CN217962948U - Sintering machine head flue gas treatment device - Google Patents

Sintering machine head flue gas treatment device Download PDF

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CN217962948U
CN217962948U CN202221687038.7U CN202221687038U CN217962948U CN 217962948 U CN217962948 U CN 217962948U CN 202221687038 U CN202221687038 U CN 202221687038U CN 217962948 U CN217962948 U CN 217962948U
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dust
flue gas
area
sintering machine
bag
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李康
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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Abstract

A sintering machine head flue gas treatment device comprises a dust remover (1) and a desulfurization and denitrification device (2); a flue gas outlet of the dust remover (1) is connected to the desulfurization and denitrification device (2) through an air pipe (L1); a fan (3) is arranged on the air pipe (L1); the method is characterized in that: according to the trend of flue gas, an electric area (4), a transition area (5) and a bag area (6) are sequentially arranged in the dust remover (1); the lower parts of the electric area (4) and the bag area (6) are provided withA dust hopper of the dust remover. Adopt the utility model discloses can reduce the dust content in the sintering machine aircraft nose flue gas by a wide margin, solve the high problem of current sintering machine aircraft nose dust remover dust emission concentration, can also adsorb the SO in the small part flue gas simultaneously 2 So as to reduce the treatment load of subsequent flue gas purification facilities, achieve the standard of ultralow emission and have good economic benefit.

Description

Sintering machine head flue gas treatment device
Technical Field
The utility model relates to a processing technology of sintering machine aircraft nose smoke and dust, concretely relates to sintering machine aircraft nose flue gas processing apparatus belongs to sintering smoke and dust processing technology field.
Background
With the development of modern industry, the quality of life of people is improved, the requirement on environmental protection is higher and higher, and safe production and clean production become civilized marks of modern enterprises.
In the sintering production of the steel industry, the sintering machine head has high flue gas dust content, complex flue gas components and high flue gas moisture content, the uncontrollable factors of the flue gas are more caused by large operation fluctuation of the production process, and the technical requirement for realizing ultralow emission is high.
The sintering machine head smoke has the following characteristics:
(1) The sintering flue gas amount is large and the fluctuation is large: the air quantity per unit sintering area is about 4000-6000 m per hour 3 Per ton of sinter.
(2) The dust carried by the sintering flue gas is large (1-5 g/Nm) 3 )。
(3) The temperature fluctuation of the flue gas is large (80-180 ℃).
(4) The water vapor content of the flue gas is relatively high (8-20%), and the dew point temperature is relatively high (more than or equal to 60 ℃).
(5) The oxygen content of the smoke is high (15-18%).
(6) The smoke has complex components: containing SO 2 K, na, si, mg, al, zn, as, cl, fe, ca, etc.
(7)SO 2 And NO x Concentration: SO 2 The concentration is 300-5000 mg/Nm 3 ，NO x Concentration: 150-600 mg/Nm 3 。
(8) The particle size of the dust in the flue gas is as follows: 25% of more than or equal to 50 mu m, 40% of 10-50 mu m and 35% of less than or equal to 10 mu m.
At present, almost all dust collectors adopted by the flue gas of the head of the sintering machine are electric dust collectors, and other flue gas purification facilities (desulfurization and denitrification) are subsequently matched, as shown in fig. 1 (the flue gas treatment prior art of the head of the sintering machine): the flue gas of the head of the sintering machine enters the electric dust remover from the inlet of the electric dust remover, is discharged from the outlet of the electric dust remover after being subjected to electric dust removal, and is pumped into the desulfurization and denitrification device through the air pipe and the fan for desulfurization and denitrificationCarrying out sulfur denitration treatment, and then discharging; the dust obtained after the electric dust removal in the electric dust remover falls into the dust hopper of the electric dust remover below the electric dust remover, and the dust hopper is conveyed away after being fully collected, and generally can be directly used as a sintering raw material to participate in the batching again. In the prior art, after an electric dust remover removes dust from the smoke of a head of a sintering machine, the dust concentration can be reduced to 30-50 mg/Nm 3 . But because the electric field intensity is even in the current electrostatic precipitator, so its dust collection efficiency is lower, still has a lot of dusts in the flue gas behind the electrostatic precipitator, and these dusts are the fine dust of high specific resistance, and the electrostatic precipitator is difficult to the entrapment, and it is very difficult to lean on the dust precipitator further to reduce the dust emission concentration of sintering machine aircraft nose flue gas. And the dust in the flue gas of the head of the sintering machine can also cause adverse effects on the subsequent desulfurization and denitrification process and equipment. Therefore, as environmental and emissions requirements become more stringent, it is desirable to reduce the dust content of the sintering machine head flue gas as low as possible. Meanwhile, because the dust collected by the electric dust collector contains a lot of chlorides, alkali metals and the like which are substances harmful to sintering, the dust directly used as a sintering raw material participates in proportioning again to influence the quality of the sintered ore, and when the harmful substances are accumulated excessively in the sintered ore, the dust can also cause adverse effects on the subsequent blast furnace iron making.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the above-mentioned prior art, the utility model provides a sintering machine aircraft nose flue gas processing apparatus. The device of the utility model comprises a dust remover and a desulfurization and denitrification device, an electric area, a transition area and a bag area are arranged in the dust remover. Be equipped with a plurality of electric fields that intensity is different in the electric district, be equipped with sprinkler in the transition district, be equipped with a plurality of filter bags that the mesh diameter is different in the bag district. The sintering machine head flue gas is subjected to dust removal treatment through an electric zone, a transition zone and a bag zone in the dust remover in sequence, and the flue gas subjected to dust removal treatment is discharged after being treated by a desulfurization and denitrification device. In the utility model, the electric field intensity in the electric area and the mesh diameter of the filter bag show the variation trend of strength and weakness, and can effectively collect dust at all levels in the head flue gas of the sintering machine in a targeted manner, thereby greatly reducing the dust content in the head flue gas of the sintering machine; spraying of special in the transition zoneThe additive is used for treating the flue gas, namely the additive can further improve the dust removal effect and adsorb SO in the flue gas 2 So as to reduce the processing load of subsequent flue gas purification facilities, achieve the ultralow emission standard and have good economic benefit.
According to the utility model discloses a first embodiment provides a sintering machine aircraft nose flue gas processing apparatus.
A flue gas treatment device for a head of a sintering machine comprises a dust remover and a desulfurization and denitrification device. The flue gas outlet of the dust remover is connected to the desulfurization and denitrification device through an air pipe. The air pipe is provided with a fan. And an electric area, a transition area and a bag area are sequentially arranged in the dust remover according to the trend of the flue gas. Dust collector ash hoppers are arranged below the electric area and the bag area.
The utility model discloses in, the dust remover is still including setting up the dust remover horn mouth in the flue gas entrance. The large opening end of the bell mouth of the dust remover is connected with the electric area. Preferably, an air flow distribution plate is arranged in the bell mouth of the dust remover. Preferably, the number of the gas flow distribution plates is plural. According to the trend of the flue gas, the sizes of the air flow distribution plates are sequentially increased along with the widening of the bell mouth of the dust remover.
Preferably, the air distribution plate is provided with a plurality of rows of openings along the height direction of the dust remover. Wherein, along the direction of the middle up both sides down of airflow distribution plate, the diameter of each row of trompil increases in proper order, and the quantity of each row of trompil reduces in proper order.
The utility model discloses in, be equipped with sprinkler in the transition zone. The sprinkler is arranged at the top and the bottom in the transition area, and the nozzle of the sprinkler faces the center of the transition area.
Preferably, the device also comprises an additive bin and a nitrogen conveying pipeline. The additive bin is connected with the spraying device through an additive conveying pipeline. The nitrogen delivery line is also connected to the spraying device.
The utility model discloses in, be equipped with m electric fields in the electric zone. And the strength of each electric field is sequentially enhanced according to the trend of the smoke. An electric area ash bucket is arranged below each electric field. Wherein m is 1 to 8, preferably 2 to 4.
In the utility model discloses, be equipped with n sub-pocket district in the pocket district. And a filter bag is arranged between the adjacent sub-bag areas. The filter bag is provided with meshes which are uniformly distributed. According to the smoke trend, the diameters of meshes on the filter bags are sequentially increased. Wherein n is 1 to 8, preferably 2 to 4. And a bag area ash hopper is arranged below each sub-bag area.
The utility model discloses in, the device is still including setting up additive scraper conveyor, detection and feed divider, the mixing arrangement in the pocket area ash bucket low reaches. Wherein, the additive scraper conveyor is arranged below the discharge hole of the ash bucket in the bag area. The discharge end of the additive scraper conveyor is connected to the feed inlet of the detection and distribution device. The first discharge port of the detection and material distribution device is connected to the additive conveying pipeline through the additive supplement pipeline. The second discharge hole of the detection and distribution device is connected to the feed inlet of the mixing device.
Preferably, the device also comprises a circulating bin and a first crushing device which are arranged between the additive scraper conveyor and the detecting and distributing device. Wherein, the discharge end of the additive scraper conveyor is connected to the feed inlet of the circulating bin. The discharge hole of the circulating bin is connected to the feed inlet of the first crushing device. The discharge hole of the first crushing device is connected to the feed inlet of the detection and distribution device.
The utility model discloses in, the discharge gate below of electricity district ash bucket is equipped with sintering ash scraper conveyor. The discharge end of the sintering ash scraper conveyor is connected with the feed inlet of the mixing device.
Preferably, the device also comprises a sintering dust bin and a second crushing device which are arranged between the sintering dust scraper conveyor and the mixing device. Wherein, the discharge end of the sintering dust scraper conveyor is connected to the feed inlet of the sintering dust bin. And a discharge hole of the sintering dust bin is connected to a feed inlet of the second crushing device. The discharge hole of the second crushing device is connected to the feed inlet of the mixing device.
The utility model discloses in, the device is still including dissolving washing device, filter equipment, drying device, third breaker, sintering feed proportioning system. And the discharge hole of the mixing device is connected to the feed inlet of the dissolving and washing device. The discharge hole of the dissolving and washing device is connected to the feed inlet of the filtering device. The solid outlet of the filtering device is connected to the feed inlet of the drying device. The discharge hole of the drying device is connected to the feed inlet of the third crushing device. And the discharge hole of the third crushing device is connected to the sintering proportioning system.
Preferably, the device also comprises a purification and impurity removal device, an extraction device and a valuable metal recovery device. Wherein, the liquid outlet of the filtering device is connected to the inlet of the purifying and impurity-removing device. The outlet of the purification and impurity removal device is connected to the inlet of the extraction device. The outlet of the extraction device is connected to the valuable metal recovery device. Preferably, the liquid outlet of the filtering device is connected with the liquid inlet of the dissolving and washing device.
The utility model discloses in, the discharge gate below of electricity district ash bucket and bag district ash bucket all is equipped with double-deck unloading valve. The discharge outlets of the ash bucket in the electric area and the ash bucket in the bag area are both provided with a vibrating device. Preferably, heating devices are further arranged in the electric area ash bucket and the bag area ash bucket.
Preferably, the upper parts of the side walls of the electric area ash bucket and the bag area ash bucket are respectively provided with a loading level indicator, and the lower parts of the side walls are respectively provided with a discharging level indicator. Preferably, the side walls of the electric area ash bucket and the bag area ash bucket are also provided with temperature detection devices.
According to the utility model discloses a second embodiment provides a sintering machine aircraft nose flue gas processing method.
A method for treating sintering machine head flue gas or using the device in the first embodiment, the method comprises the following steps:
1) The smoke of the head of the sintering machine is connected into a smoke inlet of a dust remover, the smoke is firstly subjected to airflow dispersion through an airflow distribution plate arranged at a bell mouth of the dust remover, and then the smoke uniformly enters an electric area in a dispersed manner.
2) The flue gas passes through each electric field in the electric field in proper order, and along with the increase of electric field intensity, the large granule dust and the medium particle dust in the flue gas subside after the electric charge and fall into the electric field ash bucket of each electric field below, and the flue gas behind the desorption medium particle dust gets into the transition zone.
3) In the transition zone, the spraying device sprays the additive into the flue gas, and the additive enters the bag zone along with the flue gas. The additive forms a wrap coating on the filter bags in the bag section. The small particle dust in the flue gas is adsorbed on the surface of the filter bag covered with the additive, the filter bag starts to clean ash along with the increase of the thickness of the small particle dust covered on the filter bag, and the small particle dust is cleaned and falls into the bag area ash bucket below each sub-bag area.
4) The flue gas after dust removal enters a desulfurization and denitrification device under the action of a fan, and is discharged after being subjected to desulfurization and denitrification treatment.
In the present invention, the method further comprises:
5) And (3) discharging the medium and large particle dust falling into the electric area dust hopper in the step 2) into a sintered dust scraper conveyor, and conveying the medium and large particle dust to a sintered dust bin by the sintered dust scraper conveyor. And the medium and large particle dust is crushed by the second crushing device and then conveyed to the mixing device.
6) And (3) discharging the small particle dust falling into the ash hopper of the bag area in the step 3) into an additive scraper conveyor, and conveying the small particle dust to a circulating bin by the additive scraper conveyor. The piled small-particle dust is agglomerated in the circulating bin, and the agglomerated dust is conveyed to the mixing device after being crushed by the first crushing device.
7) The mixing device mixes the dust from the sintering dust bin and the circulating bin and then leads the mixture into the dissolving and washing device. And the dissolving and washing device is used for dissolving and washing the mixed dust. Filtering the dissolved and washed dust in a filtering device to obtain a filter cake and a filtrate.
8) And circulating part of the filtrate to a dissolving and washing device to continuously participate in the dissolving and washing of the dust, introducing the rest filtrate into a purification and impurity removal device for purification and impurity removal, and extracting by an extraction device to obtain the valuable metal.
9) Drying the filter cake by a drying device, and crushing by a third crushing device to obtain iron-containing powder; and conveying the iron-containing powder to a sintering batching system to complete sintering batching, and sintering.
Preferably, the step 6) further includes a step of detecting and distributing the dust crushed by the first crushing device, specifically: the dust crushed by the first crushing device is conveyed to the detection and distribution device. The detection and distribution device detects the components of the dust, and when the additive content in the dust exceeds 40 percent (preferably exceeds 50 percent), the detection and distribution device conveys the dust containing the additive to a spraying device in a transition area. Otherwise, the detection and material distribution device conveys the dust to the mixing device.
In step 3) of the present invention, the additive is calcium carbonate. Preferably, the additive sprayed by the spraying device and SO in the flue gas are in the transition zone 2 And reacting to form a desulfurization byproduct, wherein the desulfurization byproduct enters the bag area and then falls into an ash hopper of the bag area.
The problem to sintering machine aircraft nose dust remover dust emission concentration is too high among the prior art, the utility model provides a sintering machine aircraft nose flue gas processing apparatus. The device of the utility model comprises a dust remover and a desulfurization and denitrification device, an electric area, a transition area and a bag area are arranged in the dust remover. Be equipped with a plurality of electric fields that intensity is different in the electric district, be equipped with sprinkler in the transition district, be equipped with a plurality of filter bags that mesh diameter is different in the bag district. The flue gas of the head of the sintering machine sequentially passes through an electric area, a transition area and a bag area in the dust remover to be subjected to dust removal treatment, and the flue gas subjected to dust removal treatment is treated by a desulfurization and denitrification device and then is discharged. The utility model discloses in, electric field intensity in the electric zone and the mesh diameter of filter bag present the trend of change of size of power, can have corresponding ground to carry out effective collection to the dust at different levels in the sintering machine aircraft nose flue gas, and then can reduce the dust content in the sintering machine aircraft nose flue gas by a wide margin (through experimental study, adopt this application can reduce the dust content of sintering machine aircraft nose flue gas to 10mg/Nm 3 ) (ii) a The special additive is sprayed in the transition area to treat the flue gas, namely the flue gas can adsorb SO in the flue gas while the dedusting effect is further improved 2 So as to reduce the treatment load of subsequent flue gas purification facilities, achieve the ultralow emission standard and have good economic benefit.
The utility model discloses in, sintering machine aircraft nose flue gas processing apparatus includes the dust remover and sets up the SOx/NOx control device in the dust remover low reaches. According to the trend of the flue gas, an electric area, a transition area and a bag area are arranged in the dust remover, and dust remover ash buckets are arranged below the electric area and the bag area. This application is equipped with a plurality of electric fields in the dust remover electricity district, according to the flue gas trend, and the intensity of each electric field strengthens in proper order, and the below of every electric field all is equipped with the electricity district ash bucket. The number of electric fields in the electric field can be set as desired, for example, the number of electric fields is 1 to 8, preferably 2 to 4. For example, be equipped with three electric field in the electric field, according to the flue gas trend, be first electric field, second electric field, third electric field in proper order, the below of every electric field all is equipped with the electric field ash bucket. Wherein the intensity of the first electric field is less than that of the second electric field and less than that of the third electric field. After the smoke of the head of the sintering machine enters the electric area, because the strength of the first electric field is lowest, large-particle dust in the smoke falls into an electric area ash bucket below the first electric field after being charged in the area; the electric field intensity of the second electric field and the third electric field is increased in sequence, and the middle particle dust in the flue gas is charged in the region in sequence and then falls into an electric area dust hopper below the second electric field and the third electric field in sequence in a settling manner. From this, each electric field strength presents strong and weak trend of change in this application dust remover's the electric zone, can have corresponding ground to carry out effective collection to the dust at different levels in the sintering machine aircraft nose flue gas, improves dust collection efficiency, practices thrift the energy consumption simultaneously.
The utility model discloses be equipped with a plurality of sub-pocket districts in the dust remover pocket district, the below in every sub-pocket district all is equipped with pocket district ash bucket. And a filter bag is arranged between the adjacent sub-bag areas, and meshes which are uniformly distributed are arranged on the filter bag. According to the smoke trend, the diameters of meshes on the filter bags are sequentially increased. The number of the sub-bag areas in the bag area can be the same as that of the filter bags, or a plurality of filter bags are arranged in each sub-bag area, and the diameters of meshes on the filter bags in each sub-bag area are the same. The number of sub-pockets within a pocket can be set as desired, for example the number of filter pockets is from 1 to 8, preferably from 2 to 4. For example, three filter bags are arranged in the bag area, and a first filter bag, a second filter bag and a third filter bag are arranged in sequence according to the trend of the smoke. Wherein the mesh diameter of the first filter bag is smaller than that of the second filter bag and smaller than that of the third filter bag. Correspondingly, the bag area is divided into three sub-bag areas by the three filter bags, namely a first sub-bag area, a second sub-bag area and a third sub-bag area in sequence, and a bag area ash bucket is arranged below each sub-bag area, as shown in fig. 2. After the dust is removed by the electric zone, the large and medium particle dust in the smoke of the sintering machine head is removed, and then the smoke is removed by the first sub-bag zone, the second sub-bag zone and the third sub-bag zone in sequence, so that the content of small particle dust in the smoke is greatly reduced. Therefore, on the basis that a plurality of electric fields with different intensities are arranged in the electric area of the dust remover, a plurality of filter bags with different mesh diameters are arranged in the bag area, so that the dust removal efficiency can be greatly improved, the problem that small-particle dust and micro-fine dust in the smoke of the head of the sintering machine in the prior art are difficult to remove and collect is solved, the dust content in the smoke of the head of the sintering machine can be greatly reduced, and the ultralow emission standard is reached.
The utility model discloses in, between transition district setting electric district and the bag district in the dust remover, all set up sprinkler from top to bottom in the transition district. The spraying device is provided with two inlets, one inlet is connected with an additive conveying pipeline, and the input end of the additive conveying pipeline is connected with an additive bin; the other inlet is connected with compressed nitrogen (for protection). The export of sprinkler sets up a plurality of nozzles, and a plurality of nozzles set up towards transition district center to no dead angle when guaranteeing sprinkler to spray in the transition district can spray the additive homodisperse ground in whole transition district. Wherein, the additive can be calcium carbonate. In the utility model, the additive can be mixed with SO in the flue gas 2 Reacting to form a small amount of desulfurization byproducts, and reducing SO in the flue gas after dust removal 2 Thereby reducing the processing load of the subsequent flue gas purification facility; meanwhile, the residual additive enters the bag area along with the flue gas, and the additive forms a coating layer on the filter bag of the bag area to cover the surface of the filter bag to protect the filter bag and prevent sharp dust ions from wearing the filter bag; in addition, in the bag area of the dust collector, small-particle dust which is difficult to remove and has high specific resistance and fine granularity (the dust is difficult to charge in the electric area and cannot be collected) in the smoke is adsorbed on the surface of the filter bag covered with the additive, so that the filter bag can easily clean and collect the dust in a back blowing dust cleaning operation, the dust cleaning of the filter bag is more thorough, and the dust removal efficiency is further improved.
Preferably, the dust remover further comprises a dust remover bell mouth arranged at the flue gas inlet. Wherein, the small end of the horn mouth of the dust remover is connected with the flue gas inlet of the dust remover, and the large end (namely the large opening end) of the horn mouth of the dust remover is connected with the electric area. A plurality of air flow distribution plates are arranged in the horn mouth of the dust remover, the size of each air flow distribution plate is sequentially increased along with the widening of the horn mouth of the dust remover until the size of the air flow distribution plate close to the electric area is basically consistent with that of the electric area of the dust remover. And a plurality of rows of open holes are arranged on the air flow distribution plate along the height direction of the dust remover. Wherein, along the direction of the middle up both sides down of airflow distribution plate, the diameter of each row of trompil increases in proper order, and the quantity of each row of trompil reduces in proper order. It should be noted that, as described herein, the diameters of the openings increase sequentially from the middle to the upper and lower sides, each size of opening may be provided with only one row, for example, from the middle to the upper and lower sides, a row of small holes, a row of middle large holes, and a row of large holes … … are sequentially provided, that is, a row of the smallest size of opening (i.e., small hole) is provided in the middle of the air flow distribution plate, and then the openings of other sizes are distributed symmetrically up and down; several rows of openings with the same size can also be arranged, for example, in fig. 4, 5 rows of small holes with the smallest size are arranged in the middle of the air flow distribution plate, and then the middle hole, the middle large hole and the large hole … … are sequentially arranged from the middle to the upper side and the lower side. Correspondingly, as the diameter of each row of the open holes is increased, the number of the open holes in each row is reduced in sequence. This application sets up the minimum most trompil of size with airflow distribution plate's centre according to the flow law of flue gas, then from the size crescent of middle toward upper and lower both sides trompil, the quantity of trompil then reduces gradually, such big or small pore distribution can be with the more even of flue gas dispersion, cooperates subsequent strong and weak electric field, can collect the large granule dust high efficiently, and the flue gas velocity of flow is smooth and easy simultaneously, pressure stability, and dust collection efficiency is higher.
To the direct problem that participates in the sintering batching once more and can influence the sinter quality of the raw materials of dust that collects with electrostatic precipitator among the prior art, the utility model discloses dust that dust classification device collected electric zone ash bucket and bag district ash bucket of dust remover is still set up and is handled. The utility model discloses in, the device still includes additive scraper conveyor, detection and feed divider, the mixing arrangement that sets gradually in bag district ash bucket low reaches. The additive scraper conveyor is used for conveying small-particle dust collected in the bag area dust hopper to the detection and distribution device. Because the small-particle dust collected in the ash hopper of the bag area not only contains dust particles in the flue gas, but also contains additives and other substances sprayed in the transition area, the component detection of the small-particle dust is carried out by the detection and distribution device. When the additive content in the dust is detected to exceed 40 percent (preferably exceed 50 percent), the detection and material distribution device conveys the dust containing the additive to a spraying device in a transition area through an additive supplement pipeline and an additive conveying pipeline, wherein the additive supplement pipeline and the additive conveying pipeline are both provided with conveying pumps. On the contrary, when the content of the additive in the dust is detected to be reduced to a certain degree, the detection and material distribution device distributes the dust to the mixing device. For the storage and the transfer of tiny particle dust, the utility model discloses still set up circulation storehouse and first breaker between additive scraper conveyor and detection and feed divider. At this time, the additive scraper conveyor first conveys the small-particle dust trapped in the bag-area dust hopper into the circulating bin. Because these dust particles are thinner, contain a small amount of moisture again, piled up in the circulation storehouse for a long time and easily agglomerate, therefore add first breaker, carry out the breakage to the dust after the agglomeration, then carry to in detecting and feed divider again. The utility model discloses according to the composition content of each material in the tiny particle dust in the bag district ash bucket, carry out classification to the tiny particle dust, add additive replenishment pipeline on the basis that sets up the additive storehouse, carry out cyclic utilization to the fly ash that contains the additive (being tiny particle dust) that collects in the bag district ash bucket, the make full use of resource, the utilization ratio is greatly improved, after circulating many times, the content of additive reduces to the certain degree in the dust, then the dust discharge circulation in the storehouse that will circulate and get into follow-up other handling processes, the validity of additive has been guaranteed, also make the utilization maximize of dust.
Similarly, the utility model discloses be equipped with sintering ash scraper conveyor below the discharge gate of electricity district ash bucket. The discharge end of the sintering ash scraper conveyor is connected with the feed inlet of the mixing device. Namely, the scraper conveyor for the sintering ash is used for conveying the medium and large particle dust collected in the ash bucket of the electric area to the mixing device. In order to facilitate the storage and the transfer of large and medium particle dust, the utility model discloses still set up sintering dust storehouse, second breaker (for example, the thin breaker) between sintering dust scraper conveyor and mixing arrangement. At the moment, the scraper conveyor for the sintering dust firstly conveys the medium and large particle dust collected in the ash bucket of the electric area to the sintering dust bin. Because the dust particles are larger, a second crushing device is additionally arranged to finely crush the medium and large particle dust and then convey the medium and large particle dust into the mixing device. Obviously, the utility model discloses after the tiny particle dust to the collection of pocket area ash bucket carries out classification through the composition detection, handle the final mix-together of dust of collecting in electric district, transition district and the pocket area in the dust remover, practiced thrift the cost, also improved resource utilization.
The utility model discloses in, sintering machine aircraft nose flue gas processing apparatus still includes the dissolving and washing device, the filter equipment that set gradually in mixing arrangement low reaches and drying device, third breaker, the sintering feed proportioning system that set gradually in filter equipment's solid export low reaches to and purification edulcoration device, extraction element, valuable metal recovery unit that set gradually in filter equipment's liquid export low reaches. And mixing the medium and large particle dust from the sintering dust bin and the small particle dust from the circulating bin in a mixing device, and then carrying out dissolving and washing and filtering to obtain a filter cake and filtrate. Wherein, the filtrate is purified, decontaminated and extracted to obtain valuable metals. In addition, part of the filtrate can be recycled to the dissolution washing device to participate in the dissolution washing of the dust. And drying and crushing the filter cake to obtain iron-containing powder with low impurity content and high iron grade, and enabling the iron-containing powder to enter a sintering batching system to participate in sintering batching. The utility model discloses be provided with the dust remover and distinguish electrically, the final dust that transition district and bag district collected is mixed and is handled together, after categorised classification treatment, valuable metal has not only been obtained, and obtained impurity content is few, the high iron content powder of iron grade, these powders resume to participate in the sintering batching, go the sintering at last again, improve the sinter quality, the dust of having solved among the prior art dust remover collection directly participates in the sintering batching once more as the raw materials and can influence the sinter quality, reduce the problem of qualified product volume. Therefore, all levels of dust are utilized to the maximum extent, the cost is saved, and the resource utilization rate is greatly improved.
As the preferred scheme, the utility model discloses all be equipped with double-deck unloading valve in the discharge gate below of electric zone ash bucket and bag district ash bucket. The upper parts of the side walls of the electric area ash bucket and the bag area ash bucket are both provided with a material loading level indicator, and the lower parts of the side walls are both provided with a material unloading level indicator. Wherein, the double-layer dust discharge valve controls the dust in the dust hopper (including the electric region dust hopper and the bag region dust hopper) of the dust remover to drop and stop. The loading level meter controls the time node of the double-layer ash discharging valve for opening ash discharging, the unloading level meter controls the time node of the double-layer ash discharging valve for stopping ash discharging, and the ash discharging automation level is high. In addition, for preventing the export from being plugged up by the dust, the discharge gate department of electric zone ash bucket and bag district ash bucket all is equipped with vibrating device, opens vibrating device when the dust unloads promptly. Heating devices are also arranged in the electric area ash bucket and the bag area ash bucket. And temperature detection devices are also arranged on the side walls of the electric area ash bucket and the bag area ash bucket. The temperature detection device detects the dust temperature in the dust hopper of the dust collector, and when the dust temperature is lower (for example, the dust temperature is lower than 55 ℃), the heating device is started to heat the dust so as to prevent moisture condensation and hardening in the dust, thereby ensuring that the shape and the property of the dust are more stable.
Based on above-mentioned sintering machine aircraft nose flue gas processing apparatus, the utility model discloses still provide a sintering machine aircraft nose flue gas processing method. In the method, the sintering machine head flue gas is subjected to dust removal treatment sequentially through an electric area, a transition area and a bag area in a dust remover, the flue gas subjected to dust removal treatment is treated by a desulfurization and denitrification device and then discharged, and the dust collected by an electric area ash bucket and a bag area ash bucket of the dust remover is subjected to subsequent classification and classification treatment, so that on one hand, required additives in the transition area can be supplemented, and meanwhile, valuable metals and high-grade iron-containing powder can be obtained. For example, set up electric field quantity in the dust remover electric zone to 3, also set up the sub-pocket district quantity in the dust remover pocket district to 3, promptly the utility model discloses the method mainly includes following step:
1) The flue gas of the head of the sintering machine is connected to an inlet of a dust remover, the flue gas firstly enters a horn mouth of the dust remover at the front end of the dust remover, and after the horn mouth of the dust remover is subjected to airflow dispersion by a plurality of airflow distribution plates, the flue gas can uniformly disperse and enter an electric area of the dust remover.
2) The flue gas firstly enters a first electric field in the electric zone, the electric field intensity of the first electric field is lowest, large-particle dust is charged in the zone, and meanwhile, the wind speed of the zone is lower, the dust passing speed is lower, and the large-particle dust is settled in the zone and falls into an electric zone dust hopper below. The flue gas is uniformly dispersed in sequence and then enters a second electric field and a third electric field of an electric area of the dust remover, and the middle particle dust is charged in the area in sequence and then is settled and falls into an electric area dust hopper below.
3) After the flue gas passes through the electric zone, the medium and large particle dust is collected, and the flue gas without the medium and large particle dust enters the transition zone of the dust remover. In the transition zone, a spraying device sprays an additive with specific granularity, preferably CaCO, into the flue gas 3 The added additive can react with SO in the flue gas in the environment that the flue gas contains water vapor 2 Reacting to form a small amount of desulfurization byproducts, and then entering a bag area of a dust collector to fall into an ash bucket of the bag area of the dust collector. The rest additives enter the bag area of the dust collector along with the flue gas, and the additives form a wrapping coating on the filter bag in the bag area to cover the surface of the filter bag to protect the filter bag and prevent the filter bag from being abraded by sharp dust particles. Although the additive is adsorbed on the surface of the filter bag, the additive and the filter bag are not adhered tightly, small-particle dust with high specific resistance and fine particle size in smoke is adsorbed on the surface of the filter bag covered with the additive, and when the dust covered on the filter bag reaches a certain thickness, the filter bag in the bag area of the dust collector starts dust cleaning operation, so that the dust on the filter bag can be cleaned easily and falls into a dust hopper in the bag area, and the dust cleaning of the filter bag becomes more complete.
4) Because a filter bag is arranged in each sub-bag area, the meshes of the filter bags in the first sub-bag area are smaller than the meshes of the filter bags in the second sub-bag area, the meshes of the filter bags in the second sub-bag area are smaller than the meshes of the filter bags in the third sub-bag area, the dust content of flue gas is greatly reduced after the flue gas sequentially passes through the first sub-bag area, the second sub-bag area and the third sub-bag area for dust removal, then the flue gas is discharged from the outlet of a dust remover under the action of negative air draft pressure of a fan, and then enters a desulfurization and denitrification device through the air pipe via the fan for desulfurization and denitrification, and the flue gas reaching the standard is discharged again.
5) After the material loading level indicator of the ash bucket of the electric area of the dust remover detects that the dust in the ash bucket is full, the double-layer ash unloading valve below the ash bucket of the electric area of the dust remover is controlled to unload the dust into the sintered ash scraper conveyor, and meanwhile, the vibrating device at the outlet of the bottom of the ash bucket starts vibrating to prevent the dust from blocking the outlet, and the sintered ash scraper conveyor conveys the dust to a sintered dust bin. When the blanking position meter of the ash bucket of the electric area of the dust remover detects that the dust in the ash bucket is insufficient, the double-layer ash discharge valve below the ash bucket of the electric area of the dust remover is controlled to stop discharging the ash. When the temperature detection device of the ash bucket in the electric area of the dust remover detects that the temperature in the ash bucket is low (for example, the temperature of the dust is lower than 55 ℃), the heating device of the ash bucket in the electric area of the dust remover starts to heat the dust in the ash bucket so as to prevent moisture in the dust from condensation and hardening. Since the dust in the sintering dust bin belongs to medium and large particle dust, the medium and large particle dust in the sintering dust bin is further finely crushed by the fine crushing device (i.e. the second crushing device) and then is conveyed to the mixing device.
6) When the material loading level meter of the ash bucket of the dust collector bag area detects that the ash in the ash bucket is full, the double-layer ash unloading valve below the ash bucket of the dust collector bag area is controlled to unload the ash into the additive ash scraper conveyor, and meanwhile, the vibrating device at the outlet at the bottom of the ash bucket starts to vibrate to prevent the ash from blocking the outlet, and the additive scraper conveyor conveys the ash to the circulating bin. When the discharging level meter of the dust hopper in the dust collector pocket area detects that the dust in the dust hopper is insufficient, the double-layer dust discharging valve below the dust hopper in the dust collector pocket area is controlled to stop discharging the dust. When the temperature detection device of the dust hopper in the bag area of the dust collector detects that the temperature in the dust hopper is low (for example, the temperature of dust is lower than 55 ℃), the heating device of the dust hopper in the bag area of the dust collector starts to heat the dust in the dust hopper so as to prevent moisture in the dust from condensation and hardening. Because the dust in the circulating bin belongs to small-particle dust and contains a small amount of moisture, the dust is easy to agglomerate after being accumulated for a long time, and then is conveyed to the mixing device after being crushed by the first crushing device.
7) The mixing device mixes the medium and large particle dust from the sintering dust bin and the small particle dust from the circulating bin, then the mixture is introduced into the dissolving and washing device, and dilute hydrochloric acid and water are added into the dissolving and washing device to dissolve and wash the dust. After the completion of the elution, the filtrate was filtered in a filtration apparatus to obtain a cake and a filtrate.
8) Returning part of the filtrate to continuously participate in the solution washing, introducing the rest filtrate into a purification and impurity removal device for purification and impurity removal, and then extracting by an extraction device to obtain valuable metals.
9) And drying the filter cake by a drying device, crushing by a third crushing device to obtain iron-containing powder with low impurity content and high iron grade, continuously participating in sintering and proportioning, and finally sintering to obtain the sintered ore.
As a preferable scheme, the step 6) further comprises a step of detecting and distributing the dust crushed by the first crushing device, and the step specifically comprises the following steps: the dust crushed by the first crushing device is conveyed to the detection and distribution device. The detection and distribution device detects the dust components, when the additive content in the dust is detected to be higher (for example, more than 50%), the detection and distribution device divides the dust containing the additive into an additive supplement pipeline and conveys the additive supplement pipeline to a spraying device of a transition area of the dust remover, and the spraying device sprays the dust containing the additive into the transition area of the dust remover to react with the flue gas. When the additive content in the dust is low (for example, less than or equal to 50%) after being circulated for multiple times, the detection and material distribution device distributes the dust to the mixing device, and at the moment, new additive is conveyed to the spraying device in the transition area of the dust remover from the additive bin through the additive conveying pipeline, and the spraying device sprays the new additive into the transition area of the dust remover to react with the smoke, so that the dust in the smoke is recycled and treated.
In the present invention, the height of the dust collector is 2 to 100m, preferably 3 to 80m, preferably 4 to 60m, more preferably 5 to 55m, and further preferably 6 to 50m.
In the structure of the dust remover of the utility model, the length ratio of the transition zone, the electric zone and the bag zone is 1.5-30, preferably 1:1-10.
Compared with the prior art, the utility model discloses following beneficial technological effect has:
1. the utility model discloses be equipped with electric district, transition district, pocket area in proper order in the dust remover, electric field intensity in the electric district and the mesh diameter of filter bag in the pocket area present the change trend of size of power and weakness, can have corresponding ground to carry out effective collection to the dust at different levels in the sintering machine aircraft nose flue gas, and then can reduce the dust content in the sintering machine aircraft nose flue gas by a wide margin, through experimental research, adopt this application can reduce the dust content of sintering machine aircraft nose flue gas to 10mg Nm 3 (ii) a The special additive is sprayed in the transition area to treat the flue gas, namely the flue gas can adsorb SO in the flue gas while the dedusting effect is further improved 2 So as to reduce the processing load of subsequent flue gas purification facilities, achieve the ultralow emission standard and have good economic benefit.
2. The utility model discloses a dust remover has set up additive in the transition zone and has added technology to newly add system and cyclic utilization system of additive has been set up. The flue gas of the head of the sintering machine is treated by selecting a specific additive, the emission concentration of the purified flue gas dust is far less than that of a conventional head electric dust remover, and partial SO can be reduced by using the additive 2 The discharge concentration of the filter bags reduces the abrasion of the filter bags in the bag area, reduces the maintenance frequency of the filter bags in the bag area and prolongs the service life.
3. The utility model discloses according to the composition content of each material in the tiny particle dust in the bag district ash bucket, carry out classification to the tiny particle dust, add additive replenishment pipeline on the basis that sets up the additive storehouse, carry out cyclic utilization to the dust removal ash (being tiny particle dust) that contains the additive that collects in the bag district ash bucket, the make full use of resource, the utilization ratio is greatly improved, after circulating many times, the content of additive reduces to the certain degree in the dust, then the dust discharge circulation in the storehouse that will circulate and get into follow-up other handling processes, the validity of additive has been guaranteed, also make the utilization maximize of dust.
4. The utility model discloses mix the dust of collecting with dust remover electricity district, transition district and pocket area and handle together finally, after categorised classification treatment, not only obtained valuable metal, obtained moreover that impurity content is few, the iron content powder that iron grade is high, these powders resume to participate in the sintering batching, go the sintering at last again, improve the sinter quality, the problem that the dust that has solved among the prior art dust remover and collected directly participates in the sintering batching once more as the raw materials and can influence the sinter quality, reduce qualified product volume is solved. Therefore, all levels of dust are utilized to the maximum extent, the cost is saved, and the resource utilization rate is greatly improved.
5. The utility model discloses be provided with a plurality of airflow distribution plates in the dust remover horn mouth, and the size of a plurality of airflow distribution plates increases with the widening of dust remover horn mouth in proper order, until with the size unanimous of dust remover electric field area; and, the utility model discloses according to the flow law of flue gas, set up the minimum most trompil of size with airflow distribution plate's centre, then from the size crescent of middle toward upper and lower both sides trompil, the quantity of trompil then reduces gradually, and such big or small hole distributes and can be with the more even of flue gas dispersion, cooperates subsequent strong and weak electric field, can collect the large granule dust high efficiently, and the flue gas velocity of flow is smooth and easy simultaneously, pressure stability, and dust collection efficiency is higher.
6. The utility model discloses handle sintering machine aircraft nose flue gas and dust classification handles organic combination and unify, form a complete system, the energy-concerving and environment-protective of technological process, the resource recovery rate is high, and ultralow emission, engineering economic benefits is splendid.
Drawings
FIG. 1 is a schematic structural diagram of a sintering machine head flue gas treatment device in the prior art;
FIG. 2 is a schematic structural view of the flue gas treatment device of the head of the sintering machine of the present invention;
FIG. 3 is a schematic structural diagram of the flue gas treatment device of the present invention including a sintering batching system and a valuable metal recovery device;
fig. 4 is a schematic structural diagram of the air flow distribution plate of the present invention.
Reference numerals:
1: a dust remover; 2: a desulfurization and denitrification device; 3: a fan; 4: an electrical region; 401: an electric field; 5: a transition zone; 501: a spraying device; 6: a pocket area; 601: a sub-pocket area; 602: a filter bag; 7: a bell mouth of the dust remover; 701: an air flow distribution plate; 702: opening a hole; 8: an additive bin; 9: an electric area ash bucket; 10: a bag area ash bucket; 11: an additive drag conveyor; 12: a detection and material distribution device; 13: a mixing device; 14: circulating the bin; 1501: a first crushing device; 1502: a second crushing device; 1503: a third crushing device; 16: a sintered ash scraper conveyor; 17: sintering the dust bin; 18: a dissolving and washing device; 19: a filtration device; 20: a drying device; 21: a sintering batching system; 22: a purifying and impurity removing device; 23: an extraction device; 24: a valuable metal recovery device; 25: a double-layer ash discharge valve; 26: a vibrating device; 27: a heating device; 2801: a loading level indicator; 2802: a level meter; 29: a temperature detection device;
l1: an air duct; l2: a nitrogen gas delivery pipe; l3: an additive delivery conduit; l4: the additive supplements the pipeline.
Detailed Description
The technical solution of the present invention is illustrated below, and the claimed invention includes but is not limited to the following embodiments.
According to the utility model discloses a first embodiment provides a sintering machine aircraft nose flue gas processing apparatus.
A sintering machine head flue gas treatment device comprises a dust remover 1 and a desulfurization and denitrification device 2. The flue gas outlet of the dust remover 1 is connected to the desulfurization and denitrification device 2 through an air pipe L1. The air pipe L1 is provided with a fan 3. According to the trend of the flue gas, an electric area 4, a transition area 5 and a bag area 6 are sequentially arranged in the dust remover 1. Dust collector ash hoppers are arranged below the electric area 4 and the bag area 6.
The utility model discloses in, dust remover 1 is still including setting up dust remover horn mouth 7 in the flue gas entrance. The large opening end of the dust collector bell mouth 7 is connected with the electric area 4. Preferably, an air flow distribution plate 701 is arranged in the dust remover bell mouth 7. Preferably, the number of the gas flow distribution plates 701 is plural. According to the trend of the flue gas, the sizes of the air flow distribution plates 701 are sequentially increased along with the widening of the bell mouth 7 of the dust remover.
Preferably, the air distribution plate 701 is provided with a plurality of rows of openings 702 along the height direction of the dust collector 1. In the direction from the middle to the upper and lower sides of the airflow distribution plate 701, the diameters of the rows of openings 702 are sequentially increased, and the number of the rows of openings 702 is sequentially decreased.
The utility model discloses in, be equipped with sprinkler 501 in the transition zone 5. The spraying devices 501 are arranged at the top and bottom in the transition zone 5, with the nozzles of the spraying devices 501 facing towards the centre of the transition zone 5.
Preferably, the device also comprises an additive bin 8 and a nitrogen delivery line L2. The additive bin 8 is connected with the spraying device 501 through an additive conveying pipeline L3. The nitrogen delivery line L2 is also connected to the spraying device 501.
In the present invention, m electric fields 401 are provided in the electric field 4. The strength of each electric field 401 increases in sequence according to the smoke trend. An electric area ash bucket 9 is arranged below each electric field 401. Wherein m is 1 to 8, preferably 2 to 4.
In the present invention, n sub-pocket regions 601 are provided in the pocket region 6. A filter bag 602 is disposed between adjacent sub-bag regions 601. The filter bag 602 is provided with uniformly distributed meshes. According to the smoke trend, the diameter of the meshes on each filter bag 602 is increased in sequence. Wherein n is 1 to 8, preferably 2 to 4. A bag-section ash hopper 10 is arranged below each sub-bag section 601.
The utility model discloses in, the device still includes additive scraper conveyor 11, detection and feed divider 12, the mixing arrangement 13 that sets up in pocket area ash bucket 10 low reaches. Wherein, the additive scraper conveyer 11 is arranged below the discharge hole of the bag area ash bucket 10. The discharge end of the additive scraper conveyor 11 is connected to the feed inlet of the detection and distribution device 12. The first discharge port of the detection and distribution device 12 is connected to the additive delivery line L3 via an additive replenishment line L4. The second discharge port of the detecting and distributing device 12 is connected to the feed port of the mixing device 13.
Preferably, the device also comprises a circulating bin 14 arranged between the additive scraper conveyor 11 and the detecting and distributing device 12, and a first crushing device 1501. Wherein the discharge end of the additive scraper conveyor 11 is connected to the feed inlet of the circulation bin 14. The discharge opening of the circulation tank 14 is connected to the feed opening of the first crushing device 1501. The discharge port of the first crushing device 1501 is connected to the feed port of the detecting and distributing device 12.
The utility model discloses in, the discharge gate below of electric zone ash bucket 9 is equipped with sintering ash scraper conveyor 16. The discharge end of the sintered ash scraper conveyor 16 is connected with the feed inlet of the mixing device 13.
Preferably, the device also comprises a sintering dust bin 17 and a second crushing device 1502 which are arranged between the sintering dust scraper conveyor 16 and the mixing device 13. Wherein, the discharge end of the sintering dust scraper conveyor 16 is connected to the feed inlet of the sintering dust bin 17. The discharge port of the sintered dust bin 17 is connected to the feed port of the second crushing device 1502. The outlet of the second comminution device 1502 is connected to the inlet of the mixing device 13.
The utility model discloses in, the device still includes dissolving washing device 18, filter equipment 19, drying device 20, third breaker 1503, sintering feed proportioning system 21. The discharge port of the mixing device 13 is connected to the feed port of the dissolving and washing device 18. The discharge port of the elution device 18 is connected to the feed port of the filtration device 19. The solids outlet of the filter device 19 is connected to the inlet of the drying device 20. The discharge port of the drying device 20 is connected to the feed port of the third crushing device 1503. The discharge of the third crushing device 1503 is connected to the sinter batching system 21.
Preferably, the apparatus further comprises a purification and impurity removal device 22, an extraction device 23, and a valuable metal recovery device 24. Wherein the liquid outlet of the filtering device 19 is connected to the inlet of the purification and impurity removal device 22. The outlet of the purification and impurity removal device 22 is connected to the inlet of the extraction device 23. The outlet of the extraction device 23 is connected to a valuable metal recovery device 24. Preferably, the liquid outlet of the filtering device 19 is connected with the liquid inlet of the dissolving and washing device 18.
The utility model discloses in, the discharge gate below of electricity district ash bucket 9 and bag district ash bucket 10 all is equipped with double-deck unloading valve 25. The discharge ports of the electric area ash bucket 9 and the bag area ash bucket 10 are respectively provided with a vibration device 26. Preferably, a heating device 27 is also arranged in the electric area ash bucket 9 and the bag area ash bucket 10.
Preferably, the electric ash bucket 9 and the bag ash bucket 10 are provided with a level meter 2801 on the upper part of the side wall and a level meter 2802 on the lower part of the side wall. Preferably, the side walls of the electric area ash bucket 9 and the bag area ash bucket 10 are also provided with a temperature detection device 29.
Example 1
As shown in FIG. 2, the flue gas treatment device for the head of the sintering machine comprises a dust remover 1 and a desulfurization and denitrification device 2. The flue gas outlet of the dust remover 1 is connected to the desulfurization and denitrification device 2 through an air pipe L1. The air pipe L1 is provided with a fan 3. According to the trend of the flue gas, an electric area 4, a transition area 5 and a bag area 6 are sequentially arranged in the dust remover 1. Dust collector ash hoppers are arranged below the electric area 4 and the bag area 6. Wherein the height of the dust separator 1 is 40m.
Example 2
Example 1 was repeated except that the precipitator 1 further included a precipitator bell 7 arranged at the flue gas inlet. The large opening end of the dust collector bell mouth 7 is connected with the electric area 4. A plurality of airflow distribution plates 701 are arranged in the dust remover bell mouth 7. According to the trend of the flue gas, the sizes of the air flow distribution plates 701 are sequentially increased along with the widening of the bell mouth 7 of the dust remover.
Example 3
As shown in fig. 4, embodiment 2 is repeated except that a plurality of rows of openings 702 are provided in the air distribution plate 701 in the height direction of the dust collector 1. In the direction from the middle to the upper and lower sides of the airflow distribution plate 701, the diameters of the rows of openings 702 increase in sequence, and the number of the rows of openings 702 decreases in sequence.
Example 4
Example 3 was repeated except that a spray device 501 was provided in the transition zone 5. The spraying devices 501 are arranged at the top and bottom in the transition zone 5, with the nozzles of the spraying devices 501 facing towards the centre of the transition zone 5.
Example 5
Example 4 was repeated except that the apparatus further included an additive silo 8 and a nitrogen delivery line L2. The additive bin 8 is connected with the spraying device 501 through an additive conveying pipeline L3. The nitrogen delivery line L2 is also connected to the spraying device 501.
Example 6
Example 5 was repeated except that 3 electric fields 401 were provided in the electric field 4. According to the smoke trend, a first electric field, a second electric field and a third electric field are arranged in sequence. The intensity of each electric field 401 is sequentially increased, that is, the intensity of the first electric field is less than the intensity of the second electric field is less than the intensity of the third electric field. An electric area ash bucket 9 is arranged below each electric field 401.
Example 7
Example 6 was repeated except that 3 sub-pockets 601 were provided in the pocket 6. A filter bag 602 is disposed between adjacent sub-bag regions 601. The filter bag 602 is provided with uniformly distributed meshes. Namely, a first filter bag, a second filter bag and a third filter bag are sequentially arranged according to the smoke trend. Wherein the diameters of the meshes of the filter bags 602 are sequentially increased, i.e., the diameter of the mesh of the first filter bag is smaller than the diameter of the mesh of the second filter bag and smaller than the diameter of the mesh of the third filter bag. A bag-section ash hopper 10 is arranged below each sub-bag section 601.
Example 8
Example 7 is repeated, as shown in fig. 3, except that the apparatus further comprises an additive scraper conveyor 11, a detection and distribution device 12, and a mixing device 13, which are arranged downstream of the pocket-area ash hopper 10. Wherein, the additive scraper conveyer 11 is arranged below the discharge hole of the bag area ash hopper 10. The discharge end of the additive scraper conveyor 11 is connected to the feed inlet of the detection and distribution device 12. The first discharge port of the detection and distribution device 12 is connected to the additive delivery line L3 via an additive replenishment line L4. The second discharge port of the detecting and distributing device 12 is connected to the feed port of the mixing device 13.
Example 9
Example 8 is repeated except that the apparatus further comprises an endless bin 14, a first crushing device 1501, arranged between the additive scraper conveyor 11 and the detecting and distributing device 12. Wherein the discharge end of the additive scraper conveyor 11 is connected to the feed inlet of the circulation bin 14. The discharge opening of the circulation tank 14 is connected to the feed opening of the first crushing device 1501. The discharge opening of the first crushing device 1501 is connected to the feed opening of the detecting and distributing device 12.
Example 10
Example 9 was repeated except that below the discharge port of the electric zone ash hopper 9 was a sintered ash scraper conveyor 16. The discharge end of the sintered ash scraper conveyor 16 is connected with the feed inlet of the mixing device 13.
Example 11
Example 10 was repeated except that the apparatus further included a dust bin 17 for sintered powder, a second crushing apparatus 1502, which was disposed between the scraper conveyor 16 for sintered powder and the mixing apparatus 13. Wherein, the discharge end of the sintering dust scraper conveyor 16 is connected to the feed inlet of the sintering dust bin 17. The discharge port of the sintered dust bin 17 is connected to the feed port of the second crushing device 1502. The outlet of the second comminution device 1502 is connected to the inlet of the mixing device 13.
Example 12
Example 11 was repeated except that the apparatus further included a washing apparatus 18, a filtering apparatus 19, a drying apparatus 20, a third crushing apparatus 1503, and a sintering and batching system 21. The discharge port of the mixing device 13 is connected to the feed port of the dissolving and washing device 18. The discharge port of the elution device 18 is connected to the feed port of the filtration device 19. The solids outlet of the filter device 19 is connected to the inlet of the drying device 20. The discharge port of the drying device 20 is connected to the feed port of the third crushing device 1503. The discharge port of the third crushing device 1503 is connected to the sintering batching system 21.
Example 13
Example 12 was repeated except that the apparatus further included a purification and impurity removal apparatus 22, an extraction apparatus 23, and a valuable metal recovery apparatus 24. Wherein the liquid outlet of the filtering device 19 is connected to the inlet of the purification and impurity removal device 22. The outlet of the purification and impurity removal device 22 is connected to the inlet of the extraction device 23. The outlet of the extraction device 23 is connected to a valuable metal recovery device 24.
Example 14
Example 13 was repeated except that the liquid outlet of the filtration device 19 was connected to the liquid inlet of the elution device 18.
Example 15
Example 14 was repeated except that a double-layer dust discharge valve 25 was provided below the discharge ports of the electric area dust hopper 9 and the bag area dust hopper 10. The discharge ports of the electric area ash bucket 9 and the bag area ash bucket 10 are respectively provided with a vibration device 26.
Example 16
Example 15 is repeated except that heating means 27 are also provided in the electric area hopper 9 and the bag area hopper 10.
Example 17
Example 16 was repeated except that the upper portions of the side walls of the electric ash bucket 9 and the bag ash bucket 10 were each provided with a level indicator 2801 and the lower portions of the side walls were each provided with a level indicator 2802.
Example 18
Example 17 was repeated except that the side walls of the electric area hopper 9 and the bag area hopper 10 were further provided with temperature detecting means 29.

Claims (20)

1. A sintering machine head flue gas treatment device comprises a dust remover (1) and a desulfurization and denitrification device (2); a flue gas outlet of the dust remover (1) is connected to the desulfurization and denitrification device (2) through an air pipe (L1); a fan (3) is arranged on the air pipe (L1); the method is characterized in that: according to the trend of flue gas, an electric area (4), a transition area (5) and a bag area (6) are sequentially arranged in the dust remover (1); dust collector ash hoppers are arranged below the electric area (4) and the bag area (6); wherein the height of the dust remover (1) is 2-100m.
2. The flue gas treatment device for the head of the sintering machine according to claim 1, wherein: the dust remover (1) also comprises a dust remover bell mouth (7) arranged at the flue gas inlet; the large opening end of the dust remover bell mouth (7) is connected with the electric area (4).
3. The flue gas treatment device for the head of the sintering machine according to claim 2, wherein: an air flow distribution plate (701) is arranged in the horn mouth (7) of the dust remover.
4. The flue gas treatment device for the head of the sintering machine according to claim 3, wherein: the number of the airflow distribution plates (701) is multiple; according to the trend of the flue gas, the sizes of the air flow distribution plates (701) are sequentially increased along with the widening of the bell mouth (7) of the dust remover.
5. The flue gas treatment device for the head of the sintering machine according to claim 3, wherein: a plurality of rows of open holes (702) are arranged on the airflow distribution plate (701) along the height direction of the dust remover (1); wherein, along the direction from the middle of the air flow distribution plate (701) to the upper side and the lower side, the diameter of each row of the openings (702) is increased in sequence, and the number of each row of the openings (702) is decreased in sequence.
6. The flue gas treatment device for the head of the sintering machine according to claim 1, wherein: a spraying device (501) is arranged in the transition area (5); the spraying devices (501) are arranged at the top and the bottom in the transition area (5), and the nozzles of the spraying devices (501) face to the center of the transition area (5).
7. The flue gas treatment device for the nose of the sintering machine according to claim 6, wherein: the device also comprises an additive bin (8) and a nitrogen conveying pipeline (L2); the additive bin (8) is connected with a spraying device (501) through an additive conveying pipeline (L3); the nitrogen delivery line (L2) is also connected to the spraying device (501).
8. The sintering machine head flue gas treatment device according to any one of claims 1 to 7, characterized in that: m electric fields (401) are arranged in the electric region (4); the strength of each electric field (401) is sequentially enhanced according to the trend of the smoke; an electric area ash bucket (9) is arranged below each electric field (401); wherein m is 1 to 8; and/or
N sub-pocket areas (601) are arranged in the pocket area (6); a filter bag (602) is arranged between the adjacent sub-bag areas (601); the filter bag (602) is provided with meshes which are uniformly distributed; according to the smoke trend, the diameters of meshes on the filter bags (602) are sequentially increased; wherein n is 1 to 8; a bag area ash bucket (10) is arranged below each sub-bag area (601).
9. The flue gas treatment device for the head of the sintering machine according to claim 8, wherein: m is 2 to 4; n is 2 to 4.
10. The sintering machine head flue gas treatment device according to claim 8, characterized in that: the device also comprises an additive scraper conveyor (11), a detection and distribution device (12) and a mixing device (13), which are arranged at the downstream of the ash hopper (10) in the bag area; wherein the additive scraper conveyor (11) is arranged below a discharge hole of the bag area ash hopper (10); the discharge end of the additive scraper conveyor (11) is connected to the feed inlet of the detection and distribution device (12); a first discharge port of the detection and distribution device (12) is connected to an additive conveying pipeline (L3) through an additive supplement pipeline (L4); the second discharge hole of the detection and distribution device (12) is connected to the feed hole of the mixing device (13).
11. The flue gas treatment device for the head of the sintering machine according to claim 10, wherein: the device also comprises a circulating bin (14) and a first crushing device (1501), wherein the circulating bin (14) is arranged between the additive scraper conveyor (11) and the detecting and distributing device (12); wherein the discharge end of the additive scraper conveyor (11) is connected to the feed inlet of the circulating bin (14); the discharge hole of the circulating bin (14) is connected to the feed hole of the first crushing device (1501); the discharge hole of the first crushing device (1501) is connected to the feed hole of the detecting and distributing device (12).
12. The flue gas treatment device for the head of the sintering machine according to claim 11, wherein: a sintered ash scraper conveyor (16) is arranged below the discharge hole of the electric area ash hopper (9); the discharge end of the sintering ash scraper conveyor (16) is connected with the feed inlet of the mixing device (13).
13. The flue gas treatment device for the head of the sintering machine according to claim 12, wherein: the device also comprises a sintering dust bin (17) arranged between the sintering dust scraper conveyor (16) and the mixing device (13) and a second crushing device (1502); wherein the discharge end of the sintering dust scraper conveyor (16) is connected to the feed inlet of the sintering dust bin (17); a discharge hole of the sintering dust bin (17) is connected to a feed hole of the second crushing device (1502); the discharge opening of the second crushing device (1502) is connected to the feed opening of the mixing device (13).
14. The flue gas treatment device for the head of the sintering machine according to claim 13, wherein: the device also comprises a dissolving and washing device (18), a filtering device (19), a drying device (20), a third crushing device (1503) and a sintering and batching system (21); the discharge hole of the mixing device (13) is connected to the feed inlet of the dissolving and washing device (18); the discharge hole of the dissolving and washing device (18) is connected to the feed hole of the filtering device (19); the solid outlet of the filtering device (19) is connected to the feed inlet of the drying device (20); the discharge port of the drying device (20) is connected to the feed port of the third crushing device (1503); the discharge port of the third crushing device (1503) is connected to the sintering proportioning system (21).
15. The sintering machine head flue gas treatment device according to claim 14, characterized in that: the device also comprises a purification and impurity removal device (22), an extraction device (23) and a valuable metal recovery device (24); wherein, the liquid outlet of the filtering device (19) is connected to the inlet of the purification and impurity removal device (22); the outlet of the purification and impurity removal device (22) is connected to the inlet of the extraction device (23); the outlet of the extraction device (23) is connected to a valuable metal recovery device (24).
16. The sintering machine head flue gas treatment device according to claim 15, characterized in that: the liquid outlet of the filtering device (19) is connected with the liquid inlet of the dissolving and washing device (18).
17. The flue gas treatment device for the head of the sintering machine according to claim 8, wherein: double-layer ash discharge valves (25) are arranged below the discharge ports of the electric area ash hopper (9) and the bag area ash hopper (10); the discharge ports of the electric area ash bucket (9) and the bag area ash bucket (10) are respectively provided with a vibration device (26).
18. The flue gas treatment device for the head of the sintering machine according to claim 8, wherein: heating devices (27) are also arranged in the electric area ash bucket (9) and the bag area ash bucket (10).
19. The flue gas treatment device for the head of the sintering machine according to claim 8, wherein: the upper parts of the side walls of the electric area ash bucket (9) and the bag area ash bucket (10) are respectively provided with a loading level indicator (2801), and the lower parts of the side walls are respectively provided with a discharging level indicator (2802).
20. The flue gas treatment device for the head of the sintering machine according to claim 8, wherein: the side walls of the electric area ash bucket (9) and the bag area ash bucket (10) are also provided with temperature detection devices (29).
CN202221687038.7U 2022-07-01 2022-07-01 Sintering machine head flue gas treatment device Active CN217962948U (en)

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CN202221687038.7U CN217962948U (en) 2022-07-01 2022-07-01 Sintering machine head flue gas treatment device

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Application Number Priority Date Filing Date Title
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