CN2503310Y

CN2503310Y - Hydrophobic recovery device for power plant low-pressure heater

Info

Publication number: CN2503310Y
Application number: CN 01252427
Authority: CN
Inventors: 王哲; 钱力
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-10
Filing date: 2001-11-10
Publication date: 2002-07-31
Anticipated expiration: 2011-11-10

Abstract

The utility model discloses a drain recovery device suitable for a low pressure heater of a power plant, comprising a tank body, an outlet pipe which is provided with a cut-off valve and arranged on a lower wall of the tank body, an inlet pipe which is provided with the cut-off valve and arranged on a top wall of the tank body and a three-way pipe; the three-way pipe is respectively connected with a steam exhaust pipe and a steam inlet pipe through a triple valve; a condenser is arranged on the steam exhaust pipe. Because of adopting the above-mentioned structure, the utility model has the following advantages: first, because of adopting the single tank body and a non-rotating part, a phenomenon of the cavitation does not occur so as to guarantee the normal work of the low pressure heater; second, the triple valve and the cut-off valve are adopted to open and close a steam pipe and a water pipe with a simple and reliable operation; third, the arrangement of the condenser on the steam exhaust pipe makes the steam exhausted from the steam exhaust pipe is discharged into a steam chamber of the low pressure heater after condensation so as to guarantee the operating mode of the low pressure heater from being influenced; fourth, the heat and the drained water are recovered totally and completely.

Description

Be applicable to the hydrophobic recovering device of power plant's low-pressure heater

Technical field:

The utility model relates to a kind of hydrophobic recovering device, relates to a kind of hydrophobic recovering device that is applicable to power plant's low-pressure heater specifically.

Background technique:

Present domestic power plant is to the 25MW--300MW unit, especially all adopts in the technological design of 25MW, 50MW, 125MW type unit and squeezes into the technology that condensing water conduit carries out heat? recovery by drainage pump with the afterbody low-pressure heater is hydrophobic.But owing to be subjected to the restriction (being in negative pressure, saturated-water phase) of this hydrophobic self-characteristic, make drainage pump very easily produce cavitation and cause damage.Therefore, the hydrophobic vapour condenser that all is back to of above-mentioned final stage so not only loses a large amount of heat energy in vain in actual motion, simultaneously because these hydrophobic flows that need cooling to increase the vapour condenser circulating waters again, from and increased and used electric consumption.

Summary of the invention:

The purpose of this utility model provides a kind of hydrophobic recovering device that is applicable to power plant's low-pressure heater with regard to being at above-mentioned existing in prior technology deficiency.

The utility model purpose can take following technical measures to realize:

The utility model comprises tank body, is arranged on the outlet pipe that has check valve of described tank body diapire, and the tank body roof is provided with an intake pipe and a three-way pipe that has a check valve; Described three-way pipe connects an exhaust steam pipe and a steam inlet pipe respectively by three-way valve; Described exhaust steam pipe is provided with a condenser.

In order to guarantee the safety of described tank body, described tank body is provided with a safety valve; The impulse force of steam when weakening steam discharge, described exhaust steam pipe is provided with restricting orifice.

Because the utility model adopts the outlet pipe that has check valve in the setting of described tank body diapire, be separately positioned on the intake pipe that has check valve and a three-way pipe of described tank body roof, and the three-way valve that on described three-way pipe, is provided with, and, make to the utlity model has following advantage by this three-way valve steam inlet pipe that connects respectively and these technical measures of exhaust steam pipe that have a condenser:

One, owing to adopt single tank body and do not have rotating component, thereby can not produce cavitation phenomenons, guarantee the proper functioning of described low-pressure heater, and simple in structure, low cost of manufacture;

Two, adopt three-way valve and check valve to carry out opening and closing of vapour, water pipe, reliable operation and control simple;

Three, owing to be provided with condenser on outlet pipe, feasible steam of discharging by outlet pipe has guaranteed that through entering the steam chest of low-pressure heater after the condensation operating mode of low-pressure heater is unaffected;

Four, heat, hydrophobic recovery are completely.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Embodiment:

The utility model is done one below in conjunction with accompanying drawing and is described in detail:

As shown in the figure, the utility model comprises tank body 1, is arranged on the outlet pipe that has check valve 32 of described tank body 1 diapire, and tank body 1 roof is provided with an intake pipe 4 and a three-way pipe 5 that has a check valve 6; Described three-way pipe 5 connects an exhaust steam pipe 8 and a steam inlet pipe 9 respectively by three-way valve 7; Described exhaust steam pipe 8 is provided with a condenser 10, is provided with a restricting orifice 11 in exhaust steam pipe 8 inner chambers, and in order to guarantee safety, tank body 1 is provided with a safety valve 12.

Working principle of the present utility model is as follows:

As shown in the figure, the outlet pipe that has check valve 32 that is arranged on described tank body 1 diapire is communicated with the hydroecium pipeline of low-pressure heater, the intake pipe that has check valve 64 that is arranged on tank body 1 roof is connected with the equipment drain pipe of low-pressure heater, the outlet of described condenser 10 is communicated with the steam chest of low-pressure heater, steam inlet pipe 9 is inserted high pressure steam.During work, three-way valve 7 is closed steam inlet pipe 9, the equipment of low-pressure heater is hydrophobic to be entered in the tank body 1, when hydrophobic liquid level reaches setting value, check valve 6 is closed intake pipe 4, meanwhile three-way valve 7 is closed outlet pipe 8 and is opened steam inlet pipe 9, and check valve 3 is opened outlet pipe 2, and the backwater in the tank body 1 is pressed in the hydroecium of low-pressure heater under the high-pressure steam pressure effect; After backwater arrange in the tank body 1, three-way valve 7 was closed steam inlet pipe 9, opened the steam chest that low-pressure heater sent the steam of tank body 1 interior remnants after by restricting orifice 11, condenser 10 condensations back to by outlet pipe 8; After this repeat above-mentioned working procedure.

Claims

1, a kind of hydrophobic recovering device that is applicable to power plant's low-pressure heater, it is characterized in that: it comprises tank body (1), be arranged on the outlet pipe that has check valve (3) (2) of described tank body (1) diapire, tank body (1) roof is provided with an intake pipe (4) and a three-way pipe (5) that has check valve (6); Described three-way pipe (5) connects an exhaust steam pipe (8) and a steam inlet pipe (9) respectively by three-way valve (7); Described exhaust steam pipe (8) is provided with a condenser (10).

2, hydrophobic recovering device according to claim 1 is characterized in that: described outlet pipe (8) is provided with a restricting orifice (11).

3, hydrophobic recovering device according to claim 1 is characterized in that: described tank body (1) is provided with a safety valve (12).