CN203935781U - The high oxynitrides flue gas recirculation of sintering machine denitrating system - Google Patents
The high oxynitrides flue gas recirculation of sintering machine denitrating system Download PDFInfo
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- CN203935781U CN203935781U CN201420399366.6U CN201420399366U CN203935781U CN 203935781 U CN203935781 U CN 203935781U CN 201420399366 U CN201420399366 U CN 201420399366U CN 203935781 U CN203935781 U CN 203935781U
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Abstract
The high oxynitrides flue gas recirculation of a kind of sintering machine denitrating system, comprising: sintering machine; Smoke collecting cover, is located at sintering machine upper center and establishes exhanst gas outlet; Circulating line, its mist entrance connects exhanst gas outlet; Mixed wind regulates pipeline, connects mist entrance by the air outlet slit of mixed wind control valve; First and second reuse pipeline, air intake connects respectively first and second gas outlet of circulating line, and gas outlet connects respectively first and second air supply opening of sintering machine; The heater, Benitration reactor, desulfurizing tower and the chimney that are connected to successively the 3rd gas outlet of circulating line, chimney is established off-gas recovery mouth; And the 3rd reuse pipeline, its first air intake connects the off-gas recovery mouth of chimney, and the second air intake connects Benitration reactor, and gas outlet connects the 3rd air supply opening of sintering machine.The utility model improves more than 23% the flue gas recirculation utilization rate of existing sintering machine, and in the flue gas of smoke stack emission, oxynitrides content meets national standard, and the consumption of sintering machine self-energy reduces more than 4.7%.
Description
Technical field
The utility model relates to the high oxynitrides flue gas recirculation of a kind of sintering machine denitrating system, be mainly used in utilizing the flue gas recirculation of sintering machine, realize reduction of discharging and the denitration of oxynitrides, energy consumption when reducing the energy consumption of sintering machine self and flue gas recirculation simultaneously and utilizing, and can improve the efficiency that flue gas recirculation utilizes.
Background technology
Sintering machine is applied many in steel manufacture process, and can produce a large amount of flue gases in sintering production process, and in flue gas, often contain multiple pollutant (as particle, oxynitrides NOx, sulfur dioxide, carbon monoxide, HCl, HF, alkali metal, various heavy and the gas chromatography including PCDD/F etc.), large and the pollution condition complexity to atmospheric pollution level, be difficult to administer, therefore,, before entering atmosphere, often need this flue gas to process.
In prior art, what the flue gas producing for sintering machine was processed most employing is fixing equipment, it is carried out to denitrogenation, desulfurization, dedusting etc., but, processing mode of the prior art all needs independent treatment facility, not only make processing cost high, and, certain requirement also there is for the size in place.
At present, some adopts the mode of flue gas recirculation to reduce the technical scheme of smoke pollution, and still, in existing technical scheme, flue gas recirculation utilization rate is lower, is often no more than 50%, and energy consumption is higher, and is unfavorable for follow-up denitration processing.
Utility model content
In view of the foregoing, the technical problems to be solved in the utility model is, the high oxynitrides flue gas recirculation of a kind of sintering machine denitrating system is provided, can utilize the flue gas recirculation of sintering machine, realize reduction of discharging and the denitration of oxynitrides, energy consumption when reducing the energy consumption of sintering machine self and flue gas recirculation simultaneously and utilizing, and can improve the efficiency that flue gas recirculation utilizes.
In order to solve the problems of the technologies described above, the main technical schemes that the utility model provides is:
The high oxynitrides flue gas recirculation of a kind of sintering machine denitrating system, it comprises:
Sintering machine;
Smoke collecting cover, is located at sintering machine upper center position, and the top of described smoke collecting cover is provided with exhanst gas outlet;
Circulating line, its mist entrance connects described exhanst gas outlet;
Mixed wind regulates pipeline, connects the mist entrance of described circulating line by the air outlet slit of mixed wind control valve;
The first reuse pipeline, its air intake connects the first gas outlet of described circulating line, and its gas outlet connects the first air supply opening of described sintering machine;
The second reuse pipeline, its air intake connects the second gas outlet of described circulating line, and its gas outlet connects the second air supply opening of described sintering machine;
Heater, its air intake connects the 3rd gas outlet of described circulating line;
Benitration reactor, its air intake connects the gas outlet of described heater, in this Benitration reactor, is provided with catalyst layer, and its upper position is provided with the first off-gas recovery mouth;
Desulfurizing tower, its air intake connects the gas outlet of described Benitration reactor;
Chimney, its air intake connects the gas outlet of described desulfurizer, and medium position is also provided with the second off-gas recovery mouth; And
The 3rd reuse pipeline, its first air intake connects described the first off-gas recovery mouth, its second air intake connects described the second off-gas recovery mouth, and its gas outlet connects the 3rd air supply opening of described sintering machine, between described the first air intake and the first off-gas recovery mouth, is provided with control valve.
Wherein, the first air supply opening, the second air supply opening and the 3rd air supply opening of described sintering machine is located at the bottom of sintering machine, described the second air supply opening is located at medium position, and described the first air supply opening is located at the head position near sintering machine, and described the 3rd air supply opening is located at the tail position near sintering machine.
Wherein, described chimney phases down from its air intake to gas outlet internal diameter, and wherein, the speed of the internal diameter reduction from its air intake to off-gas recovery mouth section is less than the speed of its off-gas recovery mouth to the internal diameter reduction of gas outlet section.
The beneficial effects of the utility model are:
By the design of circulation line, not only realize the reduction of discharging of oxynitrides, improve denitration efficiency, and improve the cyclic utilization rate of sintering machine for flue gas, also reduce to a certain extent the energy consumption of sintering machine self, and reduced flue gas recirculation and utilized the energy consumption in process, in having reduced atmosphere pollution, there is the effect that reduces energy consumption, meet the theory of environmental protection, sustainable development.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present utility model.
[main element symbol description]
Sintering machine 1;
Smoke collecting cover 11;
Catalyst adds mouth 100; Head 101; Tail 102;
Circulating line 2;
The first circulating fan 21; The first circulation-type deduster 22;
Mixed wind regulates pipeline 3;
Mixed wind control valve 31;
The first reuse pipeline 4;
The second reuse pipeline 5;
The 3rd reuse pipeline 6;
The first flapper valve 60; The 3rd circulation-type deduster 61; Three-circulation wind machine 62;
Heater 7;
The second circulation-type deduster 70; The second circulating fan 71;
Benitration reactor 8;
Catalyst layer 80; Control valve 81;
Desulfurizing tower 9;
Chimney 10;
Angle α; Angle β.
Detailed description of the invention
So that understand, below in conjunction with accompanying drawing, by detailed description of the invention, the utility model is further described the utility model in order better to explain.
Referring to Fig. 1, an embodiment of the high oxynitrides flue gas recirculation of sintering machine of the present utility model denitrating system, it comprises:
Sintering machine 1;
Smoke collecting cover 11, is located at sintering machine 1 upper center position, and the top of described smoke collecting cover 11 is provided with exhanst gas outlet;
Circulating line 2, its mist entrance connects described exhanst gas outlet;
Mixed wind regulates pipeline 3, connects the mist entrance of described circulating line 2 by the air outlet slit of mixed wind control valve 31;
The first reuse pipeline 4, its air intake connects the first gas outlet of described circulating line 2, and its gas outlet connects the first air supply opening of described sintering machine 1;
The second reuse pipeline 5, its air intake connects the second gas outlet of described circulating line 2, and its gas outlet connects the second air supply opening of described sintering machine 1;
Heater 7, its air intake connects the 3rd gas outlet of described circulating line 2;
Benitration reactor 8, its air intake connects the gas outlet of described heater 7, so that denitration is carried out under preference temperature, in this Benitration reactor 8, be provided with catalyst layer 80, to improve denitration efficiency, reduce or avoid the use of ammonia, its upper position is provided with the first off-gas recovery mouth, to the flue gas after denitration is reclaimed;
Desulfurizing tower 9, its air intake connects the gas outlet of described Benitration reactor 8;
Chimney 10, its air intake connects the gas outlet of described desulfurizing tower 9, and medium position is also provided with off-gas recovery mouth; And
The 3rd reuse pipeline 6, its first air intake connects described the first off-gas recovery mouth, its second air intake connects described the second off-gas recovery mouth, and its gas outlet connects the 3rd air supply opening of described sintering machine 1, between described the first air intake and the first off-gas recovery mouth, is provided with control valve 81.
Wherein, the first air supply opening, the second air supply opening and the 3rd air supply opening of described sintering machine 1 is located at the bottom of sintering machine 1, described the second air supply opening is located at the medium position of the bottom of sintering machine 1, described the first air supply opening is located at the position near the head 101 of sintering machine 1, and described the 3rd air supply opening is located at the position near the tail 102 of sintering machine 1.
Wherein, the setting position place of described the 3rd air supply opening, the height of the inner space of described sintering machine 1 is lower than the height of other positions, to obtain higher flue gas recirculation utilization rate.In the present embodiment, the height of the position of the tail 102 of described sintering machine 1 is lower than the height of the position of the head 101 of sintering machine 1.
Wherein, between the exhanst gas outlet of described smoke collecting cover 11 and the mist entrance of described circulating line 2, be provided with the first circulating fan 21 and the first circulation-type deduster 22 that are connected successively.
Wherein, between the 3rd gas outlet of described circulating line 2 and the air intake of described heater 7, be connected with the second circulation-type deduster 70 and the second circulating fan 71 in turn, wherein, the gas outlet of the air intake of the second circulation-type deduster 70 and the second circulating fan 71 is connected respectively the 3rd gas outlet of described circulating line 2 and the air intake of described heater 7.
Wherein, between the off-gas recovery mouth of described chimney 10 and the air intake of the 3rd reuse pipeline 6, be provided with the first flapper valve 60, the 3rd circulation-type deduster 61 and the three-circulation wind machine 62 that are connected successively, wherein, the gas outlet of three-circulation wind machine 62 connects the air intake of described the 3rd reuse pipeline 6.
Wherein, described the first reuse pipeline 4 and/or the second reuse pipeline 5 are provided with independent second baffle valve, the 3rd flapper valve of controlling, to can optionally open and close as required, realize best flue gas recirculation effect, be located at control valve between described the first air intake and the first off-gas recovery mouth 81 for control valve that can control piper break-make, so that adjust flux or close completely as required.
Wherein, head 101 tops of described sintering machine 1 are provided with catalyst and add mouth 100, to can add as required catalyst.
Wherein, described chimney 10 phases down from its air intake to gas outlet internal diameter, and wherein, the speed of the internal diameter reduction from its air intake to off-gas recovery mouth section is less than the speed of its off-gas recovery mouth to the internal diameter reduction of gas outlet section, to improve the efficiency of off-gas recovery.
Wherein, described chimney 10 its air intakes are to off-gas recovery mouth section, inner wall of stack and vertical direction near off-gas recovery mouth one side are an angle α, the inner wall of stack of other positions of described chimney 10 and vertical direction are an angle β, the number of degrees of angle α are less than the number of degrees of angle β, further to improve the efficiency of off-gas recovery.
Wherein, the number of degrees of described angle α are less than or equal to the half of the number of degrees of angle β, to obtain more excellent off-gas recovery efficiency.
In an embodiment of the present utility model, preferably, the number of degrees of described angle α are 37.5% size of the number of degrees of described angle β.
In another embodiment of the present utility model, described the first air supply opening is located at the position near the tail 102 of sintering machine 1, and described the 3rd air supply opening is located at the position near the head 101 of sintering machine 1.In the present embodiment, the height of the position of the head 101 of described sintering machine 1 is lower than the height of the position of the tail 102 of sintering machine 1.
The utility model arranges by said structure, the flue gas recirculation utilization rate of existing sintering machine is improved more than 23%, and in the flue gas that chimney 10 discharges, oxynitrides content meets national standard, and, the consumption of sintering machine self-energy reduces more than 4.7%, and smoke circulating system of the present utility model is realized zero energy consumption substantially.
Claims (10)
1. the high oxynitrides flue gas recirculation of a sintering machine denitrating system, is characterized in that comprising:
Sintering machine;
Smoke collecting cover, is located at sintering machine upper center position, and the top of described smoke collecting cover is provided with exhanst gas outlet;
Circulating line, its mist entrance connects described exhanst gas outlet;
Mixed wind regulates pipeline, connects the mist entrance of described circulating line by the air outlet slit of mixed wind control valve;
The first reuse pipeline, its air intake connects the first gas outlet of described circulating line, and its gas outlet connects the first air supply opening of described sintering machine;
The second reuse pipeline, its air intake connects the second gas outlet of described circulating line, and its gas outlet connects the second air supply opening of described sintering machine;
Heater, its air intake connects the 3rd gas outlet of described circulating line;
Benitration reactor, its air intake connects the gas outlet of described heater, in this Benitration reactor, is provided with catalyst layer, and its upper position is provided with the first off-gas recovery mouth;
Desulfurizing tower, its air intake connects the gas outlet of described Benitration reactor;
Chimney, its air intake connects the gas outlet of described desulfurizer, and medium position is also provided with the second off-gas recovery mouth; And
The 3rd reuse pipeline, its first air intake connects described the first off-gas recovery mouth, its second air intake connects described the second off-gas recovery mouth, and its gas outlet connects the 3rd air supply opening of described sintering machine, between described the first air intake and the first off-gas recovery mouth, is provided with control valve.
2. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 1 denitrating system, it is characterized in that: the first air supply opening, the second air supply opening and the 3rd air supply opening of described sintering machine is located at the bottom of sintering machine, described the second air supply opening is located at medium position, described the first air supply opening, the 3rd air supply opening are located at respectively head position, the tail position near sintering machine, wherein, the setting position place of described the 3rd air supply opening, the height of the inner space of described sintering machine is lower than the height of the inner space of other positions of described sintering machine.
3. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 1 denitrating system, is characterized in that: between the mist entrance of the exhanst gas outlet of described smoke collecting cover and described circulating line, be provided with the first circulating fan and the first circulation-type deduster that are connected successively.
4. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 1 denitrating system, it is characterized in that: between the 3rd gas outlet of described circulating line and the air intake of described heater, be connected with the second circulation-type deduster and the second circulating fan in turn, wherein, the gas outlet of the air intake of the second circulation-type deduster and the second circulating fan is connected respectively the 3rd gas outlet of described circulating line and the air intake of described heater.
5. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 1 denitrating system, it is characterized in that: between the off-gas recovery mouth of described chimney and the air intake of the 3rd reuse pipeline, be provided with the flapper valve, the 3rd circulation-type deduster and the three-circulation wind machine that are connected successively, wherein, the gas outlet of three-circulation wind machine connects the air intake of described the 3rd reuse pipeline.
6. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 1 denitrating system, it is characterized in that: described the first reuse pipeline and/or the second reuse pipeline are provided with the independent flapper valve of controlling, the control valve of being located between described the first air intake and the first off-gas recovery mouth is the control valve of energy control piper break-make.
7. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 1 denitrating system, is characterized in that: the head upper of described sintering machine is provided with catalyst and adds mouth.
8. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 1 denitrating system, it is characterized in that: described chimney phases down from its air intake to gas outlet internal diameter, wherein, from its air intake, the speed of the reduction of the internal diameter to off-gas recovery mouth section is less than the speed of its off-gas recovery mouth to the internal diameter reduction of gas outlet section.
9. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 8 denitrating system, it is characterized in that: its air intake of described chimney is to off-gas recovery mouth section, inner wall of stack and vertical direction near off-gas recovery mouth one side are an angle α, the inner wall of stack of other positions of described chimney and vertical direction are an angle β, and the number of degrees of angle α are less than the number of degrees of angle β.
10. the high oxynitrides flue gas recirculation of sintering machine as claimed in claim 9 denitrating system, is characterized in that: the number of degrees of described angle α are less than or equal to the half of the number of degrees of angle β.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399366.6U CN203935781U (en) | 2014-07-18 | 2014-07-18 | The high oxynitrides flue gas recirculation of sintering machine denitrating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399366.6U CN203935781U (en) | 2014-07-18 | 2014-07-18 | The high oxynitrides flue gas recirculation of sintering machine denitrating system |
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| CN203935781U true CN203935781U (en) | 2014-11-12 |
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| CN201420399366.6U Expired - Fee Related CN203935781U (en) | 2014-07-18 | 2014-07-18 | The high oxynitrides flue gas recirculation of sintering machine denitrating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051202A (en) * | 2017-06-13 | 2017-08-18 | 武汉钢铁有限公司 | Sinter flue gas section cyclic coupling flue dust self-catalysis denitrating system |
| CN107413193A (en) * | 2017-06-13 | 2017-12-01 | 武汉钢铁有限公司 | One kind sintering flue gas section cyclic flue dust catalytic denitration technique |
| CN112569758A (en) * | 2019-09-27 | 2021-03-30 | 江苏集萃冶金技术研究院有限公司 | Online denitration process for sintering flue gas |
-
2014
- 2014-07-18 CN CN201420399366.6U patent/CN203935781U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051202A (en) * | 2017-06-13 | 2017-08-18 | 武汉钢铁有限公司 | Sinter flue gas section cyclic coupling flue dust self-catalysis denitrating system |
| CN107413193A (en) * | 2017-06-13 | 2017-12-01 | 武汉钢铁有限公司 | One kind sintering flue gas section cyclic flue dust catalytic denitration technique |
| CN112569758A (en) * | 2019-09-27 | 2021-03-30 | 江苏集萃冶金技术研究院有限公司 | Online denitration process for sintering flue gas |
| CN112569758B (en) * | 2019-09-27 | 2022-08-23 | 江苏集萃冶金技术研究院有限公司 | Online denitration process for sintering flue gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hebei Zhuo Hua Environmental Engineering Co., Ltd. Assignor: Wen Guangsheng Contract record no.: 2015130000023 Denomination of utility model: Cyclic denitration system for high-nitrogen oxide flue gas of sintering machine Granted publication date: 20141112 License type: Exclusive License Record date: 20150228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |