CN109092556B - Device for separating iron powder in desulfurized fly ash by utilizing airflow - Google Patents
Device for separating iron powder in desulfurized fly ash by utilizing airflow Download PDFInfo
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- CN109092556B CN109092556B CN201810874380.XA CN201810874380A CN109092556B CN 109092556 B CN109092556 B CN 109092556B CN 201810874380 A CN201810874380 A CN 201810874380A CN 109092556 B CN109092556 B CN 109092556B
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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Abstract
The application discloses a device for separating iron powder in desulfurized fly ash by utilizing airflow, and belongs to the field of iron powder recovery equipment. The application comprises an air inlet pipe, an iron powder recovery cavity, a top cover and a back blowing air tank, wherein an electromagnet and a cotton sleeve are arranged in the iron powder recovery cavity, the cotton sleeve is wrapped outside the electromagnet, the electromagnet comprises a wire and an iron core, the surface of the iron core is provided with a vent hole, and the vent hole is communicated with the cylinder core of the iron core; the top cover is arranged at the top of the iron powder recovery cavity, and a filter layer is arranged in the top cover; the air inlet pipe is arranged at the bottom of the iron powder recovery cavity, and the desulfurized ash enters the iron powder recovery cavity through the air inlet pipe; the back-blowing gas tank is connected with the cylinder core of the iron core through a gas pipeline. According to the application, the air inlet pipe blows air into the iron powder recovery cavity, the air drives the desulfurization ash in the conveying pipe to move upwards to the iron powder recovery cavity, and the electromagnet adsorbs iron in the blown desulfurization ash after being electrified, so that the recovery efficiency of the iron powder in the desulfurization ash is improved.
Description
Technical Field
The application relates to the field of material separation, in particular to a device for separating iron powder in desulfurized fly ash by utilizing airflow.
Background
The sintering process is an important link in the modern steel production flow, and is also a main pollutant emission source in the steel industry, wherein the SO content in the steel industry is more than 70 percent 2 From the sintering process. With the country to SO 2 The enhancement of pollution control and the enhancement of environmental protection consciousness in China are more and more concerned about the research on the comprehensive utilization of sintering flue gas desulfurization ash, and more iron and steel plants begin to adopt flue gas desulfurization technology. Reduction of SO in sintering process 2 The emission of the waste gas becomes the key point of waste gas emission reduction in the steel industry, so that the existing steel enterprises are matched with desulfurization systems with different processes. However, since the properties of the desulfurization ash produced by flue gas desulfurization are greatly different from those of the ordinary fly ash, it is difficult to effectively utilize the desulfurization ash at present. If the desulfurization ash is fully utilized, the land area occupied by stacking can be reduced, and the aim of protecting the ecological environment is fulfilled. At present, the recycling of the desulfurization ash is mainly concentrated in the fields of building gypsum, cement retarder, cementing material, soil conditioner and the like. The desulphurized ash has relatively complex components and mainly contains C a SO 3 、CaSO 4 ·2H 2 O、CaCO 3 In addition, about 0.2% iron is contained. According to statistics, the desulfurization ash generated in the sintering flue gas desulfurization process in China exceeds 300 ten thousand t/year, and the iron content in the desulfurization ash reaches more than 6000 t. If the desulfurization ash can be subjected to the iron powder recovery step before treatment, the desulfurization ash has great significance for secondary utilization of resources and cost reduction and synergy of enterprises.
However, the prior art does not have a device for recovering iron powder in the desulfurized fly ash. Therefore, development of a set of online desulfurization gray iron powder recovery device is needed to develop a new way for high value-added utilization of desulfurization ash, and further promote efficient recycling application of desulfurization ash.
The application is characterized by comprising the following steps: a dry magnetic separator (patent application number: CN201420367815.9, bulletin day: 2014-12-10) is disclosed, the iron powder separator comprises a separation box, a feeding hopper positioned right below a tapping hole is arranged at the top of the separation box, a tapping movable door is hinged to the bottom of the separation box, an air inlet is arranged on one side of the box, a dust collection air pipe is connected to the other side of the box, and a control air valve is arranged on the dust collection air pipe, so that the ferromagnetic materials are thoroughly separated, the problem that the discharged ferromagnetic materials are mixed with material dust can be solved, and the technical problem that the ferromagnetic materials can be recovered on line is not solved. In addition, the application is named as follows: the magnetic separation powder recycling device (patent number application number: CN 201510345283.8, application date: 2015-06-19) comprises a steel slag powder and a conveying belt for conveying the steel slag powder, wherein the conveying belt sequentially bypasses a semi-magnetic roller, a bend pulley and a tail pulley, the bend pulley is arranged below the semi-magnetic roller, a bifurcation unloading groove and a magnetic separation powder unloading groove are arranged below the semi-magnetic roller, the magnetic separation powder unloading groove is arranged between the bifurcation unloading groove and the semi-magnetic roller, after the steel slag powder passes through the semi-magnetic roller, non-magnetic separation powder in the steel slag powder is recycled through the bifurcation unloading groove firstly, and the magnetic separation powder in the steel slag powder is recycled through the magnetic separation powder unloading groove through the magnetic attraction of the semi-magnetic roller, so that the problem of low recycling rate of the magnetic separation powder in the steel slag powder is effectively solved, and the pollution problem of steel slag in the recycling process is not solved yet.
Disclosure of Invention
1. Technical problem to be solved by the application
The application aims to overcome the defect that in the prior art, no special online desulfurization ash and iron powder recovery equipment is provided, so that the recovery efficiency of desulfurization ash is lower, and provides a device for separating iron powder in desulfurization ash by utilizing airflow, so that the recovery rate of iron powder in desulfurization ash can be improved; further, the pollution problem of the desulfurization ash in the recovery process can be solved.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the application is as follows:
the application relates to a device for separating iron powder in desulfurized fly ash by utilizing air flow, which comprises an air inlet pipe, an iron powder recovery cavity, a top cover and a back-blowing air tank; an electromagnet and a cotton sleeve are arranged in the iron powder recovery cavity, the cotton sleeve is wrapped outside the electromagnet, the electromagnet comprises a wire and an iron core, the wire is wound outside the iron core, a vent hole is formed in the surface of the iron core, and the vent hole is communicated with the cylinder core of the iron core; the top cover is arranged at the top of the iron powder recovery cavity, and a filter layer is arranged in the top cover; the air inlet pipe is arranged at the bottom of the iron powder recovery cavity, and the desulfurized ash enters the iron powder recovery cavity through the air inlet pipe; the back-blowing gas tank is connected with the cylinder core of the iron core through a gas pipeline.
Preferably, the electromagnet comprises a first electromagnet, a second electromagnet and a third electromagnet, wherein the first electromagnet and the second electromagnet are arranged in parallel, a gap is arranged between the first electromagnet and the second electromagnet, the third electromagnet is arranged on the upper parts of the first electromagnet and the second electromagnet, and the third electromagnet is arranged corresponding to the gap.
Preferably, the third electromagnet comprises a left electromagnet and a right electromagnet, and the joint of the left electromagnet and the right electromagnet is positioned right above the gap; the included angle at the joint of the left electromagnet and the right electromagnet is beta, and the value range of beta is 120-150 degrees.
Preferably, the back-blowing gas tank is connected with a main gas flow pipe, the main gas flow pipe is connected with a first gas flow branch pipe and a second gas flow branch pipe, and the first gas flow branch pipe is communicated with two ends of the iron core of the third electromagnet; the second airflow branch pipe is respectively communicated with iron cores of the first electromagnet and the second electromagnet.
Preferably, the first air flow branch pipe is provided with a first back-flushing valve, and the second air flow branch pipe is provided with a second back-flushing valve.
Preferably, the air inlet pipe comprises a first air inlet pipe and a second air inlet pipe, and the first air inlet pipe and the second air inlet pipe are correspondingly arranged.
Preferably, one side of the first air inlet pipe far away from the second air inlet pipe is provided with a desulfurization ash groove; the bottom of the desulfurization ash groove is connected with a first air inlet pipe through a conveying pipe; a desulfurization ash groove is arranged on one side of the second air inlet pipe away from the first air inlet pipe; the bottom of the desulfurization ash groove is connected with a first air inlet pipe through a conveying pipe.
Preferably, an air pipe connection part is arranged between the first air inlet pipe and the second air inlet pipe, and the air pipe connection part is correspondingly arranged with a gap between the first electromagnet and the second electromagnet.
Preferably, the desulfurization device further comprises a pressurized gas tank, wherein a sealing cover is arranged at the top of the desulfurization ash tank, and the pressurized gas tank is connected with the desulfurization ash tank through a pipeline.
Preferably, the bottom of the iron powder recycling cavity is provided with a cavity contraction section, and the air inlet pipe is connected with the bottom of the cavity contraction section.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the application has the following remarkable effects:
(1) According to the device for separating the iron powder in the desulfurized fly ash by utilizing the air flow, the electromagnet and the cotton sleeve are arranged in the iron powder recovery cavity, the cotton sleeve is wrapped outside the electromagnet, the friction force between the iron powder and the surface of the electromagnet is improved by the cotton sleeve, the iron powder adsorbed on the surface of the electromagnet is prevented from being blown off by the air, and the recovery of the iron powder is promoted; the electro-magnet includes wire, iron core, and wherein the wire twines in the outside of iron core, and the air vent has been seted up on the surface of iron core, and this air vent is linked together with the section of thick bamboo heart of iron core, and the blowback air current that the blowback air current of blowback air pitcher produced passes through the gas piping and moves to the section of thick bamboo heart of iron core, and the blowback air current can be followed the air vent and is retrieved the cavity department diffusion by cotton sheathed tube fibre hole to the iron powder, prevents that the desulfurization ash from permeating in cotton sheathed tube gap under the effect of jetting air current, and then reduces the purity of the iron powder of retrieving.
(2) According to the device for separating the iron powder in the desulfurized fly ash by utilizing the airflow, the top cover is arranged at the top of the iron powder recovery cavity, and the filter layer is arranged in the top cover; the air inlet pipe is arranged at the bottom of the iron powder recovery cavity, and the desulfurized ash enters the iron powder recovery cavity through the air inlet pipe; the blowing air flow blown by the air inlet pipe can be released to the outside of the iron powder recovery cavity through the filter layer, so that the smooth proceeding of the recovery process is ensured.
(3) The application relates to a device for separating iron powder in desulfurized fly ash by utilizing air flow, which comprises a first electromagnet, a second electromagnet and a third electromagnet, wherein the first electromagnet and the second electromagnet are arranged in parallel, a gap is arranged between the first electromagnet and the second electromagnet, the third electromagnet is arranged on the upper parts of the first electromagnet and the second electromagnet, and the third electromagnet is arranged corresponding to the gap; when the desulfurization ash is blown into and filled in the iron powder recovery cavity, the electromagnets are distributed up and down to ensure that the electromagnets at different positions and different levels can be fully contacted with the desulfurization ash, thereby ensuring the adsorption capacity of the electromagnets on different positions in the iron powder recovery cavity and further improving the recovery efficiency in unit time.
(4) The application relates to a device for separating iron powder in desulfurized fly ash by utilizing air flow, wherein a third electromagnet comprises a left electromagnet and a right electromagnet, and the joint of the left electromagnet and the right electromagnet is positioned right above a gap; the included angle at the joint of the left electromagnet and the right electromagnet is beta, and the value range of beta is 120-150 degrees; the middle part of third electro-magnet is provided with contained angle beta, can increase the surface area of third electro-magnet, and the desulfurization ash passes the space motion to junction under the effect of gas pressure, and the electromagnetic effort of junction is strengthened, and then promotes the absorption to the iron powder in the desulfurization ash, and the junction provides bigger surface area simultaneously, is favorable to improving the separation effect of iron powder in the desulfurization ash.
(5) According to the device for separating iron powder in the desulfurized fly ash by utilizing the air flow, the back-blowing air tank is connected with the air flow main pipe, the air flow main pipe is connected with the first air flow branch pipe and the second air flow branch pipe, and the first air flow branch pipe is communicated with the two ends of the iron core of the third electromagnet; the second airflow branch pipe is respectively communicated with iron cores of the first electromagnet and the second electromagnet; the ports of the second airflow branch pipes are arranged in a plurality, wherein the left ports are connected with the left end of the iron core of the first electromagnet, the right ports are connected with the right end of the iron core of the second electromagnet, the first airflow branch pipes are provided with first back-blowing valves, and the second airflow branch pipes are provided with second back-blowing valves; therefore, the gas flow in the first gas flow branch pipe and the gas flow in the second gas flow branch pipe can be respectively regulated, and the flow speed of the back blowing gas flow in the vent hole is controlled, so that the influence of overlarge gas flow on the adsorption of iron powder is avoided;
(6) The application relates to a device for separating iron powder in desulfurized fly ash by utilizing air flow, wherein an air inlet pipe comprises a first air inlet pipe and a second air inlet pipe, and the first air inlet pipe and the second air inlet pipe are correspondingly arranged; an air pipe connecting part is arranged between the first air inlet pipe and the second air inlet pipe, the air pipe connecting part is correspondingly arranged with a gap between the first electromagnet and the second electromagnet, the air inlet pipe is connected with the bottom of the cavity shrinkage section, the air flows generated by the air inlet pipe move upwards along the directions of the first air inlet pipe and the second air inlet pipe respectively, wind force finally gathers at the air pipe connecting part and enters the cavity shrinkage section, and the bottom shrinkage design of the cavity shrinkage section enables wind force to gather upwards, so that the desulfurization ash is prevented from being deposited at the bottom due to uneven stress.
(7) According to the device for separating iron powder in the desulfurized fly ash by utilizing the air flow, one side of the first air inlet pipe, which is far away from the second air inlet pipe, is provided with the desulfurized fly ash tank; the bottom of the desulfurization ash groove is connected with a first air inlet pipe through a conveying pipe; a desulfurization ash groove is arranged on one side of the second air inlet pipe away from the first air inlet pipe; the bottom of the desulfurization ash groove is connected with a first air inlet pipe through a conveying pipe; the top of the desulfurization ash groove is provided with a sealing cover, and the pressurizing air tank is connected with the desulfurization ash groove through a pipeline, so that desulfurization ash can be directly added into the air inlet pipe, and the online recycling of desulfurization ash and iron powder is realized.
Drawings
FIG. 1 is a schematic structural view showing an apparatus for separating iron powder from desulfurized fly ash by utilizing a gas stream in accordance with embodiment 1;
FIG. 2 is a schematic top view of the top cover of example 1;
FIG. 3 is a schematic structural view showing an apparatus for separating iron powder from desulfurized fly ash by utilizing a gas stream in accordance with embodiment 3;
fig. 4 is a schematic structural view of embodiment 4;
fig. 5 is a flow chart of a method of separating iron powder from desulfurized fly ash.
Reference numerals in the schematic drawings illustrate:
100. an air inlet pipe; 110. a first air inlet pipe; 120. a second air inlet pipe; 130. the air pipe connection part; 131. a bellows; 140. A recovery tank; 150. a blower fan; 101. a desulfurization ash tank; 102. a delivery tube; 103. a pressurized gas tank; 104. a material valve;
200. an iron powder recovery cavity; 201. a power-on head; 202. a wire; 203. a cotton sleeve; 204. a vent hole; 205. an iron core; 210. a first electromagnet; 220. a second electromagnet; 230. a third electromagnet; 231. a left electromagnet; 232. a right electromagnet; 240. a cavity constriction section;
310. a top cover; 320. a filter layer;
410. a blowback gas tank; 420. an air flow main pipe; 421. a first airflow branch; 422. a second airflow branch pipe; 423. a first blowback valve; 424. and a second blowback valve.
Detailed Description
The following detailed description and example embodiments of the application may be better understood when read in conjunction with the accompanying drawings, in which elements and features of the application are identified by reference numerals.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the application, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the application, without affecting the effect or achievement of the objective. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and the like are also used in the present specification for convenience of description, and are not intended to limit the scope of the present application, but the changes or modifications of the relative relationship thereof are also regarded as the scope of the present application which can be implemented without substantial modification to the technical content; in addition, the embodiments of the present application are not independent of each other, but may be combined.
Example 1
As shown in fig. 1, the apparatus for separating iron powder from desulfurized fly ash by using air current of the present application comprises an air inlet pipe 100, an iron powder recovery chamber 200, a top cover 310 and a back-blowing air tank 410; the electromagnet and the cotton sleeve 203 are arranged in the iron powder recovery cavity 200, the cotton sleeve 203 wraps the electromagnet, the cotton sleeve 203 improves the friction force between the surface of the electromagnet and the iron powder, and the iron powder adsorbed on the surface of the electromagnet is prevented from being blown off by the blowing air flow; the electromagnet comprises a wire 202 and an iron core 205, wherein the wire 202 is wound outside the iron core 205, a vent hole 204 is formed in the surface of the iron core 205, the vent hole 204 is communicated with the cylinder core of the iron core 205, and then the blowback gas tank 410 can convey blowback gas flow to the cylinder core of the iron core 205 through a gas pipeline; in addition, the diameter of the vent hole 204 is larger than that of the lead 202, so that when the lead 202 passes through the outer surface of the vent hole 204, the back-blowing air flow entering the iron core 205 can also flow out from gaps around the vent hole 204 and then spread outwards through the cotton sleeve 203, and the back-blowing air flow which is spread outwards can prevent the desulfurization ash from entering the cotton sleeve 203 under the action of the blowing air flow.
The top cover 310 of the present embodiment is disposed at the top of the iron powder recycling cavity 200, and a filter layer 320 is disposed inside the top cover 310; the air inlet pipe 100 is arranged at the bottom of the iron powder recovery cavity 200, and the blowing air flow in the air inlet pipe 100 is used for blowing the desulfurization ash into the iron powder recovery cavity 200, so that the desulfurization ash enters the iron powder recovery cavity 200 through the air inlet pipe 100; the air-blowing flow generated by the air inlet pipe 100 flows out of the iron powder recovery cavity 200 through the filter layer 320, balances the pressure intensity of the iron powder recovery cavity 200 and the outside, and ensures the smooth proceeding of the recovery process.
It should be noted that the electromagnets include a first electromagnet 210, a second electromagnet 220 and a third electromagnet 230, wherein the first electromagnet 210 and the second electromagnet 220 are arranged in parallel, a gap is disposed between the first electromagnet 210 and the second electromagnet 220, the third electromagnet 230 is disposed on the upper portions of the first electromagnet 210 and the second electromagnet 220, and the third electromagnet 230 is disposed corresponding to the gap. The up-down arrangement mode of the electromagnets enables the electromagnets at different positions and different levels to be fully contacted with the desulfurization ash, so that the electromagnets absorb and recover the iron powder at different positions in the cavity 200, and further the recovery efficiency of the iron powder in unit time is improved.
The third electromagnet 230 of the present embodiment includes a left electromagnet 231 and a right electromagnet 232, and the connection between the left electromagnet 231 and the right electromagnet 232 is located right above the gap; the included angle at the connection position of the left electromagnet 231 and the right electromagnet 232 is beta, the value range of beta is 120-150 degrees, the preferred value of beta in the embodiment is 120 degrees, the arrangement of the included angle beta increases the adsorption area of the third electromagnet 230 to the iron powder, and simultaneously enhances the electromagnetic acting force at the connection position, so that stronger magnetic force is generated to adsorb the iron powder in the desulfurization ash.
As shown in fig. 1 and 2, the top cover 310 is disposed at the top of the iron powder recovery cavity 200, an internal thread is disposed inside the top of the iron powder recovery cavity 200, and an external thread matched with the internal thread is disposed on the outer side wall of the top cover 310, so that the iron powder recovery cavity 200 is connected with the top cover 310 by threads, and the installation efficiency can be improved by the way of threaded connection; in addition, a filter layer 320 is disposed inside the top cover 310, a through hole is disposed on the filter layer 320, the through hole is matched with the energizing head 201, the energizing head 201 is disposed on the filter layer 320 in a penetrating manner through the through hole, the energizing head 201 penetrates through the filter layer 320 to extend to the outside of the top cover 310, and the energizing head 201 is electrically connected with a power supply. The filtering layer 320 is a gauze or a filling layer with gaps or a dust removing cloth bag, gas can flow out through the filtering layer 320 in the iron powder recycling process, and the filtering layer 320 can limit the treated desulfurization ash in the iron powder recycling cavity 200, so that the treated desulfurization ash is concentrated in the iron powder recycling cavity 200, and the pollution to the environment is reduced while the iron powder in the desulfurization ash is safely and efficiently recycled.
According to the method for separating the iron powder in the desulfurized fly ash, the desulfurized fly ash is blown into the iron powder recovery cavity 200 by the blowing air flow of the air inlet pipe 100, the electromagnet generates magnetic force to adsorb the iron powder in the desulfurized fly ash on the surface of the cotton sleeve 203, and meanwhile, the back blowing air flow of the back blowing air tank 410 overflows outwards through the vent hole 204 on the surface of the iron core 205 of the electromagnet. As shown in fig. 5, the detailed steps of the method are as follows:
step 1: opening the electromagnet, simultaneously opening an air valve of the back-blowing air tank 410, enabling back-blowing air flow in the back-blowing air tank 410 to enter the cylinder core of the electromagnet core 205 through the pipeline, and enabling back-blowing air flow to overflow to the outside of the electromagnet through the vent hole 204 on the surface of the electromagnet core 205; the back-blowing air flow in the back-blowing air tank 410 respectively enters the first air flow branch pipe 421 and the second air flow branch pipe 422 through the main air flow pipe 420, and simultaneously controls the flow rates of the first back-blowing valve 423 and the second back-blowing valve 424
Step 2: starting the air blower 150, and spraying air generated by the air blower 150 into the iron powder recovery cavity 200 from bottom to top through the air inlet pipe 100;
step 3: delivering the desulfurization ash into the air inlet pipe 100 through the desulfurization ash tank 101; adding the desulfurized ash into the desulfurized ash tank 101, opening an air valve of a pressurizing air tank 103, pressurizing the desulfurized ash tank 101 by the pressurizing air tank 103, opening a material valve 104, and conveying the desulfurized ash in the desulfurized ash tank 101 into the air inlet pipe 100 through a conveying pipe 102;
step 4: the blowing air flow of the air inlet pipe 100 blows the desulfurized ash into the iron powder recovery cavity 200, the iron powder in the desulfurized ash is adsorbed on the surface of the cotton sleeve 203, the blowing air flow of the air inlet pipe 100 blows the desulfurized ash into the iron powder recovery cavity 200, the desulfurized ash is blown to the periphery of the electromagnet under the action of the blowing air flow, the iron powder in the desulfurized ash is adsorbed on the surface of the cotton sleeve 203 by the electromagnet, and meanwhile, the back blowing air flow overflows outwards through the vent holes 204 on the surface of the electromagnet iron core 205, so that the desulfurized ash is prevented from penetrating into the cotton sleeve 203; when the desulfurized fly ash moves to the lower part of the iron powder recovery cavity 200, the desulfurized fly ash moves to the periphery of the first electromagnet 210 and the second electromagnet 220, and the iron powder in the desulfurized fly ash is adsorbed on the surface of the cotton sleeve 203 by the first electromagnet 210 and the second electromagnet 220; then the desulfurization ash continues to move upwards under the action of the blowing air flow and moves to the desulfurization ash around the third electromagnet 230, and the iron powder in the desulfurization ash is adsorbed on the surface of the third electromagnet 230; the desulfurization ash moves to the junction between the left electromagnet 231 and the right electromagnet 232 through the gap between the first electromagnet 210 and the second electromagnet 220 under the action of the blowing air flow, and is adsorbed on the surface of the junction.
Example 2
The basic content of this embodiment is the same as embodiment 1, except that: the blowback gas tank 410 is connected with a main airflow pipe 420, the main airflow pipe 420 is connected with a first airflow branch pipe 421 and a second airflow branch pipe 422, the first airflow branch pipe 421 is communicated with two ends of the iron core 205 of the third electromagnet 230, and it is noted that: the first airflow branch pipe 421 is communicated with the cylinder core of the iron core 205, the cylinder core is an air channel, the cylinder core is communicated with the vent hole 204 on the surface of the iron core 205, and a sealing ring is arranged at the connection position of the first airflow branch pipe 421 and the cylinder core, so that the leakage of back-blowing airflow from the two ends of the cylinder core of the iron core 205 is avoided; the second airflow branch pipe 422 is respectively communicated with the iron cores 205 of the first electromagnet 210 and the second electromagnet 220, namely, the second airflow branch pipe 422 is communicated with a cylinder core in the iron cores 205, and a sealing ring is arranged at the connecting position of the second airflow branch pipe 422 and the cylinder core. The air inlet of the second air flow branch 422 includes a left port connected to the left end of the core 205 of the first electromagnet 210 and a right port connected to the right end of the core 205 of the second electromagnet 220. The air flow generated by the blowback air tank 410 enters the first air flow branch pipe 421 and the second air flow branch pipe 422 through the air pipes, respectively; the first air flow branch pipe 421 is provided with a first back-flushing valve 423, and the second air flow branch pipe 422 is provided with a second back-flushing valve 424; the first blowback valve 423 is used to control the flow rate of the gas in the first gas flow branch 421, and the second blowback valve 424 is used to control the flow rate of the gas in the second gas flow branch 422. The positions of the first electromagnet 210 and the second electromagnet 220 are close to the air inlet pipe 100, the power supply supplies electric energy to the electromagnets through the power-on head 201, and the electromagnets generate magnetic force through electromagnetic induction, so that on one hand, the number of turns of the lead 202 on the first electromagnet 210 and the second electromagnet 220 can be properly increased because the probability that the first electromagnet 210 and the second electromagnet 220 are contacted with iron powder in the desulfurized fly ash is high, and further the electromagnetic strength of the first electromagnet 210 and the second electromagnet 220 can be enhanced; on the other hand, compared with the first electromagnet 210 and the second electromagnet 220, the third electromagnet 230 is located far from the air inlet pipe 100, so that the probability of contact between the third electromagnet 230 and the iron powder in the desulfurized fly ash is low, the number of turns of the conducting wire 202 on the third electromagnet 230 needs to be properly increased under the condition of the same current, and the electromagnetic strength of the third electromagnet 230 is enhanced, so that the adsorption of the third electromagnet 230 to the iron powder blown into the top end of the iron powder recovery cavity 200 is improved, and further, the iron powder adsorbed on the surface of the cotton sleeve 203 can be prevented from being blown down by the back-blowing air flow.
It should be noted that, the desulfurized fly ash permeates into the cotton sleeve 203 under the action of the air flow blown by the air inlet pipe 100, so that the desulfurized fly ash remains in the cotton sleeve 203, resulting in lower purity of the recovered iron powder, and at this time, the air flow in the second air flow branch pipe 422 can be controlled by adjusting the second blowback valve 424, so that the blowback air flows from the inner surface to the outer surface of the cotton sleeve 203, and the desulfurized fly ash is prevented from remaining in the fiber holes of the cotton sleeve 203. The iron powder in the desulfurized fly ash is adsorbed on the surface of the cotton sleeve 203 under the action of electromagnetic force, and the desulfurized fly ash moving to the vicinity of the electromagnet moves reversely away from the cotton sleeve 203 under the action of the back-blowing air flow of the air hole 204, so that the separation of the desulfurized fly ash and the iron powder is promoted, and the recovery rate of the iron powder in the desulfurized fly ash is improved. The third electromagnet 230 is far away from the air inlet pipe 100, and when the desulfurized fly ash moves near the third electromagnet 230, the impact of the gas is smaller than that of the first electromagnet 210 and the second electromagnet 220, so in this embodiment, the flow rate of the gas in the first gas flow branch pipe 421 can be controlled by the first blowback valve 423, so that the flow rate of the gas in the first gas flow branch pipe 421 is smaller than that in the second gas flow branch pipe 422.
In addition, since the air-blowing flow in the air inlet pipe 100 has a certain air pressure, the desulfurization ash cannot enter the air inlet pipe 100 through the conveying pipe 102 by means of self gravity, so in the embodiment, a sealing cover is arranged at the top of the desulfurization ash tank 101, and the pressurized air tank 103 is connected with the desulfurization ash tank 101 through a pipeline; the pressurizing air tank 103 provides air pressure for the sealed desulfurization ash tank 101, so that air pressure in the air inlet pipe 100 is balanced, desulfurization ash is conveyed into the air inlet pipe 100 through the conveying pipe 102 under the action of the air pressure provided by the pressurizing air tank 103 and self gravity, the desulfurization ash is blown upwards into the iron powder recovery cavity 200 along the pipeline direction of the air inlet pipe 100 by the air blowing air in the air inlet pipe 100, and then iron powder in the desulfurization ash is recovered in the iron powder recovery cavity 200.
Example 3
The basic content of this embodiment is the same as embodiment 1, as shown in fig. 3, except that: the air inlet pipe 100 comprises a first air inlet pipe 110 and a second air inlet pipe 120, the first air inlet pipe 110 and the second air inlet pipe 120 are correspondingly arranged, an included angle between the first air inlet pipe 110 and the second air inlet pipe 120 is a, the range of a is 90-120 degrees, the first air inlet pipe 110 and the second air inlet pipe 120 can generate blowing air flow to blowing at the bottom of the iron powder recovery cavity 200, so that the desulfurized ash is better dispersed, the desulfurized ash is blown to the top from the bottom of the iron powder recovery cavity 200 under the action of the blowing air flow, the desulfurized ash is prevented from falling down under the action of self gravity and accumulating at the bottom of the iron powder recovery cavity 200, further the full contact of the desulfurized ash containing iron with the electromagnet is promoted, and the adsorption efficiency of the electromagnet to the iron powder is improved.
A desulfurization ash tank 101 is arranged at one side of the first air inlet pipe 110 far away from the second air inlet pipe 120; the bottom of the desulfurization ash tank 101 is connected with a first air inlet pipe 110 through a conveying pipe 102; a desulfurization ash tank 101 is arranged at one side of the second air inlet pipe 120 far away from the first air inlet pipe 110; the bottom of the desulfurization ash tank 101 is connected with a first air inlet pipe 110 through a conveying pipe 102; the desulfurization ash in the desulfurization ash tank 101 is respectively added into the first air inlet pipe 110 and the second air inlet pipe 120 through the conveying pipe 102, so that the desulfurization ash is conveniently and directly added into the air inlet pipe 100 along the conveying pipe 102, the online recycling of iron powder in the desulfurization ash is realized, and the actual production efficiency is improved. The blast pipe 100 is provided with a blast fan 150 at one end thereof remote from the fine iron recycling cavity 200, and the blast fan 150 is used for blowing air into the blast pipe 100. Since the air flow in the air inlet pipe 100 has a certain air pressure, and when the air pressure is large, the desulfurization ash cannot enter the air inlet pipe 100 by the gravity of the air inlet pipe, so in this embodiment, a sealing cover is arranged at the top of the desulfurization ash tank 101, and the pressurization air tank 103 is connected with the desulfurization ash tank 101 through a pipeline. The pressurizing air tank 103 provides air pressure for the sealed desulfurization ash tank 101, so that air pressure in the air inlet pipe 100 is balanced, desulfurization ash is conveyed into the air inlet pipe 100 through the conveying pipe 102 under the action of the air pressure provided by the pressurizing air tank 103 and self gravity, and the continuously blown air flow in the air inlet pipe 100 blows the desulfurization ash upwards into the iron powder recovery cavity 200 along the pipeline direction of the air inlet pipe 100, and iron powder in the desulfurization ash is recovered in the iron powder recovery cavity 200.
The bottom of the iron powder recovery cavity 200 is provided with a cavity contraction section 240, and the air inlet pipe 100 is connected with the bottom of the cavity contraction section 240; the air inlet pipe 100 is connected with the bottom of the iron powder recovery cavity 200 through the cavity contraction section 240, so that the blowing air flow blown by the air inlet pipe 100 is relatively gathered in the cavity contraction section 240, and the desulfurized ash is blown to the top from the bottom of the iron powder recovery cavity 200 under the action of the blowing air flow, so that the desulfurized ash is prevented from falling down under the action of self gravity and being deposited at the bottom of the iron powder recovery cavity 200. The conveying pipe 102 is provided with a material valve 104, and the material valve 104 can be opened or closed according to the requirement; the bottom side walls of the first and second air inlet pipes 110 and 120 are connected to the blower fan 150 through a pipe provided with a blower valve for controlling the flow rate of gas of the pipe; a recovery tank 140 is provided right under the bottoms of the first and second air inlet pipes 110 and 120, and the recovery tank 140 is used for recovering the treated desulfurization ash.
An air pipe connection 130 is disposed between the first air inlet pipe 110 and the second air inlet pipe 120 in this embodiment, the air pipe connection 130 is disposed corresponding to a gap between the first electromagnet 210 and the second electromagnet 220, the air pipe connection 130 extends into the cavity contraction section 240, and the air pipe connection 130 is higher than the bottom of the cavity contraction section 240. The air-jet flow generated by the air inlet pipe 100 moves upwards along the directions of the first air inlet pipe 110 and the second air inlet pipe 120 respectively, the air-jet flow is collected at the air pipe connection 130 and enters the cavity contraction section 240, the bottom contraction design of the cavity contraction section 240 enables the air-jet flow to gather and move upwards, and the deposition of desulfurization ash at the bottom of the cavity contraction section 240 due to uneven stress is avoided.
Example 4
The basic content of this embodiment is the same as that of embodiment 3, as shown in fig. 4, except that: the upper end of the cavity contraction section 240 is connected with the bottom of the iron powder recovery cavity 200 through the corrugated pipe 131, the lower end of the cavity contraction section 240 is connected with the top of the air inlet pipe 100 through the corrugated pipe 131, a vibration mechanism is arranged on the cavity contraction section 240 and is used for driving the cavity contraction section 240 to vibrate, and the desulfurized fly ash accumulated on the cavity contraction section 240 falls to the recovery tank 140 through the first air inlet pipe 110 and the second air inlet pipe 120 through vibration.
The specific use procedure for examples 1-4 is: firstly, the electromagnet is started, then the blower fan 150 of the air inlet pipe 100 is started, blowing air flows are blown into the air inlet pipe 100, and a first back-blowing valve 423 arranged on a first air flow branch pipe 421 and a second back-blowing valve 424 arranged on a second air flow branch pipe 422 are respectively opened, and the air flow is regulated. The desulfurization ash is added into the iron powder recovery cavity 200 from the desulfurization ash tank 101 through the conveying pipe 102, the desulfurization ash is conveyed into the iron powder recovery cavity 200 under the action of the blowing air flow in the air inlet pipe 100, so that the iron powder in the desulfurization ash is fully contacted with the electromagnet in the iron powder recovery cavity 200, the iron powder is adsorbed by the electromagnet, meanwhile, the back blowing air flow generated by the back blowing air tank 410 is introduced into the cylinder core of the iron core 205 through the air pipeline, then the back blowing air flow flows out from the vent hole 204, the desulfurization ash moving to the vicinity of the electromagnet is far away from the cotton sleeve 203 under the action of the back blowing air flow of the vent hole 204, the air can overflow through the filter layer 320 in the iron powder recovery process, and the desulfurization ash is limited in the iron powder recovery cavity 200 by the filter layer 320; after the collection of the iron powder is completed, the material valve 104 is closed, and then the blower fan 150 is closed, so that no air flow exists in the air inlet pipe 100, and the treated desulfurization ash sinks into the recovery tank 140 under the action of gravity.
The application has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will be understood that various modifications and changes may be made without departing from the scope of the application as defined by the appended claims. The detailed description and drawings are to be regarded in an illustrative rather than a restrictive sense, and if any such modifications and variations are desired to be included within the scope of the application described herein. Furthermore, the background art is intended to illustrate the state of the art and the meaning of the development and is not intended to limit the application or the field of application of the application.
Claims (6)
1. The device for separating iron powder in the desulfurized fly ash by utilizing air flow is characterized in that: comprises an air inlet pipe (100), an iron powder recovery cavity (200), a top cover (310) and a back blowing gas tank (410); an electromagnet and a cotton sleeve (203) are arranged in the iron powder recovery cavity (200), the cotton sleeve (203) is wrapped outside the electromagnet, the electromagnet comprises a wire (202) and an iron core (205), the wire (202) is wound outside the iron core (205), a vent hole (204) is formed in the surface of the iron core (205), and the vent hole (204) is communicated with the cylinder core of the iron core (205); the top cover (310) is arranged at the top of the iron powder recovery cavity (200), and a filter layer (320) is arranged in the top cover (310); the air inlet pipe (100) is arranged at the bottom of the iron powder recovery cavity (200), and the desulfurization ash enters the iron powder recovery cavity (200) through the air inlet pipe (100); the back-blowing gas tank (410) is connected with the cylinder core of the iron core (205) through a gas pipeline;
the electromagnets comprise a first electromagnet (210), a second electromagnet (220) and a third electromagnet (230), wherein the first electromagnet (210) and the second electromagnet (220) are arranged in parallel, a gap is arranged between the first electromagnet (210) and the second electromagnet (220), the third electromagnet (230) is arranged on the upper parts of the first electromagnet (210) and the second electromagnet (220), and the third electromagnet (230) is arranged corresponding to the gap;
the third electromagnet (230) comprises a left electromagnet (231) and a right electromagnet (232), and the joint of the left electromagnet (231) and the right electromagnet (232) is positioned right above the gap; the included angle at the joint of the left electromagnet (231) and the right electromagnet (232) is beta, and the value range of beta is 120-150 degrees;
the back-blowing gas tank (410) is connected with a main gas flow pipe (420), the main gas flow pipe (420) is connected with a first gas flow branch pipe (421) and a second gas flow branch pipe (422), and the first gas flow branch pipe (421) is communicated with two ends of the iron core (205) of the third electromagnet (230); the second airflow branch pipe (422) is respectively communicated with the iron cores (205) of the first electromagnet (210) and the second electromagnet (220); the first air flow branch pipe (421) is provided with a first back-flushing valve (423), and the second air flow branch pipe (422) is provided with a second back-flushing valve (424).
2. The apparatus for separating iron powder from desulfurized fly ash by utilizing gas flow according to claim 1, wherein: the air inlet pipe (100) comprises a first air inlet pipe (110) and a second air inlet pipe (120), and the first air inlet pipe (110) and the second air inlet pipe (120) are correspondingly arranged.
3. An apparatus for separating iron powder from desulfurized fly ash by utilizing gas flow as set forth in claim 2, wherein: a desulfurization ash groove (101) is arranged at one side of the first air inlet pipe (110) far away from the second air inlet pipe (120); the bottom of the desulfurization ash tank (101) is connected with a first air inlet pipe (110) through a conveying pipe (102); a desulfurization ash groove (101) is arranged at one side of the second air inlet pipe (120) far away from the first air inlet pipe (110); the bottom of the desulfurization ash tank (101) is connected with a first air inlet pipe (110) through a conveying pipe (102).
4. An apparatus for separating iron powder from desulfurized fly ash by utilizing gas flow as set forth in claim 2, wherein: an air pipe connecting part (130) is arranged between the first air inlet pipe (110) and the second air inlet pipe (120), and a gap between the air pipe connecting part (130) and the first electromagnet (210) and the second electromagnet (220) is correspondingly arranged.
5. A device for separating iron powder from desulfurized fly ash by utilizing gas flow according to claim 3, characterized in that: the device further comprises a pressurizing air tank (103), a sealing cover is arranged at the top of the desulfurization ash tank (101), and the pressurizing air tank (103) is connected with the desulfurization ash tank (101) through a pipeline.
6. An apparatus for separating iron powder from desulfurized fly ash by utilizing gas flow according to any one of claims 1-5, characterized in that: the bottom of the iron powder recycling cavity (200) is provided with a cavity contraction section (240), and the air inlet pipe (100) is connected with the bottom of the cavity contraction section (240).
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