CN112028342A - Converter steel slag hot-stewing turbid circulating water treatment device and process - Google Patents
Converter steel slag hot-stewing turbid circulating water treatment device and process Download PDFInfo
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- CN112028342A CN112028342A CN202011024766.5A CN202011024766A CN112028342A CN 112028342 A CN112028342 A CN 112028342A CN 202011024766 A CN202011024766 A CN 202011024766A CN 112028342 A CN112028342 A CN 112028342A
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- 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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
Abstract
The invention belongs to the field of turbid circulating water treatment, and relates to a converter steel slag hot-stewing turbid circulating water treatment device and a converter steel slag hot-stewing turbid circulating water treatment process. The invention adopts the process of combining the water return tank, the water distribution flow groove and the inclined plate precipitator, integrates coagulation, precipitation and mechanical sludge discharge, efficiently removes suspended substances in the return water and improves the circulation rate. The invention has obvious advantages in the aspects of shortening the construction period, reducing the occupied land, controlling the operation and managing the operation, simultaneously saves the engineering investment, and is suitable for the newly-built and improved projects of the converter steel slag hot-stewed turbid circulating water treatment system.
Description
Technical Field
The invention belongs to the field of turbid circulating water treatment, and relates to a device and a process for treating converter steel slag hot-stewed turbid circulating water.
Background
The converter steel slag hot-stewing slag turbid circulating water treatment mainly comprises the steps of collecting return water of converter steel slag rolling crushing water, return water of steel slag hot-stewing water and return water of water for a rolling dust removal system, then removing suspended matters, and sending the treated water to a user for recycling. And the generated sludge dewatering machine is used for processing, and the generated sludge cake is conveyed to a steel slag secondary processing area for processing. The steel slag hot pressing and stewing process includes two steps of rolling crushing and hot pressing and stewing. The rolling and crushing operation process is mainly used for rapidly cooling and crushing the molten steel slag. The molten steel slag is crushed for multiple times by a rolling bed and a crusher, water spraying and cooling are alternately performed, the temperature of the molten steel slag is cooled from 1600 ℃ to about 600 ℃, and the granularity of the molten steel slag is crushed to be less than 300 mm. The hot braising procedure is mainly to braise the solid steel slag in a can with a cover by spraying water and cooling to the condition of slag discharge. The rolling and crushing production line is provided with a ventilation and dust removal system, dust-containing steam is timely extracted and is purified by a spray tower, a dehydrator and a wet electric precipitator and then discharged outside. The evaporation capacity of water used in each process is large, about-30% of water returns to the water return tank, the water return temperature is high, the content of suspended matters is large, the PH is alkaline, and the water cannot be directly recycled.
The general treatment process of the hot-stewed turbid circulating water comprises the following steps: and the hot stuffy water of the hot stuffy tank and the return water of the production water of the rolling area respectively enter the water return well. Water for the rolling dust removal system firstly enters a pre-settling tank, and effluent treated by the pre-settling tank enters a water return well. And pumping the backwater in each backwater well into a radial flow sedimentation tank by using a backwater pump, precipitating the backwater, and then discharging the water which flows into the turbid ring water suction well, and pumping the water to each water using point by using a lifting pump. Sludge in the radial flow sedimentation tank is scraped to a mud bucket by a mud scraper, is pumped to a sludge storage tank through a slurry pump, is pumped to a filter press through a filter press feed pump for treatment, and the generated mud cake is transported to a secondary treatment transfer storage yard. The radial flow sedimentation tank has the advantages of small surface load, large occupied area, high construction requirement and long construction period. In addition, the sludge discharge port of the radial flow sedimentation tank is lower, the sludge can enter a filter press for dehydration only through two-stage lifting, the flow of sludge treatment is long, and the operation amount of workers is large.
Disclosure of Invention
In view of the above, the invention aims to provide a device and a process for treating converter steel slag hot-stewed turbid circulating water, wherein an inclined plate precipitator is used as a core process for removing suspended matters in turbid circulating water, and PAC and PAM are added to efficiently remove suspended matters in return water.
In order to achieve the purpose, the invention provides the following technical scheme:
a converter steel slag hot-stewing turbid circulating water treatment device comprises a first water return tank and a second water return tank which are arranged in parallel, wherein the first water return tank is used for collecting water sprayed by a hot-stewing slag tank and water sprayed by a rolling crushing device, and the second water return tank is used for collecting water used by a spray tower and a dehydrator; the first water return tank is connected to the inclined plate precipitator through a water distribution flow groove, and the inclined plate precipitator returns to the first water return tank through the turbid circulating water tank; and the second water return tank passes through the pre-settling tank and then is connected in parallel to the inclined plate precipitator, and then flows back to the second water return tank through the turbid circulating water tank.
Optionally, still including setting up the mud recovery system between inclined plate settler and first pond of returning, mud recovery system is connected to the sludge dewaterer including the spiral mud conveyor, mud equalizing basin, the thick liquid sediment pump that connect gradually, collects the precipitate of inclined plate settler through the spiral mud conveyor, produces the mud cake by the sludge dewaterer.
Optionally, the slurry adjusting tank is communicated with the first water return tank to collect supernatant of the slurry adjusting tank.
Optionally, the water sprayed by the hot-stewing slag pot and the water sprayed by the rolling crushing are respectively and independently recovered, and the first water returning tank comprises two independently arranged water returning sub-tanks; water sprayed from the hot stewing slag tank flows back to one of the backwater sub-tanks through a hot stewing water supply pump and a pipeline self-cleaning filter; the water sprayed by the rolling crushing is returned to the other water return sub-tank through a rolling water supply pump and a pipeline self-cleaning filter; and water for the spray tower and the dehydrator flows back to the second water return tank through a wet electric dedusting water supply pump and a pipeline self-cleaning filter.
Optionally, the system also comprises a new water pipeline for introducing new water into the turbid circulating water tank and a waste water pipeline for discharging waste water in the turbid circulating water tank.
Optionally, the first water return tank and the second water return tank are respectively and independently communicated to the water distribution flow groove through a connecting pump.
Optionally, concrete is added by a pipeline mixer at the position of a main pipe where the lifting pump is connected to the water distribution chute, and a flocculating agent is added at the water distribution chute through a dosing device.
Optionally, the inclined plate settler comprises at least one or more of the following features,
A1) the inclined plate precipitator is a shaping steel device and consists of a water inlet flow groove, a guide plate, a precipitation area, an inclined plate, a clear water area, a water outlet weir plate, a water outlet flow groove, a mud bucket and a spiral mud conveyor;
A2) the inclined plate precipitator has the functions of precipitation and sludge concentration;
A3) the design surface load of the inclined plate precipitator is 3.0m3/(㎡.h)～4m3/(㎡.h)；
A4) The solid content of the sludge discharged from the bottom of the inclined plate precipitator can reach 2 percent, and the sludge can be directly dewatered and dried by a dewatering machine without being concentrated again;
A5) filtrate of the dehydrator and supernatant of the sludge adjusting tank can automatically flow into the water returning tank;
A6) the water inlet suspended matter of the inclined plate precipitator can reach 5000 mg/l;
A7) the suspended substance of the effluent after the treatment of the inclined plate precipitator is less than or equal to 50 mg/l.
A process for treating the hot-stewed turbid circulating water of converter steel slag includes collecting the water used by spray tower and dehydrator, and pre-settling; collecting hot slag stewing tank water spray, rolling, crushing and water spray, collecting, performing precipitation treatment on collected sewage by adopting an inclined plate precipitator, and conveying supernate back to each water consumption point for recycling; and dewatering the precipitated slurry to form a sludge cake, and refluxing filtrate separated from the slurry to sewage before or after collection.
Optionally, fresh water is added to the supernatant to ensure the total water volume and to keep the water temperature below 35 ℃.
Optionally, concrete and a flocculating agent are added into the collected sewage.
The invention has the beneficial effects that:
1. the inclined plate precipitator has high precipitation efficiency, can efficiently remove suspended substances in return water, and greatly reduces the blockage of pipelines and user nozzles, and the concentration of the suspended substances in the outlet water is less than or equal to 50 mg/l.
2. The inclined plate precipitator is designed to have surface load 2-3 times higher than that of a common horizontal flow sedimentation tank and a common radial flow sedimentation tank, and the floor area is greatly reduced.
3. The inclined plate precipitator integrates precipitation, sludge concentration and automatic sludge discharge, shortens the sludge treatment process and greatly reduces the operation intensity of workers.
4. The inclined plate precipitator is of an all-steel structure, main components can be produced and assembled in a factory, and the inclined plate precipitator only needs to be integrally positioned on site, so that the construction difficulty and the construction period are greatly reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to FIG. 1, the reference numbers in the drawings denote: the device comprises a turbid ring water tank 1, a wet electric dust removal water supply pump 2, a rolling water supply pump 3, a hot stewing water supply pump 4, a pipeline self-cleaning filter 5, hot stewing slag tank water spray A1, rolling crushing water spray A2, spray tower and dehydrator water B, a first water return tank 6, a pre-settling tank 7, a second water return tank 8, a lifting pump 9, a water distribution flow groove 10, a dosing device 11, an inclined plate precipitator 12, a spiral mud conveyor 13, a mud adjusting tank 14, a slag slurry pump 15 and a sludge dehydrator 16.
The process flow for treating the hot-stewed turbid circulating water of the converter steel slag provided by the invention is as follows: the backwater A composed of the water for rolling and crushing the steel slag of the converter (water spray for rolling and crushing) A2 and the backwater of the water for hot braising of the steel slag (water spray for hot braising tank) A1 enters the first backwater tank 6. The return water (for spray tower and dehydrator) B for the rolling dust removal system firstly enters the pre-settling tank 7, and the outlet water treated by the pre-settling tank 7 enters the second return water tank 8. The backwater in each backwater pool is pressurized and conveyed into a water distribution flow groove 10 by a lift pump 9 and then enters an inclined plate precipitator 12 for treatment, and the supernatant of the inclined plate precipitator 12 automatically flows into a turbid circulating water pool 1 and is conveyed to each water using point for recycling by a pump through a pipeline self-cleaning filter 5. The lost water quantity of evaporation, leakage, sludge removal and the like in the system is supplemented by new water or recycled water produced by the whole plant. The sludge precipitated by the inclined plate precipitator 12 is delivered to a slurry adjusting tank 14 through a spiral sludge conveyor 13, and then is pumped to a sludge dewatering machine 16 through a slurry pump 15 for treatment, and the generated sludge cake is transported to a steel slag secondary treatment area for treatment. The filtrate of the sludge dewatering machine 16 and the supernatant of the slurry adjusting tank 14 automatically flow to a water return tank for retreatment.
The water in the backwater A is directly contacted with the steel slag in the using process, the backwater is pressureless and contains steel slag particles, the content of suspended matters is 800mg/L, the water temperature is less than or equal to 90 ℃, and the PH is 9-12. And (3) directly contacting the water in the return water B with a product in the using process, wherein the return water is free of pressure, the content of suspended matters in the return water is 5600mg/L, the water temperature is less than 60 ℃, and the pH is 8-10. The return water A and the return water B have a longer position difference on the process plane arrangement, and a return water pool and a return water pump are required to be respectively arranged. The content of suspended matters in the backwater B is extremely high, pre-sedimentation treatment is required to remove large suspended matters, and the designed retention time of the pre-sedimentation tank 7 is 2-5 min.
Concrete (PAC) is added into a water outlet main pipe of each water return pool lifting pump 9 by a pipeline mixer, and flocculating agent (PAM) is added into a water distribution launder 10.
The inclined plate settler 12 has the following features.
A1) The inclined plate precipitator 12 is a shaping steel device and consists of a water inlet flow groove, a guide plate, a precipitation area, an inclined plate, a clear water area, a water outlet weir plate, a water outlet flow groove, a mud bucket and a spiral mud conveyor 13;
A2) the inclined plate precipitator 12 has the functions of precipitation and sludge concentration;
A3) the design surface load of the inclined plate precipitator 12 is 3.0m3/(㎡.h)～4m3/(㎡.h)；
A4) The solid content of the sludge discharged from the bottom of the inclined plate precipitator 12 can reach 2 percent, and the sludge can be directly dewatered and dried by a dewatering machine without being concentrated again;
A5) filtrate of the dehydrator and supernatant of the sludge adjusting tank can automatically flow into the water returning tank;
A6) the water inlet suspended matter of the inclined plate precipitator 12 can reach 5000 mg/l;
A7) the suspended substance of the effluent after the treatment of the inclined plate precipitator 12 is less than or equal to 50 mg/l.
FIG. 1 shows a process flow diagram of a converter steel slag hot-braising turbid circulating water treatment process, which comprises a water return tank (containing a pre-settling tank 7), a plurality of lift pumps 9, a water distribution chute 10, a chemical feeding device 11, an inclined plate precipitator 12, a turbid circulating water tank 1 and a plurality of water supply pumps which are connected in sequence, wherein the water return tank comprises a wet electric dust removal water supply pump 2, a rolling water supply pump 3, a hot-braising water supply pump 4, a sludge regulating tank, a slurry pump 15 and a sludge dewatering machine 16.
The specific steps of the converter steel slag hot-stewed turbid circulating water treatment by adopting the process flow comprise:
1) a water return tank (containing a pre-settling tank 7): the water used by the user is polluted, the pressure is changed into non-pressure, the return water automatically flows into the return water tank through the drainage ditch, and is lifted to the next-stage structure for treatment by the submerged slurry pump 15. In order to reduce the length of the drainage ditch and the depth of the water return pool, the water return pool is respectively arranged near the user. Because the water that wet-type electrostatic precipitator system spray tower, dehydration tower used contains a large amount of suspended solids, in order to reduce the subsequent processing degree of difficulty, ensure the steady operation of subsequent processing, to the return water after each user of wet-type electrostatic precipitator used, need set up preliminary sedimentation tank 7, get rid of the suspended substance of large granule in the dust pelletizing system return water, 7 dwell times of preliminary sedimentation tank are 2min ~ 5 min.
2) A water distribution chute 10: the water distribution flow groove 10 receives water discharged by each water return pool lifting pump 9, homogenizes and equalizes the return water, and changes the water flow speed through reduction and expansion of the flow groove section, so that the effect of fully mixing the medicament and the return water is achieved. The main runner and the branch runner connecting each inclined plate precipitator 12 are provided with gate valves so as to adjust the inflow of each inclined plate precipitator 12. The step is mainly to receive the backwater of different water quality, distribute the backwater of different water quality to each inclined plate precipitator 12 after the backwater of different water quality is uniformly mixed in the main runner, and fully mix the added PAC and PAM to play the role of the medicament.
3) Inclined plate precipitator 12: the inclined plate precipitator 12 is made of steel and is produced by equipment manufacturers in a set. Mainly comprises a water inlet flow groove, a guide plate, a settling zone, an inclined plate, a clear water zone, a water outlet weir plate, a water outlet flow groove, a mud bucket and a spiral mud conveyor 13. The step is mainly a core step for separating muddy water, and redundant suspended substances are removed by the step. The design surface load of the inclined plate precipitator 12 can reach 3.0m3/(㎡.h)～4m3And (h) square meter, the precipitation efficiency is greatly improved. The adaptation range of the water inlet of the inclined plate precipitator 12 to suspended matters is wide, and the maximum adaptation range can reach 5000 mg/l. The effluent can reach suspended matter less than or equal to 50mg/l, which is far lower than the requirement of water for hot-stewed turbid circulating water in each process (the suspended matter of hot-stewed circulating water is less than or equal to 100 mg/l). Meanwhile, the design of the inclined plate precipitator 12 mud bucket is large, so that the mud has a concentration effect in the mud bucket, and the solid content of the mud at the bottom is further improved. The spiral mud conveyor 13 is arranged at the bottom of the mud bucket, so that the unsmooth mud discharge caused by hardening of the mud at the bottom of the mud bucket is avoided.
4) A sludge adjusting tank: the mud adjusting tank receives the row mud of inclined plate precipitator 12, lets the row mud of different inclined plate precipitators 12, the different periods of unified inclined plate precipitator 12 average value at this, and the compression time that the mud of avoiding beating into the pressure filter caused because of the moisture content is inconsistent is different. The slurry conditioning tank 14 is provided with a stirrer to prevent bottom slurry from settling.
5) Sludge dewatering machine 16: the sludge dewatering machine 16 further dewaters and dries the sludge in the slurry adjusting tank 14, so as to achieve the purposes of reducing the volume of the sludge and facilitating transportation.
Example 1
By adopting the process flow shown in figure 1, water A1 sprayed from the hot-stewed slag pot and water A2 sprayed from the rolled crushing pot automatically flow into respective water return tanks through drainage ditches. The water B for the spray tower and the dehydrator firstly enters the pre-settling tank 7 through a drainage ditch, and the effluent treated by the pre-settling tank 7 automatically flows into the water return tank. The backwater in each backwater pool is pressurized and conveyed into a water distribution flow groove 10 by a lift pump 9 and then enters an inclined plate precipitator 12 for treatment, and the supernatant of the inclined plate precipitator 12 automatically flows into the turbid circulating water pool 1 and is pumped to each water using point for recycling. The sludge precipitated by the inclined plate precipitator 12 is delivered to a slurry adjusting tank 14 through a spiral sludge conveyor 13, and then is pumped to a sludge dewatering machine 16 through a slurry pump 15 for treatment, and the generated sludge cake is transported to a steel slag secondary treatment area for treatment. The filtrate of the sludge dewatering machine 16 and the supernatant of the slurry adjusting tank 14 automatically flow to a water return tank for retreatment.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The converter steel slag hot-stewing turbid circulating water treatment device is characterized by comprising a first water returning pool and a second water returning pool which are arranged in parallel, wherein the first water returning pool is used for collecting water sprayed by a hot-stewing slag tank and water sprayed by rolling crushing, and the second water returning pool is used for collecting water used by a spray tower and a dehydrator;
the first water return tank is connected to the inclined plate precipitator through a water distribution flow groove, and the inclined plate precipitator returns to the first water return tank through the turbid circulating water tank;
and the second water return tank passes through the pre-settling tank and then is connected in parallel to the inclined plate precipitator, and then flows back to the second water return tank through the turbid circulating water tank.
2. The apparatus for treating water containing converter steel slag thermally-stewed turbid circulating water as claimed in claim 1, further comprising a slurry recovery system arranged between the inclined plate settler and the first water return tank, wherein the slurry recovery system comprises a screw mud conveyor, a slurry adjusting tank and a slurry slag pump which are connected in sequence and connected to a sludge dewatering machine, the screw mud conveyor is used for collecting sediments in the inclined plate settler, and a sludge cake is produced by the sludge dewatering machine.
3. The apparatus for treating hot-stewed circulating water of converter steel slag as claimed in claim 2, wherein the slurry adjusting tank is communicated with the first water return tank to collect the supernatant of the slurry adjusting tank.
4. The apparatus for treating hot-stewed annular water of converter steel slag as claimed in claim 1, wherein the water sprayed from the hot-stewed slag pot and the water sprayed from the rolled crushing pot are separately recovered, and the first water return tank comprises two separately disposed water return sub-tanks; water sprayed from the hot stewing slag tank flows back to one of the backwater sub-tanks through a hot stewing water supply pump and a pipeline self-cleaning filter; the water sprayed by the rolling crushing is returned to the other water return sub-tank through a rolling water supply pump and a pipeline self-cleaning filter; and water for the spray tower and the dehydrator flows back to the second water return tank through a wet electric dedusting water supply pump and a pipeline self-cleaning filter.
5. The apparatus for treating the hot-stewed circulating water of converter steel slag as claimed in claim 1, further comprising a fresh water pipe for introducing fresh water into the turbid circulating water bath and a waste water pipe for discharging waste water from the turbid circulating water bath.
6. The apparatus for treating water containing converter steel slag and hot-stewed turbid circulating water as claimed in claim 1, wherein the first water returning tank and the second water returning tank are independently connected to the water distribution tank through a pump.
7. The apparatus for treating the circulating water produced by thermally braising the converter steel slag according to claim 6, wherein the concrete is fed by a line mixer at a manifold where the lift pump is connected to the distribution chute, and the flocculating agent is fed by a feeding device at the distribution chute.
8. A process for treating the circulating water generated by thermally braising the steel slag of converter features that the water used in spray tower and dewatering device is collected and pre-settled; collecting hot slag stewing tank water spray, rolling, crushing and water spray, collecting, performing precipitation treatment on collected sewage by adopting an inclined plate precipitator, and conveying supernate back to each water consumption point for recycling; and dewatering the precipitated slurry to form a sludge cake, and refluxing filtrate separated from the slurry to sewage before or after collection.
9. The process for treating converter steel slag hot-stewed circulating water as claimed in claim 8, wherein fresh water is added to the supernatant to secure the total water amount and the water temperature is maintained at 35 ℃ or lower.
10. The process for treating hot-stewed circulating water of converter steel slag as claimed in claim 8, wherein concrete and a flocculating agent are added to the collected sewage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011024766.5A CN112028342A (en) | 2020-09-25 | 2020-09-25 | Converter steel slag hot-stewing turbid circulating water treatment device and process |
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| CN202011024766.5A CN112028342A (en) | 2020-09-25 | 2020-09-25 | Converter steel slag hot-stewing turbid circulating water treatment device and process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114291936A (en) * | 2022-01-13 | 2022-04-08 | 中冶南方工程技术有限公司 | Converter hot-stewing slag wastewater treatment system |
| CN115044732A (en) * | 2022-06-20 | 2022-09-13 | 山东莱钢永锋钢铁有限公司 | Turbidity reduction treatment device for dry-method dust removal coal cold water system of converter |
-
2020
- 2020-09-25 CN CN202011024766.5A patent/CN112028342A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114291936A (en) * | 2022-01-13 | 2022-04-08 | 中冶南方工程技术有限公司 | Converter hot-stewing slag wastewater treatment system |
| CN115044732A (en) * | 2022-06-20 | 2022-09-13 | 山东莱钢永锋钢铁有限公司 | Turbidity reduction treatment device for dry-method dust removal coal cold water system of converter |
| CN115044732B (en) * | 2022-06-20 | 2023-08-22 | 山东莱钢永锋钢铁有限公司 | Turbidity reducing treatment device of converter dry dedusting coal cold water system |
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