CN212974680U - Sintering machine flue gas desulfurization denitration integration treatment facility - Google Patents
Sintering machine flue gas desulfurization denitration integration treatment facility Download PDFInfo
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- CN212974680U CN212974680U CN201922106296.6U CN201922106296U CN212974680U CN 212974680 U CN212974680 U CN 212974680U CN 201922106296 U CN201922106296 U CN 201922106296U CN 212974680 U CN212974680 U CN 212974680U
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Abstract
The utility model discloses a sintering machine flue gas desulfurization and denitration integrated treatment device, including the sintering machine, the flue gas chiller, pretreatment tower and SOx/NOx control tower, the flue gas outlet of sintering machine passes through the pipeline and communicates with the entry of flue gas chiller, the export of flue gas chiller is linked together through the pipeline and the first flue gas entry of pretreatment tower lower part, the first flue gas export at pretreatment tower top is linked together through the pipeline and the second flue gas entry of SOx/NOx control tower lower part, SOx/NOx control tower top is equipped with the second flue gas export, the second flue gas export is connected with the outer calandria of purification flue gas, from last to having set gradually ozone mixing arrangement down in the pretreatment tower, a plurality of first defogging devices, a plurality of first spray set and first gas distributor; a plurality of second demisting devices, a plurality of second spraying devices and a second gas distributor are sequentially arranged in the desulfurization and denitrification tower from top to bottom. The equipment can carry out denitration and desulfurization integrated treatment on low-temperature sintering flue gas, and the removal efficiency is high.
Description
Technical Field
The utility model relates to a sintering flue gas handles technical field, concretely relates to sintering machine flue gas desulfurization denitration integration treatment facility.
Background
Sintering is an important link in steel smelting, and is a process of adding certain fuel and auxiliary materials into various steelmaking raw materials which can not be directly fed into a furnace, such as fine ore, miscellaneous auxiliary materials and the like, heating to a certain temperature to sinter powder into blocks, wherein a large amount of flue gas is generated along with the steel sintering process, and the flue gas contains SO2And the atmospheric pollutants such as dust, NOx and the like can be discharged only after being treated by a desulfurization and denitrification process to reach the standard.
At present, the main pollutant SO in the sintering flue gas generated by a sintering machine2And dust have already had more mature desorption processes, but for NOx desorption work, the reduction method is generally adopted for desorption at present, but because the temperature of sintering flue gas is generally 120-180 ℃, and the temperature required in the process of NOx desorption is more than 300 ℃, this needs to set up the supporting heating apparatus additionally to heat up sintering flue gas, leads to large investment, the additional equipment is many, and the processing and running cost is higher.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the above-mentioned background art, the utility model aims to provide a sintering machine flue gas desulfurization denitration integration treatment facility, it can carry out denitration desulfurization integration to low temperature sintering flue gas and handle, and the desorption is efficient, reduces investment and running cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a sintering machine flue gas desulfurization and denitrification integrated treatment device, which comprises a sintering machine, a flue gas chiller, a pretreatment tower and a desulfurization and denitrification tower, wherein the flue gas outlet of the sintering machine is communicated with the inlet of the flue gas chiller through a pipeline, the outlet of the flue gas chiller is communicated with a first flue gas inlet at the lower part of the pretreatment tower through a pipeline, the first flue gas outlet at the top of the pretreatment tower is communicated with a second flue gas inlet at the lower part of the desulfurization and denitrification tower through a pipeline, the top of the desulfurization and denitrification tower is provided with a second flue gas outlet, the second flue gas outlet is connected with a purified flue gas outer pipe, an ozone mixing device, a plurality of first demisting devices, a plurality of first spraying devices and a first gas distributor are sequentially arranged in the pretreatment tower from top to bottom, the bottom of the pretreatment tower is respectively communicated with the plurality of first spraying devices through a first circulating pipeline, the first circulating pipeline is provided with a first circulating pump, the ozone mixing device comprises a plurality of ozone gas distribution disks which are sequentially arranged from top to bottom and a flow guide mechanism arranged between every two adjacent ozone gas distribution disks, and the plurality of ozone gas distribution disks are respectively communicated with an ozone generator positioned on the outer side of the pretreatment tower through pipelines;
the device comprises a desulfurization and denitrification tower and is characterized in that a plurality of second demisting devices, a plurality of second spraying devices and a second gas distributor are sequentially arranged in the desulfurization and denitrification tower from top to bottom, the bottom of the desulfurization and denitrification tower is respectively communicated with the plurality of second spraying devices through a second circulating pipeline, a second circulating pump is arranged on the second circulating pipeline, and one side of the lower part of the desulfurization and denitrification tower is communicated with an alkali liquor supply tank through a pipeline.
The improved pretreatment tower is characterized in that the flow guide mechanism comprises a flow guide plate and a flow guide strip, a plurality of flow guide plates are distributed on the inner side wall of the pretreatment tower between two adjacent ozone distribution disks in a staggered mode from top to bottom, the flow guide plates are arranged in an inclined mode, and a plurality of flow guide strips are arranged on the inner side wall of the pretreatment tower between two adjacent ozone distribution disks. Through setting up guide plate and drainage strip, the ascending route of the mist of extension sintering flue gas and ozone to make mist be the heliciform motion in the preliminary treatment tower, make sintering flue gas and ozone obtain abundant mixture and contact, abundant with low-price nitrogen oxide oxidation for the high-price nitrogen oxide that the high price is easily absorbed, guarantee denitration effect.
The further improvement is that the included angle between the guide plate and the inner radial direction of the pretreatment tower is 20-30 degrees, and the guide plate is uniformly provided with guide holes.
The further improvement is that the first spraying device and the second spraying device have the same structure, the first spraying device comprises a water inlet main pipeline which is transversely arranged, one end of the water inlet main pipeline is communicated with the first circulating pipeline, the other end of the water inlet main pipeline penetrates through one side of the pretreatment tower, and is fixed on the inner side wall of the other side of the pretreatment tower opposite to the pretreatment tower through a supporting seat, a plurality of water inlet branch pipelines communicated with the water inlet main pipeline are arranged on the two sides of the water inlet main pipeline at equal intervals, wherein the water inlet branch pipes are distributed on two sides of the water inlet main pipe in a one-to-one corresponding mode, or the water inlet branch pipes are distributed on two sides of the water inlet main pipe in a staggered mode, the free end of the branch water inlet pipeline is fixedly arranged on the inner side wall of the pretreatment tower through a supporting seat, a plurality of nozzles are arranged on the branch water inlet pipeline, and the spraying direction of the nozzles is opposite to the gas flow direction in the pretreatment tower. Through setting up spray set, can improve the spray regime of nozzle, the reinforcing sprays the effect.
The first demisting device and the second demisting device are identical in structure, the first demisting device is composed of a plurality of plates which are arranged in parallel in the radial direction of the pretreatment tower, the plates are preferably made of polypropylene, the plates are of a streamline structure, and the plates are fixed on the inner side wall of the pretreatment tower through a support frame. The sintering flue gas after desulfurization and denitration treatment flows through the plate at a certain speed, because the plate is of a streamline structure, the flue gas is changed in motion direction rapidly and continuously, and due to the action of centrifugal force and inertia, fog drops in the sintering flue gas collide with the plate to be converged into water flow, and fall to the bottom in the desulfurization and denitration tower for cyclic utilization under the action of gravity, and the purified sintering flue gas after high-efficiency demisting and dedusting is discharged out of the tower through the purified flue gas outer discharge pipe.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses in through setting up the flue gas chiller, fall sintering machine exhaust high temperature sintering flue gas temperature to below 130 ℃, make ozone can keep higher activity to oxidize the low price nitrogen oxide in the sintering flue gas, the processing of cooling is sprayed to the sintering flue gas through the first spray set in the preliminary treatment tower again, in order to avoid the sintering flue gas of higher temperature to influence the oxidative activity of ozone, dust and droplet in the sintering flue gas are got rid of through first defogging device, alleviate the processing pressure of follow-up SOx/NOx control tower, make sintering flue gas and ozone obtain abundant mixture and contact through the ozone mixing arrangement, abundant with low price nitrogen oxide oxidation for the high price nitrogen oxide that high price is easily absorbed, guarantee denitration effect; and (4) the mixed flue gas enters a desulfurization and denitrification tower for deep desulfurization and denitrification treatment, and finally reaches the emission standard and is discharged. The equipment realizes the integration of low-temperature desulfurization and denitrification, has high removal efficiency, stable equipment operation and low investment and operation cost, and is convenient for industrial application.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is an overall structure diagram of the integrated flue gas desulfurization and denitrification treatment equipment of the sintering machine of the utility model;
FIG. 2 is an internal structure view of the pretreatment tower of the present invention;
FIG. 3 is an internal structure diagram of the desulfurization and denitrification tower of the present invention;
fig. 4 is a schematic structural view of a first spraying device in the present invention;
fig. 5 is a schematic structural view of a first defogging device according to the present invention;
FIG. 6 is a schematic structural view of an ozone distribution plate of the present invention;
wherein, the specific reference numbers are: the device comprises a sintering machine 1, a flue gas chiller 2, a pretreatment tower 3, an ozone gas distribution plate 6, a main gas inlet pipe 7, an outer annular guide pipe 8, an inner annular guide pipe 9, a radial communicating pipe 10, an air vent 11, a guide plate 13, a guide strip 14, a first demisting device 15, a plate 16, a support frame 17, a first spraying device 18, a main water inlet pipeline 19, a branch water inlet pipeline 20, a support seat 21, a first gas distributor 22, a first circulating pipeline 23, a first circulating pump 24, an ozone generator 25, a desulfurization and denitrification tower 27, a second demisting device 29, a second spraying device 30, a second gas distributor 31, a second circulating pipeline 32, a second circulating pump 33, an alkali liquor supply tank 34 and an outer purified flue gas discharge pipe 35.
Detailed Description
The embodiment of the utility model discloses a sintering machine flue gas desulfurization and denitrification integrated treatment device, as shown in fig. 1, the system comprises a sintering machine 1, a flue gas chiller 2, a pretreatment tower 3 and a desulfurization and denitrification tower 27, wherein a flue gas outlet of the sintering machine 1 is communicated with an inlet of the flue gas chiller 2 through a pipeline, an outlet of the flue gas chiller 2 is communicated with a first flue gas inlet at the lower part of the pretreatment tower 3 through a pipeline, a first flue gas outlet at the top of the pretreatment tower 3 is communicated with a second flue gas inlet at the lower part of the desulfurization and denitrification tower 27 through a pipeline, a second flue gas outlet is arranged at the top of the desulfurization and denitrification tower 27 and is connected with a purified flue gas outer discharge pipe 35, the temperature of the high-temperature sintering flue gas discharged by the sintering machine 1 is reduced to below 130 ℃ by arranging the flue gas chiller 2, so that the ozone can maintain higher activity to oxidize low-valence nitrogen oxides in the sintering flue gas. As shown in fig. 2, an ozone mixing device, a plurality of first demisting devices 15, a plurality of first spraying devices 18 and a first gas distributor 22 are sequentially arranged in the pretreatment tower 3 from top to bottom, the bottom of the pretreatment tower 3 is communicated with the first spraying devices 18 through a first circulating pipeline 23, a first circulating pump 24 is arranged on the first circulating pipeline 23, the ozone mixing device comprises a plurality of ozone gas distribution disks 6 sequentially arranged from top to bottom and a flow guide mechanism arranged between the two adjacent ozone gas distribution disks 6, and the ozone gas distribution disks 6 are communicated with an ozone generator 25 positioned outside the pretreatment tower 3 through pipelines. Wherein, the water conservancy diversion mechanism includes guide plate 13 and drainage strip 14, it has a plurality of guide plates 13 to be located the crisscross distribution of top-down on 3 inside walls of pretreatment tower between two adjacent ozone gas distribution dishes 6, guide plate 13 slope upwards sets up, be located and still be equipped with a plurality of drainage strips 14 on 3 inside walls of pretreatment tower between two adjacent ozone gas distribution dishes 6, wherein, the contained angle between the radial direction in guide plate 13 and pretreatment tower 3 is 20-30 degrees, evenly seted up the water conservancy diversion hole on the guide plate 13. Through setting up guide plate 13 and drainage strip 14, the ascending route of the mist of extension sintering flue gas and ozone to make mist be the heliciform motion in pretreatment tower 3, make sintering flue gas and ozone obtain abundant mixture and contact, abundant with low-valent nitrogen oxide oxidation for the high-valent nitrogen oxide that the high price is easily absorbed, guarantee denitration effect. Spray cooling treatment to the sintering flue gas through first spray set 18 in pretreatment column 3 to avoid the sintering flue gas of higher temperature to influence the oxidative activity of ozone, through dust and droplet in the 15 desorption sintering flue gas of first defogging device, alleviate follow-up SOx/NOx control tower 27's processing pressure, make sintering flue gas and ozone obtain abundant mixture and contact through ozone mixing arrangement, abundant with low-valent nitrogen oxide oxidation for the high-valent nitrogen oxide that the high-valent readily absorbed, guarantee denitration effect.
As shown in fig. 3, a plurality of second demisting devices 29 are sequentially arranged in the desulfurization and denitrification tower 27 from top to bottom, a plurality of second spraying devices 30 and a second gas distributor 31, the bottom of the desulfurization and denitrification tower 27 is respectively communicated with the plurality of second spraying devices 30 through a second circulation pipeline 32, a second circulation pump 33 is arranged on the second circulation pipeline 32, the sintering flue gas is fully contacted with the alkali liquor sprayed out of the spraying devices, high-valence nitrogen oxides in the sintering flue gas are absorbed and reacted by the alkali liquor, the desulfurization and denitrification effect is ensured, one side of the lower part of the desulfurization and denitrification tower 27 is communicated with an alkali liquor supply tank 34 through a pipeline, the alkali liquor is supplied to the desulfurization and denitrification tower 27 through the alkali liquor supply tank 34, so that the spraying liquid in the second spraying devices 30 reaches the alkalinity required for desulfurization and denitrification, and the desulfurization and denitrification effect is further ensured. The first gas distributor 22 and the second gas distributor 31 have the same structure, and sintering flue gas entering the tower is uniformly distributed by arranging the gas distributors.
Wherein the first spraying device 18 and the second spraying device 30 have the same structure, as shown in fig. 4, the first spraying device 18 comprises a water inlet main pipe 19 which is transversely arranged, one end of the water inlet main pipe 19 is communicated with the first circulating pipe 23, the other end of the water inlet main pipe 19 penetrates through one side of the pretreatment tower 3, and is fixed on the inner side wall of the other side of the pretreatment tower 3 opposite to the pretreatment tower through a support seat 21, a plurality of water inlet branch pipelines 20 communicated with the water inlet main pipeline 19 are arranged at equal intervals on two sides of the water inlet main pipeline 19, wherein, the water inlet branch pipes 20 can be distributed on two sides of the water inlet main pipe 19 in a one-to-one corresponding manner, or the inlet branch pipes 20 are distributed at the two sides of the inlet main pipe 19 in a staggered mode, the free ends of the inlet branch pipes 20 are fixedly arranged on the inner side wall of the pretreatment tower 3 through the supporting seat 21, a plurality of nozzles are arranged on the inlet branch pipes 20, and the spraying directions of the nozzles are opposite to the gas flow direction in the pretreatment tower 3. Through setting up spray set, can improve the spray regime of nozzle, the reinforcing sprays the effect.
Wherein, as shown in fig. 6, the ozone gas distribution plate 6 includes the main pipe 7 of admitting air, outside annular honeycomb duct 8, inboard annular honeycomb duct 9 and two radial communicating pipes 10, two radial communicating pipes 10 are the cross structure, and two radial communicating pipes 10 all communicate with outside annular honeycomb duct 8 and inboard annular honeycomb duct 9, 7 one end of the main pipe of admitting air is linked together with two radial communicating pipes 10, the main pipe 7 other end of admitting air runs through pretreatment tower 3 and is linked together through pipeline and the ozone generator 25 that is located the pretreatment tower 3 outside, outside annular honeycomb duct 8, evenly seted up a plurality of air vents 11 on inboard annular honeycomb duct 9 and two radial communicating pipes 10.
The first demisting device 15 and the second demisting device 29 have the same structure, as shown in fig. 5, the first demisting device 15 is composed of a plurality of plates 16, preferably polypropylene plates 16, arranged in parallel in the radial direction of the pretreatment tower 3, the plates 16 are in a streamline structure, and the plurality of plates 16 are fixed on the inner side wall of the pretreatment tower 3 through a support frame 17. The sintering flue gas after desulfurization and denitration treatment flows through the plate 16 at a certain speed, and because the plate 16 is of a streamline structure, the flue gas is changed in motion direction rapidly and continuously, and due to the action of centrifugal force and inertia, fog drops in the sintering flue gas collide with the plate 16 to be converged into water flow, and fall to the inner bottom of the desulfurization and denitration tower 27 for cyclic utilization under the action of gravity, and the purified sintering flue gas after efficient demisting and dedusting is discharged out of the tower through the flue gas purification outer discharge pipe 35.
The equipment realizes the integration of low-temperature desulfurization and denitrification, has high removal efficiency, stable equipment operation and low investment and operation cost, and is convenient for industrial application.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (5)
1. The integrated treatment equipment for desulfurization and denitrification of the flue gas of the sintering machine is characterized by comprising the sintering machine, a flue gas chiller, a pretreatment tower and a desulfurization and denitrification tower, wherein a flue gas outlet of the sintering machine is communicated with an inlet of the flue gas chiller through a pipeline, an outlet of the flue gas chiller is communicated with a first flue gas inlet at the lower part of the pretreatment tower through a pipeline, a first flue gas outlet at the top of the pretreatment tower is communicated with a second flue gas inlet at the lower part of the desulfurization and denitrification tower through a pipeline, a second flue gas outlet is arranged at the top of the desulfurization and denitrification tower and is connected with a purified flue gas outer pipe, an ozone mixing device, a plurality of first demisting devices, a plurality of first spraying devices and a first gas distributor are sequentially arranged in the pretreatment tower from top to bottom, and the bottom of the pretreatment tower is respectively communicated with the plurality of first spraying devices through a first circulating pipeline, the first circulating pipeline is provided with a first circulating pump, the ozone mixing device comprises a plurality of ozone gas distribution disks which are sequentially arranged from top to bottom and a flow guide mechanism arranged between every two adjacent ozone gas distribution disks, and the plurality of ozone gas distribution disks are respectively communicated with an ozone generator positioned on the outer side of the pretreatment tower through pipelines;
the device comprises a desulfurization and denitrification tower and is characterized in that a plurality of second demisting devices, a plurality of second spraying devices and a second gas distributor are sequentially arranged in the desulfurization and denitrification tower from top to bottom, the bottom of the desulfurization and denitrification tower is respectively communicated with the plurality of second spraying devices through a second circulating pipeline, a second circulating pump is arranged on the second circulating pipeline, and one side of the lower part of the desulfurization and denitrification tower is communicated with an alkali liquor supply tank through a pipeline.
2. The integrated desulfurization and denitrification treatment equipment for the flue gas of the sintering machine according to claim 1, wherein the flow guide mechanism comprises a plurality of flow guide plates and a plurality of flow guide strips, the flow guide plates are distributed on the inner side wall of the pretreatment tower between two adjacent ozone distribution disks in a staggered manner from top to bottom, the flow guide plates are arranged obliquely upwards, and the flow guide strips are arranged on the inner side wall of the pretreatment tower between two adjacent ozone distribution disks.
3. The integrated desulfurization and denitrification treatment equipment for the flue gas of the sintering machine according to claim 2, wherein an included angle between the guide plate and the inner radial direction of the pretreatment tower is 20-30 degrees, and the guide plate is uniformly provided with guide holes.
4. The integrated desulfurization and denitrification treatment equipment for the flue gas of the sintering machine according to claim 1, wherein the first spraying device and the second spraying device have the same structure, the first spraying device comprises a transversely arranged main water inlet pipeline, one end of the main water inlet pipeline is communicated with the first circulating pipeline, the other end of the main water inlet pipeline penetrates through one side of the pretreatment tower and is fixed on the inner side wall of the other side of the pretreatment tower through a supporting seat, a plurality of branch water inlet pipelines communicated with the main water inlet pipeline are arranged on two sides of the main water inlet pipeline at equal intervals, the free ends of the branch water inlet pipelines are fixedly arranged on the inner side wall of the pretreatment tower through the supporting seat, a plurality of nozzles are arranged on the branch water inlet pipeline, and the spraying directions of the nozzles are opposite to the gas flow direction in the pretreatment tower.
5. The integrated desulfurization and denitrification treatment equipment for the flue gas of the sintering machine as claimed in claim 1, wherein the first demisting device and the second demisting device are identical in structure, the first demisting device is composed of a plurality of plates arranged in parallel in the radial direction of the pretreatment tower, the plates are in streamline structures, and the plurality of plates are fixed on the inner side wall of the pretreatment tower through a support frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922106296.6U CN212974680U (en) | 2019-11-29 | 2019-11-29 | Sintering machine flue gas desulfurization denitration integration treatment facility |
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| CN201922106296.6U CN212974680U (en) | 2019-11-29 | 2019-11-29 | Sintering machine flue gas desulfurization denitration integration treatment facility |
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