CN111908571A - Magnetic separation equipment for separating nano particles from chromium in chromium-containing wastewater - Google Patents
Magnetic separation equipment for separating nano particles from chromium in chromium-containing wastewater Download PDFInfo
- Publication number
- CN111908571A CN111908571A CN202010902046.8A CN202010902046A CN111908571A CN 111908571 A CN111908571 A CN 111908571A CN 202010902046 A CN202010902046 A CN 202010902046A CN 111908571 A CN111908571 A CN 111908571A
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- magnetic
- chromium
- mud scraper
- containing wastewater
- mud
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/481—Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
A magnetic separation device for separating nano particles from chromium in chromium-containing wastewater comprises a frame assembly (1), a magnetic rod group (2) and a device shell (3), wherein the device shell (3) is fixedly installed on the frame assembly (1), the magnetic rod group (2) is arranged in the device shell (3), a mud scraper (10) is also arranged in the device shell (3), the mud scraper (10) is provided with a plurality of through holes with the same number as that of the magnetic rods of the magnetic rod group (2), the magnetic rod group (2) penetrates through the through holes of the mud scraper (10), and the upper end of the magnetic rod group (2) is connected to the upper end face of the device shell (3); the invention can realize the high-efficiency adsorption, collection and long-term stable operation of the magnetic nanoparticles and the chromium conjugates in the wastewater.
Description
Technical Field
The invention discloses magnetic separation equipment for separating nano particles from chromium in chromium-containing wastewater, relates to the field of wastewater treatment, and particularly relates to purification of chromium-containing wastewater.
Technical Field
The magnetic separation equipment is a main separation device for treating chromium-containing wastewater by applying a magnetic separation technology to magnetic nanoparticles, and has the principle that the magnetic nanoparticles are combined with chromium ions to form magnetic chromium mud, chromium-containing wastewater mixed with the magnetic nanoparticles flows through a magnetic field in a magnetic rod of the magnetic separation equipment, magnetic nanoparticles and chromium combined substances (sludge for short) in the wastewater are adsorbed to the magnetic rod, the sludge adsorbed to the magnetic rod is scraped to the bottom by a mud scraper device of the separation equipment for collection, and the sludge is discharged by a conveying device, so that the aim of treating the chromium-containing wastewater is fulfilled. However, the chromium in the chromium-containing wastewater can not be completely treated in the prior art, so the treated wastewater still contains chromium.
Disclosure of Invention
The invention aims to provide magnetic separation equipment for separating nano particles from chromium in chromium-containing wastewater, so as to overcome the defect that chromium in the chromium-containing wastewater cannot be completely treated in the prior art.
A magnetic separation device for separating nano particles from chromium in chromium-containing wastewater comprises a frame assembly 1, a magnetic rod group 2 and a device shell 3, wherein the device shell 3 is fixedly installed on the frame assembly 1, the magnetic rod group 2 is arranged in the device shell 3, a mud scraper 10 is also arranged in the device shell 3, the mud scraper 10 is provided with a plurality of through holes with the same number as that of the magnetic rods of the magnetic rod group 2, the magnetic rod group 2 penetrates through the through holes of the mud scraper 10, and the upper end of the magnetic rod group 2 is connected to the upper end face of the device shell 3; the mud scraper 10 is also provided with a hole which is connected with a mud scraper driving screw rod 13, the mud scraper driving screw rod 13 extends out of the through hole on the upper end surface of the equipment shell 3, and the mud scraper driving screw rod 13 is connected with the through hole on the upper end surface of the equipment shell 3 in a sealing and sliding way; the device is characterized in that the mud scraper driving screw 13 is connected with a mud scraper driving system 12; the lower part of the equipment shell 3 is provided with a water tank and a sludge tank 9, the water tank and the sludge tank 9 are provided with a chromium-containing wastewater inlet 8, a sludge discharge port 6 and a bottom stirrer 7, and the side wall of the upper part of the equipment shell 3 is provided with a clear water outlet 11; the mud scraper 10 is a circular plate, the sizes of the through holes are the same, the distances between the adjacent through holes are equal, the magnetic bar group 2 comprises a plurality of completely same magnetic bars 21, the distances between the adjacent magnetic bars 21 are the same, and the magnetic bars are matched with the through holes in the mud scraper 10.
The magnetic separation equipment for separating the nano particles from the chromium in the chromium-containing wastewater is characterized in that an observation window 4 is arranged on an equipment shell 3.
The magnetic separation equipment for separating the nano particles from the chromium in the chromium-containing wastewater is characterized in that a washing water inlet 5 is also arranged on a water tank and a sludge tank 9.
The invention has the technical advantages that:
1. the shell of the magnetic separator is changed into a round structure from the original rectangular structure, so that dead zones of the chromium-containing wastewater flowing in the magnetic separator are reduced, and the chromium-containing sludge is prevented from being accumulated and enriched on the shell; and the circular structure also makes the mud scraping device more evenly stressed, and improves the mud scraping efficiency.
2. The magnetic rod groups are changed from the original integral rectangular arrangement into the integral circular arrangement, so that the magnetic rods are better in distribution effect, and the magnetic field is more uniformly distributed; the arrangement of the magnetic rods and the design of equal spacing can ensure that the adsorption effect meets the requirements of relevant standards.
3. The design of the mud scraping device and the selection of the mud scraping plate material ensure that the mud scraping process is not blocked, and the mud scraping plate moves stably and is stressed uniformly in the up-and-down movement process.
4. The invention can realize the high-efficiency adsorption, collection and long-term stable operation of the magnetic nanoparticles and the chromium conjugates in the wastewater.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a partial sectional view taken along line A-A of FIG. 1;
fig. 3 is an appearance schematic diagram of the present invention.
The device comprises a frame assembly 1, a magnetic rod group 2, an equipment shell 3, an observation hole 4, a flushing water inlet 5, a sludge discharge port 6, a bottom stirrer 7, a chromium-containing wastewater inlet 8, a water tank and a sludge tank 9, a mud scraper 10, a clear water outlet 11, a mud scraper driving system 12, a mud scraper driving screw 13 and a magnetic rod 21.
Detailed Description
The invention as shown in fig. 1 and fig. 2 comprises a frame assembly 1, a magnetic rod group 2 and an equipment shell 3, wherein the equipment shell 3 is fixedly arranged on the frame assembly 1, the magnetic rod group 2 is arranged in the equipment shell 3, a mud scraper 10 is also arranged in the equipment shell 3, the mud scraper 10 is provided with a plurality of through holes with the same number as that of the magnetic rods of the magnetic rod group 2, the magnetic rod group 2 passes through the through holes of the mud scraper 10, and the upper end of the magnetic rod group 2 is connected on the upper end surface of the equipment shell 3; the mud scraper 10 is also provided with a hole which is connected with a mud scraper driving screw rod 13, the mud scraper driving screw rod 13 extends out of the through hole on the upper end surface of the equipment shell 3, and the mud scraper driving screw rod 13 is connected with the through hole on the upper end surface of the equipment shell 3 in a sealing and sliding way; the device is characterized in that the mud scraper driving screw 13 is connected with the mud scraper driving system 12; the lower part of the equipment shell 3 is provided with a water tank and a sludge tank 9, the water tank and the sludge tank 9 are provided with a chromium-containing wastewater inlet 8, a sludge discharge port 6 and a bottom stirrer 7, and the side wall of the upper part of the equipment shell 3 is provided with a clear water outlet 11; the mud scraper 10 is a circular plate, the sizes of the through holes are the same, the distances between the adjacent through holes are equal, the magnetic bar group 2 is composed of a plurality of magnetic bars 21 with the same size, the distances between the adjacent magnetic bars 21 are the same, and the magnetic bars are matched with the through holes in the mud scraper 10.
The magnetic separation equipment for separating the nano particles from the chromium in the chromium-containing wastewater is characterized in that an observation window 4 is arranged on an equipment shell 3.
The magnetic separation equipment for separating the nano particles from the chromium in the chromium-containing wastewater is characterized in that a washing water inlet 5 is also arranged on a water tank and a sludge tank 9.
The specific design scheme is as follows:
a magnetic separation device for separating nano particles and chromium in chromium-containing wastewater comprises a frame assembly 1/2, a magnetic rod group 3, a device shell 4, an observation hole 5, a washing water inlet 6, a sludge discharge port 7, a bottom stirrer 8, a chromium-containing wastewater inlet 9, a water tank and a sludge tank 10, a sludge scraping system 11, a clear water outlet 12, a sludge scraping plate driving system 13 and a sludge scraping plate driving screw rod part (shown in figure 1).
1) Frame combination: the frame is formed by welding rectangular stainless steel pipes in a splicing manner and is a main supporting mechanism of the equipment.
2) A magnetic rod group: the main function is to adsorb magnetic nano particles and chromium combination in the wastewater into the magnetic rod, thereby achieving the effect of purifying the wastewater, and the magnetic rod group is integrally arranged into a circular arrangement, so that the distribution effect of the magnetic rod is better and the distribution of the magnetic field is more uniform. The bar magnet group comprises 447 bar magnets, single bar magnet length 1.5M, bar magnet effective length 1.44M, single bar magnet is straight through phi 22mm, the bar magnet interval is arranged, single bar magnet becomes equilateral triangle with 2 adjacent bar magnets of homonymy, satisfies adjacent bar magnet interval and is not more than 25 mm's designing requirement, and the M8 screw hole is left to the bar magnet bottom, can with frame bar magnet installation locating plate fixed connection.
3) The equipment shell: the device consists of a magnetic separator shell, a bottom magnetic rod installation positioning plate, an upper magnetic rod guide plate and the like, wherein the shell is cylindrical, so that the flowing dead angle and dead zone are reduced in the process of flowing wastewater, and the accumulation of chromium-containing sludge in the dead zone is avoided; the magnetic rod mounting and positioning plate is provided with a mounting hole and a positioning hole for the magnetic rod, and a mud dredging groove is formed in the magnetic rod mounting and positioning plate and used for allowing mud scraped from the magnetic rod to flow into the water tank through the mud dredging groove; the magnetic bar guide plate provides guidance for magnetic bar installation and a magnetic bar upper part positioning reference.
4) And (4) observation holes: the observation hole is mainly made of organic glass and is fixed on the shell of the magnetic separator by adopting bolt connection and is used for observing the state of magnetic chromium mud adsorption in the operation of the magnetic separator and the like.
5) A washing water inlet: a seamless stainless steel pipe adopting DN20 is connected with a bottom water tank, and after the mud scraping is finished by a mud scraping plate, flushing water is opened to finish the dilution and mixing of the magnetic chromium mud in the water tank, so that the separation and discharge of the magnetic chromium mud are facilitated.
6) A sludge discharge port: a seamless stainless steel pipe of DN20 is connected with the bottom water tank, and sludge scraped in the sludge scraping process is discharged and collected from a sludge discharge port.
7) A bottom stirrer: the device consists of a driving motor, a speed reducer and a stirring paddle, and is used for uniformly mixing magnetic nanoparticles collected by a mud scraping device, a chromium combination and clear water, preventing the scraped sludge from being accumulated and agglomerated and facilitating the discharge of the sludge. The stirrer adopts a bottom-in turbine stirrer, the rotating speed is selected to be n ═ 100rpm, the output power of the power motor is selected to be 1.5KW, and the stirring force is ensured to flush the chromium-containing sludge on the positioning plate into the water tank.
8) A water inlet of chromium-containing wastewater: a seamless stainless steel pipe of DN20 is connected with the bottom water tank, when the magnetic separator operates, the chromium-containing wastewater is pumped into the water inlet tank through the water inlet, and along with the continuous pumping of the chromium-containing wastewater, the chromium-containing wastewater flows to the magnetic bar group from the water tank to complete the adsorption separation of the magnetic chromium mud.
9) Water tank/sludge tank: the container for containing chromium-containing wastewater and sludge is provided with a chromium-containing wastewater inlet, a flushing water inlet, a sludge discharge port, a liquid level sensor mounting port and the like, the chromium-containing wastewater is used as a water tank in the stage of completing the adsorption and separation of the chromium-containing wastewater, the chromium-containing wastewater is stopped to be fed after the magnetic bar group is fully adsorbed, the sludge discharge port is opened, the magnetic chromium sludge on the magnetic bar group is scraped by the sludge scraping plate, and the scraped magnetic chromium sludge is collected as a sludge tank and discharged out of the equipment through the sludge discharge port.
10) A mud scraping system: the sludge scraping system consists of a sludge scraping device and a driving device, and is used for scraping magnetic nano particles and chromium combination (sludge for short) adsorbed on a magnetic rod into a bottom sludge box for collection. The mud scraping device adopts a structure that 5mm polytetrafluoroethylene plates are added in the middle of upper and lower double-layer stainless steel plates with the thickness of 10mm, the size of the opening on the upper and lower clamping plates and the gap between the magnetic rods are unilateral 1.5mm, and the mud scraping device is not contacted with the magnetic rods in the motion process. The diameter of a mud scraping hole of the polytetrafluoroethylene plate is not more than 22.5 mm; the upper and lower double-layer stainless steel plates of the mud scraping device and the middle polytetrafluoroethylene plate are changed into a circular structure from an original rectangular structure, so that the gap unevenness between the mud scraping plate and the magnetic separator shell can be reduced in the mud scraping process, the mud scraping plate is more uniform in stress, and the mud scraping effect is more excellent.
11) Clear water outlet: the water outlet is arranged at the top of the magnetic separator and is connected by adopting a seamless stainless steel pipe of DN20, and after the magnetic chromium mud adsorption of the chromium-containing wastewater is completed by the magnetic separator, the clear water is discharged from the device through a clear water outlet at the top.
12) Mud scraper actuating system: the driving system mainly has the function of driving the mud scraping device to reciprocate up and down; the device consists of a motor, a speed reducer, 3 commutators, 4 synchronous elevators, a bush, a connecting rod, a coupling and the like. After the motor is started, the four lifting mechanisms drive the mud scraping device to synchronously move, and the mud scraping device is uniformly stressed and stably operated in the moving process; meanwhile, the mud scraping device adopts a floating mechanism, and in the movement process, the mud scraping plate can move slightly in the radial direction of the magnetic rod, so that the friction force caused by large part of tolerance is eliminated; the material of the mud scraping plate is a non-metal material with small friction and high strength, so that the mud scraping process is stable and free from clamping stagnation.
13) The mud scraper drives a screw: four driving screw rods form a four-shaft linkage lifting mechanism of the mud scraping device, so that the mud scraping plate moves up and down in the mud scraping process, and is stressed uniformly and stably.
The main process flow is as follows:
1) chromium-containing wastewater (containing magnetic nanoparticles and uniformly mixed with the magnetic nanoparticles) enters the magnetic separator from the water inlet of the bottom water tank, the wastewater flows through the magnetic rod group, the magnetic nanoparticles and the chromium combination are adsorbed by the magnetic rods, and the separated wastewater flows out after being buffered by the upper water outlet.
2) When the magnetic rod is fully absorbed with the combination of magnetic nano-particles and chromium, the system stops water feeding, discharges waste water in the magnetic separator from the sludge discharge port of the water tank, opens the water cleaning port, and stops when the liquid level reaches a certain position at the upper part of the water tank.
3) The driving motor drives the mud scraping device to scrape the mud on the magnetic rod to the bottom, and simultaneously, the stirrer is started to stir the mud into the bottom water tank and discharge the mud from a mud discharge port of the water tank.
4) And lifting the mud scraping device to the initial position of the top, closing the mud discharging port, opening the waste water inlet, and repeating the above processes.
Claims (3)
1. A magnetic separation device for separating nano particles from chromium in chromium-containing wastewater comprises a frame assembly (1), a magnetic rod group (2) and a device shell (3), wherein the device shell (3) is fixedly installed on the frame assembly (1), the magnetic rod group (2) is arranged in the device shell (3), a mud scraper (10) is also arranged in the device shell (3), the mud scraper (10) is provided with a plurality of through holes with the same number as that of the magnetic rods of the magnetic rod group (2), the magnetic rod group (2) penetrates through the through holes of the mud scraper (10), and the upper end of the magnetic rod group (2) is connected to the upper end face of the device shell (3); the mud scraper (10) is also provided with a hole which is connected with a mud scraper driving lead screw (13), the mud scraper driving lead screw (13) extends out of the through hole on the upper end surface of the equipment shell (3), and the mud scraper driving lead screw (13) is in sealed sliding connection with the through hole on the upper end surface of the equipment shell (3); the device is characterized in that the mud scraper driving screw rod (13) is connected with a mud scraper driving system (12); a water tank and a sludge tank (9) are arranged at the lower part of the equipment shell (3), a chromium-containing wastewater inlet (8), a sludge discharge port (6) and a bottom stirrer (7) are arranged on the water tank and the sludge tank (9), and a clear water outlet (11) is arranged on the side wall of the upper part of the equipment shell (3); the mud scraper (10) is a circular plate, the sizes of the through holes are the same, the distances between the adjacent through holes are equal, the magnetic bar group (2) comprises a plurality of completely same magnetic bars (21), the distances between the adjacent magnetic bars (21) are the same, and the magnetic bars are matched with the through holes in the mud scraper (10).
2. A magnetic separation device for separating chromium from nano-particles in chromium-containing wastewater according to claim 1, characterized in that a viewing window (4) is provided in the device housing (3).
3. A magnetic separation device for separating chromium from nano-particles in chromium-containing wastewater according to claim 1 or 2, characterized in that a flushing water inlet (5) is also provided on the water tank and the sludge tank (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902046.8A CN111908571A (en) | 2020-09-01 | 2020-09-01 | Magnetic separation equipment for separating nano particles from chromium in chromium-containing wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902046.8A CN111908571A (en) | 2020-09-01 | 2020-09-01 | Magnetic separation equipment for separating nano particles from chromium in chromium-containing wastewater |
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| CN111908571A true CN111908571A (en) | 2020-11-10 |
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| CN202010902046.8A Pending CN111908571A (en) | 2020-09-01 | 2020-09-01 | Magnetic separation equipment for separating nano particles from chromium in chromium-containing wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374588A (en) * | 2020-11-11 | 2021-02-19 | 北京新风航天装备有限公司 | Magnetic separation equipment for separating nano particles from chromium in wastewater |
| CN113149160A (en) * | 2020-12-30 | 2021-07-23 | 东营雅努斯新材料科技有限公司 | Skid-mounted oily sewage treatment device and method |
| CN115159640A (en) * | 2022-06-02 | 2022-10-11 | 中建环能科技股份有限公司 | Water body purifying equipment |
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| CN113149160A (en) * | 2020-12-30 | 2021-07-23 | 东营雅努斯新材料科技有限公司 | Skid-mounted oily sewage treatment device and method |
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Address after: 100854 No. 52, Yongding Road, Beijing, Haidian District Applicant after: Beijing Xinfeng Aerospace Equipment Co.,Ltd. Address before: 100854 No. 52, Yongding Road, Beijing, Haidian District Applicant before: BEIJING HANGTIAN XINFENG MECHANICAL EQUIPMENT Co.,Ltd. |
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Application publication date: 20201110 |