CN220892998U - Flue gas circulation system - Google Patents
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- CN220892998U CN220892998U CN202322487227.0U CN202322487227U CN220892998U CN 220892998 U CN220892998 U CN 220892998U CN 202322487227 U CN202322487227 U CN 202322487227U CN 220892998 U CN220892998 U CN 220892998U
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 239000003546 flue gas Substances 0.000 title claims abstract description 117
- 238000005245 sintering Methods 0.000 claims abstract description 141
- 239000000779 smoke Substances 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 10
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000004449 solid propellant Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 206010022000 influenza Diseases 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model discloses a flue gas circulation system, which comprises a sintering machine, wherein an igniter and a plurality of flue gas hoods are arranged above the sintering machine, a plurality of sintering bellows are arranged below the sintering machine, each sintering bellows is respectively connected with a large flue and a circulating flue through a branch pipe, a valve is arranged on the branch pipe, the circulating flue is connected with the flue gas hoods through a flue gas circulation pipeline, the large flue and the circulating flue are positioned below the sintering bellows, the lengths of the large flue and the circulating flue are matched with the total length of the sintering bellows, and the flue gas of the sintering bellows is converged into the same circulating flue; the circulating flue is connected with a smoke circulating pipeline which is connected with a plurality of smoke covers. The utility model can lead the flue gas generated in the sintering machine to be totally used for supplying heat to the sintering machine, has high energy saving efficiency, can reduce cost and construction difficulty, and can also adjust the temperature of the flue gas in the circulating flue; the utility model is suitable for the iron-making industry and is used for recycling the flue gas generated in the sintering machine.
Description
Technical Field
The utility model belongs to the field of flue gas treatment of sintering machines, and particularly relates to a flue gas circulation system.
Background
The sintering is to place various powdered iron-containing raw materials, fuel and flux mixed according to a certain proportion into sintering equipment for ignition sintering, under the action of high heat generated by the fuel and a series of physical and chemical changes, part of the surfaces of mixed material particles are softened and melted to generate a certain amount of liquid phase, other unmelted ore particles are wetted, and after cooling, the liquid phase sinters the ore powder particles into sintered ore, and the sintering is an important process in the iron-making industry.
Sintering is the most concentrated procedure for generating and discharging flue gas in the steel production process, and the pollution of the sintering flue gas has become one of the important factors for restricting the sustainable and coordinated development of the steel industry in China. In order to reduce the exhaust emission of sintering machines and control the pollution of flue gas, the flue gas circulation technology is gradually rising. The flue gas circulation technology mainly refers to a method for saving energy and reducing emission by recycling a part of heat-carrying gas discharged in the sintering process to a trolley of a sintering ignition furnace, and mainly aims to reduce the amount of discharged flue gas in sintering production, reduce the treatment load of a flue gas purification facility, recover the waste heat of sintering flue gas, improve the heat utilization rate of sintering, reduce the fuel consumption and improve the productivity.
A traditional sintering machine flue gas circulation system is characterized in that a wind box air door is communicated with a main smoke exhaust channel through a wind box branch pipe, and when flue gas circulation is needed in the working process, flue gas from a sintering machine wind box enters the main smoke exhaust channel or the circulating flue through the wind box air door and the wind box branch pipe by switching of a flue gas switching device. The temperature of the flue gas close to the machine head in the sintering machine is low, and the temperature of the flue gas close to the machine tail is high due to full combustion.
The invention patent application with the publication number of CN112815729A discloses a sintering machine smoke circulation method and system for energy conservation and emission reduction, wherein the sintering machine smoke circulation system is divided into a hot section smoke circulation system and a cold section smoke circulation system; the hot-section flue gas circulation system is used for leading out high-temperature (the temperature is more than 200 ℃) and high-oxygen (the oxygen content is more than 18%) flue gas at the tail of the sintering machine, and sending the flue gas into a hot-section flue gas hood of the machine head after dust removal; the cold section flue gas circulation system is used for leading out low-temperature and low-oxygen flue gas of the head of the sintering machine, and sending the low-temperature and low-oxygen flue gas into a cold section flue gas hood of the tail after dust removal, so as to supplement the circulating flue gas quantity and keep the temperature of a sintering large flue.
The flue gas circulation system has the following problems: 1. the high-temperature and high-oxygen smoke at the tail of the sintering machine is only conveyed into the material layer of the head of the sintering machine in the hot-section smoke circulation system, but the high-temperature smoke at the tail of the sintering machine is limited in quantity, so that the energy-saving effect is not obvious; 2. the hot section flue gas circulation system and the cold section flue gas circulation system are respectively connected with the sintering machine through the respective flue gas leading-out pipelines, the dust remover and the circulating fan, and in an actual steel production workshop, the equipment is huge in size, the distance between the equipment is long, and the structure needs a large number of pipelines for communication, so that the equipment cost is increased, and the construction difficulty is also increased.
Disclosure of utility model
In order to solve the above defects existing in the prior art, the utility model aims to provide a flue gas circulation system for realizing: 1. the flue gas from the head to the tail of the sintering machine is used for supplying heat to the sintering machine, so that the energy-saving efficiency is improved; 2. the number of connecting pipelines is reduced, and the cost and the construction difficulty are reduced; 3. and adjusting the temperature of the flue gas entering the circulating flue according to the requirement.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
The utility model provides a flue gas circulation system, including the sintering machine, the sintering machine top is provided with some igniters and a plurality of flue gas cover from aircraft nose to tail, the below of sintering machine is provided with a plurality of sintering bellows with sintering machine inner chamber intercommunication along its length direction, every sintering bellows all links to each other with big flue, circulation flue through the branch pipe respectively, be provided with the valve on the branch pipe, the circulation flue links to each other with a plurality of flue gas cover through the flue gas circulation pipeline, be provided with the dust remover along flue gas flow direction on the flue gas circulation pipeline, circulation fan, big flue, circulation flue all are located the below of sintering bellows, its length direction all is along the length direction setting of sintering machine, and the length of big flue, circulation flue all is with the total length looks adaptation of a plurality of sintering bellows, the sintering bellows of aircraft nose to tail all communicates with same circulation flue through respective valve; the circulating flue is connected with a smoke circulating pipeline, and one end of the smoke circulating pipeline, which is far away from the circulating flue, is connected with a plurality of smoke covers.
As a limitation of the present utility model: the branch pipes comprise first branch pipes used for connecting the sintering bellows and the large flue, and each first branch pipe is equally divided into a second branch pipe used for connecting the sintering bellows and the circulating flue; the flue gas is connected and disconnected between the sintering bellows and the large flue and between the sintering bellows and the circulating flue through valves.
As a further limitation of the utility model: the valve comprises a flap valve arranged below the branching point on each first branch pipe and an adjusting valve for controlling the smoke between a plurality of sintering bellows and the circulating flue to be communicated and cut off.
As a further limitation of the utility model: the circulating flue comprises a circulating main flue and a circulating branch flue which are arranged in a staggered manner up and down and are communicated with each other;
The adjacent sintering bellows in the sintering bellows are connected with the circulating branch flue through the second branch pipe, one end of the circulating branch flue close to the circulating main flue is provided with an adjusting valve, and part of flue gas enters the circulating branch flue through the second branch pipe and then is converged into the circulating main flue through the adjusting valve;
The rest of the plurality of sintering bellows are connected with the circulating main flue through second branch pipes, and each second branch pipe is provided with an adjusting valve;
The flue gas circulation pipeline is connected with the circulation main flue.
As a further limitation of the utility model: the sintering bellows near the machine head are connected with the circulating branch flue through the second branch pipes.
By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
The utility model is an improvement to the flue gas circulation system in the prior art, and the concrete improvement point is that only one circulation flue is adopted, the length of the circulation flue is matched with the total length of a plurality of sintering bellows, each sintering bellows is connected with the circulation flue through a branch pipe, the flue gas of the plurality of sintering bellows is led into the same circulation flue through respective valves, the flue gas from all the sintering bellows is conveyed into a sintering machine material layer through a flue gas circulation pipeline, and the solid fuel consumption is reduced through heat input; only one smoke circulating pipeline is arranged in the system, so that the use cost is reduced, and the problems of high construction strength and difficult pipeline connection caused by a large number of pipelines are avoided; the circulating flue comprises a circulating main flue and a circulating branch flue, wherein the circulating branch flue is connected with a plurality of sintering bellows close to a machine head and is controlled to be communicated with the circulating main flue through a main valve; when the temperature of the smoke at the machine head rises and the heat of the smoke is enough to be recycled by the sintering machine, the valve of the circulating branch flue and the valves of the sintering bellows close to the machine tail are opened, the smoke at the machine head and the machine tail is recycled by the sintering machine, and the solid fuel consumption is reduced to a greater extent.
In summary, the utility model can lead the flue gas generated in the sintering machine to be used for supplying heat to the sintering machine, has high energy-saving efficiency, can reduce cost and construction difficulty, and can regulate the temperature of the flue gas entering the circulating flue; the utility model is suitable for the iron-making industry, and is used for recycling the flue gas generated in the sintering machine, thereby realizing energy conservation and emission reduction.
Drawings
The utility model will be described in more detail below with reference to the accompanying drawings and specific examples.
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
In the figure: 1-smoke hood, 2-sintering bellows, 3-large flue, 4-smoke circulation pipeline, 5-dust remover, 6-circulating fan, 7-first branch pipe, 8-second branch pipe, 9-flap valve, 10-regulating valve, 11-sintering machine, 111-aircraft nose, 112-tail, 12-circulating flue, 121-circulating main flue and 122-circulating branch flue.
Detailed Description
Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that a flue gas recirculation system as described herein is a preferred embodiment and is used to illustrate and explain the utility model and is not to be construed as limiting the utility model.
The terms or positional relationships of "upper", "lower", "left", "right" and the like in the embodiments are based on the positional relationships of fig. 1 in the drawings of the present specification, and are merely for convenience of describing the present utility model and simplifying the description, and are not intended to indicate or imply that the apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the protection of the present utility model.
Embodiment a flue gas circulation system
As shown in fig. 1, the embodiment comprises a sintering machine 11, an igniter and a plurality of flue gas hoods 1 are arranged above the sintering machine 11 from a machine head 111 to a machine tail 112, a plurality of sintering bellows 2 are arranged below the sintering machine 11, each sintering bellows 2 is respectively connected with a large flue 3 and a circulating flue 12 through a branch pipe, a flue gas circulating pipeline 4 is connected to the circulating flue 12, and one end, far away from the circulating flue 12, of the flue gas circulating pipeline 4 is connected with the plurality of flue gas hoods 1. The system can enable all the flue gas generated in the sintering machine 11 to be used for supplying heat to the sintering machine 11, has high energy saving efficiency and less pipelines, and can reduce cost and construction difficulty.
In this embodiment, there are 23 sintering bellows 2, which are respectively numbered ①、②, … …, from the nose 111 to the tail 112,The 23 sintering bellows 2 are arranged below the sintering machine 11 and along the length direction of the sintering machine 11, and each sintering bellows 2 is communicated with the inner cavity of the sintering machine 11, so that smoke generated in the sintering machine 11 can enter the sintering bellows 2, and in the embodiment, the length direction refers to the left and right directions.
As shown in fig. 1, the large flue 3 and the circulating flue 12 are located below the sintering bellows 2, the length directions of the large flue 3 and the circulating flue 12 are all along the length direction of the sintering machine 11, and the lengths of the large flue 3 and the circulating flue 12 are matched with the total length of the plurality of sintering bellows 2, wherein the matching means that the lengths of the large flue 3 and the circulating flue 12 are respectively equal to the total length of the plurality of sintering bellows 2, in the embodiment, the large flue 3 is located close to the sintering bellows 2, and in the upper direction and the lower direction, the large flue 3 is located between the sintering bellows 2 and the circulating flue 12.
Each sintering bellows 2 is connected with the large flue 3 and the circulating flue 12 through branch pipes, each branch pipe comprises 23 first branch pipes 7 used for connecting 23 sintering bellows 2 with the large flue 3, each first branch pipe 7 is equally divided into a second branch pipe 8 used for connecting the sintering bellows 2 with the circulating flue 12, and the connection and disconnection of the flue gas are regulated through valves between the sintering bellows 2 and the large flue 3 and between the sintering bellows 2 and the circulating flue 12. The valve in the embodiment comprises a flap valve 9 and an adjusting valve 10, wherein each first branch pipe 7 is provided with the flap valve 9 below the branch point so as to realize the connection and disconnection of the sintering bellows 2 and the large flue 3; and the flue gas is communicated and cut off between the sintering bellows 2 and the circulating flue 12 through the adjusting valve 10.
The circulating flue 12 comprises a circulating main flue 121 and a circulating branch flue 122 which are communicated with each other;
near tail 112 The number sintering bellows 2 is connected with the circulating main flue 121 through second branch pipes 8, and it is to be noted that each second branch pipe 8 is provided with an adjusting valve 10, and whether the flue gas in the corresponding sintering bellows 2 enters the circulating main flue 121 is controlled by the adjusting valve 10; the flue gas circulation duct 4 is connected to the circulation main flue 121. The ①～⑧ # sintering bellows 2 close to the nose 111 is connected with the circulating branch flue 122 through a second branch pipe 8, one end of the circulating branch flue 122 close to the circulating main flue 121 is provided with an adjusting valve 10, and it is to be noted that the second branch pipe 8 connected with the ①～⑧ # sintering bellows 2 is not provided with the adjusting valve 10, and part of flue gas enters the circulating branch flue 122 through the second branch pipe 8 and then is gathered into the circulating main flue 121 together through the adjusting valve 10 on the circulating branch flue 122; the structure can reduce the installation quantity of the regulating valves 10 on the second branch pipes 8, so that a plurality of sintering bellows 2 close to the machine head 111 enter the main circulation flue 121 from the branch circulation flue 122 through one regulating valve 10, and materials are saved. The structure of the circulating main flue 121 and the circulating branch flue 122 can also adjust the temperature of the flue gas entering the circulating flue 12, when the temperature of the flue gas at the machine head 111 is low and the heat is insufficient to reduce the consumption of solid fuel, the adjusting valve 10 of the circulating branch flue 122 is closed, then the adjusting valves 10 of a plurality of sintering bellows 2 close to the machine tail 112 are opened, and only the high-temperature flue gas in the sintering bellows 2 at the machine tail 112 is utilized; when the temperature of the flue gas at the machine head 111 rises and the heat of the flue gas is enough to be recycled by the sintering machine, the regulating valve 10 of the circulating branch flue 122 and the regulating valves 10 of the plurality of sintering bellows 2 close to the machine tail 112 are opened, and the flue gas at the machine head 111 and the machine tail 112 is recycled by the sintering machine 11, so that the solid fuel consumption is reduced to a greater extent.
The ①～⑧ th sintered bellows 2 in this embodiment is connected to the circulation branch flue 122,The number of the sintering bellows 2 is connected with the main circulation flue 121, and the numbers of the sintering bellows 2 connected with the branch circulation flue 122 and the main circulation flue 121 can be adjusted according to the needs in practical application.
Because big flue 3, circulation flue 12 all match and have the air exhauster, if do not add the valve in order to control the flue gas flow direction alone, then can appear under the effect of respective air exhauster, the flue gas has the trend of getting into big flue 3 again, there is the trend of getting into circulation flue 12, under this condition, two air exhauster opportunities offset the amount of wind each other, consequently flap valve 9, adjusting valve 10 play a three-way effect, if want to make the flue gas get into circulation flue 12, then make flap valve 9 be in the closed condition, and open adjusting valve 10, the flue gas only gets into circulation flue 12 this moment, and do not receive the influence of big flue 3 air exhauster. In this embodiment, the flap valve 9 and the regulating valve 10 are both of the prior art, and the structure thereof will not be described in detail here; in the embodiment, the flap valve 9 is arranged on the first branch pipe 7, the regulating valve 10 is arranged on the second branch pipe 8, and the flap valve 9 and the regulating valve 10 in fig. 1 are drawn in the same way, which is only for illustration and not as limitation to the structure; the ①～⑧ # sintering bellows 2 in fig. 1 is connected with a circulating flue 12 through a second branch pipe 8, and the first branch pipes 7 are provided with flap valves 9, which are not completely shown in fig. 1.
In the embodiment, the number of the circulating flues 12 is one, the flue gas of 23 sintering bellows 2 can be collected into the circulating flues 12 through the second branch pipes 8, the flue gas circulating pipeline 4 is connected below the circulating flues 12, the dust remover 5 and the circulating fan 6 are arranged on the flue gas circulating pipeline 4 along the flue gas flowing direction, and in the embodiment, the dust remover 5 is a multi-pipe dust remover; the end of the flue gas circulation pipeline 4 far away from the circulation flue 12 is respectively connected with the plurality of flue gas hoods 1, when the sintering machine 11 material layers are used, flue gas from the 23 sintering bellows 2 can be conveyed into the sintering machine 11 material layers through the flue gas circulation pipeline 4, so that the solid fuel consumption is reduced through heat input, and compared with the method that only part of flue gas in the sintering bellows 2 is conveyed into the sintering machine 11 material layers, the utilization rate of the flue gas is improved, the purposes of energy conservation and emission reduction are achieved, and the strength of the sintering ores is improved; only one circulating flue 12 and flue gas circulating pipeline 4 are arranged in the system, so that the use cost is reduced, and the problems of high construction strength and difficult pipeline connection caused by a large number of pipelines are avoided.
The flue gas in the sintering bellows 2 is required to be conveyed into a material layer of the sintering machine 11 after being dedusted by the deduster 5, and the flue gas cannot be lower than 100 ℃, otherwise, the deduster 5 is condensed, so that the electrostatic dust removal effect is poor, and the flue gas temperature in the large flue 3 or the circulating flue 12 is ensured to be higher than 100 ℃; the specific means are as follows: when the temperature of the flue gas in the circulating flue 12 is lower, the adjusting valve 10 on the sintering bellows 2 close to the tail 112 is opened, so that the flue gas with higher temperature at the tail 112 enters the circulating flue 12, and the temperature in the circulating flue 12 is increased to be more than 100 ℃; therefore, the flap valve 9 and the regulating valve 10 can also play a role in regulating the temperature of the flue gas in the large flue 3 and the circulating flue 12.
Through field test, the operating frequency of the exhaust fan is reduced from 48.5Hz to 45Hz, the current is reduced from 370A to 300A, the annual energy saving is 10KV 70A 1.73X 24X 365= 10608360KWh, and the annual energy saving cost is 5304180 yuan according to 0.5 yuan per degree of electricity. The sintering coal blending is reduced to 3.9% from 4.5%, the coal consumption is reduced by 0.6%, 6800 tons of annual coal is sintered according to daily yield, 6800.6% 365= 14892 tons of annual coal is sintered according to 1500 yuan per ton, 22338000 yuan of annual cost is calculated according to 1500 yuan per ton, the steam generated by a flue boiler is increased to more than 5T/h from less than 2T/h, 150 DEG electricity is generated according to 150 DEG per ton of steam, 3.150.24.365= 3942000 DEG of annual coal is generated, 0.5 yuan= 1971000 yuan per ton, and the total cost is 29613180 yuan.
When the embodiment is used, when energy conservation and emission reduction are needed to be realized by utilizing the flue gas, all flap valves 9 are closed, all regulating valves 10 are opened, the flue gas enters a circulating flue 12 through a second branch pipe 8 and then enters a flue gas circulating pipeline 4, and the flue gas is conveyed into a flue gas hood 1 after being dedusted by a deduster 5; if the flue gas enters the large flue 3, the regulating valve 10 is closed, and the flap valve 9 is opened.
It should be noted that the foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but the present utility model is described in detail with reference to the foregoing embodiment, and it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. The utility model provides a flue gas circulation system, including the sintering machine, the sintering machine top is provided with some igniters and a plurality of flue gas cover from the aircraft nose to the tail, the below of sintering machine is provided with a plurality of sintering bellows that communicate with the sintering machine inner chamber along its length direction, every sintering bellows all links to each other with big flue, circulation flue through the branch pipe respectively, be provided with the valve on the branch pipe, the circulation flue links to each other with a plurality of flue gas cover through the flue gas circulation pipeline, be provided with dust remover, circulation fan along flue gas flow direction on the flue gas circulation pipeline, characterized by, big flue, circulation flue are all located the below of sintering bellows, its length direction all sets up along the length direction of sintering machine, and the length of big flue, circulation flue all is with the total length looks adaptation of a plurality of sintering bellows, the sintering bellows of aircraft nose to tail all communicates with same circulation flue through respective valve; the circulating flue is connected with a smoke circulating pipeline, and one end of the smoke circulating pipeline, which is far away from the circulating flue, is connected with a plurality of smoke covers.
2. A flue gas recirculation system according to claim 1, wherein the branch pipes comprise first branch pipes for connecting the sintering bellows with the large flue, each first branch pipe being branched off by a second branch pipe for connecting the sintering bellows with the circulation flue; the flue gas is connected and disconnected between the sintering bellows and the large flue and between the sintering bellows and the circulating flue through valves.
3. A flue gas recirculation system according to claim 2, wherein the valves comprise flap valves arranged below the branching point on each first branch pipe, and regulating valves for controlling the flow of flue gas between the plurality of sinter bellows and the recirculation flue.
4. A flue gas recirculation system according to claim 3, wherein the recirculation flue comprises a main recirculation flue and a branch recirculation flue in communication with each other;
The adjacent sintering bellows in the sintering bellows are connected with the circulating branch flue through the second branch pipe, one end of the circulating branch flue close to the circulating main flue is provided with an adjusting valve, and part of flue gas enters the circulating branch flue through the second branch pipe and then is converged into the circulating main flue through the adjusting valve;
The rest of the plurality of sintering bellows are connected with the circulating main flue through second branch pipes, and each second branch pipe is provided with an adjusting valve;
The flue gas circulation pipeline is connected with the circulation main flue.
5. A flue gas recirculation system according to claim 4, wherein the plurality of sintering bellows adjacent the head are each connected to the recirculation branch flue by a second branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322487227.0U CN220892998U (en) | 2023-09-13 | 2023-09-13 | Flue gas circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322487227.0U CN220892998U (en) | 2023-09-13 | 2023-09-13 | Flue gas circulation system |
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| CN220892998U true CN220892998U (en) | 2024-05-03 |
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| CN202322487227.0U Active CN220892998U (en) | 2023-09-13 | 2023-09-13 | Flue gas circulation system |
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| CN (1) | CN220892998U (en) |
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2023
- 2023-09-13 CN CN202322487227.0U patent/CN220892998U/en active Active
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