CN1670431A - Three return stroke half fire coal, fuel oil and gas-fired smokeless boiler - Google Patents
Three return stroke half fire coal, fuel oil and gas-fired smokeless boiler Download PDFInfo
- Publication number
- CN1670431A CN1670431A CN 200510065849 CN200510065849A CN1670431A CN 1670431 A CN1670431 A CN 1670431A CN 200510065849 CN200510065849 CN 200510065849 CN 200510065849 A CN200510065849 A CN 200510065849A CN 1670431 A CN1670431 A CN 1670431A
- Authority
- CN
- China
- Prior art keywords
- boiler
- arch
- vertical
- fuel oil
- furnace
- 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.)
- Pending
Links
Images
Landscapes
- Solid-Fuel Combustion (AREA)
Abstract
This invention relates to a three return travel half coal, oil and gas fuel smokelessness boiler. It includes boiler external cylinder, inner bag shell, multiple horizontal siphonal areas, water cold wall pipe, and combination furnace arch and fire grate. Its feature is that annular secondary air bellows and arched first air bellows are fixed under fire grate, the secondary air bellow is interconnected to vertical quadric air manifold set along furnace outer wall, semilunar horizontal air pipe is set under arched high temperature fume outlet at both sides of furnace. The combination furnace arch is consisted by yi form up furnace arch, inverse L form middle arch and concave down arch. The three arches are all formed by combination of horizontal cleet water cover and vertical cleet water cover and plugging cleet water cover connecting through fire bricks, and malpositioned in inner bag shell, three return travel flue is formed under up furnace arch. Both sides of up parts of inner bag shell shrink entad to form two segment special form barrel of vertical upright faces. Up part horizontal pipe is put up between two vertical upright faces. Bituminous coal smokelessness burning technique and inner furnace smoke prevention and dust control technique is formed by the boiler in this invention and air distribution burning technique and multifunction furnace arch structure. Coal cleanliness burning smokelessness boiler is formed by the combination of bituminous coal smokelessness burning technique and three return half coal process. Its heat efficiency is high when running longtime, energy saving effect is great, discharging of polluting matter is low, and the oil and gas fuel boiler is achieved.
Description
Technical field
The present invention relates to the civil boiler technical field, specifically relate to a kind of three return stroke half fire coals, fuel oil, gas smokeless boiler.
Background technology
At present, vertical boiler and common coal-burning smoke-less boiler smoke flow process are straight-line, and flue gas flow rate is low, flow process is short, the exhaust gas temperature height, particularly move a period of time after, main heating surface water side scaling, and be difficult to remove, when fume side is overworked ash and knot black dirt, promptly cause heat-transfer effect very poor behind heating surface scaling and the black dirt, the boiler operatiopn period average thermal efficiency is very low, waste of fuel is surprising, and has caused tea-bath furnace to have only time about 2 years service life.
Chinese patent " coal clean combustion the vertical boiler " (patent No.: 03237649.9) provide a kind of compound chimney arch in upper, middle and lower of arranging orderly horizontal water tube and the composition of the buffler between the shutoff horizontal water tube that utilizes, and air distribution system, a secondary air distribution being arranged on the fire grate below are strong combustion technology and the interior efficiently smoke dedusting technology of forming of stove, the interior smoke and dust eliminating technology of stove of handwarmer and the technology of economizing on coal have been realized, but, in actual manufacture process, this boiler but exposes following defective and deficiency:
1) combined furnace arch in this technology, be that the upper, middle and lower chimney arch all adopts horizontal water tube and buffler to form, this structure setting has still continued the easy scaling of main heating surface of horizontal water tube vertical boiler for many years, and be difficult to remove drawback, cause heat transfer efficiency poor, the thermal efficiency is low during the boiler operatiopn, and influences the safe operation of boiler;
2) the secondary aid distributing pipe of this technology is located at inboard wall of burner hearth, is very easily burnt out by high-temperature flue gas, influences its long-term safety and uses;
3) manufacturing cost height.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, a kind of structure uniqueness is provided, easy to manufacture, with low cost, can make fuel completing combustion, flue gas cleaning discharging, heating surface is less scaling, dust not, and long-time running all can reach three return stroke half fire coals, fuel oil, the gas smokeless boiler of design thermal efficiency.
The objective of the invention is to be achieved through the following technical solutions:
A kind of three return stroke half fire coals, fuel oil, gas smokeless boiler, comprise boiler urceolus, inner bag shell, many horizontal water tubes district, water screen tube, combined furnace arch and fire grate, it is characterized in that: described fire grate below is equipped with annular secondary wind bellows and arc wind bellows successively, these annular secondary wind bellows communicate with the vertical secondary aid distributing pipe of placing along hearth outer wall, and the horizontal airduct of crescent is located on the hearth outer wall of arc high temperature exhanst gas outlet below, burner hearth both sides; Described combined furnace arch by chimney arch on the in-line, fall L shaped under chimney arch and the spill chimney arch form, above-mentioned upper, middle and lower chimney arch all is to be formed by connecting by horizontal water holding jacket and the combination of vertical water holding jacket and the refractory brick between the clip occluder water jacket, and the dislocation be arranged in the inner bag shell, constitute three backhaul flues at last chimney arch with the lower part; Inwardly shrink both sides, described inner bag shell top, forms the special-shaped barrel that two sections vertical vertical surfaces are formed, and top horizontal water tube frame is between two vertical vertical surfaces;
Above-mentioned vertical secondary aid distributing pipe and the horizontal airduct of crescent are welded on the hearth outer wall, are equipped with the air distribution outlet of φ 4～φ 20 circular holes on the hearth wall corresponding with it, and the vertical surface of above-mentioned arc wind bellows is provided with the air distribution outlet of φ 40～φ 150 circular holes;
The fume side wall of the water holding jacket of above-mentioned upper, middle and lower chimney arch is provided with the hydrazine sheet that is used to increase the flue gas heat exchange area;
Be provided with the stay bolt plate in the water holding jacket of described upper, middle and lower chimney arch;
The described horizontal lower wall surface of chimney arch down is hung with porous flame retardant coating and wire netting overlapping layers successively;
Described boiler urceolus is provided with fire door, scale removal hand hole, shoot door and burner interface;
Be provided with the current guide plate between described boiler urceolus and the inner bag shell;
Described inner bag shell diameter is during greater than 2 meters, and the type of furnace can adopt the combining structure of the two inner bags of single urceolus.
Technological innovation of the present invention is mainly reflected in the following aspects:
1. the combined furnace arch in the present technique is made up of a plurality of difform water holding jackets, wherein chimney arch is made of 1 horizontal water holding jacket of in-line on the in-line, chimney arch is made of after with the refractory brick shutoff two cover horizontal water holding jackets of in-line and the vertical water holding jacket of two covers in the inverted "L" shaped, chimney arch is formed by the refractory brick shutoff by 2 " L " clevis water jackets under the spill, the chimney arch manufacturing was more simple under such structural design made and itself reaches with regard to very complicated middle chimney arch, and the rigidity and the intensity that can keep the inner bag shell after perforate is several sections on the inner bag shell, and the assembling between combined furnace arch and inner bag shell is more easy, the assembly precision height;
2. present technique adopts chimney arch on the in-line, the common combined furnace arch of forming of chimney arch under chimney arch and the spill in the inverted "L" shaped, started the unique texture of vertical boiler flue gas flow three return stroke halfs, 2 times of prolong smoke flow processs, improve 3 times of flue gas flow rates, this design makes flue gas in flow process, constantly change flow velocity and direction, flying dust then separates with flue gas under the effect of inertia force and gravity, falling is piled up at the upper surface of chimney arch, reach dedusting function, and this three return stroke half flue gas flows can keep the strong fired state of voltage stabilizing in the burner hearth effectively, combustible is fully burnt, make flying dust be difficult for the burner hearth that flies out, when guaranteeing normal combustion smoke evacuation colourless, and it is colourless also to discharge fume at coal with when poking fire; Improved at above-mentioned this flue gas flow rate under 3 times the situation, the fume side heating surface is difficult for dust, is difficult for connecing dirt, and therefore, boiler all can keep the higher thermal efficiency at run duration, saves a large amount of fuel costs; Simultaneously because present technique is the main heating surface of boiler with water holding jacket formula combined furnace arch, such structure has effectively been improved current poker spare in the stove, alleviate scaling on the water side heat-transfer area, and because the water holding jacket inner chamber is unimpeded, in boiler urceolus appropriate location several scale removal hand holes are set, just incrustation scale can easily be removed, so all design thermal efficiency can be reached during the boiler operatiopn;
3. present technique also is provided with the hydrazine sheet on the fume side wall of chimney arch, thereby has increased the heat transfer area of fume side, more help the water in the fume side heat transferred water holding jacket, thereby reduced exhaust gas temperature effectively, raising by a relatively large margin the thermal efficiency;
4. after present technique is taken in certain yardstick with both sides, cylindrical shape inner furnace top (going up chimney arch with top), form the special-shaped barrel that 2 sections vertical vertical surfaces are formed, this design can improve goes up the flue gas flow rate of chimney arch with top, reduce flue gas circulation stagnant area, make the horizontal water tube on top also be difficult for dust, the whole heating surface of boiler all is under the good condition, compares, can improve the thermal efficiency 5%～10% with other boiler of same heating surface; Simultaneously several horizontal water tubes are located between 2 vertical plane, make that the assembling of horizontal water tube is more easy; Present technique also is provided with the current guide plate in the water holding jacket of urceolus and inner bag shell, make the more many horizontal water tubes inhalant region that flows to top of water of bottom water holding jacket, makes the water circulation in the water holding jacket more reasonable;
5. present technique is behind the water holding jacket sectional making, and size decreases can be provided with several stay bolt plates in the water holding jacket inner chamber, can improve rigidity, bearing capacity and the reliability of water holding jacket like this, but water holding jacket reduces the boiler cost in factory's seriation, finished product production;
6. present technique is designed to cylindrical shape with the secondary air box under the fire grate, No. one time bellows are designed to arc case, on the vertical surface of arc case, open 2～6 air ports, simple in structure like this, make easily, a wind configuration is even, and it is even to help whole grate surface air distribution, sufficient combustion, and can be suitable for the boiler of all size size; Simultaneously vertical and crescent secondary aid distributing pipe are placed on the cylindrical shape burner hearth wall outside, promptly vertical and crescent secondary aid distributing pipe is arranged in the water holding jacket of inner casing and shell, and secondary air channel can not burnt out by high-temperature flue gas, the use of energy long-term safety;
7. the secondary wind air distribution to burner hearth divides two levels in the present technique: first level be by vertical secondary aid distributing pipe on perforate to the burner hearth air distribution, replenish the deficiency of a wind, to guarantee the required oxygen-supplying amount of second-time burning in the burner hearth, and make thermal-flame formation eddy flow in the burner hearth, improve the degree of filling of furnace flame, hydrocarbon in the flame, CO, it is abundant that coke granule and O2 fully stir mixed combustion, prolonged burning time simultaneously, make furnace flame abnormal combustion fierceness, combustible is after-flame fully, improve the combustion intensity and the combustion efficiency of burner hearth, reduced the burner hearth flying dust; Second level is by 2 horizontal airducts of crescent below 2 that the are arranged on the burner hearth both sides arc high temperature exhanst gas outlets, dry from burner hearth two side direction burner hearths, make the interior high-temperature flue gas of burner hearth rise to the heat insulation layer chimney arch face and the resistant to elevated temperatures wire netting overlapping layers of alveolate texture, flue gas is after wire netting overlapping layers bottom horizontal flow sheet, flow out from 2 arc high temperature exhanst gas outlets of upper furnace, this design can make the abundant after-flame of the combustible in the high-temperature flue gas, most of flying dust is retained in above the wire netting overlapping layers, be that the horizontal airduct air distribution of crescent cooperates with multi-functional chimney arch down, constitute smoke and dust eliminating technology in the stove;
8. present technique is established water screen tube on the high-temperature flue gas outlet top of burner hearth both sides, based on radiation heat transfer, heat exchange efficiency is 2～3 times of top horizontal water tube heat convection efficient, can save the horizontal water tube consumption, and don't influence the hot environment of burner hearth, and can improve water circulating effect in the stove effectively;
9. the equipped burner of present technique is oil-burning gas-fired boiler, has realized multi-use, and it can use pluralities of fuels such as piece powdery mixing bituminous coal, moulded coal, oil and gas, more accords with the demands of the market.
Technical characterstic of the present invention is: the air distribution combustion technology combines with multi-functional chimney arch and has constituted smoke and dust eliminating technology in bituminous coal smokeless combustion technology and the stove; Bituminous coal smokeless combustion technology perfectly combines with three return stroke half flue gas flows and constituted coal clean combustion less boiler, long-time running thermal efficiency height, and energy-saving effect is very outstanding, and pollutant emission is low, has really reached the effect of fuel oil, gas fired-boiler.
The type of furnace of the present invention can be used as novel waste heat boiler, gas fired furnace.
Description of drawings
Fig. 1 is the structural representation of the present invention's three return stroke half fire coals, fuel oil, gas smokeless boiler, and wherein a is depicted as the flue gas flow circuit;
Fig. 2 is that A-A among Fig. 1 is to cutaway view;
Fig. 3 is that A among Fig. 1 is to view;
Fig. 4 is that B-B among Fig. 1 is to cutaway view;
Fig. 5 is that C-C among Fig. 1 is to cutaway view.
The specific embodiment
Three return stroke half fire coals of the present invention, fuel oil, gas smokeless boiler, comprise the boiler body of forming by boiler urceolus 1 and inner bag shell 2, described boiler body bottom is equipped with fire grate 5, this fire grate 5 is divided into upper furnace space region and lower furnace basal seat area with the lower space of boiler body, annular secondary wind bellows 6 and arc wind bellows 7 from top to bottom are installed successively in the furnace base district, and annular secondary wind bellows 6 all link to each other with the blower fan 18 of boiler outside with arc wind bellows 7; Have 2～6 air distribution outlets 15 on the vertical surface of above-mentioned arc wind bellows 7, air distribution outlet 15 is the circular hole of φ 40～φ 150; Annular secondary wind bellows 6 communicate with the vertical secondary aid distributing pipe 8 of several differing heights of placing along hearth outer wall, two horizontal airducts 9 of crescent are located on the hearth outer wall of arc high temperature exhanst gas outlet 20 belows, burner hearth both sides, vertical secondary aid distributing pipe 8 tops, all have several air distribution outlets 15 on vertical secondary aid distributing pipe 8 and the horizontal airduct 9 of crescent, and constituting the secondary air distribution system of present technique with annular secondary wind bellows 6, this air distribution outlet 15 is the circular hole of φ 4～φ 20.
Combined furnace arch is located at the burner hearth top, described combined furnace arch is by chimney arch on the in-line 10, fall L shaped under chimney arch 11 and the spill chimney arch 12 form, wherein going up chimney arch 10 is to be made of a horizontal water holding jacket of in-line, middle chimney arch 11 is to be formed with the refractory brick shutoff by horizontal water holding jacket of in-line and vertical water holding jacket, 12 of following chimney arch are to be formed by the refractory brick shutoff by 2 L shaped water holding jackets, on above-mentioned, in, following chimney arch dislocation is arranged in the inner bag shell 2, constitute three backhaul flues at last chimney arch 10 with the lower part, and last, in, the fume side wall of the water holding jacket of following chimney arch is provided with the hydrazine sheet 13 that is used to increase the flue gas heat exchange area, is hung with porous flame retardant coating (refractory brick or seat clay) and wire netting overlapping layers on the horizontal lower wall surface of following chimney arch 12 successively; For rigidity, bearing capacity and the reliability that improves water holding jacket, present technique also is provided with the stay bolt plate in water holding jacket; Conduct heat for enhanced rad simultaneously, present technique is also established water screen tube 4 on the high-temperature flue gas outlet top of burner hearth both sides.
The present invention shrinks inner bag shell 2 tops to both sides, form the special-shaped barrel that two sections vertical vertical surfaces are formed, and horizontal water tube 3 district's framves in top both can improve flue gas flow rate on two sections vertical vertical surfaces, make that again the installation of horizontal water tube is more easy.The present invention also is provided with the current guide plate in the water holding jacket of urceolus 1 and inner bag shell 2, make the more many horizontal water tubes inhalant region that flows to top of water of bottom water holding jacket, makes the water circulation in the water holding jacket more reasonable.
The present invention offers shoot door 19 and scale removal hand hole 16 on the appropriate location of boiler urceolus 1, be used for regular dust stratification and incrustation scale, and fire door 21 is located on the boiler urceolus 1 of burner hearth correspondence; On boiler urceolus 1, be provided with simultaneously the burner interface 14 that is used to install fuel oil, combustion gas.
When inner bag shell 2 diameters during greater than 2 meters, the type of furnace of present technique also can adopt the combining structure of the two inner bags of single urceolus.
Claims (8)
1. a return stroke half fire coal, fuel oil, gas smokeless boiler, comprise boiler urceolus (1), inner bag shell (2), many horizontal water tubes (3) district, water screen tube (4), combined furnace arch and fire grate (5), it is characterized in that: described fire grate (5) below is equipped with annular secondary wind bellows (6) and arc wind bellows (7) successively, these annular secondary wind bellows (6) communicate with the vertical secondary aid distributing pipe of placing along hearth outer wall (8), and the horizontal airduct of crescent (9) is located on the hearth outer wall of the arc high temperature exhanst gas outlets in burner hearth both sides (20) below; Described combined furnace arch by chimney arch on the in-line (10), fall L shaped under chimney arch (11) and the spill chimney arch (12) form, above-mentioned upper, middle and lower chimney arch all is to be formed by connecting by horizontal water holding jacket and the combination of vertical water holding jacket and the refractory brick between the clip occluder water jacket, and the dislocation be arranged in the inner bag shell (2), constitute three backhaul flues at last chimney arch (10) with the lower part; Inwardly shrink described inner bag shell (2) both sides, top, forms the special-shaped barrel that two sections vertical vertical surfaces are formed, and top horizontal water tube (3) frame is between two vertical vertical surfaces.
2. by the described three return stroke half fire coals of claim 1, fuel oil, gas smokeless boiler, it is characterized in that: above-mentioned vertical secondary aid distributing pipe (8) and the horizontal airduct of crescent (9) are welded on the hearth outer wall, be equipped with the air distribution outlet (15) of φ 4～φ 20 circular holes on the hearth wall corresponding with it, the vertical surface of above-mentioned arc wind bellows (7) is provided with the air distribution outlet (15) of φ 40～φ 150 circular holes.
3. by the described three return stroke half fire coals of claim 1, fuel oil, gas smokeless boiler, it is characterized in that: the fume side wall of the water holding jacket of above-mentioned upper, middle and lower chimney arch is provided with the hydrazine sheet (13) that is used to increase the flue gas heat exchange area.
4. press claim 1 or 3 described three return stroke half fire coals, fuel oil, gas smokeless boiler, it is characterized in that: be provided with the stay bolt plate in the water holding jacket of described upper, middle and lower chimney arch.
5. press claim 1 or 3 described three return stroke half fire coals, fuel oil, gas smokeless boiler, it is characterized in that: the described horizontal lower wall surface of chimney arch (12) down is hung with porous flame retardant coating and wire netting overlapping layers successively.
6. by the described three return stroke half fire coals of claim 1, fuel oil, gas smokeless boiler, it is characterized in that: described boiler urceolus (1) is provided with fire door (21), scale removal hand hole (16), shoot door (19) and burner interface (14).
7. by the described three return stroke half fire coals of claim 1, fuel oil, gas smokeless boiler, it is characterized in that: be provided with current guide plate (17) between described boiler urceolus (1) and the inner bag shell (2).
8. by the described three return stroke half fire coals of claim 1, fuel oil, gas smokeless boiler, it is characterized in that: described inner bag shell (2) diameter is during greater than 2 meters, and the type of furnace can adopt the combining structure of the two inner bags of single urceolus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510065849 CN1670431A (en) | 2005-04-15 | 2005-04-15 | Three return stroke half fire coal, fuel oil and gas-fired smokeless boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510065849 CN1670431A (en) | 2005-04-15 | 2005-04-15 | Three return stroke half fire coal, fuel oil and gas-fired smokeless boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1670431A true CN1670431A (en) | 2005-09-21 |
Family
ID=35041793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510065849 Pending CN1670431A (en) | 2005-04-15 | 2005-04-15 | Three return stroke half fire coal, fuel oil and gas-fired smokeless boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1670431A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776159A (en) * | 2014-02-15 | 2014-05-07 | 魏银先 | Stereoscopic burning smoke fuming long-stroke heat transfer type coal-fired boiler |
| CN105841142A (en) * | 2016-05-24 | 2016-08-10 | 大震锅炉工业（昆山）有限公司 | Efficient low-heating-value gas combustion boiler |
| CN113606778A (en) * | 2021-07-23 | 2021-11-05 | 李志旭 | Energy-saving boiler |
-
2005
- 2005-04-15 CN CN 200510065849 patent/CN1670431A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776159A (en) * | 2014-02-15 | 2014-05-07 | 魏银先 | Stereoscopic burning smoke fuming long-stroke heat transfer type coal-fired boiler |
| CN105841142A (en) * | 2016-05-24 | 2016-08-10 | 大震锅炉工业（昆山）有限公司 | Efficient low-heating-value gas combustion boiler |
| CN113606778A (en) * | 2021-07-23 | 2021-11-05 | 李志旭 | Energy-saving boiler |
| CN113606778B (en) * | 2021-07-23 | 2022-09-20 | 中粮屯河伊犁新宁糖业有限公司 | Energy-saving boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101294770A (en) | Crucible furnace for alloy melting and heat preservation | |
| CN1670431A (en) | Three return stroke half fire coal, fuel oil and gas-fired smokeless boiler | |
| CN201443863U (en) | Energy-saving environment-friendly boiler | |
| CN2797965Y (en) | High efficiency energy-saving environmental-protection type boiler | |
| CN202013015U (en) | Vertical half gas positive burning heating boiler | |
| CN2529133Y (en) | Hanging bladder type environmental protection energy-saving boiler | |
| CN201434501Y (en) | Hanging furnace baffle type coal burning semi-gasification environment-protective and energy-saving boiler | |
| CN2733248Y (en) | Novel hot-water boiler | |
| CN201522093U (en) | Coal-to-gas environment-friendly energy-saving boiler | |
| CN1284954C (en) | Coal-fired water heating furnace | |
| CN201852075U (en) | Novel intelligent normal-pressure energy-saving boiler | |
| CN2286281Y (en) | Vertical double-chamber combustion coal staggered water-tube boiler | |
| CN2692574Y (en) | Horizontal atmospheric water heating boiler | |
| CN2660320Y (en) | Verticle boiler to burn coal in clean way | |
| CN2636084Y (en) | Double-grate vertical counter-combustion boiler | |
| CN2349502Y (en) | Smokeless coal boiler capable of inhibiting nitrogen oxide emission by adding coal at middle part and buring at two sides | |
| CN201081400Y (en) | Indirect air-flow hot-blast stove | |
| CN218237428U (en) | Split gas chamber combustion furnace | |
| CN2559889Y (en) | Coal and gas integral clean combustion boiler | |
| CN2131018Y (en) | Expansion furnace type normal pressure boiler with two fire grates | |
| CN2197567Y (en) | Horizental non-pressure boiler | |
| CN2906448Y (en) | Ternary-burning normal-pressure coal-burning hot water boiler | |
| CN208253542U (en) | A kind of list drum longitudinal Water-Fire Tube Shell Boilers | |
| CN2637905Y (en) | Smoke-removing energy-saving boiler | |
| CN2625731Y (en) | Waste heat recovery type molded coal boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |