CN1180819A - Water curtain direct combustion boiler - Google Patents
Water curtain direct combustion boiler Download PDFInfo
- Publication number
- CN1180819A CN1180819A CN 97120238 CN97120238A CN1180819A CN 1180819 A CN1180819 A CN 1180819A CN 97120238 CN97120238 CN 97120238 CN 97120238 A CN97120238 A CN 97120238A CN 1180819 A CN1180819 A CN 1180819A
- Authority
- CN
- China
- Prior art keywords
- water
- boiler
- combustion
- dirct
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 45
- 238000012856 packing Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 29
- 239000000945 filler Substances 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
The invention discloses a water curtain direct combustion boiler which comprises a boiler body, a fire sprayer, a combustion jet burner, a mixed combustion chamber and a water collecting tank. The sprinkler arranged at the upper part of the furnace body is a fishbone-shaped branch pipe array device and can also be a spiral pipe coil device, and a packing layer is arranged below the sprinkler. The material layer is composed of ceramic or stainless steel pipe ring, tile-shaped or ball-shaped components with different shapes. Proper burners and internal circulating hot water pumps of boiler water are selected to ensure that the shower water directly contacts with flame for heat exchange, mass transfer reaches a certain amount of hot water at about 95 ℃ in the water collecting tank, and then heating hot water is provided by the tube type heat exchanger in the tank. The boiler has simple structure and heat efficiency up to 94%.
Description
The present invention relates to the improvement of normal-pressure boiler, especially a kind of water curtain dirct combustion boiler, it belongs to the heating boiler technical field.
Traditional hot-water boiler has three kinds of structures basically: pan shell type, shell and tube, shell and tubulation convolution.These boilers all are to utilize fuel to burn in burner hearth, and by steel plate, pipe transmits heat and gives the water that contacts with the steel plate pipe, makes water intensification heating or hot water or steam.This heat exchange mode can not make full use of the combustibility of fuel, because steel plate, pipe always want itself to consume a part of heat energy.In addition, fuel produces harmful substances such as SO2 in burning.These harmful substances are all arranged in the atmosphere along chimney, and this has just seriously polluted atmospheric environment.For normal-pressure hot-water boiler, it is in operation because management or plant issue stove occurs through regular meeting and carry the pressure operation, and this unsafe phenomenon will occur.
Purpose of the present invention just fruit overcomes the defective that above-mentioned boiler exists, and designs a kind of water curtain dirct combustion boiler, and it is simple that this boiler construction is wanted, and can improve the thermal efficiency of stove, saves steel, pollution abatement, and the protection atmospheric environment, and boiler operatiopn is safe and reliable.
Task of the present invention has following technical scheme to realize, developed a kind of water curtain dirct combustion boiler, it comprises: this is low for stove, stove water spray thrower, fuel injection burner, mix combustion chamber and header tank, the stove water spray thrower that is located at furnace body top is a fishbone branch tubulation device, the chief series pipe that turns on the water inlet pipe is connected the orderly branch's tubulation of arrangement respectively, is provided with several hole for water sprayings on tube wall under all tubulations; Be provided with packing layer below stove water spray thrower, this bed of material by the trickle orifice plate institute rest that is fixed in the cavity of furnace body middle and upper part, and by the tortuous capillary channel that the trickle hole on this orifice plate and all filler space form, constitutes trickle passage and exhaust gases passes jointly; On this furnace body middle part sidewall below orifice plate, be provided with the flange mouth of pipe that fuel injection burner is installed, the injection blast of this burner is in the 10-170 millimeter of water, flame temperature is at 1000-2000 ℃, and the combustion flame that this burner sprays contacts at the indoor stove water direct and under this orifice plate pouring of the mixed combustion at furnace body middle part; Be provided with stove water header tank in the furnace body bottom, be provided with tubular heat exchanger in this case, the entery and delivery port of this heat exchanger turns in the heating system by water pump; Stove water in this case turns on the water inlet pipe of stove water spray thrower by the circulation mouth of pipe and another heat-exchanger pump; The top of this spray thrower is the smoke chamber that is connected to exhaust pipe mouth.
This water curtain dirct combustion boiler, described stove water spray thrower, it can be that coil pipe by spiral of Archimedes shape constitutes, the outmost turns pipe end of this coil pipe turns on the water inlet pipe of this device on furnace body top, also establishes several hole for water sprayings on the following tube wall of this coil pipe.
This water curtain dirct combustion boiler, described hole for water spraying, its aperture is at 5-15mm, its boring rate: total hole area/tubulation axial cross section=35-42%.
This water curtain dirct combustion boiler, described stove water spray thrower, the heat-exchanger pump of its pump drainage facility select index to be: per 2.5 ten thousand kilocalories/h caloric value is equipped with 1-2m
3The discharge of/h.
This water curtain dirct combustion boiler, described trickle orifice plate, the aperture in its trickle hole is 2-10mm, its boring rate: total hole area/plate area=35-42%.
This water curtain dirct combustion boiler, described trickle orifice plate, it can be the screen formula trickle orifice plate made from perpendicular flat stainless steel, the 0.7-0.8 that all plate spacing distances of this screen are the filler nominal diameter is doubly.
This water curtain dirct combustion boiler, described packing layer, its filler can be the pipe ring spares that varies in size of acidproof stainless steel, or the parts of sheet, bulk, spherical, flight-shaped, arc saddle type, square saddle type, cannon ring; Also can be the pipe ring spare that varies in size of pottery, or the packing elements of tile, bulk, spherical, arc saddle type, square saddle type.
This water curtain dirct combustion boiler, described packing layer, the nominal diameter of its all packing elements is: 20-150mm, the thickness of whole packing layer is: the 0.5-1.5 of furnace body cavity diameter is doubly.
On the cavity wall more than this water curtain dirct combustion boiler, the trickle orifice plate of described body of heater, also can be provided with the observation window of observing packing layer top trickle layer, the viewport mirror of this window is made for the tempering heat resistant glass.
Water curtain dirct combustion boiler of the present invention, its advantage be owing to adopted fuel oil or fuel gas injection burner, and stipulated that it sprays blast in the 10-170 millimeter of water, and combustion flame is 1000-2000 ℃ technical indicator.And designed caloric value (ten thousand kilocalories)/discharge (m of the 2.5/1-2 that forms spray thrower
3) the pump drainage facility; The coupling of spray thrower and packing layer constitutes the trickle passage and the exhaust gases passes of tortuous capillary channel formula, makes that having enough intensity at the indoor thermal-flame of mixed combustion heats trickle, and can not put out by water.Form tortuous capillary channel again owing to the various filler shapes of packing layer are different, thereby can form water film type trickle passage, make the burning ember that rises to packing layer or the flue gas can be fully and the moisture film contact heat-exchanging, finally the stove coolant-temperature gage under drenching can be reached more than 95 ℃.This stove fire collection is compiled in the header tank of bottom, so that tubular heat exchanger is carried out heat exchange, makes the interior heating hot water of this device at 80-95 ℃, needs for heating system.Because water curtain directly contacts flame, the stove water that enters furnace body can be through three heat transfer process, thereby have improved the heat exchange effect, and its thermal efficiency is more than 94%.Also absorb simultaneously and dissolved the harmful substances such as SO2 that burning produces, cleaned smoke discharging and advantageously protected atmospheric environment.The flue gas that this boiler is discharged once had been less than Lin Geman, its flue gas discharge temperature＜150 ℃.Because this boiler is a smoke chamber to be opened wide to connect and amplify gas, thereby the boiler combustion operation can not produce pressure, therefore has the safe and reliable operation characteristics.This boiler furnace is simple in structure, saves steel, is example with the normal hot wooden boiler of the pan shell type of 300,000 kilocalories/h, same caloric value, and this stove only needs the 580Kg/ steel, can save steel 735Kg.
The embodiments of the invention accompanying drawings is as follows:
Fig. 1 is the structural representation of water curtain dirct combustion boiler.
Fig. 2 is the structure vertical view (the A-A view of Fig. 1) of water curtain dirct combustion boiler.
Fig. 3 is spiral yarn shaped coil pipe spray thrower structural representation.
Make the atmospheric hot-water water curtain dirct combustion boiler of 300,000 a kilocalories/h, it comprises furnace body 1, size: 800mm * 1600mm.Stove water spray thrower 5, fuel injection burner 19 mixes combustion chamber 2 and header tank 3.The stove water spray thrower 5 that this boiler is located at furnace body 1 top is fishbone branch tubulation devices, and the chief series pipe 14 that turns on the water inlet pipe 11 is connected the branch's tubulation 15 that has arrangement orderly respectively.On 15 times tube walls of all tubulations, be provided with several hole for water sprayings (not drawing among the figure).Below stove water spray thrower 5, be provided with packing layer 6, this bed of material 6 by 7 rests of trickle orifice plate that are fixed in the furnace body 1 middle and upper part cavity, and constitutes trickle passage and exhaust gases passes jointly by the tortuous capillary channel in the trickle hole 7 on this orifice plate 7 ' form with all filler space.On the furnace body 1 middle part sidewall of this orifice plate below 7, be provided with the flange mouth of pipe 4 that fuel injection burner 19 is installed.The combustion flame of this burner 19 directly contacts with the stove water that drenches the capillary shape that rains from this orifice plate 7 in the mixed combustion chamber 2 at furnace body 1 middle part and carries out heat exchange.Stove water after being heated is long-pending the remittance in the stove water header tank 3 of furnace body 1 bottom.In this water tank 3, be provided with shell and tube (coil pipe) heat exchanger 8.The entery and delivery port 12,13 of this heat exchanger 8 turns in the heating system by water pump (not drawing among the figure), uses as the heating hot water circuit.Stove water in this water tank 3 then turns on the water inlet pipe 11 of stove water spray thrower 5 by the circulation mouth of pipe 10 and another heat-exchanger pump (not drawing among the figure).The below of this spray thrower 5 also can be provided with the observation window 18 of observing packing layer top trickle layer gas, liquid contact situation to furnace body 1 cavity wall of trickle orifice plate more than 7.The viewport mirror of this form 18 is made for the tempering heat resistant glass.
The stove water spray thrower 5 that this boiler adopted, its chief series pipe is 50mm, and branch's tubulation is 30mm, and the aperture of hole for water spraying is 8mm, and hole count is: 120.The coil pipe 20 of these spray thrower 5 all right spiral of Archimedes shapes, these coil pipe 20 bores are 38mm, outmost turns is from furnace body 1 chamber wall 80mm.Also be provided with the hole for water spraying of 6mm on this coil pipe 20, its hole count is: 150.
The filler that this boiler adopted is that nominal diameter is the ceramic pipe ring of 50mm or is the spirality stainless steel substrates of 50mm.The thickness of this packing layer 6 is 640mm.
The trickle orifice plate 7 that this boiler adopted, this orifice plate 7 be provided with 2000 trickle holes 7 ', this hole 7 ' diameter is 3mm.This boiler also can adopt perpendicular flat stainless steel, and (5 * 50mm) make the screen formula trickle orifice plate (not drawing among the figure) that spacing distance is 40mm.
This boiler is owing to stove water spray thrower 5, and packing layer 6 and the effect of drenching orifice plate 7 make current become capillary rain shape and drench into mixing combustion chamber 2, at this moment, and owing to burner 19 jet flames in mixing combustion chamber 2.The blast of this flame is more than 30mm rice post height, and flame completing combustion reaches 2000 ℃.The stove water that becomes the shape of drenching with rain directly contacts with flame by mixing combustion chamber 2, and heat exchange becomes hot water or steam.Both there had been diabatic process in this process, and also existing mass transport process: SO2 to be absorbed by water finally becomes H2SO3.Gas fume after burning (comprising steam) can continue to rise along the tortuous capillary channel of all filler space of orifice plate 7 and packing layer 6, and the waste heat in this flue gas will contact with the stove current layer under drenching and carry out the secondary heat exchange.Remaining heat also can carry out three heat exchanges in the flue gas on stove fire spray thrower 5, can improve the thermal efficiency of this boiler so widely.This boiler smoke is concentrated in smoke chamber 16, through exhaust smoke outlet 17 discharging atmosphere, and its floss hole temperature＜150 ℃.Stove water in the stove water header tank 3 of this boiler recycles, and stove water constantly absorbs SO2 and forms H2SO3, when absorption is saturated, can stove water be discharged out of the furnace through blowdown pipe valve 9, sewage disposal separately on time again.This water can be used to have a bath, and health-care effect is arranged.This boiler is used for the heat-exchanger pump of boiler water circulating system and selects every 2.5/h ten thousand kilocalorie caloric values to be equipped with 1.5m
3The water pump of the discharge of/h, the working flow of promptly selecting water pump for use is 18
3/ h is to guarantee directly contact heat-exchanging consumption of water-fire.
Claims (9)
1, a kind of water curtain dirct combustion boiler, it comprises: furnace body, stove water spray thrower, fuel injection burner, mix combustion chamber and header tank, it is characterized in that: the stove water spray thrower that is located at furnace body top is a fishbone branch tubulation device, the chief series pipe that turns on the water inlet pipe is connected the orderly branch's tubulation of arrangement respectively, is provided with several hole for water sprayings on tube wall under all tubulations; Be provided with packing layer below stove water spray thrower, this bed of material by the trickle orifice plate institute rest that is fixed in the cavity of furnace body middle and upper part, and by the tortuous capillary channel that the trickle hole on this orifice plate and all filler space form, constitutes trickle passage and exhaust gases passes jointly; On this furnace body middle part sidewall below orifice plate, be provided with the flange mouth of pipe that fuel injection burner is installed, the injection blast of this burner is in the 10-170 millimeter of water, flame temperature is at 1000-2000 ℃, and the combustion flame that this burner sprays contacts at the indoor stove water direct and under this orifice plate pouring of the mixed combustion at furnace body middle part; Be provided with stove water header tank in the furnace body bottom, be provided with tubular heat exchanger in this case, the entery and delivery port of this heat exchanger turns in the heating system by water system; Stove water in this case turns on the water inlet pipe of stove water spray thrower by the circulation mouth of pipe and another heat-exchanger pump; The top of this spray thrower is the smoke chamber that is connected to exhaust pipe mouth.
2, according to the described water curtain dirct combustion boiler of claim 1, it is characterized in that: described stove water spray thrower, it can be that coil pipe by spiral of Archimedes shape constitutes, the outmost turns pipe end of this coil pipe turns on the water inlet pipe of this device on furnace body top, also establishes several hole for water sprayings on the following tube wall of this coil pipe.
3, according to claim 1 or 2 described water curtain dirct combustion boilers, it is characterized in that: described hole for water spraying, its aperture be at 5-15mm, its boring rate: total hole area/tubulation axial cross section=35-42%.
4, according to claim 1 or 2 described water curtain dirct combustion boilers, it is characterized in that: described stove water spray thrower, it is that the heat-exchanger pump selection index of drainage facility is: per 2.5 ten thousand kilocalories/h caloric value is equipped with 1-2m
3The discharge of/h.
5, according to the described water curtain dirct combustion boiler of claim 1, it is characterized in that: described trickle orifice plate, the aperture in its trickle hole are 2-10mm, its boring rate: total hole area/plate area=35-42%.
6, according to the described water curtain dirct combustion boiler of claim 1, it is characterized in that: described trickle orifice plate, it can be the screen formula trickle orifice plate made from perpendicular flat stainless steel, the 0.7-0.8 that all plate spacing distances of this screen are the filler nominal diameter is doubly.
7, according to the described water curtain dirct combustion boiler of claim 1, it is characterized in that: described packing layer, its filler can be the pipe ring spare that varies in size of acidproof stainless steel, or the parts of sheet, bulk, spherical, flight-shaped, arc saddle type, square saddle type, cannon ring; Also can be the pipe ring spare that varies in size of pottery, or the packing elements of tile, bulk, spherical, arc saddle type, square saddle type.
8, according to claim 1 or 7 described water curtain dirct combustion boilers, it is characterized in that: described packing layer, the nominal diameter of its all packing elements is: 20-150mm, the thickness of whole packing layer is: the 0.5-1.5 of furnace body cavity diameter doubly.
9, according to the described water curtain dirct combustion boiler of claim 1, it is characterized in that: on the cavity wall more than the trickle orifice plate of described body of heater, also can be provided with the observation window of observing packing layer top trickle layer, the viewport mirror of this window is made for the tempering heat resistant glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97120238 CN1062950C (en) | 1997-11-04 | 1997-11-04 | Water curtain direct combustion boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97120238 CN1062950C (en) | 1997-11-04 | 1997-11-04 | Water curtain direct combustion boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1180819A true CN1180819A (en) | 1998-05-06 |
| CN1062950C CN1062950C (en) | 2001-03-07 |
Family
ID=5175829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97120238 Expired - Fee Related CN1062950C (en) | 1997-11-04 | 1997-11-04 | Water curtain direct combustion boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1062950C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846359A (en) * | 2010-04-23 | 2010-09-29 | 张亚玉 | Downwind smoke contact heat exchange type gas heating furnace |
| CN101876431A (en) * | 2010-06-27 | 2010-11-03 | 王光树 | Direct-fired boiler |
| CN103017328A (en) * | 2012-12-31 | 2013-04-03 | 宁波鸿图工业设计有限公司 | Combustion and heat exchange system of heating equipment |
| CN105509309A (en) * | 2016-01-25 | 2016-04-20 | 大庆市斯麦森科技有限公司 | Efficient combustion vertical hot-water boiler with core tube |
| CN106338143A (en) * | 2016-10-24 | 2017-01-18 | 徐士伦 | Normal-pressure hot water boiler with retractable fire tube externally arranged |
-
1997
- 1997-11-04 CN CN 97120238 patent/CN1062950C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846359A (en) * | 2010-04-23 | 2010-09-29 | 张亚玉 | Downwind smoke contact heat exchange type gas heating furnace |
| CN101876431A (en) * | 2010-06-27 | 2010-11-03 | 王光树 | Direct-fired boiler |
| CN101876431B (en) * | 2010-06-27 | 2013-03-13 | 王光树 | Direct-fired boiler |
| CN103017328A (en) * | 2012-12-31 | 2013-04-03 | 宁波鸿图工业设计有限公司 | Combustion and heat exchange system of heating equipment |
| CN105509309A (en) * | 2016-01-25 | 2016-04-20 | 大庆市斯麦森科技有限公司 | Efficient combustion vertical hot-water boiler with core tube |
| CN106338143A (en) * | 2016-10-24 | 2017-01-18 | 徐士伦 | Normal-pressure hot water boiler with retractable fire tube externally arranged |
| CN106338143B (en) * | 2016-10-24 | 2023-06-20 | 大庆市豪迈德科技有限公司 | External contraction and expansion fire tube type normal pressure hot water boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1062950C (en) | 2001-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2452906C2 (en) | Boiler for heating and hot water supply, boiler heat exchanger, buffer reservoir of boiler and method of boiler operation | |
| CN2694120Y (en) | Exhaust incinerator | |
| CN1062950C (en) | Water curtain direct combustion boiler | |
| CN101307951B (en) | Water fire direct changing type highly effective multipurpose hot water units | |
| CN201014541Y (en) | Numerical control environment-protection energy-saving boiler | |
| CN106369816A (en) | Direct-heating hot water boiler | |
| CN2308843Y (en) | Water curtain direct combustion boiler | |
| CN206191896U (en) | Directly -heated boiler | |
| CN100470162C (en) | Gas-fired water heating boiler | |
| CN201165514Y (en) | Negative-pressure type energy-saving environment-protective coal gas producer and coal gas purifier | |
| KR20020001465A (en) | Condensing Type Heat Exchanger of Gas Boiler | |
| CN208735899U (en) | Energy-saving ultralow nitrogen vertical boiler | |
| RU45510U1 (en) | CONDENSATION TYPE GAS BOILER | |
| CN201032260Y (en) | Energy-saving environment protection water heating boiler | |
| CN2881436Y (en) | Gas water boiler | |
| CN1076464C (en) | Normal-pressure oil (gas)-burning water-heating boiler | |
| CN110220305A (en) | A kind of full-heated type gas normal-pressure water heater | |
| CN215864025U (en) | Waste heat recovery device and low-nitrogen energy-saving central water heater | |
| CN2238378Y (en) | Water spray boiler for controlling superheat temp | |
| CN100526747C (en) | Fume heating furnace with fume and medium counter flow | |
| CN2253442Y (en) | Oil burning atmospheric hot-water steam boiler | |
| CN208846735U (en) | Gas Infrared heats wall-hung boiler and module furnace | |
| CN209355482U (en) | A kind of less boiler with water inlet heat absorption function | |
| CN208794733U (en) | A kind of direct-fired total heat recovery condensation hot water special furnace of ultralow nitrogen | |
| CN2359566Y (en) | Horizontal gas, oil burning boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 12 of the detailed rules for the implementation of the patent law: 97120238.9 of the invention patents in the current issue of authorization announcement, and at the same time corresponding to the 97243536 utility model patent to be given up, and in the 17 volume of the 10 issue of the new type of communique on the patent right to abandon the announcement. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |