WO2012122762A1 - Turbine vacuum steam heating and pressurizing reuse system - Google Patents

Turbine vacuum steam heating and pressurizing reuse system Download PDF

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Publication number
WO2012122762A1
WO2012122762A1 PCT/CN2011/076836 CN2011076836W WO2012122762A1 WO 2012122762 A1 WO2012122762 A1 WO 2012122762A1 CN 2011076836 W CN2011076836 W CN 2011076836W WO 2012122762 A1 WO2012122762 A1 WO 2012122762A1
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WO
WIPO (PCT)
Prior art keywords
jet
pump
tube
jet pump
outlet
Prior art date
Application number
PCT/CN2011/076836
Other languages
French (fr)
Chinese (zh)
Inventor
李树生
Original Assignee
Li Shusheng
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Filing date
Publication date
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Publication of WO2012122762A1 publication Critical patent/WO2012122762A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04FPUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/54Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K19/00Regenerating or otherwise treating steam exhausted from steam engine plant
    • F01K19/02Regenerating by compression
    • F01K19/08Regenerating by compression compression done by injection apparatus, jet blower, or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/02Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/08Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being steam
    • F22B1/14Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being steam coming in direct contact with water in bulk or in sprays

Definitions

  • the invention relates to a steam turbine vacuum recovery system for recycling and recycling vacuum steam discharged from a steam turbine.
  • the prior art steam turbine vacuum recovery system mainly uses a steam-water circulation system composed of a vacuum such as a steam turbine 1, a condenser 2, a deaerator 6 and a cooling tower 3 to realize water vapor in the steam. Recycling and waste heat discharge.
  • a steam turbine vacuum recovery system can recover part of vacuum steam for reuse, a large part of vacuum steam is directly or indirectly discharged into the atmosphere, which wastes a lot of heat energy. The thermal pollution of the environment.
  • the vacuum steam generated by the vacuum steam plant is recovered in some systems, since the vacuum steam pressure is low, it is not easy to flow in the pipe, so that the recovery rate of the vacuum steam is limited, and the working efficiency of the system is not high.
  • the object of the present invention is to provide a steam turbine vacuum stripping temperature lifting and reusing system, which can improve water resources and heat energy in vacuum steam without affecting the operation of the vacuum equipment. Recycled after warming.
  • a steam turbine vacuum stripping temperature lifting and recycling system comprising a condenser, further comprising a recovery tank, a first-stage jet pump and a secondary jet pump, wherein the recovery tank is provided with a jet pipeline and a return water pipeline, the jet pipeline and The water return pipe is connected to the water storage area of the recovery tank through the same drainage main pipe or each of the water storage areas of the recovery tank, and the high pressure drainage pump is arranged on the discharge pipe of the water storage area independently connected to the recovery tank.
  • a return water pump is disposed on the water return pipe independently connected to the water storage area of the recovery tank, and the jet inlets of the primary jet pump and the secondary jet pump are connected to the outlet pipe of the condenser through a pipeline and/or a jet pipe, a suction inlet of the primary jet pump is connected to an exhaust pipe of the condenser, and a suction inlet of the secondary jet pump is connected to an outlet of the primary jet pump, the secondary jet pump The outlet is connected to the inlet of the recovery tank.
  • the primary jet pump is preferably a tubular jet pump, and the secondary jet pump is preferably a multi-stage jet pump.
  • the recovery tank is a vertical recovery tank.
  • the secondary jet pump may be a vertical jet pump provided with two stages of pressurization, and may be provided with a first-stage jet tube and a second-stage jet tube, and the inlets of the first-stage jet tube and the second-stage jet tube constitute the second a jet inlet of a stage jet pump, the jet of the primary jet tube being used to pressurize a medium flow entering from a suction inlet of the secondary jet pump, the jet of the secondary jet tube being used for the first stage The pressurization of the medium flow after the jet tube is pressurized.
  • the number of the first-stage jet tubes and/or the number of the second-stage jet tubes may be one or more.
  • the suction inlets of the second-stage jet pumps may be divided into In the case of multiple paths, each of the first-stage jet tubes is pressurized from a medium flow entering from a suction inlet of the corresponding two-stage jet pump corresponding thereto, and when the number of the two-stage flow tubes is plural, The outlets of the plurality of secondary jet tubes may be evenly distributed over a section of the medium passage of the pump body of the secondary jet pump.
  • the pump body of the secondary jet pump is preferably in a vertical tubular shape, and is provided with a plurality of suction pipes, the suction pipes can be rotationally symmetrically distributed, and the inlets of the suction pipes constitute the pumping of the secondary jet pump.
  • the suction pipe may extend through the side wall of the pump body into the pump body, and a portion of the pump body is provided with a downward bend, and a suction pipe located below the bend may be
  • the pump body of the secondary jet pump has a straight tubular shape with the same axial direction, and the secondary jet tube can extend through the rear end surface of the pump body of the secondary jet pump to the pump body, and the outlet thereof can be located at the respective Above the outlet of the suction pipe and the outlet of the respective suction pipe is located in the injection region of its jet, the primary jet can penetrate the suction pipe outside the pump and extend along the suction pipe The direction extends all the way to the outlet section of the suction pipe, the outlet of which can be located on the inner side of the outlet of the suction pipe, the jet injection zone gradually expanding in the axial direction of the suction pipe to the entire section in the suction pipe .
  • the main body portion of the pump body of the secondary jet pump has a vertical tubular shape
  • the rear portion is elbow-shaped
  • the outer end of the elbow constitutes a suction inlet of the secondary jet pump
  • the first-stage jet tube An inner cavity of the secondary jet pump may be inserted from a rear portion of the secondary jet pump along an axis of the pump body of the secondary jet pump, and a first-stage jet disposed in the pump body of the secondary jet pump a tube extension, the first-stage jet tube extending portion preferably having a straight tubular shape
  • the secondary jet tube may penetrate from a side wall of the pump body of the secondary jet pump into a pump body of the secondary jet pump, which is located a portion of the pump body of the secondary jet pump is provided with a bend, preferably after being bent, in a straight tubular shape which is the same as the axial direction of the pump body of the secondary jet pump, and the outlet of the secondary jet tube is located at the Within the injection zone of the outlet of the primary jet tube.
  • the main body portion of the pump body of the primary jet pump is preferably tubular, the inlet of the tubular pump body constitutes a suction inlet of the primary jet pump, and the outlet constitutes an outlet of the primary jet pump, the primary jet pump
  • the jet tube may be provided with a jet port or a jet tube located in the pump body, and the number of the jet port or the jet tube may be plural, distributed on the same cross section of the tubular pump body or a plurality of different cross tubes. In the section, and extending toward the axis of the pump body.
  • the first-stage jet pump jet pipe may pass through a sidewall of the pump body and be connected to a jet distribution tube located in the pump body, the jet distribution tube including an extension coaxial with the first-stage jet pump jet pipe.
  • the extension section may or may not be provided with an intersecting tube, the extension section and the port of the cross tube are closed, and the extension section and the cross tube may be provided with a plurality of jet ports or jet tubes, and the jets may be provided.
  • the mouth or jet tube is evenly distributed over the extension and the cross tube.
  • the recovery tank may further be provided with a safety valve and an exhaust valve, which are preferably respectively installed at the top of the recovery tank, the recovery tank being used for connecting the drainage main pipe or the respective
  • a condensate outlet for independently connecting the water conduit of the recovery tank and a condensate outlet for the return water conduit is preferably disposed at the bottom of the recovery tank, and the number of the high pressure drain pumps is preferably two or more for one use. More than one.
  • the return water pipe can usually be provided with drainage control or cutting width, which can be connected to the water inlet of the deaerator of the boiler system, thereby realizing direct reuse of the condensed water and heat in the existing steam turbine power generation system.
  • the recovery tank may be provided with a sensing device for collecting its water level signal, the signal output end of the sensing device is connected to a control device, and the control signal output end of the control device is connected to the drainage control or cuts off the wide Control the line, thereby achieving control of the drain of the recovery tank and maintaining the working pressure in the recovery tank.
  • the number of the recovery tanks may be several, and the number of the primary jet pumps and the secondary jet pumps is the same as the number of the recovery tanks, and is correspondingly set.
  • the invention adopts two-stage jet pumps with different structures to cooperate with each other, solves the problem of vacuum vapority in the large-diameter pipe through the first-stage jet pump, and sends the vacuum steam and the condensed water to the recovery tank through the secondary jet pump. Therefore, the technical problem that it is difficult to improve the recovery efficiency of the vacuum steam under the large diameter is overcome by the prior art. Due to the characteristics of the fluid medium, the technical means used in the present invention are connected in series with the same plurality of jet pumps or Parallel, at the same flow rate and boost amplitude, can significantly reduce power consumption and simplify the overall composition of the system.
  • the two-stage jet pump matching method defined by the present invention is combined with a plurality of common jet pumps in series and parallel mode according to the enthalpy (two branches according to the flow rate, each according to the pressure increase range) Two jet pumps are connected in series on the branch road.
  • the power consumption is reduced by about 2.
  • the introduction of the pipeline-type first-stage jet pump effectively increases the flow velocity of the vacuum steam in the exhaust pipe of the condenser, that is, increases the supply of vacuum steam, and provides sufficient vacuum steam for the recovery tank to solve
  • the vacuum steam in the conveying pipe (diameter lm ⁇ 2m) is difficult to recover due to the large diameter of the pipe and the low flow velocity caused by the low vacuum pressure, and the pressure of the secondary jet pump is also provided.
  • the relatively high suctioned medium helps to increase the suction effect of the secondary jet pump;
  • the jet distribution tube of the primary jet pump is arranged to form a balanced distribution of multiple jets in the pump body of the primary jet pump, throughout A negative pressure region is formed on the medium passage to drive the forward flow from the inlet end of the pump body, which overcomes the difficulty of solving the medium fluidity under the large diameter pipe due to the small medium flow rate and power consumption of the conventional common jet pump. Defects.
  • the pressure is increased, which is beneficial to the suction of the secondary jet pump.
  • the multiple suction inlets of the secondary jet pump can be set more effectively from the first-stage jet pump.
  • the pressurized medium is pressurized to allow the pumped medium to enter the recovery tank more smoothly.
  • the vacuum steam in the condenser is sucked into the recovery tank by the primary jet pump and the secondary jet pump, and converted into high-temperature and high-pressure water that can be reused in the recovery tank, which not only effectively utilizes the turbine discharge
  • the vacuum steam and by increasing the suction effect of the jet pump after the condenser, can greatly increase the degree of vacuum in the condenser, thereby facilitating the reduction of the required requirements under the premise of ensuring the normal operation of the turbine.
  • Condensation vacuum reduces the cooling requirements for subsequent cooling towers, greatly reduces the amount of water and heat discharged from the cooling tower, saves resources and energy, and avoids the use of jet pumps to recover vacuum steam generated by vacuum equipment.
  • the power consumption is high, and the implementation is difficult.
  • the condensate in the condenser is directly or indirectly injected into the primary and secondary or secondary jet pumps as a jet medium to pump the vacuum vapor in the condenser, not only the consumption of the jet is saved.
  • the power is also fully mixed with the vacuum medium sucked from the condenser and the jet medium in the jet pump and the recovery tank, so that the vacuum steam is quickly condensed, and the heat released by the vacuum condensation is used to recover the water in the tank. (or called jet medium) is heated to increase the temperature of the recovered water (normally, it can reach about 100 °C under normal pressure, and can usually reach 120 °C after being pressurized by high-pressure pump), effectively reducing the entry into multiple stages.
  • FIG. 1 is a schematic view of a prior art steam turbine vacuum recovery system
  • FIG. 2 is a schematic structural view of a steam turbine vacuum stripping and pressure-recovering system of the present invention
  • Figure 3 is a schematic structural view of a primary jet pump of the present invention.
  • Figure 4 is a schematic structural view of a secondary jet pump of the present invention.
  • Figure 5 is a schematic view showing the structure of another secondary jet pump of the present invention.
  • the present invention provides a steam turbine vacuum stripping temperature lifting and reusing system, comprising a condenser 2 and a deaerator 16, wherein the condenser is provided with an outlet pipe.
  • the steam vacuum stripping and pressure recovery system of the steam turbine further comprises a recovery tank 1, a first-stage jet pump 5 and a secondary jet pump 6, wherein the secondary jet pump is preferably provided with two-stage supercharging a vertical jet pump, axially vertically downward, above the recovery tank, the recovery tank being provided with a return water conduit 7 for draining and a jet conduit 8 for forming a jet, the jet conduit and back
  • the water pipe is connected to the water outlet area of the recovery tank by the same drainage main pipe or the water discharge pipe of the recovery tank, and the water discharge pipe of the water storage area independently connected to the recovery tank is provided with high-pressure drain pumps 9 and 9'
  • the return water pipe independently connected to the water discharge area of the recovery tank is provided with a reuse drain pump, and the jet inlets of the primary jet pump and the secondary jet pump are connected to the outlet pipe of the condenser through a pipeline and/or Or the jet conduit, the first-stage jet a suction inlet of the pump is connected to the exhaust pipe of the condens
  • the pressure in the first-stage jet pump is preferably not less than 0.5 MPa to facilitate the suction of vacuum steam and the maintenance of vacuum.
  • a cut-off width may be set on the outlet pipe of the condenser to facilitate control of the direction of the medium in the pipeline.
  • the water return pipe is provided with a drainage control or cut-off width 1 3 and is connected to the water inlet of the deaerator, and the recovery tank is provided with a sensing device 14 for collecting the water level signal thereof, the sensing device
  • the signal output end is connected to a control device 15, the control device operates according to a preset program or control parameter, and the control signal output end is connected to the drain control or cuts off the wide control line, so as to be based on the water level in the recovery tank
  • the drainage is controlled so that the water level in the recovery tank is maintained within a certain range.
  • the secondary jet pump is preferably a multi-stage multi-tube jet pump to create sufficient pressure to ensure that the spent steam (steam-liquid mixture) is fed to the recovery tank and sufficient pressure is created in the recovery tank.
  • the secondary jet pump generally adopts two stages of pressurization, and is provided with a first-stage jet tube and a second-stage jet tube, and the inlets of the first-stage jet tube and the second-stage jet tube constitute an inlet of the second-stage jet pump, wherein one stage
  • the jet of the jet tube is used for the pressurized delivery of the inlet pumped medium stream
  • the jet of the secondary jet tube is used for the pressurized transport of the medium stream of the first stage jet tube boost output.
  • the number of the first-stage jet tubes is plural, thereby dividing the inlet by the pumping medium flow into multiple paths, so as to reduce the suction flow rate of each of the first-stage jet tubes, so as to effectively increase the jet flow at a large flow rate.
  • the pump head provides the possibility.
  • the number of the two-stage jet tubes is plural, and the outlets thereof are evenly distributed on one section of the secondary jet pump to overcome the defect that the single jet tube can absorb less flow, ensuring a large flow occasion. Effective use under.
  • Figure 4 provides an embodiment of a secondary jet pump having a pump body in a vertical tubular shape with a plurality of suction tubes 61, said suction tubes being rotationally symmetrically distributed, each suction
  • the inlet of the tube constitutes a suction inlet of the secondary jet pump
  • the inlet of each suction tube may be connected to the outlet of the primary jet pump or may be connected to a main suction tube
  • the primary suction tube being connected to the first stage
  • An outlet of the jet pump the suction pipe extends through the side wall of the pump body into the pump body, the portion of the pump body extending downwardly and downwardly
  • the outlet section 62 is a straight pipe along the axial direction of the pump body
  • the number of suction pipes is usually plural and uniform along the circumference at the same height The distribution can also be one if the suction flow rate is small.
  • the secondary jet pump is provided with a first-stage jet tube 63 and a secondary jet tube 64.
  • the second-stage jet tube extends through the rear end surface of the pump body into the pump body, and an outlet thereof is located above the outlet of the suction tube.
  • the primary jet tube penetrates the suction tube outside the pump and extends in the direction of the suction tube axis to the outlet section of the suction tube, the outlet of which is located within the outlet end of the suction tube.
  • the pumped medium stream from the primary jet pump first enters the suction tube of the secondary jet pump, the primary jet tube ejects a primary jet within the suction tube, creating a negative pressure within the suction tube for suction
  • the medium flows forward under the action of the negative pressure, and is mixed with the jet emitted from the first-stage jet tube, and the secondary jet tube forms a negative pressure (relatively) in the pump body, and drives the suction of the jet which is ejected by the first-stage jet tube.
  • Forming a mixed medium flow, and the secondary jet tube forms a negative pressure zone in the pump body to drive the flow of the mixed medium in the suction pipe.
  • Figure 5 shows another embodiment of the secondary jet pump.
  • the main body portion of the pump body of the secondary jet pump has a vertical tubular shape, and the rear portion has a curved shape 65.
  • the outer port of the elbow constitutes the suction inlet of the secondary jet pump, thereby facilitating the connection of the secondary jet pump to the relevant pipeline, and also ensuring that the suction inlet passage of the secondary jet pump is exactly the first-stage jet
  • the secondary jet pump is provided with a first-stage jet tube 63 and a second-stage jet tube 64.
  • the first-stage jet tube is worn from the rear of the secondary jet pump along the axis of the pump body of the secondary jet pump.
  • the inner cavity of the secondary jet pump is provided with an extension in the pump body of the secondary jet pump, the first-stage jet tube extension is straight tubular, and the first-stage jet tube extension is preferably along the second
  • the stage jet pump extends in the axial direction and at its end is its outlet (i.e., the primary jet medium outlet) from which the primary jet medium is ejected outwardly to form a tapered spray region in the interior of the pump body.
  • the first-stage jet medium outlet may be provided as a tapered port to optimize the jet flow direction, and the first-stage jet medium outlet direction should be directed toward the direction of the medium flow in the pump body of the secondary jet pump, and the secondary jet tube may be Providing a secondary jet tube extension extending into the pump body of the secondary jet pump, the secondary jet tube extension preferably being provided with a bend, and after bending, is provided with the pump body of the secondary jet pump a straight tubular shape having the same axial direction and a secondary jet medium outlet at the end, the secondary jet medium outlet being provided as a tapered opening for better formation of a desired jet, the secondary jet medium outlet
  • the direction (the opening direction of the outlet of the secondary jet tube) is preferably directed toward the direction of the medium flow in the pump body of the secondary jet pump, the outlet of the secondary jet tube preferably being located in the injection region of the outlet of the primary jet tube, To increase the suction of the secondary jet.
  • the secondary jet pump is preferably a vertical jet pump, the jet and the mixed mixed medium flow from top to bottom, to obtain better suction effect by utilizing the potential energy of the medium, especially for industrial applications, due to lack of Steam and mixing
  • the flow rate of the combined medium is large, so the height of the jet pump tends to be several meters or even higher, thereby significantly increasing the pressure head of the jet pump and greatly reducing power consumption.
  • the number of the secondary jet tubes of the secondary jet pump may be one or several.
  • the plurality of secondary jet tubes may be uniformly connected to the secondary On the same circumference of the radial direction of the jet pump, or the secondary jet tube is provided with a plurality of secondary jet tube branches, one end of the plurality of the second-stage jet tube branches is connected to the second-stage jet tube, and One end is evenly connected to the same circumference in the radial direction of the secondary jet pump, and the outlet of the secondary jet tube is evenly distributed on a section of the medium passage in the pump body of the secondary jet pump,
  • the arrangement of several secondary jet tubes or secondary jet tube branches of the secondary jet pump can more effectively pressurize the pumped medium from the primary jet pump, so that the pumped medium can enter more smoothly. Recycling tanks.
  • the suction pipe of the secondary jet pump is arranged as a plurality of uniformly distributed pipes, and the large flow medium flow can be decomposed into a plurality of relatively small flow medium flows, and the first-stage jet pipe is respectively sucked in each suction pipe.
  • the supercharging method solves the defect that the ordinary jet pump has a small suction flow rate and cannot pressurize the large flow medium, effectively realizes the supercharging of the large flow medium flow, and simultaneously pressurizes the secondary flow tube in the pump body.
  • the function of forming a stable and reliable pressurized medium flow is beneficial to improving the state of the medium flow in the pump body and the recovery tank of the secondary jet pump, and ensuring that the medium flow smoothly enters the recovery tank.
  • the primary jet pump is preferably a tubular jet pump, the main body portion of which is tubular, and the inlet of the tubular pump body Forming a suction inlet 51 of the primary jet pump, the outlet forming an outlet 52 of the primary jet pump, the primary jet pump jet conduit extending through the side wall of the pump body, extending into the pump body, and the jet distribution in the pump body a tube connection, the jet distribution tube comprising an extension 53 coaxial with the first-stage jet pump jet conduit, the extension being located on a cross section of the pump body, extending in a radial direction of the pump body, the end portion Closed or sealedly connected to the inner wall of the pump body, the extension section is provided with a plurality of jet ports or jet tubes 54, and the extension section may be provided with one or more cross tubes 55 communicating with the
  • the cross tube is also provided with a plurality of jet ports or jet tubes, which form part
  • the inner diameter ratio of the jet tube to the extension or cross tube may generally be no more than 1:5, preferably no more than 1:10, such as 1:10, 1:12, 1:15, 1:18, 1:20 Or 1:30 to the extension and cross
  • the pressure is uniformly equalized in the tube to ensure that the pressure of each jet tube and the outlet flow rate are substantially balanced, and that the jet has a sufficiently high flow rate, thereby improving the suction force and the suction effect on the suctioned medium, and improving the condenser
  • the flow state of the medium in the exhaust pipe reduces turbulence and power consumption.
  • the jet medium outlet may be provided as a tapered outlet for better jet formation.
  • the diameter of the jet distribution tube is preferably greater than 1 or more times the diameter of the injection port (the jet medium outlet or the injection port on the injection tube), whereby the medium flow rate in the jet distribution tube can be effectively reduced Maintaining or restoring the static pressure of the medium, which is beneficial to maintain the pressure, flow rate and flow balance of each injection port, and is beneficial to the stability of the medium flow inside the jet distribution tube, reducing turbulence and resistance, and helping to reduce cavitation. , prolong the service life of the jet distribution tube.
  • a plurality of evenly distributed jets are formed in the pump body of the primary jet pump, and a negative pressure region is formed on the entire medium passage to drive the forward steam from the inlet end of the pump body to flow forward.
  • the pipeline type jet pump is especially suitable for driving a large flow medium flow in a large diameter pipe, and overcomes the problem that the conventional common jet pump is difficult to solve under large diameter pipe due to small medium flow rate and power consumption. Defects in media fluidity.
  • the vacuum steam is difficult to press, and in the steam turbine system, the diameter of the vacuum steam exhaust pipe is about lm ⁇ 2m, because the vacuum steam pressure transmitted by it is too small to transmit, the first-stage jet pump
  • the setting effectively improves the flow speed of the vacuum steam in the exhaust pipe, and solves the technical problem that the vacuum steam is difficult to recover due to the large diameter of the pipe and the low vacuum pressure in the conveying pipe, and can also be the secondary jet.
  • the pump provides a relatively high pressure pumped medium that helps to increase the suction of the secondary jet pump.
  • the vacuum steam temperature in the exhaust pipe of the condenser is about 30 ° C ⁇ 50 ° C, and the temperature of the mixed medium in the suction pipe can generally rise after being sucked by the first-stage jet pump.
  • the temperature and pressure of the vacuum steam are increased from 40 °C to 70 °C.
  • the recovery tank is preferably a vertical recovery tank having a vertical dimension greater than its lateral dimension.
  • the vertical recovery tank has a circular cross section and its height is preferably greater than one or more times the diameter of the cross section.
  • the recovery tank is in a closed state, and the internal gas phase pressure can be generally about one standard atmospheric pressure, so as to facilitate the transportation of the secondary jet pump to the medium in the recovery tank and the condensation of the vacuum vapor in the recovery tank, and the internal condensed water temperature is 100.
  • the internal gas phase pressure can be generally about one standard atmospheric pressure, so as to facilitate the transportation of the secondary jet pump to the medium in the recovery tank and the condensation of the vacuum vapor in the recovery tank, and the internal condensed water temperature is 100.
  • Around °C thereby avoiding excessive power consumption, forming high-temperature condensate suitable for the boiler deaerator, and directly returning to the deaerator of the steam turbine power generation system.
  • the selection of the vertical recovery tank can increase the pressure of the drainage by the height of the tank itself or the height of the condensed water surface of the tank body, so as to reduce the power consumption of the drainage.
  • the scale is particularly obvious.
  • the number of the recovery tanks may be set to several, and the number of the first-stage jet pump and the secondary jet pump is the same as the number of the recovery tanks. And - corresponding to the setting, ⁇ use the parallel way to jointly recycle and reuse the water and heat energy of the vacuum steam.
  • the return water pipes of the plurality of recovery tanks may be respectively connected to the condensed water recovery source, or may be connected to the same main return water pipeline, and the main drainage pipeline is connected to the condensed water recovery source, and when the setting is used,
  • Each of the pipes connected to the primary jet pump and/or the secondary jet pump may be provided with the same number of branch pipes as the recovery canister and connected to a corresponding jet pump.
  • the recovery tank may be provided with a safety fence 11 and an exhaust valve 12, which may be respectively installed on the top of the recovery tank,
  • the exhaust valve can periodically discharge non-condensable gas that cannot form condensed water, so as to avoid occupying excessive space of the recovery tank, and the safety can be automatically relieved after the pressure in the recovery tank exceeds a certain limit.
  • the outlet of the recovery tank is preferably disposed at the bottom of the recovery tank, thereby ensuring that condensed water is discharged from the outlet of the recovery tank, and the temperature of the condensed water pressurized by the return water pipeline can reach 80 ° C ⁇ 120 ° C, more favorable for secondary use, the number of high-pressure drainage pumps can be two for one or two, or more than two for a multi-purpose.
  • Each of the pipes involved in the present invention may be provided with a suitable wide door for convenient control, and a pressure gauge may be provided as needed to adjust according to the displayed pressure.
  • each pipe involved in the present invention can be appropriately selected according to the size of the jet pump and the recovery tank and the engineering needs, and the pipes can be used with equal diameter pipes to facilitate the processing, or at least one of the unequal diameter pipes.
  • the pipes and the pipes and the jet pump may be connected by welding, sequentially injection molding or other suitable manner, and the connection of any pipe body through the other pipe body or the pump body of the jet pump is Sealed connection.
  • the negative pressure of the present specification may be less than atmospheric pressure or greater than atmospheric pressure with respect to the original pressure of the pumped medium involved in the negative pressure.

Abstract

A turbine vacuum steam heating and pressurizing reuse system comprising a condenser (2), a recycling canister (1), a first-level jet pump (5), and a second-level jet pump (6). A jet pipe (8) and a reuse water pipe (7) are arranged on the recycling canister (1), wherein the jet pipe (8) has arranged thereon a high-pressure drainage pump (9, and 9'), and the reuse water pipe (7) has arranged thereon a reuse drainage pump. Jet inlets of the first-level jet pump (5) and of the second-level jet pump (6) are connected via a pipe to a water outlet pipe and/or a jet pipe (8) of the condenser. A suction inlet of the first-level jet pump (5) is connected to a steam discharge pipe of the condenser (2). The suction inlet of the second-level pump (6) is connected to an outlet of the first-level pump (5). An outlet of the second-level pump is connected to an inlet of the recycling canister (1). The reuse water pipe (7) is connected to a water-inlet of a deaerator (16). The apparatus allows the vacuum steam and the condensation water formed after cooling by the condenser (2) to be pumped into the recycling canister (1) via the jet pump, then, after being heated, to be sent into the deaerator for reuse, thus allowing recycling and reuse of the water resource and heat in the vacuum steam.

Description

说 明 书  Description
汽轮机真空汽提温提压回用系统 技术领域  Steam turbine vacuum stripping temperature lifting and reusing system
本发明涉及一种汽轮机真空汽回用系统, 用于汽轮机排放的真空汽的回收再 利用。  The invention relates to a steam turbine vacuum recovery system for recycling and recycling vacuum steam discharged from a steam turbine.
背景技术 Background technique
参见图 1 , 现有技术中的汽轮机真空汽回收系统主要是釆用真空如汽轮机 1、 凝汽器 2、 除氧器 6和冷却塔 3构成的汽 -水循环系统来实现真空汽中水资源的回 收利用和废热的排放, 釆用此种汽轮机真空汽回收系统虽然可以回收部分真空汽 进行再利用, 但尚有很大一部分真空汽直接或间接地排放到大气中, 浪费大量热 能的同时还造成了环境的热污染。 尽管在有些系统中对真空汽设备产生的真空汽 进行了回收, 但由于真空汽压力低, 其在管道内不易流动, 使得真空汽的回收速 率有限, 系统的工作效率不高。  Referring to Fig. 1, the prior art steam turbine vacuum recovery system mainly uses a steam-water circulation system composed of a vacuum such as a steam turbine 1, a condenser 2, a deaerator 6 and a cooling tower 3 to realize water vapor in the steam. Recycling and waste heat discharge. Although this type of steam turbine vacuum recovery system can recover part of vacuum steam for reuse, a large part of vacuum steam is directly or indirectly discharged into the atmosphere, which wastes a lot of heat energy. The thermal pollution of the environment. Although the vacuum steam generated by the vacuum steam plant is recovered in some systems, since the vacuum steam pressure is low, it is not easy to flow in the pipe, so that the recovery rate of the vacuum steam is limited, and the working efficiency of the system is not high.
发明内容 Summary of the invention
为克服现有技术的上述缺陷, 本发明的目的在于提供一种汽轮机真空汽提温 提压回用系统, 能够在不影响真空设备工作的情况下, 将真空汽中的水资源和热 能进行提温提压后回收利用。  In order to overcome the above-mentioned drawbacks of the prior art, the object of the present invention is to provide a steam turbine vacuum stripping temperature lifting and reusing system, which can improve water resources and heat energy in vacuum steam without affecting the operation of the vacuum equipment. Recycled after warming.
本发明实现上述目的所釆用的技术方案是:  The technical solution adopted by the present invention to achieve the above object is:
一种汽轮机真空汽提温提压回用系统, 包括凝汽器, 还包括回收罐、 一級射 流泵和二級射流泵, 所述回收罐设有射流管道和回用水管道, 所述射流管道和回 用水管道通过同一个排水总管或者各自独立地连接所述回收罐的储水区域, 所述 排水总管或者所述独立连接所述回收罐的储水区域的射流管道上设有高压排水 泵, 所述独立连接所述回收罐的储水区域的回用水管道上设有回用排水泵, 所述 一級射流泵和二級射流泵的射流入口通过管道连接所述凝汽器的出水管和 /或所 述射流管道, 所述一級射流泵的抽吸入口连接所述凝汽器的排汽管, 所述二級射 流泵的抽吸入口连接所述一級射流泵的出口, 所述二級射流泵的出口连接所述回 收罐的入口。  A steam turbine vacuum stripping temperature lifting and recycling system, comprising a condenser, further comprising a recovery tank, a first-stage jet pump and a secondary jet pump, wherein the recovery tank is provided with a jet pipeline and a return water pipeline, the jet pipeline and The water return pipe is connected to the water storage area of the recovery tank through the same drainage main pipe or each of the water storage areas of the recovery tank, and the high pressure drainage pump is arranged on the discharge pipe of the water storage area independently connected to the recovery tank. a return water pump is disposed on the water return pipe independently connected to the water storage area of the recovery tank, and the jet inlets of the primary jet pump and the secondary jet pump are connected to the outlet pipe of the condenser through a pipeline and/or a jet pipe, a suction inlet of the primary jet pump is connected to an exhaust pipe of the condenser, and a suction inlet of the secondary jet pump is connected to an outlet of the primary jet pump, the secondary jet pump The outlet is connected to the inlet of the recovery tank.
所述一級射流泵优选为管道式射流泵, 所述二級射流泵优选为多級射流泵, 所述回收罐为立式回收罐。 The primary jet pump is preferably a tubular jet pump, and the secondary jet pump is preferably a multi-stage jet pump. The recovery tank is a vertical recovery tank.
所述二級射流泵可以为设有两级增压的立式的射流泵, 可以设有一級射流管 和二級射流管, 所述一級射流管和二級射流管的进口均构成所述二級射流泵的射 流入口, 所述一級射流管的射流用于为从所述二级射流泵的抽吸入口进入的介质 流增压, 所述二級射流管的射流用于为经所述一級射流管增压后的介质流的增压。  The secondary jet pump may be a vertical jet pump provided with two stages of pressurization, and may be provided with a first-stage jet tube and a second-stage jet tube, and the inlets of the first-stage jet tube and the second-stage jet tube constitute the second a jet inlet of a stage jet pump, the jet of the primary jet tube being used to pressurize a medium flow entering from a suction inlet of the secondary jet pump, the jet of the secondary jet tube being used for the first stage The pressurization of the medium flow after the jet tube is pressurized.
所述一級射流管的数量和 /或所述二級射流管的数量可以为一个或多个, 在所 述一級射流管的数量为多个时, 所述二級射流泵的抽吸入口可以分为多路, 每一 个所述的一級射流管为从与其对应的一路所述二級射流泵的抽吸入口进入的介质 流增压, 所述二級射流管的数量为多个时, 所述多个二級射流管的出口可以均衡 地分布在所述二級射流泵的泵体的介质通道一个截面上。  The number of the first-stage jet tubes and/or the number of the second-stage jet tubes may be one or more. When the number of the first-stage jet tubes is plural, the suction inlets of the second-stage jet pumps may be divided into In the case of multiple paths, each of the first-stage jet tubes is pressurized from a medium flow entering from a suction inlet of the corresponding two-stage jet pump corresponding thereto, and when the number of the two-stage flow tubes is plural, The outlets of the plurality of secondary jet tubes may be evenly distributed over a section of the medium passage of the pump body of the secondary jet pump.
所述二級射流泵的泵体优选呈立式的管状, 设有多个抽吸管, 所述各抽吸管 可以旋转对称分布, 各抽吸管的入口构成所述二級射流泵的抽吸入口, 所述抽吸 管可以穿过泵体的侧壁延伸到泵体内, 其位于泵体内的部分设有向下的折弯, 位 于所述折弯下方的抽吸管可以呈与所述二級射流泵的泵体的轴线方向相同的直管 状, 所述二級射流管可以穿过所述二級射流泵的泵体的后端面延伸到所述泵体内, 其出口可以位于所述各抽吸管的出口的上方并使所述各抽吸管的出口位于其射流 的喷射区域内, 所述一級射流管可以在泵体外穿入所述抽吸管并沿所述抽吸管的 延伸方向一直延伸至所述抽吸管的出口段, 其出口可以位于所述抽吸管的出口的 里侧, 其射流喷射区域沿抽吸管的轴向逐渐扩张至所述抽吸管内的整个截面。  The pump body of the secondary jet pump is preferably in a vertical tubular shape, and is provided with a plurality of suction pipes, the suction pipes can be rotationally symmetrically distributed, and the inlets of the suction pipes constitute the pumping of the secondary jet pump. a suction port, the suction pipe may extend through the side wall of the pump body into the pump body, and a portion of the pump body is provided with a downward bend, and a suction pipe located below the bend may be The pump body of the secondary jet pump has a straight tubular shape with the same axial direction, and the secondary jet tube can extend through the rear end surface of the pump body of the secondary jet pump to the pump body, and the outlet thereof can be located at the respective Above the outlet of the suction pipe and the outlet of the respective suction pipe is located in the injection region of its jet, the primary jet can penetrate the suction pipe outside the pump and extend along the suction pipe The direction extends all the way to the outlet section of the suction pipe, the outlet of which can be located on the inner side of the outlet of the suction pipe, the jet injection zone gradually expanding in the axial direction of the suction pipe to the entire section in the suction pipe .
优选所述二級射流泵的泵体的主体部分呈立式的管状, 后部呈弯头状, 所述 弯头的外端构成所述二級射流泵的抽吸入口, 所述一級射流管可以沿所述二級射 流泵的泵体的轴线从所述二級射流泵的后部穿入所述二級射流泵的内腔, 设有位 于所述二級射流泵的泵体内的一級射流管延伸段, 所述一級射流管延伸段优选呈 直管状, 所述二級射流管可以从所述二級射流泵的泵体的侧壁穿入所述二級射流 泵的泵体内, 其位于所述二級射流泵的泵体内的部分设有折弯, 折弯后优选呈与 所述二級射流泵的泵体的轴线方向相同的直管状, 所述二級射流管的出口位于所 述一級射流管的出口的喷射区域内。  Preferably, the main body portion of the pump body of the secondary jet pump has a vertical tubular shape, the rear portion is elbow-shaped, and the outer end of the elbow constitutes a suction inlet of the secondary jet pump, the first-stage jet tube An inner cavity of the secondary jet pump may be inserted from a rear portion of the secondary jet pump along an axis of the pump body of the secondary jet pump, and a first-stage jet disposed in the pump body of the secondary jet pump a tube extension, the first-stage jet tube extending portion preferably having a straight tubular shape, the secondary jet tube may penetrate from a side wall of the pump body of the secondary jet pump into a pump body of the secondary jet pump, which is located a portion of the pump body of the secondary jet pump is provided with a bend, preferably after being bent, in a straight tubular shape which is the same as the axial direction of the pump body of the secondary jet pump, and the outlet of the secondary jet tube is located at the Within the injection zone of the outlet of the primary jet tube.
所述一級射流泵的泵体的主体部分优选呈管状, 所述管状泵体的进口构成所 述一級射流泵的抽吸入口, 出口构成所述一級射流泵的出口, 所述一級射流泵的 射流管可以设有位于所述泵体内的射流口或射流管, 所述射流口或射流管的数量 可以为多个, 分布在所述管状泵体的同一个横截面上或者多个不同的横截面上, 并朝向所述泵体的轴线延伸方向。 The main body portion of the pump body of the primary jet pump is preferably tubular, the inlet of the tubular pump body constitutes a suction inlet of the primary jet pump, and the outlet constitutes an outlet of the primary jet pump, the primary jet pump The jet tube may be provided with a jet port or a jet tube located in the pump body, and the number of the jet port or the jet tube may be plural, distributed on the same cross section of the tubular pump body or a plurality of different cross tubes. In the section, and extending toward the axis of the pump body.
所述一級射流泵射流管道可以穿过所述泵体的侧壁, 与位于所述泵体内的射 流分布管连接, 所述射流分布管包括与所述一級射流泵射流管道同轴的延伸段, 所述延伸段可以设有或者不设与其连通的交叉管, 所述延伸段和交叉管的端口封 闭, 所述延伸段和交叉管上可以设有多个射流口或者射流管, 所述各射流口或射 流管在所述延伸段和交叉管上均衡分布。  The first-stage jet pump jet pipe may pass through a sidewall of the pump body and be connected to a jet distribution tube located in the pump body, the jet distribution tube including an extension coaxial with the first-stage jet pump jet pipe. The extension section may or may not be provided with an intersecting tube, the extension section and the port of the cross tube are closed, and the extension section and the cross tube may be provided with a plurality of jet ports or jet tubes, and the jets may be provided. The mouth or jet tube is evenly distributed over the extension and the cross tube.
所述回收罐还可以设有安全阀和排气阀, 所述安全阀和排气阀优选分别安装 在所述回收罐的顶部, 所述回收罐上用于连接所述排水总管或所述各自独立地连 接所述回收罐的储水区域的射流管道和回用水管道的凝结水出口优选设置在所述 回收罐的底部,所述高压排水泵的数量优选是一用一备的两个或多用一备的多于 1 个。  The recovery tank may further be provided with a safety valve and an exhaust valve, which are preferably respectively installed at the top of the recovery tank, the recovery tank being used for connecting the drainage main pipe or the respective A condensate outlet for independently connecting the water conduit of the recovery tank and a condensate outlet for the return water conduit is preferably disposed at the bottom of the recovery tank, and the number of the high pressure drain pumps is preferably two or more for one use. More than one.
所述回用水管道上通常可以设有排水控制或切断阔, 可以连接锅炉系统的除 氧器的进水口, 由此实现凝结水和热量在现有汽轮机发电系统中的直接回用。  The return water pipe can usually be provided with drainage control or cutting width, which can be connected to the water inlet of the deaerator of the boiler system, thereby realizing direct reuse of the condensed water and heat in the existing steam turbine power generation system.
所述回收罐可以设有用于釆集其水位信号的传感装置, 所述传感装置的信号 输出端连接一个控制装置, 所述控制装置的控制信号输出端连接所述排水控制或 切断阔的控制线路, 由此实现对回收罐排水的控制, 保持回收罐内的工作压力。  The recovery tank may be provided with a sensing device for collecting its water level signal, the signal output end of the sensing device is connected to a control device, and the control signal output end of the control device is connected to the drainage control or cuts off the wide Control the line, thereby achieving control of the drain of the recovery tank and maintaining the working pressure in the recovery tank.
所述回收罐的数量可以为若干个, 所述一級射流泵和二級射流泵的数量与所 述回收罐的数量相同, 并与其——对应设置。  The number of the recovery tanks may be several, and the number of the primary jet pumps and the secondary jet pumps is the same as the number of the recovery tanks, and is correspondingly set.
本发明与现有技术相比的有益效果是:  The beneficial effects of the present invention compared to the prior art are:
1、 本发明釆用了不同结构的两級射流泵相互配合, 通过一級射流泵解决大管 径管道内的真空汽流动性问题, 通过二級射流泵将真空汽和凝结水送入回收罐回 收, 由此克服了现有技术下难以提高大管径下真空汽的回收效率的技术问题, 由 于流体介质的特性, 本发明釆用的这种技术手段相对于将相同的多个射流泵串联 或并联, 在同样的流量和增压幅度下, 可以明显地减少动力消耗, 简化系统的总 体构成。 根据申请人的实验, 釆用本发明所限定的两級射流泵配合方式, 相对于 釆用由多个普通射流泵串并联组合方式 (根据流量分为两条支路、 根据增压幅度 每条支路上串联两个射流泵), 在流量和回收效率相等的情况下, 动力消耗减少约 2、 管道式的一級射流泵的引入, 有效地提高了真空汽在凝汽器的排汽管中的 流动速度, 即提高了真空汽的供给量, 为回收罐提供了足够的真空汽, 解决了现 有技术中真空汽在运送管道(直径 lm ~ 2m ) 中由于管径较大且真空汽压力低造成 的流速过慢而导致的回收难的技术问题, 同时为二級射流泵提供了压力相对较高 的被抽吸介质, 有助于提高二級射流泵的抽吸效果; 一級射流泵的射流分布管的 设置, 在一級射流泵的泵体内形成了均衡分布的多股射流, 在整个介质通道上形 成负压区域, 带动来自泵体进口端的乏汽向前流动, 克服了现有普通射流泵因抽 吸的介质流量小、 动力消耗大而在大管径管道下难以解决介质流动性的缺陷。 1. The invention adopts two-stage jet pumps with different structures to cooperate with each other, solves the problem of vacuum vapority in the large-diameter pipe through the first-stage jet pump, and sends the vacuum steam and the condensed water to the recovery tank through the secondary jet pump. Therefore, the technical problem that it is difficult to improve the recovery efficiency of the vacuum steam under the large diameter is overcome by the prior art. Due to the characteristics of the fluid medium, the technical means used in the present invention are connected in series with the same plurality of jet pumps or Parallel, at the same flow rate and boost amplitude, can significantly reduce power consumption and simplify the overall composition of the system. According to the applicant's experiment, the two-stage jet pump matching method defined by the present invention is combined with a plurality of common jet pumps in series and parallel mode according to the enthalpy (two branches according to the flow rate, each according to the pressure increase range) Two jet pumps are connected in series on the branch road. When the flow rate and recovery efficiency are equal, the power consumption is reduced by about 2. The introduction of the pipeline-type first-stage jet pump effectively increases the flow velocity of the vacuum steam in the exhaust pipe of the condenser, that is, increases the supply of vacuum steam, and provides sufficient vacuum steam for the recovery tank to solve In the prior art, the vacuum steam in the conveying pipe (diameter lm ~ 2m) is difficult to recover due to the large diameter of the pipe and the low flow velocity caused by the low vacuum pressure, and the pressure of the secondary jet pump is also provided. The relatively high suctioned medium helps to increase the suction effect of the secondary jet pump; the jet distribution tube of the primary jet pump is arranged to form a balanced distribution of multiple jets in the pump body of the primary jet pump, throughout A negative pressure region is formed on the medium passage to drive the forward flow from the inlet end of the pump body, which overcomes the difficulty of solving the medium fluidity under the large diameter pipe due to the small medium flow rate and power consumption of the conventional common jet pump. Defects.
3、 真空汽经过一級射流泵的增压之后其压力有所提高, 有利于二級射流泵的 抽吸, 二級射流泵的多个抽吸入口的设置, 可以更加有效地对来自一級射流泵的 被抽吸介质进行增压, 使被抽吸介质可以更顺利地进入回收罐。  3. After the vacuum steam is pressurized by the first-stage jet pump, the pressure is increased, which is beneficial to the suction of the secondary jet pump. The multiple suction inlets of the secondary jet pump can be set more effectively from the first-stage jet pump. The pressurized medium is pressurized to allow the pumped medium to enter the recovery tank more smoothly.
4、 由于二級射流泵釆用立式射流泵设置于回收罐的上方, 二級射流泵内的介 质 (水或汽 +水混合物) 的流向垂直向下, 充分地利用水的位能并结合介质自上向 下流动形成的动能有效地提高了二級射流泵的抽吸力和抽吸效果。  4. Since the secondary jet pump is placed above the recovery tank with a vertical jet pump, the flow of the medium (water or steam + water mixture) in the secondary jet pump is vertically downward, and the potential energy of the water is fully utilized and combined. The kinetic energy of the medium flowing from top to bottom effectively increases the suction and suction effects of the secondary jet pump.
5、 通过一級射流泵和二級射流泵将凝汽器中的真空汽抽吸到回收罐中, 并在 回收罐中将其转化为能够回用的高温高压水, 不仅有效地利用了汽轮机排放的真 空汽, 而且通过在凝汽器后增加了射流泵的抽吸效果, 可以大幅度地提高凝汽器 内的真空度, 由此在保证汽轮机正常运行的前提下, 有利于降低所需的凝汽真空 度, 降低对后续冷却塔的冷却要求, 大幅度降低了冷却塔排放的水量和热量, 有 利于节省资源和能源, 同时也避免了单独使用射流泵回收真空汽设备产生的真空 汽所带来的动力消耗大、 实施困难等缺陷。  5. The vacuum steam in the condenser is sucked into the recovery tank by the primary jet pump and the secondary jet pump, and converted into high-temperature and high-pressure water that can be reused in the recovery tank, which not only effectively utilizes the turbine discharge The vacuum steam, and by increasing the suction effect of the jet pump after the condenser, can greatly increase the degree of vacuum in the condenser, thereby facilitating the reduction of the required requirements under the premise of ensuring the normal operation of the turbine. Condensation vacuum reduces the cooling requirements for subsequent cooling towers, greatly reduces the amount of water and heat discharged from the cooling tower, saves resources and energy, and avoids the use of jet pumps to recover vacuum steam generated by vacuum equipment. The power consumption is high, and the implementation is difficult.
6、 由于将凝汽器内的凝结水直接或间接地 I入一级和 I或二级射流泵中作为 射流介质对凝汽器内的真空汽进行抽吸, 不仅节约了射流所需消耗的动力, 还利 用从凝汽器内抽吸出的真空汽与射流介质在射流泵及回收罐内的充分混合, 使真 空汽迅速凝结, 并利用真空汽凝结所释放的热量对回收罐内的水(或称为射流介 质)进行了加热, 提高了回收水的温度(常压下通常能达到 100 °C左右, 经高压泵 加压后通常能达到 120 °C左右), 有效减少了进入多級加热器或除氧器的凝结水再 次加热到饱和温度所需要吸收的热量, 实现了对真空汽中的水资源和热能的回收 利用, 达到了节约能源和保护环境的目的, 同时还给企业带来了直接的经济效益。 7、 由于回收罐内的水由凝汽器中的真空汽凝结而成, 水的含盐量低, 由于整 体回用过程均在封闭系统内进行, 水的含氧量低, 由于回收过程中汽水相变过程 中释放了热量, 水的温度高, 因此釆用本发明回收的凝结水可以更好地适应于锅 炉用水要求, 通过将其送入除氧器进行回用, 可以明显地减少锅炉用水的处理成 本, 不仅减少了热能和水资源的浪费, 而且还具有明显地经济效益。 6. Since the condensate in the condenser is directly or indirectly injected into the primary and secondary or secondary jet pumps as a jet medium to pump the vacuum vapor in the condenser, not only the consumption of the jet is saved. The power is also fully mixed with the vacuum medium sucked from the condenser and the jet medium in the jet pump and the recovery tank, so that the vacuum steam is quickly condensed, and the heat released by the vacuum condensation is used to recover the water in the tank. (or called jet medium) is heated to increase the temperature of the recovered water (normally, it can reach about 100 °C under normal pressure, and can usually reach 120 °C after being pressurized by high-pressure pump), effectively reducing the entry into multiple stages. The heat that the condensate of the heater or deaerator is heated to the saturation temperature to recover the water and heat energy in the vacuum steam The use of energy conservation and environmental protection has also brought direct economic benefits to enterprises. 7. Since the water in the recovery tank is condensed by the vacuum steam in the condenser, the salt content of the water is low. Since the overall recycling process is carried out in the closed system, the oxygen content of the water is low due to the recovery process. The heat is released during the steam-water phase transition, and the temperature of the water is high. Therefore, the condensed water recovered by the present invention can be better adapted to the boiler water requirement, and can be significantly reduced by feeding it to the deaerator for reuse. The cost of water treatment not only reduces the waste of heat and water resources, but also has obvious economic benefits.
附图说明 DRAWINGS
图 1为现有技术的汽轮机真空汽回用系统示意图;  1 is a schematic view of a prior art steam turbine vacuum recovery system;
图 2为本发明的汽轮机真空汽提温提压回用系统结构示意图;  2 is a schematic structural view of a steam turbine vacuum stripping and pressure-recovering system of the present invention;
图 3为本发明的一級射流泵的结构示意图;  Figure 3 is a schematic structural view of a primary jet pump of the present invention;
图 4为本发明的二級射流泵的结构示意图;  Figure 4 is a schematic structural view of a secondary jet pump of the present invention;
图 5为本发明的另一种二級射流泵的结构示意图。  Figure 5 is a schematic view showing the structure of another secondary jet pump of the present invention.
具体实施方式 detailed description
为了更清楚的解释本发明, 以便更好的理解本发明, 接下来结合附图通过具 体实施方式对本发明作进一步的描述。  The present invention will be further described in detail with reference to the accompanying drawings.
参见图 2、 图 3、 图 4和图 5 , 本发明提供了一种汽轮机真空汽提温提压回用 系统, 包括凝汽器 2和除氧器 16 , 所述凝汽器设有出水管 3和排汽管 4 , 所述汽 轮机真空汽提温提压回用系统还包括回收罐 1、 一級射流泵 5和二級射流泵 6 , 所 述二級射流泵优选为设有两级增压的立式的射流泵, 轴向垂直向下, 位于所述回 收罐的上方, 所述回收罐设有用于排水的回用水管道 7 和用于形成射流的射流管 道 8 ,所述射流管道和回用水管道通过同一个排水总管或者各自独立地连接所述回 收罐的出水区域, 所述排水总管或者所述独立连接所述回收罐的储水区域的射流 管道上设有高压排水泵 9和 9' , 所述独立连接所述回收罐的出水区域的回用水管 道上设有回用排水泵, 所述一級射流泵和二級射流泵的射流入口通过管道连接所 述凝汽器的出水管和 /或所述射流管道, 所述一級射流泵的抽吸入口连接所述凝汽 器的排汽管, 用于将所述凝汽器内的真空汽抽吸进所述一級射流泵, 所述二級射 流泵的抽吸入口连接所述一級射流泵的出口, 用于将一級射流泵中与射流介质混 合后真空汽抽吸进所述二級射流泵送入回收罐, 实现真空汽的热能的回收, 所述 二級射流泵的出口连接所述回收罐的入口, 所述回收罐的入口优选设置在所述回 收罐的顶部, 使得射流进入所述回收罐后从上向下流, 所述连接一級射流泵和二 級射流泵的管道或所述凝汽器的出水管上可以设有高压泵 10 , 用于增加管道内的 压力, 所述一級射流泵射流管道内的压力优选不小于 0. 5MPa , 以利于对真空汽的 抽吸及真空度的维持。 为了更好地实现本系统的运行, 可以在所述凝汽器的出水 管上设置截止阔, 以方便控制管道中介质的去向。 Referring to FIG. 2, FIG. 3, FIG. 4 and FIG. 5, the present invention provides a steam turbine vacuum stripping temperature lifting and reusing system, comprising a condenser 2 and a deaerator 16, wherein the condenser is provided with an outlet pipe. 3 and the exhaust pipe 4, the steam vacuum stripping and pressure recovery system of the steam turbine further comprises a recovery tank 1, a first-stage jet pump 5 and a secondary jet pump 6, wherein the secondary jet pump is preferably provided with two-stage supercharging a vertical jet pump, axially vertically downward, above the recovery tank, the recovery tank being provided with a return water conduit 7 for draining and a jet conduit 8 for forming a jet, the jet conduit and back The water pipe is connected to the water outlet area of the recovery tank by the same drainage main pipe or the water discharge pipe of the recovery tank, and the water discharge pipe of the water storage area independently connected to the recovery tank is provided with high-pressure drain pumps 9 and 9' The return water pipe independently connected to the water discharge area of the recovery tank is provided with a reuse drain pump, and the jet inlets of the primary jet pump and the secondary jet pump are connected to the outlet pipe of the condenser through a pipeline and/or Or the jet conduit, the first-stage jet a suction inlet of the pump is connected to the exhaust pipe of the condenser for drawing vacuum steam in the condenser into the primary jet pump, and a suction inlet of the secondary jet pump is connected to the The outlet of the first-stage jet pump is used for mixing the first-stage jet pump with the jet medium, and the vacuum steam is sucked into the secondary jet pump to be sent to the recovery tank to realize the recovery of the thermal energy of the vacuum steam, and the outlet of the secondary jet pump Connecting the inlet of the recovery tank, the inlet of the recovery tank is preferably disposed in the back a top of the tank, such that the jet flows from the top to the bottom after entering the recovery tank, and the high-pressure pump 10 may be disposed on the outlet pipe connecting the primary jet pump and the secondary jet pump or the outlet pipe of the condenser. The pressure in the first-stage jet pump is preferably not less than 0.5 MPa to facilitate the suction of vacuum steam and the maintenance of vacuum. In order to better realize the operation of the system, a cut-off width may be set on the outlet pipe of the condenser to facilitate control of the direction of the medium in the pipeline.
所述回用水管道上设有排水控制或切断阔 1 3 , 并连接所述除氧器的进水口, 所述回收罐设有用于釆集其水位信号的传感装置 14 , 所述传感装置的信号输出端 连接一个控制装置 15 , 所述控制装置根据预设的程序或控制参数工作, 其控制信 号输出端连接所述排水控制或切断阔的控制线路, 以便依据所述回收罐内的水位 对排水进行控制, 使所述回收罐内的水位维持在一定的范围内。  The water return pipe is provided with a drainage control or cut-off width 1 3 and is connected to the water inlet of the deaerator, and the recovery tank is provided with a sensing device 14 for collecting the water level signal thereof, the sensing device The signal output end is connected to a control device 15, the control device operates according to a preset program or control parameter, and the control signal output end is connected to the drain control or cuts off the wide control line, so as to be based on the water level in the recovery tank The drainage is controlled so that the water level in the recovery tank is maintained within a certain range.
为了提高系统的整体运行效率, 所述二級射流泵优选多级多管射流泵, 以形 成足够的压力保证将乏汽 (汽液混合物)送入回收罐并在回收罐内形成足够的压 力。  In order to increase the overall operating efficiency of the system, the secondary jet pump is preferably a multi-stage multi-tube jet pump to create sufficient pressure to ensure that the spent steam (steam-liquid mixture) is fed to the recovery tank and sufficient pressure is created in the recovery tank.
所述二級射流泵通常釆用两级增压, 设有一級射流管和二級射流管, 所述一 級射流管和二級射流管的进口均构成所述二級射流泵的入口, 其中一級射流管的 射流用于进口被抽吸介质流的增压输送, 二級射流管的射流用于一級射流管增压 输出的介质流的增压输送。  The secondary jet pump generally adopts two stages of pressurization, and is provided with a first-stage jet tube and a second-stage jet tube, and the inlets of the first-stage jet tube and the second-stage jet tube constitute an inlet of the second-stage jet pump, wherein one stage The jet of the jet tube is used for the pressurized delivery of the inlet pumped medium stream, and the jet of the secondary jet tube is used for the pressurized transport of the medium stream of the first stage jet tube boost output.
优选地, 所述一級射流管的数量为多个, 由此将进口被抽吸介质流分为多路, 以减小每个一級射流管的抽吸流量, 为在大流量下有效地增加射流泵的压头提供 了可能。  Preferably, the number of the first-stage jet tubes is plural, thereby dividing the inlet by the pumping medium flow into multiple paths, so as to reduce the suction flow rate of each of the first-stage jet tubes, so as to effectively increase the jet flow at a large flow rate. The pump head provides the possibility.
优选地, 所述二級射流管的数量为多个, 其出口均衡地分布在二級射流泵的 一个截面上, 以克服单一射流管能够抽吸的流量较小的缺陷, 保证在大流量场合 下的有效使用。  Preferably, the number of the two-stage jet tubes is plural, and the outlets thereof are evenly distributed on one section of the secondary jet pump to overcome the defect that the single jet tube can absorb less flow, ensuring a large flow occasion. Effective use under.
图 4提供了一种二級射流泵的实施例, 该二級射流泵的泵体呈立式的管状, 设有多个抽吸管 61 , 所述各抽吸管旋转对称分布, 各抽吸管的入口构成所述二级 射流泵的抽吸入口, 各抽吸管的入口可以连接所述一級射流泵的出口或者可以连 接一根主抽吸管, 所述主抽吸管连接所述一級射流泵的出口, 所述抽吸管穿过泵 体的侧壁延伸到泵体内, 其位于泵体内的部分呈折弯向下延伸, 出口段 62为沿泵 体轴线方向的直管, 所述抽吸管的数量通常为多个, 并在同一高度上沿圆周均匀 分布, 在抽吸流量较小的情况下也可以是一个。 该二級射流泵设有一級射流管 63 和二級射流管 64 , 所述二級射流管穿过泵体后端面延伸到所述泵体内, 其出口位 于所述抽吸管的出口的上方, 所述一級射流管在泵体外穿入所述抽吸管并沿所述 抽吸管轴线方向一直延伸至所述抽吸管的出口段, 其出口位于所述抽吸管的出口 端之内。 来自一级射流泵的被抽吸介质流首先进入该二级射流泵的所述抽吸管, 所述一級射流管在抽吸管内射出一級射流, 在抽吸管内形成负压, 使被抽吸介质 在该负压的作用下向前流动, 与一級射流管射出的射流混合, 所述二級射流管在 泵体内形成负压(相对而言), 带动抽取被一級射流管射出的射流抽吸, 形成混合 介质流, 而二級射流管在泵体内形成负压区, 带动抽吸管内的混合介质流流动。 Figure 4 provides an embodiment of a secondary jet pump having a pump body in a vertical tubular shape with a plurality of suction tubes 61, said suction tubes being rotationally symmetrically distributed, each suction The inlet of the tube constitutes a suction inlet of the secondary jet pump, the inlet of each suction tube may be connected to the outlet of the primary jet pump or may be connected to a main suction tube, the primary suction tube being connected to the first stage An outlet of the jet pump, the suction pipe extends through the side wall of the pump body into the pump body, the portion of the pump body extending downwardly and downwardly, and the outlet section 62 is a straight pipe along the axial direction of the pump body, The number of suction pipes is usually plural and uniform along the circumference at the same height The distribution can also be one if the suction flow rate is small. The secondary jet pump is provided with a first-stage jet tube 63 and a secondary jet tube 64. The second-stage jet tube extends through the rear end surface of the pump body into the pump body, and an outlet thereof is located above the outlet of the suction tube. The primary jet tube penetrates the suction tube outside the pump and extends in the direction of the suction tube axis to the outlet section of the suction tube, the outlet of which is located within the outlet end of the suction tube. The pumped medium stream from the primary jet pump first enters the suction tube of the secondary jet pump, the primary jet tube ejects a primary jet within the suction tube, creating a negative pressure within the suction tube for suction The medium flows forward under the action of the negative pressure, and is mixed with the jet emitted from the first-stage jet tube, and the secondary jet tube forms a negative pressure (relatively) in the pump body, and drives the suction of the jet which is ejected by the first-stage jet tube. Forming a mixed medium flow, and the secondary jet tube forms a negative pressure zone in the pump body to drive the flow of the mixed medium in the suction pipe.
图 5 给出了二級射流泵的另一种实施例, 在该实施例中, 所述二級射流泵的 泵体的主体部分呈立式的管状, 后部呈弯头状 65 , 所述弯头的外端口构成所述二 級射流泵的抽吸入口, 由此既方便了二級射流泵同相关管道的连接, 也保证了二 級射流泵的抽吸入口通道恰好为所述一級射流管的出口后面的负压区域, 以提高 抽吸效果。 所述二級射流泵设有一級射流管 63和二級射流管 64 , 优选地, 所述一 級射流管沿所述二級射流泵的泵体的轴线从所述二級射流泵的后部穿入所述二级 射流泵的内腔, 设有位于所述二級射流泵的泵体内的延伸段, 所述一級射流管延 伸段呈直管状, 所述一級射流管延伸段优选沿所述二級射流泵的轴向方向延伸, 并在端部为其出口 (即一級射流介质出口), 一級射流介质从该出口向外喷射, 在 泵体的内腔中形成锥形的喷射区域。 优选地, 所述一級射流介质出口可以设置成 锥形口, 以优化射流, 所述一級射流介质出口方向应朝向所述二級射流泵的泵体 内的介质流向方向, 所述二級射流管可以设有延伸进所述二級射流泵的泵体内的 二級射流管延伸段, 所述二級射流管延伸段优选设有折弯, 折弯后呈与所述二级 射流泵的泵体的轴线方向相同的直管状, 并在端部设有二級射流介质出口, 所述 二級射流介质出口可以设置成锥形口, 以便更好地形成所需的射流, 所述二級射 流介质出口方向 (二級射流管的出口的开口方向)优选朝向所述二級射流泵的泵 体内的介质流向方向, 所述二級射流管的出口优选位于所述一級射流管的出口的 喷射区域内, 以提高二級射流的抽吸作用。  Figure 5 shows another embodiment of the secondary jet pump. In this embodiment, the main body portion of the pump body of the secondary jet pump has a vertical tubular shape, and the rear portion has a curved shape 65. The outer port of the elbow constitutes the suction inlet of the secondary jet pump, thereby facilitating the connection of the secondary jet pump to the relevant pipeline, and also ensuring that the suction inlet passage of the secondary jet pump is exactly the first-stage jet The negative pressure area behind the outlet of the tube to enhance the suction effect. The secondary jet pump is provided with a first-stage jet tube 63 and a second-stage jet tube 64. Preferably, the first-stage jet tube is worn from the rear of the secondary jet pump along the axis of the pump body of the secondary jet pump. The inner cavity of the secondary jet pump is provided with an extension in the pump body of the secondary jet pump, the first-stage jet tube extension is straight tubular, and the first-stage jet tube extension is preferably along the second The stage jet pump extends in the axial direction and at its end is its outlet (i.e., the primary jet medium outlet) from which the primary jet medium is ejected outwardly to form a tapered spray region in the interior of the pump body. Preferably, the first-stage jet medium outlet may be provided as a tapered port to optimize the jet flow direction, and the first-stage jet medium outlet direction should be directed toward the direction of the medium flow in the pump body of the secondary jet pump, and the secondary jet tube may be Providing a secondary jet tube extension extending into the pump body of the secondary jet pump, the secondary jet tube extension preferably being provided with a bend, and after bending, is provided with the pump body of the secondary jet pump a straight tubular shape having the same axial direction and a secondary jet medium outlet at the end, the secondary jet medium outlet being provided as a tapered opening for better formation of a desired jet, the secondary jet medium outlet The direction (the opening direction of the outlet of the secondary jet tube) is preferably directed toward the direction of the medium flow in the pump body of the secondary jet pump, the outlet of the secondary jet tube preferably being located in the injection region of the outlet of the primary jet tube, To increase the suction of the secondary jet.
所述二级射流泵优选为立式射流泵, 射流以及抽吸后的混合介质流从上向下, 以利用介质的位能获得更好的抽吸效果, 特别是对于工业应用中, 由于乏汽和混 合介质流量很大, 因此射流泵的高度往往有数米甚至更高, 由此可以明显地提高 射流泵的压头, 大幅度节省动力消耗。 The secondary jet pump is preferably a vertical jet pump, the jet and the mixed mixed medium flow from top to bottom, to obtain better suction effect by utilizing the potential energy of the medium, especially for industrial applications, due to lack of Steam and mixing The flow rate of the combined medium is large, so the height of the jet pump tends to be several meters or even higher, thereby significantly increasing the pressure head of the jet pump and greatly reducing power consumption.
所述二級射流泵的二級射流管的数量可以为一个或若干个, 当所述二級射流 管的数量为若干个时, 所述若干个二級射流管可以均匀连接在所述二級射流泵的 径向方向的同一圆周上, 或者所述二級射流管设有若干个二級射流管支管, 所述 若干个所述二級射流管支管的一端连接所述二級射流管, 另一端均匀连接在所述 二級射流泵的径向方向的同一圆周上, 所述二級射流管的出口均衡地分布在所述 二級射流泵的泵体内的介质通道的一个截面上, 所述二級射流泵的若干个二級射 流管或二級射流管支管的设置, 可以更加有效地对来自所述一級射流泵的被抽吸 介质进行增压, 使被抽吸介质可以更顺利地进入回收罐。  The number of the secondary jet tubes of the secondary jet pump may be one or several. When the number of the secondary jet tubes is several, the plurality of secondary jet tubes may be uniformly connected to the secondary On the same circumference of the radial direction of the jet pump, or the secondary jet tube is provided with a plurality of secondary jet tube branches, one end of the plurality of the second-stage jet tube branches is connected to the second-stage jet tube, and One end is evenly connected to the same circumference in the radial direction of the secondary jet pump, and the outlet of the secondary jet tube is evenly distributed on a section of the medium passage in the pump body of the secondary jet pump, The arrangement of several secondary jet tubes or secondary jet tube branches of the secondary jet pump can more effectively pressurize the pumped medium from the primary jet pump, so that the pumped medium can enter more smoothly. Recycling tanks.
所述二級射流泵的抽吸管设置成均匀分布的多个管道, 可以将大流量的介质 流分解为多个相对小流量的介质流, 分别在各抽吸管内进行一級射流管的抽吸增 压, 由此解决了普通射流泵的抽吸流量小、 无法为大流量介质增压的缺陷, 有效 地实现了大流量介质流的增压, 同时在泵体内通过二級射流管的增压作用, 形成 了稳定并且可靠的增压介质流, 有利于改善二級射流泵的泵体和回收罐内的介质 流状态, 保证介质流顺利地进入所述回收罐内。  The suction pipe of the secondary jet pump is arranged as a plurality of uniformly distributed pipes, and the large flow medium flow can be decomposed into a plurality of relatively small flow medium flows, and the first-stage jet pipe is respectively sucked in each suction pipe. The supercharging method solves the defect that the ordinary jet pump has a small suction flow rate and cannot pressurize the large flow medium, effectively realizes the supercharging of the large flow medium flow, and simultaneously pressurizes the secondary flow tube in the pump body. The function of forming a stable and reliable pressurized medium flow is beneficial to improving the state of the medium flow in the pump body and the recovery tank of the secondary jet pump, and ensuring that the medium flow smoothly enters the recovery tank.
参见图 3 , 为了改善整体系统的介质流状态和两級射流泵组合的总体输送能 力, 所述一級射流泵优选管道式射流泵, 其泵体的主体部分呈管状, 所述管状泵 体的进口构成一級射流泵的抽吸进口 51 , 出口构成一級射流泵的出口 52 , 所述一 級射流泵射流管道穿过所述泵体的侧壁, 延伸至泵体内, 与位于所述泵体内的射 流分布管连接,所述射流分布管包括与所述一級射流泵射流管道同轴的延伸段 53 , 所述延伸段位于所述泵体的一个横截面上, 沿泵体的径向方向延伸, 端部封闭或 密封连接在所述泵体的内壁上, 所述延伸段上设有多个射流口或射流管 54 , 所述 延伸段上可以设有一个或多个与其连通的交叉管 55 , 所述交叉管也均勾设置有若 干个射流口或射流管, 所述交叉管构成所述射流分布管的一部分。 所述各射流口 和射流管通常应朝向所述泵体的轴线延伸方向, 以利于减小阻力, 提高抽吸效果, 优选所述各射流口或射流管均衡分布。  Referring to FIG. 3, in order to improve the medium flow state of the overall system and the overall conveying capacity of the two-stage jet pump combination, the primary jet pump is preferably a tubular jet pump, the main body portion of which is tubular, and the inlet of the tubular pump body Forming a suction inlet 51 of the primary jet pump, the outlet forming an outlet 52 of the primary jet pump, the primary jet pump jet conduit extending through the side wall of the pump body, extending into the pump body, and the jet distribution in the pump body a tube connection, the jet distribution tube comprising an extension 53 coaxial with the first-stage jet pump jet conduit, the extension being located on a cross section of the pump body, extending in a radial direction of the pump body, the end portion Closed or sealedly connected to the inner wall of the pump body, the extension section is provided with a plurality of jet ports or jet tubes 54, and the extension section may be provided with one or more cross tubes 55 communicating with the The cross tube is also provided with a plurality of jet ports or jet tubes, which form part of the jet distribution tube. The jet ports and the jet tubes should generally extend toward the axis of the pump body to reduce the resistance and improve the suction effect. Preferably, the jet ports or the jet tubes are evenly distributed.
所述射流管同所述延伸段或交叉管的内径比通常可以不大于 1 : 5,优选不大于 1: 10 , 如 1: 10、 1: 12、 1: 15、 1: 18、 1: 20或 1 : 30 , 以在所述延伸段和交叉 管内进行匀压, 使各射流管的压力和出口流速基本上保持均衡, 并保证射流具有 足够高的流速, 从而提高抽吸力和对被抽吸介质的抽吸效果, 改善所述凝汽器的 排汽管内的介质流动状态, 减小湍流和动力消耗。 所述射流介质出口可以设置成 锥形出口, 以便更好地形成射流。 The inner diameter ratio of the jet tube to the extension or cross tube may generally be no more than 1:5, preferably no more than 1:10, such as 1:10, 1:12, 1:15, 1:18, 1:20 Or 1:30 to the extension and cross The pressure is uniformly equalized in the tube to ensure that the pressure of each jet tube and the outlet flow rate are substantially balanced, and that the jet has a sufficiently high flow rate, thereby improving the suction force and the suction effect on the suctioned medium, and improving the condenser The flow state of the medium in the exhaust pipe reduces turbulence and power consumption. The jet medium outlet may be provided as a tapered outlet for better jet formation.
所述射流分布管的直径优选大于喷射口 (所述射流介质出口或所述喷射管上 的喷射出口) 的直径的 1 倍或以上, 由此可以有效地降低所述射流分布管中的介 质流速, 保持或回复介质的静压, 这样即有利于保持各喷射口的压力、 流速和流 量均衡, 又有利于所述射流分布管内部的介质流稳定, 减少湍流和阻力, 并有利 于减少气蚀, 延长射流分布管的使用寿命。  The diameter of the jet distribution tube is preferably greater than 1 or more times the diameter of the injection port (the jet medium outlet or the injection port on the injection tube), whereby the medium flow rate in the jet distribution tube can be effectively reduced Maintaining or restoring the static pressure of the medium, which is beneficial to maintain the pressure, flow rate and flow balance of each injection port, and is beneficial to the stability of the medium flow inside the jet distribution tube, reducing turbulence and resistance, and helping to reduce cavitation. , prolong the service life of the jet distribution tube.
通过这种多个射流口的设置, 在一級射流泵的泵体内形成了均衡分布的多股 射流, 在整个介质通道上形成负压区域, 带动来自泵体进口端的乏汽向前流动。 这种管道式射流泵特别是适应于在大管径管道内驱动大流量的介质流动, 克服了 现有普通射流泵因抽吸的介质流量小、 动力消耗大而在大管径管道下难以解决介 质流动性的缺陷。  Through the arrangement of the plurality of jet ports, a plurality of evenly distributed jets are formed in the pump body of the primary jet pump, and a negative pressure region is formed on the entire medium passage to drive the forward steam from the inlet end of the pump body to flow forward. The pipeline type jet pump is especially suitable for driving a large flow medium flow in a large diameter pipe, and overcomes the problem that the conventional common jet pump is difficult to solve under large diameter pipe due to small medium flow rate and power consumption. Defects in media fluidity.
一般来说, 真空汽的加压困难, 并且在汽轮机系统中, 真空汽的排汽管的管 径均在 lm ~ 2m左右, 由于其所传输的真空汽压力过小传输较为困难, 一級射流泵 的设置, 有效地提高了真空汽在排气管中流动速度, 解决了真空汽在运送管道中 由于管径较大且真空汽压力低造成的难于回收的技术问题, 同时还可为二級射流 泵提供压力相对较高的被抽吸介质, 有助于提高二級射流泵的抽吸效果。 一般来 说, 所述凝汽器的排汽管内的真空汽温度在 30 °C ~ 50 °C左右, 经过一級射流泵的 抽吸后, 所述抽吸管道内的混合介质温度通常可升高为 40 °C ~ 70 °C左右, 真空汽 的温度及压力均有所提高。  In general, the vacuum steam is difficult to press, and in the steam turbine system, the diameter of the vacuum steam exhaust pipe is about lm ~ 2m, because the vacuum steam pressure transmitted by it is too small to transmit, the first-stage jet pump The setting effectively improves the flow speed of the vacuum steam in the exhaust pipe, and solves the technical problem that the vacuum steam is difficult to recover due to the large diameter of the pipe and the low vacuum pressure in the conveying pipe, and can also be the secondary jet. The pump provides a relatively high pressure pumped medium that helps to increase the suction of the secondary jet pump. Generally, the vacuum steam temperature in the exhaust pipe of the condenser is about 30 ° C ~ 50 ° C, and the temperature of the mixed medium in the suction pipe can generally rise after being sucked by the first-stage jet pump. The temperature and pressure of the vacuum steam are increased from 40 °C to 70 °C.
所述回收罐优选为立式回收罐, 其竖向尺寸大于其横向尺寸。 通常立式回收 罐的横截面为圆形, 其高度优选大于截面直径的 1 倍或以上。 所述回收罐为密闭 状态, 其内部的气相压力通常可以为一个标准大气压左右, 以利于二級射流泵向 回收罐内的介质输送及回收罐内真空汽的凝结, 其内部的凝结水温度 100 °C左右, 由此在避免过多动力消耗的情况下, 形成适应于锅炉除氧器的高温凝结水, 直接 回用于汽轮机发电系统的除氧器中。 由于这些凝结水来自锅炉输出的蒸汽, 并且 回收过程完全是封闭的, 可以避免外部空气中氧和酸性气体的溶入, 适应于除氧 器的用水要求, 有利于减少除氧成本。 而立式回收罐的选用, 则可以通过其罐体 自身的高度或罐体内凝结水水面的高度形成的压力, 提高排水的压力, 以减小排 水的动力消耗, 这种作用在汽轮机乏汽回收的规模下, 显得特别明显。 The recovery tank is preferably a vertical recovery tank having a vertical dimension greater than its lateral dimension. Usually, the vertical recovery tank has a circular cross section and its height is preferably greater than one or more times the diameter of the cross section. The recovery tank is in a closed state, and the internal gas phase pressure can be generally about one standard atmospheric pressure, so as to facilitate the transportation of the secondary jet pump to the medium in the recovery tank and the condensation of the vacuum vapor in the recovery tank, and the internal condensed water temperature is 100. Around °C, thereby avoiding excessive power consumption, forming high-temperature condensate suitable for the boiler deaerator, and directly returning to the deaerator of the steam turbine power generation system. Since these condensed water comes from the steam output from the boiler, and the recovery process is completely closed, it can avoid the infiltration of oxygen and acid gases in the outside air, and is suitable for oxygen removal. The water requirements of the device help to reduce the cost of oxygen removal. The selection of the vertical recovery tank can increase the pressure of the drainage by the height of the tank itself or the height of the condensed water surface of the tank body, so as to reduce the power consumption of the drainage. The scale is particularly obvious.
根据不同的实际工作情况, 如真空汽设备的真空汽排量, 所述回收罐的数量 可以设置成若干个, 所述一級射流泵和二級射流泵的数量与所述回收罐的数量相 同, 并——对应设置, 釆用并联的方式共同对真空汽的水资源和热能进行回收再 利用。 若干所述回收罐的回用水管道可以分别连接所述凝结水回收源, 也可以连 接同一根主回用水管道, 所述主排水管道连接所述凝结水回收源, 釆用此种设置 时, 与所述一级射流泵和 /或二级射流泵连接的各管道均可以设有与所述回收罐的 数量相同的支管, 并与对应的射流泵连接。  According to different actual working conditions, such as the vacuum steam discharge amount of the vacuum steam device, the number of the recovery tanks may be set to several, and the number of the first-stage jet pump and the secondary jet pump is the same as the number of the recovery tanks. And - corresponding to the setting, 并联 use the parallel way to jointly recycle and reuse the water and heat energy of the vacuum steam. The return water pipes of the plurality of recovery tanks may be respectively connected to the condensed water recovery source, or may be connected to the same main return water pipeline, and the main drainage pipeline is connected to the condensed water recovery source, and when the setting is used, Each of the pipes connected to the primary jet pump and/or the secondary jet pump may be provided with the same number of branch pipes as the recovery canister and connected to a corresponding jet pump.
为了实现系统的自动、 安全、 高效、 连续的运行, 所述回收罐可以设有安全 阔 11和排气阀 12 , 所述安全阀和排气阀可以分别安装在所述回收罐的顶部, 通过 所述排气阀可以将不能形成凝结水的不凝气体定期排出, 以免过多地占用所述回 收罐的空间, 所述安全阔可以在所述回收罐内压力超过一定限度后自动泄压, 以 保证回收罐内的压力稳定及系统的安全运行。 所述回收罐的出口优选设置在所述 回收罐的底部, 由此保证从所述回收罐的出口出来的都是凝结水, 经回用水管道 加压输出的凝结水温度可达 80 °C ~ 120 °C , 更有利于二次利用, 所述高压排水泵的 数量可以为一用一备的两个, 也可以为多用一备的大于 2个的数量。  In order to achieve automatic, safe, efficient and continuous operation of the system, the recovery tank may be provided with a safety fence 11 and an exhaust valve 12, which may be respectively installed on the top of the recovery tank, The exhaust valve can periodically discharge non-condensable gas that cannot form condensed water, so as to avoid occupying excessive space of the recovery tank, and the safety can be automatically relieved after the pressure in the recovery tank exceeds a certain limit. To ensure the stability of the pressure in the recovery tank and the safe operation of the system. The outlet of the recovery tank is preferably disposed at the bottom of the recovery tank, thereby ensuring that condensed water is discharged from the outlet of the recovery tank, and the temperature of the condensed water pressurized by the return water pipeline can reach 80 ° C ~ 120 ° C, more favorable for secondary use, the number of high-pressure drainage pumps can be two for one or two, or more than two for a multi-purpose.
本发明所涉及的各管道上均可以设有适宜的阔门, 以方便实现控制, 还可以 依据需要设置压力表, 以根据其显示的压力进行调节。  Each of the pipes involved in the present invention may be provided with a suitable wide door for convenient control, and a pressure gauge may be provided as needed to adjust according to the displayed pressure.
本发明所涉及的各管道的直径大小可以根据射流泵和回收罐的大小及工程需 要适宜选择, 所述各管道可以釆用等径管, 以方便加工, 也可以至少一个是不等 径管, 以适应不同位置的流速和阻力要求。 所述各管道之间以及各管道与射流泵 之间可以釆用焊接、 依次注塑成型或其它适宜的方式连接, 任一管体穿过另一管 体或射流泵的泵体的相互连接均为密封连接。  The diameter of each pipe involved in the present invention can be appropriately selected according to the size of the jet pump and the recovery tank and the engineering needs, and the pipes can be used with equal diameter pipes to facilitate the processing, or at least one of the unequal diameter pipes. To adapt to the flow rate and resistance requirements of different locations. The pipes and the pipes and the jet pump may be connected by welding, sequentially injection molding or other suitable manner, and the connection of any pipe body through the other pipe body or the pump body of the jet pump is Sealed connection.
本说明书的负压均相对于该负压所涉及的被抽吸介质的原有压力而言, 其绝 对值可以小于大气压, 也可以大于大气压。  The negative pressure of the present specification may be less than atmospheric pressure or greater than atmospheric pressure with respect to the original pressure of the pumped medium involved in the negative pressure.

Claims

权 利 要 求 书 Claim
1、 一种汽轮机真空汽提温提压回用系统, 包括凝汽器, 其特征在于还包 括回收罐、 一級射流泵和二級射流泵, 所述回收罐设有射流管道和回用水管道, 所述射流管道和回用水管道通过同一个排水总管或者各自独立地连接所述回收罐 的储水区域, 所述排水总管或者所述独立连接所述回收罐的储水区域的射流管道 上设有高压排水泵, 所述独立连接所述回收罐的储水区域的回用水管道上设有回 用排水泵, 所述一級射流泵和二級射流泵的射流入口通过管道连接所述凝汽器的 出水管和 /或所述射流管道, 所述一級射流泵的抽吸入口连接所述凝汽器的排汽 管, 所述二級射流泵的抽吸入口连接所述一級射流泵的出口, 所述二級射流泵的 出口连接所述回收罐的入口。  1. A steam turbine vacuum stripping temperature lifting and recycling system, comprising a condenser, characterized in that it further comprises a recovery tank, a first-stage jet pump and a secondary jet pump, wherein the recovery tank is provided with a jet pipeline and a return water pipeline. The jet pipe and the return water pipe are respectively connected to the water storage area of the recovery tank through the same drainage main pipe or the water storage area of the water storage area independently connected to the recovery tank. a high-pressure drain pump, wherein the return water pipe of the water storage area independently connected to the recovery tank is provided with a reuse drain pump, and the jet inlets of the first-stage jet pump and the secondary jet pump are connected to the condenser through a pipeline An outlet pipe and/or the jet pipe, a suction inlet of the primary jet pump is connected to an exhaust pipe of the condenser, and a suction inlet of the secondary jet pump is connected to an outlet of the primary jet pump The outlet of the secondary jet pump is connected to the inlet of the recovery tank.
2、 如权利要求 1所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述一級射流泵为管道式射流泵, 所述二級射流泵为多級射流泵, 所述回收罐为立 式回收罐。 2. The steam turbine vacuum stripping temperature recovery system according to claim 1, wherein said first-stage jet pump is a duct-type jet pump, and said second-stage jet pump is a multi-stage jet pump, said recovery tank For vertical recycling tanks.
3、 如权利要求 2所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述二级射流泵为设有两级增压的立式的射流泵, 设有一级射流管和二级射流管, 所述一級射流管和二級射流管的进口均构成所述二級射流泵的射流入口, 所述一 級射流管的射流用于为从所述二級射流泵的抽吸入口进入的介质流增压, 所述二 級射流管的射流用于为经所述一級射流管增压后的介质流的增压。 3. The steam turbine vacuum stripping pressure recovery system according to claim 2, wherein the secondary jet pump is a vertical jet pump provided with two stages of supercharging, and is provided with a first-stage jet tube and two. a jet tube, the inlets of the primary and secondary jets each forming a jet inlet of the secondary jet pump, the jet of the primary jet being used to enter from a suction inlet of the secondary jet pump The medium flow is pressurized, and the jet of the secondary jet is used to pressurize the medium flow after being pressurized by the primary jet.
4、 如权利要求 3所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述一級射流管的数量和 /或所述二級射流管的数量为一个或多个,所述一級射流管 的数量为多个时, 所述二級射流泵的抽吸入口分为多路, 每一个所述的一級射流 管为从与其对应的一路所述二級射流泵的抽吸入口进入的介质流增压, 所述二级 射流管的数量为多个时, 所述多个二級射流管的出口均衡地分布在所述二級射流 泵的泵体内的介质通道的一个截面上。 4. The steam turbine vacuum stripping pressure recovery system according to claim 3, wherein the number of the primary jet tubes and/or the number of the secondary jet tubes is one or more, the first stage. When the number of the jet tubes is plural, the suction inlets of the secondary jet pumps are divided into multiple paths, and each of the first-stage jet tubes is entered from a suction inlet of the corresponding two-stage jet pump corresponding thereto. When the number of the secondary jet tubes is plural, the outlets of the plurality of secondary jet tubes are evenly distributed on a section of the medium passage in the pump body of the secondary jet pump.
5、 如权利要求 3所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述二級射流泵的泵体呈立式的管状, 设有多个抽吸管, 所述各抽吸管旋转对称分 布, 各抽吸管的入口构成所述二級射流泵的抽吸入口, 所述抽吸管穿过泵体的侧 壁延伸到泵体内, 其位于泵体内的部分设有向下的折弯, 位于所述折弯下方的抽 吸管呈与所述二級射流泵的泵体的轴线方向相同的直管状, 所述二級射流管穿过 所述二級射流泵的泵体的后端面延伸到所述泵体内, 其出口位于所述各抽吸管的 出口的上方并使所述各抽吸管的出口位于其射流的喷射区域内, 所述一級射流管 在泵体外穿入所述抽吸管并沿所述抽吸管的延伸方向一直延伸至所述抽吸管的出 口段, 其出口位于所述抽吸管的出口的里侧, 其射流喷射区域沿抽吸管的轴向逐 渐扩张至所述抽吸管内的整个截面。 5. The steam turbine vacuum stripping and pressure-recovering system of claim 3, wherein the pump body of the secondary jet pump is in a vertical tubular shape, and a plurality of suction pipes are provided. The suction pipe is rotationally symmetrically distributed, the inlet of each suction pipe constitutes a suction inlet of the secondary jet pump, and the suction pipe passes through the side of the pump body The wall extends into the pump body, the portion of the pump body is provided with a downward bend, and the suction pipe located below the bend is in the same straight tubular direction as the axial direction of the pump body of the secondary jet pump. The secondary jet tube extends through the rear end surface of the pump body of the secondary jet pump into the pump body, the outlet of which is located above the outlet of each suction tube and the outlet of each suction tube is located In the injection region of the jet, the first-stage jet tube penetrates the suction tube outside the pump body and extends along the extending direction of the suction tube to the outlet section of the suction tube, the outlet of which is located in the pumping section On the inner side of the outlet of the straw, its jet ejection region is gradually expanded in the axial direction of the suction tube to the entire cross section in the suction tube.
6、 如权利要求 3所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述二級射流泵的泵体的主体部分呈立式的管状, 后部呈弯头状, 所述弯头的外端 口构成所述二級射流泵的抽吸入口, 所述一級射流管沿所述二級射流泵的泵体的 轴线从所述二級射流泵的后部穿入所述二級射流泵的内腔, 设有位于所述二級射 流泵的泵体的一級射流管延伸段, 所述一級射流管延伸段呈直管状, 所述二級射 流管从所述二級射流泵的泵体的侧壁穿入所述二級射流泵的泵体内, 其位于所述 二級射流泵的泵体内的部分设有折弯, 折弯后呈与所述二級射流泵的泵体的轴线 方向相同的直管状, 所述二級射流管的出口位于所述一級射流管的出口的喷射区 域内。 6. The steam turbine vacuum stripping pressure recovery system according to claim 3, wherein the main body portion of the pump body of the secondary jet pump has a vertical tubular shape and a rear portion having an elbow shape. An outer port of the elbow constitutes a suction inlet of the secondary jet pump, the primary jet pipe penetrating from the rear of the secondary jet pump to the second stage along an axis of the pump body of the secondary jet pump The inner cavity of the jet pump is provided with a first-stage jet tube extension section of the pump body of the secondary jet pump, the first-stage jet tube extending section is straight tubular, and the secondary jet tube is from the secondary jet pump a side wall of the pump body penetrates into the pump body of the secondary jet pump, and a portion thereof located in the pump body of the secondary jet pump is provided with a bend, and is bent to be a pump body of the secondary jet pump A straight tubular shape having the same axial direction, the outlet of the secondary jet tube being located in the injection region of the outlet of the primary jet tube.
7、 如权利要求 1、 1、 3、 4、 5或 6所述的汽轮机真空汽提温提压回用系 统, 其特征在于所述一級射流泵的泵体的主体部分呈管状, 所述管状泵体的进口 构成所述一級射流泵的抽吸入口, 出口构成所述一級射流泵的出口, 所述一級射 流泵的射流管设有位于所述泵体内的射流口或射流管, 所述射流口或射流管的数 量为多个, 分布在所述管状泵体的同一个横截面上或者多个不同的横截面上, 并 朝向所述泵体的轴线延伸方向。  7. The steam turbine vacuum stripping temperature recovery system according to claim 1, 1, 3, 4, 5 or 6, wherein the main body portion of the pump body of the primary jet pump is tubular, the tubular An inlet of the pump body constitutes a suction inlet of the primary jet pump, and an outlet constitutes an outlet of the primary jet pump, and a jet tube of the primary jet pump is provided with a jet port or a jet tube located in the pump body, the jet The number of ports or jet tubes is plural, distributed in the same cross section of the tubular pump body or in a plurality of different cross sections, and extends in the direction of the axis of the pump body.
8、 如权利要求 7所述的汽轮机真空汽提温提压回用系统, 所述一級射流 泵的射流管道穿过所述泵体的侧壁, 与位于所述泵体内的射流分布管连接, 所述 射流分布管包括与所述一級射流泵射流管道同轴的延伸段, 所述延伸段设有或者 不设与其连通的交叉管, 所述延伸段和交叉管的端口封闭, 所述延伸段和交叉管 上设有所述的多个射流口或者射流管, 所述各射流口或射流管在所述延伸段和交 叉管上均衡分布。 8. The steam turbine vacuum stripping and pressure-recovering system of claim 7, wherein the jet stream of the first-stage jet pump passes through a side wall of the pump body and is connected to a jet distribution tube located in the pump body. The jet distribution tube includes an extension coaxial with the first-stage jet pump jet conduit, the extension section is provided with or without an intersecting tube communicating therewith, the extension section and the port of the cross-tube are closed, the extension section And the plurality of jet ports or jet tubes are disposed on the intersecting tube, and the jet ports or the jet tubes are evenly distributed on the extending portion and the intersecting tube.
9、 如权利要求 8所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述回收罐还设有安全阔和排气阔, 所述安全阔和排气阔分别安装在所述回收罐的 顶部, 所述回收罐上用于连接所述排水总或所述各自独立地连接所述回收罐的储 水区域的射流管道和回用水管道的凝结水出口设置在所述回收罐的底部, 所述高 压排水泵的数量是一用一备的两个或多用一备的多于 2个。 9. The steam turbine vacuum stripping and pressure-recovering system of claim 8, wherein the recovery tank is further provided with a safety width and a venting width, and the safety width and the exhaust width are respectively installed in the a top portion of the recovery tank, the condensate outlet on the recovery tank for connecting the drain or the condensate outlet of the water returning region of the return tank, which is independently connected to the recovery tank, is disposed in the recovery tank At the bottom, the number of the high-pressure drain pumps is more than two for one or more spares.
10、 如权利要求 9所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述回用水管道上设有排水控制或切断阔, 并连接锅炉系统的除氧器的进水口。 10. The steam turbine vacuum stripping pressure recovery system according to claim 9, wherein the return water pipe is provided with a drainage control or a cut-off width, and is connected to a water inlet of the deaerator of the boiler system.
11、 如权利要求 10所述的汽轮机真空汽提温提压回用系统,其特征在于所 述回收罐设有用于釆集其水位信号的传感装置, 所述传感装置的信号输出端连接 一个控制装置, 所述控制装置的控制信号输出端连接所述排水控制或切断阔的控 制线路。  11. The steam turbine vacuum stripping temperature recovery system according to claim 10, wherein the recovery tank is provided with sensing means for collecting the water level signal, and the signal output end of the sensing device is connected. A control device, the control signal output of the control device is connected to the drain control or cuts off the wide control line.
12、 如权利要求 9所述的汽轮机真空汽提温提压回用系统, 其特征在于所 述回收罐的数量为若干个, 所述一級射流泵和二級射流泵的数量与所述回收罐的 数量相同, 并与其——对应设置。  12. The steam turbine vacuum stripping pressure recovery system according to claim 9, wherein the number of the recovery tanks is several, and the number of the primary jet pump and the secondary jet pump is the same as the recovery tank. The number is the same and corresponds to the setting.
PCT/CN2011/076836 2011-03-16 2011-07-04 Turbine vacuum steam heating and pressurizing reuse system WO2012122762A1 (en)

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CN102162377B (en) * 2011-03-16 2013-11-06 李树生 System for reclaiming vacuum steam after temperature rise and pressure rise of steam turbine

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CN1959069A (en) * 2006-08-23 2007-05-09 李树生 System of reclaiming exhaust steam in steam turbine
CN101644280A (en) * 2009-05-31 2010-02-10 北京凝汽动力技术有限公司 Multistage suction-ejection pump
CN102162377A (en) * 2011-03-16 2011-08-24 李树生 System for reclaiming vacuum steam after temperature rise and pressure rise of steam turbine

Patent Citations (6)

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US3686867A (en) * 1971-03-08 1972-08-29 Francis R Hull Regenerative ranking cycle power plant
DE2741514A1 (en) * 1977-09-15 1979-03-22 Wenzel Geb Dolmanns Yvonne Energy utilising station powered by natural gas - has two injection pumps compressing gas for recycling between output and heat exchanger
CN1045846A (en) * 1989-03-20 1990-10-03 邬建平 Cavity-tongue type jet injector with high efficiency
CN1959069A (en) * 2006-08-23 2007-05-09 李树生 System of reclaiming exhaust steam in steam turbine
CN101644280A (en) * 2009-05-31 2010-02-10 北京凝汽动力技术有限公司 Multistage suction-ejection pump
CN102162377A (en) * 2011-03-16 2011-08-24 李树生 System for reclaiming vacuum steam after temperature rise and pressure rise of steam turbine

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