CN209672286U - Electric furnace flue gas recovery waste heat boiler - Google Patents

Abstract

The utility model discloses a kind of electric furnace flue gas recovery waste heat boiler, the gas outlet of the watercooling elbow on the air inlet and electric furnace of the bend pipe flue being fixedly installed on bracket is oppositely arranged, and there are gaps between the air inlet of bend pipe flue and the gas outlet of watercooling elbow；It is equipped with the water cooling sliding sleeve with sliding machine in the air inlet section movable sleeve of bend pipe flue, is fixedly installed sliding rail on bracket corresponding with sliding machine, sliding machine is movably set on sliding rail, and sliding machine is driven by driving device；The gas outlet of bend pipe flue successively be connected to the sealing of the air inlet of combustion settling chamber, evaporated flue, waste-heat recovery device, the gas outlet of waste-heat recovery device, the gas outlet of electric furnace seal closure, electric furnace roof dust excluding hood gas outlet collected by pipeline and be connected afterwards with deduster, blower.Above structure can reduce the consumption of electric energy and water when carrying out cooling treatment to high-temperature dust-containing flue gas but also recycle the heat in high-temperature dust-containing flue gas, greatly reduce cost.

Description

Electric furnace flue gas recovery waste heat boiler

Technical field

The utility model relates to boiler plant technical field more particularly to a kind of electric furnace flue gas recovery waste heat boilers.

Background technique

Electric furnace can generate a large amount of high-temperature dust-containing flue gas in steelmaking process, and the temperature of high-temperature dust-containing flue gas is up to 1000 ~ 1400 DEG C, obvious heat of smoke accounts for 10% or more of electric furnace steel making total energy consumption.The high-temperature dust-containing flue gas generated in electric furnace is by being set to electricity Outside watercooling elbow discharge electric furnace at the smoke outlet of furnace, the domestic processing to the high-temperature dust-containing flue gas being discharged from watercooling elbow at present Mode is to be carried out cooling processing to it using water-cooling pattern, be then discharged into atmosphere.But it can be consumed largely using water-cooling pattern Electric energy and water, and the heat in a large amount of high-temperature dust-containing flue gas is not recycled.

Utility model content

The technical issues of solving needed for the utility model is: a kind of good cooling results are provided, and to high-temperature dust-containing flue gas into The consumption of electric energy and water can be reduced when row cooling treatment but also recycles the electric furnace flue gas recycling of the heat in high-temperature dust-containing flue gas Waste heat boiler.

To solve the above problems, the technical solution adopted in the utility model is: the electric furnace flue gas recovery waste heat boiler, Watercooling elbow, enclosed electric furnace hood and electric furnace roof dust excluding hood, the air inlet of watercooling elbow and the row of electric furnace are provided on electric furnace Mouth is tightly connected, and the gas outlet seal of watercooling elbow stretches out outside enclosed electric furnace hood after passing through the through-hole on enclosed electric furnace hood；In It is provided with bracket outside electric furnace, bend pipe flue is fixedly installed on bracket, the air inlet of bend pipe flue and the gas outlet of watercooling elbow It is oppositely arranged, and there are gaps between the air inlet of bend pipe flue and the gas outlet of watercooling elbow；In the air inlet of bend pipe flue Section movable sleeve is equipped with water cooling sliding sleeve, sliding machine is fixedly installed on water cooling sliding sleeve, in bracket corresponding with sliding machine On be fixedly installed sliding rail, sliding machine is movably set on sliding rail, and sliding machine is driven by driving device, is being driven Under the driving of dynamic device, sliding machine moves on sliding rail, drives water cooling sliding sleeve along bend pipe flue to close to watercooling elbow The sliding of gas outlet direction or slided to the gas outlet direction far from watercooling elbow, and the mistake that water cooling sliding sleeve is slided along bend pipe flue Water cooling sliding sleeve is without departing from bend pipe flue in journey；The gas outlet of bend pipe flue is connected to the sealing of the air inlet of combustion settling chamber, is fired The air inlet sealing for burning gas outlet and the evaporated flue of expansion chamber is connected to, the gas outlet of evaporated flue and waste-heat recovery device into Port sealing connection, the gas outlet of waste-heat recovery device, the gas outlet of electric furnace seal closure, the gas outlet of electric furnace roof dust excluding hood are logical It crosses pipeline and collects and be connected afterwards with the air inlet of deduster, be provided with blower at the gas outlet of deduster；If evaporated flue by Dry segmentation evaporated flue sealing is spliced to form, and each evaporated flue that is segmented is by the first import header, several first heat pipes and the One outlet header is constituted, and the water outlet of oxygen-eliminating device is connected with the water inlet of drum, and the water outlet of drum passes through forced circulation pump Be connected with the first import header of each segmentation evaporated flue, each first outlet header for being segmented evaporated flue by tedge with The water inlet of drum is connected, and the steam (vapor) outlet of drum is connected with storage heater.

Further, electric furnace flue gas recovery waste heat boiler above-mentioned, wherein the structure of water cooling sliding sleeve includes: by cooling tube Winding forms middle part as tube-to-tube construction, the second import header and the second outlet header of connection through-hole, connects the hole wall of through-hole Profile is matched with the outer profile of the air inlet section of bend pipe flue, and the gap in tube-to-tube construction between adjacent cooling tube is welded by round steel Filling；Under the drive of the drive, after water cooling sliding sleeve is slided along bend pipe flue to the gas outlet direction close to watercooling elbow, water Minimum clearance distance H between cold sliding sleeve and the gas outlet of watercooling elbow is 50 ± 10 ㎜.

Further, electric furnace flue gas recovery waste heat boiler above-mentioned, wherein bend pipe flue is by the upper of film water cold wall structure The sealing of the lower section flue of section flue and film water cold wall structure is spliced to form, and lower section flue is fixedly installed on branch by hold-down support On frame；It is fixedly installed sliding part on upper section flue, is fixedly installed sliding support on bracket corresponding with sliding part, Upper section flue is movably set on sliding support by sliding part.Here bend pipe flue uses low force circular flow mode.

Further, electric furnace flue gas recovery waste heat boiler above-mentioned, wherein each upper heat pipe and lower section in upper section flue Each lower heat pipe in flue is double back journey loop structure；The explosion-proof manhole of gravity type is additionally provided on lower section flue.

Further, electric furnace flue gas recovery waste heat boiler above-mentioned, wherein upper section flue is by upper linkage section flue and inclination The upper tilting section flue being arranged is integrally formed, and water cooling sliding sleeve is movably set in the air inlet section of linkage section flue, upper being located at Baffle upper plate is provided in each upper heat pipe of tilting section flue abdomen, upper tilting section flue abdomen is by upper tilting section flue The region that bottom bus bar is covered to two sides symmetric extension to the angle α between the expansion bus of two sides by 120 ° of angles；Lower section cigarette Road is integrally formed by the lower tilting section flue being obliquely installed and lower linkage section flue, the gas outlet of upper tilting section flue and lower inclination The air inlet of section flue seals connection, and the gas outlet of lower linkage section flue is connected to the sealing of the air inlet of combustion settling chamber；In place Chin spoiler is provided in each lower heat pipe of lower tilting section flue abdomen, lower tilting section flue abdomen is by lower tilting section The region that stack base bus is covered to two sides symmetric extension to the angle β between the expansion bus of two sides by 120 ° of angles.

Further, electric furnace flue gas recovery waste heat boiler above-mentioned, wherein be provided in combustion settling chamber surrounding by keeping the temperature Brick insulation furnace wall；The water cold plate of film water cold wall structure is covered at the top of combustion settling chamber, the air inlet of combustion settling chamber Mouth is set on water cold plate, and water cold plate uses low force circular flow mode.The water cold plate is by several segmentations Water cold plate constitute, be fixedly installed angle steel respectively on each sectioned water cooling siding, by fastener will two-by-two adjacent angle steel it is close Envelope connection is to be spliced to form a complete water cold plate for the sealing of each sectioned water cooling siding.

Further, electric furnace flue gas recovery waste heat boiler above-mentioned, wherein opened up respectively on the joint face of each angle steel There is oblong through-hole, is additionally provided with gasket seal in the gap between the joint face of adjacent angle steel two-by-two, is worn by fastener It crosses in adjacent angle steel two-by-two and corresponds to oblong through-hole, to which the sealing of each sectioned water cooling siding is spliced to form a complete water cooling Siding.

Further, electric furnace flue gas recovery waste heat boiler above-mentioned, wherein evaporated flue is close by three sections of segmentation evaporated flues Envelope is spliced to form, and each first heat pipe in every section of segmentation evaporated flue is three return cycle structures.

The beneficial effects of the utility model are: safe and reliable to operation, good cooling results, long service life, and high temperature is contained Cloud of dust gas can reduce the consumption of electric energy and water when cooling treatment but also recycle the heat in high-temperature dust-containing flue gas, significantly It reduces costs.

Detailed description of the invention

Fig. 1 is the flowage structure schematic diagram of electric furnace flue gas recovery waste heat boiler described in the utility model.

Fig. 2 is the structural schematic diagram of watercooling elbow and bend pipe flue in Fig. 1.

Fig. 3 is the configuration schematic diagram of bend pipe flue in Fig. 2.

Fig. 4 is the structural schematic diagram for the water cooling sliding sleeve being sheathed on bend pipe flue in Fig. 2 left view direction.

Fig. 5 is the structural schematic diagram that each upper and lower heat pipe is double back journey loop structure in bend pipe flue.

Fig. 6 is the structural schematic diagram of tilting section flue in A-A section view direction in Fig. 2.

Fig. 7 is the structural schematic diagram of tilting section flue under B-B section view direction in Fig. 2.

Fig. 8 is the structural schematic diagram of the baffle upper plate in each upper heat pipe of upper tilting section flue abdomen.

Fig. 9 is the structural schematic diagram of combustion settling chamber overlook direction in Fig. 1.

Figure 10 is the attachment structure schematic diagram of two sections of sectioned water cooling sidings.

Figure 11 is the connection schematic diagram in Figure 10 left view direction.

Figure 12 is the structural schematic diagram of evaporated flue in Fig. 1.

Specific embodiment

With reference to the accompanying drawing and preferred embodiment is described in further detail technical solution described in the utility model.

As shown in Figure 1, being provided with watercooling elbow 11, enclosed electric furnace hood 12 and electric furnace roof dust excluding hood 13, water on electric furnace 1 The air inlet of clod wash head 11 and the smoke outlet of electric furnace 1 are tightly connected, and the gas outlet seal of watercooling elbow 11 passes through enclosed electric furnace hood It is stretched out outside enclosed electric furnace hood 12 after through-hole on 12, the high-temperature dust-containing flue gas that generates in electric furnace 1 is by being set to the smoke evacuation of electric furnace 1 Watercooling elbow 11 at mouthful is discharged outside electric furnace 1.The structure of electric furnace flue gas recovery waste heat boiler described in the present embodiment are as follows: in electric furnace Bracket is provided with outside 1, bend pipe flue 2 is fixedly installed on bracket, and 2 section of bend pipe flue is long round section, and the 2 of bend pipe flue The gas outlet of air inlet and watercooling elbow 1 is oppositely arranged, and between the air inlet of bend pipe flue 2 and the gas outlet of watercooling elbow 1 There are gaps.It is equipped with water cooling sliding sleeve 3 in the air inlet section movable sleeve of bend pipe flue 2, sliding is fixedly installed on water cooling sliding sleeve 3 Trolley 31, is fixedly installed sliding rail 32 on bracket 1 corresponding with sliding machine 31, and sliding machine 31 is movably set in On sliding rail 32, sliding machine 31 is driven by driving device, and under the drive of the drive, sliding machine 31 is in sliding rail It moved on 32, drive water cooling sliding sleeve 3 along bend pipe flue 2 to close to the sliding of the gas outlet direction of watercooling elbow 1 or to far from water cooling The gas outlet direction of elbow 1 is slided, and water cooling sliding sleeve 3 along bend pipe flue 2 slide during water cooling sliding sleeve 3 without departing from bend pipe Flue 2.Driving device can be driven using hydraulic system, other forms can also be used, as long as 31 edge of sliding machine can be driven Sliding rail 32 moves.The setting of above structure can guarantee that water cooling sliding sleeve 3 is smoothly slided along bend pipe flue 2.Bend pipe cigarette The gas outlet in road 2 is connected to the sealing of the air inlet of combustion settling chamber 4, the gas outlet of combustion settling chamber 4 and the air inlet of evaporated flue 5 54 sealing connection of mouth, the gas outlet 55 of evaporated flue 5 are connected to the sealing of the air inlet of waste-heat recovery device 6, waste-heat recovery device 6 Gas outlet, the gas outlet 120 of electric furnace seal closure, electric furnace roof dust excluding hood gas outlet 130 collected by pipeline 10 after with remove The air inlet of dirt device 7 is connected, and blower 8 is provided at the gas outlet of deduster 7.For convenience of subsequent clean flue gas discharge with And the collection of flue dust, the gas outlet of deduster 7 are connected by blower 8 with chimney 81, the cinder-discharging port of deduster 7 with unload ash hopper 71 are connected.

As shown in Figure 1, Figure 2 and Figure 4, the structure of the water cooling sliding sleeve 3 in the present embodiment includes: by the winding of cooling tube 35, shape It is tube-to-tube construction, the second import header 33 and the second outlet header 34 for connecting through-hole at middle part, it is adjacent in tube-to-tube construction Gap between cooling tube 35 is welded by round steel fills.Under the drive of the drive, water cooling sliding sleeve 3 is along bend pipe flue 2 to close After the gas outlet direction sliding of watercooling elbow 11, the minimum clearance distance H between water cooling sliding sleeve 3 and the gas outlet of watercooling elbow 11 For 50 ± 10 ㎜.The setting guarantee of minimum clearance distance H has the outer air of a certain amount of furnace sliding by watercooling elbow 11 and water cooling Gap between set 3 enters in bend pipe flue 2, guarantees that high-temperature dust-containing flue gas enters the combustion coefficient of bend pipe flue 2, high temperature is contained The gas fuel burnings such as the CO in cloud of dust gas fall.

As shown in Figure 1, Figure 2 and Figure 3, bend pipe flue described in the present embodiment 2 by film water cold wall structure upper section cigarette The sealing of the lower section flue 22 of road 21 and film water cold wall structure is spliced to form, and lower section flue logical 22 is crossed hold-down support 20 and is fixedly installed In on bracket.Sliding part 213 is fixedly installed on upper section flue 21, fixation is set on bracket corresponding with sliding part 213 It is equipped with sliding support 214, upper section flue logical 21 is crossed sliding part 213 and is movably set on sliding support 214.214 He of sliding support The setting of sliding part 213 expands with heat and contract with cold for bend pipe flue 2 in actual moving process and provides bit shift compensation.Here bend pipe flue 2 is adopted With low force circular flow mode.

Upper section flue 21 generally by upper water inlet header 211, each upper heat pipe 210, above go out vapour header 212 constitute, lower section cigarette Road 22 generally by lower water inlet header 221, each lower heat pipe 220, down go out vapour header 222 constitute.As shown in figure 5, upper section flue 21 In each upper heat pipe 210 and lower section flue 22 in each lower heat pipe 220 be double back journey loop structure.Under preventing from entering Flue-gas temperature in section flue 22 is too low and generates cold quick-fried phenomenon, and the explosion-proof manhole of gravity type is additionally provided on lower section flue 22 223。

As shown in Fig. 3, Fig. 6, Fig. 7 and Fig. 8, wherein upper section flue 22 is by upper linkage section flue 23 and is obliquely installed upper Tilting section flue 24 is integrally formed, and water cooling sliding sleeve 3 is movably set in the air inlet section of linkage section flue 23, to prevent upper inclination There is separation of two phenomenon in each upper heat pipe 210 in section flue abdomen 240, is being located at the oblique section flue abdomen 240 of updip Baffle upper plate 215 is provided in each upper heat pipe 210, baffle upper plate 215 is spiral plate structure, upper tilting section flue abdomen 240 is from upper tilting section stack base bus to two sides symmetric extension to the angle α between the expansion bus of two sides are 120 ° of angles The region covered.Lower section flue 22 is integrally formed by the lower tilting section flue 25 being obliquely installed and lower linkage section flue 26, on The air inlet sealing of the gas outlet of tilting section flue 25 and lower tilting section flue 24 be connected to, the gas outlet of lower linkage section flue 26 and The air inlet of combustion settling chamber 4 seals connection.To prevent from occurring in each lower heat pipe 220 in lower tilting section flue abdomen 250 Separation of two phenomenon, be located at have a down dip oblique section flue abdomen 250 each lower heat pipe 220 in be provided with chin spoiler, under lead Flowing plate is spiral plate structure, and the structure of chin spoiler can be found in the structure of baffle upper plate 215 shown in Fig. 8, and the two structure is identical. Lower tilting section flue abdomen 250 is from lower tilting section stack base bus to two sides symmetric extension between the expansion bus of two sides The region that angle β is covered by 120 ° of angles.

As shown in Fig. 1, Fig. 9 and Figure 10, it is provided in 4 surrounding of combustion settling chamber by keeping the temperature brick insulation furnace wall 41, film The water cold plate 42 of formula water wall structure is covered in 4 top of combustion settling chamber, and the air inlet of combustion settling chamber 4 is set to water-cooling wall On plate 42, water cold plate 42 uses low force circular flow mode.The water cold plate 42 is by several sectioned water cooling sidings 421 are constituted, and are fixedly installed angle steel 43 respectively on each sectioned water cooling siding 421, will adjacent angle steel two-by-two by fastener 44 43 are tightly connected each sectioned water cooling siding 421 sealing being spliced to form a complete water cold plate 42.

To guarantee that each sectioned water cooling siding 421 is preferably spliced into a complete water cold plate 42, such as Figure 10 and Figure 11 It is shown, offer oblong through-hole 431 respectively on the joint face of each angle steel 43, adjacent angle steel 43 two-by-two joint face it Between gap in be additionally provided with gasket seal 45, passed through by fastener 44 and correspond to oblong through-hole in adjacent angle steel 43 two-by-two 431, to which each section of sealing of point water cold plate 421 is preferably spliced to form a complete water cold plate 42.Combustion settling chamber 4 Setting, can further by gas fuel burnings such as CO in high-temperature dust-containing flue gas totally.

As shown in figs. 1 and 12, evaporated flue 5 is spliced to form by the sealing of several segmentation evaporated flues 51, every section of segmentation vapour Change flue 51 to be made of the first import header 52, several first heat pipes and first outlet header 53, be vaporized in the present embodiment Flue 5 is spliced to form by three sections of segmentation evaporated flue 51 sealings, and each first heat pipe in every section of segmentation evaporated flue 51 is Three return cycle structures.Every section of segmentation evaporated flue 51 is all made of middle pressure endless form, the water outlet and drum of oxygen-eliminating device Water inlet be connected, the water outlet of drum passes through forced circulation pump and each 52 phase of the first import header for being segmented evaporated flue 51 Connection, each first outlet header 53 for being segmented evaporated flue 51 are connected by tedge with the water inlet of drum, the steaming of drum Vapor outlet is connected with storage heater.When operation, the water come out from oxygen-eliminating device enters drum, passes through middle pressure forced circulation pump by drum Enter in each first heat pipe after being segmented into each section in the first import header 52 of evaporated flue 51, is located at each first heat pipe In water enter corresponding second outlet header 53 after by thermal evaporation, then enter drum through tedge, the separator through drum Steam-water separation is carried out, the steam of generation accesses after storage heater through each outer net for needed for producing and living.The structure of evaporated flue is set It sets, first is that guaranteeing that the water entered in each first heat pipe is fully cooled, solves the flue dust in high-temperature dust-containing flue gas to electric furnace cigarette The baneful influence of gas recovery waste heat boiler；Second is that increasing the temperature gradient of recirculated water, it is fully cooled high-temperature dust-containing flue gas, and Steam is sufficiently recycled, energy conservation and environmental protection is greatly saved operating cost, improves the thermal efficiency.

Before electric furnace flue gas recovery waste heat boiler operatiopn, first make water cooling sliding sleeve 3 along bend pipe flue 2 to close to watercooling elbow 11 It is 50 ± 10 ㎜ that gas outlet direction, which slides into the minimum clearance distance H between water cooling sliding sleeve 3 and the gas outlet of watercooling elbow 11, so After start to make steel.The high-temperature dust-containing flue gas generated in steelmaking process blower 8 and other factors effect under by watercooling elbow 11, Water cooling sliding sleeve 3 enters in bend pipe flue 2, enter at this time fuel gas such as CO in the high-temperature dust-containing flue gas in bend pipe flue 2 with Air mixes, burns outside the furnace entered by the gap between water cooling sliding sleeve 3 and the gas outlet of watercooling elbow 11, by high temperature dust The gas fuel burnings such as the CO in flue gas fall.High-temperature dust-containing flue gas into all burnt of bend pipe flue 2 is heavy through burning The ash-laden gas that formation temperature is about 250 DEG C after drop room 4, evaporated flue 5, waste-heat recovery device 6 cool down, temperature is about 250 DEG C Ash-laden gas formed with the exhaust gas hybrid cooling in the gas outlet of circuit sealing cover 12, the gas outlet of circuit removing roof dust cover 13 Mix waste gas, the temperature of mix waste gas is lower than 130 DEG C at this time, and mix waste gas, which meets discharge by formation after 8 dedusting of deduster, to be wanted The clean flue gas asked.

The above is only the preferred embodiment of the utility model, is not to make any other form to the utility model Limitation, and according to any modification or equivalent variations made by the technical essence of the utility model, still fall within the requires of the utility model The range of protection.

The utility model has the advantages that: safe and reliable to operation, good cooling results, long service life, and to high temperature dust cigarette Gas can reduce the consumption of electric energy and water when cooling treatment but also recycle the heat in high-temperature dust-containing flue gas, substantially reduces Cost.

Claims (8)

1. electric furnace flue gas recovery waste heat boiler is provided with watercooling elbow, enclosed electric furnace hood and electric furnace roof dust excluding hood on electric furnace, The air inlet of watercooling elbow and the smoke outlet of electric furnace are tightly connected, and the gas outlet seal of watercooling elbow passes through on enclosed electric furnace hood It is stretched out outside enclosed electric furnace hood after through-hole；It is characterized by: being provided with bracket outside electric furnace, bend pipe flue is fixedly installed on bracket On, the air inlet of bend pipe flue and the gas outlet of watercooling elbow are oppositely arranged, and the air inlet of bend pipe flue and watercooling elbow There are gaps between gas outlet；It is equipped with water cooling sliding sleeve in the air inlet section movable sleeve of bend pipe flue, fixation is set on water cooling sliding sleeve It is equipped with sliding machine, is fixedly installed sliding rail on bracket corresponding with sliding machine, sliding machine is movably set in On sliding rail, sliding machine is driven by driving device, and under the drive of the drive, sliding machine is transported on sliding rail Dynamic, drive water cooling sliding sleeve is along gas outlet direction sliding of the bend pipe flue to close watercooling elbow or the outlet to separate watercooling elbow The sliding of mouthful direction, and water cooling sliding sleeve along bend pipe flue slide during water cooling sliding sleeve without departing from bend pipe flue；Bend pipe flue The air inlet sealing of gas outlet and combustion settling chamber be connected to, the gas outlet of combustion settling chamber and the air inlet sealing of evaporated flue The gas outlet of connection, evaporated flue is connected to the sealing of the air inlet of waste-heat recovery device, the gas outlet of waste-heat recovery device, electric furnace The gas outlet of seal closure, the gas outlet of electric furnace roof dust excluding hood are collected by pipeline and are connected afterwards with the air inlet of deduster, In Blower is provided at the gas outlet of deduster；Evaporated flue is spliced to form by the sealing of several segmentation evaporated flues, each segmentation vaporization Flue is made of the first import header, several first heat pipes and first outlet header, the water outlet of oxygen-eliminating device and drum Water inlet is connected, and the water outlet of drum is connected by forced circulation pump with the first import header of each segmentation evaporated flue, The first outlet header of each segmentation evaporated flue is connected by tedge with the water inlet of drum, the steam (vapor) outlet and storage of drum Hot device is connected.

2. electric furnace flue gas recovery waste heat boiler according to claim 1, it is characterised in that: the structure of water cooling sliding sleeve includes: By cooling tube winding, middle part is formed as tube-to-tube construction, the second import header and the second outlet header of connection through-hole, and connection is logical The outer profile of the air inlet section of the hole wall profile and bend pipe flue in hole matches, the gap in tube-to-tube construction between adjacent cooling tube by Round steel welding filling；Under the drive of the drive, water cooling sliding sleeve is along bend pipe flue to the gas outlet direction close to watercooling elbow After sliding, the minimum clearance distance H between water cooling sliding sleeve and the gas outlet of watercooling elbow is 50 ± 10 ㎜.

3. electric furnace flue gas recovery waste heat boiler according to claim 1, it is characterised in that: bend pipe flue is by fin panel casing The lower section flue sealing of the upper section flue and film water cold wall structure of structure is spliced to form, and lower section flue is fixed by hold-down support It is set on bracket；It is fixedly installed sliding part on upper section flue, is fixedly installed on bracket corresponding with sliding part Sliding support, upper section flue are movably set on sliding support by sliding part.

4. electric furnace flue gas recovery waste heat boiler according to claim 3, it is characterised in that: each heated in upper section flue Each lower heat pipe in pipe and lower section flue is double back journey loop structure；The explosion-proof people of gravity type is additionally provided on lower section flue Hole.

5. electric furnace flue gas recovery waste heat boiler according to claim 3 or 4, it is characterised in that: upper section flue is by upper connection Section flue and the upper tilting section flue being obliquely installed are integrally formed, and water cooling sliding sleeve is movably set in the air inlet of linkage section flue Section is provided with baffle upper plate in each upper heat pipe for being located at the oblique section flue abdomen of updip, and upper tilting section flue abdomen is served as reasons What upper tilting section stack base bus was covered to two sides symmetric extension to the angle α between the expansion bus of two sides by 120 ° of angles Region；Lower section flue is integrally formed by the lower tilting section flue being obliquely installed and lower linkage section flue, and upper tilting section flue goes out Port is connected to the sealing of the air inlet of lower tilting section flue, and the gas outlet of lower linkage section flue and the air inlet of combustion settling chamber are close Envelope connection；Chin spoiler, lower tilting section flue abdomen are provided in being located at each lower heat pipe for having a down dip oblique section flue abdomen To be covered from lower tilting section stack base bus to two sides symmetric extension to the angle β between the expansion bus of two sides by 120 ° of angles The region of lid.

6. electric furnace flue gas recovery waste heat boiler according to claim 1, it is characterised in that: be arranged in combustion settling chamber surrounding Have by keeping the temperature brick insulation furnace wall；The water cold plate of film water cold wall structure is covered at the top of combustion settling chamber, burning sedimentation The air inlet of room is set on water cold plate；The water cold plate is made of several sectioned water cooling sidings, in each sectioned water cooling Angle steel is fixedly installed on siding respectively, adjacent angle steel will be tightly connected two-by-two thus by each sectioned water cooling siding by fastener Sealing is spliced to form a complete water cold plate.

7. electric furnace flue gas recovery waste heat boiler according to claim 6, it is characterised in that: on the joint face of each angle steel Oblong through-hole is offered respectively, is additionally provided with gasket seal in the gap between the joint face of adjacent angle steel two-by-two, is passed through Fastener pass through correspond in adjacent angle steel two-by-two oblong through-hole, to each sectioned water cooling siding is sealed be spliced to form one it is complete Whole water cold plate.

8. according to claim 1, electric furnace flue gas recovery waste heat boiler described in 2,3 or 6, it is characterised in that: evaporated flue is by three Section segmentation evaporated flue sealing is spliced to form, and each first heat pipe in every section of segmentation evaporated flue is three return cycle knots Structure.