CN202884889U - Low-humidity steam two-effect heat exchanging device - Google Patents
Low-humidity steam two-effect heat exchanging device Download PDFInfo
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- CN202884889U CN202884889U CN 201220530562 CN201220530562U CN202884889U CN 202884889 U CN202884889 U CN 202884889U CN 201220530562 CN201220530562 CN 201220530562 CN 201220530562 U CN201220530562 U CN 201220530562U CN 202884889 U CN202884889 U CN 202884889U
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Abstract
The utility model relates to a low-humidity steam two-effect heat exchanging device. A current divider is arranged in a liquid phase space of a water bath type saturated steam generator. A steam drying heat exchanger is installed on a steam discharge pipeline of the water bath type saturated steam generator. Superheated steam enters the current divider through a pressure control valve, wet saturated steam out from a saturated steam generator is heated to dry saturated steam by the super heated steam, the dry saturated steam enters a steam heat exchanger to heat materials and becomes condensate water, the condensate water then enters a condensate water heat exchanger and continues to release sensible heat to heat the materials, cooled condensate water enters a water collection tank and is then pumped into the saturated steam generator by a make-up pump, and a programmable logic controller (PLC) is then used for adjusting the opening degree of the pressure control valve according to temperature of a material outlet. According to the low-humidity steam two-effect heat exchanging device, gradient utilization of steam heat is achieved, complete utilization of the steam heat is ensured, and energy efficiency is improved.
Description
Technical field
The utility model relates to a kind of steam heat exchanger, particularly a kind of low humidity steam two effect heat-exchanger rigs.
Background technology
During indirect heat exchange, the saturated vapor heat exchange efficiency is higher than superheated steam, and the degree of superheat is higher, and heat exchange efficiency is lower.When only having the superheated steam source, then need superheated steam is carried out desuperheat, reduce the degree of superheat.General steam temp lowering device such as atomizing attemperator, the non-contact attemperator etc. of adopting, the degree of superheat is lower behind the desuperheat, and water entrained by steam is more serious, and steam quality is poorer.If vapor (steam) temperature need to be down to required saturation temperature corresponding to steam pressure of using, then usually to use the water-bath type saturated steam generator, be called again the water-bath type steam temp lowering device.
The cylindrical shell bottom of water-bath type saturated steam generator is liquid Space, cylindrical shell top is vapor phase space, the roof of vapor phase space is provided with water-bath type saturated steam generator exhaust steam valve, be provided with current divider in the liquid Space, overheated steam pipe stretches in the water-bath type saturated steam generator and is connected with current divider, the sidewall of water-bath type saturated steam generator is equipped with water level and takes into account overflow valve, pressure probe is installed on the roof, the moisturizing delivery side of pump links to each other with the bottom of water-bath type saturated steam generator, and replenishes an amount of condensed water according to the water level control signal of water-level gauge in the water-bath type saturated steam generator.Pressure gauge and pressure-control valve are installed on the overheated steam pipe, and the saturated vapor pressure force signal that pressure probe records offers the PLC controller, the aperture of PLC controller controlled pressure control valve.Superheated steam flows out from current divider, becomes wet saturated steam through the water heat exchange cooling with liquid Space and upwards overflows, from the water-bath type saturated steam generator exhaust steam valve outflow of roof.The weak point of existing water-bath type saturated steam generator is: the moisture content in the saturated vapor is higher, and steam quality is poor.
Steam discharges latent heat after the vapor heat exchanger heat exchange, and is condensed into the condensed water under the uniform pressure, and condensed water enters condensate pipe through drain valve.The steam utilization of existing heat-exchanger rig is low, and the unit product steam consumption is high, and heat exchange efficiency and efficiency are lower.
The utility model content
The purpose of this utility model is, overcomes problems of the prior art, and a kind of low humidity steam two effect heat-exchanger rigs are provided, and can reduce the moisture content in the saturated vapor, takes full advantage of the latent heat of steam and the sensible heat of condensed water.
For solving above technical problem, a kind of low humidity steam two effect heat-exchanger rigs of the present utility model, comprise water-bath type saturated steam generator and small pump, the cylindrical shell bottom of described water-bath type saturated steam generator is liquid Space, cylindrical shell top is vapor phase space, the roof of described vapor phase space is provided with exhaust steam valve, be provided with current divider in the described liquid Space, described moisturizing delivery side of pump links to each other with the bottom of described water-bath type saturated steam generator, on the export pipeline of described water-bath type saturated steam generator exhaust steam valve the steam drying heat exchanger is installed, the superheated steam import of described steam drying heat exchanger is connected with the steam source pipe road of superheated steam, the superheated steam outlet of described steam drying heat exchanger is equipped with the pressure-control valve that is controlled by the PLC controller, the outlet of described pressure-control valve is connected with the current divider of described water-bath type saturated steam generator, the saturated vapor import of described steam drying heat exchanger is connected with the outlet of described water-bath type saturated steam generator exhaust steam valve, the saturated vapor outlet of described steam drying heat exchanger is connected with the steam inlet of vapor heat exchanger, the outlet that the condensation-water drain of vapor heat exchanger is provided with drain valve and drain valve is connected with the condensed water import of condensed water heat exchanger, the condensation-water drain of condensed water heat exchanger is connected with the import of water collect tank, and the outlet of water collect tank is connected with the entrance of described small pump; The material inlet pipe is connected with the material inlet of described condensed water heat exchanger, and the material outlet of condensed water heat exchanger is connected with the material inlet of described vapor heat exchanger, and the material outlet of vapor heat exchanger connects material outlet pipe; The first temperature sensor is installed on the described material outlet pipe, the outlet of described vapor heat exchanger drain valve is equipped with the second temperature sensor, the holding wire of described the first temperature sensor and the second temperature sensor accesses respectively the signal input part of described PLC controller, and the control signal wire of described PLC controller accesses described pressure-control valve.
With respect to prior art, the utility model has been obtained following beneficial effect: superheated steam carries out indirect to saturated vapor first in the steam drying heat exchanger, enter again the current divider of water-bath type saturated steam generator by pressure-control valve, becoming wet saturated steam from current divider steam out after lowering the temperature with the water heat exchange of liquid Space upwards overflows, this moment, the moisture content of saturated vapor was higher, after the exhaust steam valve outflow of roof, enter the steam drying heat exchanger, superheated steam carries out indirect to saturated vapor in the steam drying heat exchanger, make the aqueous water in the wet saturated steam be evaporated to steam, become dry saturated steam.Dry saturated steam enters vapor heat exchanger material is carried out again indirect, become condensed water after discharging latent heat, discharged by drain valve from the condensed water that vapor heat exchanger flows out, then enter the condensed water heat exchanger, condensed water continues to discharge sensible heat material is carried out indirect preheating in the condensed water heat exchanger, further the condensed water after the cooling enters water collect tank, is pumped in the water-bath type saturated steam generator by small pump again.The first temperature sensor is surveyed the temperature of material in the material outlet pipe and is offered the PLC controller, and the PLC controller is according to the aperture of material outlet adjustment pressure-control valve, thus the pressure of steam supply of control water-bath type saturated steam generator.The second temperature sensor is by surveying the duty that the condensed water water temperature can perception vapor heat exchanger drain valve, the PLC controller compares the temperature of the second temperature sensor detection and maximum temperature and the minimum temperature of setting: if condensate temperature is between maximum temperature and minimum temperature that the PLC controller is set behind the drain valve, then drain valve is working properly; If condensate temperature is higher than the maximum temperature that the PLC controller is set behind the drain valve, then trap leaking is installed and is reported to the police, so that alert is in time safeguarded; If condensate temperature is lower than the minimum temperature that the PLC controller is set behind the drain valve, then drain valve stops up, and device is also reported to the police, so that alert is in time fixed a breakdown, avoids impact to produce.Material at first enters the condensed water heat exchanger and condensed water carries out heat exchange, although condensed water ratio of heat transfer coefficient steam is low, this moment, the temperature of material was minimum, and Temperature Difference Ratio between the two is larger, has preferably heat transfer effect; Material after the preheating enters vapor heat exchanger again, this moment, material was heated, temperature is higher, but heat exchange is that the higher dry saturated steam of temperature and latent heat are very large with it, continue to have kept good heat transfer effect, the mode of this countercurrent flow has totally kept very high heat exchange efficiency, and has realized the cascade utilization of steam thermal energy, guarantee that heat energy eats dried bleeding, guaranteed the efficiency of heat-exchanger rig.
As preferred version of the present utility model, the top of described water-bath type saturated steam generator is equipped with automatic exhaust steam valve.Condensed water that small pump is mended upwards overflows with wet saturated steam after incoagulable gas is heated without deoxygenation; Because incoagulable gas is lighter than steam, so incoagulable gas is easy to gather at the equipment top.Because the temperature of incoagulable gas is lower than the temperature of steam, so when incoagulable gas gathered at the equipment top, the filling liquid in the automatic exhaust steam valve was shunk and made valve opening, incoagulable gas is effluxed; After the exhaust, be full of again steam in the automatic exhaust steam valve, temperature raises, and the filling liquid in the valve expands and makes valve closing; So automatic vent valve clearance automatic open close is discharged incoagulable gas.
As preferred version of the present utility model, the vapor phase space top of described vapor heat exchanger is equipped with vacuum breaker device and automatic exhaust steam valve.The vacuum breaker device can open and close automatically according to the pressure in the vapor heat exchanger, after device is stopped transport, along with the steam that remains in the device is condensed into condensed water gradually, the pressure of vapor heat exchanger vapor phase space reduces gradually, in case the pressure of vapor heat exchanger vapor phase space is lower than atmospheric pressure, the vacuum breaker device is opened automatically, air enters in the vapor heat exchanger, pressure with maintenance vapor heat exchanger vapor phase space is identical with atmospheric pressure, avoid vacuum to cause the equipment compression damage, prevent from simultaneously causing the condensed water suck-back, and avoid the equipment internal water accumulation that causes owing to the condensed water suck-back, metal erosion and heat-transfer surface fouling.
As preferred version of the present utility model, be provided with the U-shaped water seal between the condensed water import of the outlet of described vapor heat exchanger drain valve and described condensed water heat exchanger.Under the normal condition, be filled with condensed water in the U-shaped water seal, condensed water speed and impulsive force that the vapor heat exchanger drain valve is discharged are very large, and when flowing through the U-shaped water seal, the resistance of U-shaped water seal will make the flow velocity of condensed water descend, and impulsive force reduces, and plays the effect of energy dissipating.
As preferred version of the present utility model, described the second temperature sensor is installed on the decline pipeline section of described U-shaped water seal.Temperature herein is more stable, and it is little to fluctuate, and is beneficial to measure accurately.
As preferred version of the present utility model, the front and back of described vapor heat exchanger drain valve are in series with respectively front hydrophobic stop valve and rear hydrophobic stop valve, and the entrance of described front hydrophobic stop valve and the outlet of described rear hydrophobic stop valve are parallel with the bypass cutoff valve.Close front hydrophobic stop valve and rear hydrophobic stop valve, open the bypass cutoff valve, can safeguard or change drain valve, do not affect the operation of device.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, accompanying drawing only provides reference and explanation usefulness, and is non-in order to limit the utility model.
Fig. 1 is the structural representation of the utility model low humidity steam two effect heat-exchanger rigs.
Among the figure: 1. superheated steam; 2. Pressure gauge; 3. front steam stop; 4. pressure-control valve; 5. rear steam stop; 6. water-bath type saturated steam generator; 6a. current divider; 6b. water-bath type saturated steam generator exhaust steam valve; 6c. overflow valve; 6d. blowoff valve; 6e. water-bath type saturated steam generator automatic exhaust steam valve; 7. water-level gauge; 8. small pump; 10. steam drying heat exchanger; 10a. saturated vapor import; 10a '. the saturated vapor outlet; 10b. superheated steam import; 10b '. the superheated steam outlet; 11. vapor heat exchanger; 11a. vapor heat exchanger material inlet; 11b. vapor heat exchanger material outlet; 11c. vapor heat exchanger steam inlet; 11d. vapor heat exchanger condensation-water drain; 11e. vacuum breaker device; 11f. vapor heat exchanger automatic exhaust steam valve; 11g. vapor heat exchanger drain valve; 11h.U shape water seal; 14. condensed water heat exchanger; 14a. condensed water heat exchanger material inlet; 14b. condensed water heat exchanger material outlet; 14c. condensed water heat exchanger condensed water import; 14d. condensed water heat exchanger condensation-water drain; 15. water collect tank; 15a. water collect tank import; 15b. water collect tank outlet; 16a.PLC controller; 16b. the first temperature sensor; 16c. the second temperature sensor; 16d.DCS system; 16e. alarm.
The specific embodiment
As shown in Figure 1, low humidity steam two effect heat-exchanger rigs of the present utility model comprise overheated steam pipe, water-bath type saturated steam generator 6, small pump 8, steam drying heat exchanger 10, vapor heat exchanger 11, condensed water heat exchanger 14, water collect tank 15 and PLC controller 16a.
The cylindrical shell bottom of water-bath type saturated steam generator 6 is liquid Space, and cylindrical shell top is vapor phase space, and the roof of vapor phase space is provided with water-bath type saturated steam generator exhaust steam valve 6b, is provided with current divider 6a in the liquid Space of water-bath type saturated steam generator 6.The sidewall of water-bath type saturated steam generator 6 is equipped with water-level gauge 7 and overflow valve 6c, and overflow valve 6c can adopt Free Float Type Steam Trap.The outlet of small pump 8 links to each other with the bottom of water-bath type saturated steam generator 6 and replenishes an amount of condensed water according to the water level control signal of water-level gauge 7 in water-bath type saturated steam generator 6.The cylinder body bottom of water-bath type saturated steam generator 6 is equipped with blowoff valve 6d, and the outlet of blowoff valve 6d and overflow valve 6c all accesses delivery pipe.The top of water-bath type saturated steam generator 6 is equipped with water-bath type saturated steam generator automatic exhaust steam valve 6e.
On the export pipeline of water-bath type saturated steam generator exhaust steam valve 6b steam drying heat exchanger 10 is installed, Pressure gauge 2 and front steam stop 3 are installed on the steam source pipe road of superheated steam, the outlet of front steam stop 3 is connected with the superheated steam import 10b of steam drying heat exchanger 10, the superheated steam outlet 10b ' of steam drying heat exchanger 10 is connected with the import of the pressure-control valve 4 that is controlled by PLC controller 16a, and the outlet of pressure-control valve 4 is connected with the current divider 6a of water-bath type saturated steam generator 6 by rear steam stop 5.The saturated vapor import 10a of steam drying heat exchanger 10 is connected with the outlet of water-bath type saturated steam generator exhaust steam valve 6b, and the saturated vapor outlet 10a ' of steam drying heat exchanger 10 is connected with the vapor heat exchanger steam inlet 11c of vapor heat exchanger 11.
The vapor heat exchanger condensation-water drain 11d of vapor heat exchanger 11 is equipped with vapor heat exchanger drain valve 11g and U-shaped water seal 11h successively, the outlet of U-shaped water seal 11h is connected with the condensed water heat exchanger condensed water import 14c of condensed water heat exchanger 14, the condensed water heat exchanger condensation-water drain 14d of condensed water heat exchanger 14 is connected with the water collect tank import 15a of water collect tank 15, and the water collect tank outlet 15b of water collect tank 15 is connected with the entrance of small pump.
The material inlet pipe is connected with the condensed water heat exchanger material inlet 14a of condensed water heat exchanger 14, the condensed water heat exchanger material outlet 14b of condensed water heat exchanger 14 is connected with the vapor heat exchanger material inlet 11a of vapor heat exchanger 11, and the vapor heat exchanger material outlet 11b of vapor heat exchanger 11 connects material outlet pipe.The vapor phase space top of vapor heat exchanger 11 is equipped with vacuum breaker device 11e and vapor heat exchanger automatic exhaust steam valve 11f.
The first temperature sensor 16b is installed on the material outlet pipe, the second temperature sensor 16c is installed on the decline pipeline section of U-shaped water seal 11h, the holding wire of the first temperature sensor 16b and the second temperature sensor 16c accesses respectively the signal input part of PLC controller 16a, the aperture of the temperature signal controlled pressure control valve 4 that the control signal wire cut-in pressure control valve of PLC controller 16a, PLC controller 16a record according to the first temperature sensor 16b.The corresponding signal end of PLC controller 16a also is connected with the 16d of DCS system and alarm 16e.
The front and back of vapor heat exchanger drain valve 11g are in series with respectively front hydrophobic stop valve and rear hydrophobic stop valve, and the entrance of front hydrophobic stop valve and the outlet of rear hydrophobic stop valve are parallel with the bypass cutoff valve.
In the work, superheated steam 1 enters steam drying heat exchanger 10 through front steam stop 3 successively, superheated steam carries out indirect to saturated vapor in steam drying heat exchanger 10, superheated steam enters current divider 6a from the superheated steam outlet 10b ' outflow of steam drying heat exchanger 10 by pressure-control valve 4 and rear steam stop 5, lowered the temperature and overflowed from liquid Space from current divider 6a steam out, enter steam drying heat exchanger 10 after the water-bath type saturated steam generator exhaust steam valve 6b of roof flows out, superheated steam carries out indirect to saturated vapor and makes it to become fully dry saturated steam in steam drying heat exchanger 10.The vapor heat exchanger steam inlet 11c that the dry saturated steam that flows out from the saturated vapor of steam drying heat exchanger 10 outlet 10a ' enters vapor heat exchanger 11 heats indirectly to material again, discharged by vapor heat exchanger drain valve 11g from the condensed water that vapor heat exchanger condensation-water drain 11d flows out, through entering the condensed water heat exchanger condensed water import 14c of condensed water heat exchanger 14 behind the U-shaped water seal 11h, condensed water continues to discharge sensible heat material is carried out indirect preheating in condensed water heat exchanger 14, condensed water after the cooling flows out from condensed water heat exchanger condensation-water drain 14d, enter water collect tank 15 from water collect tank import 15a again, the condensed water that flows out from water collect tank outlet 15b is pumped into the water-bath type saturated steam generator 6 by small pump 8.
Material enters the condensed water heat exchanger material inlet 14a of condensed water heat exchanger 14 from the material inlet pipe, in condensed water heat exchanger 14, by condensed water material is carried out indirect preheating, material after the preheating enters the vapor heat exchanger material inlet 11a of vapor heat exchanger 11 from condensed water heat exchanger material outlet 14b, dry saturated steam heats again to material in vapor heat exchanger 11, and last material flows out from vapor heat exchanger material outlet 11b and enters material outlet pipe.The first temperature sensor 16b surveys the temperature of material in the material outlet pipe and offers PLC controller 16a, and PLC controller 16a is according to the aperture of material outlet adjustment pressure-control valve 4, thus the pressure of steam supply of control water-bath type saturated steam generator.
The second temperature sensor 16c is by surveying the duty that the condensed water water temperature can perception vapor heat exchanger drain valve 11g, in case vapor heat exchanger drain valve 11g leaks, the temperature that the second temperature sensor 16c detects will be higher than the maximum temperature that PLC controller 16a sets, in case otherwise vapor heat exchanger drain valve 11g stop up, the temperature that the second temperature sensor 16c detects will be lower than the minimum temperature that PLC controller 16a sets.The temperature that the second temperature sensor 16c detects is not between maximum temperature that PLC controller 16a sets and minimum temperature the time, and PLC controller 16a drives alarm 16e and reports to the police, and to the 16d of DCS system transmitted signal.
Vacuum breaker device 11e can open and close automatically according to the pressure in the vapor heat exchanger 11, after device is stopped transport, along with the steam that remains in the device is condensed into condensed water gradually, the pressure of vapor heat exchanger 11 vapor phase spaces reduces gradually, in case the pressure of vapor heat exchanger 11 vapor phase spaces is lower than atmospheric pressure, vacuum breaker device 11e opens automatically, air enters in the vapor heat exchanger 11, pressure with maintenance vapor heat exchanger 11 vapor phase spaces is identical with atmospheric pressure, avoid vacuum to cause the equipment compression damage, prevent from simultaneously causing the condensed water suck-back, and avoid the equipment internal water accumulation that causes owing to the condensed water suck-back, metal erosion and heat-transfer surface fouling.When vapor heat exchanger 11 started, the vacuum breaker device was with autoshutdown.The vacuum breaker device preferably uses the strong T55 type of Taiwan Chinese vacuum breaker device, or the VB vacuum breaker device of Britain Si Paishake.
Because incoagulable gas is lighter than steam, gather so upwards be flowing in the top of equipment, because the temperature of incoagulable gas is lower than the temperature of steam, the filling liquid in the automatic exhaust steam valve is shunk and is made valve opening, incoagulable gas is effluxed; After the exhaust, be full of again steam in the automatic exhaust steam valve, temperature raises, and the filling liquid in the valve expands and makes valve closing; So automatic vent valve clearance automatic open close is discharged incoagulable gas.Automatic exhaust steam valve preferably adopts the strong S61 type of Taiwan Chinese automatic exhaust steam valve, or the product of the same type of Britain Si Paishake spirax, U.S. Armstrong armstrong.
The above only is the better possible embodiments of the utility model, and is non-so limit to scope of patent protection of the present utility model.In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (6)
1. a low humidity steam two is imitated heat-exchanger rigs, comprise water-bath type saturated steam generator and small pump, the cylindrical shell bottom of described water-bath type saturated steam generator is liquid Space, cylindrical shell top is vapor phase space, the roof of described vapor phase space is provided with exhaust steam valve, be provided with current divider in the described liquid Space, described moisturizing delivery side of pump links to each other with the bottom of described water-bath type saturated steam generator, it is characterized in that: on the export pipeline of described water-bath type saturated steam generator exhaust steam valve the steam drying heat exchanger is installed, the superheated steam import of described steam drying heat exchanger is connected with the steam source pipe road of superheated steam, the superheated steam outlet of described steam drying heat exchanger is equipped with the pressure-control valve that is controlled by the PLC controller, the outlet of described pressure-control valve is connected with the current divider of described water-bath type saturated steam generator, the saturated vapor import of described steam drying heat exchanger is connected with the outlet of described water-bath type saturated steam generator exhaust steam valve, the saturated vapor outlet of described steam drying heat exchanger is connected with the steam inlet of vapor heat exchanger, the outlet that the condensation-water drain of vapor heat exchanger is provided with drain valve and drain valve is connected with the condensed water import of condensed water heat exchanger, the condensation-water drain of condensed water heat exchanger is connected with the import of water collect tank, and the outlet of water collect tank is connected with the entrance of described small pump; The material inlet pipe is connected with the material inlet of described condensed water heat exchanger, and the material outlet of condensed water heat exchanger is connected with the material inlet of described vapor heat exchanger, and the material outlet of vapor heat exchanger connects material outlet pipe; The first temperature sensor is installed on the described material outlet pipe, the outlet of described vapor heat exchanger drain valve is equipped with the second temperature sensor, the holding wire of described the first temperature sensor and the second temperature sensor accesses respectively the signal input part of described PLC controller, and the control signal wire of described PLC controller accesses described pressure-control valve.
2. low humidity steam two according to claim 1 is imitated heat-exchanger rigs, and it is characterized in that: the top of described water-bath type saturated steam generator is equipped with automatic exhaust steam valve.
3. low humidity steam two according to claim 1 is imitated heat-exchanger rigs, and it is characterized in that: the vapor phase space top of described vapor heat exchanger is equipped with vacuum breaker device and automatic exhaust steam valve.
4. low humidity steam two effect heat-exchanger rigs according to claim 1 is characterized in that: be provided with the U-shaped water seal between the condensed water import of the outlet of described vapor heat exchanger drain valve and described condensed water heat exchanger.
5. low humidity steam two according to claim 4 is imitated heat-exchanger rigs, and it is characterized in that: described the second temperature sensor is installed on the decline pipeline section of described U-shaped water seal.
6. each described low humidity steam two effect heat-exchanger rigs in 5 according to claim 1, it is characterized in that: the front and back of described vapor heat exchanger drain valve are in series with respectively front hydrophobic stop valve and rear hydrophobic stop valve, and the entrance of described front hydrophobic stop valve and the outlet of described rear hydrophobic stop valve are parallel with the bypass cutoff valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220530562 CN202884889U (en) | 2012-10-17 | 2012-10-17 | Low-humidity steam two-effect heat exchanging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220530562 CN202884889U (en) | 2012-10-17 | 2012-10-17 | Low-humidity steam two-effect heat exchanging device |
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| Publication Number | Publication Date |
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| CN202884889U true CN202884889U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220530562 Withdrawn - After Issue CN202884889U (en) | 2012-10-17 | 2012-10-17 | Low-humidity steam two-effect heat exchanging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889576A (en) * | 2012-10-17 | 2013-01-23 | 亿恒节能科技江苏有限公司 | Low-humidity steam double-effect heat exchange system |
-
2012
- 2012-10-17 CN CN 201220530562 patent/CN202884889U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889576A (en) * | 2012-10-17 | 2013-01-23 | 亿恒节能科技江苏有限公司 | Low-humidity steam double-effect heat exchange system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20140423 |
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| RGAV | Abandon patent right to avoid regrant |