Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F22—STEAM GENERATION
  • F22G—SUPERHEATING OF STEAM
  • F22G3/00—Steam superheaters characterised by constructional features; Details or component parts thereof
  • F22G3/003—Superheater drain arrangements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
  • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers

Definitions

• the invention relates to a device for dewatering the superheater heating surfaces of a steam generator with at least one single or multi-stage, single or multi-flow and dewaterable superheater, the drainage or drainage lines of a superheater stage, preferably measuring the lowest superheater stage, are equipped with a water level device and all Drainage lines are connected to a drainage collector which is geodetically lower than the water level measuring device.
• This object is achieved in that check valves are arranged in those drainage lines which are not equipped with a water level measuring device, all drainage lines forming a communicating pipe system together with the drainage collector and the drainage collector being emptied via a shutoff valve controlled by the water level measuring device.
• This solution has the advantage that - through the principle of the communicating tubes - the drainage of all stages of a superheater can be monitored with only one working fluid level measuring device.
• the drawing shows the diagram of a double-flow, multi-stage superheater.
• the superheater stages 1, 2 and 3 are provided with inlet collectors 4, 5 and 6 and outlet collectors 7, 8 and 9.
• Saturated steam from an evaporator of a steam generator, not shown flows through lines 26 to superheater inlet header 4.
• Superheater stages 1 and 2 and superheater stages 2 and 3 are connected to one another by lines 11 and 10, respectively.
• Superheater steam leaves superheater stage 3 through lines 27 and flows to a turbine, not shown.
• the inlet collectors 4, 5 and 6 are provided with drainage lines 14, 15 and 13, 16 and 12, 17, respectively, which each open into the drainage collector 23.
• the drainage collector 23 is provided with the drain line 24 equipped with a shut-off valve 25.
• the drainage lines 12, 13, 15, 16 and 17 are each provided with a check valve 22 and the drainage line 14 with a water level measuring device 18.
• a line 21b branches off from the drainage line 14 downstream of the water level measuring device 18 and is also equipped with a shut-off valve 19 and leads to the drain collector 20.
• a line 28 leads from the drain collector 20 to an expansion device (not shown).
• the valves 19 are used to drain condensate into the flash tank when it is turned off or to drain water after pressure tests have been carried out.
• the condensate obtained in the superheater stages 1, 2 and 3 passes from the inlet collectors 4, 5 and 6 through the drainage lines 12, 13, 14, 15, 16 and 17 to the drainage collector 23. If the drainage collector 23 contains condensate is filled, the condensate rises into the drainage line 14.
• the check valves 22 arranged in lines 12, 13, 15, 16 and 17 prevent the condensate from flowing back into these lines.
• the Ar beitsstoff water level measuring device 18 causes the shutoff valve 25 to open.
• the shutoff valve 25 closes again. This process is repeated until new condensate no longer exceeds the maximum level.
• the dewatering line 14 with the water level measuring device 18 can also be connected to a point of the superheater heating surfaces, which only serves to equalize the pressure, which does not have to be dewatered.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Control Of Steam Boilers And Waste-Gas Boilers (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6162634

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Citations (2)

• 1982
  • 1982-05-04 DE DE3216588A patent/DE3216588C1/de not_active Expired
• 1983
  • 1983-05-04 AU AU14784/83A patent/AU561180B2/en not_active Ceased
  • 1983-05-04 JP JP58501411A patent/JPS59500733A/ja active Granted
  • 1983-05-04 WO PCT/CH1983/000054 patent/WO1983003886A1/de unknown
  • 1983-05-04 FR FR8307465A patent/FR2526523B1/fr not_active Expired
  • 1983-06-14 IN IN401/DEL/83A patent/IN159827B/en unknown

Patent Citations (2)

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