CN105091320A - CWS (Coal Water Slurry) hot water boiler system - Google Patents
CWS (Coal Water Slurry) hot water boiler system Download PDFInfo
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- CN105091320A CN105091320A CN201410202214.7A CN201410202214A CN105091320A CN 105091320 A CN105091320 A CN 105091320A CN 201410202214 A CN201410202214 A CN 201410202214A CN 105091320 A CN105091320 A CN 105091320A
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Abstract
The invention relates to a CWS (Coal Water Slurry) hot water boiler system. The CWS hot water boiler system is characterized in that four corners of a combustion chamber are all provided with low nitrogen type combustors specially using CWS; refractory belts are additionally arranged at the peripheries of elevation sections of CWS spraying nozzles of the combustors; the lower ends of water walls stretch downwards to form an ash cooling hopper; the upper end of one water wall at the rear side of the combustion chamber stretches into and protrudes out of a furnace to form a furnace arch; the furnace arch stretches upwards to form two branches, one of the branches vertically and upwards enters a collection box, and a film type water wall is formed by the other branch so as to form an oblique furnace bottom of the bottom part of a horizontal flue; one water wall at the front side of the combustion chamber stretches backwards to form a rear roof tube. The CWS hot water boiler system disclosed by the invention has the following advantages that (1) CWS fuel is creatively used on a large-capacity hot water boiler; (2) ignition and stable combustion of the boiler during low load are ensured; (3) water circulation of the boiler is forced circulation, simplicity and reliability are obtained, the four water walls at the front side, the rear side, the left side and the right side of the combustion chamber are risen at one step, the temperature is uniform and reasonable, the temperature deviation is reduced, and the combustion stability is ensured.
Description
Technical field
The present invention relates to a kind of water-coal-slurry hot-water boiler system.
Background technology
Large Copacity hot-water boiler conventional in prior art adopts fire coal or combustion gas usually, coal is as the main heating energy, its environmental problem caused is on the rise, and though natural gas is a kind of clean, high-quality, efficiently boiler oil, effectively can solve the problem of environmental pollution that boiler fired coal causes, but due to China's natural gas resource-constrained, heating natural gas consumption is still limited by very large, and the operating cost of firing natural gas boiler is very high simultaneously.
Water-coal-slurry is a kind of novel coal-based cleaning liquid fluid fuel, and it has and stores like oil phase, carries and combustion characteristics.Water-coal-slurry belongs to clean fuel, be listed in the clean resources project of state key development, the environmental requirement of most area can be met, in the area of natural gas resource deficiency, use novel coal derived fuel---water-coal-slurry replaces the direct combustion of coal, can solve the contradiction between environmental pollution and people's lives and economic development of instantly giving prominence to very much.But the current general capacity of combusting coal water slurry hot-water boiler is less, large-scale heat supply network needs to be equipped with multiple stage low capacity boiler, and regulates heat supply network load by the start and stop stove of multiple stage boiler, Load Regulation ability; The low capacity boiler phenomenons such as also ubiquity combustion instability, incomplete combustion, easily coking, the thermal efficiency is low.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides a kind of jumbo water-coal-slurry hot-water boiler system, and the present invention's adopted technical scheme of dealing with problems is: the structure of water-coal-slurry hot-water boiler comprises burner, burner hearth, economizer, Horizontal air preheater, drum, wall with refractory lining, refracto, water-cooling wall, furnace hopper, furnace arch, furnace nose, header, oblique furnace bottom, rear roof tube, higher level's economizer import header, subordinate's economizer exit header, distribute header, lower header, upper collecting chamber, is characterized in that the cross section of burner hearth is for square, is provided with the burner of low nitrogen type dedicated water coal slurry, has additional wall with refractory lining, refracto around burner water-coal-slurry spout absolute altitude section, before burner hearth at four angles place of burner hearth, after, left, right wall is made by water-cooling wall, burner hearth is full film type wall hermetically-sealed construction, the lower end of water-cooling wall extends to form furnace hopper downwards, water-cooling wall upper end on rear side of burner hearth extends outstanding formation furnace arch, furnace nose in stove, furnace arch, furnace nose upwards extends to form two-way, and wherein a road enters header vertically upward, and another road composition fin panel casing forms the oblique furnace bottom bottom horizontal flue, roof tube after water-cooling wall on front side of burner hearth extends back and forms, economizer and Horizontal air preheater are in intersecting two-staqe fixing.
Described water-coal-slurry hot-water boiler system, it is characterized in that the burner of the low nitrogen type dedicated water coal slurry that four angles of burner hearth are arranged is that quadrangle tangential circle is arranged, the quantity of burner is four.
Described water-coal-slurry hot-water boiler system, it is characterized in that wall with refractory lining, refracto is that Fire and abrasion resistant material is made, the thickness of wall with refractory lining, refracto is 70-95 millimeter.
Water-coal-slurry hot-water boiler is furnished with four low nitrogen type dedicated water coal-slurry burners in the corner of burner hearth, every platform burner has three, upper, middle and lower water-coal-slurry spout, can ensure separate unit boiler capacity reach 58MW and more than, meet the heat demand of large-scale heat supply network; Burner quadrangle tangential circle is arranged simultaneously, effectively improves traditional direct light type layout and easily water-coal-slurry is ejected into the coking that furnace wall cooling causes.The high water-cooled furnace of square sectional, around burner water-coal-slurry spout absolute altitude section, set up wall with refractory lining, refracto, its material is Fire and abrasion resistant material, thickness is 70-95 millimeter, wall with refractory lining, refracto set up the temperature that effectively improve combustion zone, make water-coal-slurry accelerate catch fire, flameholding.The design of blast furnace hearth makes water-coal-slurry and the flue gas time of staying in burner hearth longer, and cool water mixture burning is more abundant, and the lime-ash after water-coal-slurry combustion is more cooled in infall process, effectively reduces the coking of bottom furnace hopper, the possibility of slagging scorification.Considerably reduce the generation of NOx simultaneously, play good emission reduction effect.Arrange two-stage air preheater in tail vertical well, cold air can be heated to more than 300 DEG C, hot-air effectively stabilizes the burning of water-coal-slurry, and improve the ability that burner regulates load, boiler controller system can stable operation under the load of minimum 50%.
The thermal efficiency of water-coal-slurry hot-water boiler system can reach more than 90%, using a 58MW hot-water boiler as embodiment, under equal water-coal-slurry consumption, and can the area of heat-supply service of many confessions 250,000 square metres than the low capacity hot-water boiler of 4 14MW.Boiler water cycle is forced circulation, simple, reliable, and the burner hearth disposable rising of four sides water-cooling wall all around, homogeneous temperature is reasonable, reduces temperature deviation, ensure that the stability of burning.
The present invention has the following advantages: (1), creatively coal water slurry fuel is used on Large Copacity hot-water boiler; (2), boiler furnace structure and low nitrogen type dedicated water coal-slurry burner organically combine, choose more suitable hot-water boiler Thermal load of cross-section and volume heat load, ensure the igniting of boiler when underload and steady combustion; (3), boiler water cycle is forced circulation, simple, reliable, the burner hearth disposable rising of four sides water-cooling wall all around, and homogeneous temperature is reasonable, reduces temperature deviation, ensure that the stability of burning; (4), adopt the air preheater of horizontal in-line arrangement, air level in pipe is washed away, flue gas vertically washes away pipe is outer, make the deashing of boiler more simple and convenient, the augmentation of heat transfer of guarantee heating surface.
Accompanying drawing explanation
Fig. 1: embodiment of the present invention structural representation.
Fig. 2: embodiment of the present invention plan structure schematic diagram.
In figure: burner 1, burner hearth 2, economizer 3, Horizontal air preheater 4, drum 5, wall with refractory lining, refracto 6, water-cooling wall 7, furnace hopper 8, furnace arch, furnace nose 9, header 10, tiltedly furnace bottom 11, rear roof tube 12, higher level's economizer import header 13, subordinate's economizer exit header 14, distribution header 15, lower header 16, upper collecting chamber 17.
Detailed description of the invention
Illustrate with reference to accompanying drawing and following concrete detailed description is done to the present invention.As shown in drawings, structure of the present invention comprises burner 1, burner hearth 2, economizer 3, Horizontal air preheater 4, drum 5, wall with refractory lining, refracto 6, water-cooling wall 7, furnace hopper 8, furnace arch, furnace nose 9, header 10, oblique furnace bottom 11, rear roof tube 12, higher level's economizer import header 13, subordinate's economizer exit header 14, distribute header 15, lower header 16, upper collecting chamber 17, is characterized in that the cross section of burner hearth 2 is for square, is provided with the burner 1 of low nitrogen type dedicated water coal slurry, has additional wall with refractory lining, refracto 6 around burner 1 water-coal-slurry spout absolute altitude section, before burner hearth 2 at four angles place of burner hearth 2, after, left, right wall is made by water-cooling wall 7, burner hearth 2 is full film type wall hermetically-sealed construction, the lower end of water-cooling wall 7 extends to form furnace hopper 8 downwards, water-cooling wall 7 upper end on rear side of burner hearth 2 extends outstanding formation furnace arch, furnace nose 9 in stove, furnace arch, furnace nose 9 upwards extends to form two-way, wherein a road enters header 10 vertically upward, another road composition fin panel casing forms the oblique furnace bottom 11 bottom horizontal flue, roof tube 12 after water-cooling wall 7 on front side of burner hearth 2 extends back and forms, economizer 3 and Horizontal air preheater 4 are in intersecting two-staqe fixing.
The Water flow-path that supplies of water-coal-slurry hot-water boiler is: boiler adopts forced circulation, system return is introduced into higher level's economizer import header, distribution header is entered by subordinate's economizer exit header after higher level's economizer, subordinate's economizer, by the uniform distribution of distribution header to water-cooling wall front, rear, left and right lower header, in the water-cooling wall of front, rear, left and right, medium once rises, and is collected to drum draws by front, rear, left and right water-cooling wall upper collecting chamber.
Embodiment recited above is only be described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; under the prerequisite not departing from design concept of the present invention; the various modification that in this area, common engineers and technicians make technical scheme of the present invention and improvement; protection scope of the present invention all should be fallen into; the technology contents of request protection of the present invention, all records in detail in the claims.
Claims (3)
1. water-coal-slurry hot-water boiler system, comprises burner (1), burner hearth (2), economizer (3), Horizontal air preheater (4), drum (5), wall with refractory lining, refracto (6), water-cooling wall (7), furnace hopper (8), furnace arch, furnace nose (9), header (10), oblique furnace bottom (11), rear roof tube (12), higher level's economizer import header (13), subordinate's economizer exit header (14), distribute header (15), lower header (16), upper collecting chamber (17), it is characterized in that the cross section of burner hearth (2) is for square, the burner (1) of low nitrogen type dedicated water coal slurry is provided with at four angles place of burner hearth (2), wall with refractory lining, refracto (6) is had additional, before burner hearth (2) around burner (1) water-coal-slurry spout absolute altitude section, after, left, right wall is made by water-cooling wall (7), burner hearth (2) is full film type wall hermetically-sealed construction, the lower end of water-cooling wall (7) extends to form furnace hopper (8) downwards, water-cooling wall (7) upper end of burner hearth (2) rear side extends outstanding formation furnace arch, furnace nose (9) in stove, furnace arch, furnace nose (9) upwards extends to form two-way, wherein a road enters header (10) vertically upward, another road composition fin panel casing forms the oblique furnace bottom (11) bottom horizontal flue, roof tube (12) after the water-cooling wall (7) of burner hearth (2) front side extends back and forms, economizer (3) and Horizontal air preheater (4) are in intersecting two-staqe fixing.
2. the water-coal-slurry hot-water boiler system according to claims 1, it is characterized in that the burner (1) of the low nitrogen type dedicated water coal slurry that four angles of burner hearth (2) are arranged is arranged in quadrangle tangential circle, the quantity of burner (1) is four.
3. the water-coal-slurry hot-water boiler system according to claims 1, it is characterized in that wall with refractory lining, refracto (6) is made for Fire and abrasion resistant material, the thickness of wall with refractory lining, refracto (6) is 70-95 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202214.7A CN105091320A (en) | 2014-05-11 | 2014-05-11 | CWS (Coal Water Slurry) hot water boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202214.7A CN105091320A (en) | 2014-05-11 | 2014-05-11 | CWS (Coal Water Slurry) hot water boiler system |
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| CN105091320A true CN105091320A (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410202214.7A Pending CN105091320A (en) | 2014-05-11 | 2014-05-11 | CWS (Coal Water Slurry) hot water boiler system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016226A (en) * | 2016-07-14 | 2016-10-12 | 无锡华光锅炉股份有限公司 | Gas-fired boiler |
| CN106642045A (en) * | 2017-01-05 | 2017-05-10 | 中国石油天然气集团公司 | Water-coal-slurry steam injection boiler in oilfields |
| CN108443896A (en) * | 2018-04-18 | 2018-08-24 | 华北电力大学 | One kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper |
| CN109059263A (en) * | 2018-09-29 | 2018-12-21 | 青岛特利尔环保股份有限公司 | Fluidised form balances the ciculation fluidized burning hot-water boiler of water-coal-slurry and its combustion method |
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| US6030204A (en) * | 1998-03-09 | 2000-02-29 | Duquesne Light Company | Method for NOx reduction by upper furnace injection of solutions of fixed nitrogen in water |
| US6206685B1 (en) * | 1999-08-31 | 2001-03-27 | Ge Energy And Environmental Research Corporation | Method for reducing NOx in combustion flue gas using metal-containing additives |
| CN2475937Y (en) * | 2001-03-13 | 2002-02-06 | 冶金工业部鞍山热能研究院 | Refuse incinerator by moltenslag method |
| CN2804617Y (en) * | 2005-06-09 | 2006-08-09 | 南通万达锅炉股份有限公司 | Boiler of burning coal slurry |
| CN102661600A (en) * | 2012-04-27 | 2012-09-12 | 杭州锅炉集团股份有限公司 | Clean-burning blast furnace gas boiler |
| CN202598491U (en) * | 2012-03-09 | 2012-12-12 | 武汉华是能源环境工程有限公司 | Coal water slurry low-nitrogen rotational flow combustion boiler |
| CN102901209A (en) * | 2012-10-31 | 2013-01-30 | 山西蓝天环保设备有限公司 | Large-sized pulverized-coal combustion hot water boiler |
| CN204006637U (en) * | 2014-05-11 | 2014-12-10 | 南通万达锅炉有限公司 | Water-coal-slurry hot-water boiler |
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2014
- 2014-05-11 CN CN201410202214.7A patent/CN105091320A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6030204A (en) * | 1998-03-09 | 2000-02-29 | Duquesne Light Company | Method for NOx reduction by upper furnace injection of solutions of fixed nitrogen in water |
| US6206685B1 (en) * | 1999-08-31 | 2001-03-27 | Ge Energy And Environmental Research Corporation | Method for reducing NOx in combustion flue gas using metal-containing additives |
| CN2475937Y (en) * | 2001-03-13 | 2002-02-06 | 冶金工业部鞍山热能研究院 | Refuse incinerator by moltenslag method |
| CN2804617Y (en) * | 2005-06-09 | 2006-08-09 | 南通万达锅炉股份有限公司 | Boiler of burning coal slurry |
| CN202598491U (en) * | 2012-03-09 | 2012-12-12 | 武汉华是能源环境工程有限公司 | Coal water slurry low-nitrogen rotational flow combustion boiler |
| CN102661600A (en) * | 2012-04-27 | 2012-09-12 | 杭州锅炉集团股份有限公司 | Clean-burning blast furnace gas boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016226A (en) * | 2016-07-14 | 2016-10-12 | 无锡华光锅炉股份有限公司 | Gas-fired boiler |
| CN106016226B (en) * | 2016-07-14 | 2018-10-16 | 无锡华光锅炉股份有限公司 | A kind of gas fired-boiler |
| CN106642045A (en) * | 2017-01-05 | 2017-05-10 | 中国石油天然气集团公司 | Water-coal-slurry steam injection boiler in oilfields |
| CN108443896A (en) * | 2018-04-18 | 2018-08-24 | 华北电力大学 | One kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper |
| CN109059263A (en) * | 2018-09-29 | 2018-12-21 | 青岛特利尔环保股份有限公司 | Fluidised form balances the ciculation fluidized burning hot-water boiler of water-coal-slurry and its combustion method |
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Application publication date: 20151125 |
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