CN111961799B - Converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device and method - Google Patents
Converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device and method Download PDFInfo
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- CN111961799B CN111961799B CN202010874353.XA CN202010874353A CN111961799B CN 111961799 B CN111961799 B CN 111961799B CN 202010874353 A CN202010874353 A CN 202010874353A CN 111961799 B CN111961799 B CN 111961799B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/06—Energy from waste gas used in other processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device and a method, and belongs to the technical field of converter flue gas waste heat boilers. The technical scheme is as follows: the multistage heat exchange unit is formed by splicing an A-type heat exchange unit (5), a B-type heat exchange unit and a C-type heat exchange unit (9) which are sequentially arranged from top to bottom, one ends of a steam hot water pipe (4) and a softened water pipe (18) of the heat exchange unit are respectively connected with a water inlet and a water outlet of a steam drum (14), and the other ends of the steam hot water pipe (4) and the softened water pipe (18) of the heat exchange unit are respectively connected with the multistage heat exchange unit. The invention has the beneficial effects that: the whole process does not spray water, so that the total recovery amount of the converter flue gas is increased, and the energy is saved and the environment is protected; the fan has the advantages of reasonable structure, convenience in maintenance, synchronous heat recovery, high efficiency, reduction of electric quantity of the fan, maintenance and repair, and manpower and material resource saving.
Description
Technical Field
The invention relates to a converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device and a method, and belongs to the technical field of converter flue gas waste heat boilers.
Background
The converter flue gas is characterized in that: high temperature, high dust, high C0, and continuous production. At present, converter flue gas is cooled from 1000-800 ℃ to about 170-200 ℃, a water spraying and atomizing converter high-temperature flue gas treatment process (the temperature is between 1000-. The invention has the following patent: a waste heat boiler (ZL 201621034214.1) for recovering the waste heat of high-temperature flue gas of a converter and a high-temperature and high-efficiency heat exchanger (ZL 201921488761.0) adopt a cooling process without water spraying, but a cyclone dust collector is required to be additionally arranged at the same time, and because the site and the space of a steel converter are very limited, the waste heat boiler and the cyclone dust collector are difficult to be simultaneously arranged. In summary, the prior art has the following problems: the equipment structure is complex, the installation and the maintenance are inconvenient, and the heat efficiency is low; once a fault occurs, the maintenance period is long, the continuous casting production of the converter is directly influenced, and the economic loss caused by the fault is large.
Disclosure of Invention
The invention aims to provide a converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device and a method, water is not sprayed in the whole process, the total recovery amount of the converter flue gas is increased, and the energy conservation and the environmental protection are realized; the fan has the advantages of reasonable structure, convenience in maintenance, synchronous heat recovery, high efficiency, reduction in electric quantity of the fan, maintenance, manpower and material resources conservation, and capability of solving the problems in the background art.
The technical scheme of the invention is as follows:
a converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device comprises a converter flue gas high-temperature inlet, a converter flue gas low-temperature outlet, a cylindrical furnace body, a steel frame, a multi-section heat exchange unit, a heat exchange unit steam hot water pipe, a softened water pipe and a steam drum; the cylindrical furnace body is internally provided with a plurality of sections of heat exchange units, the plurality of sections of heat exchange units are formed by splicing an A-type heat exchange unit, a B-type heat exchange unit and a C-type heat exchange unit which are sequentially arranged from top to bottom, the heat exchange tubes of the A-type heat exchange unit are a plurality of layers of disk-shaped tube bundles, the disk-shaped tube bundles are wound and arranged into a layer of disk-shaped tube bundles on one plane, and the disk-shaped tube bundles are arranged in the cylindrical furnace body in parallel; the heat exchange tubes of the B-type heat exchange unit are double-tube snake-shaped tube bundles connected end to end, the two heat exchange tubes are arranged together and are arranged in a snake-shaped coil in the cylindrical furnace body to form a multilayer double-tube snake-shaped tube bundle; the heat exchange tubes of the C-shaped heat exchange unit are single tube serpentine tube bundles, and one heat exchange tube is coiled in a serpentine manner in the cylindrical furnace body to form a plurality of layers of single tube serpentine tube bundles; a steel frame is arranged outside the cylindrical furnace body, a steam hot water pipe and a softened water pipe of the heat exchange unit are arranged on the steel frame, one end of the steam hot water pipe and one end of the softened water pipe of the heat exchange unit are respectively connected with a water inlet and a water outlet of the steam drum, and the other end of the steam hot water pipe and the other end of the softened water pipe of the heat exchange unit respectively enter the cylindrical furnace body to be connected with the multi-section heat exchange unit; the A-type heat exchange unit and the B-type heat exchange unit are connected in parallel and then connected in series with the C-type heat exchange unit, the water inlet of the C-type heat exchange unit is connected with a softened water pipe, and the water outlet of the A-type heat exchange unit and the B-type heat exchange unit which are connected in parallel is connected with a steam hot water pipe of the heat exchange unit; the cylindrical furnace body is provided with a converter flue gas high-temperature inlet and a converter flue gas low-temperature outlet, and the converter high-temperature flue gas rises from the bottom of the cylindrical furnace body, passes through the C-type heat exchange unit, the B-type heat exchange unit and the A-type heat exchange unit in sequence for heat exchange, and is discharged through the converter flue gas low-temperature outlet.
The number of the B-type heat exchange units is three, and the B-type heat exchange units are respectively a first B-type heat exchange unit, a second B-type heat exchange unit and a third B-type heat exchange unit, and the first B-type heat exchange unit, the second B-type heat exchange unit and the third B-type heat exchange unit are mutually arranged in parallel; the inlets of the first B-type heat exchange unit, the second B-type heat exchange unit and the third B-type heat exchange unit are connected with the outlet of the C-type heat exchange unit, and the outlets of the first B-type heat exchange unit, the second B-type heat exchange unit and the third B-type heat exchange unit are connected with the steam hot water pipe of the heat exchange unit.
A type heat exchange unit, B type heat exchange unit I, B type heat exchange unit II, B type heat exchange unit III and C type heat exchange unit of multistage heat exchange unit are the modularization heat exchange unit of independent arrangement, and at the operation in-process, if a certain unit breaks down or damages, can demolish the change alone, the maintenance of being convenient for.
The section of the B-type heat exchange unit is formed by staggered arrangement, namely staggered arrangement and staggered arrangement of two adjacent layers of heat exchange tubes; the cross section of the C-shaped heat exchange unit is formed by arranging two adjacent layers of heat exchange tubes in a row, namely, arranging the heat exchange tubes in rows from top to bottom.
The bottom of the cylindrical furnace body is provided with an ash bin and an ash cleaning device, the device comprises a shot blasting steel shot grating, a shot blasting dragon, an ash bin vibrator, an ash cleaning elevator and a steel shot ash cleaning top bin, the shot blasting steel shot grating is arranged in the ash bin, the ash bin above the shot blasting steel shot grating is connected with a shot blasting dragon, and the ash bin below the shot blasting steel shot grating is provided with an ash bin vibrator; the shot blasting auger is connected with a steel shot dust removal top bin arranged at the top of the cylindrical furnace body through a dust removal elevator.
The A-type heat exchange unit, the B-type heat exchange unit and the C-type heat exchange unit are respectively provided with a softened water inlet header and a hot water outlet header, so that water inlet and water outlet of the multi-section heat exchange units can be conveniently gathered.
An evaporator support is arranged on the inner wall of the cylindrical furnace body, an evaporator pipe clamp is arranged on the evaporator support, and the pipe bundles of the multi-section heat exchange units are respectively fixed on the respective evaporator pipe clamps. The cylindrical furnace body is provided with a plurality of manholes, manual inspection ports and explosion venting holes, and is used for maintenance and provided with a cover plate.
The steel frame is connected with the cylindrical furnace body through the rigid beam, and the steel frame is provided with the stairs and the platforms, so that the maintenance is convenient.
The lateral wall of the cylindrical furnace body is provided with a heat preservation layer and an isolation guard plate, so that external air is effectively prevented from entering the inside.
A use method of a converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device comprises the following steps:
the integrated device is matched with the cylindrical cyclone dust collector for use, and integrally forms a converter flue gas high-temperature cyclone dust removal waste heat boiler; the converter high-temperature flue gas enters from a converter flue gas high-temperature inlet, turns to the bottom of a cylindrical furnace body and rises, firstly exchanges heat through a C-type heat exchange unit, then enters a B-type heat exchange unit and an A-type heat exchange unit respectively to exchange heat, the temperature of the converter flue gas is reduced to 500 ℃ from 1000 ℃ (combustion or explosion risk of the flue gas at about 600 ℃) is avoided), enters a cylindrical cyclone dust collector through a converter flue gas low-temperature outlet, and is discharged after being dedusted by the cylindrical cyclone dust collector; in the operation process, if a certain heat exchange unit is in failure or damaged, the A-type heat exchange unit and the B-type heat exchange unit are connected in parallel, and valves on corresponding pipelines are closed, so that the whole heat exchange is not influenced, and the heat exchange unit can be immediately replaced and maintained or replaced when a converter is maintained and maintained; the whole process does not spray water.
Each heat exchange unit of the multi-section heat exchange units is of a cylindrical structure, and the water inlet end and the steam outlet end of each heat exchange pipe of each heat exchange unit extend out of the cylindrical furnace body through the middle pipe to be connected.
In the operation process, the ash cleaning device can be started according to the requirement.
At present, the water spraying and atomizing cooling converter high-temperature flue gas treatment process (the temperature is between 1000 ℃ plus 170 ℃) is commonly adopted at home and abroad, a large amount of precious water resources are consumed, the converter flue gas recovery process is complex, the equipment failure rate is high, the maintenance and repair cost is high, the emission exceeds the standard, and the heat energy and the activity of converter ash are lost (very good industrial raw materials) are caused.
The invention aims at the high-temperature flue gas (converter flue gas-high temperature, high dust, high C0 and continuous casting-continuous production characteristics) of a steel-making converter, does not spray water, adopts a pure dry process, synchronously recovers heat energy and removes dust, does not spray water, keeps the characteristics of converter ash (very good industrial raw materials) unchanged, and can be further processed to produce various industrial products, such as ferrous oxide, ferric oxide, ferroferric oxide, converter raw materials (50 percent of waste steel is replaced), slag-forming agents and the like.
The invention has the beneficial effects that: the invention does not spray water, saves water by 0.5T per ton of steel, reduces 30 percent of water vapor (the total amount of flue gas generated by water spray cooling), 50 percent of electric quantity of the fan, reduces maintenance and repair of the fan, removes the original water spray cooling device, and saves a large amount of equipment, manpower and material resources. The converter flue gas does not contain a large amount of water vapor, so that the CO concentration in the flue gas is improved, and the total recovery amount of the converter flue gas is increased by about 20-30%. The invention can replace the heat of the converter flue gas, and can be steam or hot water. Each ton of steel can produce 10kg of steam and 20kg of converter ash. The converter flue gas contains lower water vapor, the heat value is improved by about 10 percent, and the converter flue gas has no water vapor, thereby providing input conditions (the emission is less than 10 mg/m) for improving the recovery process of the converter flue gas, namely metal film electric dust removal3）。
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a steam drum according to an embodiment of the present invention;
FIG. 3 is a schematic view of a type A heat exchange unit according to an embodiment of the present invention;
FIG. 4 is a schematic view of a type B heat exchange unit and a type C heat exchange unit of an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a type B heat exchange unit and a type C heat exchange unit of an embodiment of the present invention;
FIG. 6 is a schematic diagram of a water flow circuit of a heat exchange unit according to an embodiment of the present invention;
in the figure: converter flue gas high-temperature inlet 1, converter flue gas low-temperature outlet 2, stairs 3, heat exchange unit steam hot water pipe 4, A-type heat exchange unit 5, B-type heat exchange unit I6, B-type heat exchange unit II 7, B-type heat exchange unit III 8, C-type heat exchange unit 9, shot blasting steel shot grille 10, shot blasting dragon 11, ash removal elevator 12, steel shot ash removal top bin 13, steam drum 14, ash bin vibrator 15, platform 16, cylindrical furnace body 17, softened water pipe 18, steam drum connecting pipe 19, manual inspection port and explosion venting hole 20, manhole 21, evaporator outlet header 22, rigid beam 23, evaporator pipe clamp 24, evaporator support 25, evaporator inlet header 26, coal economizer outlet header 27, rigid beam 28, coal economizer inlet header 29, steel frame 30, double-pipe serpentine pipe bundle 31, single-pipe bundle 32, disk-shaped pipe bundle 33, serpentine heat exchange pipe staggered arrangement 34, heat exchange pipe staggered arrangement 35, heat exchange unit, An ash bin 36.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
A converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device comprises a converter flue gas high-temperature inlet 1, a converter flue gas low-temperature outlet 2, a cylindrical furnace body 17, a steel frame 30, a multi-section heat exchange unit, a heat exchange unit steam hot water pipe 4, a softened water pipe 18 and a steam drum 14; a plurality of sections of heat exchange units are arranged in the cylindrical furnace body 17, the plurality of sections of heat exchange units are formed by splicing an A-type heat exchange unit 5, a B-type heat exchange unit and a C-type heat exchange unit 9 which are sequentially arranged from top to bottom, heat exchange tubes of the A-type heat exchange unit 5 are a plurality of layers of disk-shaped tube bundles 33, the disk-shaped tube bundles 33 are wound and arranged in one plane to form one layer of disk-shaped tube bundles 33, and the disk-shaped tube bundles 33 in the plurality of layers are mutually arranged in parallel in the cylindrical furnace body 17; the heat exchange tubes of the B-type heat exchange unit are double-tube serpentine tube bundles 31 connected end to end, and the two heat exchange tubes are arranged together and are coiled in a serpentine manner in the cylindrical furnace body 17 to form a multilayer double-tube serpentine tube bundle 31; the heat exchange tubes of the C-shaped heat exchange unit 9 are single tube serpentine tube bundles 32, and one heat exchange tube is coiled in a serpentine manner in the cylindrical furnace body 17 to form a plurality of layers of single tube serpentine tube bundles 32; a steel frame 30 is arranged outside the cylindrical furnace body 17, the heat exchange unit steam hot water pipe 4 and the softened water pipe 18 are arranged on the steel frame 30, one end of the heat exchange unit steam hot water pipe 4 and one end of the softened water pipe 18 are respectively connected with a water inlet and a water outlet of the steam drum 14, and the other end of the heat exchange unit steam hot water pipe 4 and the other end of the softened water pipe 18 respectively enter the cylindrical furnace body 17 to be connected with the multi-section heat exchange units; the A-type heat exchange unit 5 and the B-type heat exchange unit are connected in parallel and then connected in series with the C-type heat exchange unit 9, the water inlet of the C-type heat exchange unit 9 is connected with the softened water pipe 18, and the water outlet of the A-type heat exchange unit 5 and the B-type heat exchange unit which are connected in parallel is connected with the heat exchange unit steam hot water pipe 4; the cylindrical furnace body 17 is provided with a converter flue gas high-temperature inlet 1 and a converter flue gas low-temperature outlet 2, and the converter high-temperature flue gas rises from the bottom of the cylindrical furnace body 17, passes through the C-type heat exchange unit 9, the B-type heat exchange unit and the A-type heat exchange unit 5 in sequence for heat exchange, and is discharged through the converter flue gas low-temperature outlet 2.
The number of the B-type heat exchange units is three, and the B-type heat exchange units are respectively a first B-type heat exchange unit 6, a second B-type heat exchange unit 7 and a third B-type heat exchange unit 8, and the first B-type heat exchange unit 6, the second B-type heat exchange unit 7 and the third B-type heat exchange unit 8 are mutually arranged in parallel; the inlets of the first B-type heat exchange unit 6, the second B-type heat exchange unit 7 and the third B-type heat exchange unit 8 are connected with the outlet of the C-type heat exchange unit 9, and the outlets of the first B-type heat exchange unit 6, the second B-type heat exchange unit 7 and the third B-type heat exchange unit 8 are connected with the steam hot water pipe 4 of the heat exchange unit.
A type heat exchange unit 5, B type heat exchange unit 6, B type heat exchange unit two 7, B type heat exchange unit three 8 and C type heat exchange unit 9 of multistage heat transfer unit are the modularization heat exchange unit of independent arrangement, and in the operation process, if a certain unit breaks down or damages, can demolish the change alone, the maintenance of being convenient for.
The section of the B-type heat exchange unit is formed by arranging 34 heat exchange tubes of two adjacent layers in a staggered manner, namely in a staggered manner; the cross section of the C-shaped heat exchange unit 9 is formed by arranging two adjacent layers of heat exchange tubes 35 in an in-line mode, namely arranging the heat exchange tubes in rows up and down.
The bottom of the cylindrical furnace body 17 is provided with an ash bin 36 and an ash cleaning device, the device comprises a shot blasting steel shot grating 10, a shot blasting dragon 11, an ash bin vibrator 15, an ash cleaning elevator 12 and a steel shot ash cleaning top bin 13, the shot blasting steel shot grating 10 is arranged in the ash bin 36, the ash bin 36 above the shot blasting steel shot grating 10 is connected with the shot blasting dragon 11, and the ash bin 36 below the shot blasting steel shot grating 10 is provided with the ash bin vibrator 15; the shot blasting auger 11 is connected with a steel shot dust cleaning top bin 13 arranged at the top of the cylindrical furnace body 17 through a dust cleaning elevator 12.
The A-type heat exchange unit 5, the B-type heat exchange unit and the C-type heat exchange unit 9 are respectively provided with a softened water inlet header and a hot water outlet header, so that water inlet and water outlet of the multi-section heat exchange units can be conveniently gathered.
An evaporator support 25 is arranged on the inner wall of the cylindrical furnace body 17, an evaporator pipe clamp 24 is arranged on the evaporator support 25, and the pipe bundles of the multi-section heat exchange units are respectively fixed on the respective evaporator pipe clamps. The cylindrical furnace body 17 is provided with a plurality of manholes 21, manual inspection ports and explosion venting holes 20 for maintenance and is provided with a cover plate.
The steel frame 30 is connected with the cylindrical furnace body 17 through the rigid beams 28, and the steel frame 30 is provided with the stairs 3 and the platforms 16, so that the maintenance is convenient.
The lateral wall of the cylindrical furnace body is provided with a heat preservation layer and an isolation guard plate, so that external air is effectively prevented from entering the inside.
A use method of a converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device comprises the following steps:
the integrated device is matched with the cylindrical cyclone dust collector for use, and integrally forms a converter flue gas high-temperature cyclone dust removal waste heat boiler; the converter high-temperature flue gas enters from a converter flue gas high-temperature inlet 1, is transferred to the bottom of a cylindrical furnace body 17 to ascend, firstly exchanges heat through a C-type heat exchange unit 9, then enters a B-type heat exchange unit and an A-type heat exchange unit 5 respectively to exchange heat, is reduced to 500 ℃ from 1000 ℃ (combustion or explosion risk of the flue gas at about 600 ℃), enters a cylindrical cyclone dust collector through a converter flue gas low-temperature outlet 2, and is discharged after being dedusted by the cylindrical cyclone dust collector; in the operation process, if a certain heat exchange unit breaks down or is damaged, the A-type heat exchange unit 5 and the B-type heat exchange unit are connected in parallel, and valves on corresponding pipelines are closed, so that the whole heat exchange is not influenced, the heat exchange unit can be immediately replaced and maintained, or the heat exchange unit is maintained and maintained or replaced when a converter is waited; the whole process does not spray water.
Each heat exchange unit of the multi-section heat exchange units is of a cylindrical structure, and the water inlet end and the steam outlet end of each heat exchange pipe of each heat exchange unit extend out of the cylindrical furnace body through the middle pipe to be connected.
In the operation process, the ash cleaning device can be started according to the requirement.
The water and steam routes of the heat exchange unit in the embodiment are as follows:
softened water enters a C-shaped heat exchange unit 9 at the bottom of the cylindrical furnace body 17 through a softened water pipe 18, hot water after heat exchange respectively enters a first B-shaped heat exchange unit 6, a second B-shaped heat exchange unit 7 and a third B-shaped heat exchange unit 8 in the middle of the cylindrical furnace body 17, and simultaneously enters an A-shaped heat exchange unit 5 at the top of the cylindrical furnace body 17, and steam and hot water generated after heat exchange of the first A-shaped heat exchange unit 5, the first B-shaped heat exchange unit 6, the second B-shaped heat exchange unit 7 and the third B-shaped heat exchange unit 8 enter a steam drum 14 through a steam hot water pipe 4 of the heat exchange unit to utilize heat energy. The softened water cooled by the steam drum 14 flows back to the softened water pipe 18 for recycling.
In the embodiment, five heat exchange units, namely an A-type heat exchange unit 5, a B-type heat exchange unit I6, a B-type heat exchange unit II 7, a B-type heat exchange unit III 8 and a C-type heat exchange unit 9 are shared, and the A-type heat exchange unit 5 is an anti-explosion heat exchange unit; the first B-type heat exchange unit 6, the second B-type heat exchange unit 7 and the third B-type heat exchange unit 8 are high-temperature high-efficiency heat exchange units. All the heat exchange units are arranged on the evaporator pipe clamps 24 and the evaporator supports 25, all the heat exchange units are sealed by light core steel sealing pieces (resisting high temperature of 1500-.
The invention has 25% margin on heat exchange capacity, and when one heat exchange unit breaks down, the use of other heat exchange units can not be influenced as long as the water vapor valves at the inlet and the outlet of the heat exchange unit are closed. When the converter is maintained and repaired, the maintenance or replacement is carried out, and the integral operation of the converter cannot be influenced.
The converter flue gas cooled by heat exchange is led out from the low-temperature outlet 2 of the converter flue gas, and the temperature is about 180 ℃.
And a silicate and light core steel heat-insulating layer and a color steel protective plate are arranged on the outer wall of the cylindrical furnace body.
Claims (7)
1. The utility model provides an integrative device of converter flue gas high temperature cyclone dust removal exhaust-heat boiler which characterized in that: the device comprises a converter flue gas high-temperature inlet (1), a converter flue gas low-temperature outlet (2), a cylindrical furnace body (17), a steel frame (30), a multi-section heat exchange unit, a heat exchange unit steam hot water pipe (4), a softened water pipe (18) and a steam drum (14); the cylindrical furnace body (17) is internally provided with a plurality of sections of heat exchange units, the plurality of sections of heat exchange units are formed by splicing an A-type heat exchange unit (5), a B-type heat exchange unit and a C-type heat exchange unit (9) which are sequentially arranged from top to bottom, heat exchange tubes of the A-type heat exchange unit (5) are a plurality of layers of disk-shaped tube bundles (33), the disk-shaped tube bundles (33) are wound and arranged on one plane to form one layer of disk-shaped tube bundles (33), and the plurality of layers of disk-shaped tube bundles (33) are arranged in the cylindrical furnace body (17) in parallel; the heat exchange tubes of the B-type heat exchange unit are double-tube snake-shaped tube bundles (31) which are connected end to end, the two heat exchange tubes are arranged together and are arranged in a snake-shaped coil in the cylindrical furnace body (17) to form a multilayer double-tube snake-shaped tube bundle (31); the heat exchange tubes of the C-shaped heat exchange unit (9) are single tube serpentine tube bundles (32), and one heat exchange tube is coiled in a serpentine manner in the cylindrical furnace body (17) to form a plurality of layers of single tube serpentine tube bundles (32); a steel frame (30) is arranged outside the cylindrical furnace body (17), the heat exchange unit steam hot water pipe (4) and the softened water pipe (18) are arranged on the steel frame (30), one end of the heat exchange unit steam hot water pipe (4) and one end of the softened water pipe (18) are respectively connected with a water inlet and a water outlet of the steam drum (14), and the other end of the heat exchange unit steam hot water pipe (4) and the other end of the softened water pipe (18) respectively enter the cylindrical furnace body (17) to be connected with the multi-section heat exchange units; the A-type heat exchange unit (5) and the B-type heat exchange unit are connected in parallel and then connected in series with the C-type heat exchange unit (9), the water inlet of the C-type heat exchange unit (9) is connected with a softened water pipe (18), and the water outlet of the A-type heat exchange unit (5) and the B-type heat exchange unit which are connected in parallel is connected with a steam hot water pipe (4) of the heat exchange unit; a converter flue gas high-temperature inlet (1) and a converter flue gas low-temperature outlet (2) are formed in the cylindrical furnace body (17), and converter high-temperature flue gas rises from the bottom of the cylindrical furnace body (17), passes through the C-type heat exchange unit (9), the B-type heat exchange unit and the A-type heat exchange unit (5) in sequence for heat exchange and is discharged through the converter flue gas low-temperature outlet (2);
an evaporator support (25) is arranged on the inner wall of the cylindrical furnace body (17), an evaporator pipe clamp (24) is arranged on the evaporator support (25), and the pipe bundles of the multi-section heat exchange units are respectively fixed on the respective evaporator pipe clamps.
2. The converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device as claimed in claim 1, is characterized in that: the number of the B-type heat exchange units is three, and the B-type heat exchange units are respectively a first B-type heat exchange unit (6), a second B-type heat exchange unit (7) and a third B-type heat exchange unit (8), and the first B-type heat exchange unit (6), the second B-type heat exchange unit (7) and the third B-type heat exchange unit (8) are arranged in parallel; the inlets of the first B-type heat exchange unit (6), the second B-type heat exchange unit (7) and the third B-type heat exchange unit (8) are connected with the outlet of the C-type heat exchange unit (9), and the outlets of the first B-type heat exchange unit (6), the second B-type heat exchange unit (7) and the third B-type heat exchange unit (8) are connected with the steam hot water pipe (4) of the heat exchange unit.
3. The converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device as claimed in claim 2, characterized in that: the A-type heat exchange unit (5), the B-type heat exchange unit I (6), the B-type heat exchange unit II (7), the B-type heat exchange unit III (8) and the C-type heat exchange unit (9) of the multi-section heat exchange units are modular heat exchange units which are independently arranged.
4. The converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device according to claim 2 or 3, characterized in that: the section of the B-type heat exchange unit is formed by staggered arrangement (34) of two adjacent layers of heat exchange tubes, namely staggered arrangement and staggered arrangement; the cross section of the C-shaped heat exchange unit (9) is formed by arranging two adjacent layers of heat exchange tubes (35) in an in-line mode, namely arranging the heat exchange tubes in rows up and down.
5. The converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device according to claim 1 or 2, characterized in that: the bottom of the cylindrical furnace body (17) is provided with an ash bin (36) and an ash removal device, the device comprises a shot blasting steel shot grating (10), a shot blasting dragon (11), an ash bin vibrator (15), an ash removal elevator (12) and a steel shot ash removal top bin (13), the shot blasting steel shot grating (10) is arranged in the ash bin (36), the ash bin (36) above the shot blasting steel shot grating (10) is connected with a shot blasting dragon (11), and the ash bin (36) below the shot blasting steel shot grating (10) is provided with the ash bin vibrator (15); the shot blasting flood dragon (11) is connected with a steel shot dust cleaning top bin (13) arranged at the top of the cylindrical furnace body (17) through a dust cleaning elevator (12).
6. The converter flue gas high-temperature cyclone dust removal waste heat boiler integrated device according to claim 1 or 2, characterized in that: the cylindrical furnace body (17) is provided with a plurality of manholes (21), manual inspection ports and explosion venting holes (20).
7. A use method of an integrated device of a converter flue gas high-temperature cyclone dust removal waste heat boiler is characterized in that the integrated device defined by any one of claims 1 to 6 is adopted, and the method comprises the following steps:
the integrated device is matched with the cylindrical cyclone dust collector for use, and integrally forms a converter flue gas high-temperature cyclone dust removal waste heat boiler; the converter high-temperature flue gas enters from a converter flue gas high-temperature inlet (1), is transferred to the bottom of a cylindrical furnace body (17) to ascend, firstly exchanges heat through a C-shaped heat exchange unit (9), then respectively enters a B-shaped heat exchange unit and an A-shaped heat exchange unit (5) to exchange heat, is reduced to 500 ℃ from 1000 ℃, avoids combustion or explosion risk of the flue gas at about 600 ℃, enters a cylindrical cyclone dust collector through a converter flue gas low-temperature outlet (2), and is discharged after being dedusted by the cylindrical cyclone dust collector; in the operation process, if a certain heat exchange unit breaks down or is damaged, because the A-type heat exchange unit (5) and the B-type heat exchange unit are connected in parallel, the valve on the corresponding pipeline is closed, the whole heat exchange is not influenced, the whole heat exchange unit can be immediately replaced and maintained, or the maintenance or the replacement is carried out when the converter is maintained and maintained; the whole process does not spray water.
Priority Applications (1)
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