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CN108716862B - Pressure-variable steam thermodynamic cycle system - Google Patents

Pressure-variable steam thermodynamic cycle system Download PDF

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Publication number
CN108716862B
CN108716862B CN201810750578.7A CN201810750578A CN108716862B CN 108716862 B CN108716862 B CN 108716862B CN 201810750578 A CN201810750578 A CN 201810750578A CN 108716862 B CN108716862 B CN 108716862B
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steam
condensate
pressure
tank body
pressure limiting
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CN108716862A (en
Inventor
吴江
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Guangzhou Yuanyin Environmental Technology Co ltd
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Guangzhou Yuanyin Environmental Technology Co ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B9/00Auxiliary systems, arrangements, or devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

The invention relates to the field of steam heat supply, in particular to a variable-pressure steam thermodynamic cycle system, which comprises a regulating valve, heat utilization equipment, a pressure limiting device, a steam-water separator, a pressure boosting device and a condensate recovery device, wherein a steam conveying pipe is connected into a plurality of heat utilization equipment which are arranged in parallel and are respectively provided with the regulating valve and the pressure limiting device, the heat utilization equipment is connected into the steam-water separator through a condensate collecting pipe, after the heat utilization equipment passes through the steam-water separator, steam in the heat utilization equipment is connected into the steam conveying pipe through the pressure boosting device for cyclic utilization, and condensate is connected into the condensate recovery device; the pressure limiting device is a closed hollow container capable of storing condensed water, the container is provided with an inlet and an outlet, and the pressure of the outlet is regulated by pressure limiting holes with different sizes.

Description

Pressure-variable steam thermodynamic cycle system
Technical Field
The invention relates to the field of steam heat supply, in particular to a steam thermodynamic cycle system.
Background
With the increasingly severe environmental protection requirements of the nation, industrial boilers of 35t/h and below are dismantled, and more enterprises begin to use outsourcing steam; without a boiler, the condensate water cannot be recycled to the boiler, so that the waste heat of the steam thermodynamic system is difficult to effectively recycle.
Description of conventional trap technology currently employed:
in a conventional steam system (see fig. 2), high-pressure steam in a main steam pipe a passes through a regulating valve B to enter a heat utilization device C, and the pressure in each device is continuously changed. The steam is thermally released and condensed in the heat utilization equipment C, the condensed water and a small amount of steam enter the condensed water collecting pipe E through the drain valve Da, then the condensed water is connected into the condensed water tank F, the flash evaporation steam is directly discharged, and the condensed water is pressurized and conveyed by the water pump G for recycling.
The prior art has the following defects:
in the existing steam heating system, each heating device is at least provided with one drain valve. The drain valve has bad working conditions, frequent action, easy damage and short effective life, and causes steam leakage loss;
when the steam condensate in the saturated state passes through the circulation hole of the drain valve, flash steam is generated. Because the back pressure of the system allowed by the operation of the drain valve is low, the low-pressure flash steam is difficult to recover, so that the heat energy waste is large;
the leaked new steam and condensed water flash steam flood the condensed water pipeline, so that the back pressure is increased to influence the work of the drain valve, the drain valve has to be discharged to the air, the system is opened, and the energy waste is serious.
Disclosure of Invention
The invention aims to provide a variable pressure steam thermodynamic cycle system, which is also a thermodynamic cycle system with the steam pressure inside a heat device under the working condition of continuous change, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a variable-pressure steam thermodynamic cycle system comprises a regulating valve, a heat utilization device, a pressure limiting device, a steam-water separator, a pressure boosting device and a condensate recovery device, wherein a steam conveying pipe is connected into a plurality of heat utilization devices which are arranged in parallel and are respectively provided with the regulating valve and the pressure limiting device, the heat utilization devices are connected into the steam-water separator through a condensate collecting pipe, steam in the steam conveying pipe is connected into the steam-water separator through the pressure boosting device, and condensate is connected into the condensate recovery device; the pressure limiting device is a closed hollow container, a condensate inlet and a condensate outlet are arranged on the container, and the pressure of the condensate outlet is regulated by a pressure limiting hole arranged in the condensate outlet.
The utility model provides a vary voltage steam thermodynamic cycle system, condensate water recovery unit includes the regulation jar body, import, regulation ball valve, guide way, support, floater, valve mouth, communicating pipe, gas vent, carries jar body, export, connect through communicating pipe between the regulation jar body and the transport jar body, the port that is located on the regulation jar body communicating pipe is equipped with the valve mouth, and the floater in the regulation jar body can follow the support and remove, and the regulation jar body is equipped with import, gas vent, and the import department is equipped with the guide way, and the regulation ball valve is followed the guide way activity, the export setting is on carrying jar body.
Compared with the prior art, the invention has the beneficial effects that:
the pressure limiting device is adopted to replace the drain valve, no moving part exists in the pressure limiting device, the reliability is high, and the problems that the valve core of the drain valve is frequently damaged, the service life is short and the management is difficult are solved;
the condensed water recovery system device operates under high back pressure, so that a small amount of leaked steam and flash steam have good circulating recovery conditions, the pressure boosting recovery is easy, and the problem of difficult waste heat recycling is solved;
and the leaked steam and the flash steam are subjected to pressure boosting utilization, so that the energy utilization efficiency of the system is improved.
Drawings
FIG. 1 is a diagram of a system of the present invention;
FIG. 2 is a diagram of a conventional steam system;
FIG. 3 is a schematic view of a pressure limiting device according to the present invention;
FIG. 4 is a schematic view of a condensate recovery apparatus of the present invention;
in the figure: A. a steam delivery pipe; B. a regulating valve; C. using a heating device; da. drain valve; db. pressure limiting device; E. a condensate header; F. a condensation tank; G. a water pump; H. a steam-water separator; I. a boosting device; J. a condensed water recovery device; 1. adjusting the tank body, 2. An inlet; 3. adjusting a ball valve; 4. a guide groove; 5. a support; 6. a floating ball; 7. a valve mouth; 8. a communicating pipe; 9. an exhaust port; 10. conveying the tank body; 11. an outlet; 12. a pressure limiting tank body; 13. a condensate inlet; 14. a condensate outlet; 15. and a pressure limiting hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides a technical solution:
a variable-pressure steam thermodynamic cycle system comprises a regulating valve B, a heat utilization device C, a pressure limiting device Db, a steam-water separator H, a pressure boosting device I and a condensate recovery device J, wherein a steam conveying pipe A is connected into a plurality of heat utilization devices C which are arranged in parallel and are respectively provided with the regulating valve B and the pressure limiting device Db, the heat utilization devices C are connected into the steam-water separator H through a condensate collecting pipe E, after the steam passes through the steam-water separator H, steam in the steam is connected into the steam conveying pipe A through the pressure boosting device I, and condensate is connected into the condensate recovery device J; the booster device I can be a mechanical booster fan or a steam injection heat pump, and is connected into the steam conveying pipe A for recycling after the pressure is increased, so that the effect of saving steam is achieved.
The working flow of the variable pressure steam thermodynamic cycle system comprises the following steps: the high-pressure steam in the steam delivery pipe A enters the heat utilization equipment C through the regulating valve B, and the pressure in each equipment is in a continuously changing state. The steam is subjected to heat release and condensation in the heat utilization equipment C, condensed water and a small amount of steam pass through the pressure limiting device Db, the pressure is reduced, the condensed water enters the condensed water collecting pipe E, then the condensed water enters the steam-water separator H, after the steam-water separation, the pressure of the steam in the condensed water is increased through the pressure increasing device I, and then the steam is introduced into the steam conveying pipe A for recycling, so that the effect of saving the steam is achieved; and the condensed water in the steam-water separator H is recycled through a condensed water recycling device J. The condensation water recovery device J is a pressure type condensation water recovery device with pressure and liquid level adjusting functions, so that condensation water can continuously climb, and the condensation water is easy to convey and recycle.
The pressure limiting device Db is a closed container, a condensate inlet 13 and a condensate outlet 14 are arranged on the pressure limiting tank body 12, a pressure limiting hole 15 is arranged in the condensate outlet 14, and the adjustment of the steam pressure is realized through different sizes of the pressure limiting hole 15. The device has no moving parts, can not be damaged, is safe to use and has high reliability.
The condensate water recovery device J comprises an adjusting tank body 1, an inlet 2, an adjusting ball valve 3, a guide groove 4, a support 5, a floating ball 6, a valve nozzle 7, a communicating pipe 8, an exhaust port 9, a conveying tank body 10 and an outlet 11, wherein the adjusting tank body 1 and the conveying tank body 10 are connected through the communicating pipe 8, the valve nozzle 7 is arranged at a port of the communicating pipe 8 on the adjusting tank body 1, the floating ball 6 in the adjusting tank body 1 can move up and down along the support 5 along with fluctuation of the liquid level, the adjusting tank body 1 is provided with the inlet 2 and the exhaust port 9, the guide groove 4 is arranged at the inlet 2, the adjusting ball valve 3 floats along with the liquid level and moves along the guide groove 4, and the outlet 11 can be arranged at the top end, the side or the bottom of the conveying tank body 10 according to site installation conditions.
Working procedure of the condensed water recovery device J: the adjusting ball valve 3 can automatically adjust the pressure entering the adjusting tank body 1, and the inlet 2 is blocked by self gravity to prevent the condensed water in the tank body from flowing back. The guide groove 4 can keep the movement track of the adjusting ball valve 3. The support 5 is used for supporting the floating ball 6, preventing the floating ball 6 from sliding down or displacing in a large range and ensuring the sealing of the valve mouth 7. Along with the rising of the liquid level in the regulating tank body 1, the floating ball 6 is separated from the valve mouth 7 due to upward buoyancy, and the condensed water in the pipe flows into the conveying tank body 10 through the communicating pipe 8 and is discharged from the outlet 11; when the water level in the regulating tank body 1 drops, after the floating ball 6 loses buoyancy, the floating ball 6 moves along the support 5 to reset, the spherical surface of the floating ball 6 plugs the valve mouth 7, and the communicating pipe 8 is closed.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. The utility model provides a vary voltage steam thermodynamic cycle system, including governing valve (B), with thermal equipment (C), pressure limiting device (Db), catch water (H), booster unit (I) and condensate recovery unit (J), steam delivery pipe (A) inserts a plurality of parallel arrangement and is furnished with thermal equipment (C) of governing valve (B) and pressure limiting device (Db) respectively, access catch water (H) through condensate water header (E) again, behind catch water (H), steam among them passes through booster unit (I) and inserts steam delivery pipe (A) again, condensate then inserts condensate recovery unit (J), its characterized in that: the pressure limiting device (Db) is a closed hollow container, a condensate inlet (13) and a condensate outlet (14) are arranged on the container, and the pressure of the condensate outlet (14) is regulated by a pressure limiting hole (15) arranged in the condensate outlet (14); the condensate recovery device (J) comprises a regulating tank body (1), an inlet (2), a regulating ball valve (3), a guide groove (4), a support (5), a floating ball (6), a valve nozzle (7), a communicating pipe (8), an exhaust port (9), a conveying tank body (10) and an outlet (11), wherein the regulating tank body (1) and the conveying tank body (10) are connected through the communicating pipe (8), the port of the communicating pipe (8) positioned on the regulating tank body (1) is provided with the valve nozzle (7), the floating ball (6) in the regulating tank body (1) can move along the support (5), the regulating tank body (1) is provided with the inlet (2) and the exhaust port (9), the guide groove (4) is arranged at the inlet (2), the regulating ball valve (3) moves along the guide groove (4), and the outlet (11) is arranged on the conveying tank body (10).
CN201810750578.7A 2018-07-10 2018-07-10 Pressure-variable steam thermodynamic cycle system Active CN108716862B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810750578.7A CN108716862B (en) 2018-07-10 2018-07-10 Pressure-variable steam thermodynamic cycle system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810750578.7A CN108716862B (en) 2018-07-10 2018-07-10 Pressure-variable steam thermodynamic cycle system

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CN108716862B true CN108716862B (en) 2024-02-09

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CN107289327A (en) * 2017-07-31 2017-10-24 华中科技大学 A kind of liquid nitrogen buffering liquid supply device of multichannel rate controlling
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