CN102022821A - Vertical gas fired boiler - Google Patents
Vertical gas fired boiler Download PDFInfo
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- CN102022821A CN102022821A CN 201010616707 CN201010616707A CN102022821A CN 102022821 A CN102022821 A CN 102022821A CN 201010616707 CN201010616707 CN 201010616707 CN 201010616707 A CN201010616707 A CN 201010616707A CN 102022821 A CN102022821 A CN 102022821A
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Abstract
The invention relates to a vertical gas fired boiler, comprising a chimney, a smoke venting cover, an outer boiler furnace, water jackets, a fire tube, hearths and a boiler door tube, wherein the chimney is welded on the smoke venting cover; the smoke venting cover is installed at the top of the outer boiler furnace; an upper hearth is formed between the lower part of the smoke venting cover and each of an upper side plate and an upper embossed plate; the outer boiler furnace is internally provided with the fire tube; a lower hearth is positioned in an inner boiler furnace; the boiler door tube is communicated with the lower hearth; the gap between the periphery of the inner boiler furnace and the outer boiler furnace forms a lower interlayer water jacket; an upper interlayer water jacket is communicated with the upper part of a water containing cavity; and the lower part of the water containing cavity is communicated with the lower interlayer water jacket. The vertical gas fired boiler is characterized in that the fire tube is internally provided with a water tube, the upper hearth is internally provided with an upper horizontal water tube, the lower hearth is internally provided with a lower horizontal water tube, the upper end of the water tube is welded on the through hole of the upper horizontal water tube, and the lower end of the water tube is welded on the through hole of the lower horizontal water tube. A water interlayer and a horizontal water tank can also be arranged on the smoke venting cover. The vertical gas fired boiler has large heat exchange area and high thermal efficiency.
Description
Technical field
The present invention relates to a kind of vertical gas fired-boiler, specifically is a kind of vertical gas normal-pressure hot-water boiler.
Background technology
Along with the increase of city farm building area, the demand of gas normal-pressure boiler also increases, and vertical gas normal-pressure boiler floor space is little, and the family that is fit to town and country uses.Existing vertical gas normal-pressure boiler is the fire tube gas normal-pressure boiler, and smoke evacuation to cover interlayer be the heat-insulation and heat-preservation material, its heat is not fully used, the heat exchange area that is actually used in heating system is little, exhaust gas temperature higher (160 ℃～250 ℃), the thermal efficiency is low, and air consumption is also bigger.
Summary of the invention
In order to overcome the existing deficiency that vertical gas normal-pressure boiler heat exchange area is little, the thermal efficiency is low, air consumption is also bigger, the invention provides the vertical gas normal-pressure boiler that a kind of heat exchange area is big, the thermal efficiency is high.
Design of the present invention is the heat exchange area that increases existing vertical gas fired-boiler, mainly is to set up water pipe in the fire tube of existing vertical gas fired-boiler.In order further to increase heat exchange area, in the smoke evacuation lid, set up water interlayer, substitute the smoke evacuation lid of traditional no water jacket, utilize the heat of burning fully.
This vertical gas fired-boiler comprises chimney, smoke evacuation lid, furnace outside-lining, water jacket, fire tube, water containing chamber, burner hearth and fire door pipe, chimney is welded on smoke evacuation and covers, the smoke evacuation lid is installed in the top of furnace outside-lining and tightens together with furnace outside-lining, fixing return pipe and fire door pipe at furnace outside-lining, furnace outside-lining is base down.Welding the epipleural that encloses round in the furnace outside-lining inboard, the interval between furnace outside-lining and the epipleural constitutes goes up intercalated water sleeve, the upper end closed of last intercalated water sleeve.Welding the upper face plate of distribution through hole under the epipleural in furnace outside-lining, constituting upper furnace between the bottom of smoke evacuation lid and epipleural, the upper face plate, fire tube is being set in furnace outside-lining, the upper end of fire tube is welded on the through hole of upper face plate.The lower face plate of distribution through hole also is being set, and the lower end of fire tube is welded on the through hole of lower face plate.Fire tube, upper face plate and lower face plate and shell constitute water containing chamber.Lower hearth is positioned at the furnace internal-lining that forms a circle below lower face plate and the lower face plate, the fire door pipe communicates with lower hearth, around the furnace internal-lining and the interval between the furnace outside-lining constitutes water interlayer cover down, and last intercalated water sleeve communicates with the top of water containing chamber, and the bottom of water containing chamber communicates with following water interlayer water jacket; It is characterized in that: water pipe is being set in fire tube, horizontal water tube in upper furnace, being installed with, the two ends of last horizontal water tube are welded on epipleural and communicate with last intercalated water sleeve, horizontal water tube down is installed in lower hearth, the two ends of following horizontal water tube are welded on the furnace internal-lining and with following intercalated water sleeve and communicate, every go up horizontal water tube and every following horizontal water tube all have with fire tube about corresponding through hole, the upper end of water pipe is welded on the through hole of horizontal water tube, the lower end is welded on down the through hole of horizontal water tube.
Above-mentioned vertical gas fired-boiler is characterized in that: the smoke evacuation lid has water interlayer and horizontal water tank, and the smoke evacuation lid has shell and inner casing, and the interval between shell and the inner casing constitutes water interlayer, and the water interlayer of smoke evacuation lid connects logical with the last intercalated water sleeve of furnace outside-lining; The two ends of horizontal water tank are welded on inner casing and communicate with the water interlayer of smoke evacuation lid, and delivery port is welded on the shell of smoke evacuation lid.Fastening the bend pipe in the outside on furnace outside-lining top covers also fastening bend pipe in smoke evacuation, and fastening connecting tube communicates the water interlayer of smoke evacuation lid between the bend pipe of smoke evacuation lid and the bend pipe of furnace outside-lining with the last intercalated water sleeve connection of furnace outside-lining.
Above-mentioned vertical gas fired-boiler is characterized in that: be positioned at furnace internal-lining on base base plate is being set, the interval between base plate and the base constitutes end water interlayer, and end water interlayer communicates with following intercalated water sleeve.
Above-mentioned vertical gas fired-boiler is characterized in that: the water capacity chamber in the pot chamber is installed with pipe with spiral pipe, and the two ends of pipe with spiral pipe connect with cold water inlet and hot water outlet respectively, and hot water is provided.
Because this vertical gas fired-boiler is taked said structure, improved the heat transfer area of fire tube, reduced the loss of heat, the smoke evacuation cover cavity adopts cyclic water jacket to cool off, obviously reduce exhaust gas temperature, increased heat exchange area, improved the thermal efficiency, reduce the combustion gas air consumption of gas fired-boiler, improved the utilization rate of heat.This boiler finds that through operation test exhaust gas temperature reduces than like product, and the thermal efficiency exceeds like product.The model machine of the embodiment one of this vertical gas fired-boiler is tested through the applicant, and the thermal efficiency reaches 90%.
Description of drawings
Fig. 1 is the front view of this vertical gas fired-boiler embodiment one.
Fig. 2 is and the corresponding left view of Fig. 1.Fig. 3 is and the corresponding right view of Fig. 1.
Fig. 4 is the cutaway view along A-A line among Fig. 2.
Fig. 5 is the cutaway view along B-B line among Fig. 4, omits each outer mouth of pipe of shell among the figure.
Fig. 6 is the cutaway view along C-C line among Fig. 4, omits water return outlet and fire door pipe among the figure.
Fig. 7 is the partial sectional view along D-D line among Fig. 4.
Fig. 8 is the partial enlarged drawing in Fig. 4 upper right corner.
Fig. 9 is a bend pipe and the enlarged drawing that connects of straight tube, partly cut-away among the figure.
Figure 10 is the structure chart of this vertical gas fired-boiler embodiment two.
Among the above-mentioned figure:
3-water level sensor interface 4-fastening assembly is covered in 1-chimney 2-smoke evacuation
5-elbow 6-connecting tube 7-pot body 8-air inlet
9-burner 10-connecting flange 11-fire door pipe 12-base
13-return pipe 14-connecting tube 15-delivery port 16-cold water inlet
17-pressure limiting valve 18-hot water outlet 19-water temperature inductor interface 20-elbow
21-upper furnace 22-goes up intercalated water sleeve 23-upper face plate 24-water containing chamber
Water interlayer 28-furnace internal-lining at the bottom of the 25-furnace outside-lining 26-base plate 27-
Horizontal water tube under the intercalated water sleeve 30-lower hearth 31-lower side panel 32-under the 29-
33-lower face plate 34-fire tube 35-water pipe 36-pipe with spiral pipe
37-epipleural 38-through hole 39-goes up horizontal water tube 40-outlet pass
The horizontal water tank 42-of 41-inner casing 43-water interlayer 44-shell
45-water 46-goes up bent plate 47-fastening bolt 48-hex nut
The 49-smoke evacuation is covered positioning sleeve 50-smoke evacuation and is covered bent plate under the end 51-asbestos pad 52-
Ring 55-bell 56-tight loop in the 53-sealing ring 54-
The 60-insulation material is covered in 57-external screw thread 58-chimney 59-smoke evacuation
61-upper furnace 62-goes up bent plate 63-fastening bolt 64-hex nut
Bent plate 66-goes up intercalated water sleeve 67-epipleural 68-upper face plate under the 65-
69-furnace outside-lining 70-water containing chamber 71-lower face plate 72-air inlet
Water interlayer at the bottom of the 73-burner 74-fire door pipe 75-base 76-
Intercalated water sleeve 80-lower side panel under the 77-base plate 78-return pipe 79-
Horizontal water tube 84-cold water inlet under the 81-furnace internal-lining 82-lower hearth 83-
85-fire tube 86-water pipe 87-pipe with spiral pipe 88-hot water outlet
89-delivery port 90-goes up horizontal water tube
The specific embodiment
Describe the specific embodiment of this vertical gas fired-boiler in detail below in conjunction with embodiment and accompanying drawing thereof, but the specific embodiment of this vertical gas fired-boiler is not limited to following embodiment.
Embodiment one
The vertical gas fired-boiler that Fig. 1, Fig. 2, Fig. 3 and Fig. 4 describe comprises that chimney 1, smoke evacuation cover 2, furnace outside-lining 25, water containing chamber 24, fire tube 34, burner hearth and fire door pipe 11, chimney 1 is welded on smoke evacuation and covers on 2, smoke evacuation is covered 2 and is installed in the top of furnace outside-lining 25 and is tightened together by securing member, fixing return pipe 13 and fire door pipe 11 at furnace outside-lining 25, furnace outside-lining is for 25 times a base 12.Welding four blocks of epipleurals 37 that form a circle in furnace outside-lining 25 inboards, the interval between furnace outside-lining 25 and the epipleural 37 constitutes goes up intercalated water sleeve 22, the upper end closed of last intercalated water sleeve 22.Epipleural is welding the upper face plate 23 of distribution through hole for 37 times in furnace outside-lining 25, formation upper furnace 21 between the upper face plate 23 that smoke evacuation cover 2, epipleural 37 and furnace outside-lining 25 are interior, fire tube 34 is being set in furnace outside-lining 25, the upper end of fire tube 34 is welded on the through hole of upper face plate 23, the lower face plate 33 of distribution through hole also is being set, and the lower end of fire tube 34 is welded on the through hole of lower face plate 33.The fire tube 34 of present embodiment has nine, and upper face plate 23 respectively has nine through holes with lower face plate 33, and nine fire tubes 34, upper face plates 23 constitute water containing chamber 24 with lower face plate 33 and furnace outside-lining 25.Lower hearth 30 is positioned at the furnace internal-lining that form a circle 28 of lower face plate 33 below lower face plate, and fire door pipe 11 communicates with lower hearth 30, and around the furnace internal-lining 28 and interval between the furnace outside-lining 25 constitutes intercalated water sleeve 29 down.Last intercalated water sleeve 22 communicates with the top of water containing chamber 24, and the bottom of water containing chamber 24 communicates with following water interlayer water jacket 29.
The principal character of present embodiment is that water pipe 35 is being set in fire tube 34, sees Fig. 4 and Fig. 5, and water pipe 35 is to install like this.At upper furnace 21 three upper lateral tubes 39 are installed, the two ends of last horizontal water tube 39 are welded on epipleural 37 and communicate with last intercalated water sleeve 22, three following horizontal water tubes 32 are installed in lower hearth 30, the two ends of following horizontal water tube 32 are welded on lower side panel 31 and communicate with following intercalated water sleeve 29, every upper lateral tube 39 and every lower transverse tubule 32 all have three with fire tube corresponding through hole about in the of 34, the upper end of water pipe 35 is welded on the through hole of horizontal water tube 39, and the lower end is welded on down the through hole of horizontal water tube 32, sees Fig. 6.
Another feature of present embodiment is that smoke evacuation cover 2 and had water interlayer 43 and horizontal water tank 41.Smoke evacuation cover 2 water interlayer 43 and is connected with the last water interlayer 22 of furnace outside-lining 25 and lead to.The smoke evacuation lid 2 of present embodiment is a double-decker.Smoke evacuation is covered 2 sections in perpendicular true direction and is " door " shape, smoke evacuation is covered 2 and is had shell 44 and inner casing 42, interval between shell 44 and the inner casing 42 constitutes the water interlayer 43 of the smoke evacuation lid of sealing, and the two ends of flat-shaped horizontal water tank 41 are welded on inner casing 42 outlet passes 40 and communicate with water interlayer 43, see Fig. 7.Delivery port 15 is welded on the shell 44 of smoke evacuation lid.Smoke evacuation cover 2 and is being welded and go up bent plate 46, and the upper outside of furnace outside-lining 25 is welding bent plate 52, discharges fume to cover 2 by fastening bolt 47 that is fastened on bent plate 46 and following bent plate 52 and the top that hex nut 48 is installed in furnace outside-lining 25, referring to Fig. 8.
Fastening the elbow 5 in the outside on furnace outside-lining 25 tops cover 2 fastening elbows 20 in smoke evacuation, and fastening connecting tube 6 between elbow 5 and the elbow 20 is discharged fume and covered 2 water interlayer 43 and connect with the last intercalated water sleeve 22 of furnace outside-lining and lead to, and sees Fig. 3.Elbow 20 and elbow 5 are seen Fig. 9 with the draw bail of connecting tube 6, the elbow 20 of present embodiment by screw threads for fastening at furnace outside-lining 25, elbow 5 is by covering 2 in smoke evacuation on the screw threads for fastening, the other end of bend pipe has external screw thread 57 and bell 55, the connecting tube 6 of present embodiment is the high temperature resistant PAP of using, the internal layer of connecting tube 6 and skin are that plastics, centre are aluminium, and the mouthpiece cover of connecting tube 6 is on bell 55, and external screw thread 57 tightens together the mouth of pipe and the bell 55 that tight loop 56 is screwed in connecting tube 6.
Elbow 20 also can be welded on furnace outside-lining 25, and elbow 5 also can be welded on smoke evacuation and cover 2.
Present embodiment is positioned at furnace internal-lining 28 base plate 26 is being set on base 12, the interval between base plate 26 and the base 12 constitutes end water interlayer 76, and end water interlayer 76 communicates with following intercalated water sleeve 79.
It is that water capacity chamber 24 in furnace outside-lining 2 is installed with pipe with spiral pipe 36 that present embodiment also has a feature, and the two ends of pipe with spiral pipe 36 connect with cold water inlet 16 and hot water outlet 18 respectively, hot-water supply.
Embodiment two
The structure of present embodiment is simpler than embodiment one, easier popularization.It just is installed with water pipe in the fire tube of existing vertical gas fired-boiler, see Figure 10.It comprises that chimney 58, smoke evacuation covers 59, furnace outside-lining 69, water containing chamber 70, fire tube 85, burner hearth 81 and fire door pipe 74, chimney 58 is welded on smoke evacuation and covers on 59, smoke evacuation cover 59 and is installed in the top of furnace outside-lining 69 and is tightened together by fastening bolt 63 and hex nut 64, and discharging fume to cover has insulation material 60 between 59 shells and the inner casing.Fixing return pipe 78 and fire door pipe 74 at furnace outside-lining 69, furnace outside-lining is for 69 times a base 75.Welding four blocks of epipleurals 67 in furnace outside-lining 69 inboards, the interval between furnace outside-lining 69 and the epipleural 67 constitutes goes up intercalated water sleeve 66, the upper end closed of cover 66 on the last interlayer.Epipleural is welding the upper face plate 68 of distribution through hole for 67 times in furnace outside-lining 69, smoke evacuation cover 59 times with the interior upper face plate 68 of furnace outside-lining 69 between formation upper furnace 61, fire tube 85 is being set in furnace outside-lining 69, the upper end of fire tube 85 is welded on the through hole of upper face plate 68, the lower face plate 71 of distribution through hole also is being set, and the lower end of fire tube 85 is welded on the through hole of lower face plate 71.The fire tube 85 of present embodiment has nine, and upper face plate 68 respectively has nine through holes with lower face plate 71, and nine fire tubes 85, upper face plate 68 and lower face plates 71 constitute water containing chamber 70 with furnace outside-lining 69.Lower hearth 82 is positioned at the furnace internal-lining that form a circle 81 of lower face plate 71 below lower face plate, and fire door pipe 74 communicates with lower hearth 82, and around the furnace internal-lining 81 and interval between the furnace outside-lining 69 constitutes intercalated water sleeve 79 down.Last intercalated water sleeve 66 communicates with the top of water containing chamber 70, and the bottom of water containing chamber 70 communicates with following intercalated water sleeve 79.
The principal character of present embodiment is that water pipe 86 all is being set in every fire tube 85.Water pipe 86 is to install like this.Horizontal water tube 90 on three is installed in upper furnace 61, the two ends of last horizontal water tube 90 are welded on the epipleural 67 and with last intercalated water sleeve 66 and communicate, three following horizontal water tubes 83 are installed in lower hearth 82, the two ends of following horizontal water tube 83 are welded on the lower side panel 80 and communicate with intercalated water sleeve 79 not, every go up horizontal water tube 90 and every lower transverse tubule 83 all have three with fire tube corresponding through hole about in the of 85, the upper end of water pipe 86 is welded on the through hole of horizontal water tube 90, and the lower end is welded on down the through hole of horizontal water tube 83.
Present embodiment is positioned at furnace internal-lining 81 base plate 77 is being set on base 75, the interval between base plate 77 and the base 75 constitutes end water interlayer 76, and end water interlayer 76 communicates with following intercalated water sleeve 79.
The present embodiment also water capacity chamber 70 in furnace outside-lining 69 is installed with pipe with spiral pipe 87, and the two ends of pipe with spiral pipe 87 connect with cold water inlet 84 and hot water outlet 88 respectively, hot-water supply.
The cross section of above-mentioned two embodiment such as furnace outside-lining are rectangle, also can be arranged to circle.
The gap of above-mentioned two embodiment pipe outer walls and fire tube inwall constitutes the above circular passage of 10mm.
Claims (4)
1. vertical gas fired-boiler, it comprises chimney, smoke evacuation lid, furnace outside-lining, water jacket, fire tube, water containing chamber, burner hearth and fire door pipe, chimney is welded on smoke evacuation and covers, the smoke evacuation lid is installed in the top of furnace outside-lining and tightens together with furnace outside-lining, fixing return pipe and fire door pipe at furnace outside-lining, furnace outside-lining is base down, is welding the epipleural round a circle in the furnace outside-lining inboard, interval between furnace outside-lining and the epipleural constitutes goes up intercalated water sleeve, the upper end closed of last intercalated water sleeve; Welding the upper face plate of distribution through hole under the epipleural in furnace outside-lining, constituting upper furnace between the bottom of smoke evacuation lid and epipleural, the upper face plate, fire tube is being set in furnace outside-lining, the upper end of fire tube is welded on the through hole of upper face plate; The lower face plate of distribution through hole also is being set, and the lower end of fire tube is welded on the through hole of lower face plate; Fire tube, upper face plate and lower face plate and shell constitute water containing chamber; Lower hearth is positioned at the furnace internal-lining that forms a circle below lower face plate and the lower face plate, the fire door pipe communicates with lower hearth, around the furnace internal-lining and the interval between the furnace outside-lining constitutes water interlayer cover down, and last intercalated water sleeve communicates with the top of water containing chamber, and the bottom of water containing chamber communicates with following water interlayer water jacket; It is characterized in that: water pipe is being set in fire tube, horizontal water tube in upper furnace, being installed with, the two ends of last horizontal water tube are welded on epipleural and communicate with last intercalated water sleeve, horizontal water tube down is installed in lower hearth, the two ends of following horizontal water tube are welded on the furnace internal-lining and with following intercalated water sleeve and communicate, every go up horizontal water tube and every following horizontal water tube all have with fire tube about corresponding through hole, the upper end of water pipe is welded on the through hole of horizontal water tube, the lower end is welded on down the through hole of horizontal water tube.
2. vertical gas fired-boiler according to claim 1, it is characterized in that: the smoke evacuation lid has water interlayer and horizontal water tank, the smoke evacuation lid has shell and inner casing, and the interval between shell and the inner casing constitutes water interlayer, and the water interlayer of smoke evacuation lid connects logical with the last intercalated water sleeve of furnace outside-lining; The two ends of horizontal water tank are welded on inner casing and communicate with the water interlayer of smoke evacuation lid, and delivery port is welded on the shell of smoke evacuation lid; Fastening the bend pipe in the outside on furnace outside-lining top covers also fastening bend pipe in smoke evacuation, and fastening connecting tube communicates the water interlayer of smoke evacuation lid between the bend pipe of smoke evacuation lid and the bend pipe of furnace outside-lining with the last intercalated water sleeve connection of furnace outside-lining.
3. vertical gas fired-boiler according to claim 1 and 2 is characterized in that: be positioned at furnace internal-lining on base base plate is being set, the interval between base plate and the base constitutes end water interlayer, and end water interlayer communicates with following intercalated water sleeve.
4. vertical gas fired-boiler according to claim 1 and 2 is characterized in that: the water capacity chamber in the pot chamber is installed with pipe with spiral pipe, and the two ends of pipe with spiral pipe connect with cold water inlet and hot water outlet respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010616707 CN102022821B (en) | 2010-12-22 | 2010-12-22 | Vertical gas fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010616707 CN102022821B (en) | 2010-12-22 | 2010-12-22 | Vertical gas fired boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102022821A true CN102022821A (en) | 2011-04-20 |
| CN102022821B CN102022821B (en) | 2013-04-03 |
Family
ID=43864415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010616707 Expired - Fee Related CN102022821B (en) | 2010-12-22 | 2010-12-22 | Vertical gas fired boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN102022821B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679537A (en) * | 2011-06-10 | 2012-09-19 | 王镇达 | Miniature vertical gas dual-purpose water heater |
| CN104515143A (en) * | 2013-09-30 | 2015-04-15 | 中山市兴和生物能源科技有限公司 | Combustion furnace structure of biomass combustor |
| CN105333445A (en) * | 2015-11-16 | 2016-02-17 | 临沂飞龙环保科技有限公司 | Double-layer sandwich water layer structure around and at bottom of boiler bottom slag removal chamber |
| CN106949452A (en) * | 2017-05-03 | 2017-07-14 | 温州市炫能换热设备有限公司 | Single channel spiral plate type steam machine liner and its manufacture method |
| CN109959161A (en) * | 2019-03-06 | 2019-07-02 | 上海正宏厨房设备有限公司 | A kind of heat energy recycling device of gas fired-boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679537A (en) * | 2011-06-10 | 2012-09-19 | 王镇达 | Miniature vertical gas dual-purpose water heater |
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| CN104515143A (en) * | 2013-09-30 | 2015-04-15 | 中山市兴和生物能源科技有限公司 | Combustion furnace structure of biomass combustor |
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| CN105333445A (en) * | 2015-11-16 | 2016-02-17 | 临沂飞龙环保科技有限公司 | Double-layer sandwich water layer structure around and at bottom of boiler bottom slag removal chamber |
| CN106949452A (en) * | 2017-05-03 | 2017-07-14 | 温州市炫能换热设备有限公司 | Single channel spiral plate type steam machine liner and its manufacture method |
| CN106949452B (en) * | 2017-05-03 | 2022-09-13 | 温州市炫能换热设备有限公司 | Single-channel spiral plate type steam engine inner container and manufacturing method thereof |
| CN109959161A (en) * | 2019-03-06 | 2019-07-02 | 上海正宏厨房设备有限公司 | A kind of heat energy recycling device of gas fired-boiler |
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| Publication number | Publication date |
|---|---|
| CN102022821B (en) | 2013-04-03 |
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