CN86103986A - Dry dust separation method for ferroalloy closed electrical furnace - Google Patents
Dry dust separation method for ferroalloy closed electrical furnace Download PDFInfo
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- CN86103986A CN86103986A CN86103986.6A CN86103986A CN86103986A CN 86103986 A CN86103986 A CN 86103986A CN 86103986 A CN86103986 A CN 86103986A CN 86103986 A CN86103986 A CN 86103986A
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Abstract
The present invention relates to a kind of sealing silicon manganese alloy furnace gas dry dust-removing method, its technical process is: coal gas purifies coal gas again through cooling through gravitational dust collection, cooling, sack cleaner udst separation, is sent to gas-holder after the dehydration.
The present invention has avoided producing the sewage and the mud of secondary pollution, thereby has avoided disposing of sewage and the facility of mud, reduces investment outlay and working cost, reduces occupation area of equipment.
Description
The present invention relates to a kind of coal gas dust removal method, particularly seal silicon-manganese alloy electric furnace coal gas dry-method method for dust removal.
Produce a large amount of versatile coal gas in the sealing iron alloy electric furnace production process, but in the coal gas dust content up to 40g/m
3Recycle, must be through dust removal process.In addition, also contain callable useful matter in the coal gas flue dust.
At present, seal iron alloy electric furnace coal gas both at home and abroad and generally adopt the wet dedusting method.The method of this kind wet dedusting mainly washes coal gas with water, to reach dust separating purpose.The problem that this method exists is a running energy consumption cost height, particularly produces the sewage and the mud of a large amount of secondary pollutions.Contain harmful and noxious substance in this sewage, its content surpasses emission standard, can not directly discharge or return use, and must could discharge or return use after treatment.Mud also must could reclaim wherein useful material after treatment.Handle this sewage and mud, need huge facility and higher working cost.
The purpose of this invention is to provide a kind of sealing silicon manganese alloy furnace coal gas in the method eliminating method, according to said method, can avoid producing secondary pollution, thereby avoid expensive sewage and sludge treatment facility investment, reduce working cost.
Solution of the present invention is: sealing silicon manganese alloy furnace coal gas dust removal is by settling pocket, and the dust-removal system that straight pipe and air cooling pipe, sack cleaner, water cooler, dehydration tower, roots blower, gas-holder are formed is finished.
Its dust collecting process flow process is: coal gas has entered with inert gas replacements such as nitrogen the dust-removal system of air by electric furnace, through the settling pocket gravitational dust collection, remove the above thick dirt of 100u, straight pipe and the cooling of air cooling pipe, the sack cleaner udst separation, the coal gas that purifies is again through the water cooler cooling, and the dehydration tower dehydration is sent to gas-holder by roots blower.
The regulation system that the pressure, temperature, inlet that coal gas enters dust-removal system is made up of the butterfly valve of the butterfly valve of the return line in the dust-removal system and bleeder is regulated, and this regulation system can be manual, also can control automatically.Electric furnace outlet enters the dust-removal system temperature of gas and is controlled at 500～600 ℃, and pressure-controlling is at-0.5-1mmH
2O contains O
2Less than 1.2%.
The flue dust that the sack cleaner ash bucket is collected adopts the nitrogen-sealed dry type to unload grey method and unloads ash.When not unloading ash, the mechanical end cap seal of unloading valve prevents air admission coal gas, avoids ash bucket and cloth bag flue dust autoignition sintered.
The water of condensation that coal gas produces in the water cooler adopts Sealing Method to get rid of.
The explosion-proof employing dry type film explosion-proof method of dust-removal system.Membrane unit is set in the dust-removal system, surrounds with sand around crown cap of film overcoat, crown cap, when oxygen level in the dust-removal system surpassed permissible value, film at first burst, and crown cap falls sealing.
The passage of coal gas is equipped with a dry type water seal stopping valve between electric furnace and the dust-removal system, and one when dust-removal system breaks down or when needing parking maintenance, and dry type water seal stopping valve can cut off coal gas and enter dust-removal system.
The present invention seals the silicon manganese alloy furnace gas dry dust-removing method, has avoided producing the sewage and the mud of secondary pollution, thereby has avoided disposing of sewage and the huge facility of mud.Compare with the wet dedusting method, can reduce investment outlay 40%, save working cost 40%, reduce occupation area of equipment 50%.The coal gas dust content can be by 40g/m
3More than drop to 20mg/m
3, flue dust can be for directly recycling.
The method for dust removal of invention is provided by following embodiment and accompanying drawing thereof.
Accompanying drawing is the invented technology schema
With the air in the nitrogen replacement dust-removal system, the pressure of regulating electric furnace (1) burner hearth coal gas with regulation system (5) is at-0.5-1mmH
2O, temperature out 500-600 ℃, oxygen level are less than in 1.2% the numerical range.Coal gas enters settling pocket (2), through the gravity depositing dust, removes the above thick dirt of 100u.Coal gas enters straight pipe and air cooling pipe (3) cooling behind gravitational dust collection, temperature is reduced to 160～200 ℃, the coal gas of reducing to 160-200 ℃ enters sack cleaner (6) udst separation, sack cleaner (6) adopts and purifies the coal gas reverse gas cleaning, and flue dust collecting is in the ash bucket (7) of sack cleaner (6) below.Connect a surge tank (8) under the ash bucket (7), surge tank (8) is gone up star valve (9) that advances ash from ash bucket (7) of termination, following termination one star-shaped ash unloading valve (10), when unloading ash, charge into surge tank (8) with nitrogen, make to form 0.1 normal atmosphere in the surge tank (8), prevent air admission sack cleaner (6), guarantee that again coal gas does not leak, advance grey star valve (9) and unload grey star valve (10) and move simultaneously.Because (8) nitrogen has only 0.1 normal atmosphere in the surge tank, flue dust in the ash bucket (7) is fallen by advancing grey star valve (9), flue dust is drawn off from unloading grey star valve (10), and can also play the effect of loose ash bucket (7) flue dust, when not unloading ash, the grey star valve (10) that unloads of surge tank (8) adopts mechanical end cap (11) sealing, and the flue dust that prevents the flue dust of ash bucket (7) and sack cleaner (6) is autoignition sintered and cause that cloth bag burns out because of air admission.
Coal gas after sack cleaner (6) udst separation enters further cooling of water cooler (16), temperature is reduced to below 60 ℃, and the moisture content in the entrained electric furnace raw material is separated out in condensation.The water of condensation that water cooler (16) accumulates adopts Sealing Method eliminating water cooler (16) to link to each other with a water storing tank (14), is equipped with one on the water storing tank from the water intaking valve (15) of water cooler (16) water inlet and the water discharge valve (13) of eliminating water of condensation.During draining, charge into water storing tank (14) with nitrogen, water intaking valve (15) is closed, treat that water of condensation in the water storing tank (14) has been arranged after, the water discharge valve (13) of closing water storing tank (14).Open the water intaking valve (15) of water storing tank (14) then, stop to fill nitrogen.This method also can be dredged mud.
Enter further dehydration of dehydration tower (17) through cooled purification coal gas, the purification coal gas after the dehydration is sent to gas-holder (19) by roots blower (18).
Claims (7)
1, a kind of sealing silicon manganese alloy furnace gas dry dust-removing method can be to dust content 40g/m
3Above coal gas drops to 20mg/m by dedusting with dust content
3Below, this method is characterised in that:
A, with the air in the inert gas replacement dust-removal systems such as nitrogen, allow electric furnace coal gas enter dust-removal system, and the interior gas pressure of electric furnace [1] be controlled at-0.5-1mmH with Controlling System [5]
2O is in the numerical range of temperature＜600 ℃.
B, after (A) step, coal gas enters settling pocket [2], carries out gravitational dust collection, removes the above thick dirt of 100 μ.
C, the coal gas after (B) step enter straight pipe and air cooling pipe [3], lower the temperature, and make gas temperature reduce to 160～200 ℃.
D, the flue gas after (C) step enter sack cleaner [6] dedusting, and sack cleaner [6] is with purifying the coal gas reverse gas cleaning, and the dust stratification of ash bucket [7] unloads grey method with nitrogen sealing gland dry type and unloads ash.
E, the coal gas after (D) step enter water cooler [16], and gas temperature is reduced to below 60 ℃, get rid of with Sealing Method at the water of condensation of this generation.
F, the coal gas after (E) step enter dehydration tower [17] dehydration.
G, the coal gas after (F) are sent to coal gas gas-holder [19] by roots blower [18].
2, according to the method for dust removal of claim 1, it is characterized in that pressure, temperature that electric furnace (1) coal gas enters dust-removal system are to regulate by the regulation system of being made up of return line butterfly valve (4) bleeder butterfly valve (12) (5), regulation system (5) but automatic or manual.
3, according to the method for dust removal of claim 1, it is characterized in that nitrogen sealing gland dry type unloading grey method, to unload ash be to be connected one with ash bucket (7) by a upper end to advance grey star, shape valve (9), one of following termination is unloaded the surge tank (8) of grey star valve (10), and charge in it with nitrogen, produce 0.1 normal atmosphere, advance grey star valve (9) and unload grey star valve (10) and move simultaneously and to realize.
4,, it is characterized in that unloading valve (10) adopts mechanical end cap (11) sealing according to the method for dust removal of claim 3.
5, according to the method for dust removal of claim 1, it is characterized in that Sealing Method eliminating water coolant links to each other with water cooler (16) by one, the water storing tank (14) of a water intaking valve (15) and a water discharge valve (13) is housed, and realize with nitrogen-sealed water storing tank (14).
6, a kind of sealing silicon manganese alloy furnace gas dry dust-removing method can be to dust content 40g/m
3Above coal gas drops to 20mg/m by dedusting with dust content
3Below, it is characterized in that the explosion-proof employing dry type film device of dust-removal system is explosion-proof.
7, a kind of sealing silicon manganese alloy furnace gas dry dust-removing method can be to dust content 40g/m
3Above coal gas drops to 20mg/m by dedusting with dust content
3Below, it is characterized in that the gas flue between electric furnace and the dust-removal system cuts off employing dry type water seal stopping valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86103986 CN1019671B (en) | 1986-06-05 | 1986-06-05 | Dry dust separation method for ferroalloy closed electrical furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86103986 CN1019671B (en) | 1986-06-05 | 1986-06-05 | Dry dust separation method for ferroalloy closed electrical furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86103986A true CN86103986A (en) | 1987-12-16 |
| CN1019671B CN1019671B (en) | 1992-12-30 |
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ID=4802271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86103986 Expired CN1019671B (en) | 1986-06-05 | 1986-06-05 | Dry dust separation method for ferroalloy closed electrical furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019671B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260322B (en) * | 2006-08-29 | 2011-11-02 | 包头钢铁（集团）有限责任公司 | Blast furnace gas dust removing device and technique by dry method |
| CN102260539A (en) * | 2011-07-01 | 2011-11-30 | 中冶赛迪工程技术股份有限公司 | COREX shaft furnace gas dry process cloth bag dust removal and energy recycling method and system |
| CN103528388A (en) * | 2013-10-28 | 2014-01-22 | 中钢集团天澄环保科技股份有限公司 | Closed ferroalloy furnace coal gas dry method purification and recovery system |
-
1986
- 1986-06-05 CN CN 86103986 patent/CN1019671B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260322B (en) * | 2006-08-29 | 2011-11-02 | 包头钢铁（集团）有限责任公司 | Blast furnace gas dust removing device and technique by dry method |
| CN102260539A (en) * | 2011-07-01 | 2011-11-30 | 中冶赛迪工程技术股份有限公司 | COREX shaft furnace gas dry process cloth bag dust removal and energy recycling method and system |
| CN102260539B (en) * | 2011-07-01 | 2013-06-19 | 中冶赛迪工程技术股份有限公司 | COREX shaft furnace gas dry process cloth bag dust removal and energy recycling method and system |
| CN103528388A (en) * | 2013-10-28 | 2014-01-22 | 中钢集团天澄环保科技股份有限公司 | Closed ferroalloy furnace coal gas dry method purification and recovery system |
| CN103528388B (en) * | 2013-10-28 | 2015-04-22 | 中钢集团天澄环保科技股份有限公司 | Closed ferroalloy furnace coal gas dry method purification and recovery system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1019671B (en) | 1992-12-30 |
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