CN211514084U - Grate rotary kiln middle section SCR deNOx systems and temperature compensating device thereof - Google Patents
Grate rotary kiln middle section SCR deNOx systems and temperature compensating device thereof Download PDFInfo
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- CN211514084U CN211514084U CN201922319897.5U CN201922319897U CN211514084U CN 211514084 U CN211514084 U CN 211514084U CN 201922319897 U CN201922319897 U CN 201922319897U CN 211514084 U CN211514084 U CN 211514084U
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- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000000779 smoke Substances 0.000 claims abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 77
- 239000003546 flue gas Substances 0.000 claims description 77
- 238000001816 cooling Methods 0.000 claims description 21
- 230000001172 regenerating effect Effects 0.000 claims description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003345 natural gas Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000003303 reheating Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- -1 boilers and the like Chemical compound 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model provides a chain grate rotary kiln middle section SCR deNOx systems and temperature compensating device thereof, temperature compensating device includes: the temperature compensation pipeline is used for being communicated with a pipeline provided with the SCR denitration reactor and is connected to the inlet side of the SCR denitration reactor; and the heat source component is connected with the temperature compensation pipeline and used for outputting heat source smoke. The utility model provides a drying grate rotary kiln middle section SCR deNOx systems's temperature compensation arrangement, very big reduction natural gas and the consumption of electric quantity, the cost is effectively reduced to SCR deNOx systems's steady operation has been ensured.
Description
Technical Field
The utility model relates to a denitration device technical field, in particular to grate rotary kiln middle section SCR deNOx systems and temperature compensating device thereof.
Background
Letter of 'request for proposal of ultra-low emission modification work plan (request for proposal of opinion)' issued by national ecological environment department of 7.5.2018 (environmental letter of atmosphere)<2018>No. 242) ". The requirement is that new (including relocation) steel projects all reach ultra-low emission levels. By 10 months before 2020, iron and steel enterprises with modification conditions in major areas for atmosphere pollution control such as Long triangular basically complete ultralow emission modification, wherein the requirements are as follows: NOxThe discharge concentration is less than 50mg/Nm3. However, the current grate rotary kiln NOxThe emission is generally 350mg/Nm3Therefore, the flue gas denitration modification work is urgently needed.
In the practical application of the current rotary kiln flue gas denitration system of the chain grate machine, two feasible technical routes are respectively a rotary kiln tail SCR denitration technology of the chain grate machine and a rotary kiln middle section SCR denitration technology of the chain grate machine.
The SCR denitration technology at the tail part of the rotary kiln of the chain grate machine is a technical route for carrying out flue gas denitration by arranging a medium-low temperature or medium-temperature SCR denitration reactor behind a desulfurization tower, and because the flue gas temperature at the position is low (generally below 110 ℃), and the temperature does not reach the reaction temperature interval of a medium-low temperature and medium-temperature SCR denitration catalyst (the reaction temperature interval of the medium-low temperature SCR denitration catalyst is 180-260 ℃, and the reaction temperature interval of the medium-temperature SCR denitration catalyst is 280-400 ℃), the flue gas is heated by consuming natural gas until the flue gas is heated to the reaction temperature interval of a corresponding catalyst, and the denitration reaction can not be finished. Taking the annual production line of 300 ten thousand tons of pellet grate rotary kilns as an example, the main consumption cost of natural gas, electric quantity and the like is about 4000 ten thousand RMB each year when the SCR denitration technology at the tail part of the grate rotary kiln is adopted, so the operation cost of the SCR denitration technology line at the tail part of the grate rotary kiln is huge, and the economic performance is poor, so that the large-scale popularization is difficult.
As shown in fig. 1, the SCR denitration technology of the middle section of the rotary kiln of the grate machine is a technical route that SCR denitration reactors (a first SCR denitration reactor 10, a second SCR denitration reactor 11 and a third SCR denitration reactor 12) are respectively distributed on the outlet of two heat-returning blowers (a first heat-returning blower 21 and a second heat-returning blower 22) and the outlet flue of the preheating section i 103 of the grate machine 100, and the technical route is a feasible scheme for denitration in the middle link of the whole flue gas flow of the rotary kiln of the grate machine, because the flue gas temperature in the middle link of the flue gas flow of the rotary kiln of the grate machine is higher than the flue gas temperature at the tail of the rotary kiln of the grate machine, the flue gas temperature compensation amount is relatively less, taking a rotary kiln production line of 300 ten thousand tons of pellet grate machine produced annually as an example, the cost of operation is about 750 ten thousand RMB annually when the SCR technology of the middle section of the rotary kiln of the grate machine is adopted, and is far lower than the cost of the SCR denitration technology, good economical efficiency and suitable popularization.
However, because the fluctuation of the flue gas temperature at the inlet of the middle section SCR denitration system of the grate rotary kiln is large when the running loads are different, full-load denitration cannot be realized due to the fact that the flue gas temperature is lower than the reaction temperature range of the SCR catalyst, and a series of adverse conditions that the catalyst is blocked by ammonium bisulfate formed at low temperature and the like easily occur at the low flue gas temperature, so that the normal use of the SCR denitration system is seriously influenced.
Therefore, how to reduce the cost and ensure the stable operation of the SCR denitration system has become an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a drying grate rotary kiln middle section SCR deNOx systems's temperature-compensated equipment to reduce cost ensures SCR deNOx systems's steady operation. The utility model also provides a chain grate rotary kiln middle section SCR deNOx systems.
A temperature compensation device of chain grate rotary kiln middle section SCR deNOx systems includes:
the temperature compensation pipeline is used for being communicated with a pipeline provided with the SCR denitration reactor and is connected to the inlet side of the SCR denitration reactor;
and the heat source component is connected with the temperature compensation pipeline and used for outputting heat source smoke.
Optionally, in the temperature compensation device, the pipeline provided with the SCR denitration reactor includes: a backheating flue for communicating the preheating section II of the chain grate machine with the drying section of the chain grate machine, and a preheating section I outlet pipeline for communicating the preheating section I of the chain grate machine with a chimney;
the number of the temperature compensation pipelines is multiple and is respectively connected with the heat return flue and the outlet pipeline of the preheating I section in a one-to-one correspondence mode.
Optionally, in the above temperature compensation device, the temperature compensation duct is used for connecting to an inlet side of a regenerative fan on a regenerative flue of the drying section of the grate.
Optionally, in the temperature compensation device, the temperature compensation pipe has:
the switching device is used for controlling the on-off of the temperature compensation pipeline;
and the adjusting device is used for adjusting the flue gas flow of the temperature compensation pipeline.
The utility model also provides a chain grate rotary kiln middle section SCR deNOx systems, a serial communication port, include as above-mentioned arbitrary temperature compensating device.
Optionally, in the SCR denitration system at the middle section of the rotary kiln of the chain grate, the heat source component is a preheating section ii of the chain grate;
the temperature compensation pipeline is communicated with the upper part of the preheating section II and outputs the upper hot flue gas of the preheating section II to the pipeline provided with the SCR denitration reactor.
Optionally, in the SCR denitration system at the middle section of the rotary kiln of the grate, the heat source component is a hot air pipe at the ring cooling section ii, which is arranged between the ring cooling section ii of the ring cooling machine and the preheating section i of the grate;
and the temperature compensation pipeline is communicated with the annular cooling II-section hot air pipeline and outputs hot flue gas in the annular cooling II-section hot air pipeline to the pipeline provided with the SCR denitration reactor.
Optionally, in the SCR denitration system at the middle section of the rotary kiln of the grate, the heat source component is an external heat source flue gas device;
the temperature compensation pipeline is communicated with a hot flue gas outlet of the external heat source flue gas equipment and outputs hot flue gas output by the external heat source flue gas equipment to the pipeline provided with the SCR denitration reactor.
Optionally, in the SCR denitration system at the middle section of the rotary kiln of the grate, the external heat source flue gas device is a hot blast stove.
Optionally, in the SCR denitration system at the middle section of the rotary kiln of the chain grate, the heat source component is a preheating section i of the chain grate;
the temperature compensation pipeline is communicated with the upper part of the preheating section I, and outputs the upper hot flue gas of the preheating section I to the pipeline provided with the SCR denitration reactor.
According to the technical scheme, the utility model provides a drying grate rotary kiln middle section SCR deNOx systems's temperature compensation device, through setting up heat source fume device, directly carry the heat source flue gas of heat source part output to the pipeline that is provided with SCR denitration reactor through the temperature compensation pipeline in, and, original flue gas in the pipeline that should be provided with SCR deNOx reactors is mixed with the heat source flue gas and is carried to SCR deNOx reactors in by the import of SCR deNOx reactors again and react, thereby realized drying grate rotary kiln middle section SCR deNOx systems's flue gas temperature compensation, satisfy the temperature requirement of SCR deNOx reactors to the flue gas. The embodiment of the utility model provides a temperature compensation device, very big reduction natural gas and the consumption of electric quantity, the effective cost is reduced to SCR deNOx systems's steady operation has been ensured.
The utility model also provides a chain grate rotary kiln middle section SCR deNOx systems, because above-mentioned temperature compensation arrangement has above-mentioned technological effect, above-mentioned chain grate rotary kiln middle section SCR deNOx systems also should have same ground technological effect, no longer tired up one by one here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a SCR denitration system at the middle section of a rotary kiln of a chain grate machine in the prior art;
fig. 2 is a schematic structural diagram of an SCR denitration system at a middle section of a rotary kiln of a first grate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an SCR denitration system at a middle section of a rotary kiln of a second grate according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an SCR denitration system at a middle section of a rotary kiln of a third grate according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a fourth grate rotary kiln middle section SCR denitration system provided by the embodiment of the present invention.
Detailed Description
The utility model discloses a drying grate rotary kiln middle section SCR deNOx systems's temperature compensation arrangement to reduce cost ensures SCR deNOx systems's steady operation. The utility model also provides a chain grate rotary kiln middle section SCR deNOx systems.
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.
Referring to fig. 2-4, an embodiment of the present invention provides a temperature compensation device for a middle section SCR denitration system of a rotary kiln of a chain grate machine, including a temperature compensation pipeline and a heat source component. The temperature compensation pipeline is used for being communicated with a pipeline provided with the SCR denitration reactor and is connected to the inlet side of the SCR denitration reactor; the heat source component is connected with the temperature compensation pipeline and used for outputting heat source flue gas.
The embodiment of the utility model provides a drying grate rotary kiln middle section SCR deNOx systems's temperature compensation arrangement, through setting up heat source flue gas device, directly pass through the temperature compensation pipe transportation with the heat source flue gas of heat source part output to the pipeline that is provided with SCR denitration reactor, and, original flue gas in the pipeline that should be provided with SCR denitration reactor is mixed with the heat source flue gas and is carried to SCR denitration reactor in by the import of SCR denitration reactor again and react, thereby drying grate rotary kiln middle section SCR deNOx systems's flue gas temperature compensation has been realized, satisfy the temperature requirement of SCR deNOx reactors to the flue gas. The embodiment of the utility model provides a temperature compensation device, very big reduction natural gas and the consumption of electric quantity, the effective cost is reduced to SCR deNOx systems's steady operation has been ensured.
In this embodiment, the pipeline that is provided with SCR denitration reactor includes: a preheating I section 103 of the chain grate 100 and a preheating I section outlet pipeline 13 of the chimney 400, and a first reheating flue 14 and a second reheating flue 15 which are communicated with a preheating II section 104 of the chain grate 100 and a drying section 102 of the chain grate 100. The number of the temperature compensation pipelines is three, and the three temperature compensation pipelines are respectively a first temperature compensation pipeline 1, a second temperature compensation pipeline 2 and a third temperature compensation pipeline 3. The first temperature compensation pipeline 1 is connected with a heat source part and a preheating I-section outlet pipeline 13, the second temperature compensation pipeline 2 is connected with the heat source part and a first regenerative flue 14, and the third temperature compensation pipeline 3 is connected with the heat source part and a second regenerative flue 15. Through the connection form of respective one-to-one correspondence, the mutual influence of temperature compensation hot flue gas among the preheating I section outlet pipeline 13, the first reheating flue 14 and the second reheating flue 15 is avoided, the effect of adjusting the air supplement condition of the preheating I section outlet pipeline 13, the first reheating flue 14 and the second reheating flue 15 respectively according to specific conditions can be realized, the temperature compensation precision is effectively improved, and the stable operation of the SCR denitration system is further improved.
Wherein, preheat and be provided with first SCR denitration reactor 10 on I section outlet duct 13, be provided with second SCR denitration reactor 11 on the first flue 14 that returns, be provided with third SCR denitration reactor 12 on the second flue 15 that returns.
In the embodiment with other numbers of pipelines provided with the SCR denitration reactors, the number of the temperature compensation pipelines may be other numbers, and it is only necessary to ensure that the two pipelines are connected in one-to-one correspondence.
Of course, one temperature compensation pipeline may be connected to a plurality of pipelines provided with the SCR denitration reactor; or, a plurality of temperature compensation pipes are connected with one pipe provided with the SCR denitration reactor.
In this embodiment, preheat I section outlet pipe 13 and be the main pipeline of I section 103 both sides export flue gas of preheating.
Or can be arranged as an outlet flue gas branch pipeline on two sides of the preheating I section 103. Two temperature compensation pipelines are correspondingly connected with two outlet flue gas branch pipelines one by one; or the temperature compensation pipeline is connected with the two outlet flue gas branch pipelines in series.
A regenerative fan is arranged on the regenerative flue of the drying section of the chain grate. In this embodiment, the temperature compensation pipeline is used for connecting to an inlet side of a regenerative fan on the regenerative flue. In this embodiment, the first heat recovery flue 14 is provided with a first heat recovery fan 21, and the second temperature compensation duct 2 is connected to an inlet side of the first heat recovery fan 21. The second regenerative flue 15 is provided with a second regenerative fan 22, and the third temperature compensation pipeline 3 is connected to the inlet side of the second regenerative fan 22.
Wherein, the heat source flue gas that the temperature compensation pipeline provided and the original flue gas in this pipeline that is provided with SCR denitration reactor pass through backheat fan, have effectively improved mixed effect, and the back is carried SCR denitration reactor to mixing the flue gas.
In order to improve the control precision, the temperature compensation pipeline is provided with a switch device for controlling the on-off of the temperature compensation pipeline and an adjusting device for adjusting the smoke flow of the temperature compensation pipeline. In this embodiment, the first temperature compensation pipe 1 is provided with a first switching device 4 and a first adjusting device 7, the second temperature compensation pipe 2 is provided with a second switching device 5 and a second adjusting device 8, and the third temperature compensation pipe 3 is provided with a third switching device 6 and a third adjusting device 9. Through switch and flow control operation respectively to realize the difference of first temperature compensation pipeline 1, second temperature compensation pipeline 2 and third temperature compensation pipeline 3's heat source flue gas and supply, effectively improved the control accuracy. Wherein, realize the control to the flue gas temperature after the heating through setting up, make the flue gas temperature satisfy the requirement of first SCR denitration reactor 10, second SCR denitration reactor 11 and third SCR denitration reactor 12, realize the normal operating of first SCR denitration reactor 10, second SCR denitration reactor 11 and third SCR denitration reactor 12.
The switching device and the adjusting device may be separately provided, or may be combined into one component, such as a switching valve capable of controlling flow.
The embodiment of the utility model provides a still provide a chain grate rotary kiln middle section SCR deNOx systems, include as above-mentioned arbitrary temperature compensation device. Because the temperature compensation device has the technical effects, the SCR denitration system at the middle section of the rotary kiln of the chain grate machine also has the same technical effects, and the description is not repeated.
In a first embodiment, as shown in fig. 2, the heat source component is the preheat ii section 104 of the grate 100; the temperature compensation pipeline is communicated with the upper part of the preheating II section 104, and outputs the upper hot flue gas of the preheating II section 104 to the pipeline provided with the SCR denitration reactor. Through the arrangement, the additional arrangement of a heat source part is avoided, and the structure of the SCR denitration system at the middle section of the rotary kiln of the chain grate machine is effectively simplified.
The upper part of the preheating II section 104 is provided with high-temperature flue gas, the high-temperature flue gas comes from the rotary kiln 200 of the SCR denitration system at the middle section of the rotary kiln of the chain grate machine, the temperature of the flue gas is generally in the range of 900-1100 ℃, and according to the process characteristics, the hot flue gas has more surplus besides being used for heating, so that the surplus part can be used for temperature compensation to heat the flue gas.
In the second embodiment, as shown in fig. 3, the heat source component is a ring cooling II hot air duct 16 for being arranged between the ring cooling II section of the ring cooling machine 300 and the preheating I section of the chain grate 100; the temperature compensation pipeline is communicated with the annular cooling II section hot air pipeline 16, and hot flue gas in the annular cooling II section hot air pipeline 16 is output to a pipeline provided with the SCR denitration reactor. Through the arrangement, the connecting pipeline (the ring cooling II section hot air pipeline 16) of the ring cooling machine 300 and the chain grate machine 100 is used as a heat source part, and the structure of the SCR denitration system at the middle section of the rotary kiln of the chain grate machine is also simplified.
It can be understood that the circular cooler 300, the circular cooling two-stage hot air pipeline 16 and the regenerative fan and the related connecting pipelines are the original equipment in the production process of the grate-rotary kiln pellets.
The annular cooling II-section regenerative air provided by the annular cooling II-section hot air pipeline 16 is a main source of heat for preheating the I-section 103, the air quantity is sufficient according to the characteristics of the system, the surplus air can be used, the hot air temperature is generally within the range of 850 plus one-step temperature of 1000 ℃, and therefore the surplus air can be used for temperature compensation to heat the flue gas.
As shown in fig. 4, in the third embodiment, the heat source component is an external heat source flue gas device 500; the temperature compensation pipeline is communicated with a hot flue gas outlet of the external heat source flue gas equipment 500, and outputs hot flue gas output by the external heat source flue gas equipment 500 to a pipeline provided with an SCR denitration reactor. Through addding external heat source flue gas equipment 500, it is less to the normal operating influence of original part in the rotary kiln middle section SCR deNOx systems of chain grate, has only played the temperature compensation effect.
In this embodiment, the external heat source flue gas device 500 is preferably configured as a hot blast stove. Other devices capable of providing heat source flue gas, such as boilers and the like, can also be adopted, and are not described in detail herein and are all within the protection scope.
In a fourth embodiment, as shown in fig. 5, the heat source component is the preheating i stage 103 of the grate 100; the temperature compensation pipeline is communicated with the upper part of the preheating I section 103, and outputs the upper hot flue gas of the preheating I section 103 to the pipeline provided with the SCR denitration reactor. Through the arrangement, the additional arrangement of a heat source part is avoided, and the structure of the SCR denitration system at the middle section of the rotary kiln of the chain grate machine is effectively simplified.
The upper high-temperature flue gas of the preheating I section 103 comes from the rotary kiln 200 and the annular cooling II section of the annular cooler 300, the flue gas temperature is generally within the range of 850-.
In the above four embodiments, only one heat source component may be used for temperature compensation, or two or more heat source components may be used for temperature compensation. For example, a portion of the temperature compensation piping may be in communication with the upper portion of the preheat i section 103, and another portion of the temperature compensation piping may be in communication with the external heat source flue gas plant 500.
It is right above the utility model provides a chain grate rotary kiln middle section SCR deNOx systems has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. The utility model provides a temperature compensation arrangement of chain grate rotary kiln middle section SCR deNOx systems which characterized in that includes:
the temperature compensation pipeline is used for being communicated with a pipeline provided with the SCR denitration reactor and is connected to the inlet side of the SCR denitration reactor;
and the heat source component is connected with the temperature compensation pipeline and used for outputting heat source smoke.
2. The temperature compensation device according to claim 1, wherein the pipe provided with the SCR denitration reactor includes: a backheating flue for communicating the preheating section II of the chain grate machine with the drying section of the chain grate machine, and a preheating section I outlet pipeline for communicating the preheating section I of the chain grate machine with a chimney;
the number of the temperature compensation pipelines is multiple and is respectively connected with the heat return flue and the outlet pipeline of the preheating I section in a one-to-one correspondence mode.
3. The temperature compensation device of claim 1, wherein the temperature compensation conduit is configured to be connected to an inlet side of a regenerative fan on a regenerative flue of a drying section of the grate.
4. The temperature compensation device of claim 1, wherein the temperature compensation conduit has thereon:
the switching device is used for controlling the on-off of the temperature compensation pipeline;
and the adjusting device is used for adjusting the flue gas flow of the temperature compensation pipeline.
5. An SCR denitration system at the middle section of a rotary kiln of a chain grate machine, which is characterized by comprising a temperature compensation device as claimed in any one of claims 1 to 4.
6. The SCR denitration system of the middle section of the rotary kiln of the chain grate machine as claimed in claim 5, wherein the heat source component is a preheating II section of the chain grate machine;
the temperature compensation pipeline is communicated with the upper part of the preheating section II and outputs the upper hot flue gas of the preheating section II to the pipeline provided with the SCR denitration reactor.
7. The SCR denitration system of the middle section of the rotary kiln of the chain grate machine as claimed in claim 5, wherein the heat source component is a ring cooling II section hot air pipeline arranged between a ring cooling II section of the ring cooling machine and a preheating I section of the chain grate machine;
and the temperature compensation pipeline is communicated with the annular cooling II-section hot air pipeline and outputs hot flue gas in the annular cooling II-section hot air pipeline to the pipeline provided with the SCR denitration reactor.
8. The SCR denitration system at the middle section of the rotary kiln of the chain grate machine as recited in claim 5, wherein the heat source component is an external heat source flue gas device;
the temperature compensation pipeline is communicated with a hot flue gas outlet of the external heat source flue gas equipment and outputs hot flue gas output by the external heat source flue gas equipment to the pipeline provided with the SCR denitration reactor.
9. The SCR denitration system at the middle section of the rotary kiln of the chain grate machine as recited in claim 8, wherein the external heat source flue gas equipment is a hot blast stove.
10. The SCR denitration system of the middle section of the rotary kiln of the chain grate as claimed in claim 5, wherein the heat source component is a preheating I section of the chain grate;
the temperature compensation pipeline is communicated with the upper part of the preheating section I, and outputs the upper hot flue gas of the preheating section I to the pipeline provided with the SCR denitration reactor.
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| CN201922319897.5U CN211514084U (en) | 2019-12-19 | 2019-12-19 | Grate rotary kiln middle section SCR deNOx systems and temperature compensating device thereof |
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| CN110876892A (en) * | 2019-12-19 | 2020-03-13 | 烟台龙源电力技术股份有限公司 | Grate rotary kiln middle section SCR deNOx systems and temperature compensating device thereof |
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| CN110876892A (en) * | 2019-12-19 | 2020-03-13 | 烟台龙源电力技术股份有限公司 | Grate rotary kiln middle section SCR deNOx systems and temperature compensating device thereof |
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