CN104501397A - Membrane water-wall compound return water condensing type natural gas hot water boiler - Google Patents

Membrane water-wall compound return water condensing type natural gas hot water boiler Download PDF

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Publication number
CN104501397A
CN104501397A CN201410684110.4A CN201410684110A CN104501397A CN 104501397 A CN104501397 A CN 104501397A CN 201410684110 A CN201410684110 A CN 201410684110A CN 104501397 A CN104501397 A CN 104501397A
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China
Prior art keywords
water
pipe
header
panel casing
fin panel
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Application number
CN201410684110.4A
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Chinese (zh)
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CN104501397B (en
Inventor
李学林
陈霞
戚仲凯
谢传玉
王思远
程言龙
齐安庆
朱春凤
鲁金灿
赵红利
李晶
范道平
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JIANGSU SIFANG BOILER CO Ltd
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JIANGSU SIFANG BOILER CO Ltd
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Priority to CN201410684110.4A priority Critical patent/CN104501397B/en
Publication of CN104501397A publication Critical patent/CN104501397A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

Disclosed is a membrane water-wall compound return water condensing type natural gas hot water boiler. The natural gas hot water boiler is characterized in that a gas collector is connected with a primary pipe network water supply pipe (21) in pipelines; return water of a primary pipe network return water pipe (20) in the pipelines sequentially passes a lower water header, a lower header, a first heat exchanging pipe, an upper header and an upper water header of an economizer and a rear-membrane type water wall, a mid-partition membrane type water wall, a left-membrane type water wall, a front-membrane type water wall and a convection bank of a hearth (5) to be finally converged in an upper boiler barrel; the pipelines further include a secondary network water return pipe (22) and a secondary pipe network water supply pipe (23), and return water of the secondary pipe network return water pipe sequentially passes a branched water header (31), a second heat exchanging pipe (32) and a water header (33) of a condenser; one end of the water header is connected with the secondary pipe network water supply pipe while the other end is plugged. The membrane water-wall compound return water condensing type natural gas hot water boiler has certain universality, heat utilization rate of the boiler is increased, fuel cost during operation is lowered, and service life of boiler equipment is prolonged.

Description

A kind of fin panel casing compound backwater condensing natural gas hot water boiler
Technical field
The present invention relates to a kind of natural gas hot water's boiler, specifically a kind of fin panel casing compound backwater condensing natural gas hot water boiler, belongs to boiler heat degree of depth recovery technology field.
Background technology
Heating in winter boiler adopts coal-fired hot-water boiler usually, but because the steaming ton of coal-fired hot-water boiler is less, boiler pollutant discharge is difficult to up to standard, in addition heating boiler is generally all built in city or peri-urban, larger to the healthy threat in civic, a large amount of coal-fired hot-water boiler adopts natural gas boiler to replace, to alleviate coal-burning stove for heating pollution on the environment now.
Conventional natural gas boiler adopts the backwater of a pipe network and flue gas adverse current heat exchange, a pipe network return water temperature to be not less than 70 DEG C, natural gas boiler exhaust gas temperature needs higher than return water temperature at least 10 ~ 20 DEG C, because natural gas boiler smoke discharging temperature is higher, cause the thermal efficiency lower; In addition, have an appointment after combustion of natural gas 18% steam in flue gas with gaseous form discharge, adopt pipe network backwater can not the latent heat of vaporization of water vapour in recovered flue gas completely, the latent heat of vaporization of water vapour runs off along with flue gas, causes energy waste; In addition during natural gas hot water's boiler winter heating, boiler is for a long time lower than rated load operation, and back-end surfaces also exists the problem of cold end corrosion.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of fin panel casing compound backwater condensing natural gas hot water boiler, there is certain versatility, improve the heat utilization ratio of boiler, reduce fuel cost when running, the service life of prolonged boiler equipment.
To achieve these goals, the technical solution used in the present invention is: a kind of fin panel casing compound backwater condensing natural gas hot water boiler, comprise upper drum, lower drum, burner hearth, turning flue, energy-saving appliance, condenser, convection bank and pipeline, by the left-to-right body water inlet adapter being provided with safety valve, air collector, pipeline successively on upper drum, air collector is connected with a pipe network water supply pipe of pipeline; The backwater of a pipe network return pipe of pipeline successively through header of catchmenting under energy-saving appliance, lower header, heat exchanger tube I, upper collecting chamber, on to catchment fin panel casing after header, burner hearth, mid-board fin panel casing, left fin panel casing, prepattern water-cooling wall, convection bank, be finally communicated with upper drum; The upper end of convection bank is connected with upper drum, lower end is connected with lower drum, and one end of turning flue is connected with convection bank, and the other end is connected with the gas approach of energy-saving appliance, the exhanst gas outlet of energy-saving appliance is connected with the gas approach of condenser, and the exhanst gas outlet of condenser connects chimney; Sidewall is surrounded by four block plates be attached to outside upper collecting chamber, lower header, heat exchanger tube I; One end of sidewall is connected with turning flue, and the other end is connected with the side plate of condenser.
Described pipeline also comprises secondary pipe network return pipe, secondary pipe network feed pipe, and the backwater of secondary pipe network return pipe is successively through point water header, heat exchanger tube II, the header of catchmenting of condenser; The one end of header of catchmenting is connected with secondary pipe network feed pipe, other end shutoff.
Rear fin panel casing, mid-board fin panel casing, left fin panel casing, prepattern water-cooling wall to weld with band steel by pipe and form, and lay heat-preservation cotton outside fin panel casing.
Heat exchanger tube I and heat exchanger tube II are spiral fin coil.
The material of the heat exchanger tube I of energy-saving appliance, heat exchanger tube II, side plate is ND steel, examines and step on steel or austenitic stainless steel.
Convection bank is made up of at least one light pipe, and the arrangement mode of Guan Zuzhong pipe adopts along row.
Turning flue is the frame structure being surrounded a hollow by four block plates, and floor projection is the elbow of 90 °.
Left fin panel casing is provided with peephole; Above the burner hearth of left fin panel casing, near furnace outlet position, explosion proof door is installed.
The platform of maintenance is set below burner.
The present invention is by employing pipe network return pipe and secondary pipe network return pipe compound backwater classification cooled flue gas, the return water temperature of a pipe network return pipe is not less than 70 DEG C, the return water temperature of secondary pipe network return pipe is between 40 ~ 50 DEG C, the backwater of a pipe network return pipe enters energy-saving appliance and flue gas adverse current heat exchange, flue gas is made to be cooled to 80 ~ 120 DEG C, the backwater of secondary pipe network return pipe enter condenser again with flue gas adverse current heat exchange, flue gas is made to be cooled to 45 ~ 55 DEG C, in flue gas, the dew point of water vapour is 60 DEG C, water vapour in flue gas has 30 ~ 70% to be condensed into aqueous water, therefore the water vapour in flue gas discharges a large amount of latent heats of vaporization, often steam ton boiler and save 6 ~ 15Nm than conventional natural gas boiler 3natural gas, improves the thermal efficiency of boiler, reduces fuel cost during operation, burner hearth adopts film water cold wall structure, and can adopt heat-preservation cotton during insulation, heat insulation work amount is little, and foundation bearing is little, and can realize malleation overheavy firing in stove, system only configures air blast, does not configure air-introduced machine, reduces power consumption and initial investment cost, heating surface and the flue wall temperature of energy-saving appliance and condenser and smoke contacts are in below flue gas dew point temperature for a long time, adopt ND steel, examine and step on steel or austenitic stainless steel, effectively can alleviate cold end corrosion, extend this low temperature and are heated service life of equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the B-B sectional view of Fig. 1.
In figure: 1, front lower header, 2, lower drum, 3, burner, 4, platform, 5, burner hearth, 6, prepattern water-cooling wall, 7, front upper collecting chamber, 8, upper drum, 9, safety valve, 10, air collector, 11, body water inlet adapter, 12, rear upper collecting chamber, 13, rear fin panel casing, 14, peephole, 15, rear lower header, 16, turning flue, 17, energy-saving appliance, 18, condenser, 19, explosion proof door, 20, a pipe network return pipe, 21, a pipe network water supply pipe, 22, secondary pipe network return pipe, 23, secondary pipe network feed pipe, 24, on to catchment header, 25, upper collecting chamber, 26, heat exchanger tube I, 27, lower header, 28, under to catchment header, 29, support I, 30, sidewall, 31, divide water header, 32, heat exchanger tube II, 33, header of catchmenting, 34, support II, 35, side plate, 36, left fin panel casing, 37, mid-board fin panel casing, 38, convection bank.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figures 1 to 4, this fin panel casing compound backwater condensing natural gas hot water boiler, comprise upper drum 8, lower drum 2, burner hearth 5, turning flue 16, energy-saving appliance 17, condenser 18, convection bank 38 and pipeline, upper drum 8 is provided with safety valve 9, air collector 10, ducted body water inlet adapter 11 successively by left-to-right, and air collector 10 is connected with a ducted pipe network water supply pipe 21; The backwater of a ducted pipe network return pipe 20 successively through energy-saving appliance 17 times headers 28 of catchmenting, lower header 27, heat exchanger tube I 26, upper collecting chamber 25, on to catchment fin panel casing 13 after header 24, burner hearth 5, mid-board fin panel casing 37, left fin panel casing 36, prepattern water-cooling wall 6, convection bank 38, be finally communicated with upper drum 8; The upper end of convection bank 38 is connected with upper drum 8, and lower end is connected with lower drum 2; One end of turning flue 16 is connected with convection bank 38, and the other end is connected with the gas approach of energy-saving appliance 17, and the exhanst gas outlet of energy-saving appliance 17 is connected with the gas approach of condenser 18, and the exhanst gas outlet of condenser 18 connects chimney; Sidewall 30 is surrounded by four block plates be attached to outside upper collecting chamber 25, lower header 27, heat exchanger tube I 26; One end of sidewall 30 is connected with turning flue 16, and the other end is connected with the side plate 35 of condenser 18; The front upper collecting chamber 7 of burner hearth 5, one end of rear upper collecting chamber 12 are connected with upper drum 8 respectively, other end shutoff; Front lower header 1 is connected with lower drum 2 respectively with one end of rear lower header 15, other end shutoff; The upper end of prepattern water-cooling wall 6 is connected with front upper collecting chamber 7, and lower end is connected with front lower header 1; Prepattern water-cooling wall 6 is provided with burner 3; The upper end of left fin panel casing 36 is connected with upper drum 8, and lower end is connected with lower drum 2; The upper end of rear fin panel casing 13 is connected with rear upper collecting chamber 12, and lower end is connected with rear lower header 15; Convection bank 38 is made up of light pipe, and the upper end of every root pipe is connected with upper drum 8, and lower end is connected with lower drum 2; The adapter 11 of intaking of one end and the body of header that energy-saving appliance 17 catchments 24 is connected, other end shutoff, and the side of header of above catchmenting 24 is connected with some upper collecting chambers 25; Under catchment one end of header 28 be connected with a pipe network return pipe 20, other end shutoff, under the catchment side of header 28 be connected with some lower headers 27; Header of catchmenting on described 24, under catchment header 28, upper collecting chamber 25, lower header 27 be the straight tube of lateral opening hole; One end of upper collecting chamber 25 with on header 24 of catchmenting be connected, other end shutoff; One end of lower header 27 with under header 28 of catchmenting be connected, other end shutoff; The upper end of heat exchanger tube I 26 is connected with upper collecting chamber 25, and lower end is connected with lower header 27; Support I 29 is supported on the below of lower header 27, and the other end is fixed on ground; Sidewall 30 by be attached to upper collecting chamber 25, lower header 27, heat exchanger tube I 26 four block plates in outside surround; One end of sidewall 30 is connected with turning flue 16, and the other end is connected with the side plate 35 of condenser 18; One end of heat exchanger tube II 32 is connected with a point water header 31, and the other end is connected with header 33 of catchmenting; Side plate 35 is surrounded by four block plates, and one end is connected with the sidewall 30 of energy-saving appliance 17, and the other end is exhanst gas outlet; Heat exchanger tube II 32 is supported on support II 34, and support II 34 is fixed on ground.
Pipeline also comprises secondary pipe network return pipe 22, secondary pipe network feed pipe 23, and the backwater of secondary pipe network return pipe 22 is successively through point water header 31, the heat exchanger tube II 32 of condenser 18, header 33 of catchmenting; One end of header of catchmenting 33 is connected with secondary pipe network feed pipe 23, other end shutoff.
Further, rear fin panel casing 13, mid-board fin panel casing 37, left fin panel casing 36, prepattern water-cooling wall 6 to weld with band steel by pipe and form, and heat-preservation cotton is laid outside fin panel casing, can be incubated water-cooling wall, the fin panel casing after welding effectively can seal the flue gas in burner hearth.
Pressure combustion mode is adopted in burner hearth 5, only air blast can be configured in system, also air-introduced machine can be configured, the present invention is burner hearth 5 interior employing pressure combustion mode preferably, only can configure air blast in system, also can not configure air-introduced machine, strengthening stove combustion, in order to reduce system power consumption, reduce power consumption and initial investment cost.
The shape of heat exchanger tube I 26 and heat exchanger tube II 32 is unrestricted, and the present invention is preferably spiral fin coil, adds heating surface area during thermal energy exchange, reduces equipment volume.
The material of the heat exchanger tube I 26 of energy-saving appliance 17, heat exchanger tube II 32, side plate 35 is ND steel, examines and step on steel or austenitic stainless steel, effectively can alleviate cold end corrosion, extends this low temperature and is heated service life of equipment.
Convection bank 38 is made up of at least one light pipe, and the arrangement mode of Guan Zuzhong pipe generally adopts along row or stagger arrangement, and the present invention preferably adopts along row mode, effectively can reduce flue gas resistance, reduces the power consumption of air blast and reduces the supply gas pressure of natural gas.
Turning flue 16 is the frame structures being surrounded a hollow by four block plates, and floor projection is the elbow of 90 °, is conducive to the layout of energy-saving appliance 17 and condenser 18, reduces overall device place and takies.
Further, left fin panel casing 36 is provided with peephole 14; Above the burner hearth of left fin panel casing 36, be provided with explosion proof door 19 near furnace outlet position, peephole conveniently can observe stove combustion situation, is convenient to staff and manipulates boiler; The position of explosion proof door is chosen, and prevents its overtemperature, is convenient to fume leakage simultaneously and leads outside boiler room, guarantee the personal safety of staff.
The platform 4 of maintenance is set below burner 3, is convenient to boiler combustion manipulation and inspection is repaiied to burner.
Operation principle: pipe network backwater enters the compound backwater classification cooled flue gas that energy-saving appliance 17 and secondary pipe network backwater enter condenser 18, one time pipe network return water temperature is 70 ~ 90 DEG C, secondary pipe network return water temperature is 35 ~ 45 DEG C, the water of a pipe network and high-temperature flue gas are by heat exchanger tube I 26, prepattern water-cooling wall 6, rear fin panel casing 13, left fin panel casing 36, mid-board fin panel casing 37, countercurrent flow is carried out in convection bank 38, flue gas is made to be cooled to 80 ~ 120 DEG C, secondary pipe network backwater and high-temperature flue gas carry out countercurrent flow by the heat exchanger tube II 32 of condenser 18, flue gas is made to be cooled to 45 ~ 55 DEG C.

Claims (9)

1. a fin panel casing compound backwater condensing natural gas hot water boiler, comprise upper drum (8), lower drum (2), burner hearth (5), turning flue (16), energy-saving appliance (17), condenser (18), convection bank (38) and pipeline, by left-to-right body water inlet adapter (11) being provided with safety valve (9), air collector (10), pipeline successively on upper drum (8), air collector (10) is connected with a pipe network water supply pipe (21) of pipeline; The backwater of a pipe network return pipe (20) of pipeline successively through header (28) of catchmenting under energy-saving appliance (17), lower header (27), heat exchanger tube I (26), upper collecting chamber (25), on to catchment fin panel casing (13) after header (24), burner hearth (5), mid-board fin panel casing (37), left fin panel casing (36), prepattern water-cooling wall (6), convection bank (38), be finally communicated with upper drum (8); The upper end of convection bank (38) is connected with upper drum (8), lower end is connected with lower drum (2), one end of turning flue (16) is connected with convection bank (38), the other end is connected with the gas approach of energy-saving appliance (17), the exhanst gas outlet of energy-saving appliance (17) is connected with the gas approach of condenser (18), and the exhanst gas outlet of condenser (18) connects chimney; Sidewall (30) is surrounded by four block plates be attached to outside upper collecting chamber (25), lower header (27), heat exchanger tube I (26); One end of sidewall (30) is connected with turning flue (16), and the other end is connected with the side plate (35) of condenser (18).
2. it is characterized in that, described pipeline also comprises secondary pipe network return pipe (22), secondary pipe network feed pipe (23), and the backwater of secondary pipe network return pipe (22) is successively through point water header (31), heat exchanger tube II (32), the header of catchmenting (33) of condenser (18); One end of header of catchmenting (33) is connected with secondary pipe network feed pipe (23), other end shutoff.
3. according to a kind of fin panel casing compound backwater condensing natural gas hot water boiler described in claim 1, it is characterized in that, described rear fin panel casing (13), mid-board fin panel casing (37), left fin panel casing (36), prepattern water-cooling wall (6) to weld with band steel by pipe and form, and lay heat-preservation cotton outside fin panel casing.
4. a kind of fin panel casing compound backwater condensing natural gas hot water boiler according to claim 1 and 2, it is characterized in that, described heat exchanger tube I (26) and heat exchanger tube II (32) are spiral fin coil.
5. a kind of fin panel casing compound backwater condensing natural gas hot water boiler according to claim 3, it is characterized in that, the material of the heat exchanger tube I (26) of energy-saving appliance (17), heat exchanger tube II (32), side plate (35) is ND steel, examines and step on steel or austenitic stainless steel.
6. a kind of fin panel casing compound backwater condensing natural gas hot water boiler according to claim 1 and 2, it is characterized in that, described convection bank (38) is made up of at least one light pipe, and the arrangement mode of Guan Zuzhong pipe adopts along row.
7. a kind of fin panel casing compound backwater condensing natural gas hot water boiler according to claim 5, it is characterized in that, turning flue (16) is the frame structure being surrounded a hollow by four block plates, and floor projection is the elbow of 90 °.
8., according to a kind of fin panel casing compound backwater condensing natural gas hot water boiler described in claim 6, it is characterized in that, left fin panel casing (36) is provided with peephole (14); Above the burner hearth of left fin panel casing (36), near furnace outlet position, explosion proof door (19) is installed.
9. a kind of fin panel casing compound backwater condensing natural gas hot water boiler according to claim 7, is characterized in that, arranges the platform (4) of maintenance in burner (3) below.
CN201410684110.4A 2014-11-25 2014-11-25 A kind of compound backwater condensing natural gas hot water's boiler of fin panel casing Active CN104501397B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105299726A (en) * 2015-11-30 2016-02-03 天津宝成机械制造股份有限公司 Water way circulation energy saving system of gas-fired hot water boiler
CN107166356A (en) * 2017-06-06 2017-09-15 江苏四方锅炉有限公司 A kind of boiler for being used to handle papermaking wastewater

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US20140060458A1 (en) * 2012-08-31 2014-03-06 Nortiz Corporation Latent heat recovery type water heater
CN203561067U (en) * 2013-12-06 2014-04-23 哈尔滨红光锅炉总厂有限责任公司 Efficient forced-circulation gas-fired hot water boiler
CN203642143U (en) * 2013-11-15 2014-06-11 安阳方快锅炉有限公司 Flue gas condensation type superheated steam boiler
CN204478465U (en) * 2014-11-25 2015-07-15 江苏四方锅炉有限公司 Fin panel casing compound backwater condensing natural gas hot water boiler

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Publication number Priority date Publication date Assignee Title
CN102297423A (en) * 2011-08-11 2011-12-28 江苏四方锅炉有限公司 Membrane type water-cooled wall four-flue biomass circulating fluidized bed boiler
CN202791953U (en) * 2012-08-06 2013-03-13 安阳方快锅炉有限公司 Water pipe type condensation superheating steam generator
US20140060458A1 (en) * 2012-08-31 2014-03-06 Nortiz Corporation Latent heat recovery type water heater
CN203642143U (en) * 2013-11-15 2014-06-11 安阳方快锅炉有限公司 Flue gas condensation type superheated steam boiler
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CN204478465U (en) * 2014-11-25 2015-07-15 江苏四方锅炉有限公司 Fin panel casing compound backwater condensing natural gas hot water boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105299726A (en) * 2015-11-30 2016-02-03 天津宝成机械制造股份有限公司 Water way circulation energy saving system of gas-fired hot water boiler
CN107166356A (en) * 2017-06-06 2017-09-15 江苏四方锅炉有限公司 A kind of boiler for being used to handle papermaking wastewater

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