CN109457065A - A kind of blast furnace washing slag water dead steam recovery system - Google Patents
A kind of blast furnace washing slag water dead steam recovery system Download PDFInfo
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- CN109457065A CN109457065A CN201811491239.8A CN201811491239A CN109457065A CN 109457065 A CN109457065 A CN 109457065A CN 201811491239 A CN201811491239 A CN 201811491239A CN 109457065 A CN109457065 A CN 109457065A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 239000002893 slag Substances 0.000 title claims abstract description 72
- 238000011084 recovery Methods 0.000 title claims abstract description 10
- 238000005406 washing Methods 0.000 title abstract 2
- 238000001816 cooling Methods 0.000 claims abstract description 41
- 238000005507 spraying Methods 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims abstract description 35
- 238000011282 treatment Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000008236 heating water Substances 0.000 claims abstract description 7
- 238000011010 flushing procedure Methods 0.000 claims description 58
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 238000006386 neutralization reaction Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 2
- 230000003020 moisturizing effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008030 elimination Effects 0.000 description 7
- 238000003379 elimination reaction Methods 0.000 description 7
- 239000011490 mineral wool Substances 0.000 description 7
- 239000000779 smoke Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000003595 mist Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 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
- 239000003546 flue gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000010959 steel 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
- 230000002087 whitening effect Effects 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 blast furnace washing slag water dead steam recovery systems, sluice including condenser and below condenser, the condenser top is connected with air-introduced machine, the condenser bottom end is equipped with air intake port cover, it is successively arranged spray equipment from bottom to top inside the condenser, condensing unit and heating device, bottom is equipped with collector in the condenser, the spray equipment includes several spray pipings, the spray piping is equipped with spray head, the spray piping passes through feeding spraying pump respectively and is connected with the first cooling tower and water supply tank, the collector is connected by water treatment facilities with the first cooling tower, the condensing unit includes heat exchanger, the heat exchanger is connected with circulating cooling system；The heating device includes that exhaust gas reheater device is connected by tail gas heating water supplying pipe with force (forcing) pump.The invention has the advantages that: while disappearing white processing, the discharge of pollutant is reduced, the moisturizing that the condensed water for the white recycling that disappears is run as system saves water.
Description
Technical Field
The invention relates to the technical field of waste heat recovery, in particular to a waste steam recovery system for slag flushing water of an iron-making blast furnace.
Background
The domestic blast furnace slag flushing of iron and steel enterprises mainly comprises an advection method, a bottom filtration method, a Tura method, an Indian bus (INBA) method and the like, the domestic large blast furnace slag flushing is mainly based on 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 latent heat of vaporization and accounts for about 80 percent of the total heat), and a large amount of white smoke or white steam is formed when the part of exhaust steam is emptied; unlike the relatively simple 'white smoke' in 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 acidic gases such as hydrogen sulfide, sulfur dioxide, disulfide trioxide and the like generated during slag flushing and dust such as mineral wool and the like, the gases and impurities are mixed with water vapor in the exhaust gas to form acidic aerosol, and the acidic aerosol is discharged into the air to cause serious environmental pollution to the environment and needs to be removed while the 'white smoke' is eliminated.
In order to treat haze pollution, people pay attention to 'white elimination' treatment of exhaust steam and flue gas, the treatment standard and the requirement for the white elimination of the exhaust steam are met, but the 'white elimination' treatment technology only pays attention to the elimination of white smoke (water vapor) in the exhaust steam in the initial treatment process, but pays attention to the elimination of dust and acid gas and the recycling of water and heat energy in the exhaust steam.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides an iron-making blast furnace slag flushing water exhaust steam recovery system which can recycle the heat energy of condensed water and slag flushing water while performing slag flushing exhaust steam whitening treatment and eliminate the pollution of acid corrosive gas and mineral wool dust.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the waste steam recovery system for the slag flushing water of the iron-making blast furnace 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, an air inlet mask is installed at the bottom end of the condenser, a spraying device, a condensing device and a heating device are sequentially arranged in the condenser from bottom to top, a collector is arranged at the bottom in the condenser, the spraying device comprises a plurality of spraying pipelines, spraying heads are arranged on the spraying pipelines, the spraying pipelines are respectively connected with a first cooling tower and a water supplementing tank through a spraying water pump, 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 connected with the pressure pump through a tail gas heating water supply pipe.
Further, the water treatment device comprises a condensation water tank, the condensation water tank is connected with a second-speed green filter through a mixed water pump, and the second-speed 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.
Furthermore, a first-stage filter and a first quick-drying filter are sequentially connected between the pressurizing pump and the tail gas heating water supply pipe.
Furthermore, a water inlet pipeline of spraying water is connected between the spraying pipeline and the spraying water pump.
Furthermore, a collecting pipe is connected between the collector and the condensation water tank, a PH value detection device is arranged in the collecting pipe, and a neutralization dosing device for containing PH value regulating solution is connected to the water inlet pipeline.
Further, the neutralization dosing device is connected with a dosing pump.
Furthermore, a slag outlet of the slag flushing channel is provided with a second detection device.
Furthermore, a softened water treatment device is connected between the first cooling tower and the second speed green filter.
The invention has the beneficial effects that: and the discharge of pollutants is reduced while the white water is removed, and the condensed water recovered by white water removal is used as the water supplement for 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 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an ironmaking blast furnace slag flushing water exhaust steam recovery system according to an embodiment of the invention.
In the figure: 1. Flushing a slag channel; 2. an induced draft fan; 3. an air inlet mask; 4. a spray pipe; 5. a shower head; 6. a first cooling tower; 7. a water replenishing tank; 8. a heat exchanger; 9. a second cooling tower; 10. a water circulating pump; 11. a condensation water tank; 12. a mixed water pump; 13. an exhaust gas reheater; 14. a first quick-drying filter; 15. a pressure pump; 16. a second-speed cyan filter; 17. a softened water treatment device; 18. a collection pipe; 19. a water inlet pipe; 20. a dosing pump; 21. an adjustment device; 22. the tail gas heats the water supply pipe; 23. a primary filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, the system for recovering the spent steam of the slag flushing water of the iron-making 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 in a thin and high cuboid tower-shaped structure, the inner wall of the condenser is made of corrosion-resistant metal materials, a large-scale draught fan 2 is installed at the top of the condenser, the draught fan 2 is used for sucking a large amount of the spent steam of the slag flushing ditch 1 into the condenser, an expanded air inlet cover 3 is arranged at the bottom of the condenser, the air inlet cover 3 covers the slag flushing ditch, and when the spent steam of the slag flushing in the slag flushing ditch 1 is generated, the spent steam of the slag flushing is sucked into the condenser by negative pressure generated by the draught fan 2; the condenser is internally provided with a spray device, a condensing device and a heating device in sequence from bottom to top, the bottom in the condenser is provided with a collector, the spray device consists of a plurality of layers of spray heads 5 and spray pipelines 4, the spray heads 5 are high-pressure water mist spray heads 5, namely the spray device comprises a plurality of spray pipelines 4, the spray pipelines 4 are provided with the spray heads 5, the spray pipelines 4 are respectively connected with a first cooling tower 6 and a water supplementing tank 7 through spray water pumps 5, the collector is connected with a mixed water pump 12 through a condensation water tank 11, the mixed water pump 12 is connected with the first cooling tower 6 through a second-speed green filter 16, the condensing device comprises a heat exchanger 8, wherein the heat exchanger 8 is a group of high-efficiency heat exchangers, one end of the heat exchanger 8 is connected with a second cooling tower 9 through a circulating water return pipe, the second cooling tower 9 is connected with a circulating water supply pipe through, 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 which is connected with a pressure pump 15 through a tail gas heating supply pipe 22, the tail gas reheater 13 is also a group of efficient heat exchangers, the tail gas reheater is completely whitened through the heating device, the flushing slag exhaust steam is further cooled and dehumidified by a circulating cooling system and enters the heating device, the temperature of the exhaust steam is increased again through the tail gas reheater 13, the exhaust steam is discharged in a humidity unsaturated state, white smoke is completely eliminated, a heat source of the tail gas reheater 13 adopts high-temperature flushing slag water which flows back in the flushing slag pool, and the flushing slag backwater returns to the flushing slag pool after passing through a bottom filter layer; the induced draft fan 2 forms negative pressure in the condenser, introduce most exhaust steam into the condenser, realize the cooling condensation of spraying water and spray cleaning successively through the spray piping 4 and shower head 5 of the spray water section, through the cooling condensation and gas-water separation of the condensing unit, exhaust gas heats the water supply pipe 22 and discharges into the atmosphere in the heating device, collect the spray water of the spray device and condensate water of the condensing unit together and form mixed water, a part of mixed water is filtered through the second-speed green filter 16, can remove impurity such as mineral wool, iron, suspended solid in the mixed water, after cooling process through the first cooling tower 6, return to the condensing unit again as the spray water; in order to avoid the water mist of the spray water from cleaning the suspended matters of the mineral wool contained in the flushing waste steam and returning the mixed water to the condensation water tank 11, a second-speed green filter 16 is arranged on a water outlet pipeline of the condensation water tank 11 to remove the solid impurities such as the mineral wool.
In an embodiment of the present invention, a primary filter 23 and a first quick-drying filter 14 are sequentially connected between the pressure pump 15 and the exhaust gas heating water supply pipe 22, and by this scheme, most suspended impurities in the flushing water are removed, and a large amount of iron ions are still contained in the water, so a first quick-drying filter 14 needs to be installed on the exhaust gas heating water supply pipe 22, wherein the first quick-drying filter 14 is a quick-drying high-temperature iron removal filter for removing iron ions in the water to protect the exhaust gas reheater 13.
In an embodiment of the present invention, a water inlet pipe 19 for spraying water is connected between the spraying pipe 4 and the spraying water pump 5.
In a specific embodiment of the invention, because the flushing waste steam contains acidic corrosive gas and mineral wool and other pollutants, a neutralization and dosing device 21 for containing a pH value regulating liquid is installed 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 the mixed effluent of condensed water and spray water, and a pH value detection device is arranged in the collecting pipe 18 and can detect in real time, and a detection signal is input into a variable frequency controller of a pH value regulating medicament dosing pump, so that the pH value of the mixed backwater can be regulated and controlled within a reasonable regulation and control range at any time.
In a specific embodiment of the invention, the neutralization and chemical-adding device 21 is connected with a chemical-adding pump 20, the chemical-adding pump 20 can automatically add the alkaline water treatment chemical into the water inlet pipeline 19 of the spray water to perform chemical reaction with the slag flushing exhaust gas, and the chemical-adding amount can be automatically controlled by the pH value of the mixed return water, so that the alkaline water treatment chemical is added more accurately and accurately.
In one embodiment of the invention, the slag hole of the slag runner is provided with a second detection device, the second detection device is a thermometer, the change of temperature can be monitored online in real time, the start and stop of the system and the operation load can be controlled in time, the thermometer adopts an infrared thermometer for online detection, when the temperature of slag water at the slag hole is rapidly increased to be higher than 95 ℃, the situation that a large amount of steam exhaust begins to be generated when the slag hole begins to flush slag operation of a blast furnace is shown, and the white slag elimination system automatically begins to operate at the highest load.
In an embodiment of the invention, a softened water treatment device 17 is connected between the first cooling tower 6 and the second-speed green filter 16, and the rest mixed water is added into the slag flushing pool to be reused for flushing slag.
In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.
When the system is used specifically, when the slag flushing exhaust steam in the slag flushing ditch 1 is generated, the negative pressure generated by the draught fan 2 sucks the exhaust steam into the condenser, and the exhaust steam passes through the spraying device, the condensing device and the heating device in sequence after entering the condenser; wherein,
a spraying device: the slag flushing exhaust steam firstly enters a spraying device at the bottom in the condenser, when the spraying device works, a spraying water pump 5 adds spraying water cooled by a water replenishing tank 7 and a first cooling tower 6 into a spraying system through pressurization, the spraying water is sprayed in a water mist shape by a spraying head 5 and is mixed with the slag flushing exhaust gas sucked into the condenser for cooling, a large amount of low-temperature spraying water condenses high-temperature steam in the high-temperature exhaust steam into water mist (small water droplets), a part of the small water droplets are mixed and gathered with the spraying water mist and are sprayed into a collector at the bottom of the condenser, the spraying water in the collector is mixed with condensed water collected by a condensing device and is guided out of equipment, the mixed water of the spraying water and the condensed water flowing out of the condenser flows into a water treatment device and then is input into the first cooling tower 6 for cooling, and is sprayed into a spraying pipeline 4 in the condenser by the spraying water pump 5 again to form a stable working cycle;
a condensing device: the high-temperature water vapor in the slag flushing exhaust steam after passing through the spraying device, the acid gas and the slag wool are basically removed, but the cooled exhaust steam still contains a large amount of high-temperature saturated steam which needs to be removed by a condensing device at the middle section, the condensing device in the condenser comprises a heat exchanger 8, wherein the heat exchanger 8 is a high-efficiency heat exchanger 8, a steam-water separator (a water baffle) is arranged in the high-efficiency 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, when high-temperature exhaust steam passes through a condensing device, the steam-water separator is contacted with a heat exchanger 8, supersaturated water vapor in the slag flushing exhaust steam is condensed into small water drops again after heat exchange and temperature reduction, finally the small water drops in the slag flushing exhaust steam are subjected to steam-water separation by a steam-water separator (water baffle), and the blocked condensed water and mixed water of a spraying device are discharged out of the condenser together; 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, and cooling water brings out heat absorbed by the heat exchanger 8, and the heat is dissipated by the second cooling tower 9 and then returns to the heat exchanger 8 again for circulating operation;
a heating device: after being treated by the condensing device, the low-temperature exhaust steam containing saturated steam enters a heating device at the tail end of the condenser, the heating device is also a group of efficient heat exchangers, the low-temperature exhaust steam is heated again, so that the saturated steam in the exhaust steam becomes an unsaturated steam state, and finally the exhaust steam discharged to the atmosphere does not generate a white smoke phenomenon;
the process of blast furnace slag flushing is not continuous and stable, but is a periodic operation mode, a large amount of slag flushing exhaust steam is generated when slag flushing is started, but the exhaust steam quantity is gradually reduced along with gradual temperature reduction of slag, so that the induced draft fan 2 and the circulating water pump 10 both adopt variable frequency motors, real-time online monitoring is carried out by detecting the temperature change at the slag flushing ditch outlet, the tail end exhaust port and the like of key positions, and the start, stop and operation load of a system are controlled in time. The thermometer at the slag outlet of the slag flushing groove adopts an infrared thermometer for on-line detection, when the temperature of slag water at the slag outlet is rapidly increased to be more than 95 ℃, the result shows that a large amount of exhaust steam begins to be generated when the blast furnace begins to carry out slag flushing operation, and at the moment, the white-removing system automatically begins to run at the highest load, and simultaneously increases the spray water amount and the cooling water circulation amount; along with the gradual reduction of the temperature of the slag outlet, the system automatically and synchronously reduces the load operation, and reduces the spraying water quantity and the circulating quantity of the circulating pump; the control system has a certain range setting and adjusting function, after the system runs for a period of time, according to the actual environment condition, on the premise of ensuring good 'white elimination' treatment effect, the power consumption load and the spraying water quantity are reduced to the maximum extent, the running cost is saved, and in addition, in an emergency situation, the automatic control system can be changed into an emergency mode of manual operation, and the system runs at full load.
In conclusion, by means of the technical scheme, pollutant discharge is reduced while the white water is removed, and the condensed water recovered by white water removal is used as water supplement for system operation, so that water is saved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An exhaust steam recovery system for slag flushing water of an iron-making blast furnace comprises a condenser and a slag flushing ditch (1) positioned below the condenser, it is characterized in that the top end of the condenser is connected with a draught fan (2), the bottom end of the condenser is provided with an air inlet mask (3), the condenser is internally provided with a spraying device, a condensing device and a heating device in sequence from bottom to top, the bottom in the condenser is provided with a collector, the spraying device comprises a plurality of spraying pipelines (4), a spraying head (5) is arranged on each spraying pipeline (4), the spray pipeline (4) is respectively connected with a first cooling tower (6) and a water replenishing tank (7) through a spray water pump (5), the collector is connected with a first cooling tower (6) through a water treatment device, the condensing device comprises a heat exchanger (8), and the heat exchanger (8) is connected with a circulating cooling system; the heating device comprises a tail gas reheater (13) connected with a pressure pump (15) through a tail gas heating water supply pipe (22).
2. The exhaust steam recovery system for the slag flushing water of the iron-making blast furnace as claimed in claim 1, wherein the water treatment device comprises a condensation water tank (11), the condensation water tank (11) is connected with a second-speed green filter (16) through a mixing water pump (12), and the second-speed green filter (16) is connected with the first cooling tower (6).
3. The system for recovering the dead steam of the slag flushing water of the iron-making blast furnace as claimed in 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 system for recovering the dead steam of the slag flushing water of the iron-making blast furnace as claimed in claim 1, wherein a primary filter (23) and a first quick-response filter (14) are connected between the pressure pump (15) and the tail gas heating water supply pipe (22) in sequence.
5. The system for recovering the dead steam of the slag flushing water of the iron-making blast furnace as claimed in claim 1, wherein a water inlet pipeline (19) of spray water is connected between the spray pipeline (4) and the spray water pump (5).
6. The system for recovering the dead steam of the slag flushing water of the iron-making blast furnace as claimed in claim 2, wherein a collecting pipe (18) is connected between the collector and the condensation water tank (11), a PH value detection device is arranged in the collecting pipe (18), and a neutralization and dosing device (21) for containing a PH value regulating solution is connected to the water inlet pipeline (19).
7. The system for recovering the spent steam of the slag flushing water of the iron-making blast furnace as claimed in claim 6, wherein the neutralization dosing device (21) is connected with a dosing pump (20).
8. The system for recovering the spent steam of the slag flushing water of the iron-making blast furnace as claimed in claim 1, wherein a slag outlet of the slag flushing channel is provided with a second detection device.
9. The system for recovering the dead steam of the slag flushing water of the iron-making blast furnace as claimed in claim 2, wherein a softened water treatment device (17) is connected between the first cooling tower (6) and the second speed 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 true CN109457065A (en) | 2019-03-12 |
| CN109457065B CN109457065B (en) | 2023-11-10 |
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| 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145945A (en) * | 2019-04-16 | 2019-08-20 | 浙江菲达环保科技股份有限公司 | A kind of blast furnace slag flushing steam based on residual heat heating disappears white system and method |
| CN112553387A (en) * | 2020-12-11 | 2021-03-26 | 浙江菲达环保科技股份有限公司 | Device and method for water quenching and smoke treatment of high-temperature metallurgical slag |
| 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 |
| 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 |
| CN114912230A (en) * | 2022-03-29 | 2022-08-16 | 青岛科技大学 | Continuous execution path design method, device and process for water-saving clean production technology |
| CN116972652A (en) * | 2023-07-28 | 2023-10-31 | 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 |
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| CN110145945A (en) * | 2019-04-16 | 2019-08-20 | 浙江菲达环保科技股份有限公司 | A kind of blast furnace slag flushing steam based on residual heat heating disappears white system and method |
| 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 |
| CN112553387A (en) * | 2020-12-11 | 2021-03-26 | 浙江菲达环保科技股份有限公司 | Device and method for water quenching and smoke treatment of high-temperature metallurgical slag |
| 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 |
| CN114912230A (en) * | 2022-03-29 | 2022-08-16 | 青岛科技大学 | Continuous execution path design method, device and process for water-saving clean production technology |
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| CN116972652A (en) * | 2023-07-28 | 2023-10-31 | 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 |
| 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 |
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