CN104990264A - Full-condensation boiler - Google Patents
Full-condensation boiler Download PDFInfo
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- CN104990264A CN104990264A CN201510463147.9A CN201510463147A CN104990264A CN 104990264 A CN104990264 A CN 104990264A CN 201510463147 A CN201510463147 A CN 201510463147A CN 104990264 A CN104990264 A CN 104990264A
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- water
- boiler
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- condenser
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The invention discloses a full-condensation boiler. A boiler body is connected with a hot and cold water regionalized water tank and an outer circulating water path of the hot and cold water regionalized water tank; the hot and cold regionalized water tank is divided into a cold water region and a hot water region; the outer circulating water path includes an energy saving device, a condenser, a circulating pump and a feed pump; room-temperature softened water enters the cold water region, and enters the condenser through the circulating pump, and goes back to the hot water region, and enters the energy saving device through the feed pump; after the energy saving device is connected with the independent hot and cold water regionalized water tank, soft water which flows circularly under normal pressure in the energy saving device constantly to recover waste heat and store heat regardless of whether water is supplemented in the operation of the boiler; the feed-water temperature of the boiler can be improved, and big fire burning pressure-increasing time can be shortened, and fuel consumption can be reduced. The full-condensation boiler can be adopted as a boiler in which water vapor content in flue gas is high, especially adopted as a gas-fired boiler.
Description
Technical field
The present invention relates to a kind of boiler, especially full condensing boiler.
Background technology
In boiler, after the complete combustion of fuel of particularly gas fired-boiler, its flue gas is cooled to original temperature, steam is wherein called high calorific power with condensate water state discharge time institute's liberated heat, and steam is still for steam condition time institute liberated heat is called low heat valve.
The high calorific power of fuel is numerically greater than its low heat valve, and difference is the latent heat of vaporization of steam, and after the burning of fuel type difference, the ratio of steam shared by flue gas is also different.Natural gas is larger containing the ratio of protium, the content that burning produces the water vapour in flue gas is large, natural gas high calorific power 9450kcal/Nm3-heat of vaporization 950kcal/Nm3(latent heat)=low heat valve 8500kcal/Nm3,1.7Kg water vapour can be produced after every 1Nm3 combustion of natural gas, the considerable latent heat of vaporization is contained in visible the inside, about 4000kJ, accounts for about 10% of natural gas high calorific power.When discharging fume higher (conventional boiler exhaust gas temperature is greatly about about 250 DEG C), water vapour can not cool condensation and release heat, wastes with fume emission, and is also wasted together containing a large amount of sensible heat in high-temperature flue gas, forms very large flue gas loss.Therefore conventional gas boiler (first generation) thermal efficiency calculates gained with low heat value, generally can only reach 88% ~ 92%.
According to the up-to-date state compulsion energy conservation criteria (requirement (controlling exhaust gas temperature≤170 DEG C) of TSGG0002-2010 " boiler energy-saving technical supervision rule of management ", now general employing installs energy-saving appliance additional at boiler smoke outlet place, utilize boiler feedwater cooled flue gas, exhaust gas temperature can be controlled in about 150 DEG C.Be called second generation gas fired-boiler, but also just absorb the sensible heat in part of smoke, the latent heat in water vapour fails to absorb.
The dew point of water vapour is at about 60 DEG C, and when flue-gas temperature is lower than 60 DEG C, the comprehensive condensation of the water vapour in flue gas, only has exhaust gas temperature to reach below this temperature and be just called full condensing boiler.
Conventional gas boiler thermal output is calculated as about 90% by fuel low heat valve.
Summary of the invention
The object of this invention is to provide a kind of full condensing boiler.
The technical solution adopted for the present invention to solve the technical problems is: boiler body connects cold and hot subregion water tank and outer circulation water route thereof, described cold and hot subregion water tank is divided into cold water area and hydrothermal area, described outer circulation water route comprises energy-saving appliance, condenser, circulating pump, feed pump, normal temperature demineralized water enters cold water area, condenser is entered by circulating pump, then get back to hydrothermal area, then enter energy-saving appliance through feed pump, exhaust gas temperature is reduced to greatest extent.The invention has the beneficial effects as follows, be provided with independent cold and hot subregion water tank, after energy-saving appliance connects self-contained water tank, no matter boiler is in operation whether moisturizing, has soft water at atmospheric circulating flowing recovery waste heat all the time and can store heat in energy-saving appliance; Eliminate interruption heat exchange that conventional energy-saving appliance exists, easily produce the potential safety hazards such as cavitation, boiling, bearing operation, solve the problems such as its interval recovery waste heat, efficiency are low; Soft water atmospheric circulating in condenser tube flows and heats, make its from normal temperature be increased to 40-90 DEG C enter oxygen-eliminating device or directly to boiler replenishing water, thermal de-aeration consume that steam accounts for total evaporation about 10%, greatly reduce deoxygenation after improving oxygen-eliminating device inflow temperature to use by oneself steam, improve boiler feed temperature, shorten big fire to burn pressure rising time, reduce Fuel Consumption.
Further, establish longitudinal baffle in described cold and hot subregion water tank, be cold water area, another side is hydrothermal area, and the bottom of cold water area and hydrothermal area communicates.The invention has the beneficial effects as follows, while meeting sectoring function needs, its partitioned organization is simple, easy to manufacture.
Further, described boiler body is horizontal two return structure, and the first backhaul comprises corrugated flue, and the second backhaul comprises threaded flue.The invention has the beneficial effects as follows, adopt two return structure, flue gas resistance reduces to about 60% of common three-pass boiler, and burner hearth back pressure and blower fan power consumption for reducing, configuring with combustor better and matching very much.Larger corrugated flue, more large-scale combustion space, increase radiation heating-surface, reduces furnace volume heat release rate and ignition temperature, is conducive to the formation of inner flue gas of the stove recirculation, effectively suppresses NO
xgeneration, environmental protection more, the harmful components in flue gas are dissolved in condensed water, effectively can reduce No
xdeng noxious gas emission.
Further, the heating surface of described energy-saving appliance, condenser adopts finned tube.The invention has the beneficial effects as follows, make full use of the latent heat that the physical sensible heat of smoke evacuation and water recovery discharge, the boiler thermal output being benchmark by fuel Lower heat value can reach more than 100%.Greatly reduce exhaust gas temperature, play the thermal efficiency improving whole boiler, fuel-saving effect.
Further, described energy-saving appliance, condenser are arranged in the top of boiler body.The invention has the beneficial effects as follows, it is rationally distributed, compact conformation.
Accompanying drawing explanation
Fig. 1 is cold and hot subregion water tank circulatory system schematic diagram.
Fig. 2 is normal temperature of the present invention feedwater embodiment system flow schematic diagram.
Fig. 3 is the present invention 105 DEG C feedwater embodiment system flow schematic diagram.
Detailed description of the invention
See Fig. 1 to Fig. 3, boiler body 70 of the present invention, by drum and annex thereof, each heating surface, header and contact pipeline thereof, boiler circuit pipeline and annex, combustion apparatus, smoke wind pipe, comprises the framework of platform, staircase, and furnace wall forms.
Described boiler body 70 connects cold and hot subregion water tank and outer circulation water route thereof, cold and hot subregion water tank is divided into cold water area 20 and hydrothermal area 30, outer circulation water route comprises energy-saving appliance 41, condenser 42, circulating pump 43, feed pump 44, normal temperature demineralized water enters cold water area 20, enters condenser 42 by circulating pump 43, then gets back to hydrothermal area 30, energy-saving appliance 41 is entered again through feed pump 44, afterwards, then enter boiler body 70, exhaust gas temperature is reduced to greatest extent.Hydrothermal area connects chemicals dosing plant 50, and normal-temperature water is softened through water treatment facilities 46, in Fig. 3, need set up deoxygenation case 45. during 105 degree of feedwater
Establish longitudinal baffle 10 in cold and hot subregion water tank, the left side is cold water area 20, and the right is hydrothermal area 30, and the bottom of cold water area 20 and hydrothermal area 30 communicates.
Boiler body 70 is horizontal two return structure, and the first backhaul comprises corrugated flue, and the second backhaul comprises threaded flue.
The heating surface of energy-saving appliance 41, condenser 42 adopts finned tube, is arranged in the top of boiler body 70.
After setting up this waste-heat recovery device of condenser, exhaust gas temperature can drop to 60 DEG C, and its thermal efficiency then can bring up to more than 98%.For 10t/h boiler, plain cylindrical furnace natural gas consumption is 785Nm
3(natural gas Lower heat value is 8500kcal/Nm to/h
3), condenser boiler natural gas consumption is 703 Nm
3/ h, if boiler operates 10 hours every day, saves energy natural gas every day: 820 Nm
3, save combustion gas expense every day: 820 Nm
3* 2.4 yuan/Nm
3=1968 yuan, within one month, save gas cost and take: 5.9 ten thousand yuan.Table one is the embodiment of the present invention and the comparative analysis of conventional boiler gas fired-boiler relevant parameters:
In table, " WNS " refers to the model code of boiler, and " Q " refers to that fuel is gaseous fuel, and " condensation " refers to the embodiment of the present invention, and " routine " refers to conventional gas boiler.
Fuel combustion can produce a large amount of CO
2, NO
xwith a small amount of SO
2, these mass emissions, to air, can cause the generation of greenhouse effects and acid rain, produce destruction to environment.Condenser boiler while water vapour, can remove these harmful substances in flue gas easily in condensation flue gas, therefore, adopts condenser boiler also to have great importance to protection of the environment.
By the network platform, remote monitoring is carried out to boiler operating parameter, according to customer charge changes in demand, flue gas oxygen content analysis, variation of ambient temperature, automatically regulating gas amount and air quantity, reach optimum economical operation.
The various parameter of automatic printing boiler operatiopn and the economic cost accounting analytical statement of boiler operatiopn.
For different management level, authorize authority at different levels, steam generator system is run and carries out remote monitoring.
Analyzed by flue gas oxygen content, adjusting air-fuel ratio, reduce excess air coefficient, reduce exhaust gas temperature; Meanwhile, rational excess air coefficient, can reduce NO
xgeneration.
For heating boiler, by the change of analysis environments temperature and indoor temperature, automatically regulate burner payload.
Full condensing boiler of the present invention, by optimizing the heating surface of boiler body, a large amount of absorption heat reduces exhaust gas temperature (about 250 DEG C), high-efficiency fin pipe energy-saving device (high temperature water-supply heater) is used to utilize boiler feedwater cooled flue gas to reduce exhaust gas temperature (about 150 DEG C) again, finally adopt corrosion-resistant high-efficiency fin pipework condensation heat exchanger (low temperature feedwater pre-heater), the boiler feedwater utilizing temperature lower again cooled flue gas reduces exhaust gas temperature (< 65 DEG C), water vapour in flue gas is condensed into water release latent heat, realize sensible heat and water recovery latent heat in flue gas to discharge simultaneously, low temperature make-up water in heat exchanger or heat medium water are entered boiler by heating, reach energy recovery, improve boiler efficiency.Adopt fuel low heat valve to calculate, efficiency can reach more than 100%; Adopt fuel high calorific power to calculate and reach more than 97%.
Contrast with traditional three backhaul gas fired-boilers:
1, cancel the threaded flue of boiler body the 3rd backhaul, for 8t/h gas-steam boiler, the threaded flue resistance of three backhauls accounts for about 40% of total cigarette air resistance, and its heat output (1310 KJ/Nm3) only accounts for 3.8% of total heat transfer; And the threaded flue heat output of two return (16684 KJ/Nm3) accounts for 48.5% of total heat transfer, an order of magnitude larger than the 3rd backhaul heat output.Therefore cancel the threaded flue of boiler body the 3rd backhaul, effectively can reduce flue gas resistance, thus reduce the power of combustor blast machine, reach the object of saving electric energy.
2, increase spiral fin coil energy-saving appliance, to absorb the sensible heat in flue gas, improve feed temperature, reduce exhaust gas temperature.
3, increase spiral fin coil condenser, to absorb the latent heat of vaporization discharged when water vapour undergoes phase transition in sensible heat in flue gas and flue gas, improve feed temperature, reduce exhaust gas temperature further.
4, increase cold and hot subregion water tank, utilize water density contrast at different temperatures, hot water and cold water go up lower leaf naturally; Water tank central dividing plate is utilized to realize the cold and hot subregion in left and right.Dividing plate lower end is not closed, to realize the natural flow of water.
Keep entering condenser with cold water all the time, the water of hydrothermal area enters energy-saving appliance.Improve condenser flue gas and WATER AS FLOW MEDIUM mean temperature difference, make it increase from the caloric receptivity flue gas, guarantee, under finned cooler cigarette temperature drop to water vapour dew point, to make water vapour be phase-changed into aqueous water, the release latent heat of vaporization.
Can find out from above comparative analysis: the condensing boiler thermal efficiency is high, have benefited from the reduction of flue gas loss and effectively utilize the latent heat of vaporization of water vapour in high-temperature flue gas.
Claims (5)
1. a full condensing boiler, it is characterized in that, boiler body connects cold and hot subregion water tank and outer circulation water route thereof, described cold and hot subregion water tank is divided into cold water area and hydrothermal area, described outer circulation water route comprises energy-saving appliance, condenser, circulating pump, feed pump, and normal temperature demineralized water enters cold water area, enters condenser by circulating pump, then get back to hydrothermal area, then enter energy-saving appliance through feed pump.
2. the full condensing boiler of one according to claim 1, is characterized in that, establish longitudinal baffle in described cold and hot subregion water tank, be cold water area, another side is hydrothermal area, and the bottom of cold water area and hydrothermal area communicates.
3. the full condensing boiler of one according to claim 1, is characterized in that, described boiler body is horizontal two return structure, and the first backhaul comprises corrugated flue, and the second backhaul comprises threaded flue.
4. the full condensing boiler of one according to claim 1, is characterized in that, the heating surface of described energy-saving appliance, condenser adopts finned tube.
5. the full condensing boiler of the one according to claim 1 or 4, is characterized in that, described energy-saving appliance, condenser are arranged in the top of boiler body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510463147.9A CN104990264A (en) | 2015-08-01 | 2015-08-01 | Full-condensation boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510463147.9A CN104990264A (en) | 2015-08-01 | 2015-08-01 | Full-condensation boiler |
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|---|---|
| CN104990264A true CN104990264A (en) | 2015-10-21 |
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|---|---|---|---|
| CN201510463147.9A Pending CN104990264A (en) | 2015-08-01 | 2015-08-01 | Full-condensation boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240827A (en) * | 2015-11-12 | 2016-01-13 | 上海揽鑫节能科技有限公司 | High-temperature deaeration and water supply boiler system |
| CN111981456A (en) * | 2020-08-11 | 2020-11-24 | 浙江特富发展股份有限公司 | Circulating system for supplying water to cold and hot layered boiler and operating method thereof |
| CN112032699A (en) * | 2020-09-23 | 2020-12-04 | 江苏双良锅炉有限公司 | Boiler system for cleaning and efficiently recycling heat energy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183009A (en) * | 2011-05-13 | 2011-09-14 | 江苏双良锅炉有限公司 | Water supply system of condensing steam boiler |
| CN102330966A (en) * | 2011-08-17 | 2012-01-25 | 安阳方快锅炉有限公司 | Energy-saving heat-supplying device of condensation steam boiler |
| CN203771380U (en) * | 2014-04-01 | 2014-08-13 | 北京科诺锅炉有限公司 | Condensation waste heat recovery steam boiler |
| CN204285434U (en) * | 2014-10-28 | 2015-04-22 | 浙江双峰锅炉制造有限公司 | Gas-steam boiler energy saver |
| CN204404209U (en) * | 2014-12-10 | 2015-06-17 | 湘潭锅炉有限责任公司 | A kind of energy-saving appliance with condensation water collection function |
-
2015
- 2015-08-01 CN CN201510463147.9A patent/CN104990264A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183009A (en) * | 2011-05-13 | 2011-09-14 | 江苏双良锅炉有限公司 | Water supply system of condensing steam boiler |
| CN102330966A (en) * | 2011-08-17 | 2012-01-25 | 安阳方快锅炉有限公司 | Energy-saving heat-supplying device of condensation steam boiler |
| CN203771380U (en) * | 2014-04-01 | 2014-08-13 | 北京科诺锅炉有限公司 | Condensation waste heat recovery steam boiler |
| CN204285434U (en) * | 2014-10-28 | 2015-04-22 | 浙江双峰锅炉制造有限公司 | Gas-steam boiler energy saver |
| CN204404209U (en) * | 2014-12-10 | 2015-06-17 | 湘潭锅炉有限责任公司 | A kind of energy-saving appliance with condensation water collection function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240827A (en) * | 2015-11-12 | 2016-01-13 | 上海揽鑫节能科技有限公司 | High-temperature deaeration and water supply boiler system |
| CN111981456A (en) * | 2020-08-11 | 2020-11-24 | 浙江特富发展股份有限公司 | Circulating system for supplying water to cold and hot layered boiler and operating method thereof |
| CN112032699A (en) * | 2020-09-23 | 2020-12-04 | 江苏双良锅炉有限公司 | Boiler system for cleaning and efficiently recycling heat energy |
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Application publication date: 20151021 |