CN109136438A - A kind of blast furnace gas integrated treatment recovery method - Google Patents

A kind of blast furnace gas integrated treatment recovery method Download PDF

Info

Publication number
CN109136438A
CN109136438A CN201811275494.9A CN201811275494A CN109136438A CN 109136438 A CN109136438 A CN 109136438A CN 201811275494 A CN201811275494 A CN 201811275494A CN 109136438 A CN109136438 A CN 109136438A
Authority
CN
China
Prior art keywords
gas
spray
blast furnace
lye
caustic scrubber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811275494.9A
Other languages
Chinese (zh)
Inventor
苗胜田
王得刚
罗思红
段国建
陈秀娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MCC Capital Engineering and Research Incorporation Ltd
Zhongye Jingcheng Engineering Technology Co Ltd
Original Assignee
Zhongye Jingcheng Engineering Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhongye Jingcheng Engineering Technology Co Ltd filed Critical Zhongye Jingcheng Engineering Technology Co Ltd
Priority to CN201811275494.9A priority Critical patent/CN109136438A/en
Publication of CN109136438A publication Critical patent/CN109136438A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/22Dust arresters
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B5/00Making pig-iron in the blast furnace
    • C21B5/06Making pig-iron in the blast furnace using top gas in the blast furnace process
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/002Evacuating and treating of exhaust gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention discloses a kind of blast furnace gas integrated treatment recovery methods, the following steps are included: the big emission coal gas that step 1, blast furnace generate enters spray caustic scrubber (13) by emission coal gas recovery channel, the pressure coal gas that blast furnace generates enters spray caustic scrubber (13) by pressure coal-gas recovering pipeline, the stock gas that blast furnace generates enters spray caustic scrubber (13) by stock gas recovery channel, which presses coal gas and stock gas to form mixed gas in spray caustic scrubber (13);Step 2 keeps the air-flow of the mixed gas uniform;Step 3 sprays lye to the mixed gas;Step 4 removes mist in the mixed gas;Step 5 removes steam in the mixed gas.The blast furnace gas integrated treatment recovery method 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

A kind of blast furnace gas integrated treatment recovery method
Technical field
The present invention relates to steel smelting equipment field, a kind of particularly blast furnace gas integrated treatment recovery method.
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 sides There is cleaning dust, spray alkali to remove acid function, be both able to achieve for method, the spray caustic scrubber in the blast furnace gas integrated treatment recovery method The spray alkali deacidification processing of stock gas, the cleaning dust processing and recycling for pressing coal gas, are also able to achieve and remove to big emission coal gas Dirt deacidification processing.Purified gas is recovered to after dedusting, deacidification processing the coal gas that recycling requires is met using spray caustic scrubber Pipe network does not meet the coal gas that recycling requires and diffuses after dedusting, deacidification processing to air, reduces air pollution, realize energy conservation Emission reduction.
The present invention solves technological invention used by its technical problem:
A kind of blast furnace gas integrated treatment recovery method, comprising the following steps:
The big emission coal gas that step 1, blast furnace generate enters spray caustic scrubber by emission coal gas recovery channel, and blast furnace generates Pressure coal gas enter spray caustic scrubber by pressure coal-gas recovering pipeline, the stock gas that blast furnace generates is returned by stock gas Closed tube road enters spray caustic scrubber, which presses coal gas and stock gas to form gaseous mixture in spray caustic scrubber Body;
Step 2 keeps the air-flow of the mixed gas uniform;
Step 3 sprays lye to the mixed gas;
Step 4 removes mist in the mixed gas;
Step 5 removes steam in the mixed gas.
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, pressure coal gas detects pressure, temperature and the flow of pressure coal gas and timely feedbacks before entering spray caustic scrubber
To blast furnace central control system, blast furnace operating can be optimized, 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 schematic illustration of blast furnace gas integrated treatment recovery method of the present invention.
Fig. 2 is the structural schematic diagram of blast furnace gas integrated treatment reclaimer of the present invention.
Fig. 3 is the structural schematic diagram of spray caustic scrubber of the present invention.
Fig. 4 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 recovery method, comprising the following steps:
The big emission coal gas that step 1, blast furnace generate enters spray caustic scrubber 13 by emission coal gas recovery channel, and blast furnace produces Raw pressure coal gas enters spray caustic scrubber 13 by pressure coal-gas recovering pipeline, and the stock gas that blast furnace generates passes through furnace roof coal Gas recovery channel enters spray caustic scrubber 13, which presses coal gas and the stock gas shape in spray caustic scrubber 13 At mixed gas;
Step 2 keeps the air-flow of the mixed gas uniform;
Step 3 sprays lye to the mixed gas;
Step 4 removes mist in the mixed gas;
Step 5 removes steam in the mixed gas, as shown in Figure 1.
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 3.
Specifically, in step 2, the air-flow of the mixed gas is made using the air-flow uniform device in spray caustic scrubber 13 Uniformly;In step 3, lye is sprayed to the mixed gas using the lye spray equipment in spray caustic scrubber 13;In step 4 In, the mist in the mixed gas is removed using the demister 33 in spray caustic scrubber 13;In steps of 5, using spray neutralizing treatment De-watering apparatus 31 in tower 13 removes the steam in the mixed gas.
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 4.
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 recovery method 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 mixed gas, obtains aqueous purified gas.It is arranged above demister 33 Top spray equipment 32 is periodically sprayed demister 33 by top spray equipment 32 with high pressure water, avoids foam removal Device 33 is blocked after being used for a long time.Acid dust-laden blast furnace gas passes through the fogged lye and demister that high-pressure atomization spray head 34 sprays 33 effect, the available biggish coal gas of water content, as shown in Figure 3.
Blast furnace gas integrated treatment recovery method of the present invention is realized on blast furnace gas integrated treatment reclaimer, is somebody's turn to do Blast furnace gas integrated treatment reclaimer includes 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, whirlwind The outlet of deduster 4 is connect by pressure coal-gas recovering pipeline with the pressure gas entry for spraying caustic scrubber 13, and blast furnace roof adds The emission coal gas outlet of batch can 1 is connect by emission coal gas recovery channel with the emission coal gas entrance for spraying caustic scrubber 13, and alkali is sprayed The moisture-laden gas outlet of scrubbing tower 13 is connect by gas conveying tube line with the entrance of dehydrater 15, as shown in Figure 2.
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 2.
(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 coal-gas recovering Valve 11, the spray caustic scrubber shut-off valve 14 and purified gas for opening spray caustic scrubber top exit enter the check-valves 16 before pipe network.
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 recovery method 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 operational detail of blast furnace gas integrated treatment recovery method 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 spray caustic scrubber shut-off valve 14 and purified gas of outlet enter the check-valves 16 before pipe network, open putting greatly for big emission coal gas pipeline The scrubbing tower diffusion valve 12 of scattered coal 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 recovery method 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 (10)

1. a kind of blast furnace gas integrated treatment recovery method, which is characterized in that the blast furnace gas integrated treatment recovery method packet Include following steps:
The big emission coal gas that step 1, blast furnace generate enters spray caustic scrubber (13) by emission coal gas recovery channel, and blast furnace generates Pressure coal gas by pressure coal-gas recovering pipeline enter spray caustic scrubber (13), blast furnace generate stock gas pass through furnace roof coal Gas recovery channel enters spray caustic scrubber (13), which presses coal gas and stock gas in spray caustic scrubber (13) Middle formation mixed gas;
Step 2 keeps the air-flow of the mixed gas uniform;
Step 3 sprays lye to the mixed gas;
Step 4 removes mist in the mixed gas;
Step 5 removes steam in the mixed gas.
2. blast furnace gas integrated treatment recovery method 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 recovery method according to claim 2, which is characterized in that in step 2, using this Air-flow uniform device keeps the air-flow of the mixed gas uniform;In step 3, the mixed gas is sprayed using the lye spray equipment Spill lye;In step 4, the mist in the mixed gas is removed using demister (33);In steps of 5, using de-watering apparatus (31) steam in the mixed gas is removed.
4. blast furnace gas integrated treatment recovery method 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).
5. blast furnace gas integrated treatment recovery method according to claim 4, 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.
6. blast furnace gas integrated treatment recovery method according to claim 5, 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.
7. blast furnace gas integrated treatment recovery method according to claim 6, 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.
8. blast furnace gas integrated treatment recovery method 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).
9. blast furnace gas integrated treatment recovery method 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), sets on the stock gas recovery channel Have stock gas shut-off valve (20), described press on coal-gas recovering pipeline is provided with thermometer (8), flowmeter (9), pressure gauge (10) and coal gas recovery valve (11) are pressed.
10. blast furnace gas integrated treatment recovery method according to claim 1, which is characterized in that spray caustic scrubber (13) Outlet outside be also connected with spray caustic scrubber shut-off valve (14) and dehydrater (15) in turn.
CN201811275494.9A 2018-10-30 2018-10-30 A kind of blast furnace gas integrated treatment recovery method Pending CN109136438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811275494.9A CN109136438A (en) 2018-10-30 2018-10-30 A kind of blast furnace gas integrated treatment recovery method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811275494.9A CN109136438A (en) 2018-10-30 2018-10-30 A kind of blast furnace gas integrated treatment recovery method

Publications (1)

Publication Number Publication Date
CN109136438A true CN109136438A (en) 2019-01-04

Family

ID=64806569

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811275494.9A Pending CN109136438A (en) 2018-10-30 2018-10-30 A kind of blast furnace gas integrated treatment recovery method

Country Status (1)

Country Link
CN (1) CN109136438A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109706281A (en) * 2019-02-26 2019-05-03 武汉钢铁有限公司 Blast furnace process equipment, its batch can press coal gas drainage arrangement and water discharge method
CN111961775A (en) * 2020-09-03 2020-11-20 山西太钢不锈钢股份有限公司 Method for reducing dust deposition of dry-process raw gas main pipeline
CN112853016A (en) * 2021-01-06 2021-05-28 鞍钢股份有限公司 Blast furnace gas treatment system and method suitable for CCPP operation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101928608A (en) * 2010-08-26 2010-12-29 北京首钢国际工程技术有限公司 Blast-furnace gas hydrogen chloride purifying and absorbing compound device and method
CN203569127U (en) * 2013-12-02 2014-04-30 北京京诚泽宇能源环保工程技术有限公司 Blast furnace gas alkali spraying and dechlorination device
CN106191353A (en) * 2016-08-29 2016-12-07 北京首钢国际工程技术有限公司 A kind of blast furnace top pressure-equalizing bleeding gas recovering device and using method thereof
CN208003708U (en) * 2018-01-18 2018-10-26 新兴凌云医药化工有限公司 Gas foam removal dispersal device in a kind of scrubbing tower

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101928608A (en) * 2010-08-26 2010-12-29 北京首钢国际工程技术有限公司 Blast-furnace gas hydrogen chloride purifying and absorbing compound device and method
CN203569127U (en) * 2013-12-02 2014-04-30 北京京诚泽宇能源环保工程技术有限公司 Blast furnace gas alkali spraying and dechlorination device
CN106191353A (en) * 2016-08-29 2016-12-07 北京首钢国际工程技术有限公司 A kind of blast furnace top pressure-equalizing bleeding gas recovering device and using method thereof
CN208003708U (en) * 2018-01-18 2018-10-26 新兴凌云医药化工有限公司 Gas foam removal dispersal device in a kind of scrubbing tower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王丽萍等: "《大气污染控制工程》", 31 August 2012, 中国矿业大学出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109706281A (en) * 2019-02-26 2019-05-03 武汉钢铁有限公司 Blast furnace process equipment, its batch can press coal gas drainage arrangement and water discharge method
CN111961775A (en) * 2020-09-03 2020-11-20 山西太钢不锈钢股份有限公司 Method for reducing dust deposition of dry-process raw gas main pipeline
CN112853016A (en) * 2021-01-06 2021-05-28 鞍钢股份有限公司 Blast furnace gas treatment system and method suitable for CCPP operation

Similar Documents

Publication Publication Date Title
CN109136438A (en) A kind of blast furnace gas integrated treatment recovery method
CN110452744A (en) Blast furnace coal gas comprehensive management of environmental protection system and technique
CN102580437A (en) Converter primary flue gas dual-tower purification method and converter primary flue gas purification tower
CN108686490A (en) A kind of fuel gas desulfurization gas wash tower and desulfurization and dust-removal method
CN102690689B (en) Device and method for scrubbing and purifying coal gas
CN109234483A (en) A kind of blast furnace gas integrated treatment reclaimer
CN202289850U (en) Smoke burning disposal system for sludge
CN109135841A (en) A kind of spray caustic scrubber
CN202410469U (en) Dust collection system for dried adipic acid
CN106390662A (en) Combined buffer type smoke heat exchange purifying device
CN209098711U (en) A kind of blast furnace gas integrated treatment reclaimer
CN209161975U (en) A kind of spray caustic scrubber
CN209024566U (en) A kind of blast furnace roof presses coal-gas recovering equipment
CN201969484U (en) Trimeric sodium phosphate tail gas washing device
CN109136432A (en) A kind of blast furnace roof presses coal-gas recovering method
CN105176599B (en) A kind of percussion flow wash mill and purification technique for raw gas purifying
CN109112241A (en) A kind of blast furnace roof presses coal-gas recovering equipment
CN211487167U (en) Flue gas desulfurization dust collector
CN201046376Y (en) A flue gas dust collector
CN207042235U (en) A kind of flue-gas dust-removing and desulfurization device
CN105480980A (en) Method and device for treating residue slurry resulting from trichlorosilane production
CN108686492B (en) Flue gas dust removal desulfurization tower and dust removal desulfurization method
CN108686493B (en) Flue gas dust removal desulfurization tower and dust removal desulfurization process
CN202595069U (en) Coal gas scrubbing and purifying device
CN205435339U (en) Multilayer level dust fall waste gas scrubbing tower

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190104

RJ01 Rejection of invention patent application after publication