CN204986938U - Energy -conserving dust removal troilite exhaust -heat boiler - Google Patents
Energy -conserving dust removal troilite exhaust -heat boiler Download PDFInfo
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- CN204986938U CN204986938U CN201520534971.4U CN201520534971U CN204986938U CN 204986938 U CN204986938 U CN 204986938U CN 201520534971 U CN201520534971 U CN 201520534971U CN 204986938 U CN204986938 U CN 204986938U
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Abstract
The utility model discloses an energy -conserving dust removal troilite exhaust -heat boiler, the utility model discloses a furnace body sets up and be equipped with into mouth and outlet flue on the furnace body, sets up vertical gas pass and horizontal gas pass in the furnace body, be equipped with first evaporimeter, high temperature over heater, low temperature superheater, second evaporimeter, third evaporator, fourth evaporimeter in the horizontal gas pass in proper order, the furnace body outside still is equipped with the drum, be equipped with common downcomer on the drum, the drum is linked together with second evaporimeter, third evaporator, fourth evaporimeter respectively, the common downcomer bottom is linked together with second evaporimeter, third evaporator, fourth evaporimeter respectively, the furnace body bottom still is equipped with the water -cooling ash bucket. The utility model discloses it is safe, stable to have higher operation, and operates, overhauls the convenience, can avoid the super temperature booster of superheater tube simultaneously, has fine dust removal effect moreover.
Description
Technical field
The utility model relates to a kind of energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite.
Background technology
In pyrite-based sulfuric acid production process, roasting to be carried out to troilite, roasting produce about 950 DEG C high temperature, containing SO
2reach 12%, high mine dust density (300 ~ 400g/Nm
3) flue gas, enter waste heat boiler and carry out heat exchange, absorb the waste heat in flue gas, the water in boiler is converted into superheated steam with pressure and goes generating again or as industrial steam.To remove about 75% mine dust in flue gas, flue-gas temperature is left boiler and is gone next procedure to produce sulfuric acid after being down to about 360 DEG C simultaneously.At present, the waste heat pot of extensive practicality, as disclosed several shapes of Natural Circulation HRSG in " sulfuric acid industry " magazine the 2nd phase in 1992 " sulfurous iron ore acid making waste heat boiler New Host plant summary " literary composition, the Natural Circulation HRSG of horizontal flue transversal flow is adopted to account for mainly, there is following problem in the waste heat boiler of this form: 1. at boiler first flue windward side place in actual motion, arrange superheater, often cause superheater tube overtemperature tube burst; 2. SO is contained in flue gas
2reach about 12%, flue gas in cooling procedure, easily to boiler corrosion, when heating surface wall lower than or close to SO
2during dew point, flue gas meets steam or cold air condensation generation dilute sulfuric acid causes acid corrosion, and particularly the easiest acid corrosion of angle welding of back-end surfaces and smoke contacts, causes heating surface booster; 3. high concentration (300 ~ 400g/Nm is contained in flue gas
3) mine dust, easily cause pipe wear, and these mine dusts have cohesiveness, can make flue actual internal area ash, conventional employing rapping, ash-removal effect is not very desirable; 4. the mine dust temperature that boiler is removed reaches 500 ~ 600 DEG C, directly enters induction system by ash discharging hole, then enters cold slag system and cool mine dust, and some waste heat does not utilize very well; 5. ash bucket adopts steel plate structure, the inside casting refractory concrete, and casting ash bucket can not rapping, and dust stratification is comparatively serious, and the refractory concrete soil block blocking ash discharging hole sometimes come off in addition, has a strong impact on the safe operation of boiler; 6. evaporating heating surface adopts consistent flue gas flow area, cause afterbody evaporating heating surface flue gas flow rate lower, thus heat transfer efficiency is lower, for reaching the exhaust gas temperature of boiler requirement, boiler evaporating heating surface area must be increased, thus add boiler unitary steel material consumption.
Utility model content
The purpose of this utility model is to solve the problem, and provides a kind of energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite, comprise body of heater, what be arranged at top, body of heater one end enters mouth, is arranged at the outlet flue of the body of heater other end, to be arranged in body of heater and to be positioned at into the vertical gas pass below mouth, and being arranged at the horizontal flue communicated with vertical gas pass in body of heater; The first evaporimeter, high temperature superheater, low temperature superheater, the second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter is provided with successively in described horizontal flue; Described first evaporimeter is near vertical gas pass, and described 4th evaporimeter is near outlet flue; The drum being positioned at body of heater outside is also provided with above described body of heater; Described drum is provided with and is communicated with common downcomer with it; Described drum is connected with the second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter respectively; Be connected with the second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter respectively bottom described common downcomer; Described bottom of furnace body is also provided with water-cooled ash bucket.
Further, described second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter are communicated with drum respectively by the upper collecting chamber be communicated with successively, carbonated drink tube connector; Described second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter are communicated with common downcomer respectively by the lower header be communicated with successively, distributing pipe.Wherein, can assemble by part greatly in Mei Zu evaporimeter factory, guarantee both quality and quantity, shorten the boiler in-site installation cycle.
Again further, described first evaporimeter is communicated with drum by the water outlet header that is communicated with successively, carbonated drink tube connector; Described first evaporimeter is communicated with common downcomer by the water inlet header that is communicated with successively, distributing pipe.
Further, described first evaporimeter is made up of several grooved pipe, and be positioned at high temperature superheater and low temperature superheater before, so the first evaporimeter is both as heating surface area absorption portion heat, reach again dedusting object, reduce fouling of heating surface below, also have a free-revving engine to be exactly reduce the flue-gas temperature through corresponding superheater surface, prevent superheater tube overtemperature tube burst.
In addition, described second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter are all to be made up of several pieces Σ shape heating surface tube groups; Described Σ shape heating surface tube group is made up of intake header, heating surface tube water outlet header and Σ shape heating surface tube of heating surface tube; Described heating surface tube water inlet header is communicated with lower header, and described heating surface tube water outlet header is communicated with upper collecting chamber.
In addition, described water-cooled ash bucket is separated into multiple ash bucket by partition wall, and is equipped with ash discharging hole below each ash bucket; Described ash bucket top is also provided with gas baffle, prevents exhaust gases passes short circuit.
Select as one, described water-cooled ash bucket is provided with ash bucket water inlet header and ash bucket water outlet header, and is also provided with bunker wall vibration device on water-cooled ash bucket sidewall.Wherein, ash bucket water inlet header and ash bucket water outlet header are all outside at body of heater, and the pipeline on water-cooled ash bucket heating surface and corresponding header junction are also outside at body of heater, thus prevent heating surface tube angle welding low-temperature-acid-corrosion.
Further, described high temperature superheater, low temperature superheater, the second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter top are equipped with explosion deashing device, and often organize the sealing of evaporimeter top employing steel plate, easy access and dust stratification on cleaning heating surface, the steel plate of sealing is connected on sidewall, prevents thermal expansion; And be often provided with inspection manhole and passage between group heating surface.
Again further, the cross section of described second evaporimeter, the 3rd evaporimeter, the 4th evaporimeter reduces gradually, improves evaporator heat transfer efficiency, thus improves utilization rate just now.
Further, described furnace body inside wall is provided with fin panel casing, and evaporator tube joint angle weld seam is arranged in outside fin panel casing, and is provided with the steel plate for carrying out secondary seal in body of heater outside, prevents corrosion toxic gas SO
2leak.
The utility model compared with prior art, has the following advantages and beneficial effect:
The utility model has higher security of operation, stability, operation, maintenance are conveniently, avoid overheated organ overtemperature tube burst, there is good dust removing effects, reduce evaporating heating surface dust stratification, avoid evaporating heating surface low-temperature-acid-corrosion, the waste heat in Appropriate application mine dust particle, thus improve the thermal efficiency of boiler.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model sectional view.
Fig. 3 be in Fig. 1 A-A to generalized section.
Fig. 4 is grooved heating surface schematic diagram in the utility model.
Fig. 5 be in Fig. 4 B-B to generalized section.
Fig. 6 is I place enlarged drawing in Fig. 4.
Wherein, mark corresponding parts name in accompanying drawing to be called: 1-carbonated drink tube connector, 2-common downcomer, 3-distributing pipe, 4-drum, 5-upper collecting chamber, 6-lower header, 7-body of heater, 8-enters mouth, 9-vertical gas pass, 10-first evaporimeter, 11-high temperature superheater, 12-low temperature superheater, 13-second evaporimeter, 14-the 3rd evaporimeter, 15-the 4th evaporimeter, 16-outlet flue, 17-gas baffle, 18-water-cooled ash bucket, 19-partition wall, 20-exhaust opening, 21-explosion deashing device, 22-bunker wall vibration device, 23-horizontal flue, 24-Σ shape heating surface tube, 25-is intake header, 26-water outlet header, 27-heating surface tube water inlet header, 28-heating surface tube water outlet header, 29-ash bucket water inlet header, 30-ash bucket water outlet header.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in figs. 1 to 6, energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite, comprise body of heater 7, what be arranged at top, body of heater 7 one end enters mouth 8, be arranged at the outlet flue 16 of body of heater 7 other end, to be arranged in body of heater 7 and to be positioned at into the vertical gas pass 9 below mouth, and being arranged at the horizontal flue 23 communicated with vertical gas pass 9 in body of heater 7; The first evaporimeter 10, high temperature superheater 11, low temperature superheater 12, second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 is provided with successively in described horizontal flue 23; Described first evaporimeter 10 is near vertical gas pass 9, and described 4th evaporimeter 15 is near outlet flue 16; The drum 4 being positioned at body of heater 7 outside is also provided with above described body of heater 7; Described drum 4 is provided with and is communicated with common downcomer 2 with it; Described drum 4 is connected with the second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 respectively; Be connected with the second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 respectively bottom described common downcomer 2; Water-cooled ash bucket 18 is also provided with bottom described body of heater 7.
Wherein, be provided with wearing-resistant tile at high temperature superheater near the one side of the first evaporimeter, thus effectively can protect the parts at high temperature superheater and rear; Inspection manhole and passage is also provided with in addition, to facilitate staff to overhaul between high temperature superheater and low temperature superheater.
In order to realize circulating respectively, in order to avoid there is impact between each parts, described second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 are communicated with drum 4 respectively by the upper collecting chamber 5 be communicated with successively, carbonated drink tube connector 1; Described second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 are communicated with common downcomer 2 respectively by the lower header 6 be communicated with successively, distributing pipe 3.
Conveniently install and control, described first evaporimeter 10 is communicated with drum 4 by the water outlet header 26 that is communicated with successively, carbonated drink tube connector 1; Described first evaporimeter 10 is communicated with common downcomer 2 by the water inlet header 25 that is communicated with successively, distributing pipe 3.
In order to remove dust stratification on heating surface, so described high temperature superheater 11, low temperature superheater 12, second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 top are equipped with explosion deashing device 21.By above-mentioned setting, thus can rely on gravity principle, ash-removal effect is good, does not account for boiler surrounding volume, reduces fouling of heating surface.
Particularly, described water-cooled ash bucket 18 is separated into multiple ash bucket by partition wall 19, and is equipped with ash discharging hole 20 below each ash bucket; Described ash bucket top is also provided with gas baffle 17.By arranging gas baffle, can flue gas shunting be prevented and reduce heat exchange efficiency.What deserves to be explained is all there is an ash bucket below each evaporimeter, also have an ash bucket below certain high temperature superheater and low temperature superheater, that is water-cooled ash bucket is divided into five ash buckets.
Due to heating surface and flue gas and mine dust heat transfer type different, so described water-cooled ash bucket 18 is provided with ash bucket water inlet header 29 and ash bucket water outlet header 30, by independent water circulation system, as occurred, water screen tube booster is more convenient in the outer shutoff of stove, prevents angle welding low-temperature-acid-corrosion in addition.
In order to reduce water-cooled ash bucket dust stratification, water-cooled ash bucket 19 sidewall is also provided with bunker wall vibration device 22.
Particularly, described first evaporimeter 9 is made up of several grooved pipe, can improve cooling dust removing effects of the present utility model further.And the first evaporimeter be positioned at high temperature superheater and low temperature superheater before, so the first evaporimeter is both as heating surface area absorption portion heat, reach again dedusting object, reduce fouling of heating surface below, also have a free-revving engine to be exactly reduce the flue-gas temperature through corresponding superheater surface, prevent superheater tube overtemperature tube burst.
In order to improve evaporimeter heating surface flue gas flow rate, the cross section of described second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 reduces gradually.Can heat transfer efficiency be improved by above-mentioned setting, reduce heating surface consumption just now.Above-mentioned evaporimeter top also adopts steel plate to seal, and easy access and dust stratification on cleaning heating surface, sealing steel plate is connected on sidewall, prevents thermal expansion.Between above-mentioned evaporimeter, be also provided with inspection manhole and passage, so that staff overhauls simultaneously.
Further, described second evaporimeter 13, the 3rd evaporimeter 14, the 4th evaporimeter 15 are all to be made up of several pieces Σ shape heating surface tube groups 23; Described Σ shape heating surface tube group is made up of heating surface tube water inlet header 27, heating surface tube water outlet header 28 and Σ shape heating surface tube 24; Described heating surface tube water inlet header 27 is communicated with lower header 6, and described heating surface tube water outlet header 28 is communicated with upper collecting chamber 5.Adopt Σ shape heating surface tube can allow flue gas transversal flow heating surface, improve heat transfer efficiency.
In order to better realize the utility model, described body of heater 7 madial wall is provided with fin panel casing, allows evaporimeter joint angle weld seam be arranged in outside fin panel casing, and the sealing of employing right angle, described fin panel casing bottom sealing steel plate, prevent angle welding low-temperature-acid-corrosion.In addition, being provided with the steel plate for carrying out secondary seal in body of heater outside, preventing corrosion toxic gas SO
2leak.
The course of work of the present utility model: the flue gas of about 950 DEG C enters vertical gas pass by entering mouth, and flue gas carries out heat exchange by radiation, convection current and fin panel casing, and mine dust particle heavier in flue gas directly falls into ash bucket; Large cavity vertical gas pass flue gas adopts low flow velocity design, is convenient to mine dust particles settling; The flue gas dropping to about 850 DEG C enters horizontal flue, mine dust gravitate wherein, fall into ash bucket gradually, reach further dustproof function, the first evaporimeter heating surface of the first transversal flow horizontal flue of flue gas, these evaporator tube both sides are welded with band steel and make groove separator, both make heating surface area absorption portion heat, reached again dedusting object, reduce fouling of heating surface below, also have a free-revving engine to be exactly reduce the flue-gas temperature into superheater surface, prevent superheater tube overtemperature; And then flue gas transversal flow high and low temperature superheater, is provided with resistant to elevated temperatures wearing-resistant tile windward at high and low temperature superheater tube, can reduce superheater tube wearing and tearing.The flue gas dropping to about 600 DEG C enter horizontal flue second and third, four sections of evaporimeters, flue gas laterally rushes Σ shape heating surface tube, carry out heat exchange, every section of heating surface adopts variable cross-section design, improve heat transfer efficiency, thus improve the utilization rate of steel, flue-gas temperature is finally down to about 360 DEG C, discharges enter next process from exhanst gas outlet.At lower portion of furnace body, water-cooled ash bucket is set, which employs the oblique angle design of 70 degree, thoroughly stop dust stratification possibility, fall to water-cooled ash bucket mine dust particle temperature higher, mine dust particle carries out heat exchange by convection current and ash bucket water-cooling wall, and the mine dust particle after cooling enters induction system by ash discharging hole and enters next process.
What deserves to be explained is, what Fig. 2 left side and the right were cutd open is not a cross section, there is some intervals between the face cut.
According to above-described embodiment, just the utility model can be realized well.What deserves to be explained is; under prerequisite based on said structure design; for solving same technical problem; even if some making on the utility model are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the utility model, therefore it also should in protection domain of the present utility model.
Claims (10)
1. an energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite, it is characterized in that, comprise body of heater (7), what be arranged at body of heater (7) top, one end enters mouth (8), be arranged at the outlet flue (16) of body of heater (7) other end, to be arranged in body of heater (7) and to be positioned at into the vertical gas pass (9) below mouth, and being arranged at the horizontal flue (23) communicated with vertical gas pass (9) in body of heater (7); The first evaporimeter (10), high temperature superheater (11), low temperature superheater (12), the second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) is provided with successively in described horizontal flue (23); Described first evaporimeter (10) is near vertical gas pass (9), and described 4th evaporimeter (15) is near outlet flue (16); Described body of heater (7) top is also provided with and is positioned at the outside drum (4) of body of heater (7); Described drum (4) is provided with and is communicated with common downcomer (2) with it; Described drum (4) is connected with the second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) respectively; Described common downcomer (2) bottom is connected with the second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) respectively; Described body of heater (7) bottom is also provided with water-cooled ash bucket (18).
2. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 1, it is characterized in that, described second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) are communicated with drum (4) respectively by the upper collecting chamber be communicated with successively (5), carbonated drink tube connector (1); Described second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) are communicated with common downcomer (2) respectively by the lower header be communicated with successively (6), distributing pipe (3).
3. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 2, is characterized in that, the water outlet header (26) that described first evaporimeter (10) passing through is communicated with successively, carbonated drink tube connector (1) are communicated with drum (4); The water inlet header (25) that described first evaporimeter (10) passing through is communicated with successively, distributing pipe (3) are communicated with common downcomer (2).
4. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 3, is characterized in that, described first evaporimeter (9) is made up of several grooved pipe.
5. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 4, is characterized in that, described second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) are all to be made up of several pieces Σ shape heating surface tubes group (23); Described Σ shape heating surface tube group is made up of intake header (27), heating surface tube water outlet header (28) and Σ shape heating surface tube (24) of heating surface tube; Described heating surface tube water inlet header (27) is communicated with lower header (6), and described heating surface tube water outlet header (28) is communicated with upper collecting chamber (5).
6. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 5, is characterized in that, described water-cooled ash bucket (18) is separated into multiple ash bucket by partition wall (19), and below each ash bucket, be equipped with ash discharging hole (20); Described ash bucket top is also provided with gas baffle (17).
7. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 6, it is characterized in that, described water-cooled ash bucket (18) is provided with ash bucket water inlet header (29) and ash bucket water outlet header (30), and is also provided with bunker wall vibration device (22) on water-cooled ash bucket (19) sidewall.
8. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 7, it is characterized in that, described high temperature superheater (11), low temperature superheater (12), the second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) top are equipped with explosion deashing device (21).
9. energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to claim 8, is characterized in that, the cross section of described second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) reduces gradually.
10. the energy-saving dedusting waste heat boiler for sulfuric acid production by pyrite according to any one of claim 1 ~ 9, it is characterized in that, described body of heater (7) madial wall is provided with fin panel casing, described second evaporimeter (13), the 3rd evaporimeter (14), the 4th evaporimeter (15) connect weld bond and are arranged in outside fin panel casing, and are provided with the steel plate for carrying out secondary seal in body of heater outside.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520534971.4U CN204986938U (en) | 2015-07-22 | 2015-07-22 | Energy -conserving dust removal troilite exhaust -heat boiler |
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|---|---|---|---|
| CN201520534971.4U CN204986938U (en) | 2015-07-22 | 2015-07-22 | Energy -conserving dust removal troilite exhaust -heat boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605543A (en) * | 2016-02-03 | 2016-05-25 | 大连科林能源工程技术开发有限公司 | High-temperature high-dust content high-corrosion waste heat boiler of metallurgical industry |
| CN105716436A (en) * | 2016-03-24 | 2016-06-29 | 南通万达锅炉有限公司 | Mine heat furnace kiln waste heat recycling system |
| CN106287631A (en) * | 2016-09-30 | 2017-01-04 | 四川东华锅炉工程技术有限公司 | Energy-saving dedusting horizontal revolving kiln waste heat boiler |
| CN107654984A (en) * | 2017-10-10 | 2018-02-02 | 苏州海陆重工股份有限公司 | A kind of waste heat boiler |
| CN107975781A (en) * | 2016-10-25 | 2018-05-01 | 上海宜知节能环保科技有限公司 | Converter depth heat recovery boiler |
-
2015
- 2015-07-22 CN CN201520534971.4U patent/CN204986938U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605543A (en) * | 2016-02-03 | 2016-05-25 | 大连科林能源工程技术开发有限公司 | High-temperature high-dust content high-corrosion waste heat boiler of metallurgical industry |
| CN105716436A (en) * | 2016-03-24 | 2016-06-29 | 南通万达锅炉有限公司 | Mine heat furnace kiln waste heat recycling system |
| CN106287631A (en) * | 2016-09-30 | 2017-01-04 | 四川东华锅炉工程技术有限公司 | Energy-saving dedusting horizontal revolving kiln waste heat boiler |
| CN106287631B (en) * | 2016-09-30 | 2019-03-19 | 四川东华锅炉工程技术有限公司 | Energy-saving dedusting horizontal revolving kiln waste heat boiler |
| CN107975781A (en) * | 2016-10-25 | 2018-05-01 | 上海宜知节能环保科技有限公司 | Converter depth heat recovery boiler |
| CN107975781B (en) * | 2016-10-25 | 2020-04-24 | 江苏道和环保科技有限公司 | Deep waste heat recovery boiler of converter |
| CN107654984A (en) * | 2017-10-10 | 2018-02-02 | 苏州海陆重工股份有限公司 | A kind of waste heat boiler |
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