Background technology
In the industry and heating process of using steam, the steam that produces in boiler transfers to various industrial technology occasions with high-temperature high-pressure state by pipeline, thus the energy in the applying steam.
Some vapour system parts as blowdown vessel, has open-ended steam permeability cell, is used for steam is let out to atmosphere.Way is the emptying cap to be installed with assurance steam is disposed in the atmosphere safely with lower speed on the steam permeability cell at present.
The shell of existing emptying cap has baffle plate, and described baffle arrangement is to stop the steam that enters described shell.Described baffle plate separates the moisture content that carries in the steam from steam.Gan Zao steam is released into atmosphere by the outlet in the described shell then, and isolated water enters drainpipe, thereby drains from vapour system.
Though this emptying cap is suitable for some application scenarios, and some shortcomings are also arranged.For example, the whole moisture content that can not separate vapour carries.And the essential pipeline that adopts of emptying cap connects, and installs very consuming time.
Therefore be necessary to provide a kind of improved emptying cap, can improve the separative efficiency of moisture content in the steam, or reduce installation difficulty, perhaps improve this 2 point simultaneously.
Summary of the invention
Describe according to an aspect of the present invention, the invention provides a kind of emptying cap that is used for vapour system, comprising: define emptying cap chamber and and have a cap body of emptying cap outlet; Has the steam inlet conduit (steam inlet pipe) that opens into the steam (vapor) outlet in the emptying cap chamber; And baffle plate steam (vapor) outlet above indoor at the emptying cap; And between emptying cap chamber and steam steam inlet pipe, provide leakage path that fluid is communicated with wherein in use, steam (vapor) outlet enters emptying cap chamber with discharge of steam, steam impinges upon on the baffle plate, the liquid water that carries in the steam is separated thus, liquid water is collected in emptying cap chamber, and is back to the steam inlet conduit through leakage path.
It is indoor that the steam inlet conduit may extend into the emptying cap.Leakage path can be included in the perforate that the steam steam inlet pipe extends into part in the emptying cap chamber.Can have many leakage paths, every all has one to extend in the emptying cap chamber perforate in the part at the steam steam inlet pipe.
Described cap body can comprise a bottom shell wall, towards leakage path import inclined bottom shell wall.
Described steam steam inlet pipe can comprise an external part, is used for described steam steam inlet pipe is attached to open-ended steam permeability cell.The position of described steam (vapor) outlet can make steam discharge with approximately perpendicular direction in use.
But described baffle plate is the level of approximation position in use.It is the plane that described baffle plate can be similar to.It is circular that described baffle plate can be similar to.
Described housing can comprise the top shell wall, and described emptying cap outlet is arranged in the shell wall of top.
Described emptying cap outlet can be positioned at described baffle plate top.Described baffle plate can be arranged in the vapor flow path between the outlet of described steam (vapor) outlet and described emptying cap.When the top is seen, described baffle plate may extend into outside the described steam (vapor) outlet.
Described baffle plate can comprise impingement region, and steam impinges upon on the described impingement region during use, and is arranged on the projection between the edge of described impingement region and described baffle plate.The radius of curvature that described projection has can in use make steam flow to described emptying cap outlet around described projection, and water droplet is disposed to the described emptying cap chamber from described projection.The radius of curvature of described projection can be between about 4 to 7mm.The radius of curvature of described projection can be about 5mm.The embowment that can in leaving the direction of described impingement region, make progress of described projection, and finish at the edge of described baffle plate.When the top is seen, described projection can be positioned at the position outside the described steam (vapor) outlet.
According to another aspect of the present invention, the invention provides a vapour system, comprise the steam permeability cell, described steam permeability cell has the emptying cap that meets any description of this paper.
The present invention can comprise any combination of function as referred to herein and/or limitation, the except combinations of mutually exclusive function.
The specific embodiment
As shown in Figure 1, emptying cap 10 comprises the cap body 12 that is provided with emptying cap outlet 14, and steam inlet pipe (or conduit) 16.Steam inlet pipe 16 is provided with flange 18, emptying cap 10 can be connected to open-ended steam permeability cell, and the steam conducting that described steam permeability cell will be to be discharged is to atmosphere.
Referring to Fig. 2 and 3, the cap body 12 of emptying cap 10 comprises top shell wall 20, bottom shell wall 22, and annular sidewall 24, so cap body 12 is near cylindrical.Cap body 12 comprises the first top 12a and the second bottom 12b.The part of top shell wall 20 and annular sidewall 24 constitutes the first top 12a.A part that comprises bottom shell wall 22 and annular sidewall 24 constitutes the second bottom 12b.Top and the bottom 12a, 12b are assembled together and form cap body 12.Cap body 12 limits emptying cap chamber 26,26 inside at cap body 12, emptying cap chamber.
Steam pipe opening 28 is located in the bottom shell wall 22 of cap body 12 bottom 12b and the axle collar 30 extends vertically from opening 28 places.The steam pipe opening 28 and the axle collar 30 and approximate cylindrical cap body 12 are coaxial.Steam inlet pipe 16 is arranged in opening 28, so that the axle collar 30 centers on and contacts with the outer surface of steam inlet pipe 16.The edge that steam inlet pipe 16 is provided with annular shoulder 29 and the axle collar 30 against.The top of steam inlet pipe 16 extend in the emptying cap chamber 26 and the openend on described top constitutes steam (vapor) outlet 15.The bottom of steam inlet pipe 16 extends to the outside of cap body 12 and the openend of described bottom constitutes steam inlet 17.The end of the bottom of steam inlet pipe 16 is provided with flange 18, and flange 18 can make emptying cap 10 be coupled to the terminal (not shown) of steam outlet pipe.
Steam inlet pipe 16 is provided with four and runs through inlet tube 16 tube wall escape orifices 32.The bottom shell wall 22 of escape orifice 32 and cap body 12 is on same horizontal line, and escape orifice is to be similar to 90 ° each other circumferentially at interval.The bottom shell wall 22 of cap body 12 radially slopes inwardly downwards towards steam inlet pipe 16 and escape orifice 32.Escape orifice 32 provides leakage path between emptying cap chamber 26 and steam inlet pipe 16.
Emptying cap outlet 14 is arranged in the top shell wall 20 of top 12a of cap body 12 and is coaxial with approximate circle cap body 12.Therefore, the outlet 14 of emptying cap is above steam inlet pipe outlet 15.
Baffle plate 34 is arranged in the emptying cap chamber 26 and is positioned at the top of steam (vapor) outlet 15 and the below of emptying cap outlet 14.Therefore, baffle plate 34 is arranged between steam (vapor) outlet 15 and the emptying cap outlet 14.In this embodiment, baffle plate 34 is an almost plane, and is in the approximately horizontal plane in use.Baffle plate 34 is a sub-circular and coaxial with cylindrical cap body 12.The diameter of circular baffle plate 34 is greater than the diameter of steam (vapor) outlet 15, and therefore when when the top is seen, the edge of baffle plate 34 extends to outside the steam (vapor) outlet 15.In this embodiment, approximately the diameter with emptying cap outlet 14 is identical for the diameter of circular baffle plate 34.
As shown in Figure 4, baffle plate 34 comprises center impingement region 35 and the projection 40 of the embowment that makes progress.Projection 40 is between the edge of impingement region 35 and baffle plate 34.In this embodiment, projection 40 is upwards ring edges of embowment of baffle plate 34.The radius of curvature of projection 40 is about 5mm in this embodiment.Yet in other embodiments, described radius of curvature can be between 4 to 7mm.Hereinafter will introduce the purpose of projection 40.
Baffle plate 34 is provided with three support members 36, and this support member is fixed on the edge of baffle plate 34 and each other with 120 ° circumferentially at interval.Support member 36 in axial direction extends and each support member 36 comprises one from the radially outwards outstanding antelabium 38 of the end of support member 36.Support member 36 is used for baffle plate 34 connections and is supported on cap body 12.Shown in Fig. 2 and 3, the antelabium 38 of support member 36 exports 14 edge join with the emptying cap and leans against on the top shell wall 20 of cap body 12, thus at cap body 12 upper support baffle plates 34.
During use, emptying cap 10 is attached to the openend (not shown) of steam permeability cell by flange 18.The steam permeability cell that described steam permeability cell can be the vapour system arbitrary portion, steam discharges from the steam permeability cell, or passes to atmosphere.Application example includes but not limited to the steam permeability cell of blowdown vessel, and the hot well cabinet is supplied with cabinet or pressure-driven pump.
Steam is introduced emptying cap 10 by the steam inlet 17 of steam inlet pipe 16.Then steam with approximately perpendicular direction from steam (vapor) outlet 15 discharging of steam inlet pipe 16 and enter emptying cap chamber 26.
As shown in Figure 5, the steam that steam (vapor) outlet 15 is discharged impinges upon on the impingement region 35 of horizontal baffle 34, and baffle plate 34 directly is positioned at the top of steam (vapor) outlet 15.When steam impinges upon on the baffle plate 34, be carried in the steam water droplet since surface tension therefore attached on the surface of baffle plate and from vapor stream, separate.Because the pressure between emptying cap chamber 26 and the atmosphere falls, steam flows also so the surface of radially outwards flowing and crossing baffle plate 34 to emptying cap outlet 14.Steam flows on baffle plate 34 surface, will be under surface tension effects attached to the water droplet on baffle plate 34 surfaces on the surface of baffle plate 34 radially to the pulling of the edge of baffle plate 34.
When steam arrived the projection 40 of baffle plate 34, steam was attracted to the projection 40 of baffle plate 34 and therefore flows and leave emptying cap 10 by the outlet of emptying cap around projection 40.Steam reaches in Koln under the effect of effect and flows around projection 40.Yet the water droplet that is attached to baffle plate 34 surfaces is too heavy and can't cross projection 40 under vapor action, therefore is discharged at projection 40 places.Because projection 40 is positioned at the outside of steam (vapor) outlet 15, these water droplets concentrate on the bottom of emptying cap chamber 26.Radially inwardly flowed to steam inlet pipe 16 by baffle plate 34 isolated water from steam along the downward-sloping bottom shell wall 22 of cap body 12.Isolated water flows through the inside that escape orifice (leakage path) 32 in the steam inlet pipe 16 enters pipe 16 then.Water flows downward and is back to vapour system along the inwall of steam inlet pipe 16 then.
Emptying cap 10 makes steam to arrange to atmosphere safely.This is the speed of steam because baffle plate 34 has slowed down, and the major part that steam carries water is separated from steam by baffle plate.What this caused discharging from emptying cap outlet almost is dry saturated steam.
Isolated liquid water in the steam is back to vapour system many benefits are provided.The water that uses in the vapour system contains the processing chemical substance that various helps improve systematic function.Must replenish these water with fresh water if water loses from system, and the fresh water that replenishes must be used these chemical substance treatment.Therefore, reduce the amount that has reduced the fresh water treatment chemical substance of adding system to from the water yield of vapour system loss.This escapable cost.And the water that loses from vapour system contains available heat, therefore with baffle plate isolated liquid water in the steam is returned the energy efficiency of the system that improved.
Further benefit is because isolated water is back to vapour system downwards along steam inlet pipe 16, so no longer need connect externally drained pipeline on emptying cap 10.This has reduced the quantity of pipeline and joint, thus minimizing expense and set-up time.
Compare traditional baffle plate, the projection 40 of baffle plate 34 can extract (or separation) more liquid water from steam.This is because Koln reaches effect steam is attracted to and flows around projection 40 at least in part, and forces water droplet to be discharged into emptying cap chamber 26.Projection 40 is selected specific radius of curvature for use, make the steam that flows through baffle plate 34 be attracted to projection 40 and mobile around projection 40, and water droplet is discharged simultaneously from projection 40.
Figure 6 shows that second embodiment of emptying cap 10.This embodiment is similar to first embodiment, and the top thickness that removes steam inlet pipe 16 increases.In addition, the bottom of steam inlet pipe 16 is not equipped with flange, therefore can receive on the steam permeability cell with other modes.