CN210180189U - Non-stop submerged arc furnace flue gas micro silicon powder recovery system - Google Patents

Abstract

A kind of non-stop ore-smelting furnace smoke micro-silicon powder recovery system, including incinerator, exhaust-heat boiler, micro-silicon powder separator, negative pressure fan, synchronous back-blowing dust-collecting equipment, the synchronous back-blowing dust-collecting equipment includes disk change-over valve, bag dust collector, the disk change-over valve set up in the utility model can guarantee bag dust collector, bag dust collector in bag dust collector, bag dust collector is in back-blowing body all the time, and two bag dust collectors are in dust-collecting state all the time, thus realizing bag dust collector back-blowing non-stop, avoiding the production interruption caused by back-blowing, the multi-row rack set up and down alternately on the separation box can make dust and steel ball fully separate, the heat generated after the carbon monoxide gas burns in the incinerator is sent into exhaust-heat boiler again, the high temperature smoke is after the pressure, and then the waste heat boiler is fed into the waste heat boiler, so that the heating surface of the waste heat boiler is uniformly heated, and the working condition of the waste heat boiler is stable.

Description

Non-stop submerged arc furnace flue gas micro silicon powder recovery system

Technical Field

The utility model relates to a waste heat boiler technical field, in particular to ore smelting furnace flue gas silica fume recovery system does not shut down.

Background

The waste heat power generation technology has the obvious characteristics of fully utilizing industrial waste heat and realizing 'combined heat and power', can achieve the dual purposes of emission reduction and income increase, and is the best scheme and the best energy saving mode for scientific conversion of industrial waste heat. The submerged arc furnace is generally divided into three furnace types, wherein the first furnace type is a full-closed type, the second furnace type is a semi-closed type with a short smoke hood, and the third furnace type is an open type with a high smoke hood. The semi-closed furnace has large smoke volume, is suitable for heat exchange power generation by adopting a waste heat boiler, has the thermal efficiency of about 26-28 percent, but has the difficulty that the diameter of most dust in the smoke is 0.1-0.5 um, and the particles have different cohesiveness in different temperature areas and humidity and are very easy to adhere to the surfaces of a chimney, a flue and a metal pipe, so that the heat exchange efficiency of a heat exchange surface is reduced sharply. The publication number of the steel ball dust removal type submerged arc furnace waste heat boiler published by the Chinese intellectual property office is CN 101701775A. The invention adopts a steel ball scattering device arranged at the top of a furnace, a steel ball separating and collecting device is arranged below an ash hopper at the bottom of the furnace, the steel ball separating and collecting device conveys the collected steel balls to a steel ball conveying hopper, then the steel ball conveying hopper filled with the steel balls is conveyed to the upper part of the steel ball scattering device through a circulating type steel ball mechanical conveying device, the steel balls are poured into the steel ball scattering device through the steel ball conveying hopper through a mechanical unloading catch wheel, the steel ball scattering device scatters the steel balls into a submerged arc furnace waste heat boiler, and thus the dust removal is realized by knocking a heating surface through the steel balls with kinetic energy. However, this invention has the following disadvantages: the steel ball separating and collecting device has poor separating effect on dust and steel balls, and the dust removal efficiency is not high. When more than two submerged arc furnaces share one waste heat boiler, the exhaust amount of different submerged arc furnaces is unstable, the working condition of the waste heat boiler is unstable, the effect of waste heat utilization is influenced, carbon monoxide contained in the flue gas is directly discharged to the atmosphere, the environment pollution is caused, and energy resources are wasted. The micro silicon powder which is a byproduct recovered from the flue gas is proved to be a valuable commodity through research and utilization, a bag-type dust collector is mostly adopted for recovering the micro silicon powder, the bag-type dust collector needs to be subjected to back flushing after being used for a period of time so as to recover the dust re-removing capability, and the frequent back flushing operation causes production interruption and influences the normal production.

Disclosure of Invention

In view of the above, there is a need to provide a system for recovering fine silicon powder from flue gas of a non-stop submerged arc furnace, which can not only effectively utilize carbon monoxide in the flue gas, but also effectively separate dust and steel balls.

A non-stop recovery system for fume and micro silicon powder of ore-smelting furnace is composed of an incinerator with a semi-spherical sealed body, a afterheat boiler with a central fume collecting port, a micro silicon powder separator, a negative-pressure blower, and a synchronous back-blowing duster, and features that said incinerator has a semi-spherical sealed body, the left end of said body is circular, several fume inlets are uniformly arranged on said left end, each inlet is connected to the high-temp fume outlet of ore-smelting furnace, the right end of said body is semi-spherical, and said fume collecting port is connected to the upper inlet of fume channel of afterheat boiler The boiler comprises a boiler flue gas channel and a boiler bottom, wherein a sealed channel is formed around the heating surface of a boiler, the boiler bottom is arranged at the bottom of the boiler flue gas channel, the boiler bottom is provided with a steel ball collecting device, the steel ball collecting device comprises a separation box, a valve body, a valve core, an inclined flow pipe, a flexible connection, a first connecting rod, a second connecting rod, a third connecting rod and a balancing weight, the upper end and the lower end of the separation box are open, the upper end of the separation box is open and connected with the lower end of the flue gas channel, so that a steel ball smoke dust mixture in the flue gas channel enters the separation box, a plurality of rows of racks are arranged in the separation box from top to bottom, the racks are horizontally arranged columnar bodies, the racks are arranged in a staggered manner, one side of the separation box is provided with a smoke dust outlet, a screen is arranged on the smoke outlet, the screen, one side of the valve body is provided with a steel ball outlet which is connected with an inlet of the inclined flow pipe, an outlet of the inclined flow pipe is connected with a flexibly connected inlet, the outer side wall of the valve core is connected with the inner side wall of the valve body in a sealing way, the valve core can linearly move up and down along the side wall of the valve body, the top wall of the valve core is designed in an inclined way, the top wall of the valve core extends towards one side of the steel ball outlet, a first rotating shaft and a second rotating shaft are fixed at the bottom of the furnace, the upper end of a first connecting rod is hinged with the valve core, the left end of a second connecting rod is hinged with the middle end of the first connecting rod, the right end of the second connecting rod is provided with a balancing weight, the middle end of the second connecting rod is rotatably connected with the first rotating shaft, the upper end of a third connecting rod is hinged with the lower end of the first connecting rod, the lower end of the third connecting rod is a free, the synchronous back-blowing dust removal device comprises a disc change-over valve, a bag-type dust remover II and a bag-type dust remover III, the disc change-over valve comprises a cylindrical valve body and an 8-shaped rotary cover, the valve body is hollow, a total air inlet is arranged on the right circular end face of the valve body, the total air inlet is connected with an outlet of a negative pressure fan, a first air outlet, a second air outlet and a third air outlet are arranged on the left circular end face of the valve body, the diameters of the first air outlet, the second air outlet and the third air outlet are the same, the first air outlet, the second air outlet and the third air outlet are uniformly distributed in the circle center of the left end face, the first air outlet, the second air outlet and the third air outlet are respectively connected with the flue gas inlet of the bag-type dust remover I, the bag-type dust remover II, The diameter of the first back flushing port, the second back flushing port and the third back flushing port are the same, the first back flushing port, the second back flushing port and the third back flushing port are uniformly distributed in the circle center of the left side end face, the first back flushing port, the second back flushing port and the third back flushing port are respectively connected with the air inlet connecting back flushing air inlet of the first bag-type dust collector, the second bag-type dust collector and the third bag-type dust collector through pipelines, the center of the first air outlet, the center of the first back flushing port and the circle center of the left side end face of the valve body are collinear, the distance from the center of the first back flushing port to the circle center of the left side end face of the valve body is smaller than that from the center of the first air outlet to the circle center of the left side end face of the valve body, the 8-shaped rotary cover is arranged inside the valve body, the 8-shaped rotary cover is provided with a large end cover and a small, the 8-shaped rotating cover is driven by a stepping motor and rotates relative to the valve body, the center of the large end cover, the center of the communicating port and the center of the small end cover are collinear, the communicating port is located between the large end cover and the small end cover, the diameter of the large end cover is larger than the distance from the center of the first back flushing port to the center of the left end face of the valve body, the diameter of the large end cover is smaller than the distance from the center of the first air outlet to the center of the left end face of the valve body, the diameter of the small end cover is larger than the diameter of the first air outlet, the distance from the center of the small end cover to the center of the left end face of the valve body is equal to the distance from the center of the left end face.

Preferably, the micro silicon powder separator comprises a separation barrel and an air outlet pipe, the inner cavity of the separation barrel is a closed space, the upper section of the separation barrel is a cylinder, the lower section of the separation barrel is a cone, the upper part of the separation barrel is provided with a left air inlet and a right air inlet, the left air inlet and the right air inlet are identical in structure, the left air inlet and the right air inlet are uniformly distributed along the annular wall of the separation barrel, the left air inlet and the right air inlet are both vertically arranged so that high-temperature flue gas reversely and horizontally enters the inner cavity of the upper section of the separation barrel by a tangent line of the upper section of the separation barrel, the air inlet directions of the left air inlet and the right air inlet are identical, the air outlet pipe is mounted at the top of the separation barrel, the upper end of the air outlet pipe is exposed out of the separation barrel, the lower end of the air outlet pipe, and the upper end port of the air outlet pipe is connected with an inlet of the negative pressure fan.

Preferably, the ratio of the pipe diameter of the air outlet pipe to the pipe diameter of the upper section of the separation cylinder is 2, the ratio of the height value of the left air inlet to the width value of the left air inlet is 2, and the ratio of the height value of the separation cylinder to the height value of the lower section of the separation cylinder is 2.

Preferably, the waste heat boiler further comprises a boiler top arranged at the top of the boiler flue gas channel, a steel ball scattering device is arranged on the boiler top, the steel ball scattering device comprises a scattering and collecting hopper and a steel ball scattering and guiding device, and the steel ball scattering and guiding device is arranged below the scattering and collecting hopper and is connected with an output port of the scattering and collecting hopper; the steel ball scattering guide device comprises a cylindrical pipeline and at least three dispersion pipes; the upper end of the cylindrical pipeline is communicated with an output port of the scattering and collecting hopper, the lower end of the cylindrical pipeline is communicated with one end of each dispersion pipe, and the other ends of the three dispersion pipes are connected with the top of the boiler and communicated with a flue gas channel of the boiler so as to uniformly scatter the steel balls on the heated surface of the boiler.

Preferably, the exhaust-heat boiler further comprises a circulating steel ball conveying device, the circulating steel ball conveying device comprises a driving gear, three driven gears, double rows of chains, a steel ball conveying hopper, a horizontal correcting rod and a reverse rotating wheel, the driving gear and the three driven gears are sequentially arranged at four corners of the supporting frame, the double rows of chains are sequentially wound on the driving gear and the three driven gears to form a closed rectangular chain ring, the steel ball conveying hopper is hung between two chains of the double rows of chains, the steel ball conveying hopper can rotate around the rotating center of the double rows of chains in a vertical plane relatively, the steel ball conveying hoppers are uniformly distributed along the rectangular chain ring, the gravity center of the steel ball conveying hopper deviates to one side of the rotating center of the steel ball conveying hopper, so that the steel ball conveying hopper can restore the state that the opening end of the steel ball conveying hopper faces upwards by virtue of the gravity, and, the horizontal correcting rod is positioned above the horizontal section below the annular part of the rectangular chain, the horizontal correcting rod is horizontally arranged along the length direction of the horizontal section below the annular part of the rectangular chain, two ends of the horizontal correcting rod are bent upwards so as to enable the end surface of the open end of a steel ball conveying hopper on the horizontal section below the annular part of the rectangular chain to be horizontally moved close to the lower part of the horizontal correcting rod, a stirring piece is arranged on the steel ball conveying hopper, the steel ball conveying hopper on the horizontal section below the annular part of the rectangular chain moves rightwards, the stirring piece stirs the free end of the third connecting rod to rotate around a second rotating shaft so as to enable steel balls in the valve body to fall from a steel ball outlet and enter the steel ball conveying hopper through an inclined flow pipe and flexible connection in sequence, the reverse rotating wheel is positioned below the horizontal section above the annular part of the rectangular chain, the steel ball conveying hopper on the horizontal section above the annular part of the rectangular chain moves left, so that the steel ball transporting hopper rotates around the rotation center of the double-row chain relatively to the double-row chain, so that the steel balls in the steel ball transporting hopper are poured into the spreading and collecting hopper, and the bottom of the steel ball transporting hopper in a 90-degree reverse rotation state is higher than the top of the reverse rotation wheel, so that the steel ball transporting hopper runs leftwards.

The utility model discloses a be equipped with the separator box among the steel ball collection device, the multirow rack of crisscross setting from top to bottom of separator box enables behind the mixture entering separator box of dust and steel ball, steel ball and dust random access clearance between the rack, because steel ball and dust random distribution between multirow rack, this just can make steel ball and dust from the top abundant fraction open in whole separator box, be favorable to the dust to discharge from the smoke and dust export under negative-pressure air fan's effect, and the steel ball is because the relative dust of weight is very much, get into the valve body under the effect of gravity, dust and steel ball can the intensive separation.

The utility model discloses in, after the high temperature flue gas that the hot stove in ore deposit produced got into the incinerator, carbon monoxide in the high temperature flue gas and the oxygen combustion in the air that comes from air inlet produced carbon dioxide, has reduced the gaseous emission of carbon monoxide, and the waste heat boiler is sent into again to the heat that generates after the gaseous combustion of carbon monoxide for chemical energy in the high temperature flue gas turns into heat energy, can make full use of.

The utility model discloses in, the high temperature flue gas pressure that the hot stove in different ore deposit produced is different, and after the high temperature flue gas of the hot stove in different ore deposit got into incinerator, burnt the effect that the burning furnace had played the buffer tank for the high temperature flue gas pressure in the burning furnace is even, and the high temperature flue gas gets into exhaust-heat boiler after burning the internal pressure stabilization of burning furnace again, makes exhaust-heat boiler receive the hot side and is heated evenly, and exhaust-heat boiler working condition is stable.

The utility model discloses in, high temperature flue gas gets into from flue gas reposition of redundant personnel entry and burns burning furnace, converges mouthful outflow from the flue gas and burns burning furnace, because the furnace chamber that burns burning furnace is the sphere, converges mouthful from the gas reposition of redundant personnel inflow entrance to the flue gas and forms a curved surface furnace chamber that roughly is the toper, and this furnace chamber smooth transition has reduced the vortex and the torrent ability that burn burning furnace high temperature flue gas, has reduced the energy consumption of bleeding, has still improved the gas charging efficiency in the burning furnace, has improved carbon monoxide combustion efficiency.

The utility model discloses in, burn the air inlet of burning furnace and the setting of flue gas reposition of redundant personnel entry syntropy, carbon monoxide and the syntropy flow of air in the burning furnace have increased the time of abundant contact.

The utility model discloses well disc change-over valve that sets up can guarantee a sack cleaner, and a sack cleaner in No. two sack cleaners, the No. three sack cleaners is in all the time and is in the blowback body, and is in the dust removal state all the time for two sack cleaners in addition to realize that the sack cleaner blowback does not shut down, avoided causing the interrupt of production because of the blowback.

Drawings

FIG. 1 is a schematic structural diagram of the system for recovering the fume micro-silicon powder of the non-stop submerged arc furnace.

Fig. 2 is a longitudinal sectional view of the disk changeover valve.

Fig. 3 is a longitudinal sectional view of the valve body.

Fig. 4 is a schematic structural view of the rotary cover.

Fig. 5 is a schematic structural diagram of the waste heat boiler.

FIG. 6 is a schematic structural view of the steel ball collecting device.

In the figure: the waste heat boiler 10, the steel ball collecting device 11, the separating box 111, the rack 1111, the smoke outlet 1112, the valve body 112, the steel ball outlet 1121, the valve core 113, the inclined flow pipe 114, the flexible connection 115, the first connecting rod 116, the second connecting rod 117, the first rotating shaft 1171, the third connecting rod 118, the second rotating shaft 1181, the counterweight 119, the steel ball scattering device 12, the scattering and collecting hopper 121, the steel ball scattering and guiding device 122, the cylindrical pipe 1221, the dispersing pipe 1222, the circulating steel ball conveying device 13, the driving gear 131, the driven gear 132, the double-row chain 133, the steel ball conveying hopper 134, the stirring piece 1341, the horizontal correcting rod 135, the reverse rotating wheel 136, the incinerator 20, the furnace body 21, the flue gas split-flow inlet 211, the flue gas collecting port 212, the air inlet 213, the micro-heated furnace powder separator 30, the separating cylinder 31, the left air inlet 311, the right air inlet 312, the air outlet 32, the ore-smelting furnace 40, the disc switch valve 61, the valve body 611, the main air inlet 6111, the first air outlet 6112, the second air outlet 6113, the third air outlet 6114, the first back-blowing port 6115, the second back-blowing port 6116, the third back-blowing port 6117, the rotary cover 612, the large end cover 6121, the small end cover 6122, the communication port 61221, the first bag-type dust collector 62, the second bag-type dust collector 63 and the third bag-type dust collector 64.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Referring to fig. 1 to 6, an embodiment of the present invention provides a non-stop system for recovering fume and microsilica from a submerged arc furnace, including an incinerator 20, an exhaust-heat boiler 10, a microsilica separator 30, a negative pressure fan 50, and a synchronous reverse-blowing dust-removing device 60, wherein the incinerator 20 has a closed hemispherical furnace body 21, the left end surface of the furnace body 21 is a circular plane, a plurality of fume-diverting inlets 211 are uniformly distributed on the left end surface, each fume-diverting inlet 211 is connected corresponding to a high-temperature fume-discharging port of the submerged arc furnace 40, the right end surface opposite to the left end surface is a hemispherical surface, the center of the right end surface has a fume-collecting port 212, the fume-collecting port 212 is connected to an upper end inlet of a fume channel of the exhaust-heat boiler 10, the left end surface of the furnace body 21 also has an air inlet 213, so that carbon monoxide in high-temperature fume entering the furnace body 21, the heat released by carbon monoxide combustion is transmitted to a waste heat boiler 10, the waste heat boiler 10 comprises a boiler heating surface formed by a serpentine pipe group, a boiler flue gas channel forming a sealed channel around the boiler heating surface, and a furnace bottom arranged at the bottom of the boiler flue gas channel, the furnace bottom is provided with a steel ball collecting device 11, the steel ball collecting device 11 comprises a separation box 111, a valve body 112, a valve core 113, an inclined flow pipe 114, a flexible connection 115, a first connecting rod 116, a second connecting rod 117, a third connecting rod 118 and a counterweight 119, the upper end and the lower end of the separation box 111 are open, the upper end opening of the separation box 111 is connected with the lower end opening of the flue gas channel, so that a steel ball smoke dust mixture in the flue gas channel enters the separation box 111, a plurality of rows of racks 1111 are arranged from top to bottom in the separation box 111, the racks 1111 are horizontally arranged columnar bodies, the racks 1111 between two adjacent rows, a screen mesh is arranged on the smoke outlet 1112, the mesh of the screen mesh is smaller than the diameter of the steel balls, the upper end and the lower end of the valve body 112 are open, the upper end opening of the valve body 112 is connected with the lower end opening of the separation box 111, one side of the valve body 112 is provided with a steel ball outlet 1121, the steel ball outlet 1121 is connected with the inlet of the oblique flow pipe 114, the outlet of the oblique flow pipe 114 is connected with the inlet of the flexible connection 115, the outer side wall of the valve core 113 is hermetically connected with the inner side wall of the valve body 112, the valve core 113 can linearly move up and down along the side wall of the valve body 112, the top wall of the valve core 113 is obliquely designed, the top wall of the valve core 113 extends towards one side of the steel ball outlet 1121 in an oblique manner, the first rotating shaft 1171 and the second rotating shaft 1181 are fixed on the furnace bottom, the upper end of the first connecting rod 116 is hinged with the valve core 113, the left, the upper end of the third connecting rod 118 is hinged with the lower end of the first connecting rod 116, the lower end of the third connecting rod 118 is a free end, the middle end of the third connecting rod 118 is rotatably connected with the second rotating shaft 1181, the smoke outlet 1112 is connected with the inlet of the silica fume separator 30, the outlet of the silica fume separator 30 is connected with the inlet of the negative pressure fan 50, the synchronous reverse blowing dust removing device 60 comprises a disc switching valve 61, a first bag-type dust remover 62, a second bag-type dust remover 63 and a third bag-type dust remover 64, the disc switching valve 61 comprises a cylindrical valve body 611 and an 8-shaped rotating cover 612, the valve body 611 is hollow, the right circular end face of the valve body 611 is provided with a main air inlet 6111, the main air inlet 6111 is connected with the outlet of the negative pressure fan 50, the left circular end face of the valve body 611 is provided with a first air outlet 6112, a second air outlet 6113, a third air outlet 6114, the first air outlet 6112, the first air outlet 6112, the second air outlet 6113 and the third air outlet 6114 are uniformly distributed from the center of the left end face, the first air outlet 6112, the second air outlet 6113 and the third air outlet 6114 are respectively connected with the flue gas inlets of the first bag-type dust collector 62, the second bag-type dust collector 63 and the third bag-type dust collector 64 through pipelines, the left circular end face of the valve body 611 is further provided with a first back-blowing port 6115, a second back-blowing port 6116 and a third back-blowing port 6117, the diameters of the first back-blowing port 6115, the second back-blowing port 6116 and the third back-blowing port 6117 are the same, the first back-blowing port 6115, the second back-blowing port 6116 and the third back-blowing port 6117 are respectively connected with the back-blowing air inlets of the first bag-type dust collector 62, the second bag-type dust collector 63 and the third bag-type dust collector 64 through pipelines, the center of the first air outlet 6112, the, The center of the first back flushing port 6115 and the center of the left end face of the valve body 611 are collinear, the distance from the center of the first back flushing port 6115 to the center of the left end face of the valve body 611 is less than the distance from the center of the first air outlet 6112 to the center of the left end face of the valve body 611, the 8-shaped rotary cover 612 is arranged inside the valve body 611, the 8-shaped rotary cover 612 is provided with a large end cover 6121 and a small end cover 6122, the large end cover 6121 and the small end cover 6122 are both circular, a communication port 61221 is arranged on the small end cover 6122, the large end cover 6121 and the left end face of the valve body 611 are coaxially arranged, the 8-shaped rotary cover 612 is driven by a stepping motor to rotate relative to the valve body 611, the center of the large end cover 6121, the center of the communication port 61221 and the center of the small end cover 6122 are collinear, the communication port 61221 is positioned between the large end cover 6121 and the small end cover 6122, the diameter of the large end cover 61, the diameter of the small end cover 6122 is greater than that of the first air outlet 6112, the distance from the center of the small end cover 6122 to the center of the left end face of the valve body 611 is equal to that of the first air outlet 6112, and the distance from the center of the communication port 61221 to the center of the left end face of the valve body 611 is equal to that of the first blowback port 6115.

In this embodiment, the steel balls enter the flue gas channel from the upper portion of the flue gas channel, and dust adhered to the inner wall of the flue gas channel falls off under the impact of the steel balls and then enters the separation box 111 along with the steel balls.

Referring to fig. 5 and 6, the lower end of the flexible connection 115 naturally falls, the lower end of the flexible connection 115 directly extends into the bottom of the container, the third link 118 is rotated, the first link 116 is pulled downward, the valve element 113 slides downward along the inner wall of the valve body 112, the valve element 113 reaches below the steel ball outlet 1121, the steel ball enters the steel ball outlet 1121, then enters the flexible connection 115 through the inclined flow tube 114, and then enters the container for containing the steel ball, and the steel ball output by the flexible connection 115 can be conveniently prevented from jumping out of the container for containing the steel ball.

Referring to fig. 5 and 6, when the third connecting rod 118 is not rotated by an external force, the second connecting rod 117 is rotated by the weight 119, the first connecting rod 116 is pushed upward, the valve element 113 slides upward along the inner wall of the valve body 112, and the valve element 113 blocks the ball outlet 1121.

And lifting the container containing the steel balls to the waste heat boiler 10, and pouring the steel balls into the flue gas channel of the waste heat boiler 10 for ash removal again.

The utility model discloses a be equipped with separator box 111 among the steel ball collection device 11, separator box 111 is last and after the mixture that multirow rack 1111 of crisscross setting down enabled dust and steel ball got into separator box 111, steel ball and dust random access clearance between rack 1111, because steel ball and dust random distribution between multirow rack 1111, this just enables steel ball and dust from the top abundant fraction open in whole separator box 111, be favorable to the dust to discharge from smoke outlet 1112 under negative-pressure air fan 50's effect, and the steel ball is because the relative dust of weight is big very much, get into valve body 112 under the effect of gravity, dust and steel ball can fully separate.

The utility model discloses in, after the high temperature flue gas that hot stove 40 in ore deposit produced got into burning furnace 20, carbon monoxide in the high temperature flue gas and the oxygen combustion in the air that comes from air inlet 213 produced carbon dioxide, reduced the gaseous emission of carbon monoxide, and exhaust-heat boiler 10 is sent into again to the heat that generates behind the gaseous combustion of carbon monoxide for chemical energy in the high temperature flue gas turns into heat energy, can make full use of.

The utility model discloses in, the high temperature flue gas pressure that the hot stove 40 in different ore deposit produced is different, and after the hot stove 40 in different ore deposit high temperature flue gas entering burns burning furnace 20, burns burning furnace 20 and has played the effect of buffer tank for it is even to burn the high temperature flue gas pressure in burning furnace 20, and the high temperature flue gas gets into exhaust-heat boiler 10 after burning 20 internal pressure stabilizations, makes exhaust-heat boiler 10 receive the hot side and is heated evenly, and exhaust-heat boiler 10 operating mode is stable.

The utility model discloses in, high temperature flue gas gets into from flue gas reposition of redundant personnel entry 211 and burns burning furnace 20, converge mouthful 212 outflow from the flue gas and burn burning furnace 20, because the furnace chamber that burns burning furnace 20 is the sphere, converge mouthful 212 from the gas reposition of redundant personnel inflow entrance to the flue gas and form a curved surface furnace chamber that roughly is toper, this furnace chamber smooth transition has reduced the vortex and the torrent ability that burn burning furnace 20 high temperature flue gas, the energy consumption of bleeding has been reduced, still improved the gas charging efficiency who burns in the burning furnace 20, carbon monoxide combustion efficiency has been improved.

The utility model discloses in, burn air inlet 213 and the flue gas reposition of redundant personnel entry 211 syntropy setting of burning furnace 20, burn carbon monoxide and the air syntropy flow in the burning furnace 20, increased the time of abundant contact.

In this embodiment, the rotating cover 612 is driven to rotate by the stepping motor, for example, the stepping motor drives the rotating cover 612 to rotate at a certain speed by 120 °, and then stops for a certain time, and then rotates at a certain speed by 120 °, and the process is repeated, initially, the small end cover 6122 of the rotating cover 612 covers the first air outlet 6112, the second air outlet 6113 and the third air outlet 6114 are not covered by the large end cover 6121, the large end cover 6121 covers the second back-blowing port 6116 and the third back-blowing port 6117, and the communication hole is communicated with the first back-blowing port 6115, in this case, the first bag dust collector 62 is in a back-blowing state, and the second bag dust collector 63 and the third bag dust collector 64 are in a dust removing state. With the rotation of the rotating cover 612, the first bag-type dust collector 62, the second bag-type dust collector 63 and the third bag-type dust collector 64 are alternately in a dust removing and back blowing state, so that the back blowing of the bag-type dust collectors is realized without stopping. The embodiment specifically provides a technical concept for realizing synchronous back flushing and dust removal of the bag-type dust collector.

The utility model discloses in disc change-over valve 61 that sets up can guarantee a sack cleaner 62, a sack cleaner in No. two sack cleaners 63, No. three sack cleaners 64 is in all the time and is in the blowback body, and is in the dust removal state all the time for two sack cleaners in addition to realize that the sack cleaner blowback does not shut down, avoided causing the interrupt of production because of the blowback.

Referring to fig. 1, further, the microsilica separator 30 includes a separation cylinder 31 and an air outlet pipe 32, an inner cavity of the separation cylinder 31 is a closed space, an upper section of the separation cylinder 31 is a cylinder, a lower section of the separation cylinder 31 is a cone, the upper portion of the separation cylinder 31 is provided with a left air inlet 311 and a right air inlet 312, the left air inlet 311 and the right air inlet 312 have the same structure, the left air inlet 311 and the right air inlet 312 are uniformly distributed along the annular wall of the separation cylinder 31, the left air inlet 311 and the right air inlet 312 are both vertically arranged, so that high-temperature flue gas enters the inner cavity of the upper section of the separation cylinder 31 in a reverse horizontal direction by a tangent line of the upper section of the separation cylinder 31, the air inlet directions of the left air inlet 311 and the right air inlet 312 are the same, the air outlet pipe 32 is installed at the top of the separation cylinder 31, the upper end of, the smoke outlet 1112 is connected to the left air inlet 311 and the right air inlet 312, and the upper end port of the air outlet pipe 32 is connected to the inlet of the negative pressure fan 50.

After entering the separation cylinder 31 from the tangential direction, the dusty flue gas spirally moves from top to bottom and left along the cylinder wall of the separation cylinder 31, the downward rotating air flow is an outer vortex, the outer vortex rotates upwards after reaching the bottom of the cone of the separation cylinder 31, the outer vortex rotates upwards along the axis of the separation cylinder 31 and is finally discharged through the air outlet pipe 32, and the upward rotating air flow is an inner vortex. The air current is at rotatory in-process, leans on the centrifugal force of the rotatory production of air current, throws large granule dust and area fire charcoal granule to the 31 section of thick bamboo walls of separation barrel, and the whereabouts separation under the effect of air current promotion and gravity, however, because the unilateral is admitted air and can be caused the air current of upwards rotation eccentric, and partial large granule dust and area fire charcoal granule can be brought into the interior vortex, lead to little silica flour quality to reduce, still can cause the drawing of follow-up sack cleaner to lose or burn.

In this embodiment, utilize little silica flour separator 30, can separate out the large granule dust in the flue gas and the charcoal granule of taking the fire, can prevent that the big granule dust from marking and damaging the sack cleaner, can prevent to take the charcoal granule of fire to burn out and damage the sack cleaner.

In this embodiment, the silica fume separator 30 is used to effectively concentrate silica fume in the smoke and dust, and separate other impurity particles mixed with the silica fume, thereby improving the quality of the silica fume.

In this embodiment, the left air inlet 311 and the right air inlet 312 are adopted to synchronously intake air, and the left air inlet 311 and the right air inlet 312 are symmetrical about the center of the cross section circle of the separation cylinder 31, so that the problem of eccentricity of the air flow which rotates upwards is avoided, part of large-particle dust and fire-carrying carbon particles are prevented from being brought into the inner vortex, the quality reduction of the micro silicon powder is improved, and the problem of scratching or burning of the bag-type dust collector is also avoided.

Referring to fig. 1, further, the ratio of the pipe diameter of the air outlet pipe 32 to the pipe diameter of the upper section of the separation cylinder 31 is 2, the ratio of the height of the left air inlet 311 to the width of the left air inlet 311 is 2, and the ratio of the height of the separation cylinder 31 to the height of the lower section of the separation cylinder 31 is 2.

The ratio of the pipe diameter of the outlet pipe 32 to the pipe diameter of the upper section of the separation cylinder 31 in this embodiment reduces the mutual interference between the inlet air of the separation cylinder 31 and the inner vortex, reduces the rebound and back-mixing phenomena of large-particle dust and fired carbon particles, improves the quality of the micro silicon powder, increases the outer vortex area, increases the centrifugal field, and improves the separation effect.

The ratio of the height of the left air inlet 311 to the width of the left air inlet 311 in this embodiment can reduce the pitch of the rotating airflow, so that the effective rotation in the separation cylinder 31 can be increased, the retention time is increased, and large particles of dust and charcoal particles with fire can be separated out more easily.

The ratio of the height value of the separation cylinder 31 to the height value of the lower section of the separation cylinder 31 in this embodiment is that the height value of the separation cylinder 31 is increased, the average residence time of the soot centrifugal field entering the separation cylinder 31 is increased, the separation is easier, and the height of the cone part of the lower section of the separation cylinder 31 is increased, so that the time required for the particles on the lower section of the separation cylinder 31 to be separated again is increased, and the separation efficiency is improved.

Referring to fig. 1, further, the exhaust-heat boiler 10 further includes a boiler top disposed at the top of the flue gas channel of the boiler, a steel ball scattering device 12 is disposed on the boiler top, the steel ball scattering device 12 includes a scattering and collecting hopper 121 and a steel ball scattering and guiding device 122, the steel ball scattering and guiding device 122 is disposed below the scattering and collecting hopper 121 and connected to an output port of the scattering and collecting hopper 121; the steel ball scattering guide 122 includes a cylindrical pipe 1221 and at least three dispersion pipes 1222; the upper end of a cylindrical pipeline 1221 is communicated with an output port of the scattering and collecting hopper 121, the lower end of the cylindrical pipeline 1221 is communicated with one end of each dispersing pipe 1222, and the other ends of the three dispersing pipes 1222 are connected with the top of the boiler and communicated with a flue gas channel of the boiler so as to uniformly scatter steel balls on the heating surface of the boiler.

Referring to fig. 1, further, the exhaust-heat boiler 10 further includes a circulating steel ball conveying device 13, the circulating steel ball conveying device 13 includes a driving gear 131, three driven gears 132, a double-row chain 133, a steel ball transporting hopper 134, a horizontal correcting rod 135, a reverse rotating wheel 136, the driving gear 131 and the three driven gears 132 are sequentially arranged at four corners of the supporting frame, the double-row chain 133 is sequentially wound around the driving gear 131 and the three driven gears 132 to form a closed rectangular chain ring, a steel ball transporting hopper 134 is hung between two chains of the double-row chain 133, the steel ball transporting hopper 134 can rotate around its rotation center in a vertical plane relative to the double-row chain 133, a plurality of steel ball transporting hoppers 134 are uniformly distributed along the rectangular chain ring, the gravity center of the steel ball transporting hopper 134 is deviated to one side of its rotation center to make the steel ball transporting hopper 134 restore its open end upward state, the horizontal correction rod 135 and the reverse turning wheel 136 are both fixedly arranged on the supporting frame, the horizontal correction rod 135 is positioned above the horizontal section below the annular lower part of the rectangular chain, the horizontal correction rod 135 is horizontally arranged along the length direction of the horizontal section below the annular lower part of the rectangular chain, two ends of the horizontal correction rod 135 are bent upwards so as to enable the end surface of the open end of the steel ball conveying hopper 134 on the horizontal section below the annular lower part of the rectangular chain to be clung to the lower part of the horizontal correction rod 135 to move horizontally, a stirring part 1341 is arranged on the steel ball conveying hopper 134, the steel ball conveying hopper 134 on the horizontal section below the annular lower part of the rectangular chain runs rightwards, the stirring part 1341 stirs the free end of the third connecting rod 118 to rotate around the second rotating shaft 1181 so as to enable steel balls in the valve body 112 to fall down from the steel ball outlet 1121 and enter the steel ball conveying hopper 134 through the inclined flow pipe 114 and the soft connection 115 in sequence, the, the top of the inversion wheel 136 is higher than the bottom of the ball transporting hopper 134 to block the ball transporting hopper 134 from moving leftward so that the ball transporting hopper 134 rotates about its rotational center with respect to the double row chain 133 to dump the balls in the ball transporting hopper 134 into the scattering collecting hopper 121, and the bottom of the ball transporting hopper 134 in the 90 ° inverted state is higher than the top of the inversion wheel 136 so that the ball transporting hopper 134 moves leftward.

The embodiment of the utility model provides a module or unit in the device can merge, divide and delete according to actual need.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (5)

1. The utility model provides a mine hot stove flue gas silica fume recovery system does not shut down which characterized in that: the waste heat boiler comprises a boiler heating surface formed by a serpentine pipe group, a boiler smoke channel formed with a sealed channel around the boiler heating surface, and a synchronous back-blowing dust removal device, wherein the boiler is provided with a closed hemispherical furnace body, the left end surface of the furnace body is a circular plane, a plurality of smoke diversion inlets are uniformly distributed on the left end surface, each smoke diversion inlet is connected corresponding to a high-temperature smoke discharge port of an ore-smelting furnace, the right end surface opposite to the left end surface is a hemispherical surface, the center of the right end surface is provided with a smoke collection port, the smoke collection port is connected with an upper end inlet of a smoke channel of the waste heat boiler, the left end surface of the furnace body is also provided with an air inlet, so that carbon monoxide in the high-temperature smoke entering the furnace body and oxygen in the air are combusted to generate carbon dioxide, and heat released by the combustion of the carbon monoxide is conveyed to the waste heat boiler, and the waste heat boiler comprises, The boiler comprises a boiler flue gas channel, a boiler bottom, a steel ball collecting device, a separating box, a valve body, a valve core, an inclined flow pipe, a flexible connection, a first connecting rod, a second connecting rod, a third connecting rod and a balancing weight, wherein the boiler bottom is provided with the steel ball collecting device, the steel ball collecting device comprises a separating box, a valve body, a valve core, the inclined flow pipe, the flexible connection, the first connecting rod, the second connecting rod, the third connecting rod and the balancing weight, the upper end and the lower end of the separating box are opened, the upper end and the lower end of the separating box are connected, the upper end and the lower end of the separating box are opened, the racks between the two adjacent rows are arranged in a staggered mode, one side of the separating box is provided with a smoke outlet, a screen is arranged on the smoke outlet, the screen mesh is arranged, the outlet of the oblique flow pipe is connected with the inlet of the flexible connection, the outer side wall of the valve core is connected with the inner side wall of the valve body in a sealing manner, the valve core can linearly move up and down along the side wall of the valve body, the top wall of the valve core is obliquely designed, the top wall of the valve core extends towards one side of the steel ball outlet, the first rotating shaft and the second rotating shaft are fixed at the bottom of the furnace, the upper end of the first connecting rod is hinged with the valve core, the left end of the second connecting rod is hinged with the middle end of the first connecting rod, the right end of the second connecting rod is provided with a balancing weight, the middle end of the second connecting rod is rotatably connected with the first rotating shaft, the upper end of the third connecting rod is hinged with the lower end of the first connecting rod, the lower end of the third connecting rod is a free end, the middle end of the third connecting rod is rotatably connected with the second rotating shaft, First sack cleaner, No. two sack cleaners, No. three sack cleaners, the disc change-over valve includes a cylindrical valve body and a 8 font rotary cover, the valve body cavity, the circular terminal surface in right side of valve body is equipped with a total air intake, total air intake and negative-pressure air fan's exit linkage, the circular terminal surface in left side of valve body is equipped with an air outlet, No. two air outlets, No. three air outlets, an air outlet, No. two air outlets, No. three air outlets are the same with No. three air outlet diameters, an air outlet, No. two air outlets, No. three air outlets are with left side terminal surface centre of a circle equipartition, an air outlet, No. two air outlets, No. three air outlets are connected with the flue gas inlet of a sack cleaner, No. two sack cleaners, No. three sack cleaners through the pipeline respectively, the circular terminal surface in left side of valve body still is equipped with a back, The diameters of a second back blowing port and a third back blowing port are the same, the first back blowing port, the second back blowing port and the third back blowing port are uniformly distributed in the center of a circle of a left side end face, the first back blowing port, the second back blowing port and the third back blowing port are respectively connected with an air inlet of a bag-type dust collector, a bag-type dust collector and a bag-type dust collector through pipelines to be connected with a back blowing air inlet, a first air outlet center, a first back blowing port center and the center of the left side end face of the valve body are collinear, the distance from the first back blowing port center to the center of the left side end face of the valve body is smaller than that from the first air outlet center to the center of the left side end face of the valve body, the 8-shaped rotary cover is internally arranged in the valve body and is provided with a large end cover and a small end cover which are both circular, a communicating port is arranged on the, the valve body is rotated relatively, the center of the large end cover, the center of the communicating port and the center of the small end cover are collinear, the communicating port is positioned between the large end cover and the small end cover, the diameter of the large end cover is larger than the distance from the center of the back flushing port to the center of the left end face of the valve body, the diameter of the large end cover is smaller than the distance from the center of the air outlet to the center of the left end face of the valve body, the diameter of the small end cover is larger than the diameter of the air outlet, the distance from the center of the small end cover to the center of the left end face of the valve body is equal to the distance from the center of the left end face of the air outlet to the.

2. The system for recovering the micro-silicon powder in the flue gas of the non-stop submerged arc furnace according to claim 1, which is characterized in that: the micro silicon powder separator comprises a separation barrel and an air outlet pipe, the inner cavity of the separation barrel is a closed space, the upper section of the separation barrel is a cylinder, the lower section of the separation barrel is a cone, the upper part of the separation barrel is provided with a left air inlet and a right air inlet, the left air inlet and the right air inlet are identical in structure, the left air inlet and the right air inlet are uniformly distributed along the annular wall of the separation barrel, the left air inlet and the right air inlet are both vertically arranged so that high-temperature flue gas reversely and horizontally enters the inner cavity of the upper section of the separation barrel by a tangent line of the upper section of the separation barrel, the air inlet directions of the left air inlet and the right air inlet are identical, the air outlet pipe is installed at the top of the separation barrel, the upper end of the air outlet pipe is exposed out of the separation barrel, the lower end of the air outlet, and the upper end port of the air outlet pipe is connected with an inlet of the negative pressure fan.

3. The system for recovering the micro-silicon powder in the flue gas of the non-stop submerged arc furnace according to claim 2, wherein: the ratio of the pipe diameter of the air outlet pipe to the pipe diameter of the upper section of the separation cylinder is 2, the ratio of the height value of the left air inlet to the width value of the left air inlet is 2, and the ratio of the height value of the separation cylinder to the height value of the lower section of the separation cylinder is 2.

4. The system for recovering the micro-silicon powder in the flue gas of the non-stop submerged arc furnace according to claim 1, which is characterized in that: the waste heat boiler also comprises a boiler top arranged at the top of the boiler flue gas channel, a steel ball scattering device is arranged at the boiler top, the steel ball scattering device comprises a scattering and collecting hopper and a steel ball scattering and guiding device, and the steel ball scattering and guiding device is arranged below the scattering and collecting hopper and is connected with an output port of the scattering and collecting hopper; the steel ball scattering guide device comprises a cylindrical pipeline and at least three dispersion pipes; the upper end of the cylindrical pipeline is communicated with an output port of the scattering and collecting hopper, the lower end of the cylindrical pipeline is communicated with one end of each dispersion pipe, and the other ends of the three dispersion pipes are connected with the top of the boiler and communicated with a flue gas channel of the boiler so as to uniformly scatter the steel balls on the heated surface of the boiler.

5. The system for recovering the micro-silicon powder in the flue gas of the non-stop submerged arc furnace according to claim 4, wherein: the waste heat boiler also comprises a circulating type steel ball conveying device, the circulating type steel ball conveying device comprises a driving gear, three driven gears, double rows of chains, a steel ball conveying hopper, a horizontal correcting rod and a reverse rotating wheel, the driving gear and the three driven gears are sequentially arranged at four corners of the supporting frame, the double rows of chains are sequentially wound on the driving gear and the three driven gears to form a closed rectangular chain ring, the steel ball conveying hopper is hung between two chains of the double rows of chains, the steel ball conveying hopper can rotate around the rotating center of the steel ball conveying hopper in a vertical plane relatively, the steel ball conveying hoppers are uniformly distributed along the rectangular chain ring, the gravity center of the steel ball conveying hopper deviates to one side of the rotating center of the steel ball conveying hopper, so that the steel ball hopper conveying hopper can restore the state that the opening end of the steel ball hopper faces upwards by virtue of the gravity, the horizontal correcting rod and the reverse rotating wheel are fixedly arranged on, the horizontal correcting rod is horizontally arranged along the length direction of the horizontal section below the annular part of the rectangular chain, two ends of the horizontal correcting rod are bent upwards to enable the end surface of the opening end of the steel ball conveying hopper on the horizontal section below the annular part of the rectangular chain to be tightly attached to the lower part of the horizontal correcting rod to move horizontally, a stirring part is arranged on the steel ball conveying hopper, the steel ball conveying hopper on the horizontal section below the annular part of the rectangular chain moves rightwards, the stirring part stirs the free end of the third connecting rod to rotate around a second rotating shaft, so that steel balls in the valve body fall from a steel ball outlet and enter the steel ball conveying hopper through an inclined flow pipe and a flexible connection in sequence, the reversing wheel is positioned below the horizontal section above the annular part of the rectangular chain, the steel ball conveying hopper on the horizontal section above the annular part of the rectangular chain moves leftwards, the top of the reversing wheel is higher than the bottom of the steel ball hopper to block the steel ball conveying, so that the steel balls in the steel ball conveying hopper are poured into the spreading and collecting hopper, and the bottom of the steel ball conveying hopper in a 90-degree reverse rotation state is higher than the top of the reverse rotation wheel, so that the steel ball conveying hopper runs leftwards.

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