CN211120693U - Flue gas treatment integrated system for ferroalloy submerged arc furnace - Google Patents

Abstract

The utility model discloses an integrated system is administered to hot stove flue gas in ferroalloy ore deposit, including the flue gas cooling device that connects gradually, high-efficient preprocessing device, the dust remover device, high energy ion bombardment device, flue gas washing device and flue gas whitening heating eduction gear, wherein hot stove flue gas in ferroalloy ore deposit cools off through flue gas cooling device, carry out the preliminary treatment through high-efficient preprocessing device after the cooling, flue gas after the preliminary treatment gets into the dust remover device and removes dust, flue gas after the dust removal gets into high energy ion bombardment and bombards, flue gas after the bombardment gets into flue gas washing device, flue gas that the washing was accomplished gets into flue gas whitening heating eduction gear, finally get out through flue gas whitening heating eduction gear; the utility model discloses effectively solved the hot stove flue gas of ferroalloy ore deposit and administered a difficult problem (if denitration, desulfurization, ultralow emission), can realize retrieving the product simultaneously to make its resourceization, have environmental benefit and social moreover, can reduce the pollution of industrial waste gas to the environment.

Description

Flue gas treatment integrated system for ferroalloy submerged arc furnace

Technical Field

The utility model relates to a flue gas treatment facility, specifically say an integrated system is administered to hot stove flue gas in ferroalloy ore deposit.

Background

Ferroalloys are one of the essential important raw materials for the steel industry and the machinery industry. With the continuous development of the steel industry in China, the increase of steel grades and the improvement of steel quality correspondingly put forward higher demands on the production of ferroalloy. Ferroalloy production technology is increasingly becoming the relevant technology and supporting engineering of the steel industry.

The industrial production of the ferroalloy in China in the new century is rapidly developed, the product not only meets self-sufficiency, but also is exported to the international market, the rapid development of the ferroalloy promotes the environmental protection project of the flue gas treatment of the ferroalloy submerged arc furnace.

A large amount of waste gas, sewage and slag discharged in the ferroalloy production process are not negligible in pollution to the environment, countries in the world pay more attention to environmental protection, environmental management is increasingly strict, new control technology is adopted for pollutants discharged in the ferroalloy production, and three-free production, namely no atmospheric pollution, no sewage discharge and no waste slag (namely, slag full utilization), is realized in the developed countries in the last 70 th century.

The development of pollution control technology in the ferroalloy industry is closely related to the technological progress of ferroalloy processes and equipment. The iron alloy industry is more and more clearly informed of the consensus that the survival and development of enterprises in the fierce market competition at home and abroad are critical to continuously updating or improving the technology, equipment and management level along with the development of production.

The three wastes in the ferroalloy industry are generated, and the main generation sources of the waste gas of ferroalloy plants are various furnaces including a reduction (ore-smelting) electric furnace, a refining electric furnace, a roasting rotary kiln, a multi-layer roasting furnace, a metallothermic process smelting furnace and the like.

The reducing electric furnace (ore furnace) is a device for smelting most of ferroalloy product varieties, and the main raw materials of the reducing electric furnace are ore and reducing agent. After the raw materials are put into the furnace, the raw materials are subjected to reduction reaction at high temperature of a molten pool to generate high-temperature dust-containing combustible gas of CO, CH4 and H2, which is called furnace gas, the high-temperature dust-containing combustible gas penetrates through the material layer to be dissipated on the surface of the material layer, and when the high-temperature dust-containing combustible gas contacts air, CO is combusted to form high-temperature dust-containing flue gas. The furnace gas generation amount of each ton of finished alloy fluctuates between 700 and 2000m3 (standard state) according to different products. The temperature of furnace gas is about 600 ℃.

Along with the high-speed development of ferroalloy, flue gas treatment of the ferroalloy submerged arc furnace also promotes a positive pressure large-bag dust remover as a smoke pollution control device of the submerged arc furnace.

The positive pressure big bag dust collector is characterized in that a fan is arranged in front of the bag dust collector, and the bag dust collector works in a positive pressure state. The dusty gas passes through the fan firstly, so that the fan is seriously abraded, and the dust-free dust remover is not suitable for dust with high concentration, coarse particles, high hardness and strong corrosivity. The positive pressure large bag type dust remover is mainly suitable for removing the flue gas of a silicon ore heating furnace.

The development of the positive pressure large bag-type dust collector is related to the boosting of iron alloy smelting enterprises in China, and the positive pressure large bag-type dust collector is low in manufacturing cost, convenient to manage and popular with many enterprises. The early positive-pressure large bag-type dust collector belongs to an unorganized emission type, the unorganized emission type causes difficulty in monitoring, and enterprises are difficult to achieve environment-friendly emission standards under the current environment-friendly high pressure. Therefore, a non-sealed type monitorable positive pressure large bag-type dust collector is produced. The edge-wiping ball capable of being monitored in an environment-friendly manner is actually beaten by the monitoring type positive-pressure large-bag dust collector, and the intelligent injury of environment-friendly supervision is neglected.

Environmental pollution of ferroalloy

In recent years, as the environmental pollution problem has become more serious, the environmental protection problem has come to be highly regarded by the society. Related national departments develop various policies in the fields of atmosphere, sewage, solid waste and the like in succession, and assist related working depths.

And immediately commanding the production stopping treatment to the sewage disposal unit which has one of the conditions that the sewage disposal unit can not stably reach the standard, adopts single simple equipment which does not meet the requirements of related national or local regulations, or has low production efficiency of waste gas collection and terminal treatment, does not implement detection and repair (L DAR) or has unqualified evaluation results, and the like.

SO as a key precursor of PM2.5 and ozone₂、NOx、The PM2.5 emission amount still shows an increasing trend, and becomes a key point and a difficult point of air pollution prevention and control in China.

Problems with atmospheric pollution control:

first, the source control is inadequate. The low content raw paving material source head substitution measure is obviously insufficient.

Second, the problem of unorganized drainage is significant. Enterprises with large quantity and wide range do not take effective control measures, and particularly small and medium-sized enterprises have poor management level, low collection efficiency and outstanding dissipation problems.

Thirdly, the treatment facility is simple and low in efficiency. The construction quality of the pollution control facilities is good and uneven, and the phenomena of treatment, ineffective treatment and the like are prominent.

Fourth, the operation management is not normative.

Enterprises generally have the phenomena of incomplete management system, non-established operating rules, insufficient personnel technical ability and the like. Fifthly, monitoring is not in place. The self-monitoring quality of enterprises is not high generally. Some key enterprises are not equipped with automatic monitoring facilities according to requirements. Industrial parks and clusters lack effective monitoring devices and early warning measures.

The simple color steel shed type positive pressure big bag-type dust collector system cannot meet the current environmental protection requirement, and causes serious atmospheric pollution. Under the current environmental protection high pressure, many industries face severe tests, and enterprises place environmental protection at important positions. The technologies and experiences of various enterprises are different, and the improvement of the technology and the management level of the environment-friendly equipment is urgently needed.

The environmental protection pressure of the prior ferroalloy production is that the smoke pollution control of the submerged arc furnace is basically controlled; but the pollution of the flue gas is difficult to control, such as low concentration and large air volume SO₂NOx, and in particular NOx, are difficult to remove.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to overcome the above-mentioned not enough, the utility model provides a hot stove flue gas of iron alloy ore deposit administers integrated system is effectively solved to hot stove flue gas of iron alloy ore deposit administers a difficult problem (if denitration, desulfurization, ultralow emission) here, the utility model discloses can realize retrieving the product to make its resourceization, have environmental benefit and social moreover, can reduce the pollution of industrial waste gas to the environment.

The utility model is realized in such a way that an integrated system for treating flue gas of the ferroalloy submerged arc furnace is constructed, which comprises a flue gas cooling device, a high-efficiency pretreatment device, a dust remover device, a high-energy ion bombardment device, a flue gas washing device and a flue gas whitening heating discharge device which are connected in sequence,

the flue gas of the ferroalloy submerged arc furnace is cooled by a flue gas cooling device, and then is pretreated by a high-efficiency pretreatment device, the pretreated flue gas enters a dust remover device for dust removal, the flue gas after dust removal enters high-energy ion bombardment for bombardment, the flue gas after bombardment enters a flue gas washing device, the washed flue gas enters a flue gas whitening heating discharge device, and finally the flue gas is discharged by the flue gas whitening heating discharge device.

Preferably, the flue gas cooling device comprises an indirect row air cooler, the inlet of the indirect row air cooler is the inlet of the flue gas of the ferroalloy submerged arc furnace, and the outlet of the indirect row air cooler is connected with the high-efficiency pretreatment device.

Preferably, the high-efficiency preprocessor adopts a parallel high-flow high-efficiency preprocessor, the preprocessor comprises a parallel high-flow spiral shell and a diffusion cyclone dust collector, the parallel high-flow spiral shell comprises two spirals which are symmetrically arranged and have inlets connected in parallel, cylindrical shutter fixed blades are installed in the spirals, the spirals are opened at the upper and lower parts, the aperture of the upper opening is larger than that of the lower opening, the upper opening is connected with an outlet of the diffusion cyclone dust collector, and the lower opening is connected with a purified gas discharge pipe;

meanwhile, the spiral side surface is respectively provided with a dust-containing gas inlet and a concentration and diversion port, wherein the aperture of the dust-containing gas inlet is larger than that of the concentration and diversion port, the dust-containing gas inlet is connected with a dust-containing gas inlet pipe through a dust-containing gas inlet square-circle joint, the concentration and diversion port is connected with an inlet of a diffusion cyclone dust collector, and the dust-containing gas inlet pipe is connected with an outlet of a flue gas cooling device;

the outlet of the collected discharge pipe is connected with a positive pressure fan through flexible connection, and the positive pressure fan conveys the flue gas at the pretreated rear end to a dust remover device;

meanwhile, a dust storage pit matched with the diffusion cyclone dust collector is arranged on the working site.

Preferably, the dust collector device comprises a base support formed by a plurality of lower upright post steel frames, a plurality of duplex chamber ash bucket assemblies are fixedly arranged at the upper end of the base support, filter bag chambers are arranged above the duplex chamber ash bucket assemblies, large bag filter bags are arranged in the filter bag chambers through fixedly arranged filter bag hanging steel frames, the upper ends of the filter bag chambers are collected in a concentrated discharge air collecting pipe, and the concentrated discharge air collecting pipe is connected with a chimney; the chimney is connected with the high-energy ion bombardment device;

the duplex chamber-separating ash bucket assembly is provided with an air inlet rectangular opening, a filter bag fixing pipe opening and a square ash discharge opening, wherein the air inlet rectangular opening is connected with a flue gas chamber-separating ash bucket inclined rectangular pipe through a flue gas chamber-separating ash bucket transverse rectangular pipe, and the flue gas chamber-separating ash bucket inclined rectangular pipe is connected with a positive pressure fan; the filter bag fixing pipe orifice is positioned below the filter bag chamber;

the horizontal rectangular pipe of the flue gas inlet chamber ash hopper is connected with a high-efficiency preprocessor through a double-inlet double-support main fan, and the horizontal rectangular pipe of the flue gas inlet chamber ash hopper is provided with a tapping induced draft fan and a back suction ash removal and conveying fan;

the ash discharge port is positioned below and provided with a rectangular ash conveying pipe, the ash discharge ports of the duplex chamber ash buckets are connected with the encryption bin after being collected, the encryption bin is connected with the diffusion cyclone dust collector, and the clean air outlet of the diffusion cyclone dust collector is collected in the high-energy ion bombardment device.

Preferably, the high-energy ion bombardment device comprises a rectangular flue, an inlet reducer and an outlet reducer are respectively installed at an inlet and an outlet of the rectangular flue, a catalytic bombardment unit is installed in the rectangular flue and connected with a power supply, untreated flue gas enters the rectangular flue through the inlet reducer and is discharged from the outlet reducer after being treated by the catalytic bombardment unit, the inlet reducer of the flue is connected with the dust remover device, and the outlet reducer is connected with the flue gas washing device.

Preferably, the flue gas washing device comprises a water-spinning hydraulic flue gas washing tower, the washing tower comprises an absorption reaction tower, a circulating water tank and an evacuation chimney, the absorption reaction tower and the evacuation chimney are arranged above the circulating water tank in parallel,

the upper end of the absorption reaction tower is provided with a gas-liquid distribution chamber, the middle section is an oxidation catalysis section, the lower end is provided with pall ring packing, the upper end of the gas-liquid distribution chamber is provided with a flue gas inlet diffusion cover, the upper end of the flue gas inlet diffusion cover is connected with a flue gas inlet vertical pipe with a downward opening through a flue gas inlet elbow,

the lower part of the gas-liquid distribution chamber is provided with a separation flower plate, a separation ring is arranged in the middle of the separation flower plate, a plurality of partition plates are uniformly distributed on the periphery of the separation ring along the radial direction, the partition plates divide the separation flower plate into a plurality of same nozzle areas in equal parts, a plurality of broken line cup-shaped nozzles installed on the separation flower plate are arranged in the areas, meanwhile, the nozzle areas are provided with circulating liquid branch pipe distribution pipes, the circulating liquid branch pipe distribution pipes are connected with an annular circulating liquid branch main pipe fixedly installed on the periphery of the gas-liquid distribution chamber, and the annular circulating liquid branch main pipe is connected with a circulating liquid water pump through a circulating liquid vertical pipe;

the flue gas inlet vertical pipe is connected with a high-energy ion bombardment device,

the evacuation chimney is connected with the demisting dehydration box, and the demisting dehydration box is connected with the flue gas de-whitening heating discharge device.

Preferably, the flue gas de-whitening heating and discharging device comprises a desulfurization and denitrification draught fan, an emptying chimney and a chimney flue gas de-whitening heater, wherein the inlet of the desulfurization and denitrification draught fan is connected with the defogging and dewatering box, the outlet of the desulfurization and denitrification draught fan is connected with the emptying chimney, the chimney flue gas de-whitening heater is installed on the emptying chimney, and a monitoring platform is installed on the emptying chimney.

The utility model discloses following beneficial effect has:

⒈ the utility model adopts the design of integrated system device with multiple removal schemes, effectively solves the problem of flue gas pollution of the ferroalloy submerged arc furnace, and skillfully combines multiple removal according to the mechanical characteristics and the bag dust removal mechanism based on the wind tunnel mechanism, the structure science and the requirement of operation safety, thereby realizing ultralow standard emission of the ferroalloy submerged arc furnace.

⒉ the kinetic energy of the hot smoke is used to heat the purified smoke and reduce the white smoke, which is mainly shown in the middle of the chimney that adopts heat pipe technology to heat and discharge the smoke reaching the standard.

⒊ the blower of the positive pressure big bag dust collector is treated with abrasion resistance correctly, and the adopted method is that the preprocessor in front of the blower must be a high-efficiency dust removing device.

⒋ the high-efficiency preprocessor can effectively control the abrasion of the main fan, simultaneously improve the service life of the filter bag, improve the quality of the byproduct micro silicon powder and increase the economic benefit.

Drawings

FIG. 1 is a schematic view of the whole of the present invention

FIG. 2 is a schematic diagram of the arrangement of air cooling pipes of the indirect row air cooler of the present invention;

FIG. 3 is a side view of the indirect row air cooler of the present invention;

FIG. 4 is a top view of the state of FIG. 2;

FIG. 5 is a schematic diagram of an efficient preprocessor architecture;

FIG. 6 is a schematic sectional view from the perspective A-A in FIG. 5;

FIG. 7 is a schematic view of the installation of a purified gas discharge pipe of the high-efficiency preprocessor and a parallel high-flow spiral shell;

FIG. 8 is a partial split schematic diagram of an efficient preprocessor;

FIG. 9 is a schematic view of the construction of the duster device;

FIG. 10 is a cross-sectional view B-B of FIG. 9;

FIG. 11 is a cross-sectional view A-A of FIG. 9;

FIG. 12 is a front view of the collective exhaust air collection duct of the duster assembly;

FIG. 13 is a side view of the collective exhaust air collection duct of the present precipitator apparatus;

FIG. 14 is a schematic view of the structure of the high-energy ion bombardment apparatus;

FIG. 15 is a schematic view of a vacuum high energy electron tube configuration of the high energy ion bombardment means;

FIG. 16 is a left side view of a vacuum high energy electron tube of the high energy ion bombardment means;

FIG. 17 is a schematic view of a vacuum high energy electron tube unit of the high energy ion bombardment apparatus;

FIG. 18 is a schematic circuit diagram of the power supply of the high energy ion bombardment means;

FIG. 19 is an enlarged partial schematic view of M of FIG. 15;

FIG. 20 is a schematic view of a flue gas scrubbing apparatus

FIG. 21 is a schematic top view of a flue gas scrubbing apparatus;

FIG. 22 is a schematic sectional view of a broken-line cup-shaped nozzle installed in a reaction tower of a flue gas scrubbing apparatus;

FIG. 23 is a schematic cross-sectional view of an oxidation catalyst section of a reaction tower of a flue gas scrubbing apparatus;

FIG. 24 is a schematic cross-sectional view of a circulating water tank of the flue gas scrubbing apparatus;

FIG. 25 is a cross-sectional view A-A of FIG. 24;

FIG. 26 is a schematic view of a divided faceplate of the flue gas scrubbing apparatus;

FIG. 27 is a sectional perspective view of a divided faceplate of the flue gas scrubbing apparatus;

figure 28 is a perspective view of a flue gas scrubbing apparatus broken line cup-type nozzle.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 28, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, the utility model provides an integrated system for treating flue gas of a ferroalloy submerged arc furnace, which comprises a flue gas cooling device, a high-efficiency pretreatment device, a dust remover device, a high-energy ion bombardment device 9, a flue gas washing device and a flue gas whitening heating discharge device which are connected in sequence,

the flue gas of the ferroalloy submerged arc furnace is cooled by a flue gas cooling device, and then is pretreated by a high-efficiency pretreatment device, the pretreated flue gas enters a dust remover device for dust removal, the flue gas after dust removal enters high-energy ion bombardment for bombardment, the flue gas after bombardment enters a flue gas washing device, the washed flue gas enters a flue gas whitening heating discharge device, and finally the flue gas is discharged by the flue gas whitening heating discharge device.

As shown in fig. 2-4, in the present embodiment, the flue gas cooling device includes an indirect-type train air cooler 1, which includes a plurality of air cooling pipes 1.1 connected to each other in a ring shape and a bracket 1.4 supporting the plurality of air cooling pipes; the inlet 1.3 of the indirect row air cooler is an inlet 1.2 of the flue gas of the ferroalloy submerged arc furnace, and the outlet of the indirect row air cooler is connected with the high-efficiency pretreatment device.

In the present embodiment, as shown in fig. 5-8, the high efficiency pre-processor adopts a parallel high flow rate high efficiency pre-processor 2.2, which includes a parallel high flow rate volute casing 2.1 and a diffusion cyclone 2.3, the parallel high flow rate volute casing includes two volutes that are symmetrically arranged and have inlets in parallel, and cylindrical louver fixed blades 2.2 are installed in the volutes, the volutes have upper and lower openings, wherein the aperture of the upper opening is larger than that of the lower opening, the upper opening is connected with the outlet of the diffusion cyclone 2.3, and the lower opening is connected with a purified gas discharge pipe 2.6;

meanwhile, the side surface of the spiral is respectively provided with a dust-containing gas inlet and a concentration branch outlet 2.4, wherein the aperture of the dust-containing gas inlet is larger than that of the concentration branch outlet, the dust-containing gas inlet is connected with a dust-containing gas inlet pipe 2.10 through a dust-containing gas inlet square round joint 2.9, the concentration branch outlet is connected with an inlet of a diffusion cyclone dust collector 2.3,

the outlet of the discharge pipe 2.6 is connected with a positive pressure fan 2.19 through a flexible connection 2.18 after being collected, and the positive pressure fan conveys the flue gas at the rear end of the pretreatment to the next procedure.

In this embodiment, the diffusion cyclone dust collector 2.3 comprises a shell and a diffusion cyclone dust collector core tube 2.11 positioned in the shell, the shell is sequentially provided with a diffusion cyclone inverted cone 2.12, a diffusion cyclone dust bin 2.14 and a diffusion cyclone 60-degree dust discharge cone 2.15 from top to bottom, a diffusion cyclone 60-degree reflecting screen cone 13 is arranged in the diffusion cyclone inverted cone 2.12, a high-temperature dust discharge valve 2.16 is arranged at the bottom of the diffusion cyclone 60-degree dust discharge cone 15, and a dust storage pit 16 matched with the high-temperature dust discharge valve 2.16 is arranged at the bottom of a working platform; the upper end of the diffusion cyclone dust collector core tube 2.11 extends out of the shell, the end part is a purification outlet, and the side surface of the upper part of the diffusion cyclone inverted cone 2.12 is provided with a gas inlet along the tangential direction.

In the present exemplary embodiment, the upper opening of the spiral is connected to the purge outlet of the diffusion cyclone 2.3 via a purge gas outlet elbow 2.7 and a purge gas outlet connection 2.8.

In this embodiment, the spiral concentrate tap 2.4 is connected to the gas inlet of the diffuser cyclone 2.3 via a concentrate and diffuser cyclone connection 2.5.

The dust-containing flue gas tangentially enters a parallel type high-flow spiral shell (a spiral case of an inertial separator) from a dust-containing gas inlet at a high flow speed (generally 18-25 m/s), strong rotary motion is formed in the spiral, dust particles are thrown to the outer edge of the spiral under the action of centrifugal force, and the dust particles are concentrated. The dust-laden flue gas (accounting for 10-20% of the total flue gas) with the dust particles concentrated enters a second-stage purification device (a diffusion cyclone dust collector) through a concentration branch opening; most of the flue gas (accounting for about 80-90% of the total flue gas) bypasses the fixed blades of the middle fixed cylindrical shutter and is discharged through the flue gas outlet. When the flue gas flows through the fixed blades of the cylindrical shutter, the direction of the gas flow needs to be changed, dust particles in the flue gas impact the blades due to the action of inertia force and are ejected out by counter force, the dust particles ejected out by the counter force rotate and accelerate along with the flue gas which newly enters the volute, and the dust particles are thrown to the outer edge of the volute under the action of centrifugal force. The purified flue gas is discharged from the flue gas outlet through the blade gap.

The working principle of the diffusion cyclone dust collector is as follows:

the dust-containing gas enters the barrel of the dust remover through the gas inlet along the tangential direction, dust is separated from the wall of the dust remover under the action of centrifugal force and rotates downwards along with the gas flow, most of the gas flow is reflected by the reflecting screen and rises upwards to be discharged through the exhaust pipe, a small part of the gas flow enters the ash bucket along with the dust through the annular gap between the reflecting screen and the cone, the speed of the gas entering the ash bucket is reduced, the dust falls into the ash bucket under the action of inertia and is discharged through the ash discharge valve, and the gas rises to the exhaust pipe through the air holes of the reflecting screen to be discharged.

As shown in fig. 9-11, in the present embodiment, the dust collector apparatus includes a base support composed of a plurality of lower column steel frames 3.1, a plurality of duplex chamber ash bucket assemblies 3.2 are fixedly installed at the upper end of the base support, filter bag chambers 3.3 are installed above the plurality of duplex chamber ash bucket assemblies 3.2, large bag filter bags 3.12 are installed in the filter bag chambers 3.3 through filter bag hanging steel frames 3.4, the upper ends of the plurality of filter bag chambers 3.3 are collected in a concentrated discharge air collection pipe 3.5, and the concentrated discharge air collection pipe 3.5 is connected with a chimney 3.6;

the duplex chamber ash bucket assembly 3.2 is provided with an air inlet rectangular opening, a filter bag fixing pipe opening and a square ash discharge opening, wherein the air inlet rectangular opening is connected with a flue gas inlet chamber ash bucket inclined rectangular pipe 3.7 through a flue gas inlet chamber ash bucket transverse rectangular pipe 3.11; the flue gas enters the horizontal rectangular pipe of branch room ash bucket and installs main fan 3.131 and deironing draught fan 3.15.

The horizontal rectangular pipe of the flue gas inlet chamber ash hopper is connected with a high-efficiency preprocessor through a double-inlet double-support main fan 3, and a tapping induced draft fan 4 and a reverse-suction ash-removing and ash-conveying fan 5 are arranged on the horizontal rectangular pipe of the flue gas inlet chamber ash hopper;

the filter bag fixing pipe orifice is positioned below the filter bag chamber 3.3;

the ash discharge port is positioned below and provided with a rectangular ash conveying pipe 3.9, and the rectangular ash conveying pipe 3.9 is connected with a reverse-suction ash removal fan 3.13.

In the embodiment, a back suction ash removal disc type lifting valve 3.10 is installed on the rectangular ash conveying pipe 3.9.

In this embodiment, the flue gas enters the horizontal rectangular pipe 3.11 of locellus ash bucket and installs flue gas and enters locellus ash bucket tray formula lift valve 3.8.

In the present exemplary embodiment, the bag chamber 3.3 is formed by a combination of square vertical tubes and fully sealed corrugated steel.

As shown in fig. 12-13, in this embodiment, a plurality of air-equalizing hole pipes 3.51 are arranged below the horizontal center line of the concentrated exhaust air-collecting pipe, the air-equalizing hole pipes are arranged in an inverted V shape of 120 °, and the number of the air-equalizing hole pipes is determined by the size of the dust collector.

In the present exemplary embodiment, a stack monitoring device 3.14 is provided on the stack 3.6, which device is used to detect the exhaust gas mass.

The method comprises the following steps that flue gas containing fine dust enters a positive-pressure large bag-type dust collector after being pressurized by a positive-pressure fan 3.15, then enters a chamber-divided ash hopper transverse rectangular pipe 3.11 through the flue gas, is distributed into a duplex chamber-divided ash hopper assembly 3.2 through a chamber-divided ash hopper rectangular pipe 3.7, and is distributed into a large bag-type filter bag 3.12 through a duplex chamber-divided ash hopper for filtering, the filtered flue gas is discharged into an upper layer of a fully-sealed corrugated steel shell filter bag chamber 3.3 for accumulation, and the purified flue gas is collected through a concentrated discharge and collection pipe 3.5 and discharged through a chimney by utilizing the kinetic energy of the purified hot flue gas; and the dust is output through a rectangular dust conveying pipe, so that the resource recovery is realized.

The ash discharge port is positioned below and provided with a rectangular ash conveying pipe, the ash discharge ports of the duplex chamber ash buckets are connected with the encryption bin 7 after being collected, the encryption bin is connected with the diffusion cyclone dust collector 8, and the clean air outlet of the diffusion cyclone dust collector is collected in the high-energy ion bombardment device.

As shown in fig. 14 to 19, in this embodiment, the high-energy ion bombardment device 9 includes a rectangular flue 9.1, an inlet reducer 9.21 and an outlet reducer 9.22 are respectively installed at an inlet and an outlet of the rectangular flue, a catalytic bombardment unit is installed in the rectangular flue, and the catalytic bombardment unit is connected to a power supply 9.5, wherein untreated flue gas enters the rectangular flue through the inlet reducer, and is treated by the catalytic bombardment unit and then connected to a flue gas washing device through the outlet reducer.

In this embodiment, the catalytic bombardment unit comprises a vacuum high-energy electron tube unit and a UV ultraviolet photolysis catalytic light tube unit, wherein the UV ultraviolet photolysis catalytic light tube unit is close to the outlet variable diameter section 9.22.

In this embodiment, the vacuum high energy electron tube unit comprises a plurality of vacuum high energy electron tubes 9.3 arranged in staggered rows and in parallel.

In this embodiment, the UV photolysis catalytic light tube unit includes a plurality of UV photolysis catalytic light tubes 9.4; the UV photolysis catalytic light tube 9.4 and the vacuum high-energy electron tube 9.3 are arranged in a mixed manner, namely a row of UV photolysis catalytic light tubes 9.4 and a row of vacuum high-energy electron tubes 9.3.

In this embodiment, the vacuum high-energy electron tube 9.3 is composed of an outer tube 9.31 and an inner tube 9.33 which are coaxial, a vacuum chamber is formed between the inner tube and the outer tube, the outer tube is a quartz tube, the inner tube is a tubular inner electrode tube, a channel is formed inside the inner tube, two ends of the quartz tube and two ends of the tubular inner electrode tube are respectively connected by a tube end seal 9.34 and a tube end tail seal 9.37, and an outer mesh-shaped outer electrode 9.32 is arranged on the periphery of the quartz tube;

the pipe end seal 9.34 is provided with an outer electrode leading-out hole 9.35 and an inner electrode leading-out hole 9.36, and the periphery of the pipe end seal is provided with a mounting hole, so that the pipe end seal is connected with the rectangular flue in a flange connection mode;

two electrodes of the power supply 9.5 penetrate into wires from the outer electrode leading-out hole 9.35 and the inner electrode leading-out hole 9.36 respectively to be connected with the reticular outer electrode and the tubular inner electrode tube.

In this embodiment, the flue gas washing device comprises a water-spinning hydraulic flue gas washing tower 10, an absorption reaction tower 10.5, a circulating water tank 10.20, and an evacuation chimney 10.15, wherein the absorption reaction tower 10.5 and the evacuation chimney 10.15 are arranged above the circulating water tank 10.20 in parallel,

the upper end of the absorption reaction tower 10.5 is a gas-liquid distribution chamber 10.4, the middle section is an oxidation catalysis section, the lower end is pall ring packing 10.12, the upper end of the gas-liquid distribution chamber 10.4 is provided with a flue gas inlet diffusion cover 10.3, the upper end of the flue gas inlet diffusion cover is connected with a flue gas inlet vertical pipe 10.1 with a downward opening through a 18-degree flue gas inlet elbow 10.2,

the lower part of the gas-liquid distribution chamber 10.4 is provided with a separation flower plate 10.6, the middle of the separation flower plate 10.6 is provided with a separation ring 10.42, a plurality of partition plates 10.41 are evenly distributed along the radial direction on the periphery of the separation ring, the partition plates equally divide the separation flower plate into a plurality of same nozzle areas, a plurality of broken line cup-shaped nozzles 10.7 arranged on the separation flower plate are arranged in the areas, meanwhile, the nozzle areas are provided with a circulating liquid distribution branch pipe water distribution pipe 10.11 which is connected with an annular circulating liquid distribution main pipe 10.10 fixedly arranged on the periphery of the gas-liquid distribution chamber 10.4, and the annular circulating liquid distribution main pipe is connected with a circulating liquid water pump 10.9 through a circulating liquid vertical pipe 10.8.

In this embodiment, the oxidation catalysis section is provided with a UV photolysis long tube 10.17 and a UV photolysis rectangular tube 10.18 which are arranged at intervals.

In this embodiment, the circulating water tank 10.20 comprises a liquid-gas separation chamber 10.19, an oxidation aeration tank 10.201, a vertical flow sedimentation tank 10.202, a water supplement tank 10.203 and a water collection tank 10.204, wherein the oxidation aeration tank 10.201 is communicated with the liquid-gas separation chamber 10.19, the liquid-gas separation chamber 10.19 is connected with two vertical flow sedimentation tanks 10.202 in series, the vertical flow sedimentation tank 10.202 is connected with the water supplement tank 10.203, and the oxidation aeration tank 10.201 is connected with the vertical flow sedimentation tank 10.202 through a pipeline,

the evacuation chimney 10.15 is arranged right above the liquid-gas separation chamber 10.19 through the purified flue gas outlet and gas collecting hood 10.14,

the absorption reaction tower 5 is arranged right above the oxidation aeration tank 10.201,

the water collection tank 10.204 supplies water to the circulating liquid water pump 10.9.

In this embodiment, an evacuation detection platform 10.16 is mounted on the evacuation chimney 10.15.

In this embodiment, the inlet of the upper end of the broken line cup type nozzle 10.7 is provided with a leveling ring 10.71, and the outlet is provided with a liquid crushing plate 10.72.

In the embodiment, a manhole 10.13 is arranged below the absorption reaction tower and is positioned between the catalytic oxidation section and the pall ring packing;

the flue gas inlet vertical pipe is connected with a high-energy ion bombardment device.

The evacuation chimney is connected with a demisting dehydration box 11, and the demisting dehydration box is connected with a flue gas de-whitening heating discharge device.

In this embodiment, the flue gas takes off white heating eduction gear includes SOx/NOx control draught fan 12, evacuation chimney 13 and chimney flue gas and takes off white heater 14, SOx/NOx control draught fan 12 entry is connected with defogging dehydration tank 11, and the export is connected with evacuation chimney 13, chimney flue gas takes off white heater 14 and installs in evacuation chimney 13 to install monitoring platform 15 on this evacuation chimney 13.

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 hot stove flue gas of ferroalloy ore treatment integration system which characterized in that: comprises a flue gas cooling device, a high-efficiency pretreatment device, a dust remover device, a high-energy ion bombardment device (9), a flue gas washing device and a flue gas whitening heating discharge device which are connected in sequence,

the flue gas of the ferroalloy submerged arc furnace is cooled by a flue gas cooling device, and then is pretreated by a high-efficiency pretreatment device, the pretreated flue gas enters a dust remover device for dust removal, the flue gas after dust removal enters high-energy ion bombardment for bombardment, the flue gas after bombardment enters a flue gas washing device, the washed flue gas enters a flue gas whitening heating discharge device, and finally the flue gas is discharged by the flue gas whitening heating discharge device.

2. The integrated system for flue gas treatment of the ferroalloy submerged arc furnace in claim 1, wherein: the flue gas cooling device comprises an indirect row air cooler (1), the inlet of the indirect row air cooler is the inlet of the flue gas of the ferroalloy submerged arc furnace, and the outlet of the indirect row air cooler is connected with the high-efficiency pretreatment device.

3. The integrated system for flue gas treatment of the ferroalloy submerged arc furnace in claim 1, wherein: the high-efficiency preprocessor adopts a parallel high-flow high-efficiency preprocessor (2), the preprocessor comprises a parallel high-flow spiral shell and a diffusion cyclone dust collector, the parallel high-flow spiral shell comprises two spirals which are symmetrically arranged and have inlets connected in parallel, cylindrical shutter fixed blades are arranged in the spirals, the spirals are opened at the upper and lower parts, the aperture of the upper opening is larger than that of the lower opening, the upper opening is connected with an outlet of the diffusion cyclone dust collector, and the lower opening is connected with a purified gas discharge pipe;

meanwhile, the spiral side surface is respectively provided with a dust-containing gas inlet and a concentration and diversion port, wherein the aperture of the dust-containing gas inlet is larger than that of the concentration and diversion port, the dust-containing gas inlet is connected with a dust-containing gas inlet pipe through a dust-containing gas inlet square-circle joint, the concentration and diversion port is connected with an inlet of a diffusion cyclone dust collector, and the dust-containing gas inlet pipe is connected with an outlet of a flue gas cooling device;

the outlet of the collected discharge pipe is connected with a positive pressure fan through flexible connection, and the positive pressure fan conveys the flue gas at the pretreated rear end to a dust remover device;

meanwhile, a dust storage pit (16) matched with the diffusion cyclone dust collector is arranged on the working site.

4. The integrated system for flue gas treatment of the ferroalloy submerged arc furnace in claim 1, wherein: the dust collector device comprises a basic support formed by a plurality of lower upright post steel frames, a plurality of duplex chamber ash bucket assemblies are fixedly arranged at the upper end of the basic support, filter bag chambers are arranged above the duplex chamber ash bucket assemblies, large cloth bag filter bags are arranged in the filter bag chambers through fixedly arranged filter bag hanging steel frames, the upper ends of the filter bag chambers are collected in a concentrated discharge air collecting pipe, and the concentrated discharge air collecting pipe is connected with a chimney; the chimney is connected with the high-energy ion bombardment device;

the duplex chamber-separating ash bucket assembly is provided with an air inlet rectangular opening, a filter bag fixing pipe opening and a square ash discharge opening, wherein the air inlet rectangular opening is connected with a flue gas chamber-separating ash bucket inclined rectangular pipe through a flue gas chamber-separating ash bucket transverse rectangular pipe, and the flue gas chamber-separating ash bucket inclined rectangular pipe is connected with a positive pressure fan; the filter bag fixing pipe orifice is positioned below the filter bag chamber;

the horizontal rectangular pipe of the flue gas inlet chamber ash hopper is connected with a high-efficiency preprocessor through a double-inlet double-support main fan (3), and a tapping induced draft fan (4) and a back-suction ash-removing ash-conveying fan (5) are arranged on the horizontal rectangular pipe of the flue gas inlet chamber ash hopper;

the ash discharge port is positioned below and provided with a rectangular ash conveying pipe, the ash discharge ports of the duplex chamber ash buckets are connected with the encryption bin (7) after being collected, the encryption bin is connected with the diffusion cyclone dust collector (8), and the clean air outlet of the diffusion cyclone dust collector is collected in the high-energy ion bombardment device.

5. The integrated system for flue gas treatment of the ferroalloy submerged arc furnace in claim 1, wherein: the high-energy ion bombardment device (9) comprises a rectangular flue, wherein an inlet reducer and an outlet reducer are respectively installed at the inlet and the outlet of the rectangular flue, a catalytic bombardment unit is installed in the rectangular flue and is connected with a power supply, untreated flue gas enters the rectangular flue through the inlet reducer and is discharged from the outlet reducer after being treated by the catalytic bombardment unit, the inlet reducer of the flue is connected with a dust remover device, and the outlet reducer is connected with a flue gas washing device.

6. The integrated system for flue gas treatment of the ferroalloy submerged arc furnace in claim 1, wherein: the flue gas washing device comprises a water-spinning hydraulic flue gas washing tower (10), the washing tower comprises an absorption reaction tower, a circulating water tank and an evacuation chimney, the absorption reaction tower and the evacuation chimney are arranged above the circulating water tank in parallel,

the upper end of the absorption reaction tower is provided with a gas-liquid distribution chamber, the middle section is an oxidation catalysis section, the lower end is provided with pall ring packing, the upper end of the gas-liquid distribution chamber is provided with a flue gas inlet diffusion cover, the upper end of the flue gas inlet diffusion cover is connected with a flue gas inlet vertical pipe with a downward opening through a 18-degree flue gas inlet elbow,

the lower part of the gas-liquid distribution chamber is provided with a separation flower plate, a separation ring is arranged in the middle of the separation flower plate, a plurality of partition plates are uniformly distributed on the periphery of the separation ring along the radial direction, the partition plates divide the separation flower plate into a plurality of same nozzle areas in equal parts, a plurality of broken line cup-shaped nozzles installed on the separation flower plate are arranged in the areas, meanwhile, the nozzle areas are provided with circulating liquid branch pipe distribution pipes, the circulating liquid branch pipe distribution pipes are connected with an annular circulating liquid branch main pipe fixedly installed on the periphery of the gas-liquid distribution chamber, and the annular circulating liquid branch main pipe is connected with a circulating liquid water pump through a circulating liquid vertical pipe;

the flue gas inlet vertical pipe is connected with a high-energy ion bombardment device,

the evacuation chimney is connected with a demisting dehydration box (11), and the demisting dehydration box is connected with a smoke whitening heating and discharging device.

7. The integrated system for flue gas treatment of the ferroalloy submerged arc furnace of claim 6, wherein: the flue gas takes off white heating eduction gear includes SOx/NOx control draught fan (12), and evacuation chimney (13) and chimney flue gas take off white heater (14), SOx/NOx control draught fan (12) entry is connected with defogging dehydration case (11), and exports and is connected with evacuation chimney (13), chimney flue gas takes off white heater (14) and installs in evacuation chimney (13) to install monitoring platform (15) on this evacuation chimney (13).

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