CN102304603A - Waste heat recovery and bag-type dust removal system - Google Patents

Abstract

The embodiment of the invention discloses a waste heat recovery and bag-type dust removal system, which comprises: the radiation type vaporization flue is positioned above the converter mouth; a convection type sleeve evaporator connected to a rear end of the radiation type vaporization flue; the radiation type vaporization flue and the convection type sleeve evaporator are respectively connected with the steam pocket; the integral smoke temperature regulator is connected to the rear end of the convection type sleeve evaporator and comprises an evaporator, a condenser, a heat pipe group, a spraying assembly and a water receiving funnel; the converter flue gas bag-type dust collector is connected to the rear end of the flue gas temperature regulator; the invention can reduce the consumption of steam and water to the utmost extent and can recover the sensible heat of the converter gas.

Description

Waste heat recovery and bag-type dust removal system

Technical field

The invention relates to a kind of waste heat recovery and bag-type dust removal system.

Background technology

At present, the converter steelmaking gas dust removal system generally has two kinds, and first kind is OG method (wet method) dust-removal system, and second kind is LT, DDS method (semidrying) dust-removal system.

Shown in Figure 1A, wet method dedusting system comprises gasification cooling flue 1 ', spray column 2 ', water trap 3 ', induced draft fan 4 ', cigarette fontanel 5 ' and gas chamber 6 '.The high-temperature flue gas that produces from converter Z at first passes through cooling stack 2 ' and cools off; Make gas temperature be reduced to 800 ℃-1000 ℃; Coal gas after the cooling gets into spray column 2 ' then; Adopt the cooling of flue gas water spray, removing the flue dust in the flue gas, the sewage of band flue dust through separate, concentrate, processing such as dehydration send sintering; The purified gas of handling through spray column 2 ' then dewaters through water trap 3 ', and under the effect of induced draft fan 4 ', qualified coal gas gets into gas chamber 6 ' and stores then, and underproof coal gas carries out burning and exhausting through chimney 5 '.

In the above-mentioned wet method dedusting system, whole process adopts wet processing, and its dust content of gas is high, and very serious to the sensible heat waste of flue gas, the water yield of consumption is big, and can cause secondary pollution, and the wastewater treatment expense is big, and floor space is big; In addition, owing to adopt wet processing, therefore must adopt water trap 3 ' that the moisture content in the coal gas is sloughed, thereby further increase cost.

Shown in Figure 1B, the semidrying dust-removal system comprises gasification cooling flue 1 ", evaporative cooler 2 ", electric dust collector 3 " and, induced draft fan 4 ", chimney 5 " and, gas cooler 6 " and gas chamber 7 ".The high-temperature flue gas that produces from converter Z at first passes through gasification cooling flue 1 " cool off; be reduced to 800 ℃-1000 ℃ at the bottom of making coal gas temperature, the coal gas after the cooling gets into evaporative cooler 2 then ", evaporative cooler 2 " steam mixed with water spray into flue gas; so that flue gas cool-down; flue gas then gets into electric dust collector 3 ", carry out further dedusting, then at induced draft fan 4 " effect under; underproof coal gas is through chimney 5 " carry out burning and exhausting, qualified coal gas is through gas cooler 6 " cool off laggard gas chamber 7 " storage.

Above-mentioned semidrying dust-removal system, it is for wet method dedusting system, and dust content of gas is low, and water loss is little, and the water treatment expense is low; But the possibility of semidrying dust-removal system generation gas explosion is big, and a large amount of sensible heats in the flue gas are not utilized, and also need consume a large amount of steam, still can produce spent process water.

Therefore, be necessary to provide a kind of novel waste heat recovery and bag-type dust removal system, to overcome above-mentioned shortcoming.

Summary of the invention

The objective of the invention is, a kind of waste heat recovery and bag-type dust removal system are provided, reducing the consumption of steam and water to greatest extent, and can reclaim sensible heat of converter coal gas.

Above-mentioned purpose of the present invention can adopt following technical proposal to realize,

A kind of waste heat recovery and bag-type dust removal system, it comprises:

The radial pattern evaporated flue, it is positioned at the top of converter mouth;

The convection casing tube evaporator, it is connected in the rear end of said radial pattern evaporated flue;

Drum, said radial pattern evaporated flue links to each other with drum respectively with the convection casing tube evaporator;

The monobloc(k)type fume temperature regulator, it is connected in the rear end of said convection casing tube evaporator, and said fume temperature regulator comprises: vaporizer, it is arranged in the high-temperature flue gas passage; Condensing surface, it is arranged in the low-temperature flue gas passage, cuts apart through dividing plate between said condensing surface and the vaporizer; Heat pipe pipe group, it passes said dividing plate, and a part is positioned at vaporizer and forms evaporator section, and another part is positioned at condensing surface and forms condensation segment, has heat-transfer working medium in the said heat pipe pipe group, the closed at both ends of said heat pipe pipe group; The spray assembly, it is arranged on the said condensing surface, and said spray assembly is positioned at the top of heat pipe pipe group; The water receiving funnel; On the inwall of the below that is connected said condensing surface all around hermetically of its upper end; And be positioned at the below of said heat pipe pipe group, and the lower end of said water receiving funnel connects water tank through drainage tube, and the below of said condensing surface is with water seal sealing means secluding air;

The converter gas sack cleaner, it is connected in the rear end of said fume temperature regulator;

The coal-gas recovering tapping equipment, it is connected in the rear end of said converter gas sack cleaner through blower fan.

In preferred embodiment, said heat pipe pipe group is obliquely installed, and epimere is said condensation segment, and hypomere is said evaporator section.

In preferred embodiment, said heat pipe pipe group comprises a plurality of heat pipes that laterally arrange, and said heat-transfer working medium, the closed at both ends of each heat pipe are set in each heat pipe.

In preferred embodiment, said spray assembly comprises the moisturizing tube bank, and the below of moisturizing tube bank is provided with a plurality of nozzles, and said moisturizing tube bank comprises a plurality of filling pipes, and each filling pipe all is connected with a moisturizing house steward, and said moisturizing house steward has water supplement port.

In preferred embodiment, said spray assembly comprises water supply tank, and said water supply tank has a water supplement port, and the bottom of said water supply tank is provided with a plurality of nozzles equably.

In preferred embodiment, said water tank is the open tank of top cover sealing, and the outside surface of said heat pipe is wound with fin, and the drainage tube of the lower end of said water receiving funnel is connected to the position below the liquid level in the said water tank.

In preferred embodiment, said system also comprises first exhaust gases passes and second exhaust gases passes, and an end of said first exhaust gases passes is connected the lower end of said condensing surface, and the other end is connected on the pipeline of exit end of said blower fan; One end of said second exhaust gases passes is connected the upper end of said condensing surface, and the other end is connected on the pipeline of exit end of said sack cleaner.

In preferred embodiment, the front portion of said blower fan is provided with gas cooler, and the other end of said second exhaust gases passes is connected on the pipeline between said sack cleaner and the gas cooler.

In preferred embodiment; Said convection casing tube evaporator comprises flue; On said flue, be inserted with heat exchanger package, each heat exchanger package has more than one interchanger, and each said interchanger is box double-tube heat exchanger of duplex or header type double-tube heat exchanger up and down.

In preferred embodiment, the box double-tube heat exchanger of said duplex comprises:

Water-inlet header, its at least one end is a fluid inlet;

Go out water manifold, its at least one end is a liquid outlet;

More than one sleeve pipe, each sleeve pipe comprise outer tube and the interior pipe that is set in the outer tube, have circumferential weld between the said inner and outer pipe, are provided with spacing column between said interior pipe and the outer tube; The upper end of pipe is communicated with said water-inlet header in said, the lower ending opening of said interior pipe, and be positioned at outer tube; The upper end of said outer tube goes out water manifold and is communicated with the lower end closed of said outer tube with said.

In preferred embodiment, said water-inlet header is set in out the inside of water manifold, has the gap between the said water-in and water-out header; Be provided with reference column between the said water-in and water-out header; Perhaps, said water-inlet header is with to go out water manifold separate.

In preferred embodiment, said water-inlet header with go out water manifold and be respectively the inside that laterally is plugged in said flue, said sleeve pipe longitudinally is positioned at said flue; Perhaps, said water-inlet header with go out the outside that water manifold is arranged in said flue, said sleeve pipe laterally or obliquely is positioned at said flue.

In preferred embodiment, said header type double-tube heat exchanger up and down comprises:

Upper header, it laterally is plugged on the said flue, and at least one end of said upper header is the heat-eliminating medium outlet;

Lower collecting box, it is arranged at the below of said upper header abreast, and laterally is plugged on the said flue, and at least one end of said lower collecting box is the heat-eliminating medium inlet;

A plurality of sleeve pipes; It longitudinally is positioned at said flue; And be connected between the said upper and lower header, each said sleeve pipe comprises inside and outside sheathed interior pipe and outer tube with one heart, has the but circumferential weld of medium circulation of cooling between the said inner and outer pipe; Said upper and lower header is interconnected through outer tube, and said interior pipe is perforation setting;

The upper end of each said outer tube is fixedly connected with the medial surface of said upper header, and the lower end is fixedly connected with the medial surface of said lower collecting box; The two ends of pipe were fixedly connected with the outer side of said upper and lower header respectively in each was said.

In preferred embodiment, said converter gas sack cleaner comprises cylindrical shell, has inlet mouth and venting port on the said cylindrical shell; Be provided with filter bag lattice board and a plurality of said filter bag in the said cylindrical shell, a plurality of filter bags laterally hang on the filter bag lattice board respectively abreast; Said cylindrical shell is vertical and cylindrical, and it is conical that the top of cylindrical shell is, and the bottom of cylindrical shell is circular-arc;

The central interior of said cylindrical shell is provided with sedimentation pipe, and said sedimentation pipe passes from said filter bag, and its inlet is said inlet mouth and the top that is positioned at cylindrical shell, and its outlet is positioned at the below of the inside of cylindrical shell; Said venting port is positioned at the conical top of cylindrical shell;

The bottom of said sedimentation pipe is provided with airflow-distribution board, and it is positioned at the below of said filter bag; The internal diameter of said airflow-distribution board and said cylindrical shell adapts, and its central authorities are provided with the centre hole that a caliber with said sedimentation pipe is complementary, and is provided with a plurality of communicating poress around the centre hole.

In preferred embodiment, the top of said filter bag is provided with deashing device, and said deashing device comprises two cover pulse blowing component, and it is installed in the top of said filter bag symmetrically, and lays respectively at said cylindrical shell both sides;

The said pulse blowing component of every cover comprises laterally a plurality of and is installed on the winding-up pipe of said cylindrical shell abreast; The below of each winding-up pipe is provided with a plurality of nozzles; The outer end of winding-up pipe is connected with the control piece that the gas bag gas interior with controlling gas bag periodically gets into the winding-up pipe, and said gas bag and control piece all are positioned at outside the cylindrical shell; The bottom of said cylindrical shell is provided with ash-unloading slot, and the bottom of said cylindrical shell also is provided with above said ash-unloading slot and scrapes apparatus for ash; Said ash-unloading slot directly is connected with defeated grey equipment; The upper conical portion of said cylindrical shell is provided with a plurality of self-closing gas safety explosion venting valves.

In preferred embodiment, corner, said radial pattern evaporated flue top is provided with curtain wall pushing off the slag pipe;

Said flue gas reclaims tapping equipment and comprises switching station, and said switching station one side links to each other with said converter gas sack cleaner through said blower fan, and opposite side is connected with gas chamber with chimney respectively.

The characteristics and the advantage of waste heat recovery of the present invention and bag-type dust removal system are:

1, the converter high-temperature flue gas can obtain the purified gas of clean higher calorific value after native system is handled, it can be used for generating electricity or equipment for vacuum refining uses high-quality steam and the recyclable dry dust that utilizes.

2, its recovery waste heat amount is maximum; The dust content of gas that reclaims is low, and the coal gas mass dryness fraction is high, and calorific value is high; Water loss is minimum, need not to consume steam; The dust of collecting is callable dry dust, does not cause secondary pollution, no wastewater treatment expense, and floor space is little.

3, under the prerequisite that guarantees STEELMAKING PRODUCTION, need not to spray into steam or water, reclaim a large amount of steam and coal gas of converter, reduced energy consumption per ton steel, improved economic benefit.

4, in existing fume temperature regulator, condensing surface is to be placed in the air, and its below is an open type, cuts apart with dividing plate between vaporizer and the condensing surface; And evaporator section is arranged in the gas flue, and what walk is high-temperature flue gas, and condensation segment is arranged on outdoor; What walk is air, therefore, need guarantee the making precision of dividing plate; Could guarantee that cryogenic air can not pass through dividing plate to the vaporizer internal leakage, otherwise via dividing plate introducing air in high-temperature flue gas, explosion caused easily;

And in the fume temperature regulator of the embodiment of the invention; Be connected through dividing plate between its condensing surface and the vaporizer, because mobile all is a coal gas in vaporizer and the condensing surface, and being all around of the upper end of the water receiving funnel of condensing surface below is tightly connected; Make that the condensing surface below is to have completely cut off air with the mode that water seal seals; That is to say, all do not have air admission in vaporizer and the condensing surface, thereby guaranteed the security of using.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Figure 1A is the schematic flow sheet of the wet method dedusting system of being correlated with;

Figure 1B is the schematic flow sheet of the semidrying dust-removal system of being correlated with;

Fig. 2 is the schematic flow sheet one of dust-removal system of the present invention;

Fig. 3 is the schematic flow sheet two of dust-removal system of the present invention;

Fig. 4 is the schematic flow sheet three of dust-removal system of the present invention;

Fig. 5 is that the master of monobloc(k)type fume temperature regulator of the present invention looks synoptic diagram;

Fig. 6 is the schematic top plan view of monobloc(k)type fume temperature regulator of the present invention;

Fig. 7 is the structural representation of first kind of convection casing tube evaporator in the dust-removal system of the present invention;

Fig. 8 is the schematic top plan view of the box double-tube heat exchanger of duplex of first kind of convection casing tube evaporator of the present invention;

Fig. 9 is the A-A line diagrammatic cross-section along Fig. 8;

Figure 10 is the B-B line diagrammatic cross-section along Fig. 8;

Figure 11 is that the box double-tube heat exchanger of duplex of the present invention is inserted in a kind of mode synoptic diagram in the flue, and the arrow among the figure shows flue gas flow direction;

Figure 12 is that the box double-tube heat exchanger of duplex of the present invention is inserted in the another kind of mode synoptic diagram in the flue, and the arrow among the figure shows flue gas flow direction;

Figure 13 is that the box double-tube heat exchanger of duplex of the present invention is inserted in another the mode synoptic diagram in the flue, and the arrow among the figure shows flue gas flow direction;

Figure 14 is that the box double-tube heat exchanger of duplex of the present invention is inserted in another the mode synoptic diagram in the flue, and the arrow among the figure shows flue gas flow direction;

Figure 15 is the structural representation of second kind of convection casing tube evaporator in the dust-removal system of the present invention;

Figure 16 is the schematic top plan view of the double-tube heat exchanger of header type up and down of second kind of convection casing tube evaporator of the present invention;

Figure 17 is the A-A line diagrammatic cross-section along Figure 16;

Figure 18 is the B-B line diagrammatic cross-section along Figure 16;

Figure 19 is that the master of converter gas sack cleaner of the present invention looks diagrammatic cross-section;

Figure 20 is the pulse blowing component and the cylindrical shell bonded schematic top plan view of converter gas sack cleaner of the present invention;

Figure 21 is the structural representation of the pulse blowing component of converter gas sack cleaner of the present invention.

Embodiment

To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

Embodiment 1

Extremely shown in Figure 4 like Fig. 2, waste heat recovery and bag-type dust removal system that the present invention proposes, it comprises radial pattern evaporated flue 1, convection casing tube evaporator 2, drum 3, monobloc(k)type fume temperature regulator 7, converter gas sack cleaner 4 and coal-gas recovering tapping equipment 5.Radial pattern evaporated flue 1 is positioned at the top of converter Z fire door; Convection casing tube evaporator 2 is connected in the rear end (i.e. outlet) of radial pattern evaporated flue 1; Radial pattern evaporated flue 1 links to each other with drum 3 respectively with convection casing tube evaporator 2, so that the steam that produces in the retrieving arrangement 1,2 is reclaimed; Fume temperature regulator 7 can adapt to the different operating modes of converter smelting, and flue-gas temperature further is adjusted to suitable temperature, and with the converter gas sack cleaner 4 at protection rear portion, converter gas sack cleaner 4 is connected in the rear end of fume temperature regulator 7; Coal-gas recovering tapping equipment 5 is connected in the rear end of converter gas sack cleaner 4 through blower fan 6.Referring to Fig. 5 and shown in Figure 6, said monobloc(k)type fume temperature regulator 7 comprises vaporizer 71, condensing surface 72, heat pipe pipe group 73, spray assembly 74 and water receiving funnel 75.Said vaporizer 71 is arranged in the high-temperature flue gas passage.Condensing surface 72 is arranged in the low-temperature flue gas passage, cuts apart through dividing plate between said condensing surface 72 and the vaporizer 71.Heat pipe pipe group 73 is passed said dividing plate; A part is positioned at vaporizer 71 and forms evaporator section 731; Another part is positioned at condensing surface 72 and forms condensation segment 732, has heat-transfer working medium (claiming heat-conducting medium again) in the said heat pipe pipe group 73, the right ends sealing of said heat pipe pipe group 73.Spray assembly 74 is arranged on the said condensing surface 72, and is positioned at the top of heat pipe pipe group 73.On the inwall of the below that is connected said condensing surface 72 all around hermetically of the upper end of water receiving funnel 75; And be positioned at the below of said heat pipe pipe group 73; The lower end of said water receiving funnel 75 connects water tank 76 through drainage tube 751, and the below of said condensing surface 72 is with water seal sealing means secluding air.

In the embodiment of the invention; The high-temperature flue gas that converter Z produces is at first lowered the temperature through radial pattern evaporated flue 1, make it to be cooled to 800 ℃～1000 ℃ after, get into convection casing tube evaporator 2 respectively; Fume temperature regulator 7 and converter gas sack cleaner 4 are further to lower the temperature and dedusting; Purified gas after cooling and the dedusting gets into coal-gas recovering tapping equipment 5 subsequently, and qualified coal gas is stored, and underproof coal gas is discharged.

Furthermore, the high-temperature flue gas that comes out from convection casing tube evaporator 2 gets into the vaporizer 71, and 72 of condensing surfaces are arranged in the low-temperature flue gas passage.The evaporator section 731 of heat pipe pipe group 73 places the high-temperature flue gas passage, and the heat-transfer working medium (for example water) in it absorbs heat and produces steam, imports condensation segment 732 into.Spray assembly 74 in the condensing surface 72 ejects quench liquid the heat pipe pipe group of condensation segment 731 is carried out water-cooled cooling; The steam that imports condensation segment 732 into is cooled at condensation segment 732 and forms water after liquid cooling is but lowered the temperature; Water flows into evaporator section 731; Reduce the gas temperature in the high-temperature flue in this way, come out to get into sack cleaner 4 through the flue gas of cooling from vaporizer 71.Quench liquid falls into water receiving funnel 75 after heat pipe pipe group 73 is cooled, and gets into water tank 76 through drainage tube 751, is used to seal the end of water receiving funnel 75, does not allow air to pass through water receiving funnel 75 and gets into condensation side.

In the embodiment of the invention, radial pattern evaporated flue 1 all need not to spray into steam or water with convection casing tube evaporator 2, adopts the indirect heat exchange mode to reduce the temperature of converter gas, thereby reduces the consumption of steam and water to greatest extent; The a large amount of steam that produce in cooling stack 1 and the vaporizer 2 are simultaneously reclaimed by drum 3, thereby have reclaimed sensible heat of converter coal gas, save the energy.

Be connected through dividing plate between condensing surface 72 and the vaporizer 71; Low-temperature flue gas in the condensing surface 72 can leak in the high-temperature flue gas in the vaporizer 71 into through dividing plate; But because vaporizer 71 all is a coal gas with condensing surface 72 interior mobile; And the upper end of the water receiving funnel 75 of condensing surface 72 belows around be and be tightly connected, make that condensing surface 72 belows are that mode with the water seal sealing has completely cut off air, that is to say; All do not have air admission in vaporizer 71 and the condensing surface 72, thereby guaranteed the security of using.In addition, all-in-one-piece fume temperature regulator makes its structure compact more, and cost of manufacture is lower.

Therefore, the embodiment of the invention in use, coal gas of high temperature washes away evaporator section in the vaporizer through gas flue; The evaporator section heat absorption, its inner heat-transfer working medium is undergone phase transition to steam state by liquid state, and heat is conducted to condensing surface; Receive air cooling, behind the heat-transfer working medium condensation heat, become liquid state again; Get back in the evaporator section, accomplish a circulation.

According to an embodiment of the invention, said heat pipe pipe group 73 is obliquely installed, and epimere is said condensation segment 732, and hypomere is said evaporator section 731.When the heat-transfer working medium in the heat pipe pipe group 73 after evaporator section 731 absorbs heats and produces steam; Flow into the condensation segment 732 of epimere; And at condensation segment 732 formation water after the quench liquid cooling of spray assembly 74 ejections, and flow into evaporator section 731 again, go round and begin again; The heat pipe pipe group 73 that tilts makes the mobile more smooth and easy of steam and water in the heat pipe pipe group 73, and cooling performance is better.

Furthermore, said heat pipe pipe group 73 comprises a plurality of heat pipes that laterally arrange, and said heat-transfer working medium is set in each heat pipe, the right ends sealing of each heat pipe.Wherein, each heat pipe can be straight tube, also can be curved tube, not as limit, as long as the steam of evaporator section 731 and the water of condensation segment 732 can be flowed each other.

According to an embodiment of the invention, said spray assembly 74 comprises moisturizing tube bank 741, and an end of said moisturizing tube bank 741 is water supplement port 741a, and the below of moisturizing tube bank 741 is provided with a plurality of nozzles 742.Cooling liqs such as water gets into moisturizing tube bank 741 from water supplement port 741a, and ejection from nozzle 742, and the liquid of ejection can be injected into the outside surface of condensation segment 732.

Specifically be, moisturizing tube bank 741 comprises a plurality of filling pipes, and each filling pipe all is connected with a moisturizing house steward, and the moisturizing house steward has water supplement port 741a, and cooling liqs gets into each filling pipe from water supplement port 741a through the moisturizing house steward.Wherein, nozzle 742 can be restrained 741 length direction along moisturizing and evenly arranged, so that liquid can cover condensation segment 732 all outer surfaces as much as possible; The quantity of nozzle 742 and position can be determined on a case-by-case basis, as long as make the heat pipe in each condensation segment 732 all can be directed onto water.Wherein, moisturizing tube bank 741 can be parallel with heat pipe pipe group 73, i.e. moisturizing tube bank 741 also is obliquely installed, and it is identical to make that nozzle 742 arrives the distance of heat pipe of condensation segments 732, and cooling evenly.In addition, moisturizing tube bank 741 also can be replaced by a water supply tank, and water supply tank has a water supplement port, and the bottom of water supply tank is provided with a plurality of nozzles 742 equably.

According to an embodiment of the invention, said water tank 76 is the open tank of top cover sealing.

The outside surface of said heat pipe is wound with fin, with the expansion heat transfer area.

The drainage tube 751 of the lower end of said water receiving funnel 75 is connected to the position below the liquid level in the said water tank 76.Specifically; Said water tank 76 has a water port, and said water port has a segment distance apart from the bottom surface of water tank 76, and the liquid level in the water tank 76 is maintained on the certain height; The lower end of drainage tube 751 is positioned at the lower position of said liquid level, thereby has the effect of lasting water seal sealing.

According to an embodiment of the invention, to shown in Figure 4, said system also comprises first exhaust gases passes 77 and second exhaust gases passes 78 referring to Fig. 2.One end of said first exhaust gases passes 77 is connected the lower end of said condensing surface 72, and the other end is connected on the pipeline of exit end of said blower fan 6, and the lower end of said water receiving funnel 75 and corresponding place, top position at said water tank 76 are provided with exhaust hole; One end of said second exhaust gases passes 78 is connected the upper end of said condensing surface 72, and the other end is connected on the pipeline of exit end of said sack cleaner 4.That is to say; The a part of low-temperature flue gas that comes out from blower fan 6 passes through the lower end entering condensation segment 732 of first exhaust gases passes 77 from condensing surface 72; Then the upper end from condensing surface 72 gets into the pipeline of sack cleaners 4 rear ends through second exhaust gases passes 78, makes to be formed with low temperature self-circulation flue gas in the condensing surface 72 residing low-temperature flue gas passages.

In addition, the front portion of said blower fan 6 can be provided with gas cooler 8, and the other end of said second exhaust gases passes 78 is connected on the pipeline between said sack cleaner 4 and the gas cooler 8.Can make that so the low-temperature flue gas that comes out from condensing surface 72 upper ends can be through the entering system again after the gas cooler 8 further coolings.

The embodiment of the invention simple in structure, good heat dissipation effect, heat exchange efficiency is high, is a kind of ideal cooling heat transferring utensil, is particularly suitable for the coal gas of converter dry gas cleaning, is used to cool off coal gas.

Need to prove that the fume temperature regulator 7 among Fig. 2 to Fig. 4 only is a synoptic diagram, the shell of condensing surface does not wherein illustrate.

Embodiment 2

In this embodiment, said convection casing tube evaporator 2 comprises flue 21, on flue 21, is inserted with heat exchanger package, has three heat exchanger package herein; Each heat exchanger package has more than one interchanger, and each said interchanger can be box double-tube heat exchanger of duplex 22 or header type double-tube heat exchanger 23 up and down.

Wherein, said flue 21 can adopt the furnace wall setting, specifically can be light boiler setting, further can be the adiabatic light boiler setting.The setting of furnace wall can supply interchanger to install more easily.In addition, flue 21 comprises entrance flue, transition section flue and outlet section flue, and said interchanger mainly is installed on the transition section flue.

Specify the box double-tube heat exchanger of duplex 22 or the structure of header type double-tube heat exchanger 23 up and down below.

What Fig. 7 to Figure 14 showed is duplex housing-case tube heat-exchanger 22.The box double-tube heat exchanger 22 of duplex, it comprises water-inlet header 221, goes out water manifold 222 and more than one sleeve pipe 223.At least one end of water-inlet header 221 is a fluid inlet, and at least one end that goes out water manifold 222 is a liquid outlet; Each sleeve pipe 223 comprises outer tube 224 and interior pipe 225, and interior pipe 225 is set in the outer tube 224, inner and outer pipe 25, has circumferential weld between 24, circulates for heat-eliminating medium; Be provided with spacing column 226 between pipe 225 and the outer tube 224 in said; Inner and outer pipe 225,224 is located through spacing column 226 between the two; The quantity of spacing column 226 can be decided according to the length of inner and outer pipe, and so, the width of the circumferential weld in making between pipe 225 and the outer tube 224 is more fixing; The upper end of interior pipe 225 is communicated with water-inlet header 221, the lower ending opening of interior pipe 225, and be positioned at outer tube 224; The upper end of outer tube 224 with go out water manifold 222 and be communicated with the lower end closed of outer tube 224.

The box double-tube heat exchanger 22 of the duplex of the embodiment of the invention is then got into the flue 21 of convection casing tube evaporator 2 by the flue gas after radial pattern evaporated flue 1 cooling in use, and flue gas washes away the box interchanger 22 of duplex from top to down; Simultaneously, heat-eliminating medium (be water here, further can be soft water) flows into from the fluid inlet of water-inlet header 221; Then the upper end from interior pipe 225 gets into interior pipe 225, because the lower ending opening of interior pipe 225, and be positioned at outer tube 224; Therefore heat-eliminating medium then from the lower end inflow inner and outer pipe 25 of interior pipe 225, the circumferential weld between 24, flows into out water manifold 222 afterwards, and flows out from its liquid outlet; That is to say, water in interchanger 22 with flue 21 in flue gas carry out heat exchange, produce steam; Steam can and be used by drum 3 recovery, for example is used for generating or production.Adopt the box double-tube heat exchanger 22 of duplex of the present invention can gas temperature be reduced to about 300 ℃.

According to one embodiment of present invention, cooperate shown in Figure 9ly, in each interchanger 22, said water-inlet header 221 is set in out the inside of water manifold 222, said water-in and water-out header 221, has the gap between 222.Wherein, but water-inlet header 221 and go out arranged concentric between the water manifold 222 makes the width in water-in and water-out header 221, the gap between 222 identical.Further, water-inlet header 221 and go out between the water manifold 222 reference column can be set makes water-in and water-out header 221, relative positioning between 222.Heat-eliminating medium is through behind the inner and outer pipe 225, the circumferential weld between 224, and the water-inlet header 221 and go out the gap between the water manifold 222 of then flowing through flows out from the liquid outlet that goes out water manifold 222 again.

Herein, water-in and water-out header 221,222 is respectively laterally to be plugged in flue 21 inside, and sleeve pipe 223 longitudinally is positioned at flue 21 inside, makes the sweep of gases place comprise the outside surface of water manifold 222, the outside surface of outer tube 224.That is to say that go out under the flue gas in the flue 1 is enterprising, sleeve pipe 223 is a parallel baffled, header is a transversal flow, so can avoid the local accumulation of coal gas of converter, slows down the dust stratification of heat-transfer surface, has guaranteed the heat exchange efficiency and the security of equipment.In this embodiment, also can water port be set going out the end of water manifold 222 away from liquid outlet, as shown in Figure 9.

Wherein, water-in and water-out header 221,222 can flatly also tiltably be plugged in flue 21 inside.If be obliquely installed, can be only that water-in and water-out header 221,222 is a higher end is as liquid inlet and outlet; If be horizontally disposed with, then can be with the two ends of water-inlet header 221 all as fluid inlet, the two ends that will go out water manifold 222 are all as liquid outlet.

In addition, cooperate shown in Figure 11, but also entire arrangement is in the outside of flue 21 for water-in and water-out header 221,222,223 of sleeve pipes laterally are positioned at flue 21 inside, so make the sweep of gases place comprise the outside surface of outer tube 224, arrow among Figure 11 shows flue gas flow direction.In addition, shown in figure 12, sleeve pipe 223 also tiltably is positioned at flue 21 inside.

According to one embodiment of present invention; Cooperate shown in Figure 13; Be set in out at water-inlet header 221 under the situation of water manifold 222 inside, an end of water-inlet header 221 is a fluid inlet, and an end that goes out water manifold 222 is a liquid outlet; Liquid inlet and outlet is corresponding, and said water-in and water-out header 221,222 links to each other with inner and outer pipe 225,224 respectively with the bend pipe form at the end away from liquid inlet and outlet.Wherein, the diameter of water-in and water-out header 221,222 can be constant, also can diminish gradually from the end to end of liquid inlet and outlet, depending on the circumstances or the needs of the situation decides.

According to one embodiment of present invention; Cooperate shown in Figure 14, in each interchanger 22, said water-inlet header 221 with go out water manifold 222 can be separate; Be the outside that water-inlet header 221 is positioned at water manifold 222, water-inlet header 221 and go out between the water manifold 222 parallel or substantially parallel.So, after heat-eliminating medium passed through inner and outer pipe 225, the circumferential weld between 224, the water manifold 222 of then flowing through out flowed out from its liquid outlet again.At this moment, the sweep of gases place comprises the outside surface of water-inlet header 221, goes out the outside surface of water manifold 222, the outside surface of outer tube 224, that is and, the sweep of gases area is bigger, and its heat exchange effect is preferable.

The outer wall of said interior pipe 225 and the inwall of outer tube 224 can be shiny surface respectively or have the not only sliding surface of groove; Said groove can be helicitic texture, ripple struction, linear or spiral groove, and the cross-sectional shape of this groove can be semicircle, rectangle, square or broached-tooth design.Wherein, the coefficient of heat transfer can effectively be improved because of wall is rough, and therefore, above-mentioned not only sliding surface with groove can make the heat exchange better effects if.In addition, because in the exchange of interchanger and flue gas heat, major part is all undertaken by sleeve pipe 223, therefore, can only make the inwall of interior outer wall of managing and outer tube be not only sliding surface; Certainly, the inwall of water-in and water-out header 221,222 also can be not only sliding surface, optionally is provided with.

Therefore; Convection casing tube evaporator 2 of the present invention has overcome the defective that existing afterheat of converter gas retrieving arrangement can not reclaim 800 ℃ of coal gas of converter～1000 ℃ of following flue gas heat; But reclaim converter gas sensible heat in existing converter evaporation cooling air flue continued, guarantee that simultaneously coal gas of converter reclaims safely and reliably; The inner and outer pipe 225,224 of interchanger all only has an end to be connected with header, therefore has certain degree of freedom, and the antiknock ability is strong; In addition, under the prerequisite that guarantees STEELMAKING PRODUCTION and RECOVERY OF CONVERTER GAS, need not to spray into steam or water, directly reclaim the sensible heat of low-temperature zone in the coal gas of converter, produce steam, reduced energy consumption per ton steel, improved economic benefit.

Figure 15 to Figure 18 shows is header type double-tube heat exchanger 23 up and down.Header type double-tube heat exchanger 23 comprises upper header 231, lower collecting box 232 and a plurality of sleeve pipe 233 up and down.Lower collecting box 232 is arranged on the below of upper header 231 parallel or substantially parallelly; Upper and lower header 231,232 laterally is plugged on the flue 21 respectively; And expose the end of upper and lower header 231,232; At least one end of upper header 231 is the heat-eliminating medium outlet, and at least one end of lower collecting box 232 is the heat-eliminating medium inlet; Sleeve pipe 233 longitudinally is positioned at flue 21, and be connected in upper and lower header 231, between 232.Wherein, each sleeve pipe 233 comprises inside and outside sheathed with one heart interior pipe 234 and outer tube 235, inner and outer pipe 234, has the but circumferential weld of medium circulation of cooling between 235, and said upper and lower header 231,232 is interconnected through outer tube 235, and interior pipe 234 connects and is provided with.Inner and outer pipe 234,235 concentric settings can make that the width of the circumferential weld between the two is consistent, and the water in the circumferential weld can absorb the heat in the flue gas better, and flue gas is cooled off better.

The embodiment of the invention in use; Flue gas by after 1 cooling of radial pattern evaporated flue then gets into flue 21; Flue gas washes away header type interchanger 23 up and down from top to down; Furthermore, the sweep of gases place comprises the outside surface of upper header 231, the internal surface of interior pipe 234, the outside surface of outer tube 235 and the outside surface of lower collecting box 232; Simultaneously, heat-eliminating medium (be water here, further can be soft water) flows into from the water-in of lower collecting box 232; Then flow into upper header 231 from inner and outer pipe 234, circumferential weld between 235; And flow out from the water outlet of upper header 231, that is to say that water carries out heat exchange with flue gas in interchanger 23; Produce steam, steam can and be used by drum 3 recovery.

In addition, go out under the flue gas in the flue 21 is enterprising, interior pipe 234, outer tube 235 are parallel baffled; Upper header 231 is a transversal flow with lower collecting box 232; So can avoid the local accumulation of coal gas of converter, slow down the dust stratification of heat-transfer surface, guarantee the heat exchange efficiency and the security of equipment.Adopt header type double-tube heat exchanger 23 up and down of the present invention can gas temperature be reduced to about 300 ℃.

Figure 16 demonstrates, and each heat exchanger package comprises four lower collecting box 232, and the top correspondence of each lower collecting box 232 is provided with a upper header 231, each other corresponding upper and lower header 231, a plurality of sleeve pipes 233 is set between 232.Wherein, can be separate between each lower collecting box 232, also can be connected to end, can be separate between each upper header 231, also can be connected to end.In addition, the quantity of the lower collecting box 232 in each heat exchanger package is not limited to four, and it also can be below four, or more than four, looks installing space and decides.

According to one embodiment of present invention, at least one end of said lower collecting box 232 is a heat-eliminating medium inlet (for example water-in), and at least one end of upper header is heat-eliminating medium outlet (for example water outlet).Wherein, the substantially parallel setting of upper and lower header, but and level or be inserted in flue 21 obliquely.If be obliquely installed, can be only that lower collecting box 232 is a lower end is as water-in, and only that upper header 231 is a higher end is as water outlet; If be horizontally disposed with, then can be with the two ends of lower collecting box 232 all as water-in, with the two ends of upper header 231 all as water outlet.

Furthermore, if each upper and lower header the 231, the 232nd, separate respectively situation, at least one end of each lower collecting box 232 is the heat-eliminating medium inlet so, at least one end of each upper header 231 is the heat-eliminating medium outlet.

If each upper and lower header the 231, the 232nd, situation about being communicated with end to end respectively; The head end of so a plurality of lower collecting box or one of them end of caudal end are the heat-eliminating medium inlet, and the head end of a plurality of upper headers or one of them end of caudal end are the heat-eliminating medium inlet.

Certainly, above-mentioned heat-eliminating medium inlet also can be arranged on the upper header, and the heat-eliminating medium outlet then is arranged on the lower collecting box.

The interchanger of present embodiment can adopt the mode of natural circulation, and the equivalent length (being contained in the stroke that passes in and out header up and down) in the water circulation calculation of each cover tube loop is basic identical, can guarantee that natural circulation is safe and reliable.

Cooperate shown in Figure 17ly, the upper end of each outer tube 235 is fixedly connected with the medial surface of upper header 231, and the lower end is fixedly connected with the medial surface of lower collecting box 232; Pipe 234 in being penetrated with in each outer tube 235, the two ends of pipe 234 are fixedly connected with the outer side of upper and lower header 231,232 respectively in each.Wherein, pipe 234 and outer tube 235 can be vertically or with the angle layout of near vertical in each, make flue gas parallel baffled inner and outer pipe 234,235 in the flue 2.

The outer wall of said interior pipe 234 and the inwall of outer tube 235 can be shiny surface respectively or have the not only sliding surface of groove; Said groove can be helicitic texture, ripple struction, linear or spiral groove, and the cross-sectional shape of this groove can be semicircle, rectangle, square or broached-tooth design.Wherein, the coefficient of heat transfer can effectively be improved because of wall is rough, and therefore, above-mentioned not only sliding surface with groove can make the heat exchange better effects if.In addition, because in the exchange of interchanger and flue gas heat, major part is all undertaken by sleeve pipe 233, therefore, can only make the inwall of interior outer wall of managing and outer tube be not only sliding surface; Certainly, the inwall of upper and lower header also can be not only sliding surface, optionally is provided with.

Other structures, principle of work and the beneficial effect of this embodiment is identical with embodiment 1, repeats no more at this.

Embodiment 3

In this embodiment, can be provided with the deashing device (not shown) in the said convection casing tube evaporator 2, because in vaporizer 2; The sweep of gases interchanger; Can accumulated powder dirt at the outside surface of interchanger, but the dust on the deashing device heat exchanging device remove, so not only avoided water wall tube because of the inhomogeneous and contingent booster phenomenon of local heating; Reduce dust in flue gas simultaneously and on heat-transfer surface, accumulated the heat exchange efficiency that causes and reduce, guaranteed to install 2 operational efficiency and work-ing life.

Can be provided with a plurality of access openings on the flue 21 of convection casing tube evaporator 2, the interchanger in it overhauled with the handled easily person.

Behind the bottom of convection casing tube evaporator 2 closed ash conveying device 9 can be set, transferring out from the dry dust that interchanger 2 falls, dry dust can reclaim, and does not cause secondary pollution.In addition, convection casing tube evaporator 2 also can divide two sections forward and backward sides that lay respectively at closed ash conveying device 9.

Other structures, principle of work and the beneficial effect of this embodiment is identical with embodiment 1 or 2, repeats no more at this.

Embodiment 4

In this embodiment, cooperate Figure 19 to shown in Figure 21, said converter gas sack cleaner 4 comprises cylindrical shell 41, has 412 mouthfuls of air inlets and venting port 413 on the said cylindrical shell 41.Be provided with filter bag lattice board 421 and a plurality of said filter bags 42 (cloth bag just) in the said cylindrical shell 41, a plurality of filter bags laterally hang on the filter bag lattice board respectively abreast, make filter bag 42 have many row's shapes.Said cylindrical shell 41 is vertical and cylindrical, and the top of cylindrical shell 41 is taper shape 414, and the bottom of cylindrical shell 41 is circular-arc 415.Wherein, filter bag 42 can adopt high temperature resistant, HS, cloth antistatic, long service life to make.

Dust-laden coal gas (or claim raw gas) gets into the bottom of cylindrical shells 41 from inlet mouth 412, gets into filter bag 42 then and carries out dedusting, makes grit in the flue gas be attached on the outside surface of filter bag 42, discharges from venting port 413 through filter bag 42 dust separating purified gas.And because cylindrical shell 41 is vertical and cylindrical, it is conical 414 that the top of cylindrical shell 41 is, and it is circular-arc 415 that the bottom of cylindrical shell 41 is, thereby make cylindrical shell 41 have the characteristics of high pressure resistant antiknock, and avoid coal gas to gather at the dead angle of flow process, and confined explosion takes place.

According to an embodiment of the invention, the central interior of said cylindrical shell 1 is provided with sedimentation pipe 411, and sedimentation pipe 411 passes from filter bag 42, and the inlet of sedimentation pipe 411 is inlet mouth 412 and the top that is positioned at cylindrical shell 41, and its outlet is positioned at the below of the inside of cylindrical shell 41; Said venting port 413 is positioned at the conical top of cylindrical shell 41.Wherein and since sedimentation pipe 411 be arranged in cylindrical shell 1 be formed centrally the center sedimentation pipe, so can make filter bag 42 filter dust comparatively equably.

The bottom of said sedimentation pipe 411 can be provided with airflow-distribution board 4111, and it is positioned at the below of filter bag 42; Airflow-distribution board 4111 adapts with the internal diameter of cylindrical shell 41, and the central authorities on it are provided with the centre hole that a caliber with sedimentation pipe 411 is complementary, centre hole be provided with a plurality of communicating poress on every side.Through the coal gas that sedimentation pipe 411 gets into, then get into the bottom of airflow-distribution board 4111 via centre hole, the back of turning back is up walked from communicating pores, filters through filter bag 42 again; That is, dedusting coal gas is turned back upwards after through the through fly-ash separators of sedimentation pipe 411 bottom, and carries out air-flow reallocation back entering filter bag 42 through airflow-distribution board 4111 and filter.

Dust-laden coal gas at first carries out the sedimentation of macrobead dust through sedimentation pipe 411; Turn back behind the bottom of through fly-ash separator upwards, get into filter bag 42 and carry out dedusting, discharge from the venting port 413 on top through filter bag 42 dust separating purified gas; That is to say; Dust-laden coal gas earlier carried out the sedimentation of macrobead dust through sedimentation pipe 411 before getting into filter bag 42, thereby had reduced the load of filter bag 42, can prolong the work-ing life of filter bag 42.

In addition; The inlet mouth 412 of the embodiment of the invention and venting port 413 all are positioned at the top of cylindrical shell 41, have promptly taked the mode that goes out on enterprising, so are convenient to installation and measuring and maintenance; Help the sedimentation of macrobead dust; And then reduce filter bag 42 loads, prolong life of bag filter, in case help the rapid diffusion of coal gas simultaneously during gas leak.

According to an embodiment of the invention, cooperate Figure 19, shown in 20, the top of said filter bag 42 is provided with deashing device, and said deashing device can comprise two cover pulse blowing component 43, and it is installed in the top of filter bag 42 symmetrically, and lays respectively at cylindrical shell 41 both sides.Because the deashing of deashing device is limited in one's ability; Be that it can only carry out deashing in the scope of certain-length, and in this embodiment owing to adopt the pulse blowing component 43 of bilateral, thereby the diameter of the fly-ash separator cylindrical shell that can obtain to increase; The diameter that promptly is equivalent to cylindrical shell 41 has increased by one times; Therefore filter bag is arranged under the constant situation of spacing cylindrical shell 41 in, and filtration area can be increased to original four times, has significantly increased the filtration area and processing air quantity of single casing.

Cooperate shown in Figure 21 again; Every cover pulse blowing component 43 comprises laterally a plurality of and is installed on the winding-up pipe 431 of cylindrical shell 41 abreast; The position of each winding-up pipe 431 can be corresponding with each row's filter bag 42 respectively; The below of each winding-up pipe 431 is provided with a plurality of nozzles 432, and nozzle 432 can face the filter bag 42 of below vertically downward; The outer end of winding-up pipe 431 is connected with gas bag 433 and control piece 434, and control piece 434 is used to control gases in the gas bag 433 and periodically (regularly or with the level pressure difference combines) and get into winding-up pipe 431, and gas bag 433 all is positioned at outside the cylindrical shell 41 with control piece 434.Wherein, gas bag 433 is built-in can be nitrogen or other suitable gas, for example rare gas element; Control piece 434 can comprise pulse valve 4341, valve 4342 (for example can be SV) and valve 4343, and pulse valve 4341 can open and close high-pressure air source in moment, and valve 4342 is used for the keying of setting pulse valve 4341, and valve 4343 is in normally open; The outer end of winding-up pipe 431 is connected with tracheae 435 through valve 4343, and 435 of tracheaes are connected with gas bag 433, pulse valve 4341 and valve 4342 in regular turn.In use; Nitrogen passes through pulse valve 4341 from gas bag 433; Be several times as much as impulse jet tolerance to wash away filter bag 42 through nozzle 432 from introducing on every side, make filter bag 42 cause the one-shot vibration, thereby filter bag 42 outside surface adherent grits are shaken off the bottom at cleaning apparatus.

According to an embodiment of the invention, the bottom of said cylindrical shell 41 is provided with ash-unloading slot 45, and the bottom of said cylindrical shell 41 also is provided with above ash-unloading slot 45 and scrapes apparatus for ash 451.When deashing device carries out online ash removal to filter bag 42, grit is shaken off behind the bottom of cleaning apparatus, can the grit of shaking off be scraped into ash-unloading slot 45 through scraping apparatus for ash 451, deliver to a grey storehouse through cinder conveyer and air-transport system again, do not cause secondary pollution.

In addition, can directly be connected at ash-unloading slot 45, effectively grit is removed away with defeated grey equipment.Wherein, defeated grey equipment can adopt existing various suitable defeated grey equipment, and form is not limit.

According to an embodiment of the invention, the top of said cylindrical shell 41 is provided with more than one handle hole 46, is provided with four handle holes 46 herein.The operator can get into the converter gas sack cleaner through handle hole 46 and operate, as changes cloth bag etc.

The upper conical portion of said cylindrical shell 41 can be provided with a plurality of self-closing gas safeties on demand and let out the waterfall valve, and when the pressure in the cylindrical shell 41 during greater than set(ting)value, explosion venting valve can be opened automatically; When pressure during less than set(ting)value, explosion venting valve is closed automatically, prevents that air from sucking, and avoids taking place subsequent explosion.

Because; The sack cleaner of the embodiment of the invention has overcome electric precipitator used in existing once dust collection of converter and has had the investment height; Floor space is big, and working cost is high, and efficiency of dust collection is not lasting; All the time exist the shortcoming of the unsafe factor of microexplosion in the production, the present embodiment investment is low, floor space is little; Coal gas dust removal efficient is high, and the dust content that reclaims coal gas is low, and outlet coal gas of converter dustiness can drop to 10mg/Nm ³Below; The coal gas mass dryness fraction of the embodiment of the invention is big, and calorific value is high; System's running resistance and energy consumption are low, and maintenance of the equipment is convenient and expense is low; The dust of collecting through ash-unloading slot can send the dry dust of converter steelmaking through briquetting or Pneumatic ash conveying, does not cause secondary pollution.

Other structures, principle of work and the beneficial effect of this embodiment is identical with one of them of embodiment 1-3, repeats no more at this.

Embodiment 5

In this embodiment, the corner, top of said radial pattern evaporated flue 1 is provided with curtain wall pushing off the slag pipe 11, and the xsect of gasification cooling flue 1 can be circle.Curtain wall pushing off the slag pipe 11 is used to stop that macrobead Mars gets into the convection casing tube evaporator 2 at rear portion, avoids causing the heating surface obstruction of convection casing tube evaporator 2 and the danger of blasting.Wherein, curtain wall pushing off the slag pipe 11 can adopt water-cooled or vaporization refrigerative mode to cool off.

Because 1 of said radial pattern evaporated flue as interchanger, can reclaim gas heat.

Said radial pattern gasification cooling flue 1 and convection casing tube evaporator 2 can shared cover drums 3; Drum 3 links to each other with interchanger in the vaporizer 2 with cooling stack 1 respectively through drum upcast 31, also links to each other with the interchanger of cooling stack 1 with vaporizer 2 respectively through drum downtake 32.The steam that produces in cooling stack 1 and the vaporizer 2 gets into drums 3 through drum upcast 31 respectively, and the steam water interface of drum 3 then gets into the interchanger of cooling stack 1 and vaporizer 2 respectively through downtake 32, to carry out heat exchange.

Said flue gas reclaims tapping equipment 5 and comprises switching station 51, and switching station 51 1 sides link to each other with said converter gas sack cleaner 4 through blower fan 6, and opposite side is connected with gas chamber 53 with chimney 52 respectively.Purified gas after 4 dedustings of converter gas sack cleaner passes through switching station 51, and qualified coal gas gets into gas chamber 53 and stores, and underproof coal gas then burns through chimney 52 and diffuses.

Wherein, said gas cooler also can be arranged on gas chamber 53 front portions (perhaps referring between gas chamber 53 and the blower fan 6), and is as shown in Figure 3, with further reduction temperature of gas.In addition, gas cooler 8 also can be arranged on the front portion (perhaps referring between converter gas sack cleaner 4 and the blower fan 6) of blower fan 6.Certainly, gas cooler 8 is not necessary, and it can not be provided with yet, and is as shown in Figure 2.

Wherein, can be connected through gas line between each device of dust-removal system, furthermore, interconnect through gas line between convection casing tube evaporator 2, fume temperature regulator 7 and the converter gas sack cleaner 4.

Other structures, principle of work and the beneficial effect of this embodiment is identical with one of them of embodiment 1-4, repeats no more at this.

The above is merely several embodiments of the present invention, and those skilled in the art can carry out various changes or modification to the embodiment of the invention and do not break away from the spirit and scope of the present invention according to application documents are disclosed.

Claims (16)

1. waste heat recovery and bag-type dust removal system is characterized in that said dust-removal system comprises:

Radial pattern evaporated flue (1), it is positioned at the top of converter (Z) fire door;

Convection casing tube evaporator (2), it is connected in the rear end of said radial pattern evaporated flue (1);

Drum (3), said radial pattern evaporated flue (1) links to each other with drum respectively with convection casing tube evaporator (2);

Monobloc(k)type fume temperature regulator (7), it is connected in the rear end of said convection casing tube evaporator (2), and said fume temperature regulator (7) comprising:

Vaporizer (71), it is arranged in the high-temperature flue gas passage;

Condensing surface (72), it is arranged in the low-temperature flue gas passage, cuts apart through dividing plate between said condensing surface and the vaporizer;

Heat pipe pipe group (73); It passes said dividing plate, and a part is positioned at vaporizer (71) and forms evaporator section (731), and another part is positioned at condensing surface (72) and forms condensation segment (732); Has heat-transfer working medium in the said heat pipe pipe group, the closed at both ends of said heat pipe pipe group (73);

Spray assembly (74), it is arranged on the said condensing surface (72), and said spray assembly (74) is positioned at the top of heat pipe pipe group (73);

Water receiving funnel (75); On the inwall of the below that is connected said condensing surface (72) all around hermetically of its upper end; And be positioned at the below of said heat pipe pipe group (73); The lower end of said water receiving funnel (75) connects water tank (76) through drainage tube (751), and the below of said condensing surface (72) is with water seal sealing means secluding air;

Converter gas sack cleaner (4), it is connected in the rear end of said fume temperature regulator (7);

Coal-gas recovering tapping equipment (5), it is connected in the rear end of said converter gas sack cleaner (4) through blower fan (6).

2. waste heat recovery according to claim 1 and bag-type dust removal system is characterized in that, said heat pipe pipe group is obliquely installed, and epimere is said condensation segment (732), and hypomere is said evaporator section (731).

3. waste heat recovery according to claim 2 and bag-type dust removal system is characterized in that, said heat pipe pipe group (73) comprises a plurality of heat pipes that laterally arrange, and said heat-transfer working medium, the closed at both ends of each heat pipe are set in each heat pipe.

4. waste heat recovery according to claim 1 and bag-type dust removal system; It is characterized in that; Said spray assembly (74) comprises moisturizing tube bank (741), and the below of moisturizing tube bank is provided with a plurality of nozzles (742), and said moisturizing tube bank comprises a plurality of filling pipes; Each filling pipe all is connected with a moisturizing house steward, and said moisturizing house steward has water supplement port (741a).

5. waste heat recovery according to claim 1 and bag-type dust removal system is characterized in that, said spray assembly (74) comprises water supply tank, and said water supply tank has a water supplement port, and the bottom of said water supply tank is provided with a plurality of nozzles equably.

6. waste heat recovery according to claim 1 and bag-type dust removal system is characterized in that, said water tank (76) is the open tank of top cover sealing, and the outside surface of said heat pipe is wound with fin; The drainage tube of the lower end of said water receiving funnel is connected to the position below the liquid level in the said water tank.

7. according to any described waste heat recovery of claim 1 to 6 and bag-type dust removal system; It is characterized in that; Said system also comprises first exhaust gases passes (77) and second exhaust gases passes (78); One end of said first exhaust gases passes (77) is connected the lower end of said condensing surface (72), and the other end is connected on the pipeline of exit end of said blower fan (6); One end of said second exhaust gases passes (78) is connected the upper end of said condensing surface (72), and the other end is connected on the pipeline of exit end of said sack cleaner (4).

8. waste heat recovery according to claim 7 and bag-type dust removal system; It is characterized in that; The front portion of said blower fan (6) is provided with gas cooler (8), and the other end of said second exhaust gases passes (78) is connected on the pipeline between said sack cleaner (4) and the gas cooler (8).

9. waste heat recovery according to claim 8 and bag-type dust removal system; It is characterized in that; Said convection casing tube evaporator (2) comprises flue (21); On said flue, be inserted with heat exchanger package, each heat exchanger package has more than one interchanger, and each said interchanger is box double-tube heat exchanger of duplex (22) or header type double-tube heat exchanger (23) up and down.

10. waste heat recovery according to claim 9 and bag-type dust removal system is characterized in that, the box double-tube heat exchanger of said duplex (22) comprising:

Water-inlet header (221), its at least one end is a fluid inlet;

Go out water manifold (222), its at least one end is a liquid outlet;

More than one sleeve pipe (223), each sleeve pipe comprise outer tube (224) and are set in the interior pipe (225) in the outer tube to have circumferential weld between the said inner and outer pipe, are provided with spacing column (226) between said interior pipe (225) and the outer tube (224); The upper end of pipe is communicated with said water-inlet header in said, the lower ending opening of said interior pipe, and be positioned at outer tube; The upper end of said outer tube goes out water manifold and is communicated with the lower end closed of said outer tube with said.

11. waste heat recovery according to claim 10 and bag-type dust removal system is characterized in that, said water-inlet header (221) is set in out the inside of water manifold (222), has the gap between the said water-in and water-out header; Be provided with reference column between the said water-in and water-out header; Perhaps, said water-inlet header (221) and to go out water manifold (222) separate.

12. waste heat recovery according to claim 10 and bag-type dust removal system; It is characterized in that; Said water-inlet header (221) and go out water manifold (222) and be respectively the inside that laterally is plugged in said flue (21), said sleeve pipe (223) longitudinally is positioned at said flue; Perhaps, said water-inlet header (221) and go out the outside that water manifold (222) is arranged in said flue (21), said sleeve pipe (223) laterally or obliquely is positioned at said flue.

13. waste heat recovery according to claim 9 and bag-type dust removal system is characterized in that, said header type double-tube heat exchanger (23) up and down comprising:

Upper header (231), it laterally is plugged on the said flue (21), and at least one end of said upper header (231) is the heat-eliminating medium outlet;

Lower collecting box (232), it is arranged at the below of said upper header abreast, and laterally is plugged on the said flue (21), and at least one end of said lower collecting box (232) is the heat-eliminating medium inlet;

A plurality of sleeve pipes (233); It longitudinally is positioned at said flue (21); And be connected between the said upper and lower header, each said sleeve pipe comprises inside and outside sheathed interior pipe (234) and outer tube (235) with one heart, has the but circumferential weld of medium circulation of cooling between the said inner and outer pipe; Said upper and lower header is interconnected through outer tube, and said interior pipe is perforation setting;

The upper end of each said outer tube (235) is fixedly connected with the medial surface of said upper header (231), and the lower end is fixedly connected with the medial surface of said lower collecting box (232); The two ends of pipe (234) were fixedly connected with the outer side of said upper and lower header respectively in each was said.

14. waste heat recovery according to claim 8 and bag-type dust removal system is characterized in that, said converter gas sack cleaner (4) comprises cylindrical shell (41), has inlet mouth (412) and venting port (413) on the said cylindrical shell; Be provided with filter bag lattice board (421) and a plurality of said filter bag (42) in the said cylindrical shell, a plurality of filter bags laterally hang on the filter bag lattice board respectively abreast; Said cylindrical shell is vertical and cylindrical, and it is conical that the top of cylindrical shell is, and the bottom of cylindrical shell is circular-arc;

The central interior of said cylindrical shell (41) is provided with sedimentation pipe (411), and said sedimentation pipe passes from said filter bag (42), and its inlet is said inlet mouth (412) and the top that is positioned at cylindrical shell, and its outlet is positioned at the below of the inside of cylindrical shell; Said venting port (413) is positioned at the conical top of cylindrical shell;

The bottom of said sedimentation pipe (411) is provided with airflow-distribution board (4111), and it is positioned at the below of said filter bag (42); The internal diameter of said airflow-distribution board and said cylindrical shell adapts, and its central authorities are provided with the centre hole that a caliber with said sedimentation pipe (411) is complementary, and is provided with a plurality of communicating poress around the centre hole.

15. waste heat recovery according to claim 14 and bag-type dust removal system; It is characterized in that; The top of said filter bag (42) is provided with deashing device; Said deashing device comprises two cover pulse blowing component (43), and it is installed in the top of said filter bag symmetrically, and lays respectively at said cylindrical shell (41) both sides;

The said pulse blowing component of every cover (43) comprises laterally a plurality of and is installed on the winding-up pipe (431) of said cylindrical shell abreast; The below of each winding-up pipe is provided with a plurality of nozzles (432); The outer end of winding-up pipe is connected with gas bag (433) and controls the control piece (434) that the interior gas of gas bag periodically gets into the winding-up pipe, and said gas bag and control piece all are positioned at outside the cylindrical shell; The bottom of said cylindrical shell (41) is provided with ash-unloading slot (45), and the bottom of said cylindrical shell also is provided with above said ash-unloading slot and scrapes apparatus for ash (451); Said ash-unloading slot directly is connected with defeated grey equipment; The upper conical portion of said cylindrical shell is provided with a plurality of self-closing gas safety explosion venting valves.

16. waste heat recovery according to claim 8 and bag-type dust removal system is characterized in that, said radial pattern evaporated flue (1) corner, top is provided with curtain wall pushing off the slag pipe (11);

Said flue gas reclaims tapping equipment (5) and comprises switching station (51), and said switching station one side links to each other with said converter gas sack cleaner (4) through said blower fan (6), and opposite side is connected with gas chamber (53) with chimney (52) respectively.

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