CN212269507U - High-concentration wastewater zero discharge system for blast furnace slag flushing cleaning production and waste heat method in steel plant - Google Patents
High-concentration wastewater zero discharge system for blast furnace slag flushing cleaning production and waste heat method in steel plant Download PDFInfo
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- CN212269507U CN212269507U CN202020496891.5U CN202020496891U CN212269507U CN 212269507 U CN212269507 U CN 212269507U CN 202020496891 U CN202020496891 U CN 202020496891U CN 212269507 U CN212269507 U CN 212269507U
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 72
- 239000002351 wastewater Substances 0.000 title claims abstract description 67
- 239000002918 waste heat Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 24
- 239000010959 steel Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000004140 cleaning Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000001704 evaporation Methods 0.000 claims abstract description 65
- 230000008020 evaporation Effects 0.000 claims abstract description 65
- 238000005406 washing Methods 0.000 claims abstract description 34
- 239000010865 sewage Substances 0.000 claims abstract description 27
- 150000003839 salts Chemical class 0.000 claims abstract description 16
- 238000002425 crystallisation Methods 0.000 claims abstract description 11
- 230000008025 crystallization Effects 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000006477 desulfuration reaction Methods 0.000 claims description 13
- 230000023556 desulfurization Effects 0.000 claims description 13
- 238000005352 clarification Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 239000012267 brine Substances 0.000 claims description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 6
- 230000009615 deamination Effects 0.000 claims description 6
- 238000006481 deamination reaction Methods 0.000 claims description 6
- 239000012452 mother liquor Substances 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 239000008188 pellet Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 2
- 239000013589 supplement Substances 0.000 abstract description 4
- 238000006298 dechlorination reaction Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 239000010908 plant waste Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000012141 concentrate Substances 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 11
- 239000003344 environmental pollutant Substances 0.000 description 9
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- 238000005516 engineering process Methods 0.000 description 5
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- 239000002699 waste material Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
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- 241001232253 Xanthisma spinulosum Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
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Abstract
A system for realizing clean blast furnace slag flushing production in a steel plant and realizing high-concentration wastewater zero discharge by a waste heat method belongs to the technical field of wastewater zero discharge and steel plant waste residue recycling. The utility model adopts the waste heat of the steel plant as the driving heat source, optimizes and innovates the zero discharge of high-concentration waste water of the whole plant, the blast furnace slag flushing process and the grain slag dechlorination purification process, firstly uses the concentrated water of the sewage treatment station with higher cleaning degree for cleaning the coarse slag, and then sends the concentrated water into the slag flushing pool; feeding various miscellaneous wastewater into an indirect evaporative cooling tower; most of the slag flushing water returns to slag flushing after being sent into a flash evaporator, flash steam is sent into a single-effect waste heat evaporator to be used as a heat source to evaporate and concentrate the mixed wastewater, concentrated solution is sent into a waste heat evaporation crystallizer for salt separation and crystallization after pretreatment, and secondary steam is sent into an indirect evaporation cooling tower to be used as an evaporation and concentration heat source of various kinds of mixed wastewater; the condensed water supplements the washing slag. The process comprises three processes of evaporation concentration and salt separation crystallization driven by waste heat, and realizes zero discharge of high-concentration wastewater and dechlorination purification of water slag with low cost.
Description
Technical Field
The utility model relates to a steel plant blast furnace slag flushing cleaning production and waste heat method high concentration waste water zero discharge system belongs to sewage zero release and steel plant waste residue resourceful technical field.
Background
The steel plant belongs to the typical industry with high energy consumption, high pollution and high emission, has great energy consumption and water consumption, has great emission amount of waste gas, waste water and waste residue, and has great potential hazards of great pollution and secondary pollution although measures for saving energy and water and controlling gas, liquid and solid pollution are carried out in recent years and remarkable progress is made. One typical scenario is: produced desulfurization waste water of the treatment of all kinds of flue gases etc. in the factory, the high enriched waste water that the sewage treatment station produced is often sent to the blast furnace slag and is washed the sediment and evaporate, though digest a large amount of sewage and reduced the sewage by a wide margin and arrange outward, but belong to the transfer of pollutant and even danger wastes material and not radical cure, have uncovered pollution property: a large amount of toxic and harmful pollutants and smoke dust are carried by the flushing slag water vapor and directly emitted to the atmosphere; various pollutants are mixed into the blast furnace granulated slag and are transported out as building material raw materials and the like, and chloride ions, heavy metals, organic hazardous wastes and the like are simultaneously transferred into the granulated slag, so that the quality of recycling the granulated slag is influenced, and the secondary pollution risk also exists; the sewage deeply enters the soil to pollute the soil, water sources and the like for a long time. Therefore, there is a need to fundamentally seek to eliminate this comprehensive polluting production situation.
At present, the conventional method for realizing the external zero discharge of the sewage in the steel plant usually carries out proper decrement on the sewage with lower concentration through pretreatment-membrane concentration, so that the sewage after decrement can be completely eliminated through slag flushing, but various waste salt components and dangerous waste components of the sewage can not be eliminated, the pretreatment requirement of the membrane concentration is extremely high, the cost is higher, and the membrane is frequently blocked, so that the maintenance workload is large, the membrane is frequently replaced, and the operation and maintenance cost is high. In few cases, the MVR technology or the multi-effect evaporation technology is used for evaporation crystallization, but the energy consumption or the steam consumption is high, the operation cost is too high, and the purity of the crystallized salt is not high, so that the resource utilization cannot be realized, and thus, few adopters are used in engineering practice.
SUMMERY OF THE UTILITY MODEL
The utility model aims at and the task are, to above-mentioned steel plant sewage zero release nature and main contradiction, it optimizes blast furnace slag flushing process, increase hierarchical slag washing dechlorination purification process, adopt step waste heat utilization technique to carry out evaporative concentration to all kinds of high enriched waste water in the steel plant, divide the salt crystallization, reach and reduce the circulation by a wide margin and flush all kinds of pollutants of sediment aquatic, reduce the water sediment pollutant content, reduce the purpose such as pollutant dispersion volume when flushing the sediment, under the prerequisite of controlling all kinds of pollutants to disperse better, improve the water sediment quality, retrieve a large amount of water resources, other resources that contain in the recovered waste water, promote the three wastes to administer and circular economy's organic combination.
The utility model discloses a concrete description is: a system for realizing clean blast furnace slag flushing production and high-concentration wastewater zero discharge by a waste heat method in a steel and iron plant comprises four subsystems of classified slag flushing, various wastewater waste heat concentration processes and high-concentration wastewater waste heat evaporation salt separation crystallization, and is characterized in that a feed inlet of a slag flushing vehicle 1 of the classified slag flushing process is communicated with a slag outlet of a slag water pool 3, a first slag flushing water inlet of the slag flushing vehicle 1 of the classified slag flushing process is communicated with a water supply pipe of strong brine A of a sewage treatment station, a slag flushing wastewater outlet of the slag flushing vehicle 1 of the classified slag flushing process is connected with a slag flushing water inlet of the slag water pool 3, the slag flushing vehicle 1 of the classified slag flushing process is also provided with a discharge port for purifying water slag B, a slag flushing water outlet of the slag water pool 3 is connected with a high-temperature water inlet of a flash evaporator 5 through a circulating pump 4, a high-temperature water outlet of the flash evaporator 5 is communicated with a water inlet of a slag flushing tower 2, and a feed inlet of a, the slag flushing wastewater outlet and the flash steam outlet of the flash evaporator 5 are respectively connected with the wastewater first inlet and the high-temperature steam inlet of the single-effect residual heat evaporation concentrator 6, the secondary steam outlet of the single-effect residual heat evaporation concentrator 6 is connected with the high-temperature inlet of the heat exchanger 9 of the indirect evaporation cooling tower 7, the low-temperature inlet of the heat exchanger 9 is connected with the clarified wastewater outlet of the pretreatment tank 11, the mixed wastewater inlet of the pretreatment tank 11 is respectively communicated with the water supply pipes of the sintering machine desulfurization wastewater E, the pellet desulfurization wastewater F, the boiler desulfurization wastewater G and the sewage treatment station strong brine residual water H, the indirect evaporation cooling tower 7 is provided with a tower bottom water tank 10 at the lower part besides the heat exchanger 9 at the middle lower part, a spray area 8 at the middle upper part, an air outlet 13 for exhausting K is arranged at the upper part of the spray area 8, and an air inlet 12 for air inlet, the impurity concentrated wastewater outlet of the tower bottom water tank 10 is connected with the wastewater second inlet of the single-effect waste heat evaporation concentrator 6, after the primary condensed water outlet of the single-effect waste heat evaporation concentrator 6 is connected with the secondary condensed water outlet of the heat exchanger 9, and then the outlet of the external condensed water D, the inlet of the slag washing water supplement C and the second inlet of the slag washing water of the slag washing vehicle 1 are connected, the high-concentration slag flushing wastewater outlet of the single-effect waste heat evaporation concentrator 6 is connected with the feed inlet of the softening clarification tank 14, the softening clarification tank 14 is also provided with the inlet of a medicament L, the outlet and the discharge outlet of sludge M, the discharge outlet of the softening clarification tank 14 is connected with the inlet of a deamination device 15, the outlet of the deamination device 15 is connected with the feed inlet of a waste heat evaporation crystallizer 16, the discharge outlet of the waste heat evaporation crystallizer 16 is communicated with the feed inlet of pure salt N of a drying and packaging device 17, and the waste heat evaporation crystallizer 16 is also provided with the outlet of the external condensed water Q and the outlet of mother.
The first slag washing water inlet of the slag washing vehicle 1 is arranged on one side, close to the feeding hole, of the slag washing vehicle 1, and the second slag washing water inlet is arranged on one side, close to the discharging hole, of the slag washing vehicle 1.
The mother liquor outlet of the waste heat evaporation crystallizer 16 is communicated with the slag water tank 3.
The heat exchanger 9 adopts a tube bundle type heat exchanger structure of negative pressure steam condensation in the tube and adopts a negative pressure primary evaporation heat exchange structure.
The single-effect waste heat evaporation concentrator 6 adopts a crystal seed and particle anti-scaling structure and adopts a negative pressure primary evaporation heat exchange structure.
The waste heat evaporation crystallizer 16 adopts a crystal seed and particle anti-scaling structure of large-particle crystallization salt, and adopts a positive pressure one-level heat exchange structure, a positive pressure multi-level heat exchange structure, a negative pressure one-level evaporation heat exchange structure or a negative pressure multi-level evaporation heat exchange structure.
The technical effects of the utility model are that: the method solves the problem of treatment of high-concentration sewage in the plant and control of pollutants in blast furnace slag flushing, which are key links disturbing zero discharge and deep pollution control of sewage in steel plants at present, and can effectively improve the water quality and quality of slag flushing circulating water, the pollutant discharge level in the slag flushing process, and recovered water resources so as to reduce the water consumption per ton of steel, effectively reduce the operating cost and the like. Compared with the conventional sewage membrane concentration and evaporative crystallization technology, the method can reduce 80-90% of artificial energy requirements, greatly reduce energy consumption and reduce the operation cost by one order of magnitude, and becomes a key technical mode of comprehensive sewage zero discharge and resource recovery built and used by users in the high-salinity wastewater treatment and reuse field of steel plants. The utility model discloses can make the steel plant trade realize showing the clean production type green factory mode that reduces to technology sewage zero release, water resource consumption by the high discharge mode that pollutes and change, have technology, economic value and environmental protection, social effect concurrently, realize that cyclic economy handles the mode and also have industry application value and social to the high salt waste water of other industrial enterprises.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
The parts in fig. 1 are numbered and named as follows.
The slag washing vehicle comprises a slag washing vehicle 1, a slag washing tower 2, a slag water pool 3, a circulating pump 4, a flash evaporator 5, a single-effect waste heat evaporation concentrator 6, an indirect evaporation cooling tower 7, a spraying area 8, a heat exchanger 9, a tower bottom water pool 10, a pretreatment pool 11, an air inlet 12, an air outlet 13, a softening clarification pool 14, a deamination device 15, a waste heat evaporation crystallizer 16, a drying and packaging device 17, a sewage treatment station strong brine A, purified water slag B, slag washing water supplement C, outside feeding condensate D, sintering machine desulfurization wastewater E, pellet desulfurization wastewater F, boiler desulfurization wastewater G, sewage treatment station strong brine water H, inlet air J, exhaust air K, a medicament L, sludge M, pure salt N, mother liquor P and outside discharge condensate Q in the grading slag washing process.
Detailed Description
Fig. 1 is a schematic diagram of the system of the present invention.
The utility model discloses a concrete embodiment as follows: a system for realizing clean blast furnace slag flushing production and high-concentration wastewater zero discharge by a waste heat method in a steel and iron plant comprises four subsystems of classified slag flushing, various wastewater waste heat concentration processes and high-concentration wastewater waste heat evaporation salt separation crystallization, and is characterized in that a feed inlet of a slag flushing vehicle 1 of the classified slag flushing process is communicated with a slag outlet of a slag water pool 3, a first slag flushing water inlet of the slag flushing vehicle 1 of the classified slag flushing process is communicated with a water supply pipe of strong brine A of a sewage treatment station, a slag flushing wastewater outlet of the slag flushing vehicle 1 of the classified slag flushing process is connected with a slag flushing water inlet of the slag water pool 3, the slag flushing vehicle 1 of the classified slag flushing process is also provided with a discharge port for purifying water slag B, a slag flushing water outlet of the slag water pool 3 is connected with a high-temperature water inlet of a flash evaporator 5 through a circulating pump 4, a high-temperature water outlet of the flash evaporator 5 is communicated with a water inlet of a slag flushing tower 2, and a feed inlet of a, the slag flushing wastewater outlet and the flash steam outlet of the flash evaporator 5 are respectively connected with the wastewater first inlet and the high-temperature steam inlet of the single-effect residual heat evaporation concentrator 6, the secondary steam outlet of the single-effect residual heat evaporation concentrator 6 is connected with the high-temperature inlet of the heat exchanger 9 of the indirect evaporation cooling tower 7, the low-temperature inlet of the heat exchanger 9 is connected with the clarified wastewater outlet of the pretreatment tank 11, the mixed wastewater inlet of the pretreatment tank 11 is respectively communicated with the water supply pipes of the sintering machine desulfurization wastewater E, the pellet desulfurization wastewater F, the boiler desulfurization wastewater G and the sewage treatment station strong brine residual water H, the indirect evaporation cooling tower 7 is provided with a tower bottom water tank 10 at the lower part besides the heat exchanger 9 at the middle lower part, a spray area 8 at the middle upper part, an air outlet 13 for exhausting K is arranged at the upper part of the spray area 8, and an air inlet 12 for air inlet, the impurity concentrated wastewater outlet of the tower bottom water tank 10 is connected with the wastewater second inlet of the single-effect waste heat evaporation concentrator 6, after the primary condensed water outlet of the single-effect waste heat evaporation concentrator 6 is connected with the secondary condensed water outlet of the heat exchanger 9, and then the outlet of the external condensed water D, the inlet of the slag washing water supplement C and the second inlet of the slag washing water of the slag washing vehicle 1 are connected, the high-concentration slag flushing wastewater outlet of the single-effect waste heat evaporation concentrator 6 is connected with the feed inlet of the softening clarification tank 14, the softening clarification tank 14 is also provided with the inlet of a medicament L, the outlet and the discharge outlet of sludge M, the discharge outlet of the softening clarification tank 14 is connected with the inlet of a deamination device 15, the outlet of the deamination device 15 is connected with the feed inlet of a waste heat evaporation crystallizer 16, the discharge outlet of the waste heat evaporation crystallizer 16 is communicated with the feed inlet of pure salt N of a drying and packaging device 17, and the waste heat evaporation crystallizer 16 is also provided with the outlet of the external condensed water Q and the outlet of mother.
The first slag washing water inlet of the slag washing vehicle 1 is arranged on one side, close to the feeding hole, of the slag washing vehicle 1, and the second slag washing water inlet is arranged on one side, close to the discharging hole, of the slag washing vehicle 1.
The mother liquor outlet of the waste heat evaporation crystallizer 16 is communicated with the slag water tank 3.
The heat exchanger 9 adopts a tube bundle type heat exchanger structure of negative pressure steam condensation in the tube and adopts a negative pressure primary evaporation heat exchange structure.
The single-effect waste heat evaporation concentrator 6 adopts a crystal seed and particle anti-scaling structure and adopts a negative pressure primary evaporation heat exchange structure.
The waste heat evaporation crystallizer 16 adopts a crystal seed and particle anti-scaling structure of large-particle crystallization salt, and adopts a positive pressure one-level heat exchange structure, a positive pressure multi-level heat exchange structure, a negative pressure one-level evaporation heat exchange structure or a negative pressure multi-level evaporation heat exchange structure.
It should be noted that the present invention provides a method for solving the problems of zero discharge of high-concentration wastewater in steel plants, clean production of blast furnace slag flushing, etc. completely by using a heat exchange method, a waste heat evaporation and energy gradient utilization method, a gradient slag flushing method, etc., and different specific implementation measures and specific implementation devices with different structures can be provided according to the overall solution, wherein the specific implementation is only a preferred implementation, and any other similar simple deformation implementation, such as the type selection and number change of the waste heat recovery heat exchanger; the waste heat source type adopts low-pressure steam with the temperature lower than 100 ℃, positive-pressure steam with the temperature higher than the atmospheric pressure, or waste heat hot water, smoke and the like; only a part of the claims, but not all of the waste heat driven evaporation, or sewage pretreatment flow, or post-treatment flow, etc. are implemented; or simply replacing membranes with different types, performances and qualities or other sewage treatment devices to perform sewage treatment in corresponding links; or other modifications and the like which can be considered by a person skilled in the art; or the technical mode is adapted to different application scenes by the same or similar method, system and structure, and the technical mode falls into the protection scope of the utility model.
Claims (6)
1. A blast furnace slag flushing clean production and waste heat method high-concentration wastewater zero discharge system of a steel plant comprises four subsystems of a grading slag flushing process, a slag flushing process, various wastewater waste heat concentration processes and high-concentration wastewater waste heat evaporation salt separation crystallization, and is characterized in that a feed inlet of a slag flushing vehicle (1) of the grading slag flushing process is communicated with a slag outlet of a slag pool (3), a first slag flushing water inlet of the slag flushing vehicle (1) of the grading slag flushing process is communicated with a water supply pipe of concentrated brine (A) of a sewage treatment station, a slag flushing wastewater outlet of the slag flushing vehicle (1) of the grading slag flushing process is connected with a slag flushing water inlet of the slag pool (3), the slag flushing vehicle (1) of the grading slag flushing process is also provided with a discharge outlet of purified water slag (B), a slag flushing water outlet of the slag pool (3) is connected with a high-temperature water inlet of a flash evaporator (5) through a circulating pump (4), and a high-temperature water outlet of the flash evaporator (5) is communicated with a water inlet of a slag flushing tower (, a feed inlet of a slag pool (3) at a bottom discharge hole of the slag flushing tower (2) is communicated, a slag flushing wastewater outlet and a flash steam outlet of a flash evaporator (5) are respectively connected with a first wastewater inlet and a high-temperature steam inlet of a single-effect waste heat evaporation concentrator (6), a secondary steam outlet of the single-effect waste heat evaporation concentrator (6) is connected with a high-temperature inlet of a heat exchanger (9) of an indirect evaporation cooling tower (7), a low-temperature inlet of the heat exchanger (9) is connected with a clarified wastewater outlet of a pretreatment tank (11), a mixed wastewater inlet of the pretreatment tank (11) is respectively communicated with water supply pipes of desulfurization wastewater (E) of a sintering machine, pellet desulfurization wastewater (F), desulfurization wastewater (G) of a boiler and strong brine residual water (H) of a sewage treatment station, a tower bottom water pool (10) is arranged at the lower part of the indirect evaporation cooling tower (7) except the middle lower part of the, the middle upper part is also provided with a spraying area (8), the upper part of the spraying area (8) is provided with an air outlet (13) for exhausting air (K), the side part above the tower bottom water tank (10) is provided with an air inlet (12) for air inlet (J), the impurity-concentrated wastewater outlet of the tower bottom water tank (10) is connected with the wastewater second inlet of the single-effect waste heat evaporation concentrator (6), the primary condensate outlet of the single-effect waste heat evaporation concentrator (6) is connected with the secondary condensate outlet of the heat exchanger (9) and then is connected with the outlet of the delivered condensate (D), the inlet of the washing slag water replenishing water (C) and the washing slag water second inlet of the washing slag vehicle (1), the high-concentrated washing slag wastewater outlet of the single-effect waste heat evaporation concentrator (6) is connected with the feed inlet of a softening clarification tank (14), the softening clarification tank (14) is also provided with the inlet of a medicament (L), the outlet and the discharge outlet of sludge (M), and the discharge outlet of the softening clarification tank (14) are connected with the inlet of a deamina, an outlet of the deamination device (15) is connected with a feed inlet of a waste heat evaporation crystallizer (16), a discharge outlet of the waste heat evaporation crystallizer (16) is communicated with a feed inlet of pure salt (N) of a drying and packaging device (17), and the waste heat evaporation crystallizer (16) is also provided with an outlet for discharging condensed water (Q) and an outlet for mother liquor (P).
2. The steel plant blast furnace slag flushing clean production and waste heat method high concentration wastewater zero discharge system according to claim 1, characterized in that the first slag washing water inlet of the slag washing vehicle (1) is arranged at one side of the slag washing vehicle (1) close to the feed inlet, and the second slag washing water inlet is arranged at one side of the slag washing vehicle (1) close to the discharge outlet.
3. The steel plant blast furnace slag flushing clean production and waste heat method high concentration wastewater zero discharge system according to claim 1, characterized in that the mother liquor outlet of the waste heat evaporation crystallizer (16) is communicated with the slag water tank (3).
4. The steel plant blast furnace slag flushing clean production and waste heat method high concentration wastewater zero discharge system according to claim 1, characterized in that the heat exchanger (9) adopts a tube bundle type heat exchanger structure of in-tube negative pressure steam condensation and adopts a negative pressure primary evaporation heat exchange structure.
5. The system for the clean production of the blast furnace slag washing of the steel plant and the zero discharge of the high concentration wastewater by the waste heat method according to claim 1, characterized in that the single-effect waste heat evaporation concentrator (6) adopts a seed crystal and particle anti-scaling structure and a negative pressure primary evaporation heat exchange structure.
6. The system for the clean production of the blast furnace slag washing of the steel plant and the zero discharge of the high concentration wastewater by the waste heat method according to claim 1, characterized in that the waste heat evaporation crystallizer (16) adopts a seed crystal and a particle anti-scaling structure of large particle crystallization salt, and adopts a positive pressure one-stage heat exchange structure, a positive pressure multi-stage heat exchange structure, a negative pressure one-stage evaporation heat exchange structure or a negative pressure multi-stage evaporation heat exchange structure.
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| CN202020496891.5U CN212269507U (en) | 2020-04-07 | 2020-04-07 | High-concentration wastewater zero discharge system for blast furnace slag flushing cleaning production and waste heat method in steel plant |
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| CN202020496891.5U CN212269507U (en) | 2020-04-07 | 2020-04-07 | High-concentration wastewater zero discharge system for blast furnace slag flushing cleaning production and waste heat method in steel plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112870755A (en) * | 2021-01-11 | 2021-06-01 | 青岛理工大学 | Potassium chloride solution concentration and crystallization production system based on waste heat of blast furnace slag flushing water and working method |
| CN113620628A (en) * | 2021-08-31 | 2021-11-09 | 西南科技大学 | Recycling method of chlorine element in titanium extraction slag |
| CN113666650A (en) * | 2021-08-31 | 2021-11-19 | 西南科技大学 | Method for preparing auxiliary cementing material by extracting titanium slag and auxiliary cementing material |
| CN111392792B (en) * | 2020-04-07 | 2024-04-26 | 清华大学 | Zero-emission sewage and blast furnace slag dechlorination purification method and system by waste heat method in steel plant |
-
2020
- 2020-04-07 CN CN202020496891.5U patent/CN212269507U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392792B (en) * | 2020-04-07 | 2024-04-26 | 清华大学 | Zero-emission sewage and blast furnace slag dechlorination purification method and system by waste heat method in steel plant |
| CN112870755A (en) * | 2021-01-11 | 2021-06-01 | 青岛理工大学 | Potassium chloride solution concentration and crystallization production system based on waste heat of blast furnace slag flushing water and working method |
| CN112870755B (en) * | 2021-01-11 | 2022-04-22 | 青岛理工大学 | Potassium chloride solution concentration and crystallization production system based on waste heat of blast furnace slag flushing water and working method |
| CN113620628A (en) * | 2021-08-31 | 2021-11-09 | 西南科技大学 | Recycling method of chlorine element in titanium extraction slag |
| CN113666650A (en) * | 2021-08-31 | 2021-11-19 | 西南科技大学 | Method for preparing auxiliary cementing material by extracting titanium slag and auxiliary cementing material |
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