CN100498178C - Low-condensed-water recovering system - Google Patents
Low-condensed-water recovering system Download PDFInfo
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- CN100498178C CN100498178C CNB2006101137651A CN200610113765A CN100498178C CN 100498178 C CN100498178 C CN 100498178C CN B2006101137651 A CNB2006101137651 A CN B2006101137651A CN 200610113765 A CN200610113765 A CN 200610113765A CN 100498178 C CN100498178 C CN 100498178C
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Abstract
This invention relates to a recovery system for low pressure heaters composed of a fluid absorbing and discharging device and a temperature-rising recovery device, in which, said temperature-rising recovery device is made up of one tank or multiple tanks in series, the inlet of which is connected with the outlet of the jet absorbing and discharging device with several high pressure pumps, said absorbing and discharging device includes a jet inlet and absorbing inlet and said outlet, said jet inlet is connected with the output pipeline of said high pressure pump, the absorbing inlet is connected to the condensation water outlet of the heater, Venturi tubes, new type of large flow jet-absorbing tubes or multi-level multi-tube jet absorbing pumps can be applied for the jet absorbing device, which can enables the use of condensation water of low pressure heaters without reducing the temperature by a dead steam condensater.
Description
Technical field
The present invention relates to a kind of low-condensed-water recovering system that is mainly used in power plant.
Background technology
Under the prior art, the condensate water that produces with the supporting low-pressure heater of steam turbine in the power plant (the low water with fixed attention that adds) is introduced the exhaust steam output channel of steam turbine by pipeline, together send into the exhaust steam condenser, not only increased the treating capacity of exhaust steam condenser thus, increase cost of investment and operating cost, also caused unnecessary heat-energy losses.
Summary of the invention
For overcoming the above-mentioned defective of prior art, the invention provides a kind of low-condensed-water recovering system, adopt this recovery system after, low add with fixed attention that water just can be used without the exhaust steam condenser, reduced thermal waste thus.
The present invention realizes that the technical scheme of above-mentioned purpose is: a kind of low-condensed-water recovering system, mainly inhale injection device and heat retracting device and constitute by jet, the described import that heats retracting device connects the jet exit that described jet is inhaled injection device, the described outlet that heats retracting device is provided with some high-pressure pumps, described jet is inhaled injection device and is provided with the jet import, suction injects mouth and jet exit, its jet import connects the output channel of described high-pressure pump, suction injects the water out that coagulates of mouthful connection low-pressure heater, the described retracting device that heats adopts the tank body group that is connected into by a plurality of tank bodies, the described import that heats the import of retracting device for first tank body, the described outlet that heats the outlet of retracting device for last tank body, described each tank body connects with pipeline successively by series connection, the series connection of adjacent two tank bodies is a plurality of with the quantity of pipeline, connects the top of tank body respectively, middle part and bottom.
The invention has the beneficial effects as follows: owing to adopted jet to inhale injection device, can carry out supercharging and carry the low water that adds with fixed attention, in recycling can, form high pressure, improved coolant-temperature gage with fixed attention thus, and make and be mixed in low pressure and coagulate steam in the water and all be converted into water with fixed attention, therefore not needing condensation through the exhaust steam condenser just to can be used as condensate water is used, avoided the heat-energy losses in the condensation, saved the energy, reduced thermal pollution to environment, reduce the load of exhaust steam condenser, saved cost of investment and operating cost.In addition, this system architecture is simple, and manufacturing and operating cost are low, easy to use.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of large-flow jet suction jet pipe of the present invention;
Fig. 3 is the structural representation of multi-stage multi-pipe ejector pump of the present invention.
The specific embodiment
Referring to Fig. 1, low-condensed-water recovering system provided by the invention can be connected in the heat distribution pipe network of steam turbine and use.The exhaust steam of steam turbine 1 inserts exhaust steam condenser 3 and carries out condensation, forms negative pressure or certain vacuum at the steam turbine afterbody, to improve the generating capacity of steam turbine.The condensate water that forms after the exhaust steam condensation is sent into water pot 2 with fixed attention, and through after some heater heating, finally enters boiler feed 8 and be used.Each heater obtains the steam of heating usefulness from steam turbine, by heat exchange the exhaust steam condensate water is heated, and to improve the temperature of this condensate water step by step, makes it to be applicable to the requirement of oxygen-eliminating device.Higher relatively at the heat medium (steam or steam water interface) that post-heater is discharged owing to temperature, can enter at preceding heater and continue to use as heat medium, final low-pressure heater 9 is up front discharged, the low water with fixed attention that adds of formation.Should low add with fixed attention that water inserts low-condensed-water recovering system of the present invention, after heating through pressurization, insert the circulating line of exhaust steam condensate water, with the exhaust steam condensate water with entering boiler feed.The low concrete access point that coagulates water access exhaust steam condensing water conduit that adds after the present invention handles is decided on its temperature and pressure, generally should adapt with the temperature and pressure of access point exhaust steam condensate water.For example, can it press the input pipeline of heater in inserting, so that with the exhaust steam condensate water one subsequent stages heater heating that coexists, to reach the required temperature of oxygen-eliminating device.
Generally, the described retracting device that heats adopts the tank body group that is connected into by 2 tank bodies 5, wherein previous tank body is a booster jar, the low water that adds is with fixed attention inhaled injection device 7 high pressure by jet and is sent into, form high pressure in booster jar, heat and condensation effect with raising, a back tank body is the low-voltage vacuum jar, the water that coagulates in the booster jar enters this jar, is extracted out by the high-pressure pump 6 that the tank base outlet connects.The treatment effect of this two tank bodies series connection is good, and structure is simple relatively.
Each tank body in the described tank body group connects with pipeline 4 successively by series connection, and wherein the import of first tank body constitutes the described import that heats retracting device, the described outlet that heats retracting device of the export mixes of last tank body.
The series connection of adjacent two tank bodies can be 1 with pipeline, also can be a plurality of.Different series connection can be connected on the different parts (highly) of tank body with pipeline, are beneficial to the isostasy of tank interior and stablize, and reduce resistance.When some series connection connect the different parts of tank body respectively with pipeline, normally connect the upper, middle and lower of tank body respectively, corresponding series connection can be called as tube connector, middle tube connector and following tube connector respectively with pipeline.Concrete quantity can for example go up 2 of tube connectors according to the virtual condition setting, each 1 of middle tube connector and following tube connector.
The described import that heats retracting device is arranged on the top of corresponding tank body (first tank body in single tank body or the tank body group) usually, the described outlet that heats retracting device can be arranged on the bottom of corresponding tank body (last tank body in single tank body or the tank body group), so that inner media flow.
The quantity of described high-pressure pump can be one, also can be a plurality of, and can be provided with stand-by pump.Two high-pressure pumps of the using and the reserved for example are set, or dual-purpose one is equipped with three high-pressure pumps.
A condensate water part of sending from high-pressure pump inserts the jet import that jet is inhaled injection device, be used to produce inhale and penetrate required jet, another part inserts exhaust steam condensate circulating water pipe road, the oxygen-eliminating device that enters boiler is recycling, or insert other pipelines so that utilize, formed the two-way output of high-pressure pump thus.When the quantity (not comprising stand-by pump) of high-pressure pump when being 1, its output channel connects jet respectively and inhales the jet import of injection device and exhaust steam condensate circulating water pipe road (or other pipelines, down with); When the quantity (not comprising stand-by pump) of high-pressure pump when a plurality of, can adopt two kinds of different output connected modes: first kind is the jet import of the efferent duct connection jet suction injection device of part of high-pressure pump, the efferent duct of part of high-pressure pump connects exhaust steam condensate circulating water pipe road, two-way output is not disturbed mutually under this mode, can carry out independent control; Second kind is that the efferent duct of each high-pressure pump interconnects, and forms unified output pipe, connects jet import and exhaust steam condensate circulating water pipe road that jet is inhaled injection device then respectively, and this mode helps the simplification of system.
Described jet is inhaled injection device 7 can adopt Venturi tube, is the jet import with the convergent mouth of pipe of Venturi tube, and the trunnion interface injects mouth for inhaling, and the flaring mouth of pipe is the outlet that described jet is inhaled injection device.
Described jet is inhaled injection device 7 and can be adopted the jet of novel big flow suction jet pipe, multi-stage multi-pipe ejector pump or other any suitable to inhale injection device.
Referring to Fig. 2, described big flow suction jet pipe comprises jet pipe 79 and inner suction pipe 71, the rear and front end of described jet pipe is respectively equipped with export and import, described inner suction pipe penetrates in the described jet pipe outside described jet pipe, and be connected with described jet pipe, it is positioned at the outer part of described jet pipe and is provided with and is used to connect the inner suction pipe import of being penetrated medium by suction, the part that is positioned at described jet pipe is provided with an extension 76, and (this extension is with demarcating by the bending structure between other parts of inner suction pipe, the structure of also can not demarcating, down together), extend along the outflow direction of the medium channel in the described jet pipe described extension, and the end is provided with the outlet of inner suction pipe.When adopting this big flow suction jet pipe to inhale injection device as the jet of this patent, its jet pipe import has constituted the jet import that jet is inhaled injection device, the jet pipe export mixes jet outlet of inhaling injection device, the inner suction pipe import has constituted jet and has inhaled the suction of injection device and inject mouth.
The described inner suction pipe external diameter that is positioned at jet pipe should be less than the jet pipe internal diameter, leave the gap between described inner suction pipe extension outer wall and the described jet pipe inwall, this gap area has constituted one section passage of jet media, because the sectional area of this section passage obviously reduces, and has greatly improved jet velocity.
The axis of described inner suction pipe extension (center line, down with) generally should with the dead in line of described jet pipe, the gap between its outer wall and the described jet pipe inwall is wide annular gap.Under this structure, the MEDIA FLOW in the medium in this inner suction pipe extension and the jet pipe is to identical, and gap pressure medium and flow velocity basis equalization everywhere, helps reducing turbulent flow and resistance.
Described jet pipe generally can be a straight tube, and the part that described inner suction pipe is positioned at jet pipe generally can be provided with 90 ° of bendings, and it is vertical with described jet pipe to be positioned at the outer part of jet pipe.
Described jet pipe and inner suction pipe also can adopt various other straight tubes or bend pipe structure and other compound modes.
The diameter that described inner suction pipe is positioned at the part of jet pipe outside can also can be equal to or greater than the jet pipe diameter less than the jet pipe diameter, requires to decide on concrete conveying.
The front portion of described jet pipe can be provided with tapered mouth 73, so that form jetting stream outside outlet, satisfies the needs of certain occasion.
The main part of described jet pipe and inner suction pipe all can be isometrical pipe, to make things convenient for processing and manufacturing, can at least one be not isometrical pipe also, with flow velocity and the resistance requirement that adapts to diverse location.When described main part adopted not isometrical pipe, the reducing place can be in the junction of jet pipe and inner suction pipe, also can be at other positions.
Can adopt welding, single injection-molded or other any-modes to connect between described inner suction pipe and the jet pipe.
Described jet pipe entrance point and described inner suction pipe entrance point all can be provided with flange, or external screw thread or internal thread are set on tube wall, and pipeline connects and installation so that carry out.
Referring to Fig. 3, described multi-stage multi-pipe ejector pump comprises the pump housing 77 and some big flow suction jet pipes, be provided with the fluid passage in the described pump housing, and be provided with outlet, described big flow suction jet pipe adopts above-mentioned big flow suction jet pipe, jet pipe 79 in the described big flow suction jet pipe penetrates outside described in the described pump housing, and be connected with the described pump housing, its import is positioned at outside the described pump housing, outlet is positioned at the described pump housing, and towards the Way out of the pump housing, inner suction pipe 71 in the described big flow suction jet pipe penetrates in the described pump housing and the described jet pipe outside the described pump housing and described jet pipe, and be connected with described jet pipe with the described pump housing, it is positioned at the outer part of the described pump housing and is used to connect the inner suction pipe import of being penetrated medium by suction, the part that is positioned at described jet pipe is provided with an extension, and extend along the outflow direction of the medium channel in the described jet pipe described extension, and the end is provided with the outlet of inner suction pipe.This big flow suction jet pipe can adopt the various technical schemes of foregoing big flow suction jet pipe, and the position of its inner suction pipe import and extension is according to top described, and its various embodiments do not repeat them here.When adopting this multitube multistage suction-ejection pump to inhale injection device as the jet of this patent, described each jet pipe import has constituted the jet import that jet is inhaled injection device, each jet pipe export mixes the jet outlet of inhaling injection device, each inner suction pipe import has constituted jet and has inhaled the suction of injection device and inject mouth.
The described pump housing is provided with the rear enclosed plate, and the medium that therefore flows into the pump housing can only flow out from the outlet of pump housing front, enters the output channel that is connected with pump housing outlet.
The direction of described each jet pipe (the medium channel direction is the media flow direction, down together) can be identical with the direction (the medium channel direction is the media flow direction, down together) of the described pump housing, to reduce turbulent flow and resistance.
Be simplified structure, described jet pipe can be a straight tube, and its main part can be isometrical pipe, and this jet pipe passes the described pump housing from the rear enclosed plate of the described pump housing, and fixes and be tightly connected with this rear enclosed plate.
Described inner suction pipe can pass the described jet pipe and the pump housing from the sidewall of the corresponding jet pipe and the pump housing, extends to outside the pump housing and jet pipe in the pump housing and the jet pipe.
The quantity of described big flow suction jet pipe can be provided with arbitrarily according to actual needs.When quantity was two or more, the jet pipe of each big flow suction jet pipe can evenly distribute on respect to one or more faces of cylinder of pump housing axis, and the position that each inner suction pipe passes the pump housing can be provided with arbitrarily according to the installation and the connection request of reality.
The main part of the described pump housing can adopt isometrical cylindrical shell, also can adopt not isometrical cylindrical shell.When adopting not isometrical cylindrical shell, generally can be provided with the throat 75 of contraction (diameter reduces) in the middle part, the position of its diameter minimum is positioned at the front of each jet pipe port of export of the pump housing, described jet pipe is preferably with the jet pipe of tapered mouth, the jet that comes out from the jet pipe tapered mouth improves at the flow velocity of pump housing throat, to be adapted to the requirement that medium mixes and suction is penetrated to external pipe.
The described pump housing can be provided with one or more outer suction pipes 72, described outer suction pipe is positioned at pump housing outside, one end is provided with to connect is inhaled the import of penetrating medium, the other end is connected on the sidewall of the pump housing, and be provided with the outlet that is communicated with medium channel in the pump housing, the i.e. pump housing sidewall upper shed of suction pipe end outside being positioned at.High-speed jet formation negative pressure in pump housing during work attracts to be penetrated medium by suction and flows into the pump housing from the opening on the pump housing sidewall, the formation multistage suction-ejection.When adopting this multi-stage multi-pipe ejector pump to be jet suction injection device, the suction that the import of its outer suction pipe equally also constitutes described jet suction injection device injects mouth.
The part that described outer suction pipe connects the pump housing can be enclosed within corresponding inner suction pipe outside, its outlet is positioned at the back of each jet pipe outlet, the negative pressure that can utilize the jet that penetrates from jet pipe that its back space is formed is thus inhaled and is penetrated, this suction penetrate mode similar with the suction of medium in the inner suction pipe is penetrated, can form bigger suction amount of jet; Described outer suction pipe also can be arranged on the throat of the pump housing, and with convenient processing, this suction mode of penetrating is similar to existing Venturi tube.
Described arbitrary tank body passes another tank body interconnecting all to should be and be tightly connected when (comprising the pump housing).
The link of described each tank body (comprising the pump housing) can be provided with flange, or outer/inner screw thread, and pipeline connects and installation so that carry out.
Series connection be with all can being provided with electrically-controlled valve and/or non-return valve and/or other valves on the output channel of pipeline, described high-pressure pump and other pipelines that the present invention relates between described tank body, so as to carry out automatically controlled, prevent backflow and other control.For the pipeline that is provided with electrically-controlled valve, bypass duct can also be set, described bypass duct can be provided with valve, so that when electrically-controlled valve lost efficacy that bypass is open-minded.Described electrically-controlled valve can be provided with corresponding sensor and control circuit, and described sensor can be installed on the corresponding tank body, by the action of parameters such as pressure in the tank body and/or liquid level control electrically-controlled valve.Described various valve, sensor and control circuit, bypass duct etc. all can adopt prior art.
Describedly connect the outlet that is meant adjacent previous equipment connects a back equipment by pipeline import successively by pipe method.When the position that relates to each equipment concerns, explain the front and back of equipment in proper order according to the front and back of technological process, before the equipment that medium flows through earlier is, after through equipment be after, and relating to the media flow direction particularly during the media flow direction in the individual equipment, stream forward after the flow direction of determining medium is served as reasons.Each equipment can be according to steric requirements and the convenient distribution mode that is provided with arbitrarily on the space of operation in the practice, be not subjected to technological process or MEDIA FLOW to restriction.
Claims (8)
1. low-condensed-water recovering system, mainly inhale injection device and heat retracting device and constitute by jet, the described import that heats retracting device connects the jet exit that described jet is inhaled injection device, the described outlet that heats retracting device is provided with some high-pressure pumps, described jet is inhaled injection device and is provided with the jet import, suction injects mouth and jet exit, its jet import connects the output channel of described high-pressure pump, suction injects the water out that coagulates of mouthful connection low-pressure heater, it is characterized in that the described retracting device that heats adopts the tank body group that is connected into by a plurality of tank bodies, the described import that heats the import of retracting device for first tank body, the described outlet that heats the outlet of retracting device for last tank body, described each tank body connects with pipeline successively by series connection, the series connection of adjacent two tank bodies is a plurality of with the quantity of pipeline, connects the top of tank body respectively, middle part and bottom.
2. low-condensed-water recovering system as claimed in claim 1, it is characterized in that the described import that heats retracting device is arranged on the top of corresponding tank body, the described outlet that heats retracting device is arranged on the bottom of corresponding tank body, and described high-pressure pump is two of the using and the reserved, perhaps is dual-purpose one to be equipped with three.
3. low-condensed-water recovering system as claimed in claim 1 or 2, it is characterized in that described jet suction injection device adopts Venturi tube, the convergent mouth of pipe with Venturi tube is the jet import that described jet is inhaled injection device, the trunnion interface is that the suction of described jet suction injection device injects mouth, and the flaring mouth of pipe is the outlet that described jet is inhaled injection device.
4. low-condensed-water recovering system as claimed in claim 1 or 2, it is characterized in that described jet suction injection device adopts big flow suction jet pipe, described big flow suction jet pipe comprises jet pipe and inner suction pipe, the rear and front end of described jet pipe is respectively equipped with export and import, described inner suction pipe penetrates in the described jet pipe outside described jet pipe, and be connected with described jet pipe, it is positioned at the outer part of described jet pipe and is provided with and is used to connect the inner suction pipe import of being penetrated medium by suction, the part that is positioned at described jet pipe is provided with an extension, extend along the outflow direction of the medium channel in the described jet pipe described extension, the end is provided with the outlet of inner suction pipe, the jet import that described jet is inhaled injection device is described jet pipe import, the outlet that described jet is inhaled injection device is described jet pipe outlet, and the suction of described jet suction injection device injects mouth and is described inner suction pipe import.
5. low-condensed-water recovering system as claimed in claim 4, it is characterized in that described inner suction pipe is positioned at the external diameter of part of jet pipe less than the jet pipe internal diameter, leave the gap between described inner suction pipe extension outer wall and the described jet pipe inwall, the axis of described inner suction pipe extension and the dead in line of described jet pipe, gap between its outer wall and the described jet pipe inwall is wide annular gap, described jet pipe is a straight tube, the part that described inner suction pipe is positioned at jet pipe is provided with 90 ° of bendings, and it is vertical with described jet pipe to be positioned at the outer part of jet pipe.
6. low-condensed-water recovering system as claimed in claim 1 or 2, it is characterized in that described jet suction injection device adopts the multi-stage multi-pipe ejector pump, described multi-stage multi-pipe ejector pump comprises the pump housing and some big flow suction jet pipes, be provided with the fluid passage in the described pump housing, pump housing front end is provided with the outlet of fluid passage, described big flow suction jet pipe comprises jet pipe and inner suction pipe, described jet pipe penetrates in the described pump housing outside the described pump housing, and be connected with the described pump housing, its rear and front end is respectively equipped with export and import, described jet pipe import is positioned at outside the described pump housing, described jet pipe outlet is positioned at the described pump housing, and in the pump housing outflow direction of medium channel, described inner suction pipe penetrates in the described pump housing and the described jet pipe outside the described pump housing and described jet pipe, and be connected with the described pump housing with described jet pipe, it is positioned at the outer part of the described pump housing and is provided with and is used to connect the inner suction pipe import of being penetrated medium by suction, the part that is positioned at described jet pipe is provided with an extension, extend along the outflow direction of the medium channel in the described jet pipe described extension, the end is provided with the outlet of inner suction pipe, the jet import that described jet is inhaled injection device is each jet pipe import, the outlet that described jet is inhaled injection device is each jet pipe outlet, and the suction of described jet suction injection device injects mouth and is each inner suction pipe import.
7. low-condensed-water recovering system as claimed in claim 6, it is characterized in that described inner suction pipe is positioned at the external diameter of part of jet pipe less than the jet pipe internal diameter, leave the gap between described inner suction pipe extension outer wall and the described jet pipe inwall, the described pump housing is provided with one or more outer suction pipes, described outer suction pipe is positioned at pump housing outside, one end is provided with to connect is inhaled the import of penetrating medium, the other end is connected on the sidewall of the pump housing, and be provided with the outlet that is communicated with medium channel in the pump housing, its outlet is positioned at the back of each jet pipe outlet, and the suction that described jet is inhaled injection device injects the import that mouth also comprises described outer suction pipe.
8. low-condensed-water recovering system as claimed in claim 7, it is characterized in that the axis of described inner suction pipe extension and the dead in line of described jet pipe, gap between its outer wall and the described jet pipe inwall is wide annular gap, described jet pipe is a straight tube, the part that described inner suction pipe is positioned at jet pipe is provided with 90 ° of bendings, it is vertical with described jet pipe to be positioned at the outer part of jet pipe, the front portion of described jet pipe is provided with tapered mouth, the described pump housing is provided with the rear enclosed plate, the media flow direction of described each jet pipe is identical with the media flow direction of the described pump housing, described jet pipe main part is isometrical straight tube, pass the described pump housing from the rear enclosed plate of the described pump housing, and fix and be tightly connected with this rear enclosed plate, described inner suction pipe passes the described jet pipe and the pump housing from the sidewall of the corresponding jet pipe and the pump housing, the quantity of described big flow suction jet pipe is two or more, and the jet pipe of described each big flow suction jet pipe evenly distributes on respect to one or more faces of cylinder of pump housing axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101137651A CN100498178C (en) | 2006-10-16 | 2006-10-16 | Low-condensed-water recovering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101137651A CN100498178C (en) | 2006-10-16 | 2006-10-16 | Low-condensed-water recovering system |
Publications (2)
| Publication Number | Publication Date |
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| CN1936477A CN1936477A (en) | 2007-03-28 |
| CN100498178C true CN100498178C (en) | 2009-06-10 |
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| CNB2006101137651A Expired - Fee Related CN100498178C (en) | 2006-10-16 | 2006-10-16 | Low-condensed-water recovering system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5171334B2 (en) * | 2008-03-24 | 2013-03-27 | 株式会社神戸製鋼所 | Power generator |
| CN101846309B (en) * | 2009-03-24 | 2012-05-23 | 扬州石化有限责任公司 | Boiler room exhaust steam recovery unit |
| CN104018900A (en) * | 2014-06-09 | 2014-09-03 | 匡仲平 | Thermoelectric unit water and energy saving device |
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2006
- 2006-10-16 CN CNB2006101137651A patent/CN100498178C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 水力喷射式凝结水闭式回收循环再利用系统的应用. 王毓杰，高玉杰，王剑平.流体机械，第24卷第10期. 1996 |
| 水力喷射式凝结水闭式回收循环再利用系统的应用. 王毓杰，高玉杰，王剑平.流体机械，第24卷第10期. 1996 * |
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