CN217236491U - Waste heat utilization equipment of sintering machine high temperature flue gas - Google Patents
Waste heat utilization equipment of sintering machine high temperature flue gas Download PDFInfo
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- CN217236491U CN217236491U CN202220546558.XU CN202220546558U CN217236491U CN 217236491 U CN217236491 U CN 217236491U CN 202220546558 U CN202220546558 U CN 202220546558U CN 217236491 U CN217236491 U CN 217236491U
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Abstract
The utility model discloses a waste heat utilization equipment of sintering machine high temperature flue gas, including the sintering machine, sintering section flue, cooling zone flue and exhaust-heat boiler, one side of sintering machine is provided with the regulator, middle part in the regulator is provided with horizontal baffle, horizontal baffle cuts apart into temperature regulating room and gas storage chamber with the inner space of regulator, be provided with the inner tube in the temperature regulating room, the temperature regulating room and the mixing chamber of intercommunication are cut apart into with the temperature regulating room to the inner tube, be provided with heating element in the temperature regulating room, the high temperature section of sintering section flue and cooling zone flue is respectively through communicating pipe and mixing chamber intercommunication, the low temperature section outside of sintering section flue and cooling zone flue is provided with the clamp cover, gas-supply pipe and corresponding communicating pipe intercommunication are passed through to the one side of clamp cover, corresponding flue passes through air supply pipe and temperature regulating room intercommunication in the opposite side of clamp cover, through the pipeline intercommunication between gas storage chamber and the exhaust-heat boiler. The utility model discloses convenient operation, exhaust-heat boiler can the steady operation, and waste heat utilization rate is high, has apparent economic value and social value.
Description
Technical Field
The utility model relates to a flue gas waste heat recovery utilizes technical field, concretely relates to waste heat utilization equipment of sintering machine high temperature flue gas.
Background
As a stone industry for national production, the energy consumption of the iron and steel industry directly influences the GDP energy consumption of China, so that the energy saving is particularly important for the iron and steel production process, according to investigation, an iron making system accounts for 69.41 percent of the total energy consumption of the iron and steel production, wherein the energy consumption of a sintering process accounts for about 9 to 12 percent of the total energy consumption of the whole iron and steel enterprise, and is only next to the iron making process. In the sintering process, the waste heat resources mainly comprise two parts: firstly, sensible heat of red sinter in the sintering process is 350-420 ℃ at the temperature of exhaust gas at the high-temperature section of a cooling machine; secondly, sensible heat of sintering flue gas is generated in the sintering process, the temperature of exhaust gas discharged from a high-temperature section of a tail air box of the sintering machine is 300-380 ℃, about 50% of heat energy is discharged into the atmosphere in the form of sensible heat of the sintering flue gas and the exhaust gas of the cooling machine in the whole sintering production process, so that a large amount of waste heat is lost and wasted, the environment is polluted, and in order to avoid energy waste and environmental pollution, the waste heat in the sintering flue gas needs to be recovered and utilized before the high-temperature flue gas of the sintering machine is discharged.
At present, the following problems still exist in the waste heat recycling process of high-temperature flue gas of a sintering machine: firstly, in the production process of the sintering machine, the fluctuation of the temperature and the quantity of the generated flue gas is large, and the temperature and the quantity of the flue gas entering the waste heat boiler often cannot reach the designed values, so that the waste heat boiler cannot normally operate; secondly, when the flue gas is recycled, the high-temperature flue gas at the rear part of the sintering section flue and the high-temperature flue gas at the front part of the cooling section flue are effectively recycled, but the flue gas with relatively low temperature at the front part of the sintering section flue and the rear part of the cooling section flue is not utilized, so that the problem of large heat waste still exists; thirdly, because the flue gas temperature at the front part of the sintering section flue and the rear part of the cooling section flue is relatively low, the phenomenon of condensation often occurs, so that sulfur dioxide in the flue gas causes serious corrosion to the flue, and the service life of the flue is shortened. Therefore, it is objectively needed to develop a waste heat utilization device of sintering machine high-temperature flue gas, which is convenient to operate, has a waste heat boiler capable of stably running and has high waste heat utilization rate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a convenient operation, exhaust-heat boiler can the steady operation, the waste heat utilization equipment of sintering machine high temperature flue gas that waste heat utilization rate is high.
The utility model aims at realizing the method, which comprises a sintering machine, a sintering section flue, a cooling section flue and a waste heat boiler, wherein one side of the sintering machine is provided with a regulator, the middle part in the regulator is provided with a horizontal clapboard which divides the inner space of the regulator into a temperature regulating chamber and a gas storage chamber, the temperature regulating chamber is internally provided with an inner barrel which divides the temperature regulating chamber into the temperature regulating chamber and a mixing chamber which are communicated, a heating element is arranged in the temperature regulating chamber, the center of the horizontal clapboard is provided with an air vent which is communicated with the mixing chamber and the gas storage chamber, the high temperature sections of the sintering section flue and the cooling section flue are respectively communicated with the mixing chamber through a communicating pipe, the outer sides of the low temperature sections of the sintering section flue and the cooling section flue are provided with a jacket, a communicating hole is processed on the corresponding flue side wall in the jacket, one side of the jacket is communicated with the corresponding communicating pipe through an air pipe, the corresponding flue in the other side of the jacket is communicated with the temperature regulating chamber through an air supply pipe, the gas storage chamber is communicated with the waste heat boiler through a pipeline.
Furthermore, a down pipe is arranged at the position of the vent hole, and a gate valve is arranged on the down pipe.
Further, a stirrer is arranged in the mixing chamber.
Furthermore, a spiral ring plate is arranged in the temperature adjusting chamber, the air supply pipe is communicated with the bottom of the temperature adjusting chamber, and an air inlet hole communicated with the temperature adjusting chamber and the mixing chamber is processed at the upper part of the inner cylinder.
Furthermore, temperature sensors are arranged in the temperature adjusting chamber, the mixing chamber and the air storage chamber.
Furthermore, a dry dust collector is arranged on a pipeline between the air storage chamber and the waste heat boiler.
Furthermore, a smoke outlet of the waste heat boiler is sequentially connected with a smoke treatment device and a chimney.
Further, a steam outlet of the waste heat boiler is connected with a steam turbine.
Furthermore, one side of the regulator is provided with an exhaust fan, and an air outlet of the exhaust fan is communicated with the bottom of the temperature adjusting chamber through a pipeline.
The utility model discloses when using, the mixing chamber of some entering regulators of high temperature section flue gas of sintering section flue and cooling zone flue, the low temperature section that another part got into sintering section flue and cooling zone flue presss from both sides the cover, sneak into the low temperature flue gas again, heat the low temperature flue gas, promote the temperature of low temperature flue gas, both can avoid the low temperature flue gas dewfall phenomenon to appear, can also carry out the primary heating to the low temperature flue gas, the low temperature flue gas after the primary heating lets in the temperature regulation room, if the temperature still can not reach the requirement, then start heating element, once more heat up, the low temperature flue gas after the intensification gets into the mixing chamber, various flue gases mix in the mixing chamber, after the temperature of average mixed flue gas, the mixed flue gas lets in the gas receiver, the flue gas that temperature and atmospheric pressure are stable lets in exhaust-heat boiler from the gas receiver, guarantee that exhaust-heat boiler can steady operation. In the process, the temperature of the flue gas is regulated through the regulator to obtain the flue gas with relatively stable temperature and pressure, so that the normal operation of the waste heat boiler is ensured; secondly, only a small amount of energy is consumed to heat the low-temperature section flue gas of the sintering section flue and the cooling section flue, and the low-temperature flue gas can be recycled, so that the utilization rate of the flue gas waste heat is greatly improved in general; finally, after the flue gas at the low-temperature sections of the sintering section flue and the cooling section flue is heated, the condensation phenomenon is avoided, the corrosion of sulfur dioxide in the flue gas to the flue is prevented, and the service life of the flue is prolonged. The utility model discloses convenient operation, exhaust-heat boiler can the steady operation, and waste heat utilization rate is high, has apparent economic value and social value.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1-sintering machine, 2-sintering section flue, 3-cooling section flue, 4-waste heat boiler, 5-downcomer, 6-regulator, 7-horizontal partition board, 8-gas storage chamber, 9-inner cylinder, 10-temperature regulating chamber, 11-mixing chamber, 12-heating element, 13-stirrer, 14-communicating pipe, 15-jacket, 16-gas supply pipe, 17-gas supply pipe, 18-spiral ring plate, 19-temperature sensor, 20-dry dust remover, 21-flue gas processing device, 22-chimney, 23-steam turbine and 24-exhaust fan.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.
As shown in figure 1, the utility model comprises a sintering machine 1, a sintering section flue 2, a cooling section flue 3 and a waste heat boiler 4, wherein the sintering machine 1, the sintering section flue 2, the cooling section flue 3 and the waste heat boiler 4 are all of the prior structure, the waste heat boiler 4 is used for recovering heat in the flue gas of the sintering machine 1 and producing steam, one side of the sintering machine 1 is provided with a regulator 6, the middle part in the regulator 6 is provided with a horizontal clapboard 7, the horizontal clapboard 7 divides the inner space of the regulator 6 into a temperature regulating room and a gas storage chamber 8, an inner cylinder 9 is arranged in the temperature regulating room, the temperature regulating room is divided into a temperature regulating room 10 and a mixing room 11 which are communicated by the inner cylinder 9, a heating element 12 is arranged in the temperature regulating room 10, the center of the horizontal clapboard 7 is provided with a vent hole which is communicated with the mixing room 11 and the gas storage chamber 8, the high temperature sections of the sintering section flue 2 and the cooling section flue 3 are respectively communicated with the mixing room 11 through a communicating pipe 14, the low temperature section outside of sintering section flue 2 and cooling zone flue 3 is provided with presss from both sides cover 15, it has the intercommunicating pore to process on pressing from both sides corresponding flue lateral wall in cover 15, press from both sides one side of cover 15 and communicate with corresponding communicating pipe 14 through gas-supply pipe 17, corresponding flue passes through gas supply pipe 16 and temperature regulating room 10 intercommunication in pressing from both sides cover 15's the opposite side, pass through the pipeline intercommunication between gas receiver 8 and the exhaust-heat boiler 4, during the in-service use, gas receiver 8 is a closed area pressure cavity, the flue gas has comparatively stable temperature and pressure in gas receiver 8, can be for the stable and transport high temperature flue gas that lasts of exhaust-heat boiler 4, guarantee that exhaust-heat boiler 4 can long-term normal operating, stop to cause the problem that exhaust-heat boiler 4 can not normal operating because of flue gas temperature and volume fluctuation.
When the utility model is used, one part of the high-temperature section flue gas of the sintering section flue 2 and the cooling section flue 3 enters the mixing chamber 11 of the regulator 6, the other part of the high-temperature section flue gas enters the low-temperature section jacket 15 of the sintering section flue 2 and the cooling section flue 3, and then the low-temperature flue gas is mixed, the low-temperature flue gas is heated to improve the temperature of the low-temperature flue gas, so that the condensation phenomenon of the low-temperature flue gas can be avoided, the low-temperature flue gas can be preliminarily heated, the preliminarily heated low-temperature flue gas is introduced into the temperature-regulating chamber 10, and if the temperature does not meet the requirement, the heating element 12 is started, the temperature is raised again, the low-temperature flue gas after temperature rise enters the mixing chamber 11, various flue gases are mixed in the mixing chamber 11, after the temperature of the mixed flue gas is averaged, the mixed flue gas is introduced into the gas storage chamber 8, and the flue gas with stable temperature and air pressure is introduced into the waste heat boiler 4 from the gas storage chamber 8, so that the waste heat boiler 4 can be stably operated. In the process, the temperature of the flue gas is regulated by the regulator 6 to obtain the flue gas with relatively stable temperature and pressure, so that the normal operation of the waste heat boiler 4 is ensured; secondly, only a small amount of energy is consumed to heat the low-temperature section flue gas of the sintering section flue 2 and the cooling section flue 3, and the low-temperature flue gas can be recycled, so that the utilization rate of the flue gas waste heat is greatly improved in general; finally, after the low-temperature section flue gas of the sintering section flue 2 and the cooling section flue 3 is heated, the condensation phenomenon is avoided, the corrosion of sulfur dioxide in the flue gas to the flue is prevented, and the service life of the flue is prolonged.
The descending pipe 5 is arranged at the position of the vent hole, the gate valve is arranged on the descending pipe 5, when the gas storage device operates, the gate valve can be closed discontinuously, so that various kinds of flue gas can be mixed in the mixing chamber 11 in sufficient time, after the flue gas is fully mixed, the gate valve is opened, and the flue gas enters the gas storage chamber 8 through the descending pipe 5.
The stirrer 13 is arranged in the mixing chamber 11, and the stirrer 13 is of an existing structure and can stir various kinds of flue gas entering the mixing chamber 11, so that the various kinds of flue gas can be promoted to flow and be fully mixed, and the purpose of average temperature is achieved.
The temperature adjusting chamber 10 is internally provided with a spiral ring plate 18, the gas supply pipe 16 is communicated with the bottom of the temperature adjusting chamber 10, the upper part of the inner cylinder 9 is provided with a gas inlet hole communicated with the temperature adjusting chamber 10 and the mixing chamber 11, the spiral ring plate 18 is arranged to enable the space in the temperature adjusting chamber 10 to form a spiral channel, flue gas flows along the spiral channel after entering the temperature adjusting chamber 10 and is heated by the heating element 12 in the flowing process, the flowing distance and time of the flue gas in the temperature adjusting chamber 10 are increased through the arrangement of the spiral ring plate 18, and the flue gas is sufficiently heated.
In order to facilitate the control of the temperature of the flue gas in each chamber of the regulator 6, temperature sensors 19 are arranged in the temperature regulating chamber 10, the mixing chamber 11 and the gas storage chamber 8.
Be provided with dry dust collector 20 on the pipeline between gas receiver 8 and exhaust-heat boiler 4, dry dust collector 20 is existing equipment, can use cyclone during in-service use, detach impurity such as dust particle in the flue gas through dry dust collector 20, prevent that impurity such as dust particle from getting into exhaust-heat boiler 4, cause the jam of exhaust-heat boiler 4 or follow-up pipeline, and simultaneously, also can prevent on the heat exchange tube of dust particle adhesion in exhaust-heat boiler 4, avoid heat exchange efficiency's reduction.
The flue gas outlet of the waste heat boiler 4 is sequentially connected with a flue gas treatment device 21 and a chimney 22, the flue gas treatment device 21 is an existing device, generally comprises equipment such as desulfurization, denitrification, dust removal and purification, and can purify the flue gas discharged from the waste heat boiler 4, so that the flue gas can meet the emission requirement and is discharged through the chimney 22.
The steam outlet of the waste heat boiler 4 is connected with a steam turbine 23, steam is introduced into the steam turbine 23, the steam turbine 23 does work, a pump, a fan or a compressor can be driven to operate, and a main shaft of a generator can also be driven to rotate to generate power.
One side of regulator 6 is provided with air exhauster 24, air outlet of air exhauster 24 passes through the pipeline and communicates with the bottom of temperature regulating room 10, because the flue gas temperature that sintering machine 1 produced floats great, when the flue gas temperature is higher, when exceeding service temperature, air exhauster 24 can be opened, air exhauster 24 can extract cold air entering regulator 6 on every side, reduce the flue gas temperature after mixing with the high temperature flue gas, this kind of mode can be when guaranteeing exhaust-heat boiler 4 normal operating, suitably reduce the flue gas temperature, simultaneously because the introduction of cold air, the total amount of flue gas has still been increased, the utilization efficiency of flue gas has been improved.
Claims (9)
1. A device for utilizing waste heat of high-temperature flue gas of a sintering machine comprises the sintering machine (1), a sintering section flue (2), a cooling section flue (3) and a waste heat boiler (4), and is characterized in that a regulator (6) is arranged on one side of the sintering machine (1), a horizontal partition plate (7) is arranged in the middle of the regulator (6), the horizontal partition plate (7) divides the inner space of the regulator (6) into a temperature regulating chamber and a gas storage chamber (8), an inner cylinder (9) is arranged in the temperature regulating chamber, the temperature regulating chamber is divided into the communicated temperature regulating chamber (10) and a mixing chamber (11) by the inner cylinder (9), a heating element (12) is arranged in the temperature regulating chamber (10), vent holes communicated with the mixing chamber (11) and the gas storage chamber (8) are processed in the center of the horizontal partition plate (7), the high-temperature sections of the sintering section flue (2) and the cooling section flue (3) are respectively communicated with the mixing chamber (11) through a communicating pipe (14), the low-temperature section outer sides of the sintering section flue (2) and the cooling section flue (3) are provided with a jacket (15), communicating holes are processed on the side wall of the flue in the jacket (15), one side of the jacket (15) is communicated with a corresponding communicating pipe (14) through a gas conveying pipe (17), the flue in the other side of the jacket (15) is communicated with a temperature adjusting chamber (10) through a gas supply pipe (16), and the gas storage chamber (8) is communicated with the waste heat boiler (4) through a pipeline.
2. The device for utilizing the residual heat of the high-temperature flue gas of the sintering machine according to claim 1, characterized in that a downcomer (5) is arranged at the vent hole, and a gate valve is arranged on the downcomer (5).
3. The device for utilizing the residual heat of the high-temperature flue gas of the sintering machine according to claim 1, characterized in that a stirrer (13) is arranged in the mixing chamber (11).
4. The device for utilizing the residual heat of the high-temperature flue gas of the sintering machine as claimed in claim 1, wherein a spiral ring plate (18) is arranged in the temperature adjusting chamber (10), the gas supply pipe (16) is communicated with the bottom of the temperature adjusting chamber (10), and an air inlet hole for communicating the temperature adjusting chamber (10) with the mixing chamber (11) is formed in the upper part of the inner cylinder (9).
5. The device for utilizing the waste heat of the high-temperature flue gas of the sintering machine according to claim 1, wherein temperature sensors (19) are arranged in the temperature adjusting chamber (10), the mixing chamber (11) and the gas storage chamber (8).
6. The device for utilizing the residual heat of the high-temperature flue gas of the sintering machine according to claim 1, characterized in that a dry type dust remover (20) is arranged on a pipeline between the gas storage chamber (8) and the residual heat boiler (4).
7. The device for utilizing the residual heat of the high-temperature flue gas of the sintering machine according to claim 1, characterized in that a flue gas treatment device (21) and a chimney (22) are sequentially connected to a flue gas outlet of the residual heat boiler (4).
8. The device for utilizing the residual heat of the high-temperature flue gas of the sintering machine according to claim 1, characterized in that a steam outlet of the residual heat boiler (4) is connected with a steam turbine (23).
9. The device for utilizing the waste heat of the high-temperature flue gas of the sintering machine according to claim 1, characterized in that an exhaust fan (24) is arranged at one side of the regulator (6), and an air outlet of the exhaust fan (24) is communicated with the bottom of the temperature regulating chamber (10) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220546558.XU CN217236491U (en) | 2022-03-14 | 2022-03-14 | Waste heat utilization equipment of sintering machine high temperature flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220546558.XU CN217236491U (en) | 2022-03-14 | 2022-03-14 | Waste heat utilization equipment of sintering machine high temperature flue gas |
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| Publication Number | Publication Date |
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| CN217236491U true CN217236491U (en) | 2022-08-19 |
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| CN202220546558.XU Active CN217236491U (en) | 2022-03-14 | 2022-03-14 | Waste heat utilization equipment of sintering machine high temperature flue gas |
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| CN (1) | CN217236491U (en) |
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2022
- 2022-03-14 CN CN202220546558.XU patent/CN217236491U/en active Active
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