[background technology]
Thermal powerplant is along with the increase of generating capacity, and is also increasingly high to the requirement of aqueous vapor quality, and the high parameter fired power generating unit is very strict to the requirements for quality of extra feed, major requirement conductivity≤0.2 μ S/cm (25 ℃), SiO
2≤20 μ g/L.Present each large thermal power plant desalination water manufacturing system goes out water conductivity and basically all maintains below the 0.01 μ S/cm.But demineralized water is after the liquid bunkerage stores, and the minimum high purity water of resiliency very easily receives CO in the air
2, oxygen and dust denier or short time pollute.Airborne CO
2Generate carbonic acid (H immediately after getting into demineralized water
2CO
3), make sharply decline of pH value in the pure water, even alkaline matters such as Xiang Shuizhong adding ammonia improve pH, also just with CO
2Changed into (NH
4)
2CO
3, do not remove CO
2As these CO that dissolves in
2After salt solution entering therrmodynamic system, can cause the corrosion of therrmodynamic system, make Fe, Cu equal size in the water high, increase corrosion product, influence the long-term safety operation of unit.Therefore it is very necessary the liquid bunkerage being implemented sealing.
The liquid bunkerage is implemented one of leak free method exactly the air on the water surface in the equipment all is replaced by clean N
2, the water in the equipment is not contacted with outside air, thereby reaches the purpose that keeps water quality.This technology is very high to the reliability requirement of the safety measure that is provided with on the container.Otherwise can cause liquid bunkerage internal pressure to rise or locate vacuum state and cause blast because safety device is malfunctioning.Because the liquid bunkerage will be worked under certain pressure, thereby the manufacturing of liquid bunkerage is also had exacting requirements, and when liquid changes, wants lot of consumption N
2, so the over-the-road expense of this technology is higher.
Another kind method is on the liquid level of storage bin, to add a seal cover cap, promptly floating top, and it can fluctuate along with the fluctuation of water level.For guarantee and storage bin between leak tightness, the edge on floating top must well contact with the inwall of storage bin.At present the version on floating top has two kinds, and a kind of is the flexible floating top of membrane type, is a big film between wherein; Periphery is a floating ring, and the making more complicated of this floating ring comprises numerous plastic fasteners such as pressure ring and seal ring up and down; The own intensity of fastener that plastic material is made is limited, after use after a while, is prone to take place the phenomenon of fracture; Life-span is shorter, and its seal ring has certain intensity, easy and storage bin generation bite phenomenon; The coverage rate on the floating top of influence, and after rubbing for a long time with the inwall of storage bin, can directly influence the service life of inside coating or protective layer.Another kind is the flexible floating top of individual layer membrane type, and the centre is a monoblock film foamed plastic, and periphery is the flexible sealing band; Sealing band and film fuse, and the material that constitutes floating top mainly is foamed plastic and adhesive agent, because its foamed plastic is flexible; The flexible contact takes place with the inwall of liquid storage bin in the flexible floating top of this individual layer membrane type, but the marginal portion rigidity on its whole floating top, elasticity deficiency, easy deformation; Thereby reduced the coverage rate on floating top, influenced the sealing effectiveness of liquid.
[utility model content]
Based on this, be necessary to provide a kind of hydraulic seal effect equipment preferably.
A kind of hydraulic seal bunkerage; Comprise storage bin and be positioned at the floating top of said storage bin; Said floating top comprise with the floating ring of the inwall closed contact of said storage bin and be positioned at the middle part of said floating ring and all around with the close-connected flexible membrane of said floating ring; Have cavity in the said floating ring, said floating top also comprises air inlet pipe, and said air inlet pipe communicates with said cavity, is used for charging into gas to said floating ring.
In a preferred embodiment, said gas is nitrogen.
In a preferred embodiment, said floating ring is an annular arrangement.
In a preferred embodiment, said hydraulic seal bunkerage also comprises collecting tube, and an end of said collecting tube is connected with said flexible membrane, the other end leads to outside the said storage bin.
In a preferred embodiment, the sidewall of said storage bin bottom is provided with an outage, and said collecting tube passes said outage, and the edge closed contact of the outer wall of said collecting tube and said outage.
The floating top of aforesaid liquid sealing bunkerage comprises flexible membrane and the floating ring that is filled with gas; After floating ring charges into gas through air inlet pipe; Produce with the inwall of storage bin and flexiblely to contact and have a certain intensity; Make the inwall closed contact of floating top and storage bin, therefore, the sealing effectiveness of this hydraulic seal bunkerage is better.
[specific embodiment]
Below in conjunction with accompanying drawing and specific embodiment the flexible floating top of membrane type is further specified.
Like Fig. 1 and shown in Figure 2, the hydraulic seal bunkerage 100 of an embodiment comprises storage bin 110, floating top 120 and collecting tube 130.
Storage bin 110 is preferably PVC or glass-felt plastic material, and its profile is preferably cylinder, and inner wall smooth does not have protrusion.The sidewall that leans on the bottom of storage bin 110 is provided with feed tube 112 and drain pipe 114.Feed tube 112 and drain pipe 114 lay respectively at the relative both sides of storage bin 110.Feed tube 112 is used for charging into to storage bin needs leak free liquid, drain pipe 114 to be used for the fluid discharge of storage bin 110 is come out.
Floating top 120 is positioned at storage bin 110, and floats on the liquid, and floating top 120 comprises floating ring 122, flexible membrane 124 and air inlet pipe 126.
Floating ring 122 is an annular arrangement, and it has cavity 1222.Be filled with gas in the cavity 1222, this gas can be air, nitrogen etc., is preferably nitrogen.The material of floating ring 122 is a high-molecular organic material, and silica gel for example, the floating ring 122 of this material preparation are very soft, and ductility is good, and precipitate is few, and is wear-resisting, high resilience.
Flexible membrane 124 is roughly circle, its be positioned at floating ring 122 the middle part and with floating ring 122 around leak-tight joint.
Floating ring 122 all has enough air-tightness and water tightness with flexible membrane 124; Make liquid that can not see through floating ring 122 and flexible membrane 124 and be penetrated into the surface on floating top 120; And the air on 120 surfaces, floating top also can not see through floating ring 122 and flexible membrane 124 contacts with liquid, thereby reaches the effect of seal fluid, air-isolation.Gas filed floating ring 122 and the density of the flexible membrane 124 that is connected as a single entity are significantly smaller than the fluid density of required storage in the storage bin 110, and floating top 120 is floated on above the liquid.The floating ring 122 that is filled with gas produces flexible the contact with the inwall of storage bin 110; Setting suitable inflation pressure makes floating ring 122 have certain intensity and elasticity; When fluctuate up and down with liquid in floating top 120, can guarantee the closed contact of floating ring 122 and storage bin 110 inwalls, can not produce excessive friction force again with storage bin 110 inside faces; Avoided the bite on floating top 120, and the floating ring 122 that is filled with gas has enough intensity and make floating top 120 not yielding.Because the floating ring 122 after the inflation has cooresponding elasticity; Even therefore storage bin 110 produces certain deformation in processing or use, floating ring 120 also can adapt to automatically, can be free to slide with liquid surface lifting; And with storage bin 110 inwall closed contacts, play good sealing function.
Air inlet pipe 126 communicates with cavity 1222, is used for charging into gas to floating ring 122.Floating ring 122 also can discharge gas through air inlet pipe 126.In the time of the needs seal fluid, in floating ring 122, charge into gas through air inlet pipe 126, in the time of maintenance hydraulic seal bunkerage 100, can the gases in the floating ring 122 be discharged through air inlet pipe 126, will float top 120 and roll.Air inlet pipe 126 is provided with control cock 1262 away from an end of floating ring 122.Control cock 1262 is used to regulate the charged pressure of nitrogen, when the nitrogen in the floating ring 122 reaches capacity, only needs to regulate control cock 1262 and just can guarantee to keep in the floating ring 122 suitable pressure.
One end of collecting tube 130 is connected with flexible membrane 124, the other end leads to outside the storage bin 110.Because flexible membrane 124 is flexible; Under the action of gravity of himself; Its center is prone to produce one " low spot ", and promptly so-called " the bottom of a pan " phenomenon is when there is liquid on flexible membrane 124 surfaces; Liquid just can be discharged outside the storage bins 110 through collecting tube 130, avoided floating top 120 around to the phenomenon of center turnup.Collecting tube 130 is a kind of air-tightness and the good flexible pipe of water tightness, can nature in liquid sagging, and collecting tube 130 is positioned at the centre of flexible membrane 124, and liquid can self-generatingly be flowed out from collecting tube 130.In a preferred embodiment, storage bin 110 sidewalls bottom is provided with an outage 116, and collecting tube 130 passes outage 116, the edge closed contact of the outer wall of collecting tube 130 and outage 116.So both guaranteed the leak tightness of hydraulic seal bunkerage 100, made again that the liquid on the floating top 120 can the self-generating outside that flows to storage bin 110 through collecting tube 130.The size shape of the outer wall of collecting tube 130 is identical with the size shape of outage 116, can make things convenient for the length of regulating collecting tube 130 in the storage bin 110 as required.
Aforesaid liquid sealing bunkerage 100 concrete uses as follows:
To float top 120 is transported in the storage bin 110; Air inlet pipe 126 and collecting tube 130 are installed, open control cock 1262, in air inlet pipe 126, feed nitrogen in floating ring 122; Until floating ring 122 expand and with the inwall closed contact of storage bin 110, close control cock 1262.Feed liquid through coolant inlet pipe 130 to the bottom of storage bin 110, floating top 120 floats over above the liquid, thus the contacting of secluding air and liquid.When on flexible membrane 124 surfaces liquid being arranged, liquid gets into collecting tube 130 and is discharged to outside the storage bin 110.When hydraulic seal bunkerage 100 needs maintenance, open control cock, the nitrogen in the floating ring 122 through discharging in the air inlet pipe 126, will be floated top 120 then and rolls and stack, after maintenance is accomplished, will float top 120 and launch, and floating ring 122 is charged into nitrogen can recover.
The floating top 120 of aforesaid liquid sealing bunkerage 100 comprises flexible membrane 124 and the floating ring 122 that is filled with gas; After floating ring 122 charges into gas through air inlet pipe 126; Produce with the inwall of storage bin 110 and flexiblely to contact and have a certain intensity; Make the inwall closed contact of floating top 120 and storage bin 110, therefore, the sealing effectiveness of this hydraulic seal bunkerage 100 is better.
And aforesaid liquid sealing bunkerage 100 is simple in structure, during installation the floating top 120 of unaerated is directly put into from the manhole of storage bin 110, collecting tube 130 is inserted the outage 116 of storage bin 110; 122 inflations get final product to floating ring then; Need not equipment such as power cutting, welding, lifting, and need not support, easy for installation; With low cost, long service life.
The above embodiment has only expressed several kinds of embodiments of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection domain of the utility model.Therefore, the protection domain of the utility model patent should be as the criterion with accompanying claims.