CN102330966A - Energy-saving heat-supplying device of condensation steam boiler - Google Patents
Energy-saving heat-supplying device of condensation steam boiler Download PDFInfo
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- CN102330966A CN102330966A CN201110235239A CN201110235239A CN102330966A CN 102330966 A CN102330966 A CN 102330966A CN 201110235239 A CN201110235239 A CN 201110235239A CN 201110235239 A CN201110235239 A CN 201110235239A CN 102330966 A CN102330966 A CN 102330966A
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Abstract
The invention discloses an energy-saving heat-supplying device of a condensation steam boiler, belonging to the field of heating devices. The energy-saving heat-supplying device comprises a boiler body, an energy saver, a condenser, a combined insulation water tank and a PLC (programmable logical controller) system, wherein the combined insulation water tank comprises a cold water side and a hot water side, the condenser is respectively connected with the cold water side and the hot water side of the combined insulation water tank, the energy saver is respectively connected with the hot water side of the combined insulation water tank and a boiler barrel, and the PLC system is connected with a combustor, the cold water side and the hot water side of the combined insulation water tank, a frequency-conversion control water supply system, a water replenishing electromagnetic valve, a circulating water pump and a boiler tail oxygen content sensor. The invention has the beneficial effects of effectively obtaining low-temperature water of the steam boiler, being capable of obtaining about 30-40 percent of latent heat of vaporization of smoke, further reducing electricity consumption of the system by applying a PLC control and frequency-conversion control technology, and having comprehensive energy-saving effect.
Description
Technical field
The invention belongs to the heating equipment technical field.
Background technology
The a large amount of primary energy of urban heat supplying boiler consumption, the pollutant of amplification quantity side by side.The heating boiler of China is main with fire coal mainly traditionally.Along with the raising of urban life level,, use clean energy resource to become a kind of trend in order to improve urban air-quality.Traditional coal heating exhaust gas temperature is usually above 150 ℃, steam boiler even be higher than 200 ℃.Adopt after the natural gas, most of hot-water boiler exhaust gas temperatures are between 140～200 ℃.This has not only expended a large amount of energy, and has improved the operating cost of boiler.
With the natural gas is the boiler of fuel, and discharged flue gas contains about 15%～19% (the volume composition) of steam, is the main carrier of flue gas heat.Can know that according to the steam partial pressure coefficient water dew point is generally at 56～60 ℃ in the flue gas.We reclaim the sensible heat and the latent heat of flue gas simultaneously through reducing flue-gas temperature to dew point with refrigerant medium (like cold water, cold air etc.).For the steam boiler exhaust gas temperature is reduced to flue gas dew point once, just needing more, the water of low temperature cools off flue gas.General way is at the plain cylindrical furnace exhanst gas outlet energy-saving appliance to be installed; Through energy-saving appliance exhaust gas temperature is lowered, heating boiler feedwater simultaneously is because common steam boiler exhaust gas temperature is all about 230～250 ℃; Boiler feedwater through flue gas heating rises to 70～80 ℃ from room temperature (20 ℃); Steam in the flue gas has only seldom or condensation does not take place at this moment, and condenser boiler efficient improves very limited, and the efficient of boiler is lower than 96%.
Summary of the invention
The object of the invention is not only the acquisition that more effectively solves the steam boiler water at low temperature; Obtain about 30～40% the latent heat of vaporization of flue gas; And the application through PLC control and frequency conversion control technique, further reduce the power consumption of system, make it have the synthesis energy saving effect.
Technical scheme of the present invention is:
The present invention is made up of boiler body, energy-saving appliance, condenser, combined thermal water tank and PLC control system; Wherein combined thermal water tank is made up of cold water side and hot water side; Condenser links to each other with hot water side with the cold water side of combined thermal water tank respectively; Energy-saving appliance links to each other with drum with the hot water side of combined thermal water tank respectively; Be provided with level sensor in the boiler and be connected to PLC control system, PLC control system also connects cold water side and hot water side, VFC water supply system, moisturizing magnetic valve, water circulating pump and the boiler tail oxygen level sensor of burner, combined thermal water tank simultaneously;
Equipment Control step of the present invention comprises:
1, when the exhaust gas temperature before the energy-saving appliance is 250 ℃ of left and right sides, control to 150～160 ℃ through exhaust gas temperature behind the energy-saving appliance, boiler feedwater rises to more than 90 ℃ from 60 ℃;
2, the water circulating pump of condenser and the boiler-burner control that links when burner is not worked, is in halted state;
3, the boiler body water level is carried out continuous monitoring, the boiler feed pump in the PLC control system control VFC water supply system carries out continuous water feeding control;
4, the water circulating pump of condenser extracts the water cooled condenser of composite thermal insulation water tank cold water side, and the water after the absorption heat gets into the hot water side of composite thermal insulation water tank;
5, condenser moves under minute-pressure or atmospheric pressure state;
6, the boiler tail oxygen level sensor is monitored the content of the imperfect combustion oxygen of smoke evacuation place at any time, and regulates the blower fan frequency according to oxygen content through the mode of frequency conversion, reaches the rational Match of fuel quantity and air quantity.
Beneficial effect of the present invention: the present invention has not only solved the acquisition of steam boiler water at low temperature effectively; Can obtain about 30～40% the latent heat of vaporization of flue gas; And the application through PLC control and frequency conversion control technique; Further reduced the power consumption of system, had comprehensive energy-saving effect, the efficient of calculating boiler according to low heat valve can reach 100%～104%.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
The specific embodiment
Working medium flow process of the present invention and flue gas flow explanation:
The working medium flow process:
1, the water circulating pump in the VFC water supply system 12 is from the hot water side 7 extracting high-temperature hot water of combined thermal water tank 6; After getting into finned tube and carry out heat exchange by energy-saving appliance 2 tops with the hot flue gas that comes out by convection bank; Flow out by energy-saving appliance 2 bottoms, carry out subsequently in the stove tube of boiler body 1.
2, softened water tank of the present invention is a combined thermal water tank 6; Form by cold water side 8 and hot water side 7; Treated soft water covers cold water side 8, and the water circulating pump 10 of condenser 3 extracts the water cooled condenser 3 of cold water side 8, and the water after the absorption heat gets into the hot water side 7 of combined thermal water tank 6; The water that can guarantee to supply with all the time condenser 3 like this is water at low temperature; After carrying out heat exchange with hot flue gas, come out to get back to the high temperature side 7 of combined thermal water tank 6, accomplished the heat exchange of tail flue gas condenser by condenser 3 front ends.In order to guarantee combined thermal water tank 6 water levels in the reasonable scope, be provided with level sensor 4 in the boiler, system 11 controls by PLC control.
Flue gas flow:
Fuel is lighted by the burner that is installed in the burner hearth front end 5; Fully the hot flue gas of burning back formation gets into energy-saving appliance 2 through the chamber of strile-bacing that is located at burner hearth bottom in burner hearth; And the spiral fin coil in energy-saving appliance 2 upwards flows; Turning back along the flue on energy-saving appliance 2 tops gets into condenser 3, and the spiral fin coils in the condenser 3 flow backward then, finally get into chimney and enter atmosphere.
Because boiler body 1 exit gas temperature is higher; Be about 250～290 ℃, flue gas gets into energy-saving appliance 2 and comes water to carry out heat exchange with hot water side 7 from combined thermal water tank 6, and the high-temperature water temperature that gets into energy-saving appliance 2 is 55～65 ℃; Energy-saving appliance 2 outlet water temperatures are about 85～100 ℃; Energy-saving appliance 2 outlet cigarette temperature are 150～170 ℃, and high-temperature flue gas and water are reverse flow in energy-saving appliance 2, thereby can obtain higher heat transfer temperature and pressure; Mean temperature difference is about 125～160 ℃, thereby can obtain higher heat exchange efficiency.
Claims (2)
1. condensing type steam boiler energy-saving heating equipment; Form by boiler body (1), energy-saving appliance (2), condenser (3), combined thermal water tank (6) and PLC control system (11); It is characterized in that: wherein combined thermal water tank (6) is made up of cold water side (8) and hot water side (7); Condenser (3) links to each other with hot water side (7) with the cold water side (8) of combined thermal water tank (6) respectively; Energy-saving appliance (2) links to each other with drum with the hot water side (7) of combined thermal water tank (6) respectively; Be provided with level sensor (4) in the boiler and be connected to PLC control system (11), PLC control system (11) also connects cold water side (8) and hot water side (7), VFC water supply system (12), moisturizing magnetic valve (9), water circulating pump (10) and the boiler tail oxygen level sensor of burner (5), combined thermal water tank (6) simultaneously.
2. a condensing type steam boiler energy-saving heating equipment is characterized in that, comprises following Equipment Control step:
, when the preceding exhaust gas temperature of energy-saving appliance (2) is 250 ℃ of left and right sides, control to 150～160 ℃ through exhaust gas temperature behind the energy-saving appliance, boiler feedwater rises to more than 90 ℃ from 60 ℃;
⑵ the control that links of the water circulating pump of, condenser (3) and boiler-burner (5) when burner (5) when not working, is in halted state;
⑶, the boiler body water level is carried out continuous monitoring, the boiler feed pump in PLC control system (11) the control VFC water supply system carries out continuous water feeding control;
⑷ the water circulating pump of, condenser (3) extracts the water cooled condenser of composite thermal insulation water tank cold water side (8), and the water after the absorption heat gets into the hot water side (7) of composite thermal insulation water tank;
⑸, condenser (3) move under minute-pressure or atmospheric pressure state;
⑹, boiler tail oxygen level sensor are monitored the content of the imperfect combustion oxygen of smoke evacuation place at any time, and regulate the blower fan frequency according to oxygen content through the mode of frequency conversion, reach the rational Match of fuel quantity and air quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110235239 CN102330966B (en) | 2011-08-17 | 2011-08-17 | Energy-saving heat-supplying device of condensation steam boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110235239 CN102330966B (en) | 2011-08-17 | 2011-08-17 | Energy-saving heat-supplying device of condensation steam boiler |
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| CN102330966A true CN102330966A (en) | 2012-01-25 |
| CN102330966B CN102330966B (en) | 2013-07-17 |
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| CN 201110235239 Active CN102330966B (en) | 2011-08-17 | 2011-08-17 | Energy-saving heat-supplying device of condensation steam boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635847A (en) * | 2012-04-26 | 2012-08-15 | 浙江中烟工业有限责任公司 | Water feeding system for multiple condensing boilers |
| CN103629812A (en) * | 2013-11-14 | 2014-03-12 | 颍上县经纬循环农业有限公司 | Air heating device of flourmill |
| CN104990264A (en) * | 2015-08-01 | 2015-10-21 | 湘潭锅炉有限责任公司 | Full-condensation boiler |
| CN110906312A (en) * | 2019-12-05 | 2020-03-24 | 徐州工业锅炉有限公司 | Condensing boiler drum liquid level control system with energy-saving technology |
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| CN2791495Y (en) * | 2004-12-27 | 2006-06-28 | 李树生 | Boiler chimney residual heat recovery device |
| CN101644426A (en) * | 2009-08-30 | 2010-02-10 | 丰原宿州生物化工有限公司 | Afterheat utilization method of reaction effluent in ethane production |
| CN101936520A (en) * | 2010-08-16 | 2011-01-05 | 江苏双良锅炉有限公司 | Horizontal type oil-gas condensing steam boiler with energy saver and condenser arranged outside independently |
| CN101986025A (en) * | 2010-10-25 | 2011-03-16 | 广东慧生能源技术有限公司 | Integrated low-carbon micro-discharge energy-saving and emission-reduction boiler system |
| CN102269401A (en) * | 2010-06-07 | 2011-12-07 | 洛阳蓝海实业有限公司 | Low-temperature flue gas waste heat recovery utilization method |
| CN202229164U (en) * | 2011-08-17 | 2012-05-23 | 安阳方快锅炉有限公司 | Condensing type steam boiler energy-saving heating device |
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2011
- 2011-08-17 CN CN 201110235239 patent/CN102330966B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2791495Y (en) * | 2004-12-27 | 2006-06-28 | 李树生 | Boiler chimney residual heat recovery device |
| CN101644426A (en) * | 2009-08-30 | 2010-02-10 | 丰原宿州生物化工有限公司 | Afterheat utilization method of reaction effluent in ethane production |
| CN102269401A (en) * | 2010-06-07 | 2011-12-07 | 洛阳蓝海实业有限公司 | Low-temperature flue gas waste heat recovery utilization method |
| CN101936520A (en) * | 2010-08-16 | 2011-01-05 | 江苏双良锅炉有限公司 | Horizontal type oil-gas condensing steam boiler with energy saver and condenser arranged outside independently |
| CN101986025A (en) * | 2010-10-25 | 2011-03-16 | 广东慧生能源技术有限公司 | Integrated low-carbon micro-discharge energy-saving and emission-reduction boiler system |
| CN202229164U (en) * | 2011-08-17 | 2012-05-23 | 安阳方快锅炉有限公司 | Condensing type steam boiler energy-saving heating device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635847A (en) * | 2012-04-26 | 2012-08-15 | 浙江中烟工业有限责任公司 | Water feeding system for multiple condensing boilers |
| CN102635847B (en) * | 2012-04-26 | 2014-03-26 | 浙江中烟工业有限责任公司 | Water feeding system for multiple condensing boilers |
| CN103629812A (en) * | 2013-11-14 | 2014-03-12 | 颍上县经纬循环农业有限公司 | Air heating device of flourmill |
| CN104990264A (en) * | 2015-08-01 | 2015-10-21 | 湘潭锅炉有限责任公司 | Full-condensation boiler |
| CN110906312A (en) * | 2019-12-05 | 2020-03-24 | 徐州工业锅炉有限公司 | Condensing boiler drum liquid level control system with energy-saving technology |
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| Publication number | Publication date |
|---|---|
| CN102330966B (en) | 2013-07-17 |
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Address after: 455000 Haihe Road, Anyang Development Zone, Henan Patentee after: FangKuai Boiler Co., Ltd. Address before: 455000 Haihe Road, Anyang Development Zone, Henan Patentee before: Anyang Fangkuai Boiler Co., Ltd. |