CN115784562A - Hot rolling sludge treatment system - Google Patents
Hot rolling sludge treatment system Download PDFInfo
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- CN115784562A CN115784562A CN202211586452.3A CN202211586452A CN115784562A CN 115784562 A CN115784562 A CN 115784562A CN 202211586452 A CN202211586452 A CN 202211586452A CN 115784562 A CN115784562 A CN 115784562A
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- rare earth
- hot rolling
- water
- earth magnetic
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- 239000010802 sludge Substances 0.000 title claims abstract description 40
- 238000005098 hot rolling Methods 0.000 title claims abstract description 29
- 230000005291 magnetic effect Effects 0.000 claims abstract description 57
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 30
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 29
- 238000004062 sedimentation Methods 0.000 claims abstract description 21
- 238000000746 purification Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000002893 slag Substances 0.000 claims description 13
- 238000005119 centrifugation Methods 0.000 claims description 5
- 238000005189 flocculation Methods 0.000 claims description 5
- 230000016615 flocculation Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 20
- 239000000126 substance Substances 0.000 abstract description 17
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 12
- 230000009471 action Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000026058 directional locomotion Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a hot rolling sludge treatment system which comprises a rolling mill, wherein an iron oxide skin ditch is arranged below the rolling mill, one end of the iron oxide skin ditch is provided with a flow channel, the iron oxide skin ditch is connected with a rotational flow sedimentation tank through the flow channel, one side of the rotational flow sedimentation tank is provided with a feeding device, and the output end of the rotational flow sedimentation tank is communicated with a tubular mixer; the tubular mixer is connected with rare earth magnetic disc separation and purification equipment, the output end of the rare earth magnetic disc separation and purification equipment is communicated with an advection oil separation tank, a disc oil removing machine is arranged at the output end of the advection oil separation tank, a horizontal screw centrifuge is further arranged in the advection oil separation tank, and the output end of the disc oil removing machine is connected with a cooling tower. Ferromagnetic substance particles in the hot rolling sludge, nonmagnetic substance particles and oil residues which are flocculated and adsorbed on the ferromagnetic substance particles are quickly oriented to move under the action of the magnetic field force of the rare earth magnetic disk machine and are adsorbed on the surface of a magnetic disk of the rare earth magnetic disk machine, so that suspended matters and oil in the hot rolling sludge are adsorbed and separated.
Description
Technical Field
The invention belongs to the technical field of energy conservation and environmental protection, and particularly relates to a hot rolling sludge treatment system.
Background
The hot rolling sludge is small-particle iron sludge and impurities which are obtained by removing large-particle iron scales from hot rolling turbid circulating water containing steel billet dephosphorization iron scales and equipment lubricating grease through a cyclone well and then entering an advection pool for precipitation.
The hot-rolled sludge often contains a large amount of oil in addition to fine-grained iron oxide scale, and when a plate-and-frame filter press, a belt filter press or a vacuum filter press or other dewatering equipment with filter cloth is adopted, the filter cloth is easily blocked and is inconvenient to clean.
Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a hot rolling sludge treatment system.
Disclosure of Invention
An object of the present invention is to provide a hot rolling sludge treatment system to solve at least one aspect of the problems and disadvantages set forth in the above background art.
According to one aspect of the invention, the hot rolling sludge treatment system comprises a rolling mill, wherein an iron oxide skin ditch is arranged below the rolling mill, one end of the iron oxide skin ditch is provided with a flow channel, the iron oxide skin ditch is connected with a rotational flow sedimentation tank through the flow channel, one side of the rotational flow sedimentation tank is provided with a feeding device, one output end of the rotational flow sedimentation tank is communicated with a tubular mixer, and the other output end of the rotational flow sedimentation tank is communicated with the flow channel;
the tube mixer is connected with rare earth magnetic disc separation and purification equipment, the output intercommunication of rare earth magnetic disc separation and purification equipment has the advection oil interceptor, the output in advection oil interceptor is equipped with the disc deoiling machine, still be provided with horizontal spiral shell centrifuge in the advection oil interceptor, the output of disc deoiling machine is connected with the cooling tower, the cooling tower is linked together through the input of pipeline filter and bundle machine.
According to another exemplary embodiment of the invention, the rare earth magnetic disk separation and purification equipment comprises a rare earth magnetic disk machine, a dosing device and a magnetic squeezing dehydrator, wherein the magnetic squeezing dehydrator comprises a transmission system, a dehydration system, a slag inlet and outlet system and a rack.
According to another exemplary embodiment of the invention, the iron oxide skin ditch conveys the hot-rolled sludge to a cyclone sedimentation tank through a runner for primary sedimentation and layering; the water on the upper layer is pressurized and reflows to the flow channel by the pump, the muddy water on the lower layer is sent to the tubular mixer by the lift pump set, and the water treatment agent is added into the tubular mixer by the adding device to generate flocculation reaction.
According to another exemplary embodiment of the present invention, the pipe mixer feeds the reacted slurry water to the rare earth magnetic disk machine, the rare earth magnetic disk machine separates out flocs in the slurry water and discharges the flocs to the magnetic press dehydrator, and the magnetic press dehydrator continuously dehydrates the flocs.
According to another exemplary embodiment of the invention, the rare earth magnetic disk machine sends the treated muddy water to the advection oil interceptor through a slag inlet and outlet system, and a plurality of disc type floatation recoverers are arranged at the water outlet of the advection oil interceptor and used for removing floating oil in the muddy water.
According to another exemplary embodiment of the invention, the horizontal flow oil separation tank sends the deoiled muddy water to a cooling water tower for cooling, and the cooled muddy water is transported to a pipeline filter through a circulating pump for filtering to form circulating water.
According to another exemplary embodiment of the present invention, the horizontal decanter centrifuge comprises a screw, a rotary drum and a helical blade, the bottom sludge of the advection oil separation tank enters the rotary drum through the screw for centrifugation, and the helical blade scrapes off and discharges the bottom sludge deposited on the inner wall of the rotary drum after centrifugation.
Compared with the prior art, the invention has the beneficial effects that:
ferromagnetic substance particles in the hot rolling sludge, nonmagnetic substance particles and oil residues adsorbed on the ferromagnetic substance particles and the particles in a flocculation mode can overcome external forces such as fluid resistance, particle gravity and the like under the action of magnetic field force of the rare earth magnetic disk machine, and the ferromagnetic substance particles and the oil residues are adsorbed on the surface of a magnetic disk of the rare earth magnetic disk machine to generate rapid directional motion, so that suspended matters and oil in the hot rolling sludge are adsorbed and separated, and the hot rolling sludge is prevented from being blocked during dewatering.
Drawings
To facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow chart of a hot rolling sludge treatment system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are further described in detail below by way of examples with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting a hot rolling sludge treatment system of the present invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagram form to simplify the drawing.
According to a general technical concept of the invention, as shown in fig. 1, a hot rolling sludge treatment system is provided, which comprises a rolling mill, wherein an iron oxide skin ditch is arranged below the rolling mill, one end of the iron oxide skin ditch is provided with a flow channel, the iron oxide skin ditch is connected with a rotational flow sedimentation tank through the flow channel, one side of the rotational flow sedimentation tank is provided with a feeding device, one output end of the rotational flow sedimentation tank is communicated with a tubular mixer, and the other output end of the rotational flow sedimentation tank is communicated with the flow channel;
the tube mixer is connected with rare earth magnetic disc separation and purification equipment, the output end of the rare earth magnetic disc separation and purification equipment is communicated with an advection oil separation tank, a disc oil remover is arranged at the output end of the advection oil separation tank, a horizontal screw centrifuge is further arranged in the advection oil separation tank, the output end of the disc oil remover is connected with a cooling tower, and the cooling tower is communicated with the input end of the binding machine through a pipeline filter.
Compared with the prior art, the hot rolling sludge treatment system provided by the invention has the advantages that ferromagnetic substance particles in the hot rolling sludge, nonmagnetic substance particles and oil residues which are adsorbed on the ferromagnetic substance particles in a flocculation manner can overcome external forces such as fluid resistance, particle gravity and the like under the action of the magnetic field force of the rare earth magnetic disk machine, and the ferromagnetic substance particles and the nonmagnetic substance particles and the oil residues are adsorbed on the ferromagnetic substance particles, so that the ferromagnetic substance particles and the nonmagnetic substance particles and the oil residues can generate rapid directional movement and are adsorbed on the surface of the magnetic disk of the rare earth magnetic disk machine, suspended matters and oil in the hot rolling sludge are adsorbed and separated, and the hot rolling sludge is prevented from being blocked during dewatering.
The rare earth magnetic disk separation and purification equipment comprises a rare earth magnetic disk machine, a dosing device and a magnetic squeezing dehydrator, wherein the magnetic squeezing dehydrator comprises a transmission system, a dehydration system, a slag inlet and outlet system and a rack.
The invention relates to a rare earth magnetic disk separation and purification wastewater technology process which is briefly described as follows:
s1, when fluid flows through a flow channel between magnetic disks, magnetic suspension floccules contained in the fluid are adsorbed on the magnetic disks under the action of a strong magnetic field force and are gradually separated from the fluid;
s2, the magnetic disc rotates at the speed of 5.8r/min, most of water is removed from suspended matters, when the magnetic disc runs to a slag scraping strip, a magnetic isolation slag discharging belt is formed, the magnetic isolation slag discharging belt is scraped into a spiral conveyer by a slag scraping wheel, and slag is conveyed into a slag pool;
s3, the magnetic disc is transferred into the fluid again after the slag is removed, so that a repeated wastewater treatment process is formed, and the purposes of wastewater purification, suspended matter recovery and circulating water recycling are achieved.
Transporting the hot-rolled sludge to a rotational flow sedimentation tank through a runner by the iron oxide scale ditch for primary sedimentation to form layering; the water at the upper layer is pressurized and reflows to the flow channel through the pump, the muddy water at the lower layer is sent to the tubular mixer through the lift pump set, and the water treatment agent is added into the tubular mixer by the adding device to generate flocculation reaction.
In this embodiment, the water treatment agent is polyaluminum chloride, which can flocculate non-ferromagnetic substances and oils with ferromagnetic substances.
The tubular mixer sends the reacted mud water to the rare earth magnetic disk machine, the rare earth magnetic disk machine separates out the floccules in the mud water and discharges the floccules to the magnetic squeezing dehydrator, and the magnetic squeezing dehydrator continuously dehydrates the floccules.
And the rare earth magnetic disk machine sends the treated muddy water to the advection oil separation tank through a slag inlet and outlet system, and a plurality of disc type floating recovery machines are arranged at the water outlet of the advection oil separation tank and are used for removing floating oil in the muddy water.
And the horizontal flow oil separation tank sends the deoiled muddy water to a cooling water tower for cooling, and the cooled muddy water is conveyed to a pipeline filter through a circulating pump for filtering to form circulating water.
The horizontal screw centrifuge comprises a spiral body, a rotary drum and spiral blades, bottom mud of the advection oil separation tank enters the rotary drum through the spiral body to be centrifuged, and the spiral blades scrape and discharge the bottom mud deposited on the inner wall of the rotary drum after centrifugation.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The hot rolling sludge treatment system comprises a rolling mill and is characterized in that:
an iron oxide skin ditch is arranged below the rolling mill, a flow channel is arranged at one end of the iron oxide skin ditch, the iron oxide skin ditch is connected with a rotational flow sedimentation tank through the flow channel, an adding device is arranged at one side of the rotational flow sedimentation tank, one output end of the rotational flow sedimentation tank is communicated with a tubular mixer, and the other output end of the rotational flow sedimentation tank is communicated with the flow channel;
the tube mixer is connected with a rare earth magnetic disc separation and purification device, the output end of the rare earth magnetic disc separation and purification device is communicated with an advection oil separation tank, a disc oil removing machine is arranged at the output end of the advection oil separation tank, a horizontal spiral centrifugal machine is further arranged in the advection oil separation tank, the output end of the disc oil removing machine is connected with a cooling tower, and the cooling tower is communicated with the input end of the bundling machine through a pipeline filter.
2. The hot rolling sludge treatment system according to claim 1, wherein the rare earth magnetic disc separation and purification equipment comprises a rare earth magnetic disc machine, a dosing device and a magnetic pressing dehydrator, and the magnetic pressing dehydrator comprises a transmission system, a dehydration system, a slag inlet and outlet system and a frame.
3. A hot rolling sludge treatment system according to any one of claims 1 to 2, wherein the iron oxide skin ditch conveys the hot rolling sludge to a cyclone sedimentation tank through a runner for preliminary sedimentation and layering; the water at the upper layer is pressurized and reflows to the flow channel through the pump, the muddy water at the lower layer is sent to the tubular mixer through the lift pump set, and the water treatment agent is added into the tubular mixer by the adding device to generate flocculation reaction.
4. The hot rolling sludge treatment system according to claim 3, wherein the tubular mixer sends the reacted sludge water to the rare earth magnetic disc machine, the rare earth magnetic disc machine separates out flocculated groups in the sludge water and discharges the separated flocculated groups to the magnetic force squeezing dehydrator, and the magnetic force squeezing dehydrator is used for continuously dehydrating the flocculated groups.
5. The hot-rolling sludge treatment system according to claim 4, wherein the rare earth magnetic disk machine sends the treated sludge water to an advection oil interceptor through a slag inlet and outlet system, and a plurality of disc type floatation reclaimers are arranged at a water outlet of the advection oil interceptor and are used for removing floating oil in the sludge water.
6. The hot rolling sludge treatment system according to claim 5, wherein the advection oil separation tank sends the deoiled muddy water to a cooling water tower for cooling, and the cooled muddy water is transported to a pipeline filter through a circulating pump for filtering to form circulating water.
7. The hot rolling sludge treatment system according to claim 6, wherein the horizontal screw centrifuge comprises a screw body, a rotary drum and a screw blade, the bottom sludge of the advection oil separation tank enters the rotary drum through the screw body for centrifugation, and the screw blade scrapes off and discharges the bottom sludge deposited on the inner wall of the rotary drum after centrifugation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211586452.3A CN115784562A (en) | 2022-12-09 | 2022-12-09 | Hot rolling sludge treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211586452.3A CN115784562A (en) | 2022-12-09 | 2022-12-09 | Hot rolling sludge treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115784562A true CN115784562A (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211586452.3A Pending CN115784562A (en) | 2022-12-09 | 2022-12-09 | Hot rolling sludge treatment system |
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| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2903032Y (en) * | 2005-12-27 | 2007-05-23 | 首钢总公司 | Hot rolling circulating waste water treating apparatus |
| CN201254508Y (en) * | 2008-06-19 | 2009-06-10 | 中冶南方工程技术有限公司 | Hot rolling sludge rare-earth magnetic disc treatment device |
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2022
- 2022-12-09 CN CN202211586452.3A patent/CN115784562A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2903032Y (en) * | 2005-12-27 | 2007-05-23 | 首钢总公司 | Hot rolling circulating waste water treating apparatus |
| CN201254508Y (en) * | 2008-06-19 | 2009-06-10 | 中冶南方工程技术有限公司 | Hot rolling sludge rare-earth magnetic disc treatment device |
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