CN201903040U - External welded junction-type pyrite waste heat boiler - Google Patents
External welded junction-type pyrite waste heat boiler Download PDFInfo
- Publication number
- CN201903040U CN201903040U CN2010206742888U CN201020674288U CN201903040U CN 201903040 U CN201903040 U CN 201903040U CN 2010206742888 U CN2010206742888 U CN 2010206742888U CN 201020674288 U CN201020674288 U CN 201020674288U CN 201903040 U CN201903040 U CN 201903040U
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- sealing plate
- waste heat
- heat boiler
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- flue
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Abstract
The utility model discloses an external welded junction-type pyrite waste heat boiler, which comprises a boiler body, a smoke inlet, a vertical flue, a horizontal flue, a boiler barrel, an upper collection box, a lower collection box and the like, wherein membrane-type water walls are arranged on both sides of the horizontal flue; a ceiling water wall, a superheater and an arciform flag surface tube stack are arranged inside the horizontal flue; flat steel bars of the membrane-type water walls on both sides of the arciform flag surface tube stack are connected together; the flat steel bars at the upper parts on the both sides are fixedly connected with a top seal plate respectively; in addition, a U-shaped expansion joint is arranged on the top seal plate so as to partition stack gases and a fillet weld on a heating surface. The external welded junction-type pyrite waste heat boiler can greatly reduce the contact between the stack gases and the fillet weld on the heating surface, and can be prevented from generating acidizing fluid and corroding the fillet weld to the utmost extent, thereby improving the safety of the boiler.
Description
Technical field
The utility model relates to a kind of waste heat boiler, especially for the Natural Circulation waste heat boiler in the pyrite-based sulfuric acid production system.
Background technology
In the pyrite-based sulfuric acid production process, carry out roasting to troilite, produce about 900 ℃ high temperature during roasting, contain SO
2Reach 12%, high mine dust density (300-400g/Nm
3) flue gas, flue gas enters waste heat boiler and carries out heat exchange, absorbs the waste heat in the flue gas, and the superheated steam that the water in the boiler is converted into band pressure goes generating again or makes industrial steam.To remove about 70% mine dust in the flue gas simultaneously, and leave boiler after flue-gas temperature is reduced to about 380 ℃ and go next procedure to produce sulfuric acid.At present, extensively practical waste heat boiler, as disclosing several forms of Natural Circulation waste heat boiler in " sulfuric acid industry " magazine second phase in 1992 " the domestic and international state of development summary of pyrite-based sulfuric acid production waste heat boiler " literary composition, and patent No. ZL92220015.7 Natural Circulation waste heat boiler belongs to suspension type four flues " W " type waste heat boiler, body of heater is tall and big, operation maintenance inconvenience, the steel consumption is big; Patent No. ZL95242918.7, ZL200520033971.2 belongs to right angle " L " type waste heat boiler, joint angle weld seam on its heating surface is all in fume side, the inside of these angle weldings exists defectives such as welding stress, pore, slag inclusion, lack of penetration, crackle inevitably, and the ash-laden gas that is flowing certainly will will produce relative friction and cause wearing and tearing with weld seam; The relieving haperacidity flue gas cold air that in a single day bleeds in addition, when airborne moisture content and sulfur-containing smoke gas are lower than the condition of sulfur oxide gas dew point in the relieving haperacidity flue gas again at the welded tube sub-surface metal temperature of boiler, easily form acid solution, produce strong corrosion, and angle welding is the weakest link of boiler, it is unavoidable that the carbonated drink leakage situation appears in angle welding, but after taking place, accident can not be found in time again, by the time form a large amount of acid mists because of leaking, near the heating surface pipe macro-corrosion leak source, the state of affairs just is found after enlarging, again because flue gas contains high concentrate dust, pernicious gas, the space is narrow and small again, the abominable factor that waits of environment exists, and find correct leakage point position and damaged condition, is very difficult problem, problem all fails to be solved well for a long time hereto.
The utility model content
The purpose of this utility model is the above-mentioned deficiency at prior art, a kind of weld bond externally positioned type troilite waste heat boiler is provided, it can significantly reduce contacting of flue gas and heating surface angle welding, avoid forming washing away of acid liquid corrosion angle welding and ash-laden gas to greatest extent, thereby improve the security of boiler.
For achieving the above object, weld bond externally positioned type troilite waste heat boiler of the present utility model, comprise body of heater, contraction type advances mouth, vertical gas pass, horizontal flue, drum, the carbonated drink tube connector, common downcomer and distributing pipe, upper collecting chamber, the next part case, collection case communicating pipe, several ash buckets, outlet flue, sidewall at vertical gas pass is provided with fin panel casing, both sides at horizontal flue are provided with fin panel casing, be provided with ceiling water-cooling wall and superheater in the front portion of horizontal flue, be provided with arc flag facial canal group at the rear portion of horizontal flue, it is characterized in that described arc flag facial canal group both sides fin panel casing on, the below band steel is the vertical comb sealing plate of continuous several piece, the middle part band steel of fin panel casing is a several piece aliform band steel, on the aliform band steel, the lower end connects firmly with corresponding vertical comb sealing plate by horizontal comb sealing plate respectively, the arc pipe two ends of arc flag facial canal group are passed respectively, vertical comb sealing plate of below and its upright collection case connect firmly, the vertical comb sealing plate in the top of both sides connects firmly with the top seal plate respectively, the top seal plate is provided with the expansion joint of U-shaped, and vertical comb sealing plate of below connects firmly with corresponding next part case.
The utility model since below the rear portion of horizontal flue, the arc flag facial canal group both sides fin panel casing vertically comb sealing plate, horizontal comb sealing plate, aliform band steel, horizontal comb sealing plate, above vertically comb sealing plate and top seal plate connect firmly, form the housing of sealing, the angle welding of flue gas and arc flag facial canal group is separated, even sulfur oxide gas touches the parts that are lower than its dew point in the flue gas, can not form acid solution at the angle welding place yet, avoid angle welding to be corroded, thereby improve the security of boiler; Even also can not produce chain corrosion behind extremely indivedual welding seam leakages, because of leaking out thousand times of the long-pending expansion enlarged proximal of band setting-out gas,, can be overhauled processing fast again so outside stove, can in time find breakthrough;
As further improvement of the utility model, the end of described ceiling water-cooling wall and comb shape right angle sealing plate connect firmly, and this comb shape right angle sealing plate also connects firmly with the corresponding collection case communicating pipe and the band steel of fin panel casing; The flue-gas temperature of horizontal flue front portion reduces from front to back successively, all is higher than the dew point of sulfur oxide gas usually, and the setting of this comb shape right angle sealing plate can prevent that the lower flue gas of rear end temperature from contacting with the terminal pipe angle welding of ceiling water-cooling wall;
As further improvement of the utility model, the lower end of superheater both sides fin panel casing pipe also connects firmly with corresponding next part case by comb shape right angle sealing plate; The flue-gas temperature of horizontal flue lower front is lower, and the setting of this comb shape right angle sealing plate can prevent that the flue gas of horizontal flue lower front from contacting with the lower end pipe angle welding of both sides fin panel casing;
In sum, the utility model can significantly reduce contacting of flue gas and heating surface angle welding, avoids forming the acid liquid corrosion angle welding to greatest extent, thereby improves the security of boiler.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is the enlarged drawing of arc flag facial canal group among Fig. 2.
Fig. 4 is the right view of upper and lower band steel among Fig. 3.
Fig. 5 is the vertical view of comb sealing plate horizontal among Fig. 3.
Fig. 6 is the partial enlarged drawing at D place among Fig. 1.
Fig. 7 is the partial enlarged drawing at E place among Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
By Fig. 1, shown in Figure 2, this weld bond externally positioned type troilite waste heat boiler, comprise body of heater 1, contraction type advances mouth 2, vertical gas pass 3, horizontal flue 4, drum 5, carbonated drink tube connector 6, common downcomer 7 and distributing pipe 8, upper collecting chamber 9, next part case 10, collection case communicating pipe 11, several ash buckets 12, outlet flue 13, sidewall at vertical gas pass 3 is provided with fin panel casing, both sides at horizontal flue 4 are provided with fin panel casing, be provided with ceiling water-cooling wall 14 and superheater 15 in the front portion of horizontal flue 4, be provided with arc flag facial canal group 16 at the rear portion of horizontal flue 4, as Fig. 3, Fig. 4 and shown in Figure 5, on the fin panel casing of described arc flag facial canal group 16 both sides, below band steel 17 is the vertical comb sealing plate of the several piece that is weldingly connected, form several pores in the middle of it, the middle part band steel 18 of fin panel casing is a several piece aliform band steel, on the aliform band steel 18, the lower end is welded with corresponding vertical comb sealing plate by horizontal comb sealing plate 19 respectively and is connected firmly, the arc pipe 16a two ends of arc flag facial canal group 16 are passed respectively, the pore of vertical comb sealing plate of below and its upright collection case 16b connect firmly, the vertical comb sealing plate in the top of both sides connects firmly with 20 welding of top seal plate respectively, top seal plate 20 is provided with the expansion joint 20a of U-shaped, and vertical comb sealing plate of below connects firmly with 10 welding of corresponding next part case; As shown in Figure 6,21 welding of the end of described ceiling water-cooling wall 14 and comb shape right angle sealing plate connect firmly, and this comb shape right angle sealing plate 21 also connects firmly with the corresponding collection case communicating pipe 11 and the band steel welding of fin panel casing; As shown in Figure 7, the lower end of superheater 15 both sides fin panel casing pipes 23 also connects firmly with 10 welding of corresponding next part case by comb shape right angle sealing plate 22;
The utility model is owing to the rear portion at horizontal flue 4, the vertical comb sealing plate 17 in below of arc flag facial canal group 16 both sides fin panel casings, horizontal comb sealing plate 19, aliform band steel 18, horizontal comb sealing plate 19, the top is comb sealing plate 17 vertically, and top seal plate 20 connects firmly, form the housing of sealing, the angle welding of flue gas and arc flag facial canal group 16 is separated, and this regional flue-gas temperature is minimum in the body of heater, even sulfur oxide gas touches the parts that are lower than its dew point in the flue gas, can not form acid solution at the angle welding place yet, avoid angle welding to be corroded, thereby improve the security of boiler; Even also can not produce chain corrosion behind extremely indivedual welding seam leakages, because of leaking out thousand times of the long-pending expansion enlarged proximal of band setting-out gas,, can be overhauled processing fast again so can in time find breakthrough; The setting of comb shape right angle sealing plate 21, can prevent that the lower flue gas of ceiling water-cooling wall 14 rear end temperature from contacting with the pipe angle welding, comb shape right angle sealing plate 22 can prevent that the flue gas of horizontal flue 4 lower front from contacting with the lower end pipe angle welding of both sides fin panel casing, avoid forming the acid liquid corrosion angle welding to greatest extent, thereby improve the security of boiler.
Claims (3)
1. weld bond externally positioned type troilite waste heat boiler, comprise body of heater, contraction type advances mouth, vertical gas pass, horizontal flue, drum, the carbonated drink tube connector, common downcomer and distributing pipe, upper collecting chamber, the next part case, collection case communicating pipe, several ash buckets, outlet flue, sidewall at vertical gas pass is provided with fin panel casing, both sides at horizontal flue are provided with fin panel casing, be provided with ceiling water-cooling wall and superheater in the front portion of horizontal flue, be provided with arc flag facial canal group at the rear portion of horizontal flue, it is characterized in that described arc flag facial canal group both sides fin panel casing on, the below band steel is the vertical comb sealing plate of continuous several piece, the middle part band steel of fin panel casing is a several piece aliform band steel, on the aliform band steel, the lower end connects firmly with corresponding vertical comb sealing plate by horizontal comb sealing plate respectively, the arc pipe two ends of arc flag facial canal group are passed respectively, vertical comb sealing plate of below and its upright collection case connect firmly, the vertical comb sealing plate in the top of both sides connects firmly with the top seal plate respectively, the top seal plate is provided with the expansion joint of U-shaped, and vertical comb sealing plate of below connects firmly with corresponding next part case.
2. weld bond externally positioned type troilite waste heat boiler as claimed in claim 1 is characterized in that the end of described ceiling water-cooling wall and comb shape right angle sealing plate connect firmly, and this comb shape right angle sealing plate also connects firmly with the corresponding collection case communicating pipe and the band steel of fin panel casing.
3. weld bond externally positioned type troilite waste heat boiler as claimed in claim 1 or 2, the lower end that it is characterized in that superheater both sides fin panel casing pipe also connect firmly with corresponding next part case by comb shape right angle sealing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206742888U CN201903040U (en) | 2010-12-22 | 2010-12-22 | External welded junction-type pyrite waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206742888U CN201903040U (en) | 2010-12-22 | 2010-12-22 | External welded junction-type pyrite waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201903040U true CN201903040U (en) | 2011-07-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206742888U Expired - Lifetime CN201903040U (en) | 2010-12-22 | 2010-12-22 | External welded junction-type pyrite waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201903040U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276559A (en) * | 2015-11-26 | 2016-01-27 | 华西能源工业股份有限公司 | Fixing device for vertical superheater of biomass circulating fluidized bed boiler |
| CN105387442A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨锅炉厂有限责任公司 | Expansion joint sealing device of boiler ceiling |
| CN107795984A (en) * | 2017-11-09 | 2018-03-13 | 无锡华光锅炉股份有限公司 | Prevent the sealing structure of pendant superheater dilatancy |
| CN109185906A (en) * | 2018-09-21 | 2019-01-11 | 华西能源工业股份有限公司 | Sealing structure at the top of the flue of refuse-incinerated waste heat boiler superheater area |
-
2010
- 2010-12-22 CN CN2010206742888U patent/CN201903040U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276559A (en) * | 2015-11-26 | 2016-01-27 | 华西能源工业股份有限公司 | Fixing device for vertical superheater of biomass circulating fluidized bed boiler |
| CN105276559B (en) * | 2015-11-26 | 2018-01-02 | 华西能源工业股份有限公司 | The vertical superheater fixing device of biomass recirculating fluidized bed boiler |
| CN105387442A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨锅炉厂有限责任公司 | Expansion joint sealing device of boiler ceiling |
| CN107795984A (en) * | 2017-11-09 | 2018-03-13 | 无锡华光锅炉股份有限公司 | Prevent the sealing structure of pendant superheater dilatancy |
| CN107795984B (en) * | 2017-11-09 | 2023-10-20 | 无锡华光环保能源集团股份有限公司 | Sealing structure for preventing expansion deformation of screen type superheater |
| CN109185906A (en) * | 2018-09-21 | 2019-01-11 | 华西能源工业股份有限公司 | Sealing structure at the top of the flue of refuse-incinerated waste heat boiler superheater area |
| CN109185906B (en) * | 2018-09-21 | 2024-01-09 | 华西能源工业股份有限公司 | Top sealing structure of flue in superheater area of garbage incineration waste heat furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110720 |