CN211620349U - Steel mill sludge treatment system - Google Patents
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- CN211620349U CN211620349U CN202020045606.8U CN202020045606U CN211620349U CN 211620349 U CN211620349 U CN 211620349U CN 202020045606 U CN202020045606 U CN 202020045606U CN 211620349 U CN211620349 U CN 211620349U
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Abstract
The utility model discloses a steel mill sludge treatment system belongs to sludge treatment technical field. It is including storing storehouse, desiccator, separator and feed bin, the desiccator meets with storing storehouse and separator respectively, and the desiccator bottom is provided with the admission line, and one end is provided with the exhaust tube, and the exhaust tube other end is provided with the valve, and meets with the separator, the separator lower extreme is provided with the feed bin. The system is reasonable in arrangement and convenient to use.
Description
Technical Field
The utility model belongs to the technical field of sludge treatment, more specifically say, relate to a steel mill sludge treatment system.
Background
The surface of cold-rolled strip steel or electric furnace special steel needs to be cleaned by water after being acid-washed, acid liquor remained on the surface is removed by water to form acid-containing wastewater, the acid-containing wastewater is inconvenient to transport and clean, lime is adopted for neutralization in a general method, and the neutralized slurry is clarified, so that insoluble substances in the slurry are precipitated to the bottom to form sludge, and liquid on the upper portion of the sludge can be recycled. And to the mud that produces, generally hardly handle, stack and the landfill to mud, all need occupy land resource, and because contain a large amount of metals and harmful substance in the mud, bury the back in the open air, through the rainwater soaking, mud can pollute near soil and water source, causes ecological environment's destruction, and reasonable treatment is needed urgently.
In the prior art, the Chinese patent application numbers are: 201710335693.3, publication date is: 2017.08.04, the system and method for sinter digestion steelmaking sludge comprises a sludge direct transmission pipeline and a sinter sludge pretreatment water pool, wherein: the device comprises a sludge direct conveying pipeline, a sintered sludge pretreatment water pool, a heating pipeline, a compressed gas pipeline and a sludge sintering pipeline, wherein a steelmaking sludge water pump is arranged on the sludge direct conveying pipeline, the sludge direct conveying pipeline is connected with the sintered sludge pretreatment water pool, the sintered sludge pretreatment water pool is internally provided with the heating pipeline, the compressed gas pipeline and the sludge sintering pipeline, the sintered sludge pump is arranged on the sludge sintering pipeline, and the sintered sludge pipeline is also connected with a sintered sludge nozzle; the compressed gas pipeline is connected with a compressed gas source; and the steelmaking sludge enters the sintering sludge pretreatment water tank through a steelmaking sludge water pump through a sludge direct delivery pipeline, is stirred through the compressed gas pipeline and is heated through the heating pipeline. The method for sintering and digesting the steelmaking sludge by using the system solves the problem of sludge direction; however, the sludge is not dehydrated, so that the energy consumption rate is high, and the production is not facilitated.
The Chinese patent application numbers are: 201910567255.9, the announcement date is: 2019.09.13 discloses a lightweight aggregate prepared from steel mill sludge, which is prepared from 10-40% of steel mill sludge and 60-90% of fly ash, and the preparation method comprises the following steps: drying, crushing, grinding and sieving the steel mill sludge, adding sieved fly ash, uniformly mixing according to a certain weight ratio, pelletizing, drying raw material pellets for a certain time, carrying out heat treatment, sintering and cooling to obtain an aggregate finished product. The sludge of a steel mill is used for preparing the lightweight aggregate, so that the problem of sludge movement is well solved; however, in the process of processing the sludge, a large amount of energy is consumed for processing, which is not beneficial to energy conservation and environmental protection.
The Chinese patent application numbers are: 201810587630.1, publication date is: 2018.11.02 discloses a method for treating cold rolling acid waste water and the application of sintering semi-dry desulphurization ash, which adopts sintering semi-dry desulphurization ash to neutralize cold rolling acid waste water and utilizes sintering semi-dry desulphurization ash to treat cold rolling acid waste waterAlkaline substances such as Ca (OH)2, Ca0, CaS03 and the like in the semidry desulfurization ash are neutralized to treat the cold rolling acid wastewater, so that the wastewater reaches the reclaimed water reuse standard through the processes of aeration, neutralization, PH regulation, flocculation sedimentation and the like; SO generated during the treatment2Can be recycled for preparing sulfuric acid; the sludge generated in the treatment process can be added with blast furnace granulated slag after concentration, filter pressing and dehydration, and the slag micro powder is prepared after the treatment of the vertical mill process, so that the quality of the slag micro powder can be obviously improved. The method can simultaneously treat the sintering semidry desulfurization ash and the cold rolling acid wastewater, solves the problem of environmental protection, and realizes the treatment of waste by waste; however, the wastewater treatment needs to utilize a large amount of energy, and cannot achieve comprehensive and effective utilization of the energy.
Disclosure of Invention
1. Problems to be solved
Produce the unable effective processing of mud or the problem that treatment cost is high, the energy consumption is high, CO2 discharges highly in the sludge treatment process to current steel mill, the utility model provides a steel mill sludge treatment system carries out the standardization to mud and handles, has solved above-mentioned problem.
2. Technical scheme
In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
the utility model discloses a steel mill sludge treatment system, including storing storehouse, desiccator, separator and feed bin, the desiccator meets with storing storehouse and separator respectively, and the desiccator bottom is provided with the admission line, and one end is provided with the exhaust tube, and the exhaust tube other end is provided with the valve, and meets with the separator, the separator lower extreme is provided with the feed bin.
As the utility model discloses a preferred, the contained angle that forms between desiccator and the horizontal plane is the acute angle.
As the utility model discloses a preferred, the desiccator is cup jointed by the sleeve of skin and inlayer and is formed, sets up stirring vane between skin and the inlayer sleeve.
As the utility model discloses a preferred, store and be connected through first conveyer between storehouse and the desiccator, desiccator mud feed inlet is located first conveyer lower part, store the storehouse and be two open-ended types, upper portion is used for the feeding, and the lower part is used for the ejection of compact, first conveyer is shaftless type screw conveyer.
As the utility model discloses a preferred, still include sintering machine and blast furnace, the feed bin bottom sets up the fan, is connected through the second conveyer between feed bin and the sintering machine, and the sintering machine meets with the blast furnace.
As the utility model discloses a preferred, still include gas cleaning device, valve and separator pass through the tee junction.
As the utility model discloses a preferred, gas cleaning device, valve and separator junction are provided with the thermoscope.
3. Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a steel mill sludge treatment system, carry out the mud through storing the storehouse and store, two upper and lower open-type are adopted in the storage storehouse, upper portion is used for throwing into mud, the lower extreme opening takes out mud, carry out the next step and handle, can realize the serialization of mud and put in, the desiccator bottom sets up inlet channel, put into the flue gas through inlet channel, the flue gas flows from bottom to top, the time of persisting in the desiccator is longer, the contact time between flue gas and mud is more of a specified duration, on the one hand, the flue gas is better to the drying effect of mud, on the other hand be convenient for get rid of the solid particle in the mud flue gas, the result of;
(2) the utility model discloses a steel mill sludge treatment system, the desiccator carries the mud that the drying was accomplished to the separator in, separates mud and flue gas by the separator, and the mud after the separation can be carried to next station and use, and the flue gas of separation can get back to the desiccator through valve and exhaust tube and further utilize, makes the high-usage of flue gas, accomplishes the reasonable effective utilization to the resource;
(3) the utility model discloses a steel mill sludge treatment system, the desiccator comprises interior outer sleeve, mud between interior outer sleeve, area of contact is big, drying efficiency is high, the desiccator is when placing, if vertical direction is placed, mud piles up in the bottom easily, be unfavorable for the flue gas to pass through, if horizontal direction is placed, the flue gas can't be from the in-process of desiccator one end flow direction to the other end, fill up whole desiccator, and in the drying process, set up stirring vane in the desiccator, stir mud through stirring vane, the size of mud diminishes, make mud be in the state of motion, increase the area of contact of mud and flue gas, reduce the drying time of mud, realize the more effective utilization to the flue gas resource;
(4) the utility model discloses a steel mill sludge treatment system, after carrying out drying process with mud, transport it to the sintering machine and sinter as sintering raw materials, because mud is produced in the washing steel surface, contain a large amount of iron in the mud, can replace a part sintering raw materials originally through the ratio, promptly handled mud, be used for the sintering simultaneously and can not produce the pollutant beyond the sintering, resources are saved, convenient to use;
(5) the utility model discloses a steel mill sludge treatment system, the separator lower part sets up the feed bin for store the mud after the drying, be used for subsequent sintering process, the mud is in the process of down going to the export in the feed bin, can take place the jam, blows through the fan, makes the mud of drying be in the developments down in-process, can not take place the jam, can clear up the remaining flue gas in the feed bin simultaneously, makes the flue gas get back to the separator from the feed bin entry;
(6) the utility model discloses a steel mill sludge treatment system, whether the flue gas can get back to the desiccator through the exhaust tube and recycle, depend on the temperature of flue gas, if the flue gas temperature after the drying is still higher, is higher than the setting value of thermoscope, then the valve is opened, and the flue gas returns to the desiccator through the exhaust tube and continues to utilize, otherwise the valve is closed, purifies the flue gas.
Drawings
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a schematic view showing the construction of a sludge treatment apparatus;
in the drawings: 1. a storage bin; 2. a first conveyor; 3. a dryer; 4. a separator; 5. a storage bin; 6. a fan; 7. a valve; 8. an air exhaust pipe; 9. a flue gas purification device; 10. a second conveyor; 11. sintering machine; 12. a blast furnace.
Detailed Description
The following detailed description of exemplary embodiments of the invention refers to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration exemplary embodiments in which the invention may be practiced. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that various changes to the invention may be made without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the invention, as claimed, but is presented for purposes of illustration only and not limitation to provide the best mode contemplated for carrying out the invention and to enable any person skilled in the art to practice the invention. Accordingly, the scope of the invention is to be limited only by the following claims.
The detailed description and exemplary embodiments of the invention may be better understood when read in conjunction with the following drawings, where the elements and features of the invention are identified by reference numerals.
Example 1
As shown in fig. 1, the steel mill sludge treatment system of the present embodiment includes a storage bin 1, a first conveyor 2, a dryer 3, a separator 4, a storage bin 5, a blower 6, a valve 7, an air suction pipe 8, a flue gas purification device 9, a second conveyor 10, a sintering machine 11, and a blast furnace 12. Through the use of above-mentioned device and mechanical parts, can realize carrying out drying process to the mud that the steel mill produced, at the in-process of handling, introduce the flue gas that produces in the steel mill production process, utilize the surplus temperature realization of flue gas to the drying of mud, the use of the energy has been practiced thrift, realize waste utilization, and simultaneously, the flue gas is at the in-process that passes through mud, mud can realize the effective absorption to solid particle thing and other harmful substance in the flue gas, the energy that the follow-up processing of flue gas consumed has been practiced thrift, energy-concerving and environment-protective, the high-usage of the energy.
Store 1 lower extreme in storehouse and set up first conveyer 2, store and be connected through first conveyer 2 between storehouse 1 and the desiccator 3, 3 mud feed inlets of desiccator are located 2 lower parts of first conveyer, 3 bottoms of desiccator are provided with admission line, desiccator 3 meets with separator 4, 4 lower extremes of separator are provided with feed bin 5, 5 bottoms in feed bin set up fan 6, connect through second conveyer 10 between feed bin 5 and the sintering machine 11, sintering machine 11 meets with blast furnace 12. The flue gas outlet of the separator 4 is provided with a tee joint and a gas temperature measuring instrument, the other two ends of the tee joint are respectively provided with a flue gas purifying device 9 and a valve 7, the valve 7 is connected with an exhaust pipe 8, and the other end of the exhaust pipe 8 is connected with the dryer 3.
Above-mentioned steel mill sludge treatment system mainly carries out the drying through the flue gas to mud to and mud adsorbs the flue gas, in order to reach energy-concerving and environment-protective, waste utilization's purpose, as shown in figure 1, A department is mud feed department, for storage silo 5, carries out mud through storing storehouse 1 and stores, two opening types about storing storehouse 1 adopts, and upper portion is used for dropping into mud, and the lower extreme opening takes out mud, handles on next step, can realize the serialization of mud and put in. The B position is a smoke gas inlet position, the bottom of the dryer 3 is provided with a gas inlet channel, and smoke gas is fed through the gas inlet channel.
The first conveyor 2 and the second conveyor 10 are shaftless screw conveyors, and the conveying efficiency is high by combining the characteristics of sludge. The dryer 3 is formed by sleeving an outer sleeve and an inner sleeve, stirring blades are arranged between the outer sleeve and the inner sleeve, and an included angle formed between the dryer 3 and a horizontal plane is an acute angle. Desiccator 3 comprises interior outer sleeve, sludge between the inner and outer sleeve, area of contact is big, drying efficiency is high, desiccator 3 is when placing, if vertical orientation is placed, then mud is piled up in the bottom easily, be unfavorable for the flue gas to pass through, if the horizontal direction is placed, then the flue gas can't follow the in-process of desicator one end flow direction other end, be full of whole desiccator 3, and in the drying process, set up stirring vane in the desiccator 3, stir mud through stirring vane, become the size of mud, make mud be in the state of motion, the area of contact of increase mud and flue gas, reduce the drying time of mud, realize the more effective utilization to the flue gas resource. 3 inclination of desiccator of this embodiment is 45, and the flue gas is by supreme flowing down, and the time of persisting is longer in desiccator 3, and the contact time between flue gas and the mud is more of a specified duration, and the flue gas is better to the drying effect of mud on the one hand, and on the other hand is convenient for get rid of the solid particle in the mud flue gas, the result of use preferred.
The separator 4 separates the dried sludge conveyed in the dryer 3, the dried sludge enters the bin 5, the flue gas is discharged out of the separator 4, the temperature of the flue gas is measured by a gas thermometer at the flue gas outlet of the separator 4, whether the flue gas can return to the dryer 3 through the air suction pipe 8 for reuse is determined, and if the temperature of the dried flue gas is still higher than the set value of the temperature measurer, the valve 7 is opened, the flue gas returns to the dryer 3 through the air suction pipe 8 for continuous use, and if not, the valve 7 is closed, and the flue gas is purified; the utilization rate of the flue gas is high, and the reasonable and effective utilization of resources is completed. 4 lower parts of separator set up feed bin 5 for store the mud after the drying, be used for subsequent sintering process, mud is in feed bin 5 down to the in-process of export, can take place to block up, blows through fan 6 for the mud of drying is in the developments down in-process, can not take place to block up, can clear up remaining flue gas in the feed bin 5 simultaneously, makes the flue gas get back to in the separator 4 from the 5 entrys of feed bin. The flue gas purification device 9 is the prior art, and mechanical equipment for flue gas purification in a factory can be used.
The dry sludge is conveyed to the sintering machine 11 from the bin 5 through the second conveyor 10 and is sintered as a sintering raw material, and the sludge is generated by cleaning the surface of steel, so that the sludge contains a large amount of iron, can replace a part of the original sintering raw material through proportioning, namely, the sludge is treated, and meanwhile, the sludge is used for sintering, so that pollutants except for sintering can not be generated, resources are saved, and the use is convenient.
Example 2
The steel mill sludge treatment system of the embodiment is basically the same as that of the embodiment 1, except that the included angle between the dryer 3 and the horizontal plane is 60 degrees.
Example 3
The steel mill sludge treatment system of the embodiment is basically the same as that of the embodiment 1, except that the angle between the dryer 3 and the horizontal plane is 30 °.
Example 4
The steel mill sludge treatment system of the embodiment is basically the same as that of the embodiment 1, except that the angle between the dryer 3 and the horizontal plane is 85 °.
Example 5
The steel mill sludge treatment system of the embodiment is basically the same as that of the embodiment 1, except that the angle between the dryer 3 and the horizontal plane is 15 °.
Example 6
The method for utilizing the steel mill sludge comprises the following steps on the basis of any one of the embodiments 1 to 5:
s1, conveying the sludge with the water content of 65 percent (the water content of the sludge is controlled mainly to be convenient for transportation and avoid unnecessary resource waste) to a steel mill sludge treatment system through a dump truck, and pouring the sludge with the volume of 150m3The storage silo 1. Closing a feed port of the storage bin 1, opening a sludge discharge port, conveying sludge to a screw conveyor at the lower part of the storage bin 1 by virtue of gravity, and conveying the sludge to a dryer 3; waste heat flue gas with the temperature of 400 ℃ is introduced into a cold rolling bell-type furnace or a continuous annealing furnace to dry sludge, and the flow rate of the waste heat flue gas is 12Wm3And h, drying for 4 hours, wherein in the drying process, the dryer 3 rotates, large-particle sludge is scattered through stirring blades or other scattering devices, and dried sludge particles are conveyed to the separator 4 through the fan 6.
S2, conveying the dried sludge and the flue gas into a separator 4, separating the dried sludge and the flue gas in the separator 4, feeding the dried sludge into a storage bin 5, and discharging the flue gas out of the separator 4 through a pipeline; the separator 4 is located at the upper part of the silo 5, and the particle size is selected to enter the silo 5 at the lower part of the separator 4 according to the requirement. The separator 4 for separating belongs to the separation of materials and belongs to the prior art.
S3, measuring the temperature of the flue gas discharged by the separator 4 through a gas temperature measuring instrument, wherein the set temperature of the gas temperature measuring instrument is 140 ℃ (140 ℃ is for energy utilization angle, and the lower temperature is not ideal for the drying effect of the sludge), the temperature of the flue gas dried by the dryer 3 is 220 ℃, the flue gas purification device 9 is closed, the valve 7 is opened, the flue gas returns to the dryer 3 through the valve 7 and the exhaust pipe 8 for reuse, the sludge in the storage bin 5 contains 1.0% of water, 1.5mm of average particle size and 26% of CaO (the control of the water content avoids the influence on sintering as a sintering raw material, the selection of the particle size is also based on the consideration of the sintering raw material, and the CaO content is the grade after sintering.
S4, conveying the dried sludge to a sintering bin 5 through a tank truck, and sintering and ore blending to a sintering machine 11 according to the proportion of 0.5% (excessive blending ratio, more impurities and influence on the production of a blast furnace 12); the sinter is then transported to the blast furnace 12 by a conveyor, and is melted in the blast furnace 12 at a temperature exceeding 1550 ℃, beneficial elements are utilized, and impurities become blast furnace 12 slag for application. The blast furnace 12 is melted at a temperature of more than or equal to 1350 ℃, beneficial elements such as Fe, Ca, Mg, C and the like are utilized, and impurities such as Si, Al and the like become blast furnace 12 slag.
According to the method, the existing low-temperature waste heat resources are utilized to carry out decrement pretreatment on the sludge according to the characteristics of a sludge generating enterprise, and then resource utilization is carried out according to the characteristics of the sludge, so that the problem of sludge occupation is solved, the equipment is simple to operate, secondary waste is not generated, the real treatment and utilization of the sludge are realized, the method is actually applied at present, the treatment cost is removed, the cost is saved for 5148 ten thousand yuan per year for a company, and the emission of CO2 is reduced by 1100 tons.
In the process of handling the flue gas to the steel mill, often because contain a large amount of particulate matters and organic matter in the flue gas, the load that the particulate matter can make the flue gas handle is great, the organic matter then is the existence of not being convenient for to handle in the flue gas, and pass through mud with the flue gas after, the particulate matter in the flue gas adsorbs on mud for flue gas follow-up handling is comparatively light, and detects the organic matter in the flue gas, and the organic matter in the flue gas is reduced by a wide margin, has solved the difficulty of organic matter follow-up handling in the flue gas.
The particles and organic matters in the flue gas are sintered and then placed in the blast furnace 12 to finally become blast furnace 12 slag.
Example 7
The method for utilizing the steel mill sludge comprises the following steps on the basis of any one of the embodiments 1 to 5:
s1, conveying the sludge with the water content of 55% to a sludge treatment system of a steel mill through a dump truck, and pouring the sludge with the volume of 120m3The storage silo 1. Closing a feed port of the storage bin 1, opening a sludge discharge port, conveying sludge to a screw conveyor at the lower part of the storage bin 1 by virtue of gravity, and conveying the sludge to a dryer 3; waste heat flue gas with the temperature of 360 ℃ is introduced into the cold rolling pickling roasting furnace to dry sludge, and the flow rate of the waste heat flue gas is 12Wm3And h, drying for 3 hours, wherein in the drying process, the dryer 3 rotates, large-particle sludge is scattered through stirring blades or other scattering devices, and dried sludge particles are conveyed to the separator 4 through the fan 6.
S2, conveying the dried sludge and the flue gas into a separator 4, separating the dried sludge and the flue gas in the separator 4, feeding the dried sludge into a storage bin 5, and discharging the flue gas out of the separator 4 through a pipeline; the separator 4 is located at the upper part of the silo 5, and the particle size is selected to enter the silo 5 at the lower part of the separator 4 according to the requirement. The separator 4 for separating belongs to the separation of materials and belongs to the prior art.
S3, measuring the temperature of the flue gas discharged by the separator 4 through a gas temperature measuring instrument, wherein the set temperature of the gas temperature measuring instrument is 140 ℃, the temperature of the flue gas dried by the dryer 3 is 180 ℃, the flue gas purification device 9 is closed, the valve 7 is opened, the flue gas returns to the dryer 3 through the valve 7 and the exhaust pipe 8 for reuse, and the water content of the sludge in the storage bin 5 is 4.3%, the average particle size is 0.95mm, and the CaO content is 18%.
S4, conveying the dried sludge to a sintering bin 5 through a tank truck, and sintering and blending the sludge to a sintering machine 11 according to the proportion of 0.2%; the sinter is then transported to the blast furnace 12 by a conveyor, and is melted in the blast furnace 12 at a temperature exceeding 1550 ℃, beneficial elements are utilized, and impurities become blast furnace 12 slag for application.
Example 8
The method for utilizing the steel mill sludge comprises the following steps on the basis of any one of the embodiments 1 to 5:
s1, conveying the sludge with the water content of 58% to a sludge treatment system of a steel mill through a dump truck, and pouring the sludge with the volume of 100m3The storage silo 1. Closing a feed port of the storage bin 1, opening a sludge discharge port, conveying sludge to a screw conveyor at the lower part of the storage bin 1 by virtue of gravity, and conveying the sludge to a dryer 3; flue gas with sintering waste heat of 200 ℃ is introduced to dry sludge, and the flow rate of the flue gas with the waste heat is 10Wm3And h, drying for 2.5 hours, wherein in the drying process, the dryer 3 rotates, large-particle sludge is broken up through stirring blades or other breaking-up devices, and dried sludge particles are conveyed to the separator 4 through the fan 6.
S2, conveying the dried sludge and the flue gas into a separator 4, separating the dried sludge and the flue gas in the separator 4, feeding the dried sludge into a storage bin 5, and discharging the flue gas out of the separator 4 through a pipeline; the separator 4 is located at the upper part of the silo 5, and the particle size is selected to enter the silo 5 at the lower part of the separator 4 according to the requirement. The separator 4 for separating belongs to the separation of materials and belongs to the prior art.
S3, measuring the temperature of the flue gas discharged by the separator 4 through a gas temperature measuring instrument, wherein the set temperature of the gas temperature measuring instrument is 140 ℃, the temperature of the flue gas dried by the dryer 3 is 110 ℃, the valve 7 is closed, the flue gas purification device 9 is opened, the flue gas is purified, and the water content of the sludge in the storage bin 5 is 1.5%, the average particle size is 1.2mm, and the CaO content is 22%.
S4, conveying the dried sludge to a sintering bin 5 through a tank truck, and sintering and ore blending to a sintering machine 11 according to the proportion of 0.4%; the sinter is then transported to the blast furnace 12 by a conveyor, and is melted in the blast furnace 12 at a temperature exceeding 1550 ℃, beneficial elements are utilized, and impurities become blast furnace 12 slag for application.
Example 9
The method for utilizing the steel mill sludge comprises the following steps on the basis of any one of the embodiments 1 to 5:
s1, conveying the sludge with the water content of 60% to a sludge treatment system of a steel mill through a dump truck, and pouring the sludge with the volume of 80m3The storage silo 1. Closing a feed port of the storage bin 1, opening a sludge discharge port, conveying sludge to a screw conveyor at the lower part of the storage bin 1 by virtue of gravity, and conveying the sludge to a dryer 3; the waste heat flue gas of a coal-fired boiler of a power plant at 280 ℃ is introduced to dry the sludge, and the flow rate of the waste heat flue gas is 10Wm3And h, drying for 2 hours, wherein in the drying process, the dryer 3 rotates, large-particle sludge is scattered through stirring blades or other scattering devices, and dried sludge particles are conveyed to the separator 4 through the fan 6.
S2, conveying the dried sludge and the flue gas into a separator 4, separating the dried sludge and the flue gas in the separator 4, feeding the dried sludge into a storage bin 5, and discharging the flue gas out of the separator 4 through a pipeline; the separator 4 is located at the upper part of the silo 5, and the particle size is selected to enter the silo 5 at the lower part of the separator 4 according to the requirement. The separator 4 for separating belongs to the separation of materials and belongs to the prior art.
S3, measuring the temperature of the flue gas discharged by the separator 4 through a gas temperature measuring instrument, wherein the set temperature of the gas temperature measuring instrument is 140 ℃, the temperature of the flue gas dried by the dryer 3 is 150 ℃, the flue gas purification device 9 is closed, the valve 7 is opened, the flue gas returns to the dryer 3 through the valve 7 and the exhaust pipe 8 for reuse, and the water content of the sludge in the storage bin 5 is 0.8%, the average particle size is 1.1mm, and the CaO content is 24%.
S4, conveying the dried sludge to a sintering bin 5 through a tank truck, and sintering and blending the sludge to a sintering machine 11 according to the proportion of 0.3%; the sinter is then transported to the blast furnace 12 by a conveyor, and is melted in the blast furnace 12 at a temperature exceeding 1550 ℃, beneficial elements are utilized, and impurities become blast furnace 12 slag for application.
Claims (7)
1. The utility model provides a steel mill sludge treatment system, its characterized in that, including storing storehouse (1), desiccator (3), separator (4) and feed bin (5), desiccator (3) meet with storing storehouse (1) and separator (4) respectively, and desiccator (3) bottom is provided with admission line, and one end is provided with exhaust tube (8), and the exhaust tube (8) other end is provided with valve (7), and meets with separator (4), separator (4) lower extreme is provided with feed bin (5).
2. A steel mill sludge treatment system according to claim 1, wherein the angle formed between the dryer (3) and the horizontal plane is acute.
3. A steel mill sludge treatment system according to claim 1, wherein the dryer (3) is formed by sleeving an outer sleeve and an inner sleeve, and stirring blades are arranged between the outer sleeve and the inner sleeve.
4. A steel mill sludge treatment system according to claim 1, wherein the storage bin (1) is connected with the dryer (3) through a first conveyor (2), the sludge feeding port of the dryer (3) is positioned at the lower part of the first conveyor (2), the storage bin (1) is of a double-opening type, the upper part is used for feeding, the lower part is used for discharging, and the first conveyor (2) is a shaftless screw conveyor.
5. A steel mill sludge treatment system according to any one of claims 1 to 4, further comprising a sintering machine (11) and a blast furnace (12), wherein a fan (6) is arranged at the bottom of the bin (5), the bin (5) is connected with the sintering machine (11) through a second conveyor (10), and the sintering machine (11) is connected with the blast furnace (12).
6. A steel mill sludge treatment system according to claim 1, further comprising a flue gas purification device (9), wherein the flue gas purification device (9), the valve (7) and the separator (4) are connected by a tee.
7. A steel mill sludge treatment system according to claim 6, wherein a temperature measuring instrument is arranged at the connection of the flue gas purification device (9), the valve (7) and the separator (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020045606.8U CN211620349U (en) | 2020-01-09 | 2020-01-09 | Steel mill sludge treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020045606.8U CN211620349U (en) | 2020-01-09 | 2020-01-09 | Steel mill sludge treatment system |
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