CN105066093A - Gas-fire boiler - Google Patents
Gas-fire boiler Download PDFInfo
- Publication number
- CN105066093A CN105066093A CN201510561079.XA CN201510561079A CN105066093A CN 105066093 A CN105066093 A CN 105066093A CN 201510561079 A CN201510561079 A CN 201510561079A CN 105066093 A CN105066093 A CN 105066093A
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- Prior art keywords
- demineralized
- gas
- boiler
- water
- water preheater
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000003546 flue gas Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 10
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000003245 coal Substances 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The invention discloses a gas-fired boiler. The gas-fired boiler solves the problems that an existing gas-fired boiler is high in energy consumption, low in heat recovery efficiency and low in investment cost and operation cost. According to the technical scheme, the gas-fired boiler comprises a boiler body with a steam pocket, and an boiler body outlet is sequentially connected with a superheater, a coal economizer, an induced draft fan and a chimney; a boiler inlet is connected with an air feeder, the coal economizer is connected with the induced draft fan through a demineralized-water preheater, and a demineralized-water outlet of the demineralized-water preheater is connected with the steam packet through a deaerator. The gas-fired boiler is simple in structure, high in heat utilization rate and low in investment and operation cost.
Description
Technical field
The present invention relates to a kind of gas fired-boiler.
Background technology
Boiler refers to and utilizes various fuel, electricity or other energy, by the heating liquid of institute's splendid attire to certain parameter, and externally exports the equipment of heat energy.Gas fired-boiler, with the characteristic of its clean energy resource, under the ever-increasing situation of society environmental protection pressure, is more widely used.
The big-and-middle-sized gas boiler of tradition, substantially similar on system flow: cold air is sent into air preheater by pressure fan, after flue gas heat exchange, enter burner and combustion gas mixing burning, the flue gas that burning produces, after superheater, economizer, air preheater heat exchange, enters chimney through air-introduced machine (positive draft boiler without).Therefore, the boiler of identical steam production, in investment and operating cost, nothing too big difference.Therefore, it is low to develop a kind of initial outlay, and the gas boiler of economical operation is necessary.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, providing that a kind of structure is simple, heat utilization rate is high, cost of investment and the low gas fired-boiler of operating cost.
Technical scheme comprises the body of heater being provided with drum, body of heater outlet connects superheater, economizer, air-introduced machine and chimney successively, described body of heater import is connected with pressure fan, described economizer is connected with air-introduced machine through demineralized-water preheater, and the demineralized water outlet of described demineralized-water preheater is connected with drum through oxygen-eliminating device.
The exhanst gas outlet pipeline of described demineralized-water preheater is provided with flue-gas temperature signal transducer, the demineralized water inlet pipeline of described demineralized-water preheater is provided with first flow control valve, and the controller of described first flow control valve is connected with described flue-gas temperature signal transducer.
Also bypass duct is connected with between the demineralized water import of described demineralized-water preheater and oxygen-eliminating device import.
Described oxygen-eliminating device is provided with liquid level sensor, and described bypass duct is provided with second adjustable valve, and the controller of described second adjustable valve is connected with described liquid level sensor.
Beneficial effect:
(1) do not establish air preheater, decrease body steel construction load, pressure fan can burner arrangement more in body of heater, shortens air channel length, also reduces pressure fan pressure head greatly;
(2) demineralized-water preheater is set simultaneously, the flue gas that body of heater is discharged is discharged after demineralized-water preheater and demineralized water heat exchange again, and heat exchange efficiency is high, and energy recovery is effective, exhaust gas temperature, far below the conventional boiler being provided with air preheater in the past, can reduce exhaust gas temperature about 60 ~ 70 DEG C; And demineralized water is after demineralized-water preheater preheating, the front temperature entering bubble bag is higher, thus effectively reduces the energy consumption of producing required for water vapour, saves energy and reduce the cost further.
(3) obtained out the flue-gas temperature of demineralized-water preheater by flue-gas temperature signal transducer, to control the flow of the demineralized water entering demineralized-water preheater, ensure effective recovery of heat energy; Obtain liquid level in oxygen-eliminating device by liquid level sensor, to control the flow being entered demineralized water in oxygen-eliminating device by bypass duct, in claimed range, control automatically simple to make Liquid level in oxygen-eliminating device.
(4) to have initial outlay low in the present invention, and economical operation, the advantage of efficient energy-saving, has good application prospect.For a 150t/h gas fired-boiler, saving air channel steel and steel construction steel are about 40t, and the cost arranging demineralized-water preheater and air preheater is suitable, but due to demineralized water initial temperature low, making exit gas temperature lower than conventional boiler, is 15.6 × 10 according to exhaust gas volumn
4nm
3/ h calculates, and the energy reclaimed is 4290kW more; Owing to not establishing air preheater, pressure head needed for pressure fan is by minimizing ~ 1600Pa, and therefore pressure fan power is by minimizing ~ 80kw.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, 1-pressure fan; 2-body of heater; 3-superheater; 4-economizer, 5-demineralized-water preheater; 6-bypass duct; 7-flue-gas temperature signal transducer; 8-air-introduced machine; 9-chimney; 10-oxygen-eliminating device; 11-boiler feed pump; 12-liquid level sensor, 13-drum, 14-first flow control valve, 15-second adjustable valve.
Detailed description of the invention
With reference to Fig. 1, the present invention includes the body of heater 2 being provided with drum 13, body of heater 2 exports pipe side or shell-side, air-introduced machine 8 and the chimney 9 of connection superheater 3, economizer 4, demineralized-water preheater 5 successively, the import of described body of heater 2 is connected with pressure fan 1, described economizer 4 is through being connected with air-introduced machine, the demineralized water import of described demineralized-water preheater shell-side or pipe side can pass into demineralized water, and demineralized water outlet is connected with drum through oxygen-eliminating device, boiler feed pump 11.
The exhanst gas outlet pipeline of described demineralized-water preheater 5 is provided with flue-gas temperature signal transducer 7, the demineralized water inlet pipeline of described demineralized-water preheater 5 is provided with first flow control valve 14, and the controller of described first flow control valve 14 is connected with described flue-gas temperature signal transducer 7; Bypass duct 6 is also connected with between the demineralized water import of described demineralized-water preheater 5 and oxygen-eliminating device 10 import.Described oxygen-eliminating device 10 is provided with liquid level sensor 12, and described bypass duct 6 is provided with second adjustable valve 15, and the controller of described second adjustable valve 15 is connected with described liquid level sensor 12.
Operation principle:
Body of heater 2 does not establish air preheater, wind is sent in the burner in body of heater 2 combustion-supporting as required air by pressure fan 1, the flue gas that burning produces is through superheater 3, 225 DEG C are down to after economizer 4 heat exchange, then the shell-side and the pipe side demineralized water that enter demineralized-water preheater 5 carry out indirect heat exchange, described demineralized-water preheater 5 is shell-and-tube heat exchanger, demineralized water is distributed in pipe side, flue gas after heat exchange is cooled to 80 DEG C further and then sends into chimney 9 through air-introduced machine 8 and discharge, for avoiding flue-gas temperature too low, corrosion is caused to flue, the flue gas exit temperature of described demineralized-water preheater 5 should be controlled higher than dew-point temperature, be preferably higher than dew-point temperature 10 DEG C as well.Demineralized water is divided into two parts, a part enters after demineralized-water preheater 5 is warming up to 75 DEG C with flue gas heat exchange through first flow control valve 14 and sends into oxygen-eliminating device 10 again, another part then directly sends into oxygen-eliminating device 10 deoxygenation as required, and the demineralized water going out oxygen-eliminating device 10 sends into heating generating steam in drum.Enter a part of demineralized water flow of demineralized-water preheater 5, can regulate according to the flue-gas temperature signal transducer 7 that the exhanst gas outlet pipeline of demineralized-water preheater 5 is arranged, when flue-gas temperature is too high, first flow control valve 14 can be controlled and strengthen the demineralized water flow entering demineralized-water preheater 5, otherwise then reduce flow; The flow entering another part demineralized water of bypass duct 6 can regulate according to the liquid level sensor 12 on oxygen-eliminating device 10, when described oxygen-eliminating device 10 liquid level is higher, the second adjustable valve 15 on bypass duct 6 can be controlled, reduce or close the demineralized water flow entered by bypass duct 6 in oxygen-eliminating device 10, on the contrary then augmented flow.
Claims (4)
1. a gas fired-boiler, comprise the body of heater being provided with drum, body of heater outlet connects superheater, economizer, air-introduced machine and chimney successively, it is characterized in that, described body of heater import is connected with pressure fan, described economizer is connected with air-introduced machine through demineralized-water preheater, and the demineralized water outlet of described demineralized-water preheater is connected with drum through oxygen-eliminating device.
2. gas fired-boiler as claimed in claim 1, it is characterized in that, the exhanst gas outlet pipeline of described demineralized-water preheater is provided with flue-gas temperature signal transducer, the demineralized water inlet pipeline of described demineralized-water preheater is provided with first flow control valve, and the controller of described first flow control valve is connected with described flue-gas temperature signal transducer.
3. gas fired-boiler as claimed in claim 1 or 2, is characterized in that, be also connected with bypass duct between the demineralized water import of described demineralized-water preheater and oxygen-eliminating device import.
4. the gas fired-boiler described in as claimed in claim 31 or 2, is characterized in that, described oxygen-eliminating device is provided with liquid level sensor, and described bypass duct is provided with second adjustable valve, and the controller of described second adjustable valve is connected with described liquid level sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510561079.XA CN105066093A (en) | 2015-09-06 | 2015-09-06 | Gas-fire boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510561079.XA CN105066093A (en) | 2015-09-06 | 2015-09-06 | Gas-fire boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105066093A true CN105066093A (en) | 2015-11-18 |
Family
ID=54495530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510561079.XA Pending CN105066093A (en) | 2015-09-06 | 2015-09-06 | Gas-fire boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN105066093A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271703A (en) * | 2020-03-19 | 2020-06-12 | 台州市德长环保有限公司 | Heating and oxygen removing device and method for waste heat boiler of non-power generation solid waste incineration system |
| CN112984486A (en) * | 2021-02-26 | 2021-06-18 | 西安西热锅炉环保工程有限公司 | Energy-saving and emission-reducing system and method for small and medium-sized natural gas boilers |
| CN114543067A (en) * | 2022-02-24 | 2022-05-27 | 东莞顺裕纸业有限公司 | Coal-to-gas station with improved air flow passage and improved heat energy utilization rate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4592293A (en) * | 1983-11-14 | 1986-06-03 | Hitachi, Ltd. | Method of controlling an air heater of a coal-fired boiler |
| CN102563610A (en) * | 2011-10-24 | 2012-07-11 | 上海上电电力工程有限公司 | Energy saving system for boiler |
| CN102734787A (en) * | 2012-07-06 | 2012-10-17 | 上海伏波环保设备有限公司 | Concurrent recycling system for boiler smoke afterheat |
| CN104832904A (en) * | 2015-05-13 | 2015-08-12 | 湖南中冶长天节能环保技术有限公司 | Gas boiler for heating saturated steam and superheated steam achieving method |
| CN104848197A (en) * | 2015-03-31 | 2015-08-19 | 浙江华德利纺织印染有限公司 | Device for recycling boiler tail smoke heat |
| CN205048411U (en) * | 2015-09-06 | 2016-02-24 | 中国五环工程有限公司 | Gas boiler |
-
2015
- 2015-09-06 CN CN201510561079.XA patent/CN105066093A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4592293A (en) * | 1983-11-14 | 1986-06-03 | Hitachi, Ltd. | Method of controlling an air heater of a coal-fired boiler |
| CN102563610A (en) * | 2011-10-24 | 2012-07-11 | 上海上电电力工程有限公司 | Energy saving system for boiler |
| CN102734787A (en) * | 2012-07-06 | 2012-10-17 | 上海伏波环保设备有限公司 | Concurrent recycling system for boiler smoke afterheat |
| CN104848197A (en) * | 2015-03-31 | 2015-08-19 | 浙江华德利纺织印染有限公司 | Device for recycling boiler tail smoke heat |
| CN104832904A (en) * | 2015-05-13 | 2015-08-12 | 湖南中冶长天节能环保技术有限公司 | Gas boiler for heating saturated steam and superheated steam achieving method |
| CN205048411U (en) * | 2015-09-06 | 2016-02-24 | 中国五环工程有限公司 | Gas boiler |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271703A (en) * | 2020-03-19 | 2020-06-12 | 台州市德长环保有限公司 | Heating and oxygen removing device and method for waste heat boiler of non-power generation solid waste incineration system |
| CN112984486A (en) * | 2021-02-26 | 2021-06-18 | 西安西热锅炉环保工程有限公司 | Energy-saving and emission-reducing system and method for small and medium-sized natural gas boilers |
| CN114543067A (en) * | 2022-02-24 | 2022-05-27 | 东莞顺裕纸业有限公司 | Coal-to-gas station with improved air flow passage and improved heat energy utilization rate |
| CN114543067B (en) * | 2022-02-24 | 2024-03-22 | 东莞顺裕纸业有限公司 | Coal gas station with improved air flow passage and improved heat energy utilization rate |
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Application publication date: 20151118 |