CN103712205A - Circulating fluidized bed hot-water boiler free of abrasion and corrosion - Google Patents
Circulating fluidized bed hot-water boiler free of abrasion and corrosion Download PDFInfo
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- CN103712205A CN103712205A CN201410012416.5A CN201410012416A CN103712205A CN 103712205 A CN103712205 A CN 103712205A CN 201410012416 A CN201410012416 A CN 201410012416A CN 103712205 A CN103712205 A CN 103712205A
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Abstract
The invention relates to a circulating fluidized bed hot-water boiler free of abrasion and corrosion, and relates to a circulating fluidized bed hot-water boiler. The circulating fluidized bed hot-water boiler solves the problem that pipe burst is generated because the heated surface of a boiler is reduced in thickness by suffering from the abrasion and the corrosion since fuel coal generates a high-temperature flue gas when being combusted in a furnace body, the flue gas contains sulfides, high-temperature high-pressure fuel particles and dust and the flue gas generate great impact accompanied by invasion, namely high-temperature oxidation, fly ash erosion and low-temperature dew-point corrosion, on the heated surface of a boiler in a boiler body in the using process of the traditional high-capacity circulating fluidized bed hot-water boiler. The circulating fluidized bed hot-water boiler free of abrasion and corrosion comprises a hearth, a water-cooled wall, a flue, a coal economizer cladding tube, a coal economizer, an air preheater, a plurality of pins, a plurality of clasp nails, a plurality of steel grids, composite material refractory concrete and an anti-abrasion cover. The circulating fluidized bed hot-water boiler disclosed by the invention is used for industrial and agricultural heating and urban centralized heating.
Description
Technical field
The present invention relates to a kind of Circulating Fluidized Bed Hot Water Boiler, be specifically related to the Circulating Fluidized Bed Hot Water Boiler of a kind of wear prevention and corrosion.
Background technology
Large capacity circulating fluid bed heat homogeneous solution-type reactor is used widely in concentrated supply of heating in the city.In its fuel used coal, ash amount is large, sulfur compound.In use procedure, bunker coal burns and can produce the flue gas of high temperature in body of heater, sulfur compound in flue gas, HTHP fuel particle, dust, flue gas can produce enormous impact to the heating surface of boiler in body of heater, and be attended by high-temperature oxydation, Flying Ash Erosion, the infringements such as low-temperature dew point corrosion, cause boiler heating surface to be worn and torn, corrosion, make boiler heating surface reduced thickness, until generation booster, boiler heating surface wearing and tearing and seriously corroded have affected the use of boiler, shorten boiler service life, cause economic loss, make to have potential safety hazard in the use of boiler simultaneously.
Summary of the invention
The present invention is in order to solve at present large capacity circulating fluid bed heat homogeneous solution-type reactor in use, bunker coal burns and produces high-temperature flue gas in body of heater, sulfur compound in flue gas, HTHP fuel particle, dust, flue gas produce enormous impact to the heating surface of boiler in body of heater, and be attended by the infringements such as high-temperature oxydation, Flying Ash Erosion, low-temperature dew point corrosion, cause boiler heating surface to suffer wearing and tearing, corrosion, heating surface reduced thickness, the problem of generation booster.And a kind of wear prevention proposing and the Circulating Fluidized Bed Hot Water Boiler of corrosion.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: the Circulating Fluidized Bed Hot Water Boiler of a kind of wear prevention and corrosion, it comprises burner hearth, water-cooling wall, flue, economizer cage walls, economizer and air preheater, described burner hearth vertically arranges, burner hearth inside is followed successively by emulsion zone from the bottom to top, rare close phase transition region and dilute-phase zone, and be provided with furnace outlet window on the sidewall of the upper end of burner hearth, described water-cooling wall is vertically arranged on inboard wall of burner hearth, one end of described flue is arranged on furnace outlet window and communicates with burner hearth, the upper end that the other end of flue is arranged on economizer is connected with economizer, described economizer cage walls is fixed on the internal face of flue, described hot-water boiler also comprises some pins, some bitch, some steels grid, composite fireproof concrete, sprayed metal coating and anti-abrasion cover, one end of described pin is fixed on the water-cooling wall of emulsion zone surrounding, the pin other end extends to burner hearth is inner, the root of described bitch is fixed on water-cooling wall, bitch claw extends to burner hearth is inner, described steel grid is arranged on a side of water-cooling wall, be fixed on the claw of water-cooling wall and some bitch, described composite fireproof pouring concrete is between the steel grid of emulsion zone and the sidewall of burner hearth,
The water-cooling wall of described rare close phase transition region surrounding is along being bent by the direction outside burner hearth in burner hearth, offset to water-cooling wall and burner hearth surrounding sidewall, form rare close phase transition region and allow tubular construction, described rare close phase transition region and emulsion zone place water-cooling wall surrounding are cast with composite fireproof concrete
On described furnace outlet window surrounding water-cooling wall, be connected with pin, furnace outlet window surrounding water-cooling wall is cast with composite fireproof concrete and reinforces by pin,
On described flue internal face place economizer cage walls, be connected with a plurality of pins, the root of described a plurality of pins is arranged on economizer cage walls, and the claw of pin stretches out, and between described economizer cage walls and flue wall, is cast with composite fireproof concrete,
Described economizer contains economizer tube, and the top of described economizer tube is connected with high temperature resistant, wear-resistant anti-abrasion cover.
Described air preheater contains air preheat organ pipe, and described air preheat organ pipe top is connected with wear-resistant, corrosion-resistant anti-abrasion cover.
The beneficial effect that the present invention compared with prior art comprises is:
1, the present invention by arranging pin on heating surface easy to wear, bitch, steel grid cuts off with composite fireproof concrete the wearing and tearing that directly contact with heating surface, avoid sulfide and body of heater generation high-temperature oxydation and low-temperature dew point corrosion, improve the whole anti-wear property of boiler and corrosion resistance, significantly alleviated HTHP fuel particle, dust, the infringement that flue gas brings heating surface, effectively avoided the generation of booster phenomenon, strengthened the stability of Circulating Fluidized Bed Hot Water Boiler safe operation, the conventional maintenance of boiler number of times reduces half, the prolonged boiler overhaul life, extend 40% the service life of boiler.
2, in the present invention by air preheater and economizer, anti-abrasion cover being installed, extend air preheater and economizer service life, reach never wornout and corrosion, in the process of maintenance, anti-abrasion cover is for convenience detach and change, and uses flexibility high.
3, pin in the present invention, bitch, steel grid, composite fireproof concrete, sprayed metal coating, anti-abrasion cover for resistance to wearing, resistant material, easily manufactured, install simple, and with low cost, apply in boiler, improve boiler safety, prolonged boiler service life, economic benefit is high.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention, Fig. 2 is the enlarged drawing at I place in Fig. 1, and Fig. 3 is that in Fig. 2, E-E place is to view, and Fig. 4 is II place enlarged drawing in Fig. 1, Fig. 5 be in Fig. 4 K-K place to looking enlarged drawing, Fig. 6 is that in Fig. 1, A-A is to looking enlarged drawing, and Fig. 7 is H place enlarged drawing in Fig. 6, Fig. 8 be in Fig. 1 B-B place to looking enlarged drawing, Fig. 9 be in Fig. 1 C-C place to looking enlarged drawing, Figure 10 be the F-F of Fig. 9 place to looking enlarged drawing, Figure 11 be in Fig. 1 D-D place to looking enlarged drawing, Figure 12 be in Figure 11 G-G to looking enlarged drawing.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, a kind of wear prevention of present embodiment and the Circulating Fluidized Bed Hot Water Boiler of corrosion, it comprises burner hearth 1, water-cooling wall 2, flue 3, economizer cage walls 4, economizer 5 and air preheater 6, described burner hearth 1 vertically arranges, burner hearth 1 inside is followed successively by emulsion zone 1-1 from the bottom to top, rare close phase transition region 1-2 and dilute-phase zone 1-3, and on the sidewall of the upper end of burner hearth 1, be provided with furnace outlet window 1-5, described water-cooling wall 2 is vertically arranged on burner hearth 1 inwall, one end of described flue 3 is arranged on furnace outlet window 1-5 and above communicates with burner hearth 1, the upper end that the other end of flue 3 is arranged on economizer 5 is connected with economizer 5, described economizer cage walls 4 is fixed on the inner face of flue 3, described Circulating Fluidized Bed Hot Water Boiler also comprises some pin 7-1, some bitch 7-2, some steel grid 7-3, composite fireproof concrete seven-4 and anti-abrasion cover 7-5, one end of described pin 7-1 is fixed on the water-cooling wall 2 of emulsion zone 1-1 surrounding, the pin 7-1 other end extends to burner hearth 1 is inner, the root of described bitch 7-2 is fixed on water-cooling wall 2, bitch 7-2 claw extends to burner hearth 1 is inner, described steel grid 7-3 is arranged on a side of water-cooling wall 2, be fixed on the claw of water-cooling wall 2 and some bitch 7-2, described composite fireproof concrete seven-4 are cast between the steel grid 7-3 of emulsion zone 1-1 and the sidewall of burner hearth 1,
The water-cooling wall 2 of described rare close phase transition region 1-2 surrounding is along being bent by the direction outside burner hearth in burner hearth, offset to water-cooling wall 2 and burner hearth 1 surrounding sidewall, form rare close phase transition region and allow tubular construction, described rare close phase transition region 1-2 place water-cooling wall 2 surroundings are cast with composite fireproof concrete seven-4
On described furnace outlet window 1-5 surrounding water-cooling wall 2, be connected with pin 7-1, furnace outlet window 1-5 surrounding is cast with composite fireproof concrete seven-4,
On described flue 3 internal face place economizer cage walls 4, be connected with a plurality of pin 7-1, the root of described a plurality of pin 7-1 is arranged on economizer cage walls 4, the claw of pin 7-1 stretches out, and between economizer cage walls 4 and flue 3 walls, is cast with composite fireproof concrete seven-4
Described economizer 5 contains economizer tube 5-4, and the top of described economizer tube 5-4 is connected with anti-abrasion cover 7-5,
Described air preheater 6 contains air preheat organ pipe 6-4, and described air preheat organ pipe 6-4 top is connected with anti-abrasion cover 7-5.
In present embodiment, the junction 1-4 in four sidewall bights adjacent with burner hearth 1, burner hearth 1 interior dilute-phase zone 1-3 place is coated with high temperature resistant, wear-resistant metal sprayed coating, so arranges, and improves wearability and corrosion resistance.This metal spray coating technique is the process in tube surface strengthening and protection; it usings fuel, electric arc or plasma arc as thermal source; spraying alloy metal material welding wire is heated to fusing or plastic state; by means of compressed air or flame thrust, it is ejected on tube surface, forms sprayed metal coating.The water-cooling wall 2 of rare close phase transition region 1-2 surrounding outwards bends the avoiding structure that forms rare close phase transition region 1-2, and builds composite fireproof concrete 4 in the region of dodging out, has improved mar proof and heat-resisting quantity.
In present embodiment, composite fireproof concrete is high temperature resistant reaches 1500 ℃, its material property can stop effectively because furnace temperature changes the alternating thermal stress causing, the degree mutually causing due to generation chemical reaction changes, and the micro-crack extension that causes change in volume to produce, thereby greatly improved the elevated temperature strength of material, resistance to wearing in resistance to elevated temperatures and high temperature, anti-ash attack performance and heat endurance.Composite fireproof concrete descends top layer to form one deck glaze in working order, improved resistance to wearing in elevated temperature strength, heat resistance and the high temperature of this material, damage performance against corrosion and heat endurance, can reach more than 3 years the service life of the refractory material in serious wear district.
In present embodiment, the upper affixed anti-abrasion cover 7-5 of economizer tube 5-4 and air preheat organ pipe 6-4 adopts high temperature resistant, anti-abrasive material, strengthens mar proof and corrosion resistance.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, described in present embodiment, economizer 5 comprises top economizer 5-1, middle part economizer 5-2 and bottom economizer 5-3, and described top economizer 5-1, middle part economizer 5-2 and bottom economizer 5-3 from top to bottom set gradually.So arrange, segmentation economizer, conveniently overhauls and changes economizer inside anti-abrasion cover, economizer tube abrasion condition, and multistage economizer is worked simultaneously, makes the heat exchange effect of economizer more remarkable, and efficiency improves 10%.Other composition and connected mode are identical with the specific embodiment one.
In present embodiment, economizer 5 adopts the cigarette speed such as segmentation variable cross-section that become caliber to exempt from dust stratification design, adopt respectively Ф 38, Ф 42, Ф 60 different tube diameters pipes, flue gas flow rate whole process is all 6.8m/s left and right, because flue gas flow rate is lower, economizer surface wearing and tearing are less, avoid low-temperature dew point corrosion simultaneously.Multistage economizer becomes reverse flow with flue gas from bottom to top, and water flow velocity >=1.4m/s in economizer tube takes the gas producing in pipe out of in time.
The specific embodiment three: present embodiment is described in conjunction with Fig. 1, described in present embodiment, air preheater 6 comprises upper air preheater 6-1, middle part air preheater 6-2 and bottom air preheater 6-3, and described upper air preheater 6-1, middle part air preheater 6-2 and bottom air preheater 6-3 from top to bottom set gradually.So arrange, classification air preheater, conveniently overhauls and changes air preheater inside anti-abrasion cover, air preheat organ pipe abrasion condition, and multi-staged air preheater is worked simultaneously, make the heat exchange effect of air preheater more remarkable, operating efficiency improves, life.Other composition and connected mode are identical with the specific embodiment one.
Present embodiment air preheater adopts horizontal type structure, and air becomes counter-flow arrangement with flue gas, and air preheater low-temperature space bottom air preheat organ pipe adopts corrosion resisting steel material, avoids cold end corrosion.Tube case of air preheater is designed with free wxpansion body and air side sealing, guaranteed the sealing of flue, thereby avoided air to the leaking out of flue, boiler moved under compared with low excess air coefficient, improve boiler overall performance, avoided air preheater dust stratification and corrosion.
Operation principle
This Circulating Fluidized Bed Hot Water Boiler in the course of the work, the inner coal-fired a large amount of HTHP fuel particles that produce of burner hearth, dust, flue gas erosion heating surface, heating surface easy to wear place is cast with high temperature resistant, anti abrasive composite fireproof concrete and sprayed metal coating, fuel particle, dust, flue gas erosion composite fireproof concrete and sprayed metal coating, effectively reduce the damage of invading to heating surface, in economizer and air preheater, lay wear-resistant, corrosion resistant anti-abrasion cover, dust, flue gas erosion anti-abrasion cover, effectively reduce the erosion of flue dust to economizer and air preheater.
The undocumented technical characterictic of the present invention, is prior art, and as pressure detecting system, boiler control system, blower fan, the above-mentioned known technology in hot-water boiler field that is characterized as is no longer discussed herein.
Claims (3)
1. the Circulating Fluidized Bed Hot Water Boiler of a wear prevention and corrosion, it comprises burner hearth (1), water-cooling wall (2), flue (3), economizer cage walls (4), economizer (5) and air preheater (6), described burner hearth (1) vertically arranges, burner hearth (1) inside is followed successively by emulsion zone (1-1) from the bottom to top, rare close phase transition region (1-2) and dilute-phase zone (1-3), and on the upper end sidewall of burner hearth (1), be provided with furnace outlet window (1-5), described water-cooling wall (2) is vertically arranged on burner hearth (1) inwall, one end of described flue (3) is arranged on furnace outlet window (1-5) and above communicates with burner hearth (1), the upper end that the other end of flue (3) is arranged on economizer (5) is connected with economizer (5), described economizer cage walls (4) is fixed on the inner face of flue (3), it is characterized in that: described Circulating Fluidized Bed Hot Water Boiler also comprises some pins (7-1), some bitch (7-2), some steels grid (7-3), composite fireproof concrete (7-4) and anti-abrasion cover (7-5), one end of described pin (7-1) is fixed on the water-cooling wall (2) of emulsion zone (1-1) surrounding, pin (7-1) other end extends to burner hearth (1) is inner, the root of described bitch (7-2) is fixed on water-cooling wall (2), bitch (7-2) claw extends to burner hearth (1) is inner, described steel grid (7-3) is arranged on a side of water-cooling wall (2), be fixed on the claw of water-cooling wall (2) and some bitch (7-2), described composite fireproof concrete (7-4) is cast between the steel grid (7-3) of emulsion zone (1-1) and the sidewall of burner hearth (1),
The water-cooling wall (2) of described rare close phase transition region (1-2) surrounding is along being bent by the direction outside burner hearth in burner hearth, offset to water-cooling wall (2) and burner hearth (1) surrounding sidewall, form rare close phase transition region and allow tubular construction, described rare close phase transition region (1-2) is located water-cooling wall (2) surrounding and is cast with composite fireproof concrete (7-4)
On described furnace outlet window (1-5) surrounding water-cooling wall (2), be connected with pin (7-1), furnace outlet window (1-5) surrounding is cast with composite fireproof concrete (7-4),
On described flue (3) internal face place economizer cage walls (4), be connected with a plurality of pins (7-1), the root of described a plurality of pin (7-1) is arranged on economizer cage walls (4), the claw of pin (7-1) stretches out, between economizer cage walls (4) and flue (3) wall, be cast with composite fireproof concrete (7-4)
Described economizer (5) contains economizer tube (5-4), and the top of described economizer tube (5-4) is connected with anti-abrasion cover (7-5),
Described air preheater (6) contains air preheat organ pipe (6-4), and described air preheat organ pipe (6-4) top is connected with anti-abrasion cover (7-5).
2. the Circulating Fluidized Bed Hot Water Boiler of a kind of wear prevention according to claim 1 and corrosion, it is characterized in that: described economizer (5) comprises top economizer (5-1), middle part economizer (5-2) and bottom economizer (5-3), described top economizer (5-1), middle part economizer (5-2) and bottom economizer (5-3) from top to bottom set gradually.
3. the Circulating Fluidized Bed Hot Water Boiler of a kind of wear prevention according to claim 1 and corrosion, it is characterized in that: described air preheater (6) comprises upper air preheater (6-1), middle part air preheater (6-2) and bottom air preheater (6-3), described upper air preheater (6-1), middle part air preheater (6-2) and bottom air preheater (6-3) from top to bottom set gradually.
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| CN105782960A (en) * | 2016-05-10 | 2016-07-20 | 北京亚高科能源科技有限公司 | Circulating bed heat-conducting oil boiler with dense phase zone with anti-abrasion structures |
| CN107525762A (en) * | 2017-10-17 | 2017-12-29 | 华能国际电力股份有限公司 | A kind of experimental rig and method of the adhesiveness for testing metal surface thermally grown oxide film |
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| Publication number | Publication date |
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| CN103712205B (en) | 2015-10-28 |
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Denomination of invention: Circulating fluidized bed hot water boiler for preventing abrasion and corrosion Effective date of registration: 20220413 Granted publication date: 20151028 Pledgee: China Merchants Bank Co.,Ltd. Harbin Branch Pledgor: HARBIN HONGGUANG BOILER GENERAL FACTORY Co.,Ltd. Registration number: Y2022230000011 |