CN211233999U - Waste heat recovery system of continuous preheating conveyor of converter - Google Patents
Waste heat recovery system of continuous preheating conveyor of converter Download PDFInfo
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- CN211233999U CN211233999U CN201922274802.2U CN201922274802U CN211233999U CN 211233999 U CN211233999 U CN 211233999U CN 201922274802 U CN201922274802 U CN 201922274802U CN 211233999 U CN211233999 U CN 211233999U
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Abstract
The utility model discloses a waste heat recovery system of a continuous preheating conveyor of a converter, wherein the continuous preheating conveyor is provided with a high-temperature flue gas outlet which is connected with a preheating recovery device, and the preheating recovery device is divided into an air preheating part and a flue gas preheating part according to the flue gas trend; the air preheating part comprises a first smoke air cavity and a first air cavity; the flue gas preheating part comprises a second flue gas cavity and a second heat exchange cavity, and the second heat exchange cavity is divided into a second air cavity and a second coal gas cavity. The utility model discloses combustion air and coal gas can preheat, and the coal gas after preheating can improve the combustion value, makes the burning that coal gas can be abundant, and then has improved production efficiency height, has reduced the energy consumption, and not only environmental protection is energy-conserving again.
Description
Technical Field
The utility model relates to a converter steelmaking technical field especially relates to a converter is preheating conveyer waste heat recovery system in succession.
Background
At present, high-temperature flue gas generated by a continuous preheating conveyor of a converter absorbs a part of the high-temperature flue gas through scrap steel, and the residual hot gas directly enters a dust remover, so that the hot gas cannot be well utilized.
The applicant applies for a utility model patent with a name of converter continuous feeding preheating vibrating conveyor on the 08-02 th month in 2018, publication number CN208562441U, and discloses the following technical scheme: it has a rectangular conveyer trough at the suspension on a rectangular support, install a vibration exciter at the afterbody of conveyer trough, install the heat preservation cover in the first half part top of conveyer trough, install water-cooling sealing system between heat preservation cover and conveyer trough, install the nozzle of a plurality of equipartitions in heat preservation cover both sides to the conveyer trough, install ejection of compact temperature-detecting device in one side of discharge gate on the heat preservation cover, tail end gas outlet department at the heat preservation cover is equipped with gas temperature-detecting device and pressure transmitter and dynamic seal device, install press device between dynamic seal device and feed section conveyer trough. The utility model discloses the coal gas that produces when producing with the converter preheats for the raw materials in succession, has energy saving, improves production efficiency, advantages such as reduction in production cost.
Further improvement, the applicant applies for a utility model patent of an electric furnace continuous preheating conveyor on 24.01.2019, publication No. CN209485071U, and discloses the following technical scheme: the non-resonant continuous preheating conveyor comprises a non-resonant continuous preheating conveyor, a reciprocating vibration exciter is installed at the rear end of a conveying groove, the vibration exciter and the conveying groove are both hung on a supporting seat, a feeding section is reserved at the rear end of the conveying groove, a heat-insulating cover is installed on the upper portion of the rear end of the conveying groove, a water-cooling cover is installed in front of the heat-insulating cover, uniformly distributed heating nozzles and flue gas temperature detection devices are installed in the conveying groove on the two sides or the upper portion of the heat-insulating cover, a combustion air heat exchanger is installed in front of a flue gas outlet, a water-cooling sealing system is installed between the heat-insulating cover and the conveying groove, a flame detection device and a pressure transmitter are respectively arranged behind each nozzle, a movable transport trolley is installed between the conveying groove and an. The utility model can greatly improve the preheating temperature of scrap steel smelting, shorten the smelting time and play the roles of energy conservation and efficiency improvement.
Further improvement, the applicant applies for an invention patent of an alloy material preheating system and method for steelmaking on 25.03.2019, publication number CN109945661A, and discloses the following technical scheme: the intelligent vibration-damping device comprises a conveying unit, a driving unit, a supporting unit, a vibration-damping unit, a heating unit, a heat-insulating unit, a sealing unit and an intelligent control unit. Before the alloy material is added into a steelmaking furnace, the alloy material is preheated and baked through a heating unit, the moisture attached to the alloy material is evaporated, the yield of the alloy and the steelmaking quality are improved, the temperature of the alloy material is ensured, the production efficiency is high, and the energy conservation and the environmental protection are realized.
The technical scheme also discloses a preheating recovery function for the high-temperature flue gas, but the preheating recovery efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a converter preheats conveyer waste heat recovery system in succession.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a waste heat recovery system of a continuous preheating conveyor of a converter comprises the continuous preheating conveyor, wherein a high-temperature flue gas outlet is formed in the continuous preheating conveyor and is connected with a preheating recovery device, and the preheating recovery device sequentially comprises an air preheating part and a flue gas preheating part along the flue gas direction;
the air preheating part comprises a first cylinder, a first partition board extending along the axial direction is arranged in the first cylinder, and the first partition board divides the first cylinder into two cavities, namely a first smoke air cavity and a first air cavity;
one end of the first air cavity close to the flue gas preheating part is closed, and a first air cavity inlet which is arranged in the radial direction is arranged at the adjacent side part;
the two axial ends of the first smoke cavity are respectively provided with a first smoke cavity inlet and a first smoke cavity outlet, and the first smoke cavity inlet is connected with the high-temperature smoke outlet;
a floating head type heat exchange sleeve is arranged between the first air cavity and the first smoke cavity in a penetrating way, and the floating head type heat exchange sleeves are arranged in an array way; the floating head type heat exchange sleeve comprises an outer sleeve and an inner sleeve which are coaxially arranged, the outer sleeve extends into the first smoke cavity from the partition plate, one end of the outer sleeve in the first smoke cavity is closed, and the partition plate is open;
the inner sleeve is inserted into the outer sleeve from the opening of the outer sleeve, the inner sleeve is in clearance fit with the outer sleeve, and the other end of the inner sleeve penetrates out of the first cylinder on the side of the first air cavity in a sealing mode to form a first air cavity outlet;
when the air preheating part works, high-temperature flue gas enters the first flue gas cavity from the inlet of the first flue gas cavity, is discharged from the outlet of the first flue gas cavity and enters the coal gas preheating section, and the high-temperature flue gas realizes heat transfer with the outer sleeve in a flowing process; air enters from the first air cavity inlet, then enters the gap between the inner sleeve and the outer sleeve, enters the inner sleeve, then flows through the inner sleeve to the first air cavity outlet and is discharged, and the air exchanges heat with the outer sleeve in the flowing process to realize the preheating of the air;
the flue gas preheating part comprises a second cylinder, a second partition plate extending along the axial direction is arranged in the second cylinder, and the second cylinder is divided into two cavities, namely a second flue gas cavity and a second coal gas cavity, by the second partition plate;
the two axial ends of the second smoke cavity are respectively provided with a second smoke cavity inlet and a second smoke cavity outlet, and the second smoke cavity inlet is communicated with the first smoke cavity outlet;
one end of the second gas cavity close to the air preheating part is closed, a second gas cavity outlet which is arranged in the radial direction is arranged at the adjacent side part, and the other end of the second gas cavity is provided with a second gas cavity inlet;
heat pipes are arranged between the second gas cavity and the second smoke cavity in an array mode, the heating ends of the heat pipes are located in the second smoke cavity, and the heat dissipation ends of the heat pipes are located in the corresponding second gas cavity and the second gas cavity;
when the flue gas preheating part works, high-temperature flue gas discharged by the air preheating part enters the second flue gas cavity from the inlet of the second flue gas cavity, the high-temperature flue gas heats the heating end of the heat pipe, the heating end takes away heat and transfers the heat to the heat dissipation end, and the flue gas after heat exchange is discharged from the outlet of the second flue gas cavity;
the coal gas enters the second coal gas cavity from the inlet of the second coal gas cavity, the coal gas exchanges heat with the heat dissipation end of the heat pipe in the second coal gas cavity, and the preheated coal gas is discharged from the outlet of the second coal gas cavity, so that the coal gas is preheated.
The continuous preheating conveyor is sequentially divided into a preheating section and a heating section along the conveying direction, a high-temperature flue gas outlet is formed in the preheating section, a burner is arranged in the heating section, the burner is connected with an air inlet pipe for supplying combustion air and a coal gas inlet pipe for supplying coal gas, a first air cavity outlet is connected with the air inlet pipe of the burner, and a second coal gas cavity outlet is connected with a fuel gas inlet pipe of the burner.
And the outlet of the second flue gas cavity is connected with a waste gas treatment system.
The first flue gas cavity inlet is arranged at the side part of the first cylinder and is arranged towards the continuous preheating conveyor along the radial direction.
The air preheating part and the smoke preheating part are coaxially connected.
The bottom of first gas chamber and second gas chamber sets and subsides fill.
A variable-frequency speed-regulating draught fan is arranged between the first flue gas cavity inlet and the high-temperature flue gas outlet, and the high-temperature flue gas continuously preheating the conveyor is introduced into the first flue gas cavity inlet from the high-temperature flue gas outlet by the variable-frequency speed-regulating draught fan.
The utility model has the advantages that:
the utility model discloses a waste heat recovery system especially preheats the conveyer in succession to the converter and uses, after preheating the high temperature flue gas of conveyer the inside in succession and preheating the scrap steel, remaining hot gas gets into waste heat recovery device the inside, can preheat combustion air and coal gas, and the coal gas after preheating can improve the combustion value, makes the burning that coal gas can be abundant, and then has improved production efficiency height, has reduced the energy consumption, both environmental protection, energy-conservation again.
Drawings
Fig. 1 is a front view of the overall arrangement of an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a sectional view taken along line C-C of FIG. 1;
FIG. 5 is a sectional view taken along line D-D of FIG. 1;
fig. 6 is a top view of the overall arrangement of an embodiment of the present invention;
FIG. 7 is a top view of the preheating recovery device in the embodiment of the present invention;
FIG. 8 is a front view of an air preheating part in the preheating recovery device;
FIG. 9 is a plan view of an air preheating part in the preheating recovery device;
FIG. 10 is a sectional view taken along line E-E in FIG. 8;
FIG. 11 is a sectional view taken along line F-F of FIG. 13;
FIG. 12 is an enlarged view of the floating head heat exchange sleeve of FIG. 8;
FIG. 13 is a top view of the flue gas preheating section of the preheating recovery device;
FIG. 14 is a sectional view taken along line G-G of FIG. 13;
FIG. 15 is a sectional view taken along line H-H in FIG. 13;
fig. 16 is a schematic workflow diagram of an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1 to 16, in the waste heat recovery system of the continuous preheating conveyor of the converter of the present embodiment, the continuous preheating conveyor 1 is sequentially divided into a preheating section and a heating section along the conveying direction, the preheating section is provided with a high temperature flue gas outlet 9, the high temperature flue gas outlet is connected with a preheating recovery device 6, the preheating recovery device 6 is divided into an air preheating part 7 and a flue gas preheating part 8 according to the flue gas direction, and the air preheating part 7 and the flue gas preheating part 8 are coaxially connected.
The air preheating part 7 includes a first cylinder 71, a first partition 72 extending in the axial direction is provided in the first cylinder 71, and the first partition divides the first cylinder into two cavities, namely a first flue gas cavity 701 and a first air cavity 702.
A first air chamber 702 is provided adjacent the flue gas preheating section 8 with a first air chamber inlet 73. In this embodiment the first air chamber is closed at one end adjacent the flue gas preheating section 8 and is provided with radially arranged first air chamber inlets 73 at the adjacent side.
The axial both ends of the first flue gas chamber 701 are respectively provided as a first flue gas chamber inlet 74 and a first flue gas chamber outlet 75, the first flue gas chamber inlet 74 being provided at the side of the first cylinder 71 and being arranged radially toward the continuous preheating conveyor 1. The first flue gas chamber inlet 74 is connected to the high temperature flue gas outlet 9. In this embodiment, a variable-frequency speed-regulating induced draft fan is arranged between the first flue gas cavity inlet 74 and the high-temperature flue gas outlet 9, and the variable-frequency speed-regulating induced draft fan introduces the high-temperature flue gas continuously preheating the conveyor into the first flue gas cavity inlet 74 from the high-temperature flue gas outlet 9.
Floating head type heat exchange sleeves 76 are arranged between the first air cavity 702 and the first smoke air cavity 701 in a penetrating mode, and the floating head type heat exchange sleeves 76 are arranged in an array mode; the floating head type heat exchange sleeve 76 comprises an outer sleeve 761 and an inner sleeve 762 which are coaxially arranged, the outer sleeve 761 extends to the inside of the first smoke cavity from the partition plate, one end of the outer sleeve 761 in the first smoke cavity is closed, and the partition plate is open.
The inner tube 762 is inserted into the outer tube 761 from the opening of the outer tube 761, the inner tube 762 is in clearance fit with the outer tube 761, and the other end of the inner tube 762 passes through the first cylinder 71 on the first air cavity side in a sealing manner to form a first air cavity outlet 77.
When the air preheating part 7 works, high-temperature flue gas enters the first flue gas cavity 701 from the first flue gas cavity inlet 74 and is discharged from the first flue gas cavity outlet 75, and the heat transfer between the high-temperature flue gas and the outer sleeve 761 is realized in a flowing process; air enters 702 from the first air cavity inlet 73, then enters a gap between the inner sleeve 762 and the outer sleeve 761, enters the inner sleeve 761 and then flows to the first air cavity outlet 77 to be discharged, and the air exchanges heat with the outer sleeve 761 in the flowing process, so that the air is preheated.
The flue gas preheating part 8 comprises a second cylinder 81, a second partition plate 82 extending along the axial direction is arranged in the second cylinder 81, and the second cylinder 81 is divided into two cavities, namely a second flue gas cavity 801 and a second coal gas cavity 802, by the second partition plate.
The axial two ends of the second flue gas cavity 801 are respectively provided with a second flue gas cavity inlet 84 and a second flue gas cavity outlet 85, and the second flue gas cavity inlet 84 is communicated with the first flue gas cavity outlet 75.
One end of the second gas cavity 802 close to the air preheating part 7 is closed, a second gas cavity outlet 88 arranged in the radial direction is arranged at the adjacent side part, and a second gas cavity inlet 89 is arranged at the other end of the second gas cavity.
The heat pipes 90 penetrate between the second gas cavity 802 and the second flue gas cavity 801, the heat pipes 90 are arranged in an array mode, the heating ends of the heat pipes 90 are located in the second flue gas cavity, and the heat dissipation ends of the heat pipes 90 are located in the corresponding second gas cavity and the corresponding second gas cavity.
When the flue gas preheating part 8 works, high-temperature flue gas discharged by the air preheating part 7 enters the second flue gas cavity 801 from the second flue gas cavity inlet 84, the high-temperature flue gas heats the heating end of the heat pipe 90, the heating end takes away heat and transfers the heat to the heat dissipation end, and the flue gas after heat exchange is discharged from the second flue gas cavity outlet 85.
The coal gas enters the second coal gas cavity from the second coal gas cavity inlet 89, the coal gas exchanges heat with the heat dissipation end of the heat pipe 90 in the second coal gas cavity, and the preheated coal gas is discharged from the second coal gas cavity outlet 88.
The overall working principle of the preheating recovery device 6 is as follows: the high-temperature flue gas enters the preheating recovery device 6 from the high-temperature flue gas outlet 9, sequentially flows through the first flue gas cavity 701 of the air preheating part 7 and the second flue gas cavity 801 of the flue gas preheating part 8, and is then discharged to the waste gas treatment system (i.e., the dust remover 11) through the second flue gas cavity outlet 85.
Air enters the air preheating part from the first air cavity inlet 73, the air entering the air preheating part enters the gap between the inner sleeve 762 and the outer sleeve 761, enters the inner sleeve 761 and then flows to the first air cavity outlet 77 to be discharged, and the air exchanges heat with the outer sleeve 761 in the flowing process.
The coal gas enters a second coal gas cavity from a second coal gas cavity inlet 89 of the flue gas preheating part, the coal gas exchanges heat with the heat dissipation end of the heat pipe 90 in the second coal gas cavity, and the preheated coal gas is discharged from a second coal gas cavity outlet 88. The flue gas preheating part 8 realizes primary preheating of coal gas. Because the high-temperature flue gas entering the flue gas preheating part 8 is subjected to overheating exchange with air in the air preheating part 7, the coal gas is preheated after the temperature of the high-temperature flue gas is relatively reduced, and accidents caused by direct ignition of the coal gas are avoided.
In the embodiment, air and coal gas are preheated by the air preheating part 7 and the smoke preheating part 8 respectively, so that explosion caused by mixing of the air and the coal gas is avoided.
In this embodiment, the heating section of the continuous preheating conveyor 1 is provided with the burner 10, the burner 10 is connected with an air inlet pipe for supplying combustion air and a gas inlet pipe for supplying gas, the first air chamber outlet 77 is connected with the air inlet pipe of the burner 10, and the second gas chamber outlet 88 is connected with the gas inlet pipe of the burner 10, so that the dual preheating of the combustion air and the gas of the burner is realized, the energy recycling is realized, the preheated gas can improve the combustion value, and the gas can be sufficiently combusted.
In this embodiment, the bottom of the first flue gas chamber and the bottom of the second flue gas chamber are provided with the sedimentation bucket, impurities generated by high-temperature baking of the scrap steel enter the preheating recovery device 6, then a part of impurities can be precipitated in the first flue gas chamber and the second flue gas chamber, and the impurities are periodically cleaned through the sedimentation bucket.
The continuous preheating conveyor 1 is matched with the preheating recovery device 6, and has the advantages of high efficiency, energy conservation, environmental protection, waste gas recycling and high production efficiency.
The embodiment also discloses an even distribution system matched with the continuous preheating conveyor 1, the even distribution system comprises a cloth vibrating conveyor 2 which is arranged at one feeding end of the continuous preheating conveyor 1 and used for evenly distributing the cloth to the continuous preheating conveyor 1, and the cloth vibrating conveyor 2 and the continuous preheating conveyor 1 are vertically arranged on the plane.
The cloth jigging conveyer 2 feeds materials to the conveying basket (the conveying basket is not shown in the attached drawing, and the conveying basket is mutually common with the conveying basket 43 on the transfer conveying line 4), the truck pulls the conveying basket to convey the materials to the position near the cloth jigging conveyer 2, the conveying basket is lifted by the crown block to add scrap steel to the cloth jigging conveyer 2, and the cloth jigging conveyer 2 carries out jigging conveying to the continuous preheating conveyer 1.
The continuous preheating conveyor 1 is provided with a cloth mechanical arm 3 at the other side opposite to the cloth vibrating conveyor 2, and the cloth mechanical arm 3 is used for adjusting the cloth uniformity at the connecting position of the cloth vibrating conveyor 1 and the continuous preheating conveyor 2.
The feeding monitoring probe is connected with a signal input end of a control center, a signal output end of the control center is connected with a cloth mechanical arm 3, and a signal output end of the control center is also connected with the cloth vibrating conveyor 2.
During operation, the material monitoring probe can see the thickness of the material layer at the connecting position of the material distribution vibrating conveyor 2 and the continuous preheating conveyor 1, if the material layer has large lump material blocking or has a material stacking phenomenon, the control center sends a signal to control the material distribution mechanical arm 3 to pull the large lump material or the material stacking, and simultaneously the control center sends a signal to adjust the conveying speed of the material distribution vibrating conveyor 2 to ensure uniform material distribution.
The material distribution vibrating conveyor, the material distribution mechanical arm and the continuous preheating conveyor are matched, so that the material loading speed is greatly shortened, the production efficiency is improved, and the energy consumption is reduced.
The material entering the continuous preheating conveyor 1 is preheated in the forward conveying process and then discharged from one discharging end. The structure and principle of the continuous preheating conveyor 1 are disclosed in the patent previously filed by the applicant, and the detailed description of the embodiment is omitted, and the following patents are specifically disclosed: 1. the name is the utility model patent of the converter continuous feeding preheating vibrating conveyor, publication number CN 208562441U; 2. the utility model is named as a utility model of an electric furnace continuous preheating conveyor, and is published under the number CN 209485071U; 3. the name is an alloy material preheating system and method for steelmaking, and the publication number is CN 109945661A.
The one end of the ejection of compact of preheating conveyer 1 in succession is equipped with transports transfer chain 4, transports transfer chain 4 and is connected with the converter.
The transfer conveying line 4 mainly comprises a conveying track 41 and a transport trolley 42 in guiding fit with the conveying track 41, and a conveying basket 43 is placed on the transport trolley; the transport trolley 42 travels 41 along the conveying track to the vicinity of the converter, and the transport basket is lifted by a crown block to feed the scrap into the converter.
The conveying track 41 is provided with a track scale, and the waste steel is measured by the track scale so as to realize accurate control of the amount of the waste steel added into the converter.
The transfer conveying line 4 and the continuous preheating conveyor 1 are vertically arranged on the plane, so that the conveying basket 43 can be conveniently moved, the blanking point on the conveying basket 43 is adjusted, and the phenomenon that scrap steel directly falls to the same place too much and overflows can be avoided.
The other side that is located relative continuous preheating conveyer 1 of transfer line 4 has arranged and has transported arm 5, transports arm 5 and is used for adjusting the cloth uniform degree that preheats conveyer 1 in succession and transports 4 hookup locations of transfer line.
The embodiment also comprises a material conveying monitoring probe for monitoring the connecting position of the continuous preheating conveyor 1 and the transfer conveying line 4, the material conveying monitoring probe is connected with a signal input end of a control center, a signal output end of the control center is connected with the transfer mechanical arm 5, and a signal output end of the control center is connected with the transport trolley 42.
During operation, can see transportation basket 43 through material monitor, if certain point windrow is too high or there is the material in the edge in the transportation basket 43, then control center signals control cloth arm 3 and dial the windrow or dial the material in edge to transportation basket 43 center to control center can send signal adjustment travelling bogie 42's position in order to adjust the blanking point on the transportation basket 43, guarantee even cloth.
The cloth vibrating conveyor, the cloth mechanical arm, the transfer conveying line, the transfer mechanical arm and the continuous preheating conveyor are matched, energy is saved, the energy consumption of an enterprise is greatly reduced, the steelmaking period of the converter is shortened, the production efficiency is improved, the production capacity is increased, and the income of a user is greatly improved.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
In the description of the present invention, it should be understood that the terms "front", "back", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the description refers must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
Claims (7)
1. The utility model provides a converter preheats conveyer waste heat recovery system in succession, includes the conveyer of preheating in succession, its characterized in that: the continuous preheating conveyor is provided with a high-temperature flue gas outlet, the high-temperature flue gas outlet is connected with a preheating recovery device, and the preheating recovery device sequentially comprises an air preheating part and a flue gas preheating part along the flue gas direction;
the air preheating part comprises a first cylinder, a first partition board extending along the axial direction is arranged in the first cylinder, and the first partition board divides the first cylinder into two cavities, namely a first smoke air cavity and a first air cavity;
one end of the first air cavity close to the flue gas preheating part is closed, and a first air cavity inlet which is arranged in the radial direction is arranged at the adjacent side part;
the two axial ends of the first smoke cavity are respectively provided with a first smoke cavity inlet and a first smoke cavity outlet, and the first smoke cavity inlet is connected with the high-temperature smoke outlet;
a floating head type heat exchange sleeve is arranged between the first air cavity and the first smoke cavity in a penetrating way, and the floating head type heat exchange sleeves are arranged in an array way; the floating head type heat exchange sleeve comprises an outer sleeve and an inner sleeve which are coaxially arranged, the outer sleeve extends into the first smoke cavity from the partition plate, one end of the outer sleeve in the first smoke cavity is closed, and the partition plate is open;
the inner sleeve is inserted into the outer sleeve from the opening of the outer sleeve, the inner sleeve is in clearance fit with the outer sleeve, and the other end of the inner sleeve penetrates out of the first cylinder on the side of the first air cavity in a sealing mode to form a first air cavity outlet;
when the air preheating part works, high-temperature flue gas enters the first flue gas cavity from the inlet of the first flue gas cavity, is discharged from the outlet of the first flue gas cavity and enters the coal gas preheating section, and the high-temperature flue gas realizes heat transfer with the outer sleeve in a flowing process; air enters from the first air cavity inlet, then enters the gap between the inner sleeve and the outer sleeve, enters the inner sleeve, then flows through the inner sleeve to the first air cavity outlet and is discharged, and the air exchanges heat with the outer sleeve in the flowing process to realize the preheating of the air;
the flue gas preheating part comprises a second cylinder, a second partition plate extending along the axial direction is arranged in the second cylinder, and the second cylinder is divided into two cavities, namely a second flue gas cavity and a second coal gas cavity, by the second partition plate;
the two axial ends of the second smoke cavity are respectively provided with a second smoke cavity inlet and a second smoke cavity outlet, and the second smoke cavity inlet is communicated with the first smoke cavity outlet;
one end of the second gas cavity close to the air preheating part is closed, a second gas cavity outlet which is arranged in the radial direction is arranged at the adjacent side part, and the other end of the second gas cavity is provided with a second gas cavity inlet;
heat pipes are arranged between the second gas cavity and the second smoke cavity in an array mode, the heating ends of the heat pipes are located in the second smoke cavity, and the heat dissipation ends of the heat pipes are located in the corresponding second gas cavity and the second gas cavity;
when the flue gas preheating part works, high-temperature flue gas discharged by the air preheating part enters the second flue gas cavity from the inlet of the second flue gas cavity, the high-temperature flue gas heats the heating end of the heat pipe, the heating end takes away heat and transfers the heat to the heat dissipation end, and the flue gas after heat exchange is discharged from the outlet of the second flue gas cavity;
the coal gas enters the second coal gas cavity from the inlet of the second coal gas cavity, the coal gas exchanges heat with the heat dissipation end of the heat pipe in the second coal gas cavity, and the preheated coal gas is discharged from the outlet of the second coal gas cavity, so that the coal gas is preheated.
2. The waste heat recovery system of the continuous preheating conveyor of the converter according to claim 1, characterized in that: the continuous preheating conveyor is sequentially divided into a preheating section and a heating section along the conveying direction, a high-temperature flue gas outlet is formed in the preheating section, a burner is arranged in the heating section, the burner is connected with an air inlet pipe for supplying combustion air and a coal gas inlet pipe for supplying coal gas, a first air cavity outlet is connected with the air inlet pipe of the burner, and a second coal gas cavity outlet is connected with a fuel gas inlet pipe of the burner.
3. The system for recovering the waste heat of the continuous preheating conveyor of the converter according to claim 1 or 2, wherein: and the outlet of the second flue gas cavity is connected with a waste gas treatment system.
4. The system for recovering the waste heat of the continuous preheating conveyor of the converter according to claim 1 or 2, wherein: the first flue gas cavity inlet is arranged at the side part of the first cylinder and is arranged towards the continuous preheating conveyor along the radial direction.
5. The system for recovering the waste heat of the continuous preheating conveyor of the converter according to claim 1 or 2, wherein: the air preheating part and the smoke preheating part are coaxially connected.
6. The system for recovering the waste heat of the continuous preheating conveyor of the converter according to claim 1 or 2, wherein: the bottom of first gas chamber and second gas chamber sets and subsides fill.
7. The system for recovering the waste heat of the continuous preheating conveyor of the converter according to claim 1 or 2, wherein: a variable-frequency speed-regulating draught fan is arranged between the first flue gas cavity inlet and the high-temperature flue gas outlet, and the high-temperature flue gas continuously preheating the conveyor is introduced into the first flue gas cavity inlet from the high-temperature flue gas outlet by the variable-frequency speed-regulating draught fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922274802.2U CN211233999U (en) | 2019-12-18 | 2019-12-18 | Waste heat recovery system of continuous preheating conveyor of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922274802.2U CN211233999U (en) | 2019-12-18 | 2019-12-18 | Waste heat recovery system of continuous preheating conveyor of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211233999U true CN211233999U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922274802.2U Active CN211233999U (en) | 2019-12-18 | 2019-12-18 | Waste heat recovery system of continuous preheating conveyor of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211233999U (en) |
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2019
- 2019-12-18 CN CN201922274802.2U patent/CN211233999U/en active Active
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