CN202272883U - Blast-furnace gas overbottom pressure turbine generating system - Google Patents
Blast-furnace gas overbottom pressure turbine generating system Download PDFInfo
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- CN202272883U CN202272883U CN2011203596653U CN201120359665U CN202272883U CN 202272883 U CN202272883 U CN 202272883U CN 2011203596653 U CN2011203596653 U CN 2011203596653U CN 201120359665 U CN201120359665 U CN 201120359665U CN 202272883 U CN202272883 U CN 202272883U
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Abstract
The utility model relates to the field of blast-furnace dry method dedusting and overbottom pressure turbine generating system, specifically to a blast-furnace gas overbottom pressure turbine generating system, comprising a gravitation precipitator, a bag-type dust collector, a pressure reducing valve set, a turbomachine, a generator, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, and a fifth pipeline. The blast-furnace gas overbottom pressure turbine generating system is characterized in that an output end of the fourth pipeline is communicated with a cold fluid input opening of a heat exchanger; a cold fluid output opening of the heat exchanger is communicated with a gas inlet of the turbomachine through a seventh pipeline; the fifth pipe is connected with an input end of a sixth pipeline through a three-way valve; an output end of the six pipeline is communicated with a gas input opening of a burner; the six pipeline is provided with a flow control valve; an air input opening of the burner is communicated with an eight pipeline; hot gas generated by the burner enters into a hot fluid input opening of the heat exchanger; and a hot fluid output opening of the heat exchanger is communicated with a ninth pipeline. The blast-furnace gas overbottom pressure turbine generating system mitigates or prevents salification in the turbomachine.
Description
Technical field
The utility model belongs to blast furnace gas dry dusting and overbottom pressure turbine power generation technical field, is specifically related to the blast-furnace top gas recovery turbine power generation system.
Background technology
Blast furnace gas dry dusting and overbottom pressure turbine power generation (TRT) system are the indispensable energy recovery systems of modern blast furnace, the 40-50% of the required electric energy of general recyclable blast furnace blowing engine, and economic benefit is very significantly.Blast furnace gas dry dusting has advantages such as efficiency of dust collection height, water saving, economize on electricity; Thereby and fully kept the generated energy that the pressure that blast furnace gas had can improve TRT with heat energy, but blast furnace gas dry coal gas dust removal technology can't the sour gas of easy fouling in the coal gas be removed, (mainly be that salification is serious in turbine two grade blades and the exhaust volute and in blast furnace gas pipeline especially TRT turbine, generate salification; The thickest 50-60mm that reaches); The salification meeting causes unit vibration on the turbine rotor, thereby causes serious accident, so necessary regular artificial scale removal; Basically each just need open the turbine cleaning once by two months; The unit maintenance workload that not only increases has also been wasted a large amount of blast-furnace top gas recovery abilities, brings enormous economic loss.Therefore, how preventing effectively and control TRT turbine salification problem, is the important topic that blast furnace gas dry dusting and overbottom pressure turbine power generation system are faced.
Summary of the invention
The purpose of the utility model is to provide a kind of blast-furnace top gas recovery turbine power generation system, and this system can reduce or avoid the inner salification of turbine.
To achieve these goals; The technical scheme of the utility model is: the blast-furnace top gas recovery turbine power generation system, and it comprises gravitational precipitator, sack cleaner, reducing valve group, turbine, generator, first pipeline, second pipeline, the 3rd pipeline, the 4th pipeline, the 5th pipeline; The input port of gravitational precipitator is connected with the coal gas output port of blast furnace by first pipeline; The output port of gravitational precipitator is connected with the input port of sack cleaner by second pipeline; The output port of sack cleaner links to each other with the 3rd pipeline; The 3rd pipeline is provided with the reducing valve group; Be connected through the input terminus of T-valve with the 4th pipeline on the 3rd pipeline between the output port of reducing valve group and sack cleaner, the pneumatic outlet of turbine links to each other with the 5th pipeline, and the clutch end of turbine is linked to each other with the power intake of generator by shaft coupling; It is characterized in that: the output terminal of the 4th pipeline is connected with the cold fluid input aperture of interchanger, and the cold fluid delivery port of interchanger is connected with the gas inlet of turbine by the 7th pipeline; Link to each other with the input terminus of the 6th pipeline through T-valve on the 5th pipeline, the output terminal of the 6th pipeline is connected with the coal gas input aperture of burner, and the 6th pipeline is provided with flowrate control valve; The air-in of burner is connected with the 8th pipeline, and the hot gas that burner produces gets into the hot-fluid input aperture of interchanger, and the hot-fluid delivery port of interchanger is connected with the 9th pipeline.
Described the 8th pipeline is connected with the cold fluid delivery port of air preheater; The cold fluid input aperture of air preheater is connected with the tenth pipeline; The 9th pipeline is connected with the hot-fluid input aperture of air preheater, and the hot-fluid delivery port of air preheater is connected with the 11 pipeline.
On the tenth pipeline, be provided with a flowrate control valve.
The staple of salification is NH in the turbine
4The Cl crystal, after coal gas got into turbine expansion acting, temperature can reduce gradually, when being lower than the dew point of steam, just had condensed water to form, at this moment some complicated ingredients such as the NH in the coal gas
4When Cl etc. meet water and dust below the turbine exhaust temperature is lower than its combination product dew point (about 80～90 ℃), can with solid form separate out and sound blade and casing inner wall attached to turbine on, accumulating over a long period just forms firm dirt layer.In unit running process along with the continuous assembly and the local shedding of dirt layer; The turbine rotor transient equilibrium is destroyed; Cause vibration exceeding the standard and the shutdown of reporting to the police, can only open turbine and clean salification, when increasing workload, also wasted a large amount of blast furnace gas pressure abilities.NH
4The Cl crystal begins to have tangible volatility at 120 ℃, and along with its volatility of temperature rising greatly improves, dissociates into ammonia and hydrogen chloride gas in the time of 337 ℃.So turbine inlet gas temperature should be higher than 120 ℃ and can not be above 337 ℃ as far as possible.When the TRT inlet air temperature is higher than 150 ℃, when exhaust temperature surpassed 90 ℃, the salification phenomenon can not take place in turbine basically.
The beneficial effect of the utility model is: heat turbine inlet coal gas (thereby heating gets into the gas temperature of turbine) through part turbine outlet blast furnace gas is burnt; Improve the generated energy of turbine, increased the power generation capacity of blast-furnace top gas recovery turbine power generation system; The rising of gas temperature simultaneously helps having reduced or has avoided salification in the turbine, thereby reduces the system maintenance amount, has improved the rate of utilization of turbine.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure, the 1-blast furnace; The 2-gravitational precipitator; The 3-sack cleaner; 4-reducing valve group; The 5-turbine; The 6-generator; The 7-burner; The 8-interchanger; The 9-air preheater; 10-flowrate control valve (meter); 11-first pipeline; 12-second pipeline; 13-the 3rd pipeline; 14-the 4th pipeline; 15-the 5th pipeline; 16-the 6th pipeline; 17-the 7th pipeline; 18-the 8th pipeline; 19-the 9th pipeline; 20-the tenth pipeline; 21-the 11 pipeline.
Embodiment
As shown in Figure 1, the blast-furnace top gas recovery turbine power generation system, it comprises gravitational precipitator 2, sack cleaner 3, reducing valve group 4, turbine 5, generator 6, first pipeline 11, second pipeline 12, the 3rd pipeline 13, the 4th pipeline 14, the 5th pipeline 15; The input port of gravitational precipitator 2 is connected by the coal gas output port of first pipeline 11 with blast furnace 1 (iron-smelting blast furnace); The output port of gravitational precipitator 2 is connected with the input port of sack cleaner 3 by second pipeline 12; The output port of sack cleaner 3 links to each other with the 3rd pipeline 13; The 3rd pipeline 13 is provided with reducing valve group 4; Being connected with the input terminus of the 4th pipeline 14 through T-valve on the 3rd pipeline 13 between the output port of reducing valve group 4 and sack cleaner 3, (in the prior art be: the output terminal of the 4th pipeline 14 directly is connected with the gas inlet of turbine 5; The coal gas in the 4th pipeline 14 is not heated), the pneumatic outlet of turbine 5 links to each other with the 5th pipeline 15, and the clutch end of turbine 5 is linked to each other by the power intake of shaft coupling with generator 6; The output terminal of the 4th pipeline 14 is connected with the cold fluid input aperture of interchanger 8; The cold fluid delivery port of interchanger 8 is connected with the gas inlet of turbine 5 by the 7th pipeline 17, and (cold fluid is a coal gas; Interchanger is the part heat transferred cold fluid with hot-fluid; Promptly the coal gas that gets into turbine 5 is heated), the gas temperature at the place, gas inlet of turbine 5 is 150～337 ℃, the gas temperature of the gas outlet of turbine 5 >=90 ℃; Link to each other with the input terminus of the 6th pipeline 16 through T-valve on the 5th pipeline 15; The output terminal of the 6th pipeline 16 is connected with the coal gas input aperture of burner 7, and the 6th pipeline 16 is provided with flowrate control valve 10 and (is used to control the gas temperature that the coal gas amount that gets into burner 7 is regulated the place, gas inlet of turbine 5; Can establish TP at the place, gas inlet of control turbine 5); The air-in of burner 7 be connected with the 8th pipeline 18 (output terminal of the 8th pipeline 18); The hot gas that burner 7 produces gets into the hot-fluid input aperture (hot-fluid is the hot gas after the blast furnace gas burning) of interchanger 8, the hot-fluid delivery port of interchanger 8 be connected with the 9th pipeline 19 (input terminus of the 9th pipeline 19).
Described the 8th pipeline 18 be connected with the cold fluid delivery port of air preheater 9 (cold fluid is an air); The cold fluid input aperture of air preheater 9 is connected with the tenth pipeline 20; The 9th pipeline 19 is connected with the hot-fluid input aperture of air preheater 9, and the hot-fluid delivery port of air preheater 9 is connected with the 11 pipeline 21.
Working process:
1. the coal gas of blast furnace 1 generation at first passes through thick dedusting of gravitational precipitator 2 (or tornado dust collector) and sack cleaner 3 smart dedustings; The heat release of in burner 7, burning of the part purified gas of turbine 5 outlet; Through the blast furnace gas of interchanger 8 heating turbine inlets, the blast furnace gas of HTHP drives generator 6 through turbine 5 can become electric energy with thermal power transfer with pressure; The effect of air preheater 9 is the thermo-efficiency that improves burner 7; At the turbine power generation system overhaul or when breaking down, purified gas makes gas pressure drop to suitable level through reducing valve group 4, sends into gaspipe network then.
2. control the gas temperature that turbine 5 enters the mouth through regulating the coal gas amount and the air capacity that get into burner 7.The gas temperature of turbine inlet should be higher than 150 ℃ all the time, and temperature of exit gas is about 90 ℃, and can guarantee can salification in the turbine.Simultaneously, turbine inlet gas temperature improves 10 ℃, and the TRT generated energy can improve 3～5%.
Adopt the blast-furnace top gas recovery turbine power generation system of the utility model, move after 3 months, detect salification situation in turbine two grade blades and the exhaust volute, detected result shows, no salification in turbine two grade blades and the exhaust volute.
On the tenth pipeline 20, be provided with a flowrate control valve, when control turbine 5 temperature ins, control simultaneously gets into the coal gas and the air capacity of burner 7.
Claims (3)
1. blast-furnace top gas recovery turbine power generation system, it comprises gravitational precipitator (2), sack cleaner (3), reducing valve group (4), turbine (5), generator (6), first pipeline (11), second pipeline (12), the 3rd pipeline (13), the 4th pipeline (14), the 5th pipeline (15); The input port of gravitational precipitator (2) is connected by the coal gas output port of first pipeline (11) with blast furnace (1); The output port of gravitational precipitator (2) is connected by the input port of second pipeline (12) with sack cleaner (3); The output port of sack cleaner (3) links to each other with the 3rd pipeline (13); The 3rd pipeline (13) is provided with reducing valve group (4); The 3rd pipeline (13) between the output port of reducing valve group (4) and sack cleaner (3) is gone up and is connected through the input terminus of T-valve with the 4th pipeline (14), and the pneumatic outlet of turbine (5) links to each other with the 5th pipeline (15), and the clutch end of turbine (5) is linked to each other by the power intake of shaft coupling with generator (6); It is characterized in that: the output terminal of the 4th pipeline (14) is connected with the cold fluid input aperture of interchanger (8), and the cold fluid delivery port of interchanger is connected by the gas inlet of the 7th pipeline (17) with turbine (5); The 5th pipeline (15) is gone up through T-valve and is linked to each other with the input terminus of the 6th pipeline (16), and the output terminal of the 6th pipeline (16) is connected with the coal gas input aperture of burner (7), and the 6th pipeline (16) is provided with flowrate control valve (10); The air-in of burner (7) is connected with the 8th pipeline (18), and the hot gas that burner (7) produces gets into the hot-fluid input aperture of interchanger (8), and the hot-fluid delivery port of interchanger (8) is connected with the 9th pipeline (19).
2. blast-furnace top gas recovery turbine power generation system according to claim 1; It is characterized in that: described the 8th pipeline (18) is connected with the cold fluid delivery port of air preheater (9); The cold fluid input aperture of air preheater (9) is connected with the tenth pipeline (20); The 9th pipeline (19) is connected with the hot-fluid input aperture of air preheater (9), and the hot-fluid delivery port of air preheater (9) is connected with the 11 pipeline (21).
3. blast-furnace top gas recovery turbine power generation system according to claim 2 is characterized in that: the tenth pipeline (20) is provided with a flowrate control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203596653U CN202272883U (en) | 2011-09-23 | 2011-09-23 | Blast-furnace gas overbottom pressure turbine generating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203596653U CN202272883U (en) | 2011-09-23 | 2011-09-23 | Blast-furnace gas overbottom pressure turbine generating system |
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| CN202272883U true CN202272883U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203596653U Expired - Lifetime CN202272883U (en) | 2011-09-23 | 2011-09-23 | Blast-furnace gas overbottom pressure turbine generating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304595A (en) * | 2011-09-23 | 2012-01-04 | 中冶南方工程技术有限公司 | Top gas pressure recovery turbine generating system |
-
2011
- 2011-09-23 CN CN2011203596653U patent/CN202272883U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304595A (en) * | 2011-09-23 | 2012-01-04 | 中冶南方工程技术有限公司 | Top gas pressure recovery turbine generating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120613 Effective date of abandoning: 20131030 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120613 Effective date of abandoning: 20131030 |
|
| RGAV | Abandon patent right to avoid regrant |