CN105087854A - Dry dedusting and process waste heat stair type recover device and method for high-temperature flue gas of converter - Google Patents
Dry dedusting and process waste heat stair type recover device and method for high-temperature flue gas of converter Download PDFInfo
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- CN105087854A CN105087854A CN201510530609.4A CN201510530609A CN105087854A CN 105087854 A CN105087854 A CN 105087854A CN 201510530609 A CN201510530609 A CN 201510530609A CN 105087854 A CN105087854 A CN 105087854A
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Abstract
The invention relates to a dry dedusting and process waste heat stair type recover device and method for high-temperature flue gas of a converter. The device comprises a steelmaking converter, a vertical flue above the steelmaking converter, a 90-degree tail end flue, a horizontally-arranged first steam-water heat exchanger, a spraying and cooling dust removal tower, a high-temperature dust remover, a horizontally-arranged second steam-water heat exchanger, a steam pocket and an oxygen removal device. One end of the first steam-water heat exchanger is communicated with the vertical flue through the 90-degree tail end flue. The top end of the spraying and cooling dust removal tower is communicated with the other end of the first steam-water heat exchanger through a 90-degree elbow. The bottom end of the spraying and cooling dust removal tower is communicated with the high-temperature dust remover. The purified gas outlet of the high-temperature dust remover is communicated with the second steam-water heat exchanger. The other end of the 90-degree tail end flue is connected with the horizontally-arranged first steam-water heat exchanger and the second steam-water heat exchanger communicated with the high-temperature dust remover. Multi-stage heat exchange and cooling can be achieved. The temperature lowering amplitude is large. The water consumption is low. The dust removal rate is high.
Description
Technical field
The present invention relates to a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery method and equipment, belong to steel-making flue gas waste heat recovery process field.
Background technology
Steel-making flue gas processing method traditional at present has OG method and LT method.The flow process of OG method is that converter gas is after overskirt, I to IV section of gasification cooling flue cooling, about 800 DEG C are down to by 1600 DEG C, then a literary composition, the cooling also dedusting further of two literary compositions is entered, centrifugal blower is drawn to three-way switch valve again through luring, qualified coal gas sends into gas recovery cabinet, does not reach the flue gas reclaiming requirement and enters diffusing tower igniting discharge.There is following defect in it:
1), the dedusting water yield of a literary composition, two literary composition needs is very large; 2), steam and wet dust be bonded to Vanes on Induced Draft Fan, and cause rotor unbalance, cause blower fan to shake and damage, failure rate is high, and influential system normal table runs; 3), the easy fouling of system, cause dust collection capacity to decline, dust collecting effect and decontamination effect improving are deteriorated, and fire door flue dust is excessive, diffusing tower emits tobacco; 4), systemic resistance is large, and power consumption is high; 5), sewage, sludge treating process be complicated, and floor space is large, and easily causes secondary pollution; 6) affect by Venturi meter efficiency, smoke dust discharge concentration higher (for 50-100mg/Nm3).
The representational flow process being evaporative cooler and adding electrostatic precipitator of LT dry method dust most, Thyssen Aktiengesellschaft strange by West Germany Shandong combines release, is called for short LT method.Technical process is: flue gas enters after gasification cooling flue cools indirectly, more directly carry out with evaporative cooler cooling-spray into atomized water to by the flue gas in evaporative cooler.The water yield sprayed into, will determine with the heat content producing hot gas flow in steelmaking process exactly, after flue gas being cooled to 150 DEG C one 200 DEG C, introducing electrostatic precipitator carry out smart dedusting via gas line.Then by air inducing equipment--axial blower enters coal gas switching station, and qualified coal gas enters recovery system after cooling further, and underproof coal gas is through diffusing tower ignition bleeding.The shortcoming of this dry method dust.1) high, the automatic control of dry method dust cost is chain many, requires that level of automation is high; 2) mechanical means adopted is many, complex structure, and failure rate is high, and servicing time is long; 3) because transpiration cooling makes to contain higher moisture in coal gas, easily form condensation, affect pole distance and running voltage, affect ash-transmission system equipment operation life simultaneously, for this has strict demand to the wet cooling tower water yield, hydraulic pressure control; 4) on transpiration cooling wall, scale problems does not also well solve; 5) require high to converter operation, fly-ash separator, can sacrifice steel-making rhythm, otherwise explosive, although there is explosion venting device, still can affect life-span and the dust removing effects of component in electric precipitator; 6) after dedusting, gas temperature is high, just can enter gas chamber after special cooling apparatus also must be adopted to cool, herein water consumption and wet dedusting periodical feeding amount close.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system and method, overcomes the defect of above-mentioned OG method and LT method technology and equipment.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system, the one end of the 90 degree of end flues comprising vertical flue above steel-making converter, steel-making converter and be connected with vertical connecting flue topmost, also comprise the first steam water heat exchanger that level installs, the second steam water heat exchanger that spray cooling gas wash tower, hot precipitator, level are installed, drum and deoxygenator
One end of described first steam water heat exchanger is communicated with the other end of described 90 degree of end flues; Described spray cooling gas wash tower is vertically arranged and its top is communicated with by the other end of 90 degree of elbows with described first steam water heat exchanger; The bottom of described spray cooling gas wash tower is fixedly connected with the top of described hot precipitator and is communicated with; Described hot precipitator upper end is provided with neat stress outlet, and lower end is provided with ash output hole; One end of second steam water heat exchanger and described neat stress outlet, the other end is communicated with converter gas recycling pipeline; Described drum is communicated with described first steam water heat exchanger by water circulating pipe; Described deoxygenator is communicated with described second steam water heat exchanger by water circulating pipe and is communicated with; Described 90 degree of end flues and/or 90 degree of elbows prevent explosion venting device.
The invention has the beneficial effects as follows: the second steam water heat exchanger that the present invention is communicated with due to the first steam water heat exchanger and hot precipitator connecting level installation at 90 degree of end flue the other ends, multi-stage heat exchanger cooling can be realized, temperature drop is large, and water loss is few, and dust removal efficiency is high.
On the basis of technique scheme, the present invention can also do following improvement.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, described first steam water heat exchanger and the second steam water heat exchanger are the hollow cylindrical structure that close arranging pipe is made, the port at close arranging pipe two ends is all fixedly connected with perpendicular box pipe and is communicated with, perpendicular box pipe is provided with Media Interface Connector, and described Media Interface Connector is communicated with described drum or deoxygenator by water circulating pipe.
Above-mentioned further beneficial effect is adopted to be: the hollow cylindrical structure made by close arranging pipe due to the first steam water heat exchanger and the second steam water heat exchanger, flue gas is when by hollow cylindrical structure, heat-eliminating medium is passed into as water in close arranging pipe, realize the cooling to flue gas, and the port at close arranging pipe two ends is all fixedly connected with perpendicular box pipe, perpendicular box pipe can be fixedly connected with by flange and other pipeline or the perpendicular box pipe be connected with pipeline, installs to change convenient and heat exchanger effectiveness is high.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, the many steel tubing in different shapess that described first steam water heat exchanger and the second steam water heat exchanger also comprise interior pipe or arrange along hollow cylindrical structure radial direction, described interior pipe box is located in described hollow cylindrical structure, is connected and fixed between described interior pipe and described hollow cylindrical structure by web member; Described interior pipe is the hollow cylinder pipeline that close arranging pipe is made, and the port at close arranging pipe two ends is all fixedly connected with perpendicular box pipe; The two ends of described steel tubing in different shapes are communicated with the close arranging pipe in described hollow cylindrical structure or are communicated with the perpendicular box pipe arranged along hollow cylindrical structure axial direction due.
Adopt above-mentioned further beneficial effect: due to be arranged with in hollow cylindrical structure close arranging pipe make in pipe, flue gas can by between interior pipe and hollow cylindrical structure, or in hollow cylindrical structure, be provided with the many steel tubing in different shapess arranged along hollow cylindrical structure radial direction, when flue gas is by hollow cylindrical structure, heat exchange efficiency can be improved further.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, described hollow cylindrical structure or hollow cylinder pipeline are turned round by the close arranging pipe of screw arrangement and are turned to.
Described spray cooling gas wash tower comprises gas wash tower housing and tower top connecting leg section, described gas wash tower housing is made up of vertical close arranging pipe, the two ends of described vertical close arranging pipe are provided with Media Interface Connector by perpendicular box pipe and perpendicular box pipe and are communicated with deoxygenator, and described tower top connecting leg section lower end is fixedly connected with by the perpendicular box pipe of gas wash tower case top; Smoke distributor and loop expansion pipe is provided with in described tower top connecting leg section; Two medium spray gun is provided with in 90 degree of elbows that described tower top connecting leg section upper end connects.
Above-mentioned further beneficial effect is adopted to be: to turn to because the first steam water heat exchanger and the second steam water heat exchanger are turned round by the close arranging pipe of screw arrangement, dust attachment can be reduced, extend cleaning or replacing construction, improve heat exchanger effectiveness; Adopt vertical close arranging pipe to make gas wash tower housing, heat exchange can be realized further realizing water-cooled while, further improve heat exchanger effectiveness.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, described hot precipitator comprises dust chamber, the first filter chamber, the second filter chamber and neat stress room, and described dust chamber upper end is fixedly connected with the bottom of described spray cooling gas wash tower, the first filter chamber and the second filter chamber and is communicated with; Described neat stress room to be positioned at above described second filter chamber and to fix with it and be communicated with, and its top is provided with neat stress air outlet, and described neat stress air outlet is fixedly connected with one end of described second steam water heat exchanger and is communicated with.The horizontal positioned that described first filter chamber can be made up of horizontally disposed close arranging pipe columnar structured, the housing of described second filter chamber can be made up columnar structured of close arranging pipe that vertically arranging.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, the bottom of described dust chamber is provided with high temperature resistant strip cinder conveyer, and described high temperature resistant strip cinder conveyer connects ash-storing bin by ash output hole and pipeline.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, described dust chamber vertical section is inverted trapezoidal; Described first filter chamber is interior and the direction vertical with air-flow is provided with plural stainless steel woods lattice filter plate; Vertically be furnished with many pyroceramic membrane filtration pipes in described second filter chamber, the air outlet of described pyroceramic membrane filtration pipe is positioned at described neat stress indoor.
The above-mentioned stainless steel woods lattice filter plate of the present invention can be connected with the vibration dust-cleaning drive unit be arranged on outside the first filter chamber, can dust on the cleaning stainless steel woods lattice filter plate of timing.
The above-mentioned many pyroceramic membrane filtration pipes of the present invention can also connect and be communicated with anti-blowpipe, anti-blowpipe is arranged on outside described second filter chamber, anti-blowpipe can blow from the air outlet input air of pyroceramic membrane filtration pipe the dust be attached to pyroceramic membrane filtration pipe off, improves smoke filtration efficiency.This hot precipitator structure, owing to being provided with stainless steel woods lattice filter plate, many pyroceramic membrane filtration pipes and vibration dust-cleaning drive unit and anti-blowpipe effectively can prevent scaling, affects flow of flue gas speed, increases the stability of plant running.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, described second filter chamber is two or more, and it is all communicated with described neat stress room by pyroceramic membrane filtration pipe.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, the housing of described hot precipitator is made up of close arranging pipe, and the port of close arranging pipe is communicated with described deoxygenator by perpendicular box pipe and the circulation line that is connected with perpendicular box pipe.
The present invention's a kind of converter high-temperature flue gas dry method dust described above and process waste heat staged recovery system, further, also comprise gas cooler, described gas cooler is communicated with converter gas recycling pipeline, single medium spray gun is provided with in it, bottom connects water lute drainer, and top connects gas fan by pipeline.
Adopt a kind of above-mentioned converter high-temperature flue gas dry method dust of the present invention and process waste heat staged equipment, water consumption per hour is only 40 to 80 tons, and all absorbed by high-temperature flue gas, integrate ash silo interior as dry ash, decrease the cost of original muddy water circular treatment facility and running maintenance; Rotor in gas fan also significantly improves online duration of service.
The present invention also provides the recovery method of a kind of above-mentioned converter high-temperature flue gas dry method dust and process waste heat staged equipment, comprise the following steps: step (1), steel-making converter produces a large amount of coal gas and is mingled with the mixed flue gas of particulate in smelting process, the vertical flue of mixed gas above steel-making converter and 90 degree of end flues carry out one-level heat exchange cooling, recovered steam;
Step (2), carries out secondary heat exchange cooling by the first steam water heat exchanger, recovered steam from 90 degree of end flues flue gas out;
Step (3), the flue gas after step (2) heat exchange enters spray cooling gas wash tower and carries out three grades of cooling dedustings, the particulate dedusting of removing more than 40um;
Step (4) is after spray cooling gas wash tower, flue gas enters hot precipitator through the bottom of spray cooling gas wash tower, dust falls into the bottom of hot precipitator, and flue gas is entered after the second steam water heat exchanger carries out heat exchange by the neat stress obtained after the top dedusting of hot precipitator and enters converter gas recycling pipeline.
The close arranging pipe formation that the present invention is described above or the structure made, be all tightly connected between its close arranging pipe.
Accompanying drawing explanation
Fig. 1 is a kind of converter high-temperature flue gas dry method dust of the present invention and process waste heat staged recovery system structural representation;
Fig. 2 is the longitudinal profile schematic diagram of the hot precipitator in the present invention's a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system;
Fig. 3 is the horizontal section schematic diagram of the hot precipitator in the present invention's a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system;
Fig. 4 is the first steam water heat exchanger structural representation in a kind of converter high-temperature flue gas dry method dust of the present invention and process waste heat staged recovery system;
Fig. 5 is the structural representation of a kind of embodiment of the first steam water heat exchanger in a kind of converter of the present invention high-temperature flue gas dry method dust and process waste heat staged recovery system;
Fig. 6 is the structural representation of the another kind of embodiment of the first steam water heat exchanger in the present invention's a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system.
In accompanying drawing, the list of parts representated by each label is as follows:
1, steel-making converter, 2, vertical flue, 3, 90 degree of end flues, 4, first steam water heat exchanger, 5, spray cooling gas wash tower, 6, hot precipitator, 7, second steam water heat exchanger, 8, drum, 9, deoxygenator, 10, 90 degree of elbows, 11, converter gas recycling pipeline, 12, first water circulating pipe, 13, second water circulating pipe, 14, prevention explosion venting device, 15, close arranging pipe, 16, perpendicular box pipe, 17, Media Interface Connector, 18, flange, 19, interior pipe, 20, steel tubing in different shapes, 21, gas wash tower housing, 22, tower top connecting leg section, 23, smoke distributor, 24, loop expansion pipe, 25, two medium spray gun, 26, dust chamber, 27, first filter chamber, 28, second filter chamber, 29, neat stress room, 30, high temperature resistant strip cinder conveyer, 31, ash-storing bin, 32, unloading valve, 33, stainless steel woods lattice filter plate, 34, pyroceramic membrane filtration pipe, 35, vibration dust-cleaning drive unit, 36, anti-blowpipe, 37, gas cooler, 38, single medium spray gun, 39, water lute drainer, 40, gas fan, 41, neat stress air outlet.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system, the one end of the 90 degree of end flues 3 comprising vertical flue 2 above steel-making converter 1, steel-making converter and be connected with vertical connecting flue topmost, also comprise the first steam water heat exchanger 4 that level installs, the second steam water heat exchanger 7 that spray cooling gas wash tower 5, hot precipitator 6, level are installed, drum 8 and deoxygenator 9
One end of first steam water heat exchanger 4 is communicated with the other end of 90 degree of end flues 3; Spray cooling gas wash tower 5 is vertically arranged and its top is communicated with the other end of the first steam water heat exchanger 4 by 90 degree of elbows 10; The bottom of spray cooling gas wash tower 5 is fixedly connected with the top of hot precipitator 6 and is communicated with; Hot precipitator 6 upper end is provided with neat stress outlet, and lower end is provided with ash output hole; One end of second steam water heat exchanger 7 and neat stress outlet, the other end is communicated with converter gas recycling pipeline 11; Drum 8 is communicated with the first steam water heat exchanger 4 by the first water circulating pipe 12; Deoxygenator 9 is communicated with the second steam water heat exchanger 7 by the second water circulating pipe 13 and is communicated with; 90 degree of end flues 3 and/or 90 degree of elbows 10 prevent explosion venting device 14.
A kind of converter high-temperature flue gas dry method dust of the present invention and process waste heat staged recovery system, in certain embodiments, as shown in Figure 2, the first above-mentioned steam water heat exchanger 4 and the second steam water heat exchanger 7 are the hollow cylindrical structure that close arranging pipe 15 is made, the port at close arranging pipe 15 two ends is all fixedly connected with perpendicular box pipe 16, perpendicular box pipe 16 is provided with Media Interface Connector 17, Media Interface Connector 17 is communicated with drum 8 or deoxygenator 9 by circulating line, flue gas is when by hollow cylindrical structure, heat-eliminating medium is passed into as water in close arranging pipe 15, realize the cooling to flue gas, and the port at close arranging pipe 15 two ends is all fixedly connected with perpendicular box pipe 16, perpendicular box pipe can be fixedly connected with other pipeline or other the perpendicular box pipe be connected with pipeline by flange 18, installation changes convenient and heat exchanger effectiveness is high.
Specifically preferably, the first steam water heat exchanger 4 and the second steam water heat exchanger 5 also comprise pipe 19 in interior pipe 19 and are set in hollow cylindrical structure, are connected and fixed between interior pipe 19 and hollow cylindrical structure by web member; The hollow cylinder pipeline that interior pipe 19 is made for close arranging pipe, the port at close arranging pipe two ends is all fixedly connected with perpendicular box pipe and is communicated with.
In further embodiments, at the many steel tubing in different shapess 20 also arranged along hollow cylindrical structure radial direction, the two ends of steel tubing in different shapes 20 are communicated with the perpendicular box pipe 16 arranged along hollow cylindrical structure axial direction due, can improve heat exchange efficiency further.Preferably, the close arranging pipe screw arrangement of above-mentioned hollow cylindrical structure and interior pipe and turn round around formation, can reduce dust attachment, extend cleaning or replacing construction, improve heat exchanger effectiveness.
The present invention is a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system as above, in other specific embodiments, spray cooling gas wash tower 5 comprises gas wash tower housing 21 and tower top connecting leg section 22, gas wash tower housing 21 is made up of vertical close arranging pipe, the two ends of vertical close arranging pipe are provided with Media Interface Connector 17 by perpendicular box pipe 16 and perpendicular box pipe 16 and are communicated with deoxygenator 9, and tower top connecting leg section 22 lower end is fixedly connected with by the perpendicular box pipe 16 at gas wash tower housing 21 top; Smoke distributor 23 and loop expansion pipe 24 is provided with in tower top connecting leg section 22; Two medium spray gun 25 is provided with in 90 degree of elbows 10 that tower top connecting leg section 22 upper end connects.Heat exchange can be realized further the while that this structure can realizing water-cooled, improve heat exchanger effectiveness.
The present invention is a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system as above, in other specific embodiments, as shown in figures 1 and 3, hot precipitator 6 comprises dust chamber 26, first filter chamber 27, second filter chamber 28 and neat stress room 29, dust chamber 26 upper end be fixedly connected with side by side and be communicated with the bottom of spray cooling gas wash tower 5, first filter chamber 27 and the second filter chamber 28; Neat stress room 29 to be positioned at above the second filter chamber 28 and to be communicated with it, and its top is provided with neat stress air outlet 41, and neat stress air outlet 41 is fixedly connected with one end of the second steam water heat exchanger 7.
Concrete preferably the bottom of dust chamber 26 is provided with high temperature resistant strip cinder conveyer 30, and high temperature resistant strip cinder conveyer 30 connects ash-storing bin 31 by ash output hole and pipeline, this pipeline is provided with unloading valve 32.
More preferably, dust chamber 26 vertical section is inverted trapezoidal; First filter chamber 27 is interior and the direction vertical with air-flow is provided with plural stainless steel woods lattice filter plate 33; Vertically be furnished with many pyroceramic membrane filtration pipes 34 in second filter chamber 28, the air outlet of pyroceramic membrane filtration pipe 34 is positioned at neat stress room 29, and namely the second filter chamber 28 is communicated with by pyroceramic membrane filtration pipe 34 with neat stress room 29.
Stainless steel woods lattice filter plate 33, pyroceramic membrane filtration pipe 34 can be suspended in described first filter chamber 27 and the second filter chamber 28, flue gas is level run in the first filter chamber 27 and the second filter chamber 28, realize staged according to vector majorization and millipore filtration principle to filter, reach the emission concentration of various requirement, running resistance is little, leak out Shuai≤2%, efficiency of dust collection is high, and filter material self-cleaning property is good, long service life, entirety occupies little space, system job realizes automatically controlling, and close arranging pipe housing access low pressure recycle system, dedusting realizes energy recovery simultaneously.
More preferably, stainless steel woods lattice filter plate 33 can be connected and installed vibration dust-cleaning drive unit 35 outside hot precipitator 6 by web members such as connecting rods, realizes the dust on the cleaning stainless steel woods lattice filter plate 33 of timing; Many pyroceramic membrane filtration pipes 34 can also connect and be communicated with anti-blowpipe 36, anti-blowpipe 36 can blow from the air outlet input air of pyroceramic membrane filtration pipe the dust be attached to pyroceramic membrane filtration pipe 34 off, improve smoke filtration efficiency, effectively can prevent scaling, affect flow of flue gas speed, increase the stability of plant running.
In some concrete examples, described second filter chamber 28 is two or more, and it is all communicated with neat stress room 29 by pyroceramic membrane filtration pipe 34.
At some in other concrete examples, above-mentioned dust chamber 26, first filter chamber 27, second filter chamber 28 and the housing of neat stress room 29 are made up of close arranging pipe, and the two ends of close arranging pipe are communicated with deoxygenator 9 by perpendicular box pipe and circulation line.
The present invention is a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system as above, in other specific embodiments, also comprise gas cooler 37, gas cooler 37 is communicated with converter gas recycling pipeline 11, single medium spray gun 38 is provided with in it, bottom connects water lute drainer 39, and top connects gas fan 40 by pipeline.Gas fan
Adopt above-mentioned a kind of converter high-temperature flue gas dry method dust and a kind of specific embodiment of process waste heat staged recovery system: steel-making converter produces a large amount of high temperature in smelting process and contains a large amount of coal gas and be mingled with the mixed gas of particulate, temperature is at 1450 DEG C-1600 DEG C, enter vertical flue through fire door and carry out one-level heat exchange cooling, temperature is down to about 900 DEG C by 1600 DEG C, and reclaims more than 200 DEG C steam 100m
3/ t, flue gas enters the first steam water heat exchanger and carries out second stage heat exchange cooling, is down to about 600 DEG C by 900 DEG C, and reclaims more than 200 DEG C steam 30m
3/ t, flue gas enters spray cooling gas wash tower again, and carry out three grades of coolings, thick dedusting and heat exchange, temperature is down to about 300 DEG C by 600 DEG C, dust removal efficiency 40 to 50%, i.e. more than 40 μm particulate dedustings.Then the first filter chamber that flue gas enters hot precipitator through connecting leg carries out smart dedusting, i.e. more than 1 μm particulate dedusting.The second filter chamber that flue gas then enters hot precipitator carries out through dedusting again, guarantees that dust content reaches or lower than 10mg/m
3, the housing of above-mentioned spray cooling gas wash tower, woods lattice fly-ash separator, high temperature membrane fly-ash separator all can adopt tube-to-tube construction form, and access deoxygenator, heats the water in deoxygenator, and saving the steam consumption that thermophore is sent back to deoxygenator concurrent heating about has 6m
3/ h, flue gas is cooled to about 65 DEG C through converter gas recycling pipeline and gas cooler again, and by gas fan dynamic action, qualified coal gas sends into gas chamber, and defective coal gas is along bleeder burning and exhausting.The present invention removes high temperature more than 200 DEG C carbon containing (more than C50%) powder ashes through the two-stage filtration of spray cooling gas wash tower and hot precipitator, fall into ash silo, unloading valve can be controlled by level gage, powder ash is sent into bulk cement storage tank from refractory plate ribbon flight cinder conveyer, then gives pelletizing pelletizing or sintering spice through gas delivery system or tank car.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " axis ", " radial direction ", " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a converter high-temperature flue gas dry method dust and process waste heat staged recovery system, the one end of the 90 degree of end flues comprising vertical flue above steel-making converter, steel-making converter and be connected with vertical connecting flue topmost, it is characterized in that, also comprise the first steam water heat exchanger that level installs, the second steam water heat exchanger that spray cooling gas wash tower, hot precipitator, level are installed, drum and deoxygenator
One end of described first steam water heat exchanger is communicated with the other end of described 90 degree of end flues; Described spray cooling gas wash tower is vertically arranged and its top is communicated with by the other end of 90 degree of elbows with described first steam water heat exchanger; The bottom of described spray cooling gas wash tower is fixedly connected with the top of described hot precipitator and is communicated with; Described hot precipitator upper end is provided with neat stress outlet, and lower end is provided with ash output hole; One end of second steam water heat exchanger and described neat stress outlet, the other end is communicated with converter gas recycling pipeline; Described drum is communicated with described first steam water heat exchanger by water circulating pipe; Described deoxygenator is communicated with described second steam water heat exchanger by water circulating pipe and is communicated with; Described 90 degree of end flues and/or 90 degree of elbows prevent explosion venting device.
2. a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system according to claim 1, it is characterized in that, described first steam water heat exchanger and the second steam water heat exchanger are the hollow cylindrical structure that close arranging pipe is made, the port at close arranging pipe two ends is all fixedly connected with perpendicular box pipe and is communicated with, perpendicular box pipe is provided with Media Interface Connector, and described Media Interface Connector is communicated with described drum or deoxygenator by water circulating pipe.
3. a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system according to claim 2, it is characterized in that, the many steel tubing in different shapess that described first steam water heat exchanger and the second steam water heat exchanger also comprise interior pipe or arrange along hollow cylindrical structure radial direction, described interior pipe box is located in described hollow cylindrical structure, is connected and fixed between described interior pipe and described hollow cylindrical structure by web member; Described interior pipe is the hollow cylinder pipeline that close arranging pipe is made, and the port at close arranging pipe two ends is all fixedly connected with perpendicular box pipe; The two ends of described steel tubing in different shapes are communicated with the close arranging pipe in described hollow cylindrical structure or are communicated with the perpendicular box pipe arranged along hollow cylindrical structure axial direction due.
4. a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system according to claim 3, it is characterized in that, described hollow cylindrical structure or hollow cylinder pipeline are turned round by the close arranging pipe of screw arrangement and are turned to;
Described spray cooling gas wash tower comprises gas wash tower housing and tower top connecting leg section, described gas wash tower housing is made up of vertical close arranging pipe, the two ends of described vertical close arranging pipe are provided with Media Interface Connector by perpendicular box pipe and perpendicular box pipe and are communicated with deoxygenator, and described tower top connecting leg section lower end is fixedly connected with by the perpendicular box pipe of gas wash tower case top; Smoke distributor and loop expansion pipe is provided with in described tower top connecting leg section; Two medium spray gun is provided with in 90 degree of elbows that described tower top connecting leg section upper end connects.
5. according to claim 1 converter high-temperature flue gas dry method dust and process waste heat staged recovery system, it is characterized in that, described hot precipitator comprises dust chamber, the first filter chamber, the second filter chamber and neat stress room, and described dust chamber upper end is fixedly connected with the bottom of described spray cooling gas wash tower, the first filter chamber and the second filter chamber and is communicated with; Described neat stress room to be positioned at above described second filter chamber and to fix with it and be communicated with, and its top is provided with neat stress air outlet, and described neat stress air outlet is fixedly connected with one end of described second steam water heat exchanger and is communicated with.
6. according to claim 5 converter high-temperature flue gas dry method dust and process waste heat staged recovery system, it is characterized in that, the bottom of described dust chamber is provided with high temperature resistant strip cinder conveyer, and described high temperature resistant strip cinder conveyer connects ash-storing bin by ash output hole and pipeline.
7. according to claim 5 converter high-temperature flue gas dry method dust and process waste heat staged recovery system, it is characterized in that, described dust chamber vertical section is inverted trapezoidal; Described first filter chamber is interior and the direction vertical with air-flow is provided with plural stainless steel woods lattice filter plate; Vertically be furnished with many pyroceramic membrane filtration pipes in described second filter chamber, the air outlet of described pyroceramic membrane filtration pipe is positioned at described neat stress indoor.
8. according to claim 7 converter high-temperature flue gas dry method dust and process waste heat staged recovery system, it is characterized in that, described second filter chamber is two or more, and it is all communicated with described neat stress room by pyroceramic membrane filtration pipe; The housing of described hot precipitator is made up of close arranging pipe, and the port of close arranging pipe is communicated with described deoxygenator by perpendicular box pipe and the circulation line that is connected with perpendicular box pipe.
9. a kind of converter high-temperature flue gas dry method dust and process waste heat staged recovery system according to any one of claim 1 to 8, it is characterized in that, also comprise gas cooler, described gas cooler is communicated with converter gas recycling pipeline, single medium spray gun is provided with in it, bottom connects water lute drainer, and top connects gas fan by pipeline.
10. the recovery method of a converter high-temperature flue gas dry method dust as described in any one of claim 1 to 9 and process waste heat staged equipment, it is characterized in that, comprise the following steps: step (1), steel-making converter produces a large amount of coal gas and is mingled with the mixed flue gas of particulate in smelting process, the vertical flue of mixed gas above steel-making converter and 90 degree of end flues carry out one-level heat exchange cooling, recovered steam;
Step (2), carries out secondary heat exchange cooling by the first steam water heat exchanger, recovered steam from 90 degree of end flues flue gas out;
Step (3), the flue gas after step (2) heat exchange enters spray cooling gas wash tower and carries out three grades of cooling dedustings, the particulate dedusting of removing more than 40um;
Step (4) is after spray cooling gas wash tower, flue gas enters hot precipitator through the bottom of spray cooling gas wash tower, dust falls into the bottom of hot precipitator, and flue gas is entered after the second steam water heat exchanger carries out heat exchange by the neat stress obtained after the top dedusting of hot precipitator and enters converter gas recycling pipeline.
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| CN201510530609.4A CN105087854B (en) | 2015-08-26 | 2015-08-26 | Converter high-temperature flue gas dry method dust and process waste heat staged reclaimer and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106861315A (en) * | 2017-02-25 | 2017-06-20 | 秦皇岛同力达环保能源股份有限公司 | A kind of high temperature membrane dedusting component and high temperature film dust-remover |
| US20190201981A1 (en) * | 2018-01-02 | 2019-07-04 | General Electric Company | Forging head, forging device and additive manufacturing system |
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| CN102538497A (en) * | 2012-03-01 | 2012-07-04 | 九源天能（北京）科技有限公司昆明分公司 | Method and device for recovery and full-effect utilization of flue gas thermal energy of steel converter |
| CN202482346U (en) * | 2012-03-01 | 2012-10-10 | 九源天能（北京）科技有限公司昆明分公司 | Steelmaking converter smoke heat recovery and total-effect utilization device |
| CN204824950U (en) * | 2015-08-26 | 2015-12-02 | 天津泰通金属结构制造有限公司 | Converter high temperature flue gas dry process is removed dust and cascaded recovery plant of process waste heat |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538497A (en) * | 2012-03-01 | 2012-07-04 | 九源天能（北京）科技有限公司昆明分公司 | Method and device for recovery and full-effect utilization of flue gas thermal energy of steel converter |
| CN202482346U (en) * | 2012-03-01 | 2012-10-10 | 九源天能（北京）科技有限公司昆明分公司 | Steelmaking converter smoke heat recovery and total-effect utilization device |
| CN204824950U (en) * | 2015-08-26 | 2015-12-02 | 天津泰通金属结构制造有限公司 | Converter high temperature flue gas dry process is removed dust and cascaded recovery plant of process waste heat |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861315A (en) * | 2017-02-25 | 2017-06-20 | 秦皇岛同力达环保能源股份有限公司 | A kind of high temperature membrane dedusting component and high temperature film dust-remover |
| CN106861315B (en) * | 2017-02-25 | 2022-11-18 | 秦皇岛同力达环保能源股份有限公司 | High temperature membrane dust removal subassembly and high temperature membrane dust remover |
| US20190201981A1 (en) * | 2018-01-02 | 2019-07-04 | General Electric Company | Forging head, forging device and additive manufacturing system |
| US11945032B2 (en) * | 2018-01-02 | 2024-04-02 | General Electric Company | Forging heads and fixing devices with aligned through-holes and cavities |
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| CN105087854B (en) | 2017-07-07 |
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Effective date of registration: 20170417 Address after: 301500 Ninghe economic and Technological Development Zone, Ninghe City, the five weft Road, Tianjin Applicant after: Fang Rui Address before: 301500 Ninghe economic and Technological Development Zone, Ninghe City, the five weft Road, Tianjin Applicant before: TIANJIN TAITONG METAL STRUCTURE MANUFACTURING Co.,Ltd. |
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