CN110345308A - A kind of valve and its method for preventing moisture condensation - Google Patents
A kind of valve and its method for preventing moisture condensation Download PDFInfo
- Publication number
- CN110345308A CN110345308A CN201910634122.9A CN201910634122A CN110345308A CN 110345308 A CN110345308 A CN 110345308A CN 201910634122 A CN201910634122 A CN 201910634122A CN 110345308 A CN110345308 A CN 110345308A
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- Prior art keywords
- valve
- heat tracing
- pipeline
- medium
- flue
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009833 condensation Methods 0.000 title abstract description 31
- 230000005494 condensation Effects 0.000 title abstract description 23
- 230000008676 import Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 2
- 210000003101 oviduct Anatomy 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000293679 Boraria media Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/222—Shaping of the valve member
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0209—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor the valve having a particular passage, e.g. provided with a filter, throttle or safety device
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0263—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor using particular material or covering means
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K49/00—Means in or on valves for heating or cooling
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/002—Electric heating means
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/005—Circulation means for a separate heat transfer fluid
- F16K49/007—Circulation means for a separate heat transfer fluid located within the obturating element
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lift Valve (AREA)
- Valve Housings (AREA)
- Details Of Valves (AREA)
Abstract
The present invention relates to a kind of valve and its methods for preventing moisture condensation.The valve, including valve body and valve plate, the valve plate has hollow cavity body, and the inner chamber body has heat tracing component, heat tracing is carried out to the inner chamber body, heat tracing temperature is not less than corresponding flue or medium temperature in pipeline or is greater than the flue or pipeline internal medium dew-point temperature.The present invention solves this field this global problem such as unavoidable valve moisture condensation, fouling, agglomeration all the time, and has significantly energy-saving, environmentally protective meaning.
Description
Technical field
The present invention relates to a kind of valves, more particularly to the method and corresponding construction that prevent valve from condensing.
Background technique
Valve requires zero leakage in many applications, including smoke machine entrance used in such as oil plant and some de-
Many valves used such as sulphur system and sulfur recovery system, in China, for the requirement of environmental protection, the requirement of national regulation leakage rate
It is zero alternatively, the VI grade in accordance with Unite States Standard seals.After valve is closed, if internal medium is hotter gas phase media,
Will make the side of valve plate contact hotter medium becomes hot wall, and the other side often becomes cold wall, hot wall and cold inside and outside valve plate
The presence of wall will lead to hot wall side moisture condensation.The water formed after moisture condensation can then generate many harm, comprising: the flue gas of sulfur-bearing is
When dry flue gas, and do not have corrosivity；But when its moisture content after encountering moisture condensation, the complexity such as S02, S03, sulfurous acid will form
Composition, and these compositions are often with there is extremely strong corrosivity.
For the valve plate of austenite stainless steel material, intercrystalline corrosion and dew point corrosion can be generated；For example, 316L is stainless
Steel can generate dew point corrosion.
Valve plate once corrodes, it will influences its sealing performance.
Meanwhile in the water for the formation that condenses and flue or pipeline after smoke reaction, it will caused to flue or pipeline very tight
The corrosion of weight, to generate the corrosion risk of chimney.
In addition, the water that moisture condensation is formed can be mixed and be reacted with impurity such as dust in flue or pipeline, to generate agglomeration
Or fouling, and then influence being closed or sealed for valve.
The gate valve for manufactory's production that the country has at present, has structure simple, low-cost advantage, but usually because of it
The measure or structure of moisture condensation are not prevented, and generates a series of harm after moisture condensation above-mentioned, and then influence it in sulfur-containing smoke gas
Flue or pipeline on the reliability that uses.
Heat seal wind is led to, although this structure using double board plug structures between two plates in domestic manufactory also
The harm of moisture condensation is avoided, but its shortcoming is also extremely obvious, i.e., using double plates, its structure is complicated, and cost increases；Together
When, double board plug structures are equal to more sealing surfaces, also increase the leakage rate of sealing air, will definitely increase air blower and
The power consumption of air heater further increases the operating cost of user so that the waste of the energy is larger.
Furthermore existing double leval jib butterfly valve, simple and ingenious structure, sealing effect is good, and shortcoming, which is lain also in, there is
Same problems mentioned above；Then when it is used for sulfur recovery facility, due to the presence of cold and hot wall, fouling is had on valve plate, even
Also the reliability for having fouling on valve seat, and then influencing the sealing of valve and using.
The cold and hot wall of valve causes the problem of moisture condensation generally existing as a result, and so far, above-mentioned to be generated due to moisture condensation
A series of problems has become the global problem of industry.
Summary of the invention
In view of the above problem present in the prior art, the present invention is directed to disclose a kind of method for preventing valve from condensing, together
When disclose the valve accordingly and prevent the structure of moisture condensation.
The technical scheme of the present invention is realized as follows:
A method of prevent valve from condensing, wherein the valve plate of the valve has hollow cavity body, and to the valve plate
Inner chamber body carries out heat tracing, and heat tracing temperature is not less than corresponding flue or medium temperature in pipeline or is greater than the flue or pipeline
Interior medium dew-point temperature.
Specifically, be respectively provided with the import and outlet of external heat tracing medium on the valve plate, external heat tracing medium is from institute
It states import and accesses the valve plate inner chamber body, lead to the flue or pipeline from the outlet；The external heat tracing medium can be with
It is quoted from extraneous heat seal wind.
Alternatively, being heated by the heating device for being installed on the valve plate inner chamber body to the inner chamber body.Specifically, institute
Stating heating device can be electric heater, steam heater or hotline heater or is packed into electricity in inner chamber body simultaneously
Heater and conduction oil.
The valve can be the gate valve perhaps valve of butterfly valve or double leval jib butterfly valve or other patterns.
Further, when the valve is gate valve, the described method for preventing valve from condensing, further include for
The outer chamber for accommodating valve plate carries out heat tracing, and heat tracing temperature is not less than corresponding flue or medium temperature in pipeline or is greater than institute
State flue or pipeline internal medium dew-point temperature.
Specifically, include the high-temperature medium in flue or pipeline to the heat tracing medium to the outer chamber heat tracing, stream
It is arranged at the intracorporal diversion component of the exocoel and realizes heat tracing, two ports of the diversion component are respectively communicated in flue；
It and/or include flowing through quoted from extraneous heat tracing medium and being arranged in the intracorporal heat tracing component realization heat tracing of the exocoel, the companion
Thermal part a port is connected to extraneous heat tracing medium source.
Further, tubular structure is respectively adopted in heat tracing component in the intracorporal diversion component of the exocoel and/or outer chamber
It coils in the outer wall of the outer chamber.
The present invention discloses the valves using above-mentioned anti-condensation method, have following corresponding structure: the valve
Door includes valve body and valve plate, wherein the valve plate has hollow inner chamber body；
Further include the heat tracing component of inner chamber body, heat tracing is carried out to the inner chamber body, heat tracing temperature is not less than corresponding cigarette
Medium temperature in road or pipeline is greater than the flue or pipeline internal medium dew-point temperature.
Further, further include insulating layer, be set on the inner chamber body inner wall and be situated between in the flue or pipeline
The side of mass flow downstream.
Specifically, the heat tracing component of the inner chamber body includes the pipeline and the heat tracing medium being connected to extraneous heat tracing medium
Import and outlet, the import and outlet be opened in the inner chamber body, be respectively used to access the extraneous heat tracing medium and
The heat tracing medium is led in corresponding flue or pipeline.
Further, the heat tracing component of the inner chamber body further include: baffle plate is set in the entire inner chamber body,
For guiding the flowing of heat tracing medium.
Alternatively, the heat tracing component of the inner chamber body includes heating device.
Further, inner chamber body and outside are provided with a spiracle；
The heating device is set in the inner chamber body, as previously mentioned, can be electric heater, steam heater, or
Person's hotline heater；The spiracle is opened on the valve plate wall to be connected to the inner chamber body and the flue or pipe
Road.
Valve described here can be the gate valve perhaps valve of butterfly valve or double leval jib butterfly valve or other patterns.
Further, when the valve is gate valve, to solve condensation trouble, the valve is also provided with outer chamber
Heat tracing component carries out heat tracing to the outer chamber, heat tracing temperature not less than corresponding flue or medium temperature in pipeline or
Greater than the flue or pipeline internal medium dew-point temperature；
The outer chamber be under valve opening state to accommodate valve plate be connected with valve body support executing agency it is close
Seal frame.
Specifically, the heat tracing component of the outer chamber includes:
The diversion pipeline being connected with the flue or pipeline, and/or the heat tracing pipeline being connected with extraneous heat tracing medium；
The two-port of the diversion pipeline is respectively communicated in the upstream and downstream of the flow direction of flue or pipeline high-temperature medium；
The a port of the heat tracing pipeline connects extraneous heat tracing medium source, and another port can connect the valve plate inner cavity
The import of body or other positions for flowing to valve；
Intermediate at least part coiling of the diversion pipeline and heat tracing pipeline is in the outer wall of the outer chamber.
Specifically, the port that the diversion pipeline is connected to the upstream of flue or pipeline high-temperature medium flow direction is set as loudspeaker
Nozzle, the upstream that the big mouth of the loudspeaker nozzle is flowed to towards flue or pipeline high-temperature medium.
Compared with prior art, the present invention has the following technical effect that:
Since valve plate has hollow inner chamber body, by being passed through heat tracing medium into the inner chamber body or in the inner chamber body
It inside directly heats, to guarantee not condense on valve plate, so that is generated after efficiently avoiding moisture condensation and moisture condensation includes burn into knot
Dirt, agglomeration, etc. influence a series of problems and the generation of harm of valve seal and switch, namely solve this field all the time
Global problem in this industry such as unavoidable valve moisture condensation, fouling, agglomeration.Valve and live cigarette are extended as a result,
The service life in road or pipeline；The reliability for improving valve ensure that the safety of production；Moreover, production of the present invention
Product and the energy consumption of its heat tracing of correlation method are low compared to similar technique, have significantly energy-saving, environmentally protective meaning.
Detailed description of the invention
Fig. 1 a is the schematic diagram of the corresponding anti-condensation structure of gate valve of the embodiment of the present invention 1；
Fig. 1 b is the H-H cross-sectional view of Fig. 1；
Fig. 2 is the schematic diagram of the corresponding anti-condensation structure of gate valve of the embodiment of the present invention 2；
Fig. 3 is the schematic diagram of the corresponding anti-condensation structure of gate valve of the embodiment of the present invention 3；
Fig. 4 is the schematic diagram of the corresponding anti-condensation structure of double leval jib butterfly valve of the embodiment of the present invention 4；
Fig. 5 is the schematic diagram of the corresponding anti-condensation structure of double leval jib butterfly valve of the embodiment of the present invention 5；
Fig. 6 is the schematic diagram of the corresponding anti-condensation structure of butterfly valve of the embodiment of the present invention 6；
Fig. 7 is the schematic diagram of the corresponding anti-condensation structure of butterfly valve of the embodiment of the present invention 7；
In figure, 1. Direct Travel executing agency, 2. frame, 3. valve rod, 4. valve plate, 5. valve seat, 6. valve body, 7. baffle plate 8.
The outer chamber of 9. heater of insulating layer, 10. four-bar mechanism, 11. jiaos of stroke actuators, 12. valve rod 13. receiving plate
14. the pipeline A. medium entrance B. media outlet C. spiracle D. of 15. oviduct 16. of diversion pipeline conveying heat tracing medium
The big mouth E. diversion pipeline outlet of oviduct
Specific embodiment
With reference to the accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that described herein
Specific examples are only used to explain the present invention, is not intended to limit the present invention.
Embodiment 1
A kind of gate valve is held including valve body 6, valve plate 4, valve seat 5, valve rod 3, the support being connected with valve body 6 as shown in Figure 1a
The frame 2 of row mechanism 1, Direct Travel executing agency 1；Wherein, valve plate 4 has hollow inner chamber body, and inner cavity body wall is equipped with heat tracing
The import A and outlet B of medium.
Under valve-closed state, the heat tracing medium can be the external such as heat seal wind from air blower, heat tracing
The temperature of medium is close with the medium temperature in flue or pipeline or is greater than flue or pipeline internal medium dew-point temperature.The heat tracing
Medium enters the inner chamber body of the valve plate 4 from the import A, makes the inner chamber body thermally equivalent, due to the heat tracing medium
Temperature is not less than the flue or pipeline internal medium dew-point temperature, to prevent valve from condensing.
Further, in the inner chamber body of the valve plate 4, baffle plate 7 can be also installed, as illustrated in figs. 1A and ib, thus
Realize the uniform abundant heat tracing of entire valve plate 4.
Or simultaneously, guarantor is covered on the inner chamber body inner wall that flue or pipeline internal medium flow to downstream in the valve plate 4
Warm layer 8, as shown in Figure 1 b, so as to effectively reduce heat tracing energy consumption.
Embodiment 2
A kind of gate valve, as shown in Fig. 2, being held including valve body 6, valve plate 4, valve seat 5, valve rod 3, the support being connected with valve body 6
The frame of row mechanism 1, Direct Travel executing agency 1, wherein valve plate 4 has hollow inner chamber body, and heater 9 is arranged in inner chamber body.
Start the heater 9, the intracorporal medium in valve plate inner cavity is heated to and the medium temperature phase in flue or pipeline
Dew-point temperature close or greater than flue or pipeline internal medium, to prevent valve from condensing.
After being heated due to the intracorporal medium in 4 inner cavity of valve plate, gas expansion can be generated, it is described in order to avoid building the pressure
It is corresponded on valve plate 4 and offers a spiracle C on the body wall of inner cavity, the spiracle C is connected with the flue or pipeline.
The heater 9 can be in electric heater or steam heater or hotline heater or valve plate to exist simultaneously
Electric heater or conduction oil are packed into inner chamber body.
Embodiment 3
For such as embodiment 1 and gate valve as described in example 2, the frame 2 for the support executing agency 1 being connected with valve body 6
It is the outer chamber 13 of the sealing of a receiving valve plate 4, for preventing the leakage of valve plate 4 Yu 6 sealing position of valve body, as shown in Figure 3.
This outer chamber 13 is a dead zone, in order to avoid its internal condensation, with the following method: diversion pipe is arranged in flue or pipeline
Road 14 and the oviduct 15 being attached thereto, the big mouth D of oviduct 15 just towards medium flow to upstream, the osculum of oviduct 15 with
Diversion pipeline 14 connects, and the diversion pipeline 14 stretches out flue or pipeline and wound after several circles outside the outer chamber of sealing 13 again
It backs into flue or pipeline, the diversion pipeline 14 is led back to another mouthful of E in flue or pipeline just towards medium flow field
To downstream.In this way, on the basis of making full use of the high-temperature medium heat in pipeline, it is not necessarily to additional energy
Realization prevents valve from condensing.
Alternatively, (such as can be air blower conveying using conveying heat tracing medium in the aforementioned inner chamber body hollow to valve plate 4 simultaneously
Heated generation heat seal wind) pipeline 16, i.e., by pipeline 16 be wrapped in advance it is described accommodate valve plate outer chamber 13 outside
The heat tracing medium entrance A of the inner chamber body of valve plate 4 is connected to after several circles.
Its principle is: when carrying out heat tracing to the outer chamber 13 using high-temperature medium in flue or pipeline, when the height
When warm medium is flowed in flue or pipeline at oviduct 15, since the diameter of the big mouth D of oviduct 15 is greater than diversion pipeline
14 diameters, after the high-temperature medium in flue or pipeline enters the big mouth D of oviduct, flue gas flow rate can be reduced, according to Bernoulli Jacob
Equation principle, P1+1/2ρ V1 2+ρ gh1=P2+1/2ρ V2 2+ρ gh2, in formula, P represents the pressure that certain in fluid is put, P1For loudspeaker
The outer pressure of pipe, P2For loudspeaker intraductal pressure, V represents fluid in the flow velocity of the point, V1For flue gas flow rate outside oviduct, V2For loudspeaker
Inner tube smoke flow velocity, ρ are fluid density, and g is acceleration of gravity, and h represents height, h where the point in fluid1, h2For in fluid
The point height inside and outside oviduct respectively, h1=h2.Can also be expressed as P move+P it is quiet=C, i.e. contour flowing when, fluid dynamic energy and
The pressure P that potential energy is respectively formed dynamic and P quiet total amount is definite value C, i.e. flow velocity is higher, and kinetic energy is bigger, and potential energy is smaller, and pressure is got over
Small, vice versa.So the flue gas pressures at 15 big mouthfuls of D of oviduct can be greater than the flue gas pressures in flue or pipeline；In pressure
Under difference effect, flue gas can be entered the diversion pipeline 14 for being wrapped in outer chamber outer wall by horn mouth D；Meanwhile according to Bernoulli equation
The external agency flow velocity of principle, 14 exit E of diversion pipeline is big, then pressure is small, the interior media flow velocity of diversion pipeline exit E
Small, then pressure is big, and pressure can then be greater than the pressure in flue or pipeline, and therefore, equally under pressure difference effect, flue gas, which flows through, to be twined
The diversion pipeline for being wound on 13 outer wall of outer chamber is outflowed back in flue or pipeline by exporting E, in short, the height in flue or pipeline
Warm medium, which can enter from the horn mouth D of diversion pipeline after diversion pipeline 14, is back to flue or pipeline by diversion pipeline outlet E again.By
It is wrapped in 13 outer wall of outer chamber in diversion pipeline 14, the heat tracing effect for the outer chamber 13 can be realized, to keep away
Valve moisture condensation is exempted from.
Likewise, first accommodating the close of plate to the pipeline 16 of conveying heat tracing medium in valve plate inner chamber body (such as heat seal wind)
The heat tracing medium entrance A reconnected after several circles into valve plate inner chamber body is wound outside the outer chamber of envelope, the heat tracing medium is (as heat is close
Envelope wind) heat tracing effect for the outer chamber of the sealing for accommodating plate can be realized when flowing through the pipeline 16, thus
The problem of avoiding valve moisture condensation.
Embodiment 4
A kind of double leval jib butterfly valve, as shown in figure 4, being held including valve body 6, valve plate 4, valve seat 5, four-bar mechanism 10, angle stroke
Row mechanism 11, wherein the valve plate 4 has hollow inner chamber body, has import A and outlet B, and the import A has break-through valve
Body 6 is connected to the channel of the inner chamber body of the valve plate with valve seat 5, and the outlet B is opened in the axial section of valve plate 4, described in connection
The inner chamber body and flue or pipeline of valve plate.
It is similar with embodiment 1, inside the inner chamber body of the valve plate 4, baffle plate 7 can be also installed, to realize entire
The uniform abundant heat tracing of valve plate 4.
Or simultaneously, it flows in the valve plate 4 close to flue or pipeline internal medium and is covered on the inner wall of the inner chamber body in downstream
Insulating layer 8, to effectively reduce heat tracing energy consumption.
Embodiment 5
A kind of double leval jib butterfly valve, as shown in figure 5, being held including valve body 6, valve plate 4, valve seat 5, four-bar mechanism 10, angle stroke
Row mechanism 11, wherein valve plate 4 has hollow inner chamber body, and heater 9 is installed inside the inner chamber body and correspondingly opens up breathing
Hole C.Start the heater 9, the medium inside the inner chamber body of the valve plate 4 is heated to and the medium temperature in flue or pipeline
Spend it is close or greater than the dew-point temperature of flue or pipeline internal medium come achieve the purpose that prevent moisture condensation.Gas inside the inner chamber body
Body medium expands after being heated, and the spiracle C opened up on the cavity plays the purpose for preventing from building the pressure.
For the energy consumption for being effectively reduced heat tracing, the inner cavity in downstream is flowed to close to flue or pipeline internal medium in the valve plate 4
Covering and heat insulating layer 8 on internal wall.
Embodiment 6
A kind of butterfly valve, as shown in fig. 6, including valve body 6, valve plate 4, valve seat 5, valve rod 12, angle stroke actuators 11,
In, valve plate 4 has hollow inner chamber body, and offers the import A of heat tracing medium and export B, and the import A is connected to valve rod 12
On one end axial direction without executing agency axis hole to access the heat seal wind from air blower, temperature is not less than flue or pipe
Medium temperature in road is close or is greater than flue or pipeline internal medium dew-point temperature, and the axial direction that the outlet B is opened in valve plate 4 is disconnected
Face.
As described above by the import A to being passed through and the medium temperature in flue or pipeline inside the inner chamber body of valve plate 4
It is close or prevent from condensing greater than flue or the heat tracing medium of pipeline internal medium dew-point temperature.
It is similar with embodiment 1, inside the inner chamber body of the valve plate 4, baffle plate 7 can be also installed, to realize entire
The uniform abundant heat tracing of valve plate 4.
Or simultaneously, guarantor is covered on the inner chamber body inner wall that flue or pipeline internal medium flow to downstream in the valve plate 4
Warm layer 8, to effectively reduce heat tracing energy consumption.
Embodiment 7
A kind of butterfly valve, as shown in fig. 7, comprises valve body 6, valve plate 4, valve seat 5, valve rod 12, angle stroke actuators 11,
In, valve plate 4 has hollow inner chamber body, and opens up import A and outlet B respectively.The import A and outlet B are located at and institute
The two sides in the perpendicular direction of valve rod 12 are stated, import A runs through valve seat 5 and valve body 6, makees to access the heat seal wind from air blower
Temperature for heat tracing medium, the heat tracing medium is close not less than the medium temperature in flue or pipeline or is greater than flue or pipe
Medium dew-point temperature in road.
Be passed through when valve is closed, inside the inner chamber body of Xiang Suoshu valve plate 4 it is close with the medium temperature in flue or pipeline or
It prevents from condensing greater than flue or the heat tracing medium of pipeline internal medium dew-point temperature.
The valve of other structures, can also be referring to the above-mentioned structure for avoiding moisture condensation.This is no longer repeated one by one.
It is similar to Example 1, for the abundant heat tracing of entire valve plate 4, inside the inner chamber body of the valve plate 4, folding can be installed
Flowing plate 7.
Further, in order to reduce the energy consumption of heat tracing, the valve plate 4 flows in downstream close to flue or pipeline internal medium
It, can covering and heat insulating layer 8 on cavity inner wall.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (17)
1. a kind of method for preventing valve from condensing, it is characterised in that:
The valve plate of the valve has hollow cavity body, and carries out heat tracing to the valve plate inner chamber body, and heat tracing temperature is not less than phase
The medium temperature in flue or pipeline answered is greater than the flue or pipeline internal medium dew-point temperature.
2. the method for preventing valve from condensing as described in claim 1, it is characterised in that:
The import and outlet of external heat tracing medium are respectively provided on the valve plate, external heat tracing medium accesses institute from the import
Valve plate inner chamber body is stated, leads to the flue or pipeline from the outlet.
3. the method for preventing valve from condensing as claimed in claim 2, it is characterised in that:
The external heat tracing medium is quoted from extraneous heat seal wind.
4. the method for preventing valve from condensing as described in claim 1, it is characterised in that:
Heating device by being installed on the valve plate inner chamber body heats the inner chamber body.
5. the method for preventing valve from condensing as described in claim 1, it is characterised in that:
The valve is gate valve perhaps butterfly valve or double leval jib butterfly valve.
6. the method for preventing valve from condensing as described in claim 2-4 is any, it is characterised in that:
The valve is gate valve；
It further include that heat tracing is carried out for the outer chamber to accommodate valve plate, heat tracing temperature is not less than in corresponding flue or pipeline
Medium temperature or be greater than the flue or pipeline internal medium dew-point temperature.
7. the method for preventing valve from condensing as claimed in claim 6, it is characterised in that:
To the high-temperature medium that the heat tracing medium to the outer chamber heat tracing includes in flue or pipeline, flow through described in being arranged in
The intracorporal diversion component of exocoel realizes heat tracing, and two ports of the diversion component are respectively communicated in flue；And/or including quoted from
Extraneous heat tracing medium flows through and is arranged in the intracorporal heat tracing component realization heat tracing of the exocoel, the heat tracing component one end
Mouth is connected to extraneous heat tracing medium source.
8. the method for preventing valve from condensing as claimed in claim 7, it is characterised in that:
Tubular structure coiling is respectively adopted in described outer in the intracorporal diversion component of the exocoel and/or the intracorporal heat tracing component of exocoel
The outer wall of cavity.
9. a kind of valve, including valve body and valve plate, it is characterised in that:
The valve plate has hollow inner chamber body；
The inner chamber body has heat tracing component, carries out heat tracing to the inner chamber body, heat tracing temperature not less than corresponding flue or
Medium temperature in pipeline is greater than the flue or pipeline internal medium dew-point temperature.
10. valve as claimed in claim 9, it is characterised in that:
Further include insulating layer, is set on the inner chamber body inner wall and flows to the one of downstream close to the flue or pipeline internal medium
Side.
11. valve as claimed in claim 9, it is characterised in that:
The heat tracing component of the inner chamber body includes the import of the pipeline and the heat tracing medium that are connected to extraneous heat tracing medium and goes out
Mouthful, the import and outlet are opened in the inner chamber body, are respectively used to access the extraneous heat tracing medium and by the heat tracing
Medium is led in corresponding flue or pipeline.
12. valve as claimed in claim 11, it is characterised in that the heat tracing component of the inner chamber body further include:
Baffle plate is set in the entire inner chamber body, for guiding the flowing of heat tracing medium.
13. valve as claimed in claim 9, it is characterised in that:
The heat tracing component of the inner chamber body includes heating device；
The heating device is set in the inner chamber body.
14. the valve as described in claim 9-13 is any, it is characterised in that:
The valve is gate valve perhaps butterfly valve or double leval jib butterfly valve.
15. the valve as described in claim 9-13 is any, it is characterised in that:
The valve is gate valve；
The valve further includes the heat tracing component of outer chamber, carries out heat tracing to the outer chamber, heat tracing temperature is not less than corresponding
Flue or pipeline in medium temperature or be greater than the flue or pipeline internal medium dew-point temperature；
The outer chamber is the sealing frame under valve opening state to accommodate the support executing agency of valve plate being connected with valve body
Frame.
16. valve as claimed in claim 15, it is characterised in that:
The heat tracing component of the outer chamber includes:
The diversion pipeline being connected with the flue or pipeline, and/or the heat tracing pipeline being connected with extraneous heat tracing medium；
The two-port of the diversion pipeline is respectively communicated in the upstream and downstream of the flow direction of flue or pipeline high-temperature medium；
The a port of the heat tracing pipeline connects extraneous heat tracing medium source；
Intermediate at least part coiling of the diversion pipeline and heat tracing pipeline is in the outer wall of the outer chamber.
17. valve as claimed in claim 16, it is characterised in that:
The port that the diversion pipeline is connected to the upstream of flue or pipeline high-temperature medium flow direction is set as loudspeaker nozzle, the loudspeaker
The upstream that the big mouth of nozzle is flowed to towards flue or pipeline high-temperature medium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910634122.9A CN110345308A (en) | 2019-07-09 | 2019-07-09 | A kind of valve and its method for preventing moisture condensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910634122.9A CN110345308A (en) | 2019-07-09 | 2019-07-09 | A kind of valve and its method for preventing moisture condensation |
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| CN110345308A true CN110345308A (en) | 2019-10-18 |
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| CN201910634122.9A Pending CN110345308A (en) | 2019-07-09 | 2019-07-09 | A kind of valve and its method for preventing moisture condensation |
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