and pressure reduction 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 |
-
2018
- 2018-05-30 CN CN201810539292.4A patent/CN110553147A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU992902A1 (en) * | 1981-09-29 | 1983-01-30 | Производственное Ордена Ленина Объединение "Красный Котельщик" | Apparatus for controlling steam temperature |
| CN201463059U (en) * | 2009-08-07 | 2010-05-12 | 北京京诚科林环保科技有限公司 | Steam saturated system |
| CN102183006A (en) * | 2010-12-28 | 2011-09-14 | 杭州华惠阀门有限公司 | High-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly |
| CN102434781A (en) * | 2011-12-02 | 2012-05-02 | 杭州华惠阀门有限公司 | Temperature-reducing and pressure-reducing system |
| CN105526579A (en) * | 2014-09-28 | 2016-04-27 | 付开领 | Venturi desuperheater |
| CN205979183U (en) * | 2016-07-22 | 2017-02-22 | 天津市川宏仪表系统科技有限公司 | Integral type interface control's superheated steam temperature and pressure reduction 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174019A (en) * | 2019-12-31 | 2020-05-19 | 浙江大学 | Device and method for cooperatively adjusting steam pressure and temperature |
| CN111174019B (en) * | 2019-12-31 | 2021-10-08 | 浙江大学 | Device and method for cooperatively adjusting steam pressure and temperature |
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Application publication date: 20191210 |
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| RJ01 | Rejection of invention patent application after publication |