CN102003419A - Steam ejector composite set - Google Patents
Steam ejector composite set Download PDFInfo
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- CN102003419A CN102003419A CN 201010513159 CN201010513159A CN102003419A CN 102003419 A CN102003419 A CN 102003419A CN 201010513159 CN201010513159 CN 201010513159 CN 201010513159 A CN201010513159 A CN 201010513159A CN 102003419 A CN102003419 A CN 102003419A
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Abstract
The invention provides a steam ejector composite set which is characterized in that a high-pressure inlet end A and a high-pressure outlet end B of the traditional steam ejector are respectively connected with different steam storage tanks; one steam ejector can be connected between two steam storage tanks, and multiple steam ejectors can be also connected in parallel or in series between the two steam storage tanks; a bypass can be also connected between the two steam storage tanks; and the bypass can be provided with a regulating valve or a reducing valve. The steam storage tanks can be pure storage tanks and can be also phase change type steam heat accumulators. The composite set can make the steam ejector still stably work under the condition of bigger fluctuation of load.
Description
Technical field
The invention belongs to the heat power engineering field, be specifically related to the surplus vapour suction of the low parameter pressure build-up technique of vapour system.
Background technique
At present, in the vapour system in field such as industrial, civilian, steam can produce a part of low pressure steam through after the surface-type heat exchanger, some specific manufacturing processs also can produce a part of low pressure steam, these steam generally all can not satisfy technological requirement because pressure is low, can not directly use, often be disposed to atmosphere or drained, cause the loss of energy and the thermo-pollution of environment with water of condensation.At the Steam Recovery utilization of low-pressure parameter, have a lot of methods in the industry at present, for example energy cascade utilization method, open type enclosed heated feed water method, compressor compresses method, steam jet ejector (heat pump) draw gas and utilize method etc.Facts have proved: the steam that adopts steam jet ejector to reclaim the low pressure parameter has more significant effect comparatively speaking.
Common steam jet ejector (heat pump) draws low pressure raise steam be the scheme of the higher steam of pressure referring to Fig. 1, the high pressure steam that is produced by thermal source (mainly by boiler, waste heat boiler etc.) is with certain pressure P
1And flow G
1Enter in the steam jet ejector 1.Live steam improves steam flow rate through the Rafael nozzle in the steam jet ejector 1, and this moment, pressure was reduced to P
2(be lower than by the steam pumping pressure P
0), thereby have certain draft, draws low pressure steam.Though this part steam pressure P
0On the low side, be difficult to direct utilization, but, mix current-sharing earlier, and then diffusion boost to the required pressure P of technology through the diffuser pipe in the steam jet ejector 1
L, can offer the process steam equipment utilization.Said apparatus since with the high pressure live steam as Driving force, if high pressure initial steam pressure P
1, working pressure P
L, flow G
1Stable, then system works is also very stable.
Usually, steam jet ejector inside mainly is made up of the two large divisions: one, be the Rafael nozzle that high pressure steam passes through, its inner critical section (being the section of flow velocity c=a velocity of sound) that exists in the flow process, and corresponding critical flow G
1Two, be diffuser pipe, its import is the low-voltage high speed fluid, and reduction of speed boosts in the flow process, and outlet pressure reaches the pressure P of technological requirement
LIn order to realize said process, also require to form one corresponding to pressure P in diffuser pipe inside
LCritical flow G
L
Be lower than the design work pressure P of steam jet ejector steam inlet A when the pressure of high pressure live steam
1During certain value, the steam flow rate of Rafael nozzle inside will not reach velocity of sound, and critical section can't form; If the flow of high pressure live steam is lower than steam jet ejector design discharge G
1During certain value, critical section also can't form, and these two kinds of operating modes all will make steam jet ejector lose efficacy, and Rafael nozzle will become the flow field of Venturi tube, and the pressure of steam jet ejector pump port C will be higher than by the steam pumping pressure P
0, high pressure steam will pour in down a chimney to low pressure steam line.If the steam line pressure that diffuser pipe outlet B connects produces fluctuation, when the manufacturing equipment steam consumption diminishes suddenly, steam line pressure is higher than the design work pressure P of diffuser pipe outlet B
LThe time, steam line inner high voltage steam will instead pour in the diffuser pipe, cause steam jet ejector to lose efficacy, and can't form the needed draft of draws low pressure steam; Become big when the manufacturing equipment steam consumption is unexpected, steam line pressure is lower than the design work pressure P of diffuser pipe outlet B
LThe time, because steam jet ejector steam supply flow is more constant, can't satisfy the demand that the manufacturing equipment steam consumption increases suddenly, will influence normal process production.
By above-mentioned analysis as seen: the operating range of steam jet ejector (heat pump) only allows to work in less vapor pressure/changes in flow rate scope, and situation about changing greatly for steam load then can't adapt to.And the often fluctuation in a big way of its load of the vapour system of using in a large number, this has just limited the application of steam jet ejector.For this reason, solving steam jet ejector becomes the subject matter of assurance steam jet ejector proper functioning to the problem of steam load fluctuation bad adaptability, by pressure and the flow of stablizing steam inlet pipeline and outlet conduit, can solve the influence of the pressure/flowed fluctuation in short-term of steam line to a certain extent to the steam jet ejector proper functioning.
Summary of the invention
The present invention is the improvement that the common steam sparger is carried out.The characteristics of common steam jet ejector are that steam inlet A directly connects by the next high pressure steam pipeline of thermal source, pump port C connects low pressure steam, steam ouput B directly connects with steam pipe road (referring to Fig. 1), and such structure makes steam jet ejector be easy to be subjected to the high pressure steam pipeline and with the influence of steam pipe road vapor pressure/flowed fluctuation to its proper functioning.Purpose of the present invention just is the deficiency that exists at prior art to propose a kind of steam jet ejector composite set, make steam jet ejector can be under the big fluctuation of load situation of short-term stable operation.
The technological scheme that the present invention proposes is as follows:
1, adopt steam storage tank or phase-transformation type steam accumulator to adapt to the vapour system fluctuation of load
According to the load variations characteristics of different vapour systems and the characteristics of pressure parameter, on the contact pipeline of steam ports, steam storage tank or phase-transformation type steam accumulator (referring to Fig. 2) are set respectively at steam jet ejector.Steam storage tank and phase-transformation type steam accumulator possess the characteristics of stable vapor pressure/traffic load, when steam jet ejector enters the mouth the high pressure steam pipe network because of boiler pressure of steam supply/flowed fluctuation, perhaps the steam supply pipe network connect equipment steam consumption quantity fluctuation in short-term the time, steam storage tank (or phase-transformation type steam accumulator) still can be steam jet ejector stable steam supply parameter is provided, and makes the steam jet ejector working stability; When the equipment steam consumption quantity fluctuation in short-term that steam jet ejector outlet steam pipe system connects, the manufacturing equipment that steam storage tank (or phase-transformation type steam accumulator) still can be the steam jet ejector steam supply provides stable vapor pressure/flow, guarantees ordinary production.
2, in parallel or series connection of steam jet ejector and the composite set that cooperates with bypass:
Use the vapour demand for what satisfy the manufacturing equipment proper functioning, the present invention takes the setting that many steam jet ejectors are in parallel or connect, also can increase the bypass in parallel of band modulating valve (or reduction valve) simultaneously at the steam jet ejector pipeline, the core that composite set is regulated is control outlet pressure P
LStable, the steam flow of the steam jet ejector of flowing through is remained in the scope of design, steam jet ejector also can proper functioning under loading than the situation of great fluctuation process with vapour.
Description of drawings
The steam jet ejector low pressure steam recovering device system diagram that Fig. 1 is traditional.
The steam jet ejector composite set system diagram of Fig. 2 carrying vapour storage tank or phase-transformation type steam accumulator.
The steam jet ejector composite set system diagram of Fig. 3 band bypass.
Bypass of Fig. 4 band and steam jet ejector composite set system diagram in parallel or series connection.
Among the figure: 1, steam jet ejector, 21, high pressure steam storage tank or phase-transformation type steam accumulator, 22, medium pressure steam storage tank or phase-transformation type steam accumulator, 3, the bypass of band modulating valve or reduction valve, 4, electronic or pneumatic control valve.
Symbol among the figure sees the following form:
Embodiment
In conjunction with the accompanying drawings, describe the concrete structure and the working procedure of this device in detail:
1, the steam jet ejector composite set of carrying vapour storage tank or phase-transformation type steam accumulator
Referring to Fig. 2, this device comprises high pressure steam storage tank or phase-transformation type steam accumulator 21, steam jet ejector 1, medium pressure steam storage tank or the phase-transformation type steam accumulator 22 that connects by pipeline successively.Wherein be connected in the high pressure steam storage tank on the steam inlet A of steam jet ejector 1 or the import of phase-transformation type steam accumulator 21 and connect the high pressure steam pipeline, the outlet that is connected in medium pressure steam storage tank on the steam supply mouth B of steam jet ejector 1 or phase-transformation type steam accumulator 22 is connected to manufacturing equipment and uses the steam pipe road.This device and pipeline can be as required at steam jet ejector steam inlet A, steam ouput B and extraction opening C place setting pressure table, thermometer, flowmeter etc.The working procedure of said apparatus is as follows: live steam enters steam jet ejector 1 back step-down draws low pressure steam, and diffusion to process steam pressure is conducted to gas utilization unit again.
2, the steam jet ejector composite set system diagram of band bypass
Referring to Fig. 3, this device is the steam jet ejector composite set that has steam storage tank or phase-transformation type steam accumulator based on above-mentioned, increase by one tunnel band modulating valve in parallel or the bypass 3 of reduction valve, before the steam inlet A of steam jet ejector 1, be installed in series electronic or pneumatic control valve 4 simultaneously with steam jet ejector.
The working principle of this composite set is, the bypass 3 of robot control system(RCS) control band modulating valve or reduction valve, and the electronic or pneumatic control valve 4 of steam jet ejector pipeline import series connection, the vapor stream that keeps normal duty is through steam jet ejector, if equipment uses the vapor stream quantitative change big, the design discharge that has surpassed steam jet ejector is then directly passed through a part of steam by modulating valve or reduction valve control from bypass 3.
3, band bypass and steam jet ejector composite set in parallel or series connection
Referring to Fig. 4, native system is the steam jet ejector composite set based on above-mentioned band bypass, and steam jet ejector 1 wherein is designed to the structure of two parallel connections, and its working principle is basic identical in said apparatus, be that base load is the load of two or more variations with the said apparatus difference.Composite set keeps the vapor stream of normal duty through each steam jet ejector in adjustment process, if the steam flow that equipment uses has surpassed the design discharge of steam jet ejector, then directly passes through a part of steam by modulating valve or reduction valve control from bypass.
Claims (4)
1. steam jet ejector composite set, it comprises steam jet ejector, the low-pressure suction mouth C of steam jet ejector links to each other with the low pressure steam pipeline; It is characterized in that: steam inlet A and picking out of steam ouput B at described steam jet ejector are separately installed with steam storage tank or phase-transformation type steam accumulator on the pipeline, the steam storage tank of admission end or phase-transformation type steam accumulator link to each other with the high pressure steam pipeline, and the steam storage tank of steam output end or phase-transformation type steam accumulator link to each other with the process steam pipeline.
2. steam jet ejector composite set according to claim 1 is characterized in that: be connected steam jet ejector between steam storage tank or the phase-transformation type steam accumulator and adopt one or more in parallel or be connected in series.
3. steam jet ejector composite set according to claim 1 and 2 is characterized in that: also can connect a bypass that has modulating valve or a reduction valve between two steam storage tanks or phase-transformation type steam accumulator.
4. steam jet ejector composite set according to claim 1 and 2, it is characterized in that: on the described steam inlet A that is connected in steam jet ejector is high pressure steam storage tank or phase-transformation type steam accumulator, and being connected on the steam supply mouth B of steam jet ejector is medium pressure steam storage tank or phase-transformation type steam accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010513159 CN102003419A (en) | 2010-10-21 | 2010-10-21 | Steam ejector composite set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010513159 CN102003419A (en) | 2010-10-21 | 2010-10-21 | Steam ejector composite set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102003419A true CN102003419A (en) | 2011-04-06 |
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ID=43811046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010513159 Pending CN102003419A (en) | 2010-10-21 | 2010-10-21 | Steam ejector composite set |
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|---|---|
| CN (1) | CN102003419A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320576A (en) * | 2011-09-02 | 2012-01-18 | 中国石油集团工程设计有限责任公司 | Low temperature Claus steam energy recovery and control method |
| CN103573305A (en) * | 2012-07-31 | 2014-02-12 | 株式会社东芝 | Steam turbine plant and control method and control system thereof |
| CN103953917A (en) * | 2014-04-16 | 2014-07-30 | 中冶南方工程技术有限公司 | Heat accumulation system structure capable of generating slightly-superheated steam |
| CN104832462A (en) * | 2015-01-14 | 2015-08-12 | 上海核工程研究设计院 | Ejector system for vacuum-pumping of reactor coolant system |
| CN104832463A (en) * | 2015-01-14 | 2015-08-12 | 上海核工程研究设计院 | Ejector system for vacuumizing pressurized water reactor cooling agent system |
| CN109083871A (en) * | 2017-06-13 | 2018-12-25 | 杭州恒勋能源科技有限公司 | A kind of pressure matcher and its operation method |
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| CN201865991U (en) * | 2010-10-21 | 2011-06-15 | 重庆智得热工工业有限公司 | Combined device for steam ejector |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2632367Y (en) * | 2003-08-08 | 2004-08-11 | 云南昆船第一机械有限公司 | Steam jet pump vacuum pumping system device |
| CN2881356Y (en) * | 2005-08-09 | 2007-03-21 | 中冶赛迪工程技术股份有限公司 | Pressure changed heat storage device with micro-super heat |
| CN201062712Y (en) * | 2007-06-05 | 2008-05-21 | 北京弘泰斯奔思技术服务有限责任公司 | Condensation water enclosed reclaimer |
| CN101240909A (en) * | 2008-03-19 | 2008-08-13 | 清华大学 | Steam jet type heat pump heat distribution system for recovering thermal power plant condensing residual heat |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320576A (en) * | 2011-09-02 | 2012-01-18 | 中国石油集团工程设计有限责任公司 | Low temperature Claus steam energy recovery and control method |
| CN102320576B (en) * | 2011-09-02 | 2013-06-05 | 中国石油集团工程设计有限责任公司 | Low temperature Claus steam energy recovery and control method |
| CN103573305A (en) * | 2012-07-31 | 2014-02-12 | 株式会社东芝 | Steam turbine plant and control method and control system thereof |
| CN103953917A (en) * | 2014-04-16 | 2014-07-30 | 中冶南方工程技术有限公司 | Heat accumulation system structure capable of generating slightly-superheated steam |
| CN103953917B (en) * | 2014-04-16 | 2015-12-02 | 中冶南方工程技术有限公司 | A kind of hold over system structure producing micro-superheated steam |
| CN104832462A (en) * | 2015-01-14 | 2015-08-12 | 上海核工程研究设计院 | Ejector system for vacuum-pumping of reactor coolant system |
| CN104832463A (en) * | 2015-01-14 | 2015-08-12 | 上海核工程研究设计院 | Ejector system for vacuumizing pressurized water reactor cooling agent system |
| CN109083871A (en) * | 2017-06-13 | 2018-12-25 | 杭州恒勋能源科技有限公司 | A kind of pressure matcher and its operation method |
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Application publication date: 20110406 |