CN109234483A - A kind of blast furnace gas integrated treatment reclaimer - Google Patents
A kind of blast furnace gas integrated treatment reclaimer Download PDFInfo
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- CN109234483A CN109234483A CN201811275921.3A CN201811275921A CN109234483A CN 109234483 A CN109234483 A CN 109234483A CN 201811275921 A CN201811275921 A CN 201811275921A CN 109234483 A CN109234483 A CN 109234483A
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- gas
- spray
- blast furnace
- caustic scrubber
- lye
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Separation Of Particles Using Liquids (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a kind of blast furnace gas integrated treatment reclaimers, including blast furnace roof feed pot (1), cyclone dust collectors (4), spray caustic scrubber (13) and dehydrater (15), the pressure gas exit of blast furnace roof feed pot (1) is connect by gas pipeline with the entrance of cyclone dust collectors (4), the outlet of cyclone dust collectors (4) is connect by pressure coal-gas recovering pipeline with the pressure gas entry for spraying caustic scrubber (13), the emission coal gas outlet of blast furnace roof feed pot (1) is connect by emission coal gas recovery channel with the emission coal gas entrance for spraying caustic scrubber (13), the moisture-laden gas outlet of spray caustic scrubber (13) is connect by gas conveying tube line with the entrance of dehydrater (15).The blast furnace gas integrated treatment reclaimer had both been able to achieve the spray alkali deacidification processing of stock gas, has pressed the cleaning dust processing and recycling of coal gas, was also able to achieve the dedusting deacidification processing to big emission coal gas.
Description
Technical field
The present invention relates to steel smelting equipment field, a kind of particularly blast furnace gas integrated treatment reclaimer.
Background technique
Normally producing the coal gas discharged for a long time with blast furnace ironmaking includes two parts: from batch can when a part is top charging
The coal gas of discharge referred to as presses coal gas, and another part is that the coal gas that chemical reaction is discharged from furnace roof occurs for crude fuel in blast furnace, claims
For stock gas.When blast furnace produces because cause specific interrupts, is out-of-blast, the coal gas of furnace roof discharge is known as big emission coal gas.
Furnace top even pressure coal gas necessary to blast fumance be all before each charging by cyclone dust collectors and muffler after
It is diffused into atmosphere and (idle discharge is put 300 times or so daily), pressure coal gas is containing a large amount of CO, CO2With dust it is toxic, can
Combustion things mixed gas, the amount of diffusin of pressure coal gas are 6-8Nm3/ ton iron, dustiness are more than 10g/Nm3, China produces molten iron every year
About 700,000,000 tons are produced, is up to 5,500,000,000 m via gas volume of the blast furnace top pressure-equalizing bleeding equipment exhausting into atmosphere3/ year, blast furnace gas
Unit price presses 0.11 yuan/Nm3It calculates, economic loss caused by this part coal gas is about 600,000,000 yuan/year, and the Dust Capacity of discharge reaches 5.5
Ten thousand tons/year.The pressure coal gas of blast furnace ironmaking production process is directly discharged into atmosphere, not only causes air environmental pollution, while also unrestrained
The energy is taken.
There are many technologies that the recycling for pressing blast furnace roof coal gas may be implemented both at home and abroad, some has been achieved for good
Good effect, such as Chinese patent CN102031321A, April 27 2011 publication date, " blast furnace roof presses coal gas to disclosed one kind
Recovery method and recyclable device ".But these technologies require additionally to increase on the basis of original blast furnace system it is dedicated
Coal gas dust removal equipment is pressed, realizes and is recycled again to after the dedusting for pressing coal gas.It is enterprising in original place for most of needs
For the blast furnace system of row transformation, the occupied area of transformation process and additional equipment investment are the major issues being hard to avoid.
Blast furnace in process of production, needs to interrupt ironmaking production, scheme of arrangement according to maintenance, processing accident sometimes
Damping down, such as the cooling wall of damage is handled, need level-lowering to fetch water at this time；Sometimes because other reasons interrupt ironmaking production, into
The unplanned damping down of row.In damping down, blast furnace stops air blast, stops injected fuel, and original crude fuel reaction is insufficient in blast furnace,
Along with the operation such as fetch water because of level-lowering, the gas composition being discharged at this time is complicated, includes a large amount of vapor, large dust particle, H2、
CH4、CO、CO2、N2.The coal gas generated after blast furnace staying operation is because humidity is big, temperature is high, complicated component, dustiness are big, dust
The features such as granularity is big, explosive, does not meet recycling and requires.Emission coal gas big for this part is not suitable for blast fumance process
In bag filter be dusted, never good processing mode both at home and abroad, can only open bleeding valve carry out it is big
Big emission coal gas containing a large amount of dust pollutant, is directly discharged into atmosphere, causes serious air pollution by release processing.
Many iron and steel enterprises are to reduce coke ratio blowing bituminous coal or anthracite to some extent, and some iron and steel enterprises are using sprinkling
The imported raw material mine of seawater is crossed, some iron and steel enterprises are to improve sinter strength to use the (CaCl of auxiliary agent containing chlorine2Deng), due to above
A variety of causes contains a large amount of acid medium (chloride ions in the stock gas that domestic many iron and steel enterprises generate in process of production
And sulfate ion).
With the enlargement of blast furnace and the raising of furnace top pressure, blast furnace gas purification method is developed from wet type to dry type, most
" blast furnace ironmaking engineering design code " (GB50427-2015) of new edition clearly recommend " blast furnace gas purification design preferably use dry method
Bag-type dusting technique ", therefore, the country generally use the purification that dry bag-type dust remover completes stock gas.Dry dust removal cannot
The acid medium in stock gas is purified, these acid mediums form strongly acidic solution after meeting water, cause seriously to gas piping
Corrosion." blast furnace ironmaking engineering design code " (GB50427-2015) recommends " in the corrosive substances content such as purified gas chloride ion
When higher, into full factory's gaspipe network before be preferably arranged lye spray column etc. control coal gas in chloride ion content facility ".For this
Kind situation, domestic many iron and steel enterprises are while application coal gas full dry cloth-bag dusting technology, using spray washing tower (for removing CO2) as stock gas
Dechlorination device, such as Chinese patent CN201864738U, June 15 2011 publication date, disclosed one kind " blast furnace coal gas blowout
Alkali dechlorination device ".
Blast fumance requires to solve the corrosion problems of stock gas in technique, requires to solve to press coal gas in environmental protection
Dedusting and recycling problem, solves the problems, such as big emission coal gas dedusting deacidify.By being analyzed above it is found that the prior art is for putting greatly
The not no good processing method of scattered coal gas, is all directly to put to idle discharge；Coal gas is pressed for blast furnace roof, although the prior art is
Many recovery methods are provided, but require additionally to increase dedicated pressure coal gas dust removal equipment, are faced in transformation process
Occupied area and the important problem of extras investment.As the spray washing tower (for removing CO2) for eliminating acid medium in coal gas, only there is spray alkali to remove
The simple function of acid.
Summary of the invention
In order to complete the dedusting deacidification to blast furnace gas.The present invention provides a kind of blast furnace gas integrated treatment recycling to set
Standby, there is the spray caustic scrubber in the blast furnace gas integrated treatment reclaimer cleaning dust, spray alkali to remove acid function, it is not necessary to increase
Additional pressure coal gas dust removal equipment, top gas and pressure coal gas is introduced directly into spray caustic scrubber, is both able to achieve furnace
The spray alkali deacidification processing of top coal gas, the cleaning dust processing and recycling for pressing coal gas, are also able to achieve the dedusting to big emission coal gas
Deacidification processing.
The present invention solves technological invention used by its technical problem: a kind of blast furnace gas integrated treatment reclaimer,
Including blast furnace roof feed pot, cyclone dust collectors, spray caustic scrubber and dehydrater, the pressure gas exit of blast furnace roof feed pot
Connected by the entrance of gas pipeline and cyclone dust collectors, the outlets of cyclone dust collectors by pressure coal-gas recovering pipeline with
The pressure gas entry connection of caustic scrubber is sprayed, the emission coal gas outlet of blast furnace roof feed pot passes through emission coal gas recovery channel
It is connect with the emission coal gas entrance of spray caustic scrubber, the moisture-laden gas outlet for spraying caustic scrubber passes through gas conveying tube line and water removal
The entrance of device connects.
Spray caustic scrubber in containing set gradually from bottom to top air-flow uniform device, lye spray equipment, demister, on
Portion's spray equipment and de-watering apparatus, along the vertical direction, the air-flow uniform device contain at least one layer of gas grid, the lye
Spray equipment contains at least one lye spraying layer.
Spray caustic scrubber is upright tubular structure, a lye spraying layer contain along spray caustic scrubber it is circumferential uniformly between
Every more root long spray guns of arrangement and short spray gun, every root long spray gun and short spray gun being arranged radially along spray caustic scrubber, every root long
High-pressure atomization spray head is equipped on spray gun and short spray gun.
The lye spray equipment contains multiple lye spraying layers, in two adjacent lye spraying layers, a lye
The injection direction of high-pressure atomization spray head in spraying layer is whole upward, the spray of the high-pressure atomization spray head in another lye spraying layer
It is whole downward to penetrate direction.
Lye spray equipment lye spraying layer containing there are four, four lye spraying layers are according to order from bottom to top
It is followed successively by the first lye spraying layer, the second lye spraying layer, third lye spraying layer and the 4th lye spraying layer.
All upward, second lye sprays the injection direction of high-pressure atomization spray head in the first lye spraying layer
The injection direction of high-pressure atomization spray head in layer is whole downward, the injection of the high-pressure atomization spray head in the third lye spraying layer
All upward, the injection direction of the high-pressure atomization spray head in the first lye spraying layer is whole downward in direction.
It can be filler water removal dress to the nozzle of demister injection water, de-watering apparatus that top spray equipment, which contains multiple,
It sets, de-watering apparatus is located at the top of spray caustic scrubber, and spray caustic scrubber also contains emission coal gas outlet, the emission coal gas outlet
The top of spray caustic scrubber is respectively positioned on moisture-laden gas outlet, the emission coal gas outlet is externally connected with scrubbing tower diffusion valve.
The bottom for spraying caustic scrubber is equipped with sewage draining exit, and the lower section outside the sewage draining exit is equipped with sewage-treatment plant, sprays neutralizing treatment
Tower also contains stock gas entrance, and the stock gas entrance for spraying caustic scrubber is externally connected with stock gas recovery channel, the furnace roof
Coal-gas recovering pipeline is equipped with stock gas shut-off valve.
Described press is provided with thermometer, flowmeter, pressure gauge and presses coal gas recovery valve, whirlwind on coal-gas recovering pipeline
The outlet of deduster is connected with muffler and a balanced pressure system, the gas pipeline in parallel and is connected with concatenated nitrogen
The outlet of tank and secondary balanced pressure system, dehydrater is connect with clean coal gas pipe network.
The beneficial effects of the present invention are:
1, it can complete that the cleaning dust processing for pressing coal gas is simplified and the process flow of coal-gas recovering, reduction is pressed to account for
Ground area.
2, dedusting and the deacidification processing to big emission coal gas can be completed, air pollution is reduced.
3, the spray alkali deacidification processing to stock gas can be completed, its corrosion to gas piping is reduced.
4, spray caustic scrubber structure is simple, cheap, maintenance cost is low.
5, spray caustic scrubber movable member is few, is not susceptible to failure, and operating rate is high.
6, pressure coal gas detects pressure, temperature and the flow of pressure coal gas and is timely fed back to before entering spray caustic scrubber
Blast furnace central control system can optimize blast furnace operating, promote smooth operation of furnace.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.
Fig. 1 is the structural schematic diagram of blast furnace gas integrated treatment reclaimer of the present invention.
Fig. 2 is the structural schematic diagram of spray caustic scrubber of the present invention.
Fig. 3 is the structural schematic diagram of a lye spraying layer.
1, blast furnace roof feed pot；2, secondary equalizing valve；3, nitrogen gas tank；4, cyclone dust collectors；5, an equalizing valve；6, disappear
Sound device；7, pressure equalizing blow off valve；8, thermometer；9, flowmeter；10, pressure gauge；11, coal gas recovery valve is pressed；12, scrubbing tower diffuses
Valve；13, caustic scrubber is sprayed；14, caustic scrubber shut-off valve is sprayed；15, dehydrater；16, check-valves；17, clean coal gas pipe network；18, furnace
Push up diffusion valve；19, big emission coal gas shut-off valve；20, stock gas shut-off valve；21, sewage-treatment plant；22, primary pressure system
System；23, secondary balanced pressure system；
31, de-watering apparatus；32, spray equipment；33, demister；34, high-pressure atomization spray head；35, gas grid；36, lye
Spraying layer；37, long spray gun；38, short spray gun.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of blast furnace gas integrated treatment reclaimer, including blast furnace roof feed pot 1, cyclone dust collectors 4, spray neutralizing treatment
Tower 13 and dehydrater 15, pressure gas exit the entering by gas pipeline and cyclone dust collectors 4 of blast furnace roof feed pot 1
The outlet of mouth connection, cyclone dust collectors 4 is connect by pressure coal-gas recovering pipeline with the pressure gas entry of spray caustic scrubber 13,
The emission coal gas entrance that the emission coal gas outlet of blast furnace roof feed pot 1 passes through emission coal gas recovery channel and spray caustic scrubber 13
The moisture-laden gas outlet of connection, spray caustic scrubber 13 is connect by gas conveying tube line with the entrance of dehydrater 15, such as Fig. 1 institute
Show.
In the present embodiment, it is sprayed in spray caustic scrubber 13 containing air-flow uniform device, the lye set gradually from bottom to top
Shower device, demister 33, top spray equipment 32 and de-watering apparatus 31, along the vertical direction, the air-flow uniform device contain to
Few one layer of gas grid 35, the lye spray equipment contain at least one lye spraying layer 36, as shown in Figure 2.
In the present embodiment, the pressure gas entry and emission coal gas entrance for spraying caustic scrubber 13 are located at spray caustic scrubber 13
Lower part, the air-flow uniform device is located at the top for pressing gas entry and emission coal gas entrance, and the air-flow uniformly fills
It sets containing three layers of gas grid 35, the angle for the setting that is staggered between two layers adjacent of gas grid 35, to make to enter in tower
Blast furnace gas is evenly distributed on the cross section in entire tower.
In the present embodiment, spray caustic scrubber 13 is in upright tubular structure, and lye spraying layer 36 contains along spray neutralizing treatment
The multiple long spray guns 37 and short spray gun 38 of the circumferential uniform intervals arrangement of tower 13, long spray gun 37 intersect in spray caustic scrubber 13
Heart line position, long spray gun 37 and short spray gun 38 are column structure, and the length of long spray gun 37 is greater than the length of short spray gun 38, long spray
Rifle 37 and being arranged radially along spray caustic scrubber 13 of short spray gun 38, i.e., the length direction of long spray gun 37 and the length of short spray gun 38
Direction being arranged radially along spray caustic scrubber 13, is equipped with multiple high-pressure atomization spray heads 34 on long spray gun 37 and short spray gun 38,
As shown in Figure 3.
In the present embodiment, the lye spray equipment contains multiple lye spraying layers spaced along the vertical direction
36, in two adjacent lye spraying layers 36, the injection direction of the high-pressure atomization spray head 34 in a lye spraying layer 36 is complete
Upward, the injection direction of the high-pressure atomization spray head 34 of another lye spraying layer 36 is whole downward in portion.For example, the lye spray
Device lye spraying layer 36 containing there are four, as shown in Fig. 2, four lye spraying layers 36 are followed successively by according to order from bottom to top
First lye spraying layer, the second lye spraying layer, third lye spraying layer and the 4th lye spraying layer.
The injection direction of high-pressure atomization spray head 34 in the first lye spraying layer is whole upward, the second lye spraying layer
In high-pressure atomization spray head 34 injection direction all downward, the injection of the high-pressure atomization spray head 34 in the third lye spraying layer
All upward, the injection direction of the high-pressure atomization spray head 34 in the first lye spraying layer is whole downward in direction.Spray caustic scrubber
13 bottom is equipped with sewage draining exit, and there is sewage-treatment plant 21 in the lower section outside the sewage draining exit.Blast furnace gas integrated treatment reclaimer
The dust-laden sewage generated after gas treatment obtains sludge and Ke Xunhuanliyong middle water after the sewage-treatment plant 21 processing.
According to process requirements, multiple lye spraying layers 36 and its subsidiary high-pressure atomization spray head are arranged on different height
34.Lye forms spray pattern inside spray caustic scrubber 13 after the ejection of high-pressure atomization spray head 34, and fogged lye is uniformly covered with
Spray the inner space of caustic scrubber 13.High-pressure atomization spray head 34 sprays the lye of high-pressure atomization state, realizes the dechlorination to coal gas
Processing.
Acid dust-laden blast furnace gas from spray caustic scrubber 13 lower side gas entry (including press gas entry,
Emission coal gas entrance and stock gas entrance) enter spray caustic scrubber 13, under the action of fogged lye, complete deacidification, dedusting
Processing:
1, spray alkali deacidification processing: the acid medium being covered in the fogged lye and coal gas of spray 13 inner space of caustic scrubber fills
Reaction is divided to eliminate gas corrosion.
2, cleaning dust is handled: due to inertial collision, interception and the cohesion between fogged lye and gas dust, compared with
The dust of bulky grain relies on gravitational settling with atomization washing, drains together with cleaning solution, into the row of spray 13 bottom of caustic scrubber
Sewage-treatment plant 21 outside dirty mouth.It can be followed after the processing of sewage-treatment plant 21 of the dust-laden sewage through spraying 13 bottom of caustic scrubber
Ring utilizes.
In the present embodiment, top spray equipment 32 can be removed water containing multiple to the nozzle of 33 injection water of demister
Device 31 is filler de-watering apparatus, and de-watering apparatus 31 is located at the top of spray caustic scrubber 13.Silk screen foam removal can be selected in demister 33
Device (or the other types such as deflector-type separator high-efficiency foam remover), demister 33 is arranged in the upper space of high-pressure atomization spray head 34.
The dust of smaller particle and the lye of spray pattern form mist, and the coal gas with mist rises through demister with certain speed
33, demister 33 completes the processing to dust particles smaller in coal gas, obtains aqueous purified gas.Top is set above demister 33
Spray equipment 32 is periodically sprayed demister 33 by top spray equipment 32 with high pressure water, avoids demister 33
It is blocked after long-time service.Fogged lye and demister 33 of the acid dust-laden blast furnace gas by the ejection of high-pressure atomization spray head 34
Effect, the available biggish coal gas of water content.
In the present embodiment, the top for spraying caustic scrubber 13 is set there are two gas vent, and described two gas vents are distinguished
For moisture-laden gas outlet and emission coal gas outlet, emission coal gas outlet is externally connected with scrubbing tower diffusion valve 12, the moisture-laden gas
Outlet is outer to be connected with spray caustic scrubber shut-off valve 14, dehydrater 15, check-valves 16 and clean coal gas pipe network 17 in turn, as shown in Figure 1.
(the filler water removal of de-watering apparatus 31 is arranged close at spray 13 top exit of caustic scrubber for the top of top spray equipment 32
Device).The inner stuffing of filler de-watering apparatus can be selected aluminum alloy material filler for flower ring (stainless steel filler for flower ring or other
Type filler).When moisture-laden gas passes through de-watering apparatus 31, the small water droplet in coal gas pools big water droplet simultaneously under the action of filler
Preliminary water removal is realized under the effect of gravity.
Baffle-type dehydrater (or the other types efficient water-removing such as cyclone type dehydrater device) can be selected in dehydrater 15.Tentatively remove
Moisture-laden gas after water exports discharge from the moisture-laden gas at 13 top of spray caustic scrubber, sets into spray 13 top outer of caustic scrubber
The dehydrater 15 set, that completes moisture-laden gas removes water process, finally obtains the qualified coal gas for meeting user's requirement, stops through purified gas
It returns valve 16 and enters clean coal gas pipe network 17 for users to use.
The top exit for spraying caustic scrubber 13 is equipped with scrubbing tower diffusion valve 12, which has cut-off simultaneously
The effect of valve and safety valve: when spray 13 internal pressure of caustic scrubber is normal, scrubbing tower diffusion valve 12 is in close state；Pressure is super
Out when setting value, scrubbing tower diffusion valve 12 automatically opens reduction internal pressure.
Under the normal production status of blast furnace, the big emission coal gas shut-off valve 19 and spray caustic scrubber of big emission coal gas pipeline are closed
The spray caustic scrubber diffusion valve 12 of top exit opens the stock gas shut-off valve 20 of stock gas pipeline and presses gas piping
Recovery valve 11, the spray caustic scrubber shut-off valve 14 and purified gas for opening spray caustic scrubber top exit enter the check-valves before pipe network
16。
Enter after 1 charging schedule of blast furnace roof feed pot in shaft furnace charging system, pressure coal gas feeds from blast furnace roof
Tank 1 is discharged into cyclone dust collectors 4 and carries out rough dedusting, and the coal gas after rough dedusting, which enters, presses coal-gas recovering pipeline.Press coal gas
Thermometer 8, flowmeter 9, the pressure gauge 10 of gas temperature, flow and pressure, detected value are pressed in installation measurement on recovery channel
It is timely fed back to blast furnace central control system, optimization blast furnace operating promotes smooth operation of furnace.
Pressure coal gas finally leads to the spray caustic scrubber 13 with deacidification, dedusting function by pressure coal gas recovery valve 11；
Stock gas enters spray caustic scrubber 13 through stock gas shut-off valve 20.According to process requirements, pressure coal gas can be opened respectively
Recovery valve 11 or stock gas shut-off valve 20 handle stock gas respectively and press coal gas；Pressure coal gas can also be opened simultaneously
Recovery valve 11 or stock gas shut-off valve 20, while handling stock gas and pressing coal gas.
In the present embodiment, spray caustic scrubber 13 also contains stock gas entrance, which is located at spray alkali cleaning
The lower part of tower 13 is washed, the stock gas entrance of spray caustic scrubber 13 is externally connected with stock gas recovery channel, which returns
Closed tube road is equipped with stock gas shut-off valve 20.The outlet of cyclone dust collectors 4 is connected with muffler 6 in parallel and primary pressure system
System 22, the gas pipeline is connected with concatenated nitrogen gas tank 3 and secondary balanced pressure system 23, as shown in Figure 1.
In the present embodiment, the diameter of caustic scrubber 13 and the mean flow rate highly according to blast furnace gas in tower are sprayed come really
It is fixed.Gas pressure, flow velocity and the stream that blast furnace gas Integrated Processing Unit proposed by the present invention passes through detection blast furnace gas inlet
Amount automatically adjusts the amount of water sprayed of high-pressure atomization spray head 34, improves the acid dust-laden coal gas in 13 inside of spray caustic scrubber and fogged lye
Neutralization reaction and dust removing effects.
The efficiency of dust collection of spray caustic scrubber 13 of the present invention is higher, can remove the dust that partial size is 0.1-20 microns, place
Dust content of gas after reason is less than 5mg/m3.Aqueous purified gas mechanical water after filler de-watering apparatus 31 and dehydrater 15 are handled contains
Amount is less than 7g/m3.Through the blast furnace gas integrated treatment reclaimer proposed by the present invention treated stock gas and press
Coal gas meets recycling and requires.
Heretofore described gas grid 35, demister 33, top spray equipment 32 and de-watering apparatus 31 can be adopted
With existing commercial product.Thus, spray caustic scrubber 13 proposed by the present invention is with simple, cheap, maintenance cost is low, movable
The advantages that component is few, is not susceptible to failure, and operating rate is high, it is possible to reduce the circulation of energy-saving and emission-reduction and resource is realized in air pollution
It utilizes.
The course of work of blast furnace gas integrated treatment reclaimer of the present invention is described below.
Enter after batch can charging schedule in shaft furnace charging system, opens and press coal gas recovery valve 11 and clean coal gas pipe network
Check-valves 16, pressure coal gas from blast furnace roof feed pot 1 discharge after enter cyclone dust collectors 4 carry out rough dedusting, after rough dedusting
Coal gas enter it is described press coal-gas recovering pipeline.Press coal-gas recovering pipeline on installation measurement press gas temperature, flow and
Thermometer 8, flowmeter 9, the pressure gauge 10 of pressure, detected value are timely fed back to blast furnace central control system, and optimization blast furnace operating promotees
Into smooth operation of furnace.
Pressure coal gas finally leads to the spray caustic scrubber with deacidification, dedusting function after pressing coal gas recovery valve 11
13；Stock gas enters spray caustic scrubber 13 through stock gas shut-off valve 20.According to process requirements, pressure coal can be opened respectively
Gas recovery valve 11 or stock gas shut-off valve 20 handle stock gas respectively and press coal gas；Pressure coal can also be opened simultaneously
Gas recovery valve 11 or stock gas shut-off valve 20, while handling stock gas and pressing coal gas.
It is closed when blast furnace staying and presses coal gas recovery valve 11 and stock gas shut-off valve 20, close 13 top of spray caustic scrubber
The scrubbing tower shut-off valve 14 and purified gas of outlet enter the check-valves 16 before pipe network, open the big release coal of big emission coal gas pipeline
The scrubbing tower diffusion valve 12 of gas shut-off valve 19 and spray caustic scrubber top exit.
Big emission coal gas eliminates acid medium and dust, meets emission request, pass through by the processing of spray caustic scrubber 13
Scrubbing tower diffusion valve 12 is discharged into air.
The present invention can be realized the integrated treatment to three kinds of blast furnace gases using spray caustic scrubber 13: in blast fumance,
Both be able to achieve to stock gas spray alkali deacidification processing, eliminate its corrosivity, can also complete press coal gas cleaning dust and
Recycle function；In blast furnace staying, the dedusting deacidification processing to big emission coal gas can be completed, is discharged into after meeting emission request
In air.
Blast furnace gas integrated treatment reclaimer of the present invention can reduce air pollution, realize energy-saving and emission-reduction and resource
Recycle.
The above, only specific embodiments of the present invention cannot limit the range that invention is implemented with it, so it is equivalent
The displacement of component, or according to equivalent variations made by the invention patent protection scope and modification, should all still fall within what this patent was covered
Scope.In addition, between technical characteristic and technical characteristic in the present invention, between technical characteristic and technological invention, technological invention with
Use can be freely combined between technological invention.
Claims (9)
1. a kind of blast furnace gas integrated treatment reclaimer, which is characterized in that the blast furnace gas integrated treatment reclaimer packet
Include blast furnace roof feed pot (1), cyclone dust collectors (4), spray caustic scrubber (13) and dehydrater (15), blast furnace roof feed pot
(1) pressure gas exit is connect by gas pipeline with the entrance of cyclone dust collectors (4), and cyclone dust collectors (4) go out
Mouth is connect by pressure coal-gas recovering pipeline and the pressure gas entry of spray caustic scrubber (13), blast furnace roof feed pot (1)
Emission coal gas outlet is connect by emission coal gas recovery channel with the emission coal gas entrance for spraying caustic scrubber (13), and caustic scrubber is sprayed
(13) moisture-laden gas outlet is connect by gas conveying tube line with the entrance of dehydrater (15).
2. blast furnace gas integrated treatment reclaimer according to claim 1, which is characterized in that in spray caustic scrubber (13)
Containing set gradually from bottom to top air-flow uniform device, lye spray equipment, demister (33), top spray equipment (32) and
De-watering apparatus (31), along the vertical direction, the air-flow uniform device contain at least one layer of gas grid (35), the lye spray
Device contains at least one lye spraying layer (36).
3. blast furnace gas integrated treatment reclaimer according to claim 2, which is characterized in that spraying caustic scrubber (13) is
Upright tubular structure, a lye spraying layer (36) contain more of the circumferential uniform intervals arrangement along spray caustic scrubber (13)
The radial direction of long spray gun (37) and short spray gun (38), every root long spray gun (37) and short spray gun (38) along spray caustic scrubber (13) is set
It sets, is equipped with high-pressure atomization spray head (34) on every root long spray gun (37) and short spray gun (38).
4. blast furnace gas integrated treatment reclaimer according to claim 3, which is characterized in that the lye spray equipment
Height containing multiple lye spraying layers (36), in two adjacent lye spraying layers (36), in a lye spraying layer (36)
Press the injection direction of atomizer (34) whole upward, the spray of the high-pressure atomization spray head (34) in another lye spraying layer (36)
It is whole downward to penetrate direction.
5. blast furnace gas integrated treatment reclaimer according to claim 4, which is characterized in that the lye spray equipment
Containing there are four lye spraying layer (36), which is followed successively by the first lye according to order from bottom to top and sprays
Drenching layer, the second lye spraying layer, third lye spraying layer and the 4th lye spraying layer.
6. blast furnace gas integrated treatment reclaimer according to claim 5, which is characterized in that the first lye spray
The injection direction of high-pressure atomization spray head (34) in layer is whole upward, the high-pressure atomization spray head in the second lye spraying layer
(34) injection direction is whole downward, the injection direction whole court of the high-pressure atomization spray head (34) in the third lye spraying layer
On, the injection direction of the high-pressure atomization spray head (34) in the first lye spraying layer is whole downward.
7. blast furnace gas integrated treatment reclaimer according to claim 2, which is characterized in that top spray equipment (32)
Containing it is multiple can be to the nozzle of demister (33) injection water, de-watering apparatus (31) is filler de-watering apparatus, de-watering apparatus
(31) it is located at the top of spray caustic scrubber (13), spray caustic scrubber (13) is also exported containing emission coal gas, and the emission coal gas goes out
Mouth and moisture-laden gas outlet are respectively positioned on the top of spray caustic scrubber (13), and the emission coal gas outlet is externally connected with scrubbing tower and diffuses
Valve (12).
8. blast furnace gas integrated treatment reclaimer according to claim 1, which is characterized in that spray caustic scrubber (13)
Bottom is equipped with sewage draining exit, and the lower section outside the sewage draining exit is equipped with sewage-treatment plant (21), and spray caustic scrubber (13) also contains furnace roof
The stock gas entrance of gas entry, spray caustic scrubber (13) is externally connected with stock gas recovery channel, stock gas recycling
Pipeline is equipped with stock gas shut-off valve (21).
9. blast furnace gas integrated treatment reclaimer according to claim 1, which is characterized in that described to press coal-gas recovering
It is provided with thermometer (8), flowmeter (9), pressure gauge (10) on pipeline and presses coal gas recovery valve (11), cyclone dust collectors (4)
Outlet be connected in parallel muffler (6) and a balanced pressure system (22), the gas pipeline and be connected with concatenated nitrogen
The outlet of gas tank (3) and secondary balanced pressure system (23), dehydrater 15 is connect with clean coal gas pipe network (17).
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| CN113731082A (en) * | 2020-05-28 | 2021-12-03 | 石河子天域新实化工有限公司 | Cyclone separation spray dust removal process method |
| CN115029163A (en) * | 2022-06-14 | 2022-09-09 | 中琉科技有限公司 | Blast furnace gas sulfur recovery device and system |
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