CN202119089U - Normal-pressure hot water boiler - Google Patents

Normal-pressure hot water boiler Download PDF

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Publication number
CN202119089U
CN202119089U CN2011201935959U CN201120193595U CN202119089U CN 202119089 U CN202119089 U CN 202119089U CN 2011201935959 U CN2011201935959 U CN 2011201935959U CN 201120193595 U CN201120193595 U CN 201120193595U CN 202119089 U CN202119089 U CN 202119089U
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CN
China
Prior art keywords
boiler
heat exchanger
cavity
water
bag
Prior art date
Application number
CN2011201935959U
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Chinese (zh)
Inventor
张书峰
Original Assignee
张书峰
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Priority to CN2011201935959U priority Critical patent/CN202119089U/en
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Publication of CN202119089U publication Critical patent/CN202119089U/en

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Abstract

A normal-pressure hot water boiler is mainly characterized in that a boiler body is formed by an upper boiler body, a lower boiler body and a heat exchanger which are in detachable connection. A water cycling channel of the heat exchanger is communicated with water cycling channels of the upper boiler body and the lower boiler body and communicated with a water supply source through an electric control valve so as to form a boiler water cycling loop. A fume cycling channel of the heat exchanger is communicated with fume cycling channels of the upper boiler body and the lower boiler body through chimneys and communicated with a dedusting tank so as to form a boiler fume cycling loop. An automatic control device is respectively electrically connected with a boiler top water temperature probe, a discharged hot water temperature probe of the boiler, a preheated water temperature probe on the heat exchanger, a draught fan and an electric control valve. Automatic safety exhaust valves are arranged on the upper boiler body, the lower boiler body and the heat exchanger respectively. Thermal energy can be completely utilized by means of the normal-pressure hot water boiler, heat efficiency is improved, fume discharging temperature is low, and discharged water is high in speed, high in temperature, stable and large in flow quantity. In addition, energy saving, emission reduction and consumption reduction can be effectively achieved, and environment protection effect is fine.

Description

A kind of normal-pressure hot-water boiler
Technical field
The utility model relates to a kind of boiler, particularly a kind of normal-pressure hot-water boiler, and it is applicable to heating and shower.
Background technology
At present, people once adopted a kind of normal-pressure hot-water boiler in heating, when taking a shower; The body of heater of this boiler is a monolithic construction; Mainly by the flue of monoblock type shell and interior setting thereof, the upper, middle and lower-ranking horizontal water tube is arranged in the flue, the chimney that is positioned at the shell top is communicated with flue and constitutes through impact tube.Recirculated water in this boiler is to circulate through retaining chamber that forms between shell and the flue and the horizontal water tube that is communicated with the retaining chamber from bottom to top, and its heating surface area is little, water capacity is bigger, and the consumption coal is many, and intensification slowly.And internal combustion flame direct radiation flue in combustion chamber after high-temperature flue gas upwards flows and heats horizontal water tube, directly gets into chimney through impact tube to discharge; Flue gas flow is short; It is insufficient to burn, and heat is discharged with flue gas greatly, and its thermal efficiency is lower; And the flue-gas temperature that is discharged is higher, causes energy waste.And, when water temperature is too high, in horizontal water tube, form easily incrustation scale, be prone to cause the water pipe explosion, can shorten the service life of boiler, make troubles and lose to the user.Simultaneously, this boiler also keeps in repair inconvenience.
Summary of the invention
The purpose of the utility model is to provide a kind of normal-pressure hot-water boiler, and it can overcome the deficiency of prior art, can increase boiler heating surface effectively, makes heat energy obtain utilizing cmpletely, improves the thermal efficiency widely; And, have security performance height, exhaust gas temperature low, go out that water speed is fast, temperature is high, the stable and big characteristics of flow; Simultaneously, energy-saving and emission-reduction effectively, consumption reduction have good environment protecting.
Its solution is: boiler body is made up of boiler upper body, boiler lower body and the detachable connection of heat exchanger.And the water circulation channel in the heat exchanger is connected with boiler upper body and the interior water circulation channel of boiler lower body, is connected with watering through motor-operated control valve again, constitutes the boiler water cycle loop.Flue gas recirculation passage in this heat exchanger through chimney successively with boiler upper body and boiler lower body in the flue gas recirculation channel connection, be communicated with formation boiler smoke closed circuit again with the dedusting pond through smoke exhaust pipe.Through the water in the dedusting pond, can be to the discharged flue gas desulfurization and dedusting.On heat exchanger, boiler upper body and boiler lower body, be respectively arranged with the automatic safe air bleeding valve, be used for discharging at any time in the heat exchanger and steam and residual air in the boiler upper and lower body.Can control the water inlet and the water outlet of boiler automatically through motor-operated control valve.And automaton respectively be arranged on the boiler upper body on furnace roof water temperature probe, be arranged on the boiler lower body go out hot water temperature's probe, be arranged on the preheating water temp probe on the heat exchanger and the motor-operated control valve that is connected with watering and with the air-introduced machine electrical connection that links to each other with the dedusting pond.Water temperature in the boiler can be set, regulate arbitrarily through this automaton, and water temperature in the automatically test, control boiler, the unlatching of air-introduced machine can also be controlled, and when water temperature boiler in autostop and alarm during above the high temperature of setting.
Said boiler lower body is made up of the lower body inner bag of body case and interior setting thereof down.Constitute boiler lower body water circulation channel at the cavity that forms between body case and the lower body inner bag down, and in this cavity, be distributed with the lower body vertical fire tube, constitute second-time burning.Be arranged on the lower body fire-proof plate in the lower body inner bag cavity; Lower body inner bag cavity is separated into lower floor's cavity and upper strata cavity two parts; Lower floor's cavity constitutes the primary zone, and the upper strata cavity constitutes three combustion chambers, said primary zone, secondary combustion chamber and three combustion chambers
Be interconnected, constitute boiler lower body flue gas recirculation passage.
Described boiler upper body is by the upper body inner bag of last body case and interior setting thereof, and the upper body end socket that the two is connected with them constitutes.The cavity of cavity that between last body case and upper body inner bag, forms and the upper body end socket that is connected with this cavity constitutes the upper body water circulation channel; And be distributed with the upper body vertical fire tube in the cavity that on this, forms between body case and the upper body inner bag, constitute five times the combustion chamber.Be arranged on lower floor's fire-proof plate and upper strata fire-proof plate in the inner bag cavity of upper body; Upper body inner bag cavity is separated into upper body lower floor cavity constitutes four combustion chambers; Middle level, upper body cavity constitutes seven combustion chambers; Upper strata, upper body cavity constitutes six combustion chambers, and four combustion chambers are connected formation boiler upper body flue gas recirculation passage successively with five combustion chambers, six combustion chambers and seven combustion chambers.
Described heat exchanger is made up of the heat exchanger inner bag of outer cover of heat exchanger and interior setting thereof.The cavity that between this outer cover of heat exchanger and heat exchanger inner bag, forms constitutes three Heat Rooms; The cavity that chimney outer tube in heat exchanger inner bag cavity and being sleeved on forms between the chimney in this chimney outer tube constitutes the secondary heat exchange chamber; The cavity that forms between the inner chamber of said chimney and exchanger head constitutes a Heat Room; And one time Heat Room is connected with secondary heat exchange chamber and three Heat Rooms successively, constitutes the heat exchanger water circulation channel.And this chimney is connected with the cavity of heat exchanger inner bag, constitutes heat exchanger flue gas recirculation passage.
The utility model adopts technique scheme, has following advantage:
1, because this boiler adopts the water temperature in the automaton control boiler; Make the interior water temperature of stove be no more than the highest water temperature of 90 degree of setting; In case when water temperature surpassed 90 degree temperature in the boiler, automaton will be reported to the police automatically, and control air inducing stool quits work automatically; Again owing to be provided with the automatic safe air bleeding valve at the top of heat exchanger and boiler upper body and the hot water exit of boiler lower body; Can discharge steam and residual air in heat exchanger and the boiler upper and lower body at any time; Make in heat exchanger and the boiler upper and lower body and be not easy to form steam and pressure, thereby can improve the security performance of boiler.And this boiler is that cold water advances hot water and goes out, can continual discharging hot water.Simultaneously, this boiler goes out hot water temperature's height, speed is fast, and it is stable to go out hot water, and it is big to go out hot water flow.Through test shows, per hour coal-fired about 30 kilograms of this boiler, but about 12 tons of the shower hot water of output 43 degree, and this boiler just can be accomplished with interior about 3 minutes greatly from the hot water of lighting a fire to.Test is proof again, and about about 3 minutes and 30 seconds, motor-operated control valve can be opened fully greatly, goes out the hot water amount and reaches the top.And existing hot-water boiler per hour goes out the shower hot water of 12 ton of 43 degree, needs approximately about 2 hours 30 minutes time, and Coal-fired capacity is about 80 kilograms, compared with present technology can save time more than 65%, saves coal more than 65%.
2, owing to this boiler by constituting boiler upper and lower body and detachable being connected of heat exchanger, and the heating surface area in heat exchanger and the boiler upper and lower body is big, fire increases with the circulation process of flue gas; With the water that gets in heat exchanger and the boiler upper and lower body, from top to bottom, from bottom to top;, in heat exchanger and boiler upper and lower body, carry out heat exchange from bottom to top fully gradually more from top to bottom, heat energy is fully used; Improve the thermal efficiency, compare with the prior art hot-water boiler, the thermal efficiency can improve more than 90%; Thereby can reduce use cost, save time, the stoker personnel are freed from heavy manual labor.Moreover only about 80 degree, chimney is low in addition for this exhaust gas temperature, and chimney also can pass from indoor, can make full use of waste heat again once more and be used for the heating in winter, can reduce use cost once more.Again since in this boiler used fire tube be vertical tube, and pyrotechnics passes through from vertical fire tube, can not produce incrustation scale, is difficult for explosion, thereby can improves the service life of boiler.Simultaneously, in use when a certain position goes wrong, be convenient to observe maintenance and maintenance.
3, because this boiler self has the function of resistance cigarette, back-fire relief and resistance dust; All be provided with the outer desulfurization and dedusting pond of dirt pocket and boiler in addition in heat exchanger and the boiler upper and lower body, the flue dust of discharging in boiler upper and lower body and the heat exchanger is absorbed through the dedusting of self and the filtration in desulfurization and dedusting pond, arrange compared with present technology to the flue dust of atmosphere; Flue dust can reduce more than 90%; Environment protecting is good, but also economizes coal, can reach energy-saving and emission-reduction and energy-saving and cost-reducing effect.
Description of drawings
Fig. 1 is a kind of structural representation of normal-pressure hot-water boiler.
Fig. 2 is the A-A cutaway view among Fig. 1.
Fig. 3 is the B-B cutaway view among Fig. 1.
Fig. 4 is the C-C cutaway view among Fig. 1.
The specific embodiment
Describe the specific embodiment of the utility model in detail below in conjunction with accompanying drawing.
Among Fig. 1 to Fig. 4, boiler body is by boiler lower body and boiler upper body and detachable connection of heat exchanger and constitute.Said boiler lower body is connected on the fire grate 3, and fire grate 3 is connected with boiler foundation 1 through fire grate carriage 31, and boiler foundation 1 is provided with slag notch 2, and the boiler lower body is provided with coal filling hole 6.This boiler lower body is by body case 4 and suit lower body inner bag 5 within it constitute down.Constitute boiler lower body water circulation channel at the cavity that forms between body case 4 and the lower body inner bag 5 down 56, and in this cavity 56, be distributed with lower body vertical fire tube 7 formation secondary combustion chambers.Be arranged on the lower body fire-proof plate 29 in lower body inner bag 5 cavitys, the cavity of lower body inner bag 5 is separated into lower floor's cavity 8, constitute the primary zone, and upper strata cavity 9, constitute three times the combustion chamber, and the cleaning door 28 that is positioned on the boiler lower body is communicated with three combustion chambers.And the primary zone is connected with secondary combustion chamber and three combustion chambers successively, constitutes boiler lower body flue gas recirculation passage.The hot water temperature that goes out that the upper side of this boiler lower body is provided with the hot water outlet 11, boiler lower body automatic safe air bleeding valve 12 and the boiler that are connected with boiler lower body water circulation channel pops one's head in 10, and then the lower side of boiler lower body is provided with boiler lower body water inlet 30.And be connected with the boiler lower body and through the coupled boiler upper body that connects of flange, by last body case 13 and be set in the upper body inner bag 14 in it and the two is tightly connected with them upper body end socket 19 constitutes.The cavity 55 that between last body case 13 and upper body inner bag 14, forms; And the cavity of the upper body end socket 19 that is connected with this cavity 55 formation boiler upper body water circulation channel, it is connected with boiler lower body water circulation channel, and in said cavity 55, is distributed with upper body vertical fire tube 16; Constitute five times the combustion chamber; Be arranged on the fire-retardant plate 26 of fire-retardant plate 25 in upper strata, upper body and upper body lower floor in upper body inner bag 14 cavitys, the cavity of this upper body inner bag 14 be separated into upper body lower floor cavity 15 constitute four combustion chambers, middle level, upper body cavity 17 constitutes seven combustion chambers and upper strata, upper body cavity 18 constitutes six combustion chambers; And; Five combustion chambers that four combustion chamber warps are communicated with it are communicated with six combustion chambers, and six combustion chambers are communicated with seven combustion chambers through the fire-retardant anti-burner 24 on the fire-retardant plate 25 in upper strata, upper body, formation boiler upper body flue gas recirculation passage; This boiler upper body flue gas recirculation passage is connected with boiler lower body flue gas recirculation passage, constitutes lower body flue gas recirculation passage on the boiler.Be provided with the boiler upper body automatic safe air bleeding valve 20, the outlet 21 of boiler upper body preheating water and the furnace roof coolant-temperature gage probe 22 that are connected with boiler upper body water circulation channel on top, boiler upper body, this boiler upper body preheating water outlet 21 is connected with said boiler lower body water inlet 30 through outer connecting pipe 23.Side in the boiler upper body is provided with upper body preheating water water inlet 27 and boiler exhaust gas mouth; This upper body preheating water water inlet 27 is communicated with heat exchanger preheating water outlet 35 through preheating water tube connector 34, and the boiler exhaust gas mouth is communicated with heat exchanger through the chimney 38 that is connected with its flange.Said heat exchanger is made up of the heat exchanger inner bag 33 of outer cover of heat exchanger 32 and interior suit thereof and the exchanger head 40 that the two is tightly connected with them.The cavity 57 that between this outer cover of heat exchanger 32 and heat exchanger inner bag 33, forms constitutes three Heat Rooms; Be arranged on the chimney outer tube 42 in heat exchanger inner bag 33 cavitys 58; And be sleeved on the cavity 59 that forms between the chimney 38 in this chimney outer tube 42 and constitute the secondary heat exchange chamber; This secondary heat exchange chamber is communicated with three Heat Rooms through heat exchange tube connector 43, and the cavity that forms between the cavity body of exchanger head 40 and the chimney 38 constitutes a Heat Room.And a described Heat Room is connected with secondary heat exchange chamber and three Heat Rooms successively, constitutes the heat exchanger water circulation channel.Being arranged on the preheating water temp probe 36 that the heat exchanger preheating water exports 35 places is connected with the heat exchanger water circulation channel.And; This heat exchanger water circulation channel is again through being communicated with boiler upper body water circulation channel with its said preheating water that is communicated with successively outlet 35, preheating water tube connector 34 and upper body preheating water water inlet 27; Also process is arranged on the heat exchanger top and is connected with the motor-operated control valve that connects towerless water supply device watering 54 50 with the cold water inlet 39 and the cold water inlet 47 of the connection of heat exchanger water circulation channel, thereby constitutes the boiler water cycle loop.Can control the water inlet and the water outlet of boiler automatically through motor-operated control valve 50.Also be provided with the heat exchanger automatic safe air bleeding valve 37 that is connected with the heat exchanger water circulation channel at the top of heat exchanger.And the intracavity inter-connection of chimney 38 and heat exchanger inner bag 33 constitutes heat exchanger flue gas recirculation passage.The flue gas recirculation passage is communicated with dedusting pond 51 through exhaust opening 41 and the smoke exhaust pipe 48 that is communicated with it in the said heat exchanger, this heat exchanger flue gas recirculation passage also with boiler on lower body flue gas recirculation passage be connected, thereby formation boiler smoke closed circuit.Can be through the water in the dedusting pond 51 to the flue gas desulfurization and dedusting of boiler emission.Automaton 49 respectively with motor-operated control valve 50 and air-introduced machine 52 electrical connections that are connected with dedusting pond 51, this automaton 49 again respectively through from three electric connection line a wherein drawing, b, c respectively be arranged on the boiler upper body on corresponding furnace roof water temperature probe 22, be arranged on the corresponding hot water temperature of going out on the boiler lower body pop one's head in 10 and the corresponding preheating water temp probe 36 that is arranged on the heat exchanger be electrically connected.Can set arbitrarily through automaton 49 and to regulate water temperature in the boiler, and can test, control the water temperature in the boiler automatically, can also control autostop and alarm when water temperature surpasses the high temperature of setting in unlatching and the boiler of air-introduced machine 52.
During boiler work, when motor-operated control valve 50 is opened,, get into the heat exchanger water circulation channel under the control of automaton 49 through cold water inlet 47 and cold water inlet 39 from the cold water of towerless water supply device watering 54.And the hot flue gas in the boiler upper body gets in the heat exchanger through chimney 38; And be full of the cavity of heat exchanger inner bag 33; Under the effect of this hot flue gas; Make the cold water that gets in the heat exchanger water circulation channel successively in Heat Room, secondary heat exchange chamber and three Heat Rooms Natural Circulation carry out three heat exchanges; Cold water is carried out preheating, and the water after the heat exchanger preheating gets into boiler upper body water circulation channels through said preheating water outlet 35, preheating water tube connector 34 and upper body preheating water water inlet 27 more successively, and this preheating water is circulation from bottom to top in the water circulation channel of boiler upper body; And under the effect of the hot flue gas in getting into the boiler upper body flue gas recirculation passage that constitutes by four combustion chambers, boiler upper body, five combustion chambers, six combustion chambers and seven combustion chambers; Carry out four heat exchanges, for the second time boiler water is carried out preheating, and preheating water outlet 21 discharges from the boiler upper body of the boiler water of preheating for the second time; Successively through outer connecting pipe 23 and boiler lower body water inlet 30, get into boiler lower body water circulation channel and carry out Natural Circulation again.Because getting into the indoor ignition temperature of primary combustion, the fire of boiler furnace internal combustion and flue gas can reach the 700-900 degree; When the fire and the flue gas of the indoor high temperature of primary combustion, under the situation of fire-retardant anti-burning, after the entering secondary combustion chamber burns; Getting into three combustion chambers again burns; The heating surface and the heating surface area of boiler are increased effectively, and get into the secondary preboiler water of boiler lower body water circulation channel, under the situation of fire in the boiler lower body flue gas recirculation passage that constitutes that communicates by primary zone, secondary combustion chamber and three combustion chambers and fume high-temperature burning; Carry out three heat exchanges; Make boiler water in the boiler lower body by heating rapidly, reach the water temperature of setting after, can be from 11 dischargings of the hot water outlet on the boiler lower body.Add in the process of hot water at boiler,, discharge steam and residual air in heat exchanger and the boiler upper and lower body at any time through the automatic safe air bleeding valve 37 on the heat exchanger and automatic safe air bleeding valve 20 on the boiler upper body and the automatic safe air bleeding valve 12 on the boiler lower body; Through the furnace roof coolant-temperature gage on automaton and the boiler upper body that is electrically connected with it pop one's head in 22, on the boiler lower body go out the hot water temperature pop one's head in 10 and heat exchanger on preheating water temp probe 36; Can set the interior water temperature of boiler arbitrarily also can test automatically; Autostop and alarm when water temperature surpasses the maximum temperature of setting in the water temperature of control in the boiler, the unlatching that can also control the air inducing stool and boiler.Simultaneously, the dirt that gets in the heat exchanger is discharged from the sewage draining exit 44 on the heat exchanger, and dust is discharged from heat exchanger ash disposal mouth 45, and the dust in the boiler upper and lower body is removed from removing ash of boiler mouth 28.Thereby can guarantee in the boiler the effective dedusting of self, the desulfurization and dedusting in the outer dedusting pond of boiler can reduce the soot emissions of boiler effectively in addition, helps environmental protection.

Claims (4)

1. normal-pressure hot-water boiler; Comprise body of heater; It is characterized in that boiler body is made up of boiler upper body, boiler lower body and the detachable connection of heat exchanger; The water circulation channel of this heat exchanger is connected with the water circulation channel of boiler upper body and boiler lower body; Be connected with watering (54) through motor-operated control valve (50) again, constitute the boiler water cycle loop, and the flue gas recirculation passage of heat exchanger be connected through the flue gas recirculation passage of chimney (38) with boiler upper body and boiler lower body; Be communicated with dedusting pond (51) through smoke exhaust pipe (48) again; Constitute the boiler smoke closed circuit, heat exchanger is provided with heat exchanger automatic safe air bleeding valve (37), and the boiler upper body is provided with upper body automatic safe air bleeding valve (20); The boiler lower body is provided with lower body safety exhaust (12), and automaton (49) respectively be arranged on the boiler upper body on furnace roof coolant-temperature gage probe (22), be arranged on the boiler lower body go out hot water temperature's probe (10), be arranged on the heat exchanger preheating water temp probe (36) and motor-operated control valve (50) and with air-introduced machine (52) electrical connection that links to each other with dedusting pond (51).
2. a kind of normal-pressure hot-water boiler as claimed in claim 1; It is characterized in that the boiler lower body is made up of the lower body inner bag (5) of body case (4) and interior setting thereof down; Constitute boiler lower body water circulation channel at the cavity (56) that forms between body case (4) and the lower body inner bag (5) down; And in said cavity (56), be distributed with lower body vertical fire tube (7) and constitute secondary combustion chamber; Be arranged on the lower body fire-proof plate (29) in lower body inner bag (5) cavity, the cavity of this lower body inner bag (5) is separated into lower floor's cavity (8) constitutes the primary zone, and upper strata cavity (9) constitute three combustion chambers; Said primary zone, secondary combustion chamber and three combustion chambers are connected, and constitute boiler lower body flue gas recirculation passage.
3. a kind of normal-pressure hot-water boiler as claimed in claim 1; It is characterized in that the upper body inner bag (14) of boiler upper body by last body case (13) and interior setting thereof; And the upper body end socket (19) that the two is connected with them constitutes; The cavity formation boiler upper body water circulation channel of cavity (55) that between last body case (13) and upper body inner bag (14), forms and the upper body end socket (19) that is connected with this cavity (55); And in said cavity (55), be distributed with upper body vertical fire tube (16) and constitute five combustion chambers, be arranged on upper body lower floor fire-proof plate (26) and upper strata, upper body fire-proof plate (25) in upper body inner bag (14) cavity, the cavity of this upper body inner bag (14) is separated into upper body lower floor cavity (15) constitutes four combustion chambers; Middle level, upper body cavity (17) constitutes seven combustion chambers; Upper strata, upper body cavity (18) constitutes six combustion chambers, and described four combustion chambers are connected with five combustion chambers, six combustion chambers and seven combustion chambers, constitutes boiler upper body flue gas recirculation passage.
4. a kind of normal-pressure hot-water boiler as claimed in claim 1; Its characteristic constitutes in the heat exchanger inner bag (33) of heat exchanger by outer cover of heat exchanger (32) and interior setting thereof; The cavity (57) that between this outer cover of heat exchanger (32) and heat exchanger inner bag (33), forms constitutes three Heat Rooms; Be arranged in the chimney outer tube (42) of heat exchanger inner bag (33) cavity and be sleeved on the cavity (59) that forms between the chimney (38) of this chimney outer tube (42) and constitute the secondary heat exchange chamber; The cavity that forms between the inner chamber of chimney (38) and exchanger head (40) constitutes a Heat Room, and a described Heat Room is connected with secondary heat exchange chamber and three Heat Rooms, constitutes the heat exchanger water circulation channel; And chimney (38) is connected with the cavity body (58) of heat exchanger inner bag (33), constitutes heat exchanger flue gas recirculation passage.
CN2011201935959U 2011-06-03 2011-06-03 Normal-pressure hot water boiler CN202119089U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201935959U CN202119089U (en) 2011-06-03 2011-06-03 Normal-pressure hot water boiler

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Application Number Priority Date Filing Date Title
CN2011201935959U CN202119089U (en) 2011-06-03 2011-06-03 Normal-pressure hot water boiler

Publications (1)

Publication Number Publication Date
CN202119089U true CN202119089U (en) 2012-01-18

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Application Number Title Priority Date Filing Date
CN2011201935959U CN202119089U (en) 2011-06-03 2011-06-03 Normal-pressure hot water boiler

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Country Link
CN (1) CN202119089U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287911A (en) * 2011-06-03 2011-12-21 张书峰 Normal-pressure hot water boiler
CN105258336A (en) * 2015-09-17 2016-01-20 哈尔滨市金京锅炉有限公司 Efficient and environment-friendly boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287911A (en) * 2011-06-03 2011-12-21 张书峰 Normal-pressure hot water boiler
CN105258336A (en) * 2015-09-17 2016-01-20 哈尔滨市金京锅炉有限公司 Efficient and environment-friendly boiler

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Granted publication date: 20120118

Termination date: 20130603