CN102226516A - Method and device for preventing boiler waste heat recovery hot water from causing cavitation on boiler feed pump - Google Patents
Method and device for preventing boiler waste heat recovery hot water from causing cavitation on boiler feed pump Download PDFInfo
- Publication number
- CN102226516A CN102226516A CN2011100812212A CN201110081221A CN102226516A CN 102226516 A CN102226516 A CN 102226516A CN 2011100812212 A CN2011100812212 A CN 2011100812212A CN 201110081221 A CN201110081221 A CN 201110081221A CN 102226516 A CN102226516 A CN 102226516A
- Authority
- CN
- China
- Prior art keywords
- boiler
- water
- pump
- hot water
- feed pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention relates to a method and device for preventing boiler waste heat recovery hot water from causing cavitation on a boiler feed pump. In the invention, a heat exchanger is arranged on the outlet pipe section of a flue, the smoke discharged by a boiler exchanges heat with the water in the heat exchanger and then is discharged; the heat exchanger carries out the heat exchange through inputting cold water, the cold water in the hot exchanger is provided by the water-replenishing tank of the boiler; the cold water in the water-replenishing tank of the boiler is sent to the heat exchanger through a waste heat water circulating pump, and then the cold water is subjected to heat exchange so as to become hot water, and the hot water enters into a heat-preservation hot water tank, the hot water is sent into the boiler feed pump from the lower part of the hot water tank through a pipeline, the boiler feed pump serving as a water source supplies water for the boiler; and a pressure-keeping device is arranged on the side of the hot water tank, the pressure-keeping device is communicated with the hot water tank through a pipeline, and the pressure-keeping device can ensure that the boiler feed pump has water pressure for preventing water pump hot water from causing cavitation when the boiler feed pump is started.
Description
Technical field
The present invention relates to a kind of boiler water supply method and device, refer in particular to and a kind ofly utilize waste heat recovery to prevent from the hot water to make boiler feed pump produce the method and the device of cavitation because of hot water for boiler provides, be mainly used in the gas fired-boiler, but also may be used in other boiler afterheat recovering devices or the hot water water supply installation.
Background technology
Industrial fuel oil, combustion gas, when coal-burning boiler manufactures and designs, in order to prevent heated surface at the end of boiler corrosion and stifled ash, the standard state exhaust gas temperature generally is not less than 180 ℃, reaches as high as 250 ℃, the high-temperature flue gas discharging not only causes a large amount of thermal waste, and the while is contaminated environment also.Reclaim the heat heating boiler moisturizing in the flue gas, can improve efficiency of energy utilization significantly.Thereby the fuel saving expense reduces production costs, and reduces toxic emission.
After boiler replenishing water was heated intensification, saturated vapor pressure raise, saturated vapor pressure 2.3346 kPa during 20 ℃ of water temperatures, and just to raise be 101.330 kPa to saturated vapor pressure during 100 ℃ of water temperatures.And the condition of the normal water inlet of boiler feed pump to be inlet pressure at pump be not less than the water saturation vapour pressure, otherwise, will produce cavitation, cause feed pump not intake, even damage.When being original normal-temperature water, boiler can normally be intake, now recycle the waste heat heating boiler moisturizing in the boiler smoke after, just may undesired the water inlet.
Existing waste-heat recovery device: a kind of is that water was in high pressure conditions behind feed pump, cavitation can not take place after it was located at boiler feed pump.But it can only be an efficiency operation just under boiler combustion and the synchronous state of water inlet, but usually during boiler operatiopn, does not often accomplish synchronously inefficiency in the actual motion.Another kind is before waste-heat recovery device is located at boiler feed pump, is sent to the high-temperature water tank installed of high position more through the high-temperature-hot-water of waste-heat recovery device, forms the prepressurized water post by the installation site difference of elevated tank and boiler feed pump.Heat recovery efficiency is much improved like this, but the raising of the installation site of high temperature water-supply water tank, as boiler dress Stall, high temperature water-supply water tank dress second floor.Certainly will cause making, mounting cost to increase greatly.Therefore necessary this is improved.
Summary of the invention
The objective of the invention is to prevent the deficiency of boiler feed pump cavitation method and device at existing boiler afterheat recovering device, provide a kind of more easy boiler afterheat that prevents to reclaim method and device that hot water makes the supply-water pump cavitation, before this method and device are located at boiler feed pump, but no longer need to establish the high temperature water-supply water tank that a traditional high position is installed.
Goal of the invention of the present invention is achieved through the following technical solutions: a kind of boiler afterheat that prevents reclaims the method that hot water makes the boiler feed pump cavitation, one heat exchanger is set in the outlet pipe section of flue, flue gas that boiler is discharged earlier through with heat exchanger in water carry out discharging again after the heat exchange; Heat exchanger carries out heat exchange by input cold water, and the cold water in the heat exchanger is provided by the water supply tank of boiler; Cold water is sent in the heat exchanger via the waste heat water circulating pump in the boiler replenishing water case, in heat exchange, carry out heat exchange then and become hot water, then enter in the boiler that has insulation, be transported to boiler feed pump from the boiler bottom by pipeline again again, by boiler feed pump as the water source to boiler water supply; Be provided with a pressurizer on the boiler side, pressurizer is communicated with boiler by pipeline, and pressurizer can guarantee when the boiler feedwater pump startup that boiler feed pump has the hydraulic pressure that prevents pump hot water generation cavitation.Described pressurizer is the mechanical type pressurizer, is a kind of pressurizer by pressure that water level forms; Concrete pressurizer can be in system and device, substantially become on the platform of level with boiler below boiler being arranged on the horizontal plane of heat exchanger, the pressurize of boiler is by on the boiler side one pressurize standpipe being set, the pressurize standpipe is communicated with by pipeline with boiler, at the waste heat water circulating pump during to boiler pump hot water, the pressurize standpipe is under the pump function of waste heat water circulating pump, its water level will raise along with the increase of pump pressure, and can keep boiler to have when the waste heat water circulating pump is out of service enough preventing boiler feed pump from producing the required pressure of cavitation; Moment when the boiler feedwater pump startup produces cavitation when preventing the boiler feedwater pump startup by the pressurize standpipe for hydraulic pressure that boiler provided.Described pressurize standpipe can stand vertically, but also can be oblique layout; Pressurize standpipe vertical height prevents that according to boiler feed pump the required hydraulic pressure of hot water cavitation is converted into water-column by force and determines; Top at the pressurize standpipe is provided with emptying device, emptying device directly communicates with atmosphere, to prevent the hypertonia of boiler, and the place is connected to the bypass leak-off pipe in the pressurize riser top, leak-off pipe communicates with the water supply tank of boiler, when the hypertonia of boiler, the hot water that covers the pressurize riser top will flow into the boiler replenishing water case by leak-off pipe; In order to prevent that the hot water when the waste heat water circulating pump quits work from refluxing, in the connecting line of boiler and waste heat water circulating pump, be provided with the check device that prevents that hot water from refluxing, when quitting work, the waste heat water circulating pump can prevent effectively that hot water from refluxing.
Reclaim the device that hot water makes the boiler feed pump cavitation according to the boiler afterheat that prevents that said method proposed, comprise boiler body, on boiler body, be provided with the flue discharge pipe, in flue discharge pipeline section, heat exchanger is installed, heat exchanger is a water-cooled heat exchanger, the water inlet of heat exchanger is communicated with the outlet of waste heat water circulating pump, and the water circulating pump inlet connects water supply tank, and heat exchanger is by the water supply tank moisturizing; The delivery port of heat exchanger is communicated with an external boiler, and by of the water extraction of waste heat water circulating pump with water supply tank, become hot water via heat exchanger and inject boiler, the bottom of boiler is provided with hot water outlet, the hot water outlet of boiler links to each other with the inlet of boiler feed pump by pipeline, and the boiler feedwater delivery side of pump supplies water to boiler body by pipeline; Be provided with a pressurizer on the boiler side, pressurizer is communicated with boiler by pipeline, and pressurizer can guarantee when the boiler feedwater pump startup that boiler feed pump has the hydraulic pressure that prevents pump hot water generation cavitation.Described pressurizer is the mechanical type pressurizer, is a kind of pressurizer by pressure that water level forms; Concrete pressurizer can be in system and device, substantially become on the platform of level with boiler below boiler being arranged on the horizontal plane of heat exchanger, the pressurize of boiler is by on the boiler side one pressurize standpipe being set, the pressurize standpipe is communicated with by pipeline with boiler, at the waste heat water circulating pump during to boiler pump hot water, the pressurize standpipe is under the pump function of waste heat water circulating pump, its water level will raise along with the increase of pump pressure, and can keep boiler to have when the waste heat water circulating pump is out of service enough preventing boiler feed pump from producing the required pressure of cavitation; Moment when the boiler feedwater pump startup produces cavitation when preventing the boiler feedwater pump startup by the pressurize standpipe for hydraulic pressure that boiler provided.Described pressurize standpipe can stand vertically, but also can be oblique layout; Pressurize standpipe vertical height prevents that according to boiler feed pump the required hydraulic pressure of hot water cavitation is converted into water-column by force and determines; Top at the pressurize standpipe is provided with emptying device, emptying device directly communicates with atmosphere, to prevent the hypertonia of boiler, and be connected to the bypass leak-off pipe in the pressurize riser top, leak-off pipe communicates with the water supply tank of boiler, when the hypertonia of boiler, the hot water that covers the pressurize riser top will flow into the boiler replenishing water case by leak-off pipe; In order to prevent that the hot water when the waste heat water circulating pump quits work from refluxing, in the connecting line of boiler and waste heat water circulating pump, be provided with the check device that prevents that hot water from refluxing, when quitting work, the waste heat water circulating pump can prevent effectively that hot water from refluxing.
Operation principle of the present invention is: when boiler startup, the high-temperature flue gas that is come by the boiler heat exchanger of flowing through is passed to heat transferring medium with heat, and cooling back flue gas is discharged through chimney again.When putting into operation for the first time, start earlier the waste heat water circulating pump, and water filling in boiler, make the water level of pressurize standpipe rise simultaneously, form and prevent the pressure that the boiler feedwater pump cavitation is required, for boiler feed pump provides high pressure when starting shipment; Waste heat water circulating pump and boiler feed pump start simultaneously later on, boiler feed pump is pumped into the hot water in the boiler in the boiler, the waste heat water circulating pump pumps into heat exchanger with the cold water that water supply tank comes simultaneously, hot water is additional to be entered in the boiler via becoming behind the heat exchanger, makes the water level of pressurize standpipe maintain desired location; After a boiler feedwater puts in place, boiler feed pump stops to supply water, the waste heat water circulating pump starts shipment by the temperature sensor control that is arranged in the flue later on, when the detected temperature of temperature sensor is lower than the temperature that needs heat exchanger operation with stoppage in transit waste heat water circulating pump, the waste heat water circulating pump will put into operation when the detected temperature of temperature sensor is higher than the temperature that needs the heat exchanger operation, to stop the water in the boiler to reflux by the check device that is installed in the connecting line between boiler and the heat exchanger after the waste heat water circulating pump is stopped transport, and keep the hydraulic pressure of boiler by the water level of pressurize standpipe; Startup moment when starting boiler feed pump once more to boiler water supply, the cavitation erosion when preventing the boiler feedwater pump startup by the formed hydraulic pressure of pressurize standpipe.
Beneficial effect of the present invention: reclaim the instant required make-up water of heat heating boiler in the high-temperature flue gas, no cavitation high-temperature water advances boiler through boiler feed pump; Need not set up the high-order feed-water tank of high temperature, make, mounting cost is few, boiler needs how much water of supply, and how much hot water it just produces, and makes the feed water temperature of boiler the highest, the energy-saving efficiency height; Its hot water stockage is few, and volume is little, and the appearance area of dissipation is few, and heat radiation is few, can purify flue gas simultaneously, and energy-conserving and environment-protective kill two birds with one stone.
Description of drawings
Fig. 1 is a flow chart of the present invention;
Fig. 2 is the structural representation of an embodiment of the present invention;
Fig. 3 is the structural representation of the another kind of embodiment of the present invention.
The specific embodiment
Be described further below in conjunction with accompanying drawing
As shown in Figure 1, the present invention relates to a kind of boiler afterheat that prevents and reclaim the method that hot water makes the boiler feed pump cavitation, a heat exchanger is set in the outlet pipe section of flue, the flue gas that boiler is discharged earlier through with heat exchanger in water carry out discharging again after the heat exchange; Heat exchanger carries out heat exchange by input cold water, and the cold water in the heat exchanger is provided by the water supply tank of boiler; The flue gas heat exchange of cold water in over-heat-exchanger becomes hot water, sent into by the waste heat water circulating pump in the boiler that has insulation, is transported to boiler feed pump from the boiler bottom by pipeline again again, by boiler feed pump as the water source to boiler water supply; Be provided with a pressurizer on the boiler side, pressurizer is communicated with boiler by pipeline, and pressurizer can guarantee when the boiler feedwater pump startup that boiler feed pump has the hydraulic pressure that prevents pump hot water generation cavitation.Described pressurizer is the mechanical type pressurizer, is a kind of pressurizer by pressure that water level forms; Concrete pressurizer can be in system and device, substantially become on the platform of level with boiler below boiler being arranged on the horizontal plane of heat exchanger, the pressurize of boiler is by on the boiler side one pressurize standpipe being set, the pressurize standpipe is communicated with by pipeline with boiler, at the waste heat water circulating pump during to boiler pump hot water, the pressurize standpipe is under the pump function of waste heat water circulating pump, its water level will raise along with the increase of pump pressure, and can keep boiler to have when the waste heat water circulating pump is out of service enough preventing boiler feed pump from producing the required pressure of cavitation; Moment when the boiler feedwater pump startup produces cavitation when preventing the boiler feedwater pump startup by the pressurize standpipe for hydraulic pressure that boiler provided.Described pressurize standpipe can stand vertically, but also can be oblique layout; Pressurize standpipe vertical height prevents that according to boiler feed pump the required hydraulic pressure of hot water cavitation is converted into water-column by force and determines; Top at the pressurize standpipe is provided with emptying device, emptying device directly communicates with atmosphere, to prevent the hypertonia of boiler, and be connected to the bypass leak-off pipe in the pressurize riser top, leak-off pipe communicates with the water supply tank of boiler, when the hypertonia of boiler, the hot water that covers the pressurize riser top will flow into the boiler replenishing water case by leak-off pipe; In order to prevent that the hot water when the waste heat water circulating pump quits work from refluxing, in the connecting line of boiler and waste heat water circulating pump, be provided with the check device that prevents that hot water from refluxing, when quitting work, the waste heat water circulating pump can prevent effectively that hot water from refluxing.
Embodiment one
Prevent that according to said method proposed boiler afterheat from reclaiming device that hot water makes the boiler feed pump cavitation as shown in Figure 2, comprise boiler body 1, on boiler body 1, be provided with flue discharge pipe 4, in flue discharge pipeline section 4, heat exchanger 5 is installed, heat exchanger 5 is a water-cooled heat exchanger, the water inlet of heat exchanger 5 is communicated with water supply tank 10, and heat exchanger 5 is by water supply tank 10 moisturizings; The delivery port of heat exchanger 5 is communicated with by pipeline 8 with an external boiler 9, and pass through waste heat water circulating pump 7 and extract the hot water in the heat exchanger 5 out injection boiler 9, the bottom of boiler 9 is provided with hot water outlet, the hot water outlet of boiler 9 links to each other with the inlet of boiler feed pump 2 by pipeline 15, and the outlet of boiler feed pump 2 supplies water for boiler body 1 by pipeline 3; Be provided with a pressurizer on boiler 9 sides, pressurizer is communicated with boiler 9 by pipeline, and pressurizer can guarantee when the boiler feedwater pump startup that boiler feed pump has the hydraulic pressure that prevents pump hot water generation cavitation.Described pressurizer is the mechanical type pressurizer, is a kind of pressurizer by pressure that water level forms; Concrete pressurizer can be in system and device, substantially become on the platform of level with boiler body 1 below boiler 9 being arranged on the horizontal plane of heat exchanger 5, the pressurize of boiler 9 is by on boiler 9 sides one pressurize standpipes 12 being set, pressurize standpipe 12 and boiler 9 are communicated with by pipeline, at waste heat water circulating pump 7 during to boiler 9 pump hot water, pressurize standpipe 12 is under the pump function of waste heat water circulating pump 7, its water level will raise along with the increase of pump pressure, and can keep boiler to have when waste heat water circulating pump 7 is out of service preventing that enough boiler feed pump from producing the required pressure of cavitation; Moment when boiler feed pump 2 starts produces cavitation when preventing the boiler feedwater pump startup by pressurize standpipe 12 for hydraulic pressure that boiler provided.Described pressurize standpipe 12 can stand vertically, but also can be oblique layout; Pressurize standpipe 12 vertical heights prevent that according to boiler feed pump the required hydraulic pressure of hot water cavitation is converted into water-column by force and determines; Top at pressurize standpipe 12 is provided with emptying device 14, emptying device 14 directly communicates with atmosphere, to prevent the hypertonia of boiler 9, and be connected to bypass leak-off pipe 13 at pressurize standpipe 12 tops, leak-off pipe 13 communicates with the water supply tank 10 of boiler, when the hypertonia of boiler 9, the hot water that covers pressurize standpipe 12 tops will flow into boiler replenishing water casees 10 by leak-off pipe 3; In order to prevent that the hot water when waste heat water circulating pump 7 quits work from refluxing, in the connecting line of boiler and waste heat water circulating pump, be provided with the check device 11 that prevents that hot water from refluxing, when quitting work, waste heat water circulating pump 7 can prevent effectively that hot water from refluxing.Be provided with smoke temperature controller 16 in the discharge flue 6 after heat exchanger 5, record the temperature of smoke in the flue by smoke temperature controller 16, thus the startup of control waste heat water circulating pump 7 or close.When the smoke temperature surpassed setting value, waste heat water circulating pump 7 started; When the smoke temperature was lower than setting value, waste heat water circulating pump 7 was out of service, and carry out pressurize by pressurizer to boiler this moment.
Application by reality, on two tons of horizontal gas fired-boilers, boiler design pressure 1.3MPa, this boiler is transformed, on the original smokejack of boiler, installed this contrive equipment additional, observed trial run 1 year, advanced boiler water and can be preheating to about 90 ℃, exhaust gas temperature can drop to below 55 ℃, and ton steam-natural gas saving rate reaches more than 8%.
Embodiment two
The basic structure of present embodiment is consistent with embodiment one, and just pipeline is arranged some difference a little.In this embodiment, in the water supply line 15 that boiler is connected with boiler feed pump, be connected to a loop branch pipe 18,18 1 of loop branch pipes communicate with water supply line 15 under the boiler, the other end communicates with the water supply suction line of waste heat water circulating pump 7, the suction pipeline section of while at the water supply suction line of waste heat water circulating pump 7 is provided with electric control one-way valve 17, electric control one-way valve 17 is closed under the situation of the water abundance of boiler 9, not conducting, make heat exchanger 5, form a unidirectional closed circuit between waste heat water circulating pump 7 and the boiler 9, can further improve the water temperature of boiler like this; For anti-sealing directly flows into boiler feed pump 2 from loop branch pipe 18, among the pipeline section of loop branch pipe 18, be provided with circulation check valve 19 simultaneously.
Claims (10)
1. one kind prevents that boiler afterheat from reclaiming the method that hot water makes the boiler feed pump cavitation, is characterized in that: a heat exchanger is set in the outlet pipe section of flue, the flue gas that boiler is discharged earlier through with heat exchanger in water carry out discharging again after the heat exchange; Heat exchanger carries out heat exchange by input cold water, and the cold water in the heat exchanger is provided by the water supply tank of boiler; Cold water is sent in the heat exchanger via the waste heat water circulating pump in the boiler replenishing water case, in heat exchange, carry out heat exchange then and become hot water, then enter in the boiler that has insulation, be transported to boiler feed pump from the boiler bottom by pipeline again again, by boiler feed pump as the water source to boiler water supply; Be provided with a pressurizer on the boiler side, pressurizer is communicated with boiler by pipeline, and pressurizer can guarantee when the boiler feedwater pump startup that boiler feed pump has the hydraulic pressure that prevents pump hot water generation cavitation.
2. the boiler afterheat that prevents according to claim 1 reclaims the method that hot water makes the boiler feed pump cavitation, and it is characterized in that: described pressurizer is the mechanical type pressurizer, is a kind of pressurizer by pressure that water level forms.
3. the boiler afterheat that prevents according to claim 2 reclaims the method that hot water makes the boiler feed pump cavitation, it is characterized in that: described pressurizer is in system and device, substantially become on the platform of level with boiler below boiler being arranged on the horizontal plane of heat exchanger, the pressurize of boiler is by on the boiler side one pressurize standpipe being set, the pressurize standpipe is communicated with by pipeline with boiler, at the waste heat water circulating pump during to boiler pump hot water, the pressurize standpipe is under the pump function of waste heat water circulating pump, its water level will raise along with the increase of pump pressure, and can keep boiler to have when the waste heat water circulating pump is out of service enough preventing boiler feed pump from producing the required pressure of cavitation; Moment when the boiler feedwater pump startup produces cavitation when preventing the boiler feedwater pump startup by the pressurize standpipe for hydraulic pressure that boiler provided.
4. the boiler afterheat that prevents according to claim 1 reclaims the method that hot water makes the boiler feed pump cavitation, and it is characterized in that: described pressurize standpipe stands vertically or oblique layout.
5. reclaim the method that hot water makes the boiler feed pump cavitation according to claim 3 or the 4 described boiler afterheats that prevent, it is characterized in that: described pressurize standpipe vertical height prevents that according to boiler feed pump the required hydraulic pressure of hot water cavitation is converted into water-column by force and determines.
6. reclaim the method that hot water makes the boiler feed pump cavitation according to claim 3 or the 4 described boiler afterheats that prevent, it is characterized in that: the top at the pressurize standpipe is provided with emptying device, and emptying device directly communicates with atmosphere, to prevent the hypertonia of boiler; And be connected to the bypass leak-off pipe in the pressurize riser top, leak-off pipe communicates with the water supply tank of boiler, and when the hypertonia of boiler, the hot water that covers the pressurize riser top will flow into the boiler replenishing water case by leak-off pipe.
7. reclaim the method that hot water makes the boiler feed pump cavitation according to claim 3 or the 4 described boiler afterheats that prevent, it is characterized in that: reflux in order to prevent the hot water when the waste heat water circulating pump quits work, in the connecting line of boiler and waste heat water circulating pump, be provided with the check device that prevents that hot water from refluxing.
8. one kind prevents that boiler afterheat from reclaiming the device that hot water makes the boiler feed pump cavitation, comprise boiler body, on boiler body, be provided with the flue discharge pipe, it is characterized in that: discharge in the pipeline section at flue heat exchanger is installed, heat exchanger is a water-cooled heat exchanger, the water inlet of heat exchanger is communicated with the outlet of waste heat water circulating pump, and the water circulating pump inlet connects water supply tank, and heat exchanger is by the water supply tank moisturizing; The delivery port of heat exchanger is communicated with an external boiler, and by of the water extraction of waste heat water circulating pump with water supply tank, become hot water via heat exchanger and inject boiler, the bottom of boiler is provided with hot water outlet, the hot water outlet of boiler links to each other with the inlet of boiler feed pump by pipeline, and the boiler feedwater delivery side of pump supplies water to boiler body by pipeline; Be provided with a pressurizer on the boiler side, pressurizer is communicated with boiler by pipeline, and pressurizer can guarantee when the boiler feedwater pump startup that boiler feed pump has the hydraulic pressure that prevents pump hot water generation cavitation.
9. the boiler afterheat that prevents according to claim 8 reclaims the device that hot water makes the boiler feed pump cavitation, and it is characterized in that: described pressurizer is the mechanical type pressurizer, is a kind of pressurizer by pressure that water level forms.
10. the boiler afterheat that prevents according to claim 8 reclaims the device that hot water makes the boiler feed pump cavitation, it is characterized in that: described pressurizer is in system and device, substantially become on the platform of level with boiler below boiler being arranged on the horizontal plane of heat exchanger, the pressurize of boiler is by on the boiler side one pressurize standpipe being set, the pressurize standpipe is communicated with by pipeline with boiler, at the waste heat water circulating pump during to boiler pump hot water, the pressurize standpipe is under the pump function of waste heat water circulating pump, its water level will raise along with the increase of pump pressure, and can keep boiler to have when the waste heat water circulating pump is out of service enough preventing boiler feed pump from producing the required pressure of cavitation; Moment when the boiler feedwater pump startup produces cavitation when preventing the boiler feedwater pump startup by the pressurize standpipe for hydraulic pressure that boiler provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110081221 CN102226516B (en) | 2011-04-01 | 2011-04-01 | Method and device for preventing boiler waste heat recovery hot water from causing cavitation on boiler feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110081221 CN102226516B (en) | 2011-04-01 | 2011-04-01 | Method and device for preventing boiler waste heat recovery hot water from causing cavitation on boiler feed pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102226516A true CN102226516A (en) | 2011-10-26 |
| CN102226516B CN102226516B (en) | 2013-06-19 |
Family
ID=44807505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110081221 Expired - Fee Related CN102226516B (en) | 2011-04-01 | 2011-04-01 | Method and device for preventing boiler waste heat recovery hot water from causing cavitation on boiler feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102226516B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796026A (en) * | 2017-12-08 | 2018-03-13 | 李尚福 | Waste heat gas environmental protection retracting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2162550Y (en) * | 1993-05-18 | 1994-04-20 | 大连汇能高新技术开发公司 | Anti-gas-etching device for automatic high-temp. water supply pump of boiler |
| JP2003021305A (en) * | 2001-07-04 | 2003-01-24 | Hitachi Ltd | Boiler feed water supply system |
| CN201196410Y (en) * | 2008-04-23 | 2009-02-18 | 大连汇能技术服务有限公司 | Low-grade thermal deoxidization device |
| JP2009287901A (en) * | 2008-05-31 | 2009-12-10 | Samson Co Ltd | Boiler having booster pump |
| CN101846105A (en) * | 2010-06-11 | 2010-09-29 | 华北电力科学研究院(西安)有限公司 | Anti-cavitation protection device of feedwater pump |
-
2011
- 2011-04-01 CN CN 201110081221 patent/CN102226516B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2162550Y (en) * | 1993-05-18 | 1994-04-20 | 大连汇能高新技术开发公司 | Anti-gas-etching device for automatic high-temp. water supply pump of boiler |
| JP2003021305A (en) * | 2001-07-04 | 2003-01-24 | Hitachi Ltd | Boiler feed water supply system |
| CN201196410Y (en) * | 2008-04-23 | 2009-02-18 | 大连汇能技术服务有限公司 | Low-grade thermal deoxidization device |
| JP2009287901A (en) * | 2008-05-31 | 2009-12-10 | Samson Co Ltd | Boiler having booster pump |
| CN101846105A (en) * | 2010-06-11 | 2010-09-29 | 华北电力科学研究院(西安)有限公司 | Anti-cavitation protection device of feedwater pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796026A (en) * | 2017-12-08 | 2018-03-13 | 李尚福 | Waste heat gas environmental protection retracting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102226516B (en) | 2013-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202132932U (en) | Boiler waste heat recovery water device | |
| CN110454769B (en) | Control system and control method for high-backpressure steam-driven feed pump of large generator set | |
| CN103817099A (en) | Automatic water supplying steam washer | |
| CN201074826Y (en) | Flue gas/oil-fired boiler energy conservation equipment | |
| CN104819054A (en) | Distributed energy resource waste heat utilization system | |
| CN206037003U (en) | Secondary reheating unit EC BEST steam turbine steam exhaust heating deoxidization boiler feed water's thermodynamic system | |
| CN201531282U (en) | Vacuum deoxygenation condensation system | |
| CN105019957B (en) | Efficiently heat regenerative system and method | |
| CN102226516B (en) | Method and device for preventing boiler waste heat recovery hot water from causing cavitation on boiler feed pump | |
| CN104180359B (en) | Large-tonnage subcritical pressure boiler steam generator | |
| CN204704010U (en) | A kind of bootstrap system of distributed energy | |
| JP2008180158A (en) | Steam recovery facility and steam recovery method | |
| CN201322291Y (en) | Steam generator | |
| CN205957140U (en) | Heating system that heat utilization efficiency is high | |
| CN104848289A (en) | Efficient heat-supply heating heat-exchange unit adopting steam heat source | |
| CN212335542U (en) | Waste heat recovery system of setting machine | |
| CN209431389U (en) | A kind of waste incineration and generating electricity heat energy recycling system of air compressor | |
| CN104848304A (en) | Energy-saving and emission-reducing steam heat exchange station | |
| CN210740372U (en) | Large-scale generating set high back pressure steam-driven feed pump control system | |
| CN208419663U (en) | A kind of device for recycling condensed water | |
| CN202791969U (en) | Heat accumulating type boiler flue gas afterheat-recycling efficient energy-saving device | |
| CN202791977U (en) | DC (direct current) coal-fired generating unit starting system | |
| CN201228565Y (en) | Extraction condensing steam turbine power generation system | |
| CN206709053U (en) | A kind of power station recirculated water smoke waste heat comprehensive utilization system | |
| CN206339122U (en) | A kind of new compressor air inlet machine heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA CHEMICAL INDUSTRY ZHUZHOU RUBBER RESEARCH AN Free format text: FORMER NAME: CHINA CHEMICAL INDUSTRY RUBBER ZHUZHOU RESEARCH AND DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Xinhua Road 412003 Hunan province Zhuzhou Hetang District No. 818 Patentee after: Rubber studying and designing institute, China Chemical Industry Zhuzhou company limited Address before: Xinhua Road 412003 Hunan province Zhuzhou Hetang District No. 818 Patentee before: Zhuzhou Research & Design Institute, Chemchina Rubber Corp. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20200401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |