CN110272069B - Vanadium pentoxide integrates stoving deamination oxidation melting film-making system - Google Patents
Vanadium pentoxide integrates stoving deamination oxidation melting film-making system Download PDFInfo
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- CN110272069B CN110272069B CN201910506991.3A CN201910506991A CN110272069B CN 110272069 B CN110272069 B CN 110272069B CN 201910506991 A CN201910506991 A CN 201910506991A CN 110272069 B CN110272069 B CN 110272069B
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Abstract
The invention relates to the technical field of vanadium oxide tabletting and discloses an integrated drying deamination, oxidization and melting tabletting system for vanadium pentoxide. It includes drum dryer, spraying evaporator, steam condensing equipment and fuse-element stove, drum dryer one side be connected with screw feeder, the screw feeder top is provided with the feed bin, drum dryer's top export is connected with the fuse-element stove through conveying pipeline and high temperature flue gas pipeline respectively, the bottom export has connected gradually bag collector and spraying evaporator through the pipeline, spraying evaporator top is passed through the pipeline and is connected with steam condensing equipment, conveying pipeline one end still be connected with air conveyor. The invention has low energy consumption, high vanadium recovery rate, short production period and environmental protection, and the cylinder dryer is arranged, and the high-temperature flue gas of the melting furnace is used as a drying heat source to separate the drying deamination and melting in the vanadium extraction production, thereby being more beneficial to the safe and efficient continuous production and simultaneously reducing the resource waste and the environmental pollution.
Description
Technical Field
The invention relates to the technical field of vanadium oxide tabletting, in particular to an integrated drying deamination oxidation melting tabletting system for vanadium pentoxide.
Background
Vanadium is an important metal element and has wide application in the fields of steel, chemical industry, building and the like, wherein about 85 to 90 percent of vanadium is applied to steel production in the form of vanadium pentoxide, and the vanadium pentoxide not only can refine grains, but also can improve the hardness and the wear resistance of steel. At present, the tablet vanadium pentoxide produced industrially in China is generally produced by a one-step method, and the process flow is as follows: cake ammonium polyvanadate with 30-50% water content obtained by hydrolysis, vanadium precipitation and filtration is fed into a melting furnace discontinuously, heated by heavy oil or coal gas, the temperature of a hearth is controlled to be about 900-1100 ℃, dehydration, deamination and oxidative melting of the materials are completed, then a melt flows out from a liquid outlet, and tablet vanadium pentoxide with a certain thickness is prepared on a rotating water-cooling disc sheet casting machine.
However, with the gradual increase of the demand of ferrovanadium, the national requirements on energy conservation and environmental protection are higher and higher, the existing one-step method has low production efficiency and vanadium recovery rate and high energy consumption, and in addition, the generated ammonia gas is directly discharged, and moreThe method has the advantages that the environment is seriously polluted, meanwhile, because the drying, the deamination and the melting are carried out in one furnace, the melting furnace is cooled during feeding, the continuous feeding and the discharging cannot be realized, the dried powdery vanadium pentoxide is easily blown away by hot air to enter a flue, the powdery vanadium pentoxide is discharged out of the furnace along with high-temperature flue gas without being melted, a large amount of high-temperature flue gas does not participate in heat exchange and directly enters the flue, the vanadium recovery rate and the heat utilization efficiency are further reduced, the energy consumption is increased, and the high-temperature flue gas (containing NH) discharged from the flue is high in energy consumption3And water vapor) can not be effectively utilized, most of the water vapor is directly discharged out of the air, and energy waste and environmental pollution are further aggravated. In addition, most of the height of the hearth of the existing melting furnace is fixed, materials are easy to stack in the melting process, the materials are not heated uniformly and oxidized slowly, the prepared melt cannot be transferred quickly and effectively, and the production period is greatly prolonged.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a vanadium pentoxide integrated drying, deamination, oxidation, melting and tabletting system which is low in energy consumption, high in vanadium recovery rate, short in production period, safe, efficient, green and environment-friendly.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a vanadic anhydride integrates stoving deamination oxidation melting film-making system, includes drum dryer, spray evaporator, steam condensing equipment and fuse-link stove, drum dryer one side be connected with screw feeder, the screw feeder top is provided with the feed bin, drum dryer's top export is connected with the fuse-link stove through conveying pipeline and high temperature flue gas pipeline respectively, the bottom export has connected gradually bag collector and spray evaporator through the pipeline, spray evaporator top pass through the pipeline and be connected with steam condensing equipment, conveying pipeline one end still be connected with pneumatic conveyor.
Preferably, the side of the top outlet of the roller dryer is connected with a hot blast stove through a pipeline, and draught fans are arranged on the pipeline connecting the bottom outlet with the bag type dust collector and the high-temperature flue gas pipeline.
The spray evaporator comprises a tower body with a vertical structure, wherein the bottom of the tower body is of a cone structure, support columns are uniformly arranged at the lower end of the cone, an air inlet pipe is arranged on the side wall of the tower body, an air outlet pipe is arranged at the top of the tower body, a discharge pipe is arranged at the bottom of the tower body, the air inlet pipe is connected with a bag type dust collector through a pipeline, the air outlet pipe is connected with a steam condensing device through a pipeline, and one end of the discharge pipe is connected with a storage tank;
the tower body is inside from the top down and is equipped with gas collecting channel, one-level shower head subassembly, second grade shower head subassembly and aeration pipe in proper order, gas collecting channel and outlet duct intercommunication, and gas collecting channel and outlet duct are and take interbedded hollow structure, one-level shower head subassembly evenly set up at gas collecting channel lower part edge, second grade shower head subassembly pass through the pipeline and be connected with the outside acid-proof pump that sets up, the intermediate layer of outlet duct on seted up the water inlet, the water inlet has the spraying pump through advancing water piping connection.
Preferably, the air inlet pipe is connected with a high-temperature centrifugal fan, and the discharge pipe is provided with a valve.
Preferably, the aeration pipes are uniformly distributed along the radial direction of the tower body.
Preferably, the primary and secondary showerhead assemblies include one or more showerheads.
Preferably, the tower body is further provided with an overflow port, and the overflow port is connected with the water inlet pipe through a circulating water pipe and a circulating pump.
Preferably, still be equipped with the PLC controller on the tower body and go deep into the inside ammonia concentration test probe of tower body, the PLC controller and ammonia concentration test probe and acid-proof pump electric connection.
Specifically, steam condensation collection device, including steam condensing tower and cooling water machine, steam condensing tower top is equipped with the second intake pipe, and the bottom is equipped with the fluid-discharge tube, the second intake pipe is connected with spraying evaporator top outlet duct, from the top down is equipped with condensation chamber, filter screen, collection liquid funnel in proper order in the tower, and condensation chamber body both sides are equipped with cooling water inlet tube and cooling water outlet pipe respectively, and collection liquid funnel bottom and fluid-discharge tube intercommunication, the fluid-discharge tube has connected gradually vapour dual-purpose pump and vapour and liquid separator, vapour and liquid separator is connected with first branch pipe and second branch pipe respectively, and first branch pipe passes through circulating fan, circulating line and is connected with steam condensing tower, and the second branch pipe passes through cooling water machine and advances water piping connection, collection liquid funnel lateral wall still be equipped with the outlet duct.
Preferably, the condensing chambers comprise a first condensing chamber, a second condensing chamber and a third condensing chamber, a partition plate is arranged between every two adjacent condensing chambers, and a through hole is formed in the partition plate.
Preferably, first condensation straight tube, second condensation straight tube and third condensation straight tube of even a plurality of ranges are equipped with respectively in first condensation chamber, second condensation chamber and the third condensation chamber, first condensation straight tube, second condensation straight tube and third condensation straight tube communicate each other, first condensation straight tube, second condensation straight tube and third condensation straight tube diameter reduce in proper order, and each condensation chamber condensation straight tube range interval crescent, first condensation straight tube one end and cooling water outlet pipe connection, third condensation straight tube one end and cooling water inlet pipe connection.
Preferably, the top of the steam condensing tower is further provided with an axial flow fan, the axial flow fan comprises an impeller and blades mounted on the impeller, and the impeller is connected with an external motor through a rotating shaft.
Preferably, the number of the axial flow fans is 2, and the axial flow fans are symmetrically distributed on two sides of the second air inlet pipe.
Preferably, the inlet of the circulation pipeline is higher than the level of the first condensation chamber of the steam condensation tower.
Preferably, the outlet duct on be equipped with electric valve, the outlet duct is close to album liquid funnel end and is equipped with the temperature probe who stretches out steam condensation tower body, the PLC controller electric connection that sets up on electric valve and the temperature probe and the steam condensation tower body.
Preferably, valves are arranged on the liquid discharge pipe, the first branch pipe, the second branch pipe, the circulating air pipe, the cooling water inlet pipe and the cooling water outlet pipe.
The melting furnace comprises a furnace body, wherein a feed inlet and a smoke outlet are formed in the top of the furnace body, a gas burner is arranged on the left side wall of the furnace body, a heat insulation steel plate, a heat insulation interlayer and a fire-resistant layer are sequentially arranged in the furnace body from outside to inside, the inner space of the fire-resistant layer is a furnace chamber, a trapezoidal hearth is arranged on one side, close to the gas burner, of the furnace chamber, a settling chamber is arranged on the other side of the trapezoidal hearth, a plurality of vertical air inlet pipelines are arranged in the trapezoidal hearth, the air inlet pipelines penetrate through the bottom of the furnace body and are connected with an air conveying pipeline, a liquid outlet groove and a slag discharge pipe are respectively arranged on the side surface and the bottom of the settling chamber, and a water-cooling disc casting machine is connected to the bottom of the liquid outlet groove; and the two sides of the heat insulation steel plate are respectively provided with an air inlet pipeline and an air outlet pipeline which extend into the heat insulation interlayer, and the air inlet pipeline is connected with a flue gas outlet through a fan and a second circulating pipeline.
Specifically, the feed inlet pass through conveying pipeline and drum dryer top exit linkage, feed inlet one side still is connected with the second bag collector, the pipeline of giving vent to anger pass through high temperature flue gas pipeline and drum dryer's top export intercommunication, carry out waste heat utilization for drum dryer with heat transfer in the fuse-element stove.
Preferably, the feed inlet be located trapezoidal hearth platform top, the vibration screening machine is installed at the feed inlet top, the vibration screening machine is provided with the tilting screen cloth, designs like this and more is favorable to screening vanadium mineral material to guarantee the homogeneity of material particle diameter, make the material react in the melting furnace fast abundant more.
Preferably, the gas burner is positioned above the trapezoidal hearth platform and below the feed inlet, and the gas burner is connected with an external gas source through a pipeline.
Preferably, a second gas burner and a third gas burner are further arranged on two sides of the feed inlet at the top of the furnace body respectively and are connected with an external gas source through pipelines.
Preferably, a vertical downward fire-blocking wall is arranged on one side, close to the flue gas outlet, of the top wall of the furnace chamber between the feeding port and the flue gas outlet.
Preferably, the top parts of the air inlet pipeline and the slag discharge pipe are respectively provided with a filter screen.
Preferably, a flue gas dust collecting device is further arranged between the flue gas outlet and the fan, and specifically, the flue gas dust collecting device can be a purification tank, a settling chamber or a dust collector.
Preferably, the flue gas dust collecting device is connected with a vibration screening machine arranged at the top of the feeding hole through conveying equipment, and specifically, the conveying equipment can be a screw conveyor or a lifting machine.
Preferably, the air outlet pipeline is also provided with a valve.
Compared with the prior art, the invention has the advantages that:
1. the vanadium pentoxide drying deamination oxidation melting flaking system provided by the invention has the advantages of low energy consumption, high vanadium recovery rate, short production period, safety, high efficiency, greenness and environmental protection, and the drying deamination and melting in the vanadium extraction production are separately carried out through the arrangement of the roller dryer, so that the temperature of the melting furnace is reduced, the full melting of the vanadium pentoxide is ensured, the occurrence of reduction reaction is avoided, the recovery rate is improved, and the energy consumption is reduced; drying deamination is carried out in the roller dryer, and the ammonium polyvanadate in the melting furnace is greatly reduced, so that the danger of explosion caused by overhigh water content in the high-temperature melting furnace is avoided, the continuous feeding and continuous discharging production is realized, and the production efficiency is improved.
2. The vanadium pentoxide drying deamination oxidation melting flaking system provided by the invention utilizes the high-temperature flue gas of the flaking furnace as the main heat source of the roller dryer, realizes the recycling of the high-temperature flue gas, improves the utilization efficiency of the high-temperature flue gas, reduces the resource waste and the environmental pollution, and reduces the production cost.
3. The bottom flue gas outlet of the roller dryer of the vanadium pentoxide drying deamination oxidation melting flaking system provided by the invention is sequentially connected with the bag type dust collector, the spray evaporator and the steam condensing device, so that the emission of flue gas is ensured to reach the national environmental protection standard, the problems of difficult treatment of waste water and waste gas and environmental pollution in the production process are effectively solved, and the roller dryer is more environment-friendly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of the spray evaporator of the present invention.
FIG. 3 is a schematic view of the structure of the steam condensing apparatus according to the present invention.
FIG. 4 is a schematic view of a fuse block furnace according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1-4, a vanadic anhydride integrates stoving deamination oxidation melting film-making system, including roller dryer 1, spraying evaporator 2, steam condensing unit 3 and fuse-element stove 4, roller dryer 1 one side is connected with screw feeder 5, and screw feeder 5 top is provided with feed bin 6, and roller dryer 1's top export is connected with fuse-element stove 4 through conveying pipeline 7 and high temperature flue gas pipeline 8 respectively, and the bottom export has connected gradually bag collector 9 and spraying evaporator 2 through the pipeline, 2 tops of spraying evaporator be connected with steam condensing unit 3 through the pipeline, 7 one end of conveying pipeline still be connected with pneumatic conveyor 10.
Preferably, the side of the export of 1 top of drum dryer still have hot-blast furnace 11 through the pipe connection, all be equipped with draught fan 12 on the pipeline that bottom export and bag collector 9 are connected and the high temperature flue gas pipeline 8, design simple structure not only like this, hot-blast furnace 11 is convenient for 1 auxiliary heating of drum dryer in addition, more is favorable to maintaining the material temperature of drum dryer 1, and draught fan 12 can accelerate the flow of flue gas to improve production efficiency.
Specifically, the spray evaporator 2 comprises a tower body 201 with a vertical structure, the bottom of the tower body 201 is in a cone structure, support columns 214 are uniformly arranged at the lower end of the cone, an air inlet pipe 202 is arranged on the side wall of the tower body 201, an air outlet pipe 203 is arranged at the top of the tower body 201, a discharge pipe 204 is arranged at the bottom of the tower body, the air inlet pipe 202 is connected with the bag type dust collector 9 through a pipeline, the air outlet pipe 203 is connected with the steam condensing device 3 through a pipeline, and one end of the discharge pipe 204 is connected with a storage tank 13 for collecting and recycling materials after the waste gas and the waste water react in the spray evaporator 2; inside from the top down of tower body 201 is equipped with gas collecting channel 205, one-level shower head subassembly 206, second grade shower head subassembly 207 and aeration pipe 208 in proper order, gas collecting channel 205 and outlet duct 203 intercommunication, and gas collecting channel 205 and outlet duct 203 are the hollow structure who takes intermediate layer 209, one-level shower head subassembly 206 evenly set up at gas collecting channel 205 lower part edge, second grade shower head subassembly 207 be connected with the outside acid-proof pump 210 that sets up through the pipeline, the intermediate layer 209 of outlet duct 203 on seted up water inlet 211, water inlet 211 is connected with spray pump 213 through inlet tube 212.
Preferably, the air inlet pipe 202 is connected with a high-temperature centrifugal fan 215, the high-temperature centrifugal fan 215 is used for introducing high-temperature waste gas in the vanadium ore production process into the evaporator, and the discharge pipe 204 is provided with a valve 216.
Preferably, the aeration pipes 208 are multiple and uniformly distributed along the radial direction of the tower body 201, so that the high-temperature waste gas is more uniformly and rapidly distributed in the tower body 201, the contact area of the waste gas and the waste water is increased, and the acceleration of the treatment efficiency is facilitated.
Preferably, the primary showerhead assembly 206 and the secondary showerhead assembly 207 include one or more showerheads 217. The first-level spray head assembly 206 is communicated with the water inlet pipe 212, wastewater is sucked into the water inlet pipe 212 by the spray pump 213 and flows into the tower for spraying, and the wastewater is preheated by the waste gas residual temperature of 203 in the gas outlet pipe in the interlayer 209 of the gas outlet pipe 203 and the gas collecting cover 205, so that the design not only further reduces the temperature of the flue gas outlet, but also is more beneficial to the quick reaction of the waste gas and the wastewater in the tower.
Preferably, the tower body 201 on still be equipped with overflow mouth 218, overflow mouth 218 pass through circulating pipe 219 and circulating pump 220 and be connected with inlet tube 212, the design makes the waste water that sprays after the high temperature flue gas primary treatment can enter into tower body 201 by circulating pump 220 and carry out the secondary cycle and handle like this, is favorable to further reducing the content of the poisonous and harmful substance in the waste water.
Preferably, the tower body 201 is further provided with a PLC (programmable logic controller) 221 and an ammonia concentration detection probe 222 which extends into the tower body 201, the PLC 221 is electrically connected with the ammonia concentration detection probe 222 and the acid-proof pump 210, the ammonia concentration detection probe 222 can detect the content of ammonia in the tower in real time and feed the ammonia content back to the PLC 221, and the PLC 221 controls the spraying amount of the acid liquor by adjusting the acid-proof pump 210, so that the production cost is saved, the resource waste and the environmental pollution are reduced, and the energy-saving and environment-friendly effects are achieved.
Specifically, the steam condensation collecting device 3 comprises a steam condensation tower 301 and a water cooling machine 302, wherein a second air inlet pipe 303 is arranged at the top of the steam condensation tower 301, a liquid discharge pipe 304 is arranged at the bottom of the steam condensation tower 301, and the second air inlet pipe 303 is connected with an air outlet pipe 203 at the top of the spray evaporator 2; the condensing chamber, the filter screen 305 and the liquid collecting funnel 306 are sequentially arranged from top to bottom in the tower, a cooling water inlet pipe 307 and a cooling water outlet pipe 308 are respectively arranged on two sides of a condensing chamber body, the bottom of the liquid collecting funnel 306 is communicated with a liquid discharge pipe 304, the liquid discharge pipe 304 is sequentially connected with a dual-purpose water vapor pump 309 and a gas-liquid separator 310, the gas-liquid separator 310 is respectively connected with a first branch pipe 311 and a second branch pipe 312, the first branch pipe 311 is connected with the steam condensing tower 301 through a circulating fan 313 and a circulating pipeline 314, the second branch pipe 312 is connected with the cooling water inlet pipe 307 through a water cooling machine 302, and an air outlet pipe 315 is further arranged on the side wall of the liquid collecting funnel 306.
Specifically, the condensation chamber includes first condensation chamber 316, second condensation chamber 317 and third condensation chamber 318, is equipped with baffle 319 between two adjacent condensation chambers, is equipped with through-hole 320 on the baffle 319, and design hot steam can get into each condensation chamber through-hole 320 like this, is convenient for carry out condensation step by step to steam for the condensation is more abundant, has improved the condensation effect greatly.
Preferably, a plurality of first condensation straight pipes 321, a plurality of second condensation straight pipes 322 and a plurality of third condensation straight pipes 323 which are uniformly arranged are respectively arranged in the first condensation chamber 316, the second condensation chamber 317 and the third condensation chamber 318, the first condensation straight pipes 321, the second condensation straight pipes 322 and the third condensation straight pipes 323 are communicated with each other, the diameters of the first condensation straight pipes 321, the diameters of the second condensation straight pipes 322 and the third condensation straight pipes 323 are sequentially reduced, the arrangement distance of the condensation straight pipes in each condensation chamber is gradually increased, one end of each first condensation straight pipe 321 is connected with the cooling water outlet pipe 308, and one end of each third condensation straight pipe 323 is connected with the cooling water inlet pipe 307.
Preferably, the top of the steam condensation tower 1 is further provided with an axial flow fan 324, the axial flow fan 324 comprises an impeller 325 and blades 326 mounted on the impeller 325, and the impeller 325 is connected with an external motor 328 through a rotating shaft 327.
Preferably, the number of the axial flow fans 324 is 2, and the axial flow fans are symmetrically distributed on two sides of the second air inlet pipe 303.
Preferably, the inlet of the circulation pipe 314 is higher than the level of the first condensation chamber 316 of the steam condensation tower 301.
Preferably, an electric valve 329 is arranged on the air outlet pipe 315, a temperature probe 330 extending out of the steam condensation tower 301 is arranged at the end of the air outlet pipe 315 close to the liquid collecting funnel 306, and the electric valve 329 and the temperature probe 330 are electrically connected with a PLC 331 arranged on the steam condensation tower 301.
Specifically, valves 332 are arranged on the drain pipe 304, the first branch pipe 311, the second branch pipe 312, the circulating pipeline 313, the cooling water inlet pipe 307 and the cooling water outlet pipe 308.
Specifically, the fuse-element furnace 4 comprises a furnace body 401, wherein a feed inlet 402 and a flue gas outlet 403 are arranged at the top of the furnace body 401, a gas burner 404 is arranged on the left side wall of the furnace body 401, a heat insulation steel plate 405, a heat insulation interlayer 406 and a fire-resistant layer 407 are sequentially arranged from outside to inside of the furnace body 401, the inner space of the fire-resistant layer 407 is a furnace chamber 408, a trapezoidal furnace bed 409 is arranged on one side of the furnace chamber 408 close to the gas burner 404, a settling chamber 410 is arranged on the other side of the trapezoidal furnace bed 409, a plurality of vertical air inlet pipes 411 are arranged in the trapezoidal furnace bed 409, the air inlet pipes 411 penetrate through the bottom of the furnace body 401 and are connected with an air conveying pipe 412, a liquid outlet groove 413 and a slag discharge pipe 414 are respectively arranged on the side surface and the bottom of the settling chamber 410, and a water-cooling disc casting machine 415 is connected to the bottom of the liquid outlet groove 413; and an air inlet pipeline 416 and an air outlet pipeline 417 extending into the heat insulation interlayer 406 are respectively arranged at two sides of the heat insulation steel plate 405, and the air inlet pipeline 416 is connected with the flue gas outlet 403 through a fan 418 and a second circulating pipeline 419.
Preferably, the feed inlet 402 is connected with the top outlet of the roller dryer 1 through a material conveying pipeline 7, one side of the feed inlet 402 is also connected with a second bag type dust collector 14, the air outlet pipeline 417 is communicated with the top outlet of the roller dryer 1 through a high-temperature flue gas pipeline 8, and heat in the melting furnace 4 is transferred to the roller dryer 1 for waste heat utilization.
Preferably, the feeding port 402 is located above the platform of the trapezoidal hearth 409, the vibrating screen machine 420 is installed at the top of the feeding port 402, the vibrating screen machine 420 is provided with the inclined screen 421, the design is more favorable for screening vanadium mineral materials, the uniformity of the particle size of the materials is ensured, and the materials react more quickly and sufficiently in the melting furnace.
Preferably, the gas burner 404 is located above the platform of the trapezoidal hearth 409 and below the feed inlet 402, and the gas burner 404 is connected with an external gas source through a pipeline.
Preferably, a second gas burner 422 and a third gas burner 423 are respectively arranged on two sides of the feed inlet 402 at the top of the furnace body 401, and the second gas burner 422 and the third gas burner 423 are connected with an external gas source through pipelines.
Preferably, a vertical downward fire wall 424 is arranged on one side of the top wall of the furnace chamber 408 between the feed port 402 and the flue gas outlet 403, which is close to the flue gas outlet 403, and is used for reflecting high-temperature flue gas, so that the utilization rate of the flue gas is improved, and the flue gas is prevented from directly flowing out from the flue gas outlet 3 without reaction.
Preferably, the top of the air inlet duct 411 and the top of the slag discharge pipe 414 are both provided with a filter screen 425, so that the occurrence of blockage is reduced, and the smooth production is facilitated.
Preferably, a flue gas dust collecting device 426 is further arranged between the flue gas outlet 403 and the fan 418, and specifically, the flue gas dust collecting device 426 may be a purification tank, a sedimentation tank or a dust collector, and is used for recovering and collecting powder materials in the high-temperature flue gas, so as to be recycled.
Preferably, the flue gas dust collecting device 426 is connected to the vibrating screen 420 installed on the top of the feeding port 402 through a conveying device 427, and specifically, the conveying device 427 may be a screw conveyor or a lifter.
Preferably, a valve 428 is further disposed on the outlet pipe 417.
The specific working process of the invention is as follows:
ammonium vanadate as a raw material is conveyed into a roller dryer 1 through a bin 6 and a screw feeder 5, tail gas generated in a fuse-link furnace 4 enters the roller dryer 1 through a high-temperature flue gas pipeline 8 to dry and deaminate the raw material, an auxiliary heat source hot air furnace 11 can be opened to maintain or accelerate the drying and deamination efficiency if necessary, mixed flue gas of ammonia, vapor and the like generated in the drying process sequentially enters a bag type dust collector 9, a spray evaporator 2 and a steam cooling device 3 through pipelines to be treated, the ammonia and the vapor are recycled, and the residual gas is discharged after reaching the standard; meanwhile, the dried and deaminated material is sent into a melting furnace 4 for melting through a material conveying pipeline 7 and a pneumatic conveyor 10, tail gas generated in the melting process flows into a high-temperature flue gas pipeline 8 for recycling, and vanadium pentoxide liquid prepared by melting flows into a water-cooling disc casting machine 415 from a liquid outlet groove 413 for treatment to prepare vanadium tablets.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a vanadic anhydride integrates stoving deamination oxidation melting film-making system which characterized in that: the device comprises a roller dryer (1), a spray evaporator (2), a steam condensing device (3) and a fuse piece furnace (4), wherein one side of the roller dryer (1) is connected with a screw feeder (5), a bin (6) is arranged above the screw feeder (5), a top outlet of the roller dryer (1) is respectively connected with the fuse piece furnace (4) through a material conveying pipeline (7) and a high-temperature flue gas pipeline (8), a bottom outlet is sequentially connected with a bag type dust collector (9) and the spray evaporator (2) through pipelines, the top of the spray evaporator (2) is connected with the steam condensing device (3) through a pipeline, and one end of the material conveying pipeline (7) is also connected with a pneumatic conveyor (10);
the side of the top outlet of the roller dryer (1) is also connected with a hot blast stove (11) through a pipeline, and a draught fan (12) is arranged on the pipeline connecting the bottom outlet with the bag type dust collector (9) and on the high-temperature flue gas pipeline (8).
2. The vanadium pentoxide integration drying deamination oxidation melting tabletting system of claim 1, wherein: the spray evaporator (2) comprises a tower body (201) with a vertical structure, wherein the bottom of the tower body (201) is of a cone structure, support columns (214) are uniformly arranged at the lower end of the cone, an air inlet pipe (202) is arranged on the side wall of the tower body (201), an air outlet pipe (203) is arranged at the top of the tower body (201), a discharge pipe (204) is arranged at the bottom of the tower body, a gas collecting hood (205), a primary spray head assembly (206), a secondary spray head assembly (207) and an aeration pipe (208) are sequentially arranged in the tower body (201) from top to bottom, the gas collecting hood (205) is communicated with the air outlet pipe (203), the gas collecting hood (205) and the air outlet pipe (203) are both of a hollow structure with an interlayer (209), the primary spray head assembly (206) is uniformly arranged at the edge of the lower part of the gas collecting hood (205), the secondary spray head assembly (207) is connected with an acid-resistant pump (210) arranged outside through a pipeline, and a water inlet (211) is arranged on the interlayer (209) of the air outlet pipe (203), the water inlet (211) is connected with a spray pump (213) through a water inlet pipe (212).
3. The vanadium pentoxide integration drying deamination oxidation melting tabletting system of claim 2, wherein: the air inlet pipe (202) is connected with the bag type dust collector (9) through a pipeline, the air outlet pipe (203) is connected with the steam condensing device (3) through a pipeline, and one end of the discharge pipe (204) is connected with the storage tank (13).
4. The vanadium pentoxide integration drying deamination oxidation melting tabletting system of claim 1, wherein: the steam condensing device (3) comprises a steam condensing tower (301) and a water cooling machine (302), wherein a second air inlet pipe (303) is arranged at the top of the steam condensing tower (301), a liquid discharge pipe (304) is arranged at the bottom of the steam condensing tower, a condensing chamber, a filter screen (305) and a liquid collecting funnel (306) are sequentially arranged in the tower from top to bottom, a cooling water inlet pipe (307) and a cooling water outlet pipe (308) are respectively arranged on two sides of a condensing chamber body, the bottom of the liquid collecting funnel (306) is communicated with the liquid discharge pipe (304), the liquid discharge pipe (304) is sequentially connected with a water vapor dual-purpose pump (309) and a gas-liquid separator (310), the gas-liquid separator (310) is respectively connected with a first branch pipe (311) and a second branch pipe (312), the first branch pipe (311) is connected with the steam condensing tower (301) through a circulating fan (313) and a circulating pipeline (314), and the second branch pipe (312) is connected with the cooling water inlet pipe (307) through the water cooling machine (302), the side wall of the liquid collecting funnel (306) is also provided with an air outlet pipe (315).
5. The vanadium pentoxide integration drying deamination oxidation melting tabletting system of claim 4, wherein: and the second air inlet pipe (303) is connected with an air outlet pipe (203) at the top of the spraying evaporator (2).
6. The vanadium pentoxide integration drying deamination oxidation melting tabletting system of claim 1, wherein: the fuse piece furnace (4) comprises a furnace body (401), a feed inlet (402) and a flue gas outlet (403) are arranged at the top of the furnace body (401), a gas burner (404) is arranged on the left side wall of the furnace body (401), a heat insulation steel plate (405), a heat insulation interlayer (406) and a fire-resistant layer (407) are sequentially arranged on the furnace body (401) from outside to inside, the inner space of the fire-resistant layer (407) is a furnace chamber (408), one side of the furnace chamber (408) close to the gas burner (404) is provided with a trapezoidal hearth (409), the other side of the trapezoidal hearth (409) is provided with a settling chamber (410), a plurality of vertical air inlet pipelines (411) are arranged in the trapezoidal hearth (409), the air inlet pipeline (411) penetrates through the bottom of the furnace body (401) and is connected with an air conveying pipeline (412), the side surface and the bottom of the settling chamber (410) are respectively provided with a liquid outlet tank (413) and a slag discharge pipe (414), and the bottom of the liquid outlet tank (413) is connected with a water-cooling disc sheet casting machine (415); and an air inlet pipeline (416) and an air outlet pipeline (417) extending into the heat-insulating interlayer (406) are respectively arranged on two sides of the heat-insulating steel plate (405), and the air inlet pipeline (416) is connected with the flue gas outlet (403) through a fan (418) and a second circulating pipeline (419).
7. The vanadium pentoxide integration drying deamination oxidation melting tabletting system of claim 6, wherein: feed inlet (402) pass through conveying pipeline (7) and drum dryer (1) top exit linkage, feed inlet (402) one side still is connected with second bag collector (14), outlet duct (417) pass through the top export intercommunication of high temperature flue gas pipeline (8) and drum dryer (1).
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| CN103011289A (en) * | 2011-09-28 | 2013-04-03 | 黄明华 | Continuous device for preparing vanadium pentoxide from ammonium metavanadate |
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