CN212548952U - Sintering machine head flue gas desulfurization and denitrification treatment device - Google Patents
Sintering machine head flue gas desulfurization and denitrification treatment device Download PDFInfo
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- CN212548952U CN212548952U CN202020194008.7U CN202020194008U CN212548952U CN 212548952 U CN212548952 U CN 212548952U CN 202020194008 U CN202020194008 U CN 202020194008U CN 212548952 U CN212548952 U CN 212548952U
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Abstract
The utility model discloses a sintering machine aircraft nose flue gas desulfurization denitration treatment device, it is including the dry desulfurization tower that communicates in proper order, the sack cleaner, GGH gas heater, low temperature catalyst SCR reactor, frequency conversion fan and chimney, be provided with first input on the GGH gas heater, first output, second input and second output, the air-out end and the first input of sack cleaner are linked together, first output communicates with the inlet end of low temperature catalyst SCR reactor mutually, the end of giving vent to anger of low temperature catalyst SCR reactor is linked together with the second input, the second output is linked together with the frequency conversion fan. The utility model discloses with the combined use of dry process desulfurization technique and low temperature SCR catalyst, improve the stability of system, avoid the too much consumption of desulfurizer to and reduce the consumption of heating fuel.
Description
Technical Field
The utility model relates to a flue gas treatment environmental protection equipment field especially relates to a sintering machine aircraft nose flue gas desulfurization denitration treatment device.
Background
The smoke pollutants of the head of the sintering machine are important pollutant sources in metallurgical waste gas, in recent years, the nation pays particular attention to the pollutant treatment in the field of metallurgy, sulfur oxides, nitrogen oxides, particulate matters and the like are generated in the production process of the sintering machine, the environment of our life is seriously harmed, and the problems of acid rain, haze and the like are frequent. In order to deal with the environmental impact caused by the production of the sintering machine, the national environmental protection department promulgates the guide standard of the flue gas treatment of the head of the sintering machine, wherein the treatment requirement is further strict, and the denitration requirement is also mentioned. The guide standard makes clear requirements on the emission concentration of the smoke pollutants of the head of the sintering machine, wherein an ultra-low emission limit value is implemented on an environment sensitive area, namely NOx in smoke is less than 50mg/m3、SO2＜35mg/m3The particle is less than 10mg/m3。
Complicated fluctuation of working conditions of the sintering machine and most SO2At 1500-3The NOx concentration is 200-450mg/Nm3The concentration of the particulate matter is 100-200mg/Nm3The temperature is between 110 ℃ and 180 ℃. In accordance with the ultra-low emission requirements of the regulatory emission standards,at present, the treatment process routes proposed at home and abroad are more, and the process is generally divided into an integrated process and a FGD + SCR combined process. The related technology of the published information refers to a high-temperature SCR denitration technology and a plurality of dry desulfurization technologies in use, a large amount of blast furnace gas and other fuel gas need to be consumed, the operation cost is increased, meanwhile, the consumption of a desulfurizing agent cannot be well controlled in the actual use of the dry desulfurization technology, the operation cost of the whole treatment device is also increased, and the related treatment device cannot well cope with the change of sintering working conditions, so that the conditions of unstable system operation and overhigh energy consumption occur.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome among the prior art not good and high energy consumption scheduling problem of system suitability, provide a use with the dry process desulfurization technique of regulatory function and the combination of low temperature SCR catalyst, improve the stability of system, avoid the excessive consumption of desulfurizer to and reduce the consumption of heating fuel.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a sintering machine aircraft nose flue gas desulfurization denitration treatment device, including dry desulfurization tower, sack cleaner, GGH gas heater, low temperature catalyst SCR reactor, variable frequency fan and the chimney that communicates in proper order, the upper portion and the lower part of dry desulfurization tower are provided with flue gas inlet and exhanst gas outlet respectively, flue gas inlet communicates through the end of giving vent to anger of pipeline with the sintering machine aircraft nose, exhanst gas outlet with the air inlet end of sack cleaner communicates, be connected with confession desulfurizer system between the upper portion and the lower part of dry desulfurization tower, be provided with first input, first output, second input and second output on the GGH gas heater, the air-out end of sack cleaner is linked together with first input, first output with the end of giving vent to anger of low temperature catalyst SCR reactor communicates with the second input, the second output end is communicated with the variable frequency fan.
Preferably, a flue gas heating device and a denitration reducing agent supply system are sequentially arranged at the gas inlet end of the low-temperature catalyst SCR reactor along the flow direction of flue gas.
Preferably, a circulating fan is arranged on a pipeline between the bag-type dust collector and the first input end.
Preferably, a pipeline between the variable frequency fan and the chimney is also communicated with one end of a circulating air pipeline, and the other end of the circulating air pipeline is communicated with a pipeline between the flue gas inlet and the gas outlet end of the sintering machine head.
Preferably, a flue gas stop valve is arranged on a pipeline between the flue gas inlet and the gas outlet end of the sintering machine head.
Preferably, the circulating air pipeline is provided with the flue gas stop valve.
Preferably, the pipeline between the end of giving vent to anger of low temperature catalyst SCR reactor and the second input is provided with the secondary heating subassembly, the secondary heating subassembly is including temperature sensor, air heater and the air delivery fan that is used for detecting flue gas temperature in the pipeline, air heater's both ends respectively through the pipeline with low temperature catalyst SCR reactor with pipeline between the second input and air delivery fan are linked together, when temperature sensor detects that flue gas temperature is less than 180 ℃, air heater with the air delivery fan begins to work, when temperature sensor detects that flue gas temperature is higher than 200 ℃, air heater with the air delivery fan stops working.
The utility model also provides an use above-mentioned sintering machine aircraft nose flue gas desulfurization denitration treatment device's processing method, including following step:
flue gas at the head of the sintering machine firstly enters a dry desulfurization method for desulfurization, the desulfurized flue gas enters a bag-type dust collector for dust removal, the dedusted flue gas enters a GGH flue gas heat exchanger for temperature rise, the heated flue gas enters a low-temperature catalyst SCR reactor for denitration, the denitrated flue gas enters the GGH flue gas heat exchanger for temperature reduction, and the flue gas is discharged from the GGH flue gas heat exchanger, enters a chimney through a variable-frequency fan 5 and is discharged into the atmosphere.
The utility model discloses following beneficial effect has been gained for prior art:
the utility model provides an analysis sintering machine aircraft nose flue gas desulfurization denitration treatment device is in getting into the temperature that the flue gas was come to the sintering machine aircraft nose before the dry desulfurization tower, flue gas volumn and pollutant concentration, the flue gas volumn that advances the processing of tower and the desulfurization volume that newly drops into can be adjusted according to the data of analysis, the flue gas temperature that the control goes out the tower is above dew point temperature, majority control is between 75-80 ℃, adjust bed pressure and endless desulfurization ash volume, the at utmost reduces the desulfurization that newly drops into, reduce the unnecessary consumption of desulfurization, the SO of control export SO2The concentration was less than 35mg/Nm 3. The flue gas after passing through the dry desulfurization tower enters a bag-type dust remover, the ash material level of a bag-type ash bucket is effectively controlled according to the circulating ash amount, the stable and balanced running of circulating ash is ensured, and meanwhile, the concentration of particulate matters discharged from the dust remover is ensured to be lower than 10mg/Nm 3. The flue gas after dust removal needs to enter a flue gas heat exchanger system firstly to ensure that the heat exchange of the flue gas reaches 160-fold-180 ℃, and then flue gas is heated to 180-fold-200 ℃ by utilizing flue gas heating equipment to carry out denitration, the specific denitration temperature control can be adjusted and changed according to the actual working condition to ensure the stable operation of the denitration catalyst, and the concentration of NOx at the outlet is lower than 50mg/Nm3. The whole system can meet the performance requirement of ultralow emission in the latest guide standard, meanwhile, according to the failure experience in the existing engineering case, the treatment system can be effectively optimized and adjusted, the multifunctional adjustment of the system can be realized, the fluctuation change of the smoke volume can be adapted, the treatment function can be met between 30 and 110 percent of the smoke volume, meanwhile, the refined circulation volume adjustment and the ratio of newly-input desulfurization are realized, the desulfurization consumption is effectively reduced, and the condition that the Ca/S is too high is avoided. Reasonable flue gas heating and heat exchange system configuration to and the application of low temperature catalyst, the condition that the gas that appears in the case before can be avoided appearing excessively consumes, and the function of effectual realization denitration is simultaneously, has reduced the running cost of device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a process flow diagram of the flue gas desulfurization and denitrification treatment device for the head of the sintering machine of the utility model;
wherein, 1, a dry desulfurization tower; 2. a bag-type dust collector; 3, GGH flue gas heat exchanger; 4. a low temperature catalyst SCR reactor; 5. a variable frequency fan; 6. a chimney; 7. a desulfurizing agent supply system; 8. a denitration reducing agent supply system; 9. flue gas heating equipment; 10. flue gas trip valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
An object of the utility model is to overcome among the prior art not good and high energy consumption scheduling problem of system suitability, provide a use with the dry process desulfurization technique of regulatory function and the combination of low temperature SCR catalyst, improve the stability of system, avoid the excessive consumption of desulfurizer to and reduce the consumption of heating fuel.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in figure 1, the utility model provides a flue gas desulfurization and denitration treatment device for a sintering machine head, which comprises a dry desulfurization tower 1, a bag-type dust remover 2, a GGH flue gas heat exchanger 3, a low-temperature catalyst SCR reactor 4, a variable frequency fan 5 and a chimney 6 which are sequentially communicated, wherein the upper part and the lower part of the dry desulfurization tower 1 are respectively provided with a flue gas inlet and a flue gas outlet, the flue gas inlet is communicated with the gas outlet end of the sintering machine head through a pipeline, the flue gas outlet is communicated with the gas inlet end of the bag-type dust remover 2, the upper part and the lower part of the dry desulfurization tower 1 are connected with a desulfurizer supply system 7, the GGH flue gas heat exchanger 3 is provided with a first input end, a first output end, a second input end and a second output end, the gas outlet end of the bag-type dust remover 2 is communicated with the first input end, the first output end is communicated with the gas inlet, the second output end is communicated with the variable frequency fan 5.
Wherein, low temperature catalyst SCR reactor 4 adopts low temperature catalyst, and then uses with GGH gas heater 3 cooperation, can avoid the condition that adopts the excessive consumption of the gas that high temperature catalyst appears in the previous case to appear, and the operation cost of device has been reduced to the function of effectual realization denitration simultaneously.
In order to reduce the gas consumption, the utility model discloses the inlet end department of well low temperature catalyst SCR reactor 4 has set gradually flue gas heating equipment 9 and denitration reductant supply system 8 along flue gas flow direction, be about to flue gas heating equipment 9 and GGH gas heater 3 and low temperature catalyst cooperation use, the condition of the too much consumption of the gas that further can avoid appearing in the previous case appears, the function of effectual realization denitration is simultaneously, the running cost of device has been reduced, wherein, flue gas heating equipment 9 is the device that exists among the prior art, do not do concrete description consequently, can only realize its heating function can.
In order to control the flue gas conveying amount conveniently, a circulating fan is arranged on a pipeline between the bag-type dust collector 2 and the first input end; further, the circulating fan is a variable-frequency fan.
In order to facilitate the regulation and get into the flue gas volume in the dry desulfurization tower 1, the utility model discloses pipeline between well frequency conversion fan 5 and the chimney 6 still is linked together with the one end of circulating air pipeline, and the other end of circulating air pipeline is linked together with the pipeline between the end of giving vent to anger of flue gas inlet and sintering machine aircraft nose.
The utility model discloses be provided with flue gas trip valve 10 on the pipeline between the end of giving vent to anger of well flue gas import and sintering machine aircraft nose.
The utility model discloses be provided with flue gas trip valve 10 on the well circulation wind pipeline.
In order to ensure that the flue gas discharged from the low-temperature catalyst SCR reactor has enough heat exchange temperature, the utility model discloses in the pipeline between the gas outlet end of the low-temperature catalyst SCR reactor and the second input end is provided with a secondary heating component, the secondary heating component comprises a temperature sensor for detecting the flue gas temperature in the pipeline, an air heater and an air conveying fan, the two ends of the air heater are respectively communicated with the pipeline between the low-temperature catalyst SCR reactor and the second input end and the air conveying fan through the pipeline, when the temperature sensor detects that the flue gas temperature is lower than 180 ℃, the air heater and the air conveying fan start to work, and when the temperature sensor detects that the flue gas temperature is higher than 200 ℃, the air heater and the air conveying fan stop working; the temperature sensor, the air heater and the air conveying fan are all parts existing in the prior art, and the specific models are not limited as long as the functions of the temperature sensor, the air heater and the air conveying fan can be realized by adapting to the working condition; in addition, the temperature sensor, the air heater and the air delivery fan are all connected with a controller, the controller is a simple existing electric device, and a control program of the controller is also existing and is similar to a comparator.
The utility model also provides an use above-mentioned sintering machine aircraft nose flue gas desulfurization denitration treatment device's processing method, including following step:
flue gas at the head of the sintering machine firstly enters a dry desulfurization method for desulfurization, the desulfurized flue gas enters a bag-type dust collector for dust removal, the dedusted flue gas enters a GGH flue gas heat exchanger for temperature rise, the heated flue gas enters a low-temperature catalyst SCR reactor for denitration, the denitrated flue gas enters the GGH flue gas heat exchanger for temperature reduction, and the flue gas is discharged from the GGH flue gas heat exchanger, enters a chimney through a variable-frequency fan 5 and is discharged into the atmosphere.
The technological process integrating the technical scheme disclosed above is as follows: the flue gas at the head of the sintering machine with the temperature of 110 plus 180 ℃ enters a dry desulfurization method for desulfurization, the flue gas at the temperature of 75-80 ℃ after desulfurization enters a bag-type dust collector 2 for dust removal, the flue gas after dust removal needs to enter a GGH flue gas heat exchanger 3 for temperature rise, the temperature of the flue gas is heated to 160 plus 180 ℃, the flue gas is heated by a flue gas heating device 9 to 10-20 ℃ and enters a denitration reactor for denitration, the flue gas with the temperature of 180 plus 200 ℃ after denitration needs to enter the GGH flue gas heat exchanger 3 as a heat source of the whole GGH flue gas heat exchanger 3, and the part of flue gas is discharged from the GGH flue gas heat exchanger 3, enters a chimney 6 through a variable frequency. The GGH flue gas heat exchanger 3 is provided with 2 input ports and 2 output ports which are respectively a cold end and a hot end of the GGH flue gas heat exchanger 3, a flue gas inlet at the cold end is low-temperature flue gas at 75-80 ℃ after dust removal, and flue gas at an outlet at the cold end is flue gas to be denitrated after heat exchange of a heat exchange system, and the temperature of the flue gas is 160-180 ℃. The hot end inlet of the GGH flue gas heat exchanger 3 is clean flue gas from the denitration reactor, the temperature of the clean flue gas is 180-200 ℃, and the outlet of the hot end is flue gas at about 100 ℃ after heat exchange. Wherein can be nimble have a flue gas firing equipment 9 can adjust the flue gas temperature of denitration in good time according to the operating mode condition, guarantee the technological needs of the stability of system and denitration. The circulating air pipeline arranged at the frequency conversion fan 5 is mainly used for adjusting the amount of flue gas entering the desulfurizing tower and meeting the process requirements of a desulfurizing system.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. The utility model provides a sintering machine aircraft nose flue gas SOx/NOx control processing apparatus which characterized in that: the device comprises a dry desulfurization tower, a bag-type dust remover, a GGH flue gas heat exchanger, a low-temperature catalyst SCR reactor, a variable frequency fan and a chimney which are sequentially communicated, wherein the upper part and the lower part of the dry desulfurization tower are respectively provided with a flue gas inlet and a flue gas outlet, the flue gas inlet is communicated with the gas outlet end of a head of a sintering machine through a pipeline, the flue gas outlet is communicated with the gas inlet end of the bag-type dust remover, the upper part and the lower part of the dry desulfurization tower are connected with a desulfurizer supply system, the GGH flue gas heat exchanger is provided with a first input end, a first output end, a second input end and a second output end, the gas outlet end of the bag-type dust remover is communicated with the first input end, the first output end is communicated with the gas inlet end of the low-temperature catalyst SCR reactor, and the gas, the second output end is communicated with the variable frequency fan.
2. The desulfurization and denitrification treatment device for the flue gas of the head of the sintering machine as claimed in claim 1, wherein: and a flue gas heating device and a denitration reducing agent supply system are sequentially arranged at the gas inlet end of the low-temperature catalyst SCR reactor along the flow direction of flue gas.
3. The desulfurization and denitrification treatment device for the flue gas of the head of the sintering machine as claimed in claim 2, wherein: and a circulating fan is arranged on a pipeline between the bag-type dust collector and the first input end.
4. The desulfurization and denitrification treatment device for the flue gas of the head of the sintering machine as claimed in claim 1 or 3, wherein: and the pipeline between the variable frequency fan and the chimney is also communicated with one end of a circulating air pipeline, and the other end of the circulating air pipeline is communicated with the pipeline between the flue gas inlet and the gas outlet end of the sintering machine head.
5. The desulfurization and denitrification treatment device for the flue gas of the head of the sintering machine as claimed in claim 4, wherein: and a flue gas stop valve is arranged on a pipeline between the flue gas inlet and the gas outlet end of the sintering machine head.
6. The desulfurization and denitrification treatment device for the flue gas of the head of the sintering machine as claimed in claim 5, wherein: the circulating air pipeline is provided with the flue gas stop valve.
7. The desulfurization and denitrification treatment device for the flue gas of the handpiece of the sintering machine as claimed in claim 6, wherein: the pipeline between the end of giving vent to anger of low temperature catalyst SCR reactor with the second input is provided with secondary heating subassembly, secondary heating subassembly is including temperature sensor, air heater and the air conveying fan that is used for detecting flue gas temperature in the pipeline, air heater's both ends respectively through the pipeline with low temperature catalyst SCR reactor with pipeline between the second input and the air conveying fan is linked together, works as when temperature sensor detects flue gas temperature and is less than 180 ℃, air heater with the air conveying fan begins to work, works as when temperature sensor detects flue gas temperature and is higher than 200 ℃, air heater with the air conveying fan stops work.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151108A (en) * | 2020-02-21 | 2020-05-15 | 中冶大地工程咨询有限公司 | Sintering machine head flue gas desulfurization and denitrification treatment device and treatment method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111151108A (en) * | 2020-02-21 | 2020-05-15 | 中冶大地工程咨询有限公司 | Sintering machine head flue gas desulfurization and denitrification treatment device and treatment method thereof |
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