CN115044732B - Turbidity reducing treatment device of converter dry dedusting coal cold water system - Google Patents
Turbidity reducing treatment device of converter dry dedusting coal cold water system Download PDFInfo
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- CN115044732B CN115044732B CN202210695687.XA CN202210695687A CN115044732B CN 115044732 B CN115044732 B CN 115044732B CN 202210695687 A CN202210695687 A CN 202210695687A CN 115044732 B CN115044732 B CN 115044732B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Filtering Materials (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention belongs to the technical field of converter dry dedusting, and in particular relates to a converter dry dedusting coal cold waterThe system turbidity reducing treatment device. The device comprises a coal cooling tower, an inclined plate sludge pond, a coal cooling water supply pond, a sewage pond, a shallow sand filter, a coal cooling reservoir, an overhead launder and an inclined plate sedimentation pond, wherein water of the coal cooling reservoir is sent to the overhead launder from a coal cooling upper inclined plate water supply pipe in a side filtering mode, and flows into the inclined plate sedimentation pond after being treated by adding medicines, and the treated water flows into the coal cooling reservoir along an inclined plate return pipe. After the inclined plate sedimentation tank is used for carrying out turbidity reduction treatment on the coal cold water, the water quality index is stably controlled within 20NTU, and as the inclined plate sedimentation tank does not need backwashing, 300m of coal cold backwashing water is saved every day 3 Saving new water by 10 ten thousand meters 3 . The traditional turbidity reducing equipment is utilized to realize the fundamental change of the quality of the coal cold water, the investment is low, the water saving effect is obvious, and 40 ten thousand yuan can be saved in the year.
Description
Technical Field
The invention belongs to the technical field of converter dry dedusting, and particularly relates to a turbidity reducing treatment device of a converter dry dedusting coal cold water system.
Background
After electric dust removal and adsorption, a large amount of smoke dust is removed by an electric field, and a small amount of dust and high smoke temperature are still remained, wherein the temperature is generally 160-180 ℃. After being sprayed by the upper layer spray gun and the lower layer spray gun in the cylinder body of the gas cooling tower, smoke dust and heat in the gas are taken away by the cold water of the gas. The temperature of the gas is less than 70 ℃, and the dust content of the flue gas is less than 10mg/m 3 The gas meeting the recovery conditions is recovered and reused, and the cold water of the gas is recycled after turbidity reduction and cooling treatment.
The dry dedusting coal cold water system in the factory is treated by feeding coal cold water into a coal cold water tower through a coal cold water supply pump, returning the water to a coal cold water reservoir after dust collection and heat absorption, feeding the coal cold water into a shallow sand filter to reduce turbidity through a coal cold water upper tower pump, and returning the coal cold water to a coal cold water tank after cooling through a cooling water tower to realize circulating operation.
The turbidity reducing equipment of the system adopts a shallow sand filter, the back pressure backwashing mode is adopted to recover the sewage containing capacity, the back pressure is less than 0.1MPa, the sewage containing capacity is weak, the backwashing effect is poor, the backwashing water consumption is large, and the daily water consumption is 300-360m 3 The turbidity of the water quality index is between 140 NTU and 200NTU for a long time per day, which influences the stable operation of the equipment. The novel water-saving water treatment equipment with good turbidity reducing effect is selected.
Disclosure of Invention
The invention aims to provide a turbidity reducing treatment device of a dry dedusting coal cold water system of a converter, which has the advantages of water saving and good turbidity reducing effect.
The technical scheme adopted for solving the technical problems is as follows: the device comprises a coal cooling tower, an inclined plate sludge pond, a coal cooling water supply pond, a sewage pond, a shallow sand filter, a coal cooling water storage pond, an overhead launder and an inclined plate sedimentation pond, wherein the coal cooling water supply pond is connected with an inlet of the coal cooling tower through a coal cooling water supply pipe, an outlet of the coal cooling tower is connected with the coal cooling water storage pond through a coal cooling return pipe, the coal cooling water storage pond is sequentially connected with the shallow sand filter through a coal cooling tower feeding pump and a pipeline, the bottom of the shallow sand filter is connected with the coal cooling water supply pond through a pipeline, and a backwash outlet of the shallow sand filter is connected with the sewage pond through a shallow sand backwash pipe; the coal cold reservoir is also connected with an overhead launder through a coal cold upper inclined plate pump and a coal cold upper inclined plate water supply pipe, the overhead launder is connected with an inlet of an inclined plate sedimentation tank, a water outlet of the inclined plate sedimentation tank is connected with the coal cold reservoir through an inclined plate return pipe, and a sewage outlet of the inclined plate sedimentation tank is connected with an inclined plate sludge tank through a sludge return pipe.
Further, a coal-cooled water supply pump is arranged on the coal-cooled water supply pipe.
Further, the water in the coal-cooled reservoir is sent to the overhead launder by the coal-cooled upper inclined plate water supply pipe and flows into the inclined plate sedimentation tank after being treated by adding chemicals.
The invention has the following beneficial effects: the turbidity reducing treatment device of the invention runs autonomously and circulates independently, and is not influenced by the start and stop of a coal cold water circulation system and the flow. After the inclined plate sedimentation tank is used for carrying out turbidity reduction treatment on the coal cold water, the water quality index is stably controlled within 20NTU (the water quality index requires turbidity to be less than 80 NTU), and the problem that the turbidity of the shallow sand filter is poor in filtering effect and does not reach the standard is solved. Because the inclined plate sedimentation tank does not need backwashing, 300m of coal cooling backwashing water is saved every day 3 Saving new water by 10 ten thousand meters 3 . Adopts a side filtering turbidity reducing mode, and the water circulation process of the side filtering turbidity reducing device does not influence the autonomous operation of a coal cold water circulation system. The traditional turbidity reducing equipment is utilized to realize the fundamental change of the quality of the coal cold water, the investment is low, the water saving effect is obvious, and 40 ten thousand yuan can be saved in the year.
Drawings
FIG. 1 is a schematic diagram of a system configuration of a turbidity reducing treatment device according to the present invention.
In the figure, 1, a coal cooling tower, 2, a coal cooling water return pipe, 3, an inclined plate sludge tank, 4, a sludge return pipe, 5, a coal cooling water supply pipe, 6, a coal cooling water supply pump, 7, a coal cooling water supply tank, 8, a medium flow direction, 9, a sewage tank, 10, a shallow sand reverse water outlet washing pipe, 11, a shallow sand filter, 12, a coal cooling reservoir, 13, a coal cooling tower feeding pump, 14, an inclined plate return pipe, 15, an overhead launder, 16, an inclined plate sedimentation tank, 17, a coal cooling upper inclined plate pump, 18 and a coal cooling upper inclined plate water supply pipe.
Detailed Description
The following are specific examples of the present invention, and the technical solutions of the present invention are further described, but the scope of the present invention is not limited to these examples. All changes and equivalents that do not depart from the gist of the invention are intended to be within the scope of the invention.
As shown in fig. 1, the turbidity reducing treatment device of the converter dry dedusting coal-cooling water system comprises a coal cooling tower 1, an inclined plate sludge tank 3, a coal cooling water supply tank 7, a sewage tank 9, a shallow sand filter 11, a coal cooling water reservoir 12, an overhead launder 15 and an inclined plate sedimentation tank 16, wherein the medium flow direction 8 is also shown in fig. 1. The coal cold water supply tank 7 is connected with an inlet of the coal cold tower 1 through a coal cold water supply pipe 5, a coal cold water supply pump 6 is arranged on the coal cold water supply pipe 5, an outlet of the coal cold tower 1 is connected with a coal cold water reservoir 12 through a coal cold water return pipe 2, the coal cold water reservoir 12 is connected with a shallow sand filter 11 sequentially through a coal cold upper tower pump 13 and a pipeline, the bottom of the shallow sand filter 1 is connected with the coal cold water supply tank 7 through a pipeline, and a backwashing water outlet of the shallow sand filter 1 is connected with a sewage tank 9 through a shallow sand reverse water outlet washing pipe 10; the coal-cooling reservoir 12 is also connected with an overhead launder 15 through a coal-cooling upper inclined plate pump 17 and a coal-cooling upper inclined plate water supply pipe 18, the overhead launder 15 is connected with an inlet of an inclined plate sedimentation tank 16, a water outlet of the inclined plate sedimentation tank 16 is connected with the coal-cooling reservoir 12 through an inclined plate return pipe 14, and a sewage outlet of the inclined plate sedimentation tank 16 is connected with the inclined plate sludge tank 3 through a sludge return pipe 4.
The water in the coal-cooled reservoir 12 is sent to the overhead launder 15 by the coal-cooled upper inclined plate water supply pipe 18 by adopting a side filtering mode, and flows into the inclined plate sedimentation tank 16 after chemical adding treatment, and the treated water flows into the coal-cooled reservoir 12 along the inclined plate return pipe 14.
The flow rate of the coal cooling upper inclined plate pump is 120m 3 And (3) a self-priming pump of/h, wherein a water pipe with the diameter of 200mm is led from the coal cold water reservoir to the overhead launder. The original phi 400mm inclined plate water return pipe is transformed into a coal cold water inclined plate water return pipe, the tail end of the raw water pipe is controlled by a valve, and a tee joint is arranged above the coal cold water reservoir to introduce the backwater into the coal cold water reservoir. The water treatment agent is added at the overhead launder to flocculate and precipitate the coal cold water, and the suspended matters are squeezed in a periodical sewage discharge mode and discharged to an inclined plate sludge pond through a sludge return pipe. The coal cold water is pumped to the overhead launder through the upper inclined plate of the coal cold water, and then is subjected to sedimentation treatment by the inclined plate sedimentation tank, and the clear water returns to the coal cold water reservoir along the inclined plate return pipe; the sludge is discharged through a sludge return pipe of the inclined plate sedimentation tank. The circulation quantity of the inclined plate on the coal cold water is 120m 3 And/h, the total circulation amount is 150m 3 80% of the water per hour, the turbidity can be completely controlled at 20NTU, the water quality requirement is met, and the expected target is achieved.
After the dry dedusting system of the steel mill is put into use, the inclined plate sedimentation tank of the wet dedusting equipment becomes idle equipment, and the inclined plate sedimentation tank is utilized to replace the existing shallow sand filter. After the inclined plate sedimentation tank is treated by adding the medicine, the turbid ring black water of the converter with 1000NTU can be treated to clear water with the volume below 20NTU, the treatment capacity of the inclined plate sedimentation tank can meet the requirements, in addition, the inclined plate sedimentation tank only discharges sewage without backwashing, and the backwashing water is saved.
The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions.
The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (3)
1. The turbidity reducing treatment device of the converter dry dedusting coal cooling water system is characterized by comprising a coal cooling tower, an inclined plate sludge pond, a coal cooling water supply tank, a sewage pond, a shallow sand filter, a coal cooling water storage tank, an overhead launder and an inclined plate sedimentation pond, wherein the coal cooling water supply tank is connected with an inlet of the coal cooling tower through a coal cooling water supply pipe, an outlet of the coal cooling tower is connected with the coal cooling water storage tank through a coal cooling water return pipe, the coal cooling water storage tank is sequentially connected with the shallow sand filter through a coal cooling upper tower pump and a pipeline, the bottom of the shallow sand filter is connected with the coal cooling water supply tank through a pipeline, and a backwash outlet of the shallow sand filter is connected with the sewage pond through a shallow sand backwash pipe; the coal cold reservoir is also connected with an overhead launder through a coal cold upper inclined plate pump and a coal cold upper inclined plate water supply pipe, the overhead launder is connected with an inlet of an inclined plate sedimentation tank, a water outlet of the inclined plate sedimentation tank is connected with the coal cold reservoir through an inclined plate return pipe, and a sewage outlet of the inclined plate sedimentation tank is connected with an inclined plate sludge tank through a sludge return pipe.
2. The turbidity reducing treatment device of the converter dry dedusting coal cold water system according to claim 1, wherein a coal cold water supply pump is arranged on the coal cold water supply pipe.
3. The turbidity reducing treatment device of the converter dry dedusting coal cold water system according to claim 1, wherein water in the coal cold reservoir is delivered to an overhead launder from a coal cold upper inclined plate water supply pipe and flows into an inclined plate sedimentation tank after being subjected to dosing treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210695687.XA CN115044732B (en) | 2022-06-20 | 2022-06-20 | Turbidity reducing treatment device of converter dry dedusting coal cold water system |
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| CN202210695687.XA CN115044732B (en) | 2022-06-20 | 2022-06-20 | Turbidity reducing treatment device of converter dry dedusting coal cold water system |
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| CN115044732A CN115044732A (en) | 2022-09-13 |
| CN115044732B true CN115044732B (en) | 2023-08-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641309A (en) * | 1979-09-08 | 1981-04-18 | Kyodo Sanso Kk | Treating method for waste water from dust-collecting process of converter |
| CN101417841A (en) * | 2008-11-21 | 2009-04-29 | 韶关市雅鲁环保实业有限公司 | Process for treating revolving furnace flue gas dedusting water from steel mill by low hardness method |
| CN204107177U (en) * | 2014-09-05 | 2015-01-21 | 新疆八一钢铁股份有限公司 | The filtration system that converter dust-removing turbid circulating water recycles |
| CN208839200U (en) * | 2018-09-13 | 2019-05-10 | 沧州中铁装备制造材料有限公司 | Steelmaking converter turbid circulating water secondary treatment system |
| CN210176498U (en) * | 2019-06-04 | 2020-03-24 | 中冶赛迪工程技术股份有限公司 | Converter gas dedusting water treatment system |
| CN112028342A (en) * | 2020-09-25 | 2020-12-04 | 中冶赛迪工程技术股份有限公司 | Converter steel slag hot-stewing turbid circulating water treatment device and process |
-
2022
- 2022-06-20 CN CN202210695687.XA patent/CN115044732B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641309A (en) * | 1979-09-08 | 1981-04-18 | Kyodo Sanso Kk | Treating method for waste water from dust-collecting process of converter |
| CN101417841A (en) * | 2008-11-21 | 2009-04-29 | 韶关市雅鲁环保实业有限公司 | Process for treating revolving furnace flue gas dedusting water from steel mill by low hardness method |
| CN204107177U (en) * | 2014-09-05 | 2015-01-21 | 新疆八一钢铁股份有限公司 | The filtration system that converter dust-removing turbid circulating water recycles |
| CN208839200U (en) * | 2018-09-13 | 2019-05-10 | 沧州中铁装备制造材料有限公司 | Steelmaking converter turbid circulating water secondary treatment system |
| CN210176498U (en) * | 2019-06-04 | 2020-03-24 | 中冶赛迪工程技术股份有限公司 | Converter gas dedusting water treatment system |
| CN112028342A (en) * | 2020-09-25 | 2020-12-04 | 中冶赛迪工程技术股份有限公司 | Converter steel slag hot-stewing turbid circulating water treatment device and process |
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| CN115044732A (en) | 2022-09-13 |
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