CN2399695Y - Immediately heating boosting heat exchanger - Google Patents
Immediately heating boosting heat exchanger Download PDFInfo
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- CN2399695Y CN2399695Y CN 99256549 CN99256549U CN2399695Y CN 2399695 Y CN2399695 Y CN 2399695Y CN 99256549 CN99256549 CN 99256549 CN 99256549 U CN99256549 U CN 99256549U CN 2399695 Y CN2399695 Y CN 2399695Y
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Abstract
The utility model belongs to the technology of a vapor-water heat exchanger, which comprises a vapor inlet, a front nozzle, a back nozzle, a cold water inlet nozzle and a vapor-water mixture outlet, wherein, the front parts of flow paths of the front and back nozzles are reducing diameters and the back parts are diameter gradually enlarging structures. The throat cross section of the flow path of the front nozzle of the utility model is designed into the same area as a critical cross section and the mach number M is 1. The throat cross section of the flow path of the back nozzle is larger than the area of the critical cross section. The pressure of hot water outputted by the device of the utility model is greater than the pressure of the inlet vapor and the cold water. No additional energy resource is required. When the inlet vapor and the water pressure are not changed, the flow capacity of the hot water outputted by the device is constant.
Description
The utility model belongs to vapour---and the water heat exchanger technology mainly proposes a kind of Instant heating type supercharging heat-exchanging device.
Existing vapour---the hydrothermal exchange device is divided into vapour---moisture streaming (indirectly) heat exchanger (calling conventional heat exchanger in the following text) and vapour---the direct direct contact heat exchanger of water.The main pattern of conventional heat exchanger has heat-exchangers of the plate type and tubing heat exchanger, the main feature of this class heat exchanger is that steam and water carry out heat exchange by wooden partition or tube wall, thus its complex structure, heat exchanger effectiveness low (being generally 80%～90%), bulky, the maintenance cost height.The direct direct contact heat exchanger of carbonated drink can make full use of the latent heat of steam, so the thermal efficiency increases substantially (generally more than 95%).For example the patent No. 88212607.5, the low noise steam-water injection; Application number 92244057, vapour-liquid blender fast; Application number 94229033, two jet flow vapour---water direct heat exchanger; Application number 95216835, efficient jet flow gas---water direct heat exchanger; Application number 96222677, the carbonated drink direct heat exchanger; Application number 97213204 high efficiency heaters etc.
The existing common weak point of heat exchanger of above-mentioned two classes is: also not too abundant by quality, momentum, exchange heat between its vapour-water of heat-exchange device, pressure of main is its output hot water can not be higher than the steam of import and the pressure of water all the time, so essential outer heating pump pressurizes and could realize delivery or assurance systemic circulation in general heat supply, heating engineering.
The purpose that the utility model proposes Instant heating type supercharging heat-exchanging device promptly is to overcome the existing in prior technology deficiency, makes it have the advantages that self supercharging and heat outputting discharge are not subjected to the system pressure variable effect.
The utility model is finished the technical scheme that its invention task takes: according to the new branch of science that grew up in recent years---and " two-phase fluid dynamics " and principles such as " thermal conduction study ", vapour---the runner of the direct direct contact heat exchanger of water re-constructs and designs to existing.The utility model heat exchanger comprises steam inlet, preceding nozzle, and cold water enters nozzle, rear nozzle; Preceding nozzle runner is rear end hole enlargement of front end undergauge or isometrical structure, and its throat section equals the critical cross-section area, i.e. Mach number M=1; Equal local velocity of sound in this steam velocity, through the gradually extension diameter section of runner rear end, steam pressure further reduces, and flow velocity further enlarges, and the steam of nozzle runner ejection is far sonic flow before this moment; The front end of rear nozzle runner is that convergent footpath, rear end are the structure in flaring footpath, and its throat section makes throat and divergent segment all form far sonic flow greater than the critical cross-section area.Sectional area changes the size of decision Mach number M.Under certain condition, when the divergent segment of rear nozzle runner forms the disperse shock wave, mixture is flowed through behind the shock wave, and pressure produces and increases jump (density jump), force value and M behind the ripple
2Be directly proportional, when back pressure (SR) fluctuateed, shock-wave spot moved forward and backward in divergent segment, guaranteed stable operation.The flow passage structure of the utility model design can assurance device output heat hydraulic pressure's steam pressure and cold water pressure of being much higher than import be supercharging.
The mixture initial stage of flowing through mixes, and the particularly fierce mixing (exchange) through the shock region makes vapour---and each parameter exchange of water is more abundant, forms the directly heated efficient heat exchange.
The effect that the utility model had:
The utility model effect main feature is:
(1) pressure of this device output hot water is far longer than the pressure of import steam and cold water, does not promptly need to add any energy, but by basis " device " self supercharging, this " device " quite self has a conveying " pump ".
Experimental rig measured data of the present utility model:
Import steam pressure: 0.36MPa
Import cold water pressure: 0.04MPA
Heat outputting water pressure: 0.68MPa (temperature difference of hot water and cold water is 41 ℃)
Above-mentioned measured data shows that this performance indications of the utility model are that the carbonated drink heat-exchange device of existing other form all can not reach.
(2) steam the pressure of G﹠W when constant when import, the hot water flow of the utility model output is constant, can not fluctuate because of the variation of SR (pressure).
Experimental rig measured data for example of the present utility model:
When system pressure changes at 0.05-0.65MPa, the error delta Q/Q=0.012 of its output flow, this can think that the flow Q of output is constant within measuring instrument error amount scope.The Q-P characteristic is " firmly " so, be any existing pump inaccessiable.
(3) pressure to import steaming G﹠W requires low.
The utility model experimental rig measured data:
At import steam pressure 0.01MPa, during import cold water pressure 0.01MPa, not only normally heat exchange but also hot water output pressure reach 0.16Mpa.
Still can stablize heat exchange and pressure operation when (4) import steam and import cold water pressure fluctuation range are very big.
From 0.01＜Pa～0.36MPA, cold water pressure is from normally stable operation of 0MPa～0.16MPa at steam pressure for example the utility model experimental provision.
(5) rate of heat exchange soon and more abundant
The stable pressurized hot water of output temperature when steam and cold water pass through this device (experimental rig latus rectum DN20, axial dimension are 310 millimeters).So be " instant heating " formula heat exchanger, rate of heat exchange is higher, reaches more than 99%.
(6) volume is little, noise is low (below 60 decibels);
(7) non flouling behaviour is simultaneously because no relative motion part so there are not wearing and tearing, need not keep in repair.
Embodiment:
Accompanying drawing 1 is the utility model structural representation.
The embodiment that provides with reference to accompanying drawing is further specified its structure:
Structure as shown in Figure 1, it includes vapour inlet, preceding nozzle 7, cold water nozzle 2, rear nozzle 5,9 is the left end flange, 4 is the right-hand member flange, the front portion of preceding nozzle runner 1 is the convergent gauge structure, the rear portion is the flaring gauge structure, its throat section equals the critical cross-section area, i.e. Mach number M=1, and speed equals local velocity of sound, cold water enters negative pressure cavity through nozzle 2, vapour---water carries out quality, momentum and exchange heat at negative pressure cavity, because pressure is negative pressure, the two-phase speed difference is big, so the disperse degree height of vapour---water, the exchange of its each parameter is more abundant.The front portion of rear nozzle runner 3 is the convergent gauge structure, and the rear portion is the flaring gauge structure, and its throat section makes throat and divergent segment all form far sonic flow greater than the critical cross-section area.6 is heat exchanger shell among the figure, and 8 is flange.
Claims (1)
1, a kind of Instant heating type supercharging heat-exchanging device comprises that steam-gas inlet, preceding nozzle (7), cold water enter nozzle (2), rear nozzle (5) and vapour---the aqueous mixtures outlet; Preceding nozzle runner (1) is flaring footpath, rear portion, anterior convergent footpath or isometrical structure, and rear nozzle runner (3) is the structure in flaring footpath, rear portion, anterior convergent footpath; The throat section of nozzle runner (1) equals the critical cross-section area before it is characterized in that, the throat section of rear nozzle runner (3) is greater than the critical cross-section area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99256549 CN2399695Y (en) | 1999-12-11 | 1999-12-11 | Immediately heating boosting heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99256549 CN2399695Y (en) | 1999-12-11 | 1999-12-11 | Immediately heating boosting heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2399695Y true CN2399695Y (en) | 2000-10-04 |
Family
ID=34039648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99256549 Expired - Fee Related CN2399695Y (en) | 1999-12-11 | 1999-12-11 | Immediately heating boosting heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2399695Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022048095A1 (en) * | 2020-09-04 | 2022-03-10 | 李华玉 | Method of reducing and using heat transfer temperature difference in heat release process |
-
1999
- 1999-12-11 CN CN 99256549 patent/CN2399695Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022048095A1 (en) * | 2020-09-04 | 2022-03-10 | 李华玉 | Method of reducing and using heat transfer temperature difference in heat release process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |