CN1072344C - Collecting box preflowing appts. of controlling parallel pipes flow and distribution according to needed amount - Google Patents
Collecting box preflowing appts. of controlling parallel pipes flow and distribution according to needed amount Download PDFInfo
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- CN1072344C CN1072344C CN 97106482 CN97106482A CN1072344C CN 1072344 C CN1072344 C CN 1072344C CN 97106482 CN97106482 CN 97106482 CN 97106482 A CN97106482 A CN 97106482A CN 1072344 C CN1072344 C CN 1072344C
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Abstract
本发明提供一种控制并联管组流量按需分配的集箱预流器，它装设于集箱内，其垂直于集箱轴线的截面积大小沿集箱轴向之变化，根据沿集箱轴向各支管流量按需分配的要求确定。本发明可进一步广泛用于公用事业、石油化工以及核发电领域，并为其安全可靠运行提供了先决条件，具有十分可观的经济价值。
The invention provides a header pre-flow device for controlling the flow distribution of parallel pipe groups on demand. It is installed in the header. The flow rate of each branch pipe in the axial direction is determined according to the requirements of distribution. The invention can be further widely used in the fields of public utility, petrochemical industry and nuclear power generation, provides prerequisites for its safe and reliable operation, and has very considerable economic value.
Description
What the present invention relates to is a kind of pre-stream device, and especially a kind of control parallel transistor group flow demand assigned manifold preflowing device belongs to the field of boilers in the mechanical engineering.
The critical piece that fluid distributed and compiles when the collection case was boiler operatiopn, because collection case assignment of traffic inhomogeneous (being that flow does not wait in each arm in parallel) maybe can not satisfy the demand assigned phenomenon and perplex the professional for a long time, and directly has influence on security, reliability, the economy of equipment operation.The professional is at various types of problems in the practice, and normal the employing increases allocation set case interior diameter, especially compiles the interior diameter that collects case; Adopt the connected system that multiple spot is introduced, multiple spot is drawn the collection case; Technology such as throttling pipeloop are adorned in employing in flow parallel transistor group bigger than normal; And employing state-of-the-art technology: promptly collect the interior flow distribution of case and compile uniform deflector structure and design control along collecting case length invariance principle based on static pressure in each parallel transistor two ends collection case of control.These technology and design for solve have significant effect at the problem of type.Show according to current research, collection case these problems in boiler operatiopn can reduce: enthalpy increase that deviation is that structure is inhomogeneous, the fume side heat load distribution is inhomogeneous and the pipe group in the concentrated expression of the inhomogeneous influence of assignment of traffic, especially the inhomogeneous and flow deviation of thermic load often exists simultaneously, and sheerly the enthalpy that causes of the flow deviation problem that increases deviation is seldom seen in the heating surface practical work process.It is inhomogeneous that the distribution according to need that solves flow in the parallel transistor can avoid effectively that parallel transistor group enthalpy increases, and then can avoid causing the overtemperature tube burst accident, so how to solve flow distribution according to need is of the prior art one big deficiency and defective in the parallel transistor.According to retrieval and the analysis and research to this field document, also still not having in the world at present has the people that flow distribution according to need in the solution parallel transistor was proposed technical scheme.
The objective of the invention is to overcome deficiency of the prior art and defective, proposed the technical scheme of a control parallel transistor group flow demand assigned manifold preflowing device, improved capable security, reliability and the economy of boiler.
Technical program of the present invention lies in increasing and the structure of parallel transistor group, the thermic load of fume side and the relevant achievement in research of flow in the parallel transistor group based on the enthalpy in the parallel transistor group, proposed under the situation of parallel transistor group even structure, for guaranteeing that each parallel transistor group has identical enthalpy and increases, the arm planted agent that thermic load is high is assigned to more mass flow, and the lower arm planted agent of thermic load distributes less mass flow, as special case, be thermic load under situation uniformly, should control the uniformity of assignment of traffic.How much flow depends on differential static pressure between the respective episode case in each arm in parallel, can regulate axial flow velocity in the collection case by changing in the collection case actual internal area vertically, and then control the pressure reduction and the gateway resistance at each parallel transistor group two ends by the variation of static pressure in the control collection case, final each parallel transistor group flow of realizing is distributed according to need, and the enthalpy of eliminating between the parallel transistor group increases deviation.Regulate axial flow velocity in the collection case in order to realize changing in the circular collection of equal diameter case actual internal area vertically, the present invention has designed the pre-stream device that is installed in the collection case, pre-stream device divides in-flow to flow device in advance and outer-flowing type flows device in advance, its sectional area size edge perpendicular to collection case axis collects the axial variation of case, according to axially each arm flow demand assigned requirement is definite along the collection case.The arm that distributes big flow, this arm place flow the actual internal area at device place in advance should be corresponding bigger, and at this moment, in-flow flows the corresponding amplification of sectional area of device in advance, and outer-flowing type flows then corresponding the dwindling of sectional area of device in advance; In like manner, distribute the arm than low discharge, the actual internal area that the device place is flowed at this arm place in advance should dwindle, and at this moment, in-flow flows corresponding the dwindling of sectional area of device in advance, and outer-flowing type flows the device sectional area in advance and then should amplify; For requiring flow to be evenly distributed to arm, in-flow flows the device sectional area in advance and should reduce with axial flow Inbound linearity, and outer-flowing type flows the device sectional area in advance and should amplify with the axial flow Inbound is linear.The bearing method of pre-stream device is respectively: in-flow flows device in advance and sets firmly a shell outward, the cylindrical of shell directly with the collection case in the circle secure fit, each arm flows the device endoporus in advance to in-flow and communicates by inner flow tube and be connected; Outer-flowing type flows device in advance and can connect by setting up some backstay supportings, and backstay is fixed on the interior circle of collection case and outer-flowing type flows between the device cylindrical in advance.
The present invention has outstanding substantive distinguishing features and obvious improvement in field of boilers, improved the security reliability of equipment such as boiler, generating set operation, solved the long-term unsolved technical barrier of professional, security reliability of the present invention, provide prerequisite for further being widely used in public utilities, petrochemical industry and nuclear power generation field, had very considerable economic value.
Provide detailed description and embodiment below with reference to accompanying drawing to enforcement of the present invention:
Fig. 1 in-flow scaling type flows the device structural representation in advance
Fig. 2 in-flow scaling type flows the device cross-sectional schematic in advance
Fig. 3 outer-flowing type scaling type flows the device structural representation in advance
Fig. 4 outer-flowing type scaling type flows the device cross-sectional schematic in advance
Fig. 5 in-flow scaling type flows the device structural representation in advance
Fig. 6 in-flow scaling type flows the device cross-sectional schematic in advance
Fig. 7 outer-flowing type scaling type flows the device structural representation in advance
Fig. 8 outer-flowing type scaling type flows the device cross-sectional schematic in advance
Fig. 9 in-flow gradual shrinkage flows the device structural representation in advance
Figure 10 in-flow gradual shrinkage flows the device cross-sectional schematic in advance
Figure 11 outer-flowing type flaring type flows the device structural representation in advance
Figure 12 outer-flowing type flaring type flows the device cross-sectional schematic in advance
Shown in Fig. 1-12, the present invention describes in detail by three groups of embodiment: can regulate axial flow velocity along axial flow by sectional area by changing in the collection case, and then control the pressure reduction at each parallel transistor group two ends and the resistance of coming in and going out by the variation of static pressure in the control collection case 5, final each parallel transistor group flow of realizing is distributed according to need, and the enthalpy of eliminating the parallel transistor group increases deviation.The present invention has designed the pre-stream device that is installed in the collection case 5, the branch in-flow flows device 1 in advance and outer-flowing type flows 2 liang of classes of device in advance, the sectional area that in-flow flows device 1 in advance is the sectional area of same place flow circulation, the sectional area that outer-flowing type flows device 2 in advance is the area difference that same place collection case 5 sectional areas deduct the sectional area of flow circulation, its sectional area size edge perpendicular to collection case axis collects the axial variation of case, according to axially each arm flow demand assigned requirement is definite along the collection case.Distribute the arm 6 of big flow, the flow actual internal area at these arm 6 places should be corresponding bigger, and on this basis, determines that further in-flow flows the sectional area that device 1 or outer-flowing type flow device 2 in advance in advance.The support pattern of pre-stream device is: circle secure fit in the pre-device 1 outer shell 4 that sets firmly of in-flow, the cylindrical of shell 4 and collection case 5, each arm 6 flow device 1 endoporus in advance to in-flow and communicate by inner flow tube 7 and be connected; Outer-flowing type flows device 2 in advance and can connect by setting up 3 supportings of some backstays, and backstay 3 is fixed on collection case 5 interior circles and outer-flowing type flows between the device 2 in advance.
Embodiment one: require the interior two ends of collection case parallel transistor group flow big, the little assignment of traffic of collection case middle part flow
As shown in Figure 1 and Figure 2, the version that realizes this assignment of traffic of embodiment one is in-flow scaling type when flowing device in advance, and its flow actual internal area perpendicular to axial direction is big earlier, progressively dwindles, and is less during near collection case middle part, progressively amplifies after crossing the middle part again; As shown in Figure 3, Figure 4, for the outer-flowing type scaling type flows device in advance, its flow actual internal area perpendicular to axial direction also is big earlier, progressively dwindle, less during approaching collection case middle part, cross progressively amplification again behind the middle part, sectional area itself is earlier little vertically and outer-flowing type scaling type flows device in advance, progressively amplify, bigger during near collection case middle part, progressively dwindle again after crossing the middle part.
Embodiment two: require in the collection case two ends parallel transistor group flow little, the collection case middle part flow big assignment of traffic of trying one's best
As Fig. 5, shown in Figure 6, the version that realizes embodiment two this assignment of traffic is that in-flow scaling type flows device in advance, and its flow actual internal area perpendicular to axial direction is earlier little, progressively enlarges (except the entrance guiding section), near collection case when middle part maximum, progressively dwindle again after crossing the middle part; As Fig. 7, shown in Figure 8, for the outer-flowing type scaling type flows device in advance, its flow actual internal area perpendicular to axial direction also is earlier little, progressively enlarges (except the entrance guiding section) maximum during near collection case middle part, progressively dwindle again after crossing the middle part, and the outer-flowing type scaling type flow in advance device vertically sectional area itself greatly progressively dwindle earlier, (except the entrance guiding section), minimum during near the middle part (can be zero in theory, can make on the structure tries one's best for a short time), cross progressively amplification again behind the middle part.
Embodiment three: require on the collection case parallel transistor group vertically flow reduce gradually or protect even constant assignment of traffic
Shown in Fig. 9,10, realize that the version of embodiment three this assignment of traffic is that the in-flow gradual shrinkage flows device in advance, its flow actual internal area perpendicular to axial direction is for dwindling gradually; Flow device in advance as Figure 11, Figure 12 outer-flowing type flaring type of doing, its flow actual internal area perpendicular to axial direction also is to dwindle gradually, and the outer-flowing type flaring flow in advance device vertically sectional area itself be to enlarge gradually.
Claims (2)
1, a kind of control parallel transistor group flow demand assigned manifold preflowing device, this control parallel transistor group flow demand assigned manifold preflowing device that it is characterized in that described number of the edition is installed in the collection case (5), its sectional area size edge perpendicular to collection case axis collects the axial variation of case, according to axially each arm flow demand assigned requirement is definite along the collection case.
2, this control parallel transistor group flow demand assigned manifold preflowing device according to claim 1, its feature is that also support pattern is: in-flow flows the outer shell (4) that sets firmly of device (1) in advance, the cylindrical of shell (4) directly with collection case (5) in the circle secure fit, each arm flows device (1) endoporus in advance to in-flow and communicates by inner flow tube (7) and be connected; Outer-flowing type flows device in advance and can connect by setting up some backstays (3) supporting, and backstay (3) is fixed on the interior circle of collection case (5) and outer-flowing type flows between device (2) cylindrical in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97106482 CN1072344C (en) | 1997-06-23 | 1997-06-23 | Collecting box preflowing appts. of controlling parallel pipes flow and distribution according to needed amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97106482 CN1072344C (en) | 1997-06-23 | 1997-06-23 | Collecting box preflowing appts. of controlling parallel pipes flow and distribution according to needed amount |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1173608A CN1173608A (en) | 1998-02-18 |
| CN1072344C true CN1072344C (en) | 2001-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97106482 Expired - Fee Related CN1072344C (en) | 1997-06-23 | 1997-06-23 | Collecting box preflowing appts. of controlling parallel pipes flow and distribution according to needed amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072344C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644764B (en) * | 2018-05-10 | 2019-10-15 | 哈尔滨锅炉厂有限责任公司 | Header device with static pressure self-balancing for CFB boiler |
| CN110274627B (en) * | 2019-06-25 | 2020-06-19 | 西安交通大学 | Measuring method for high-temperature and high-pressure working medium flow distribution in parallel tube bundle |
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1997
- 1997-06-23 CN CN 97106482 patent/CN1072344C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1173608A (en) | 1998-02-18 |
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Granted publication date: 20011003 |