CN109457065B - Waste steam recovery system for slag flushing water of iron-smelting blast furnace - Google Patents
Waste steam recovery system for slag flushing water of iron-smelting blast furnace Download PDFInfo
- Publication number
- CN109457065B CN109457065B CN201811491239.8A CN201811491239A CN109457065B CN 109457065 B CN109457065 B CN 109457065B CN 201811491239 A CN201811491239 A CN 201811491239A CN 109457065 B CN109457065 B CN 109457065B
- Authority
- CN
- China
- Prior art keywords
- water
- spray
- condenser
- blast furnace
- exhaust steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 239000002893 slag Substances 0.000 title claims abstract description 70
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 51
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 238000003723 Smelting Methods 0.000 title claims abstract description 4
- 239000002699 waste material Substances 0.000 title description 12
- 239000007921 spray Substances 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 41
- 238000011282 treatment Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000008236 heating water Substances 0.000 claims abstract description 10
- RZSYLLSAWYUBPE-UHFFFAOYSA-L Fast green FCF Chemical compound [Na+].[Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=2C(=CC(O)=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 RZSYLLSAWYUBPE-UHFFFAOYSA-L 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 238000006386 neutralization reaction Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 230000003020 moisturizing effect Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 4
- 230000002087 whitening effect Effects 0.000 abstract description 7
- 230000001502 supplementing effect Effects 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 25
- 238000005507 spraying Methods 0.000 description 24
- 239000002351 wastewater Substances 0.000 description 10
- 229920000742 Cotton Polymers 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000003595 mist Substances 0.000 description 8
- 239000000779 smoke Substances 0.000 description 7
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- 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
- Y02P10/20—Recycling
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses an iron-smelting blast furnace slag flushing water exhaust steam recovery system, which comprises a condenser and a slag flushing ditch positioned below the condenser, wherein the top end of the condenser is connected with an induced draft fan, the bottom end of the condenser is provided with an air inlet mask, a spray device, a condensing device and a heating device are sequentially arranged in the condenser from bottom to top, a collector is arranged in the bottom of the condenser, the spray device comprises a plurality of spray pipelines, spray heads are arranged on the spray pipelines, the spray pipelines are respectively connected with a first cooling tower and a water supplementing tank through spray water pumps, the collector is connected with the first cooling tower through a water treatment device, the condensing device comprises a heat exchanger, and the heat exchanger is connected with a circulating cooling system; the heating device comprises a tail gas reheater which is connected with the booster pump through a tail gas heating water supply pipe. The invention has the beneficial effects that: and the emission of pollutants is reduced while the whitening treatment is carried out, and the condensed water recovered by the whitening treatment is used as water for supplementing the system operation, so that the water is saved.
Description
Technical Field
The invention relates to the technical field of waste heat recovery, in particular to a waste steam recovery system of slag flushing water of an ironmaking blast furnace.
Background
The domestic iron and steel enterprises blast furnace slag flushing mainly comprises a horizontal flow method, a bottom filtering method, a drawing method, an ink method (INBA) and the like, the domestic large-scale blast furnace slag flushing mainly comprises the INBA method, in the INBA treatment method, slag flushing water can generate a large amount of high-temperature exhaust steam when flushing slag, most of heat in the slag is taken away (the heat exists in the form of vaporization latent heat and accounts for about 80% of the total heat), and a large amount of white smoke or white steam is formed when the part of exhaust steam is exhausted; unlike "white smoke" with relatively simple thermal power generation or other chimney components, the slag flushing exhaust steam (white smoke) not only carries a large amount of heat energy, but also is mixed with acid gases such as hydrogen sulfide, sulfur dioxide, disulfide and the like generated during slag flushing and dust such as slag cotton and the like, and the gas and impurities are mixed with water vapor in the exhaust gas to form acid gas mist, so that the acid gas mist is discharged into the air to cause serious environmental pollution to the environment, and the acid gas mist needs to be removed while the "white smoke" is eliminated.
In order to treat haze pollution, people begin to pay attention to the 'white elimination' treatment of exhaust steam and smoke, and come out of the treatment standard and the requirement for white elimination of exhaust steam, but in the initial treatment process, the 'white elimination' treatment technology only pays attention to the elimination of white smoke (water vapor) in the exhaust steam, but pays attention to the elimination of dust and acid gas and the recycling and recycling of water and heat energy in the exhaust steam.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides a slag flushing water exhaust steam recovery system of an iron-making blast furnace, which can recycle and recover condensed water and slag flushing water heat energy and eliminate pollution of acid corrosive gas and slag cotton dust while the slag flushing exhaust steam is whitened.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the utility model provides an ironmaking blast furnace slag flushing water exhaust steam recovery system, includes the condenser and is located the slag flushing ditch of condenser below, the condenser top is connected with the draught fan, the air inlet gauze mask is installed to the condenser bottom, the inside spray set, condensing equipment and the heating device of upwards being equipped with in proper order from the bottom of condenser, the bottom is equipped with the collector in the condenser, spray set includes a plurality of spray lines, be equipped with the shower head on the spray line, the spray line is connected with first cooling tower and moisturizing box through the spray water pump respectively, the collector is connected with first cooling tower through water treatment facilities, the condensing equipment includes the heat exchanger, the heat exchanger is connected with the circulative cooling system; the heating device comprises a tail gas reheater, and the tail gas reheater is connected with the booster pump through a tail gas heating water supply pipe.
Further, the water treatment device comprises a condensate tank, wherein the condensate tank is connected with a second fast green filter through a mixing water pump, and the second fast green filter is connected with the first cooling tower.
Further, the circulating cooling system comprises a second cooling tower, the second cooling tower is connected with a circulating water pump, the second cooling tower is connected with one end of the heat exchanger through a circulating water return pipe, and the circulating water pump is connected with the other end of the heat exchanger through a circulating water supply pipe.
Further, a first-stage filter and a first-speed green filter are sequentially connected between the pressurizing pump and the tail gas heating water supply pipe.
Further, a water inlet pipeline for spraying water is connected between the spraying pipeline and the spraying water pump.
Further, a collecting pipe is connected between the collector and the condensation water tank, a pH value detection device is arranged inside the collecting pipe, and a neutralization dosing device for containing pH value regulating liquid is connected to the water inlet pipeline.
Further, the neutralization dosing device is connected with a dosing pump.
Further, a slag outlet of the slag flushing ditch is provided with a second detection device.
Further, a softened water treatment device is connected between the first cooling tower and the second fast green filter.
The invention has the beneficial effects that: and the emission of pollutants is reduced while the whitening treatment is carried out, and the condensed water recovered by the whitening treatment is used as water for supplementing the system operation, so that the water is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an iron-making blast furnace slag-flushing water exhaust steam recovery system according to an embodiment of the invention.
In the figure: 1. slag flushing ditch; 2. an induced draft fan; 3. an air inlet mask; 4. a spray pipe; 5. a spray header; 6. a first cooling tower; 7. a water supplementing tank; 8. a heat exchanger; 9. a second cooling tower; 10. a circulating water pump; 11. a condensation tank; 12. a mixing water pump; 13. a tail gas reheater; 14. a first fast green filter; 15. a pressurizing pump; 16. a second fast green filter; 17. a softened water treatment device; 18. a collection pipe; 19. a water inlet pipe; 20. a dosing pump; 21. an adjusting device; 22. tail gas heating water supply pipe; 23. a primary filter; 24. and (5) a spray water pump.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
As shown in fig. 1, the recovery system for waste water and steam of slag flushing of an ironmaking blast furnace according to the embodiment of the invention comprises a condenser and a slag flushing ditch 1 positioned below the condenser, wherein the condenser is of a thin and high cuboid tower-shaped structure, the inner wall of the condenser is made of corrosion-resistant metal materials, a large induced draft fan 2 is arranged at the top of the condenser, the induced draft fan 2 is used for sucking a large amount of waste water and steam generated by the slag flushing ditch 1 into the condenser, an expanded air inlet mask 3 is arranged at the bottom of the condenser, the air inlet mask 3 covers the upper part of the slag flushing ditch, and when the waste water and steam are generated in the slag flushing ditch 1, the waste water and steam are sucked into the condenser by negative pressure generated by the induced draft fan 2; the inside of the condenser is sequentially provided with a spraying device, a condensing device and a heating device from bottom to top, the inside of the condenser is provided with a collector, the spraying device is composed of a plurality of layers of spraying heads 5 and spraying pipelines 4, the spraying heads 5 are high-pressure water mist spraying heads 5, namely the spraying device comprises a plurality of spraying pipelines 4, the spraying pipelines 4 are provided with the spraying heads 5, the spraying pipelines 4 are respectively connected with a first cooling tower 6 and a water supplementing tank 7 through a spraying water pump 24, the collector is connected with a mixed water pump 12 through a condensing water tank 11, the mixed water pump 12 is connected with the first cooling tower 6 through a second fast-speed green filter 16, the condensing device comprises a heat exchanger 8, the heat exchanger 8 is a group of efficient heat exchangers, one end of the heat exchanger 8 is connected with the second cooling tower 9 through a circulating water return pipe, the second cooling tower 9 is connected with a circulating water supply pipe 10, the circulating water supply pipe is connected with the other end of the heat exchanger 8, the heating device comprises a tail gas reheater 13, the tail gas reheater 13 is connected with a pressurizing pump 15 through a heating water supply pipe 22, the mixed water pump 12 is also connected with a group of the reheater through a high-efficient heat exchanger, and the waste steam is further cooled slag is discharged into a waste slag heat sink through a waste water circulating water return pipe, and the waste slag is thoroughly cooled down in a waste slag water is completely cooled down state, and the waste slag is completely cooled down by a waste water is discharged by a waste water heat boiler, and the waste water is completely cooled down in a waste water is completely cooled down by a waste water system; the induced draft fan 2 forms negative pressure in the condenser, most of exhaust steam is introduced into the condenser, water spraying, cooling, condensation and spray cleaning are realized through a spray pipeline 4 and a spray header 5 of a spray water section, cooling, condensation and gas-water separation of a condensing device are realized, tail gas in a heating device is discharged into the atmosphere through a tail gas heating water supply pipe 22, spray water of the spraying device and condensed water of the condensing device are collected together to form mixed water, a part of the mixed water is filtered through a second green filter 16, impurities such as slag cotton, iron, suspended matters and the like in the mixed water can be removed, and the mixed water is returned to the condensing device as spray water after cooling treatment of a first cooling tower 6; in order to avoid the water mist of the spray water, slag cotton suspended matters contained in the slag flushing exhaust steam can be cleaned, and the slag cotton suspended matters return to the condensation water tank 11 along with the mixed water, so that a second fast green filter 16 is arranged on a water outlet pipeline of the condensation water tank 11, and solid impurities such as slag cotton and the like are removed.
In one embodiment of the present invention, the pressurizing pump 15 and the tail gas heating water supply pipe 22 are sequentially connected with the first stage filter 23 and the first fast green filter 14, so that most suspended impurities in the slag flushing water are removed, and the water still contains a large amount of iron ions, and therefore, the first fast green filter 14 needs to be installed on the tail gas heating water supply pipe 22, wherein the first fast green filter 14 is a fast high temperature iron removal filter to remove iron ions in the water so as to protect the tail gas reheater 13.
In a specific embodiment of the present invention, a water inlet pipe 19 for spray water is connected between the spray pipe 4 and the spray water pump 24.
In a specific embodiment of the invention, because the waste steam of slag flushing contains acid corrosion gas, slag cotton and other pollutants, a neutralization dosing device 21 for containing pH value regulating liquid is arranged on a water inlet pipeline 19 of spray water, a collecting pipe 18 is connected between the collector and the condensation water tank 11, the collecting pipe 18 collects condensed water and spray water mixed water, and a pH value detection device is arranged in the collecting pipe 18, can detect the pH value in real time and inputs detection signals into a variable frequency controller of a pH value regulating medicament dosing pump, so that the pH value of mixed backwater is regulated and controlled in a reasonable regulation range at any time.
In one embodiment of the present invention, the neutralization dosing device 21 is connected with a dosing pump 20, and the dosing pump 20 can automatically add an alkaline water treatment agent into the water inlet pipeline 19 of the spray water to perform chemical reaction with the flushing slag exhaust gas, and the dosing amount can be automatically controlled by the pH value of the mixed backwater, so that the alkaline water treatment agent is added more accurately and precisely.
In a specific embodiment of the invention, a slag hole of the slag flushing ditch is provided with a second detection device, the second detection device is a thermometer, the change of temperature can be monitored on line in real time, the start-stop and the operation load of the system can be controlled in time, the thermometer adopts an infrared thermometer to detect on line, when the temperature of slag water in the slag hole rises to more than 95 ℃ rapidly, the slag flushing operation of the blast furnace is indicated to be started to generate a large amount of 'exhaust steam', and the white eliminating system automatically starts to operate under the highest load.
In a specific embodiment of the present invention, a softened water treatment device 17 is connected between the first cooling tower 6 and the second fast green filter 16, and the rest of the mixed water is fed into the slag flushing tank to reuse the slag flushing again.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
When the system is particularly used, when slag flushing waste steam in the slag flushing ditch 1 is generated, the waste steam is sucked into the condenser by negative pressure generated by the induced draft fan 2, and after entering the condenser, the waste steam sequentially passes through the spraying device, the condensing device and the heating device; wherein,
and (3) a spraying device: when the spraying device works, spray water cooled by the water supplementing tank 7 and the first cooling tower 6 is added into a spraying system through pressurization by the spray water pump 24, sprayed in a water mist shape by the spray header 5, mixed with the slag flushing exhaust gas sucked into the condenser for cooling, a large amount of low-temperature spray water condenses high-temperature water vapor in the high-temperature exhaust steam into water mist (small water drops), part of the small water drops are mixed and gathered with the spray water mist and are sprayed into a collector at the bottom of the condenser, the spray water in the collector is mixed with condensed water collected by the condensing device and is guided to flow out of equipment, the mixed water of the spray water and the condensed water flowing out of the condenser is input into the first cooling tower 6 for cooling after entering the water treatment device, and is pumped into a spray pipeline 4 in the condenser through the spray water pump 24 again to form stable working circulation;
condensing device: the high-temperature steam, acid gas and mineral cotton in the slag flushing exhaust steam after passing through the spraying device are basically removed, but the cooled exhaust steam still contains a large amount of high-temperature saturated steam, the high-temperature saturated steam needs to be removed in a middle condensing device, the condensing device in the condenser comprises a heat exchanger 8, the heat exchanger 8 is an efficient heat exchanger 8, a steam-water separator (water baffle) is arranged in the efficient heat exchanger 8, the heat exchanger 8 is externally connected with a circulating cooling system consisting of a circulating water pump 10 and a second cooling tower 9, the high-temperature exhaust steam is contacted with the heat exchanger 8 when passing through the condensing device, the supersaturated steam in the slag flushing exhaust steam is condensed into small water drops again after heat exchange and finally the small water drops in the slag flushing exhaust steam are discharged out of the condenser together with the mixed water of the spraying device after the steam-water is separated by the steam-water separator (water baffle); the heat exchanger 8 of the condensing device needs to be matched with a circulating cooling water system for operation, the circulating cooling water system consists of a circulating water pump 10 and a second cooling tower 9, cooling water brings heat absorbed by the heat exchanger 8 out, and the heat is dissipated by the second cooling tower 9 and then returns to the heat exchanger 8 again for circulation operation;
heating device: after being treated by the condensing device, the low-temperature exhaust steam of the saturated steam enters a heating device at the tail end of the condenser, the heating device is also a group of efficient heat exchangers, and the saturated steam in the exhaust steam is in an unsaturated steam state by reheating the low-temperature exhaust steam, so that the exhaust steam finally discharged to the atmosphere can not generate a white smoke phenomenon;
the blast furnace slag flushing process is not continuous and stable, but a periodic operation mode, a large amount of slag flushing exhaust steam is generated when slag flushing is just started, but the exhaust steam amount is gradually reduced along with gradual cooling of slag, so that the induced draft fan 2 and the circulating water pump 10 both adopt variable frequency motors, and the start-stop and operation load of the system are timely controlled by detecting the temperature changes at the positions of the outlet of the slag flushing ditch at the key position, the tail end exhaust port and the like in real time. The thermometer of the slag outlet of the slag flushing groove adopts an infrared thermometer for online detection, when the temperature of slag water discharged from the slag outlet is rapidly increased to more than 95 ℃, the slag flushing operation of the blast furnace is indicated to start generating a large amount of exhaust steam, and at the moment, the white eliminating system automatically starts the highest load operation, and meanwhile, the spray water quantity and the circulating quantity of cooling water are increased; the system automatically and synchronously reduces the load operation along with the gradual reduction of the temperature of the slag outlet, and reduces the spray water quantity and the circulation quantity of the circulating pump; the control system has a certain range setting and adjusting function, and after the system operates for a period of time, according to the actual environment condition, under the premise of ensuring good whitening treatment effect, the power load and the spraying water quantity are reduced to the maximum extent, the operation cost is saved, and in addition, the automatic control system can be changed into an emergency mode of manual operation and full-load operation in emergency.
In summary, by means of the technical scheme, the emission of pollutants is reduced while the whitening treatment is carried out, and the condensate water recovered by the whitening treatment is used as water supplement for the system operation, so that water is saved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. The utility model provides an ironmaking blast furnace slag flushing water exhaust steam recovery system, includes condenser and is located slag flushing ditch (1) of condenser below, its characterized in that, the condenser top is connected with draught fan (2), air inlet gauze mask (3) are installed to the condenser bottom, inside spray set, condensing equipment and the heating device of upwards being equipped with in proper order from the bottom of condenser, the bottom is equipped with the collector in the condenser, spray set includes a plurality of spray lines (4), be equipped with shower head (5) on spray line (4), spray line (4) are connected with first cooling tower (6) and moisturizing case (7) through spray pump (24) respectively, the collector is connected with first cooling tower (6) through water treatment facilities, condensing equipment includes heat exchanger (8), heat exchanger (8) are connected with the circulation cooling system; the heating device comprises a tail gas reheater (13), and the tail gas reheater (13) is connected with a pressurizing pump (15) through a tail gas heating water supply pipe (22).
2. The iron-making blast furnace slag-flushing water exhaust steam recovery system according to claim 1, wherein the water treatment device comprises a condensate tank (11), the condensate tank (11) is connected with a second fast green filter (16) through a mixing water pump (12), and the second fast green filter (16) is connected with the first cooling tower (6).
3. The iron-making blast furnace slag-flushing water exhaust steam recovery system according to claim 1, wherein the circulating cooling system comprises a second cooling tower (9), the second cooling tower (9) is connected with a circulating water pump (10), the second cooling tower (9) is connected with one end of the heat exchanger (8) through a circulating water return pipe, and the circulating water pump (10) is connected with the other end of the heat exchanger (8) through a circulating water supply pipe.
4. The blast furnace slag-washing water exhaust steam recovery system according to claim 1, wherein a primary filter (23) and a first quick-acting filter (14) are sequentially connected between the pressurizing pump (15) and the tail gas heating water supply pipe (22).
5. The blast furnace slag-washing water exhaust steam recovery system according to claim 2, wherein a spray water inlet pipeline (19) is connected between the spray pipeline (4) and the spray water pump (24).
6. The iron-smelting blast furnace slag flushing water exhaust steam recovery system according to claim 5, wherein a collecting pipe (18) is connected between the collector and the condensation water tank (11), a pH value detection device is arranged inside the collecting pipe (18), and a neutralization dosing device (21) for containing a pH value regulating solution is connected to the water inlet pipeline (19).
7. The blast furnace slag-washing water exhaust steam recovery system according to claim 6, wherein the neutralization dosing device (21) is connected with a dosing pump (20).
8. The blast furnace slag-flushing water exhaust steam recovery system of claim 1, wherein the slag hole of the slag flushing channel is provided with a second detection device.
9. The blast furnace slag-washing water exhaust steam recovery system according to claim 2, wherein a softened water treatment device (17) is connected between the first cooling tower (6) and the second fast green filter (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491239.8A CN109457065B (en) | 2018-12-07 | 2018-12-07 | Waste steam recovery system for slag flushing water of iron-smelting blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491239.8A CN109457065B (en) | 2018-12-07 | 2018-12-07 | Waste steam recovery system for slag flushing water of iron-smelting blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109457065A CN109457065A (en) | 2019-03-12 |
| CN109457065B true CN109457065B (en) | 2023-11-10 |
Family
ID=65612639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811491239.8A Active CN109457065B (en) | 2018-12-07 | 2018-12-07 | Waste steam recovery system for slag flushing water of iron-smelting blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109457065B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145945B (en) * | 2019-04-16 | 2021-04-13 | 浙江菲达环保科技股份有限公司 | Blast furnace slag flushing steam whitening system and method based on waste heat heating |
| CN113564284A (en) * | 2020-04-29 | 2021-10-29 | 洛阳瑞昌环境工程有限公司 | System for eliminating white waste steam of blast furnace slag flushing |
| CN112553387B (en) * | 2020-12-11 | 2023-10-03 | 浙江菲达环保科技股份有限公司 | High-temperature metallurgical slag water quenching and smoke treatment device and method |
| CN112981016A (en) * | 2021-02-20 | 2021-06-18 | 常州机电职业技术学院 | Cooling system and cooling method for smelting waste residues |
| CN114912230B (en) * | 2022-03-29 | 2024-02-27 | 青岛科技大学 | Continuous execution path design method, device and process for water-saving clean production technology |
| CN116972652B (en) * | 2023-07-28 | 2024-03-22 | 昊姆（上海）节能科技有限公司 | Waste heat recovery system for slag flushing water and slag flushing exhaust steam of blast furnace and operation mode thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100774220B1 (en) * | 2006-06-29 | 2007-11-13 | 범우이엔지 주식회사 | A cooling system for furnace siag |
| CN103060494A (en) * | 2013-01-09 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Vapor recovery blast furnace slag flushing water system |
| CN203256281U (en) * | 2013-05-08 | 2013-10-30 | 中冶赛迪工程技术股份有限公司 | Flushing cinder water vapor recovery device |
| CN104087691A (en) * | 2014-07-23 | 2014-10-08 | 福建立信换热设备制造股份公司 | Process for recycling waste heat of slag flushing water vapor and dispersing fog and equipment adopted in same |
| CN107815514A (en) * | 2017-12-07 | 2018-03-20 | 中冶京诚工程技术有限公司 | The system and recovery method of washing slag water Steam Recovery and the white haze that disappears |
| CN108411055A (en) * | 2018-05-18 | 2018-08-17 | 天津华赛尔传热设备有限公司 | A kind of blast furnace slag flushing steam disappears white system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU92235B1 (en) * | 2013-07-01 | 2015-01-02 | Wurth Paul Sa | Steam condensation tower for a granulation installation |
-
2018
- 2018-12-07 CN CN201811491239.8A patent/CN109457065B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100774220B1 (en) * | 2006-06-29 | 2007-11-13 | 범우이엔지 주식회사 | A cooling system for furnace siag |
| CN103060494A (en) * | 2013-01-09 | 2013-04-24 | 北京世纪源博科技股份有限公司 | Vapor recovery blast furnace slag flushing water system |
| CN203256281U (en) * | 2013-05-08 | 2013-10-30 | 中冶赛迪工程技术股份有限公司 | Flushing cinder water vapor recovery device |
| CN104087691A (en) * | 2014-07-23 | 2014-10-08 | 福建立信换热设备制造股份公司 | Process for recycling waste heat of slag flushing water vapor and dispersing fog and equipment adopted in same |
| CN107815514A (en) * | 2017-12-07 | 2018-03-20 | 中冶京诚工程技术有限公司 | The system and recovery method of washing slag water Steam Recovery and the white haze that disappears |
| CN108411055A (en) * | 2018-05-18 | 2018-08-17 | 天津华赛尔传热设备有限公司 | A kind of blast furnace slag flushing steam disappears white system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109457065A (en) | 2019-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109457065B (en) | Waste steam recovery system for slag flushing water of iron-smelting blast furnace | |
| WO2020191564A1 (en) | Energy-saving system for adopting electric heat pump to deeply recycle smoke waste heat of thermal power plant for centralized heating | |
| CN109045976A (en) | A kind of ammonia process of desulfurization flue gas disappears white waste heat depth recovery system and application | |
| CN107120714A (en) | A kind of thermal power plant boiler fume afterheat is used for the whole yearization comprehensive utilization energy conserving system of central heating or heating boiler feed water | |
| CN202927864U (en) | Waste-heat utilization system for desulfuration smoke dehumidification | |
| CN109945278A (en) | A kind of energy conserving system being used for central heating using absorption heat pump depth Mist heat recovering | |
| CN109939556A (en) | The flue gas advanced purification system and its method that residual heat utilization-type plume is eliminated | |
| CN110272082B (en) | Desulfurization waste water evaporation crystallization coupling flue gas reheat integrated system | |
| CN105937765B (en) | A kind of the burning quenching apparatus and method of processing high viscosity strong corrosive salt bearing liquid wastes | |
| CN106582237A (en) | Incineration flue gas purification and cyclic treatment system | |
| CN109945277A (en) | A kind of energy conserving system being used for central heating using electric heat pump depth recycling remaining heat of flue gas from steam power plant | |
| CN110864342A (en) | Water replenishing system and method for indirectly heating heat supply network by using low-temperature waste heat of flue gas | |
| CN110926217B (en) | Yellow phosphorus slag water quenching waste heat recovery device | |
| CN209034090U (en) | A kind of ammonia process of desulfurization flue gas disappears white waste heat depth recovery system | |
| CN211650417U (en) | Desulfurization slurry cooling flue gas waste heat supply integrated system | |
| CN211119603U (en) | Water replenishing system for indirectly heating heat supply network by using low-temperature waste heat of flue gas | |
| CN211367032U (en) | Steam wet type self-condensation device for desulfurization wastewater zero-discharge system | |
| CN210057887U (en) | Flue gas deep purification system for eliminating waste heat utilization type smoke plume | |
| RU2700843C1 (en) | Combined-cycle plant with deep waste gas heat recovery | |
| CN208599449U (en) | A kind of flue gas of refuse burning ultrapurification disappears white imperial system | |
| CN208395214U (en) | A kind of blast furnace slag flushing steam disappears white system | |
| CN205878185U (en) | That handles that high viscosity highly corrosive contains salt waste liquid burns rapid cooling device | |
| CN202913003U (en) | Converter smoke treatment system | |
| CN212057351U (en) | Recovery system of residual heat of flue gas and moisture of coal-fired unit | |
| CN212003289U (en) | System for flue gas waste heat and moisture are retrieved in desulfurization thick liquid flash distillation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |