CN113008046A - Accurate closed water-cooling heat exchange method - Google Patents
Accurate closed water-cooling heat exchange method Download PDFInfo
- Publication number
- CN113008046A CN113008046A CN202110259502.6A CN202110259502A CN113008046A CN 113008046 A CN113008046 A CN 113008046A CN 202110259502 A CN202110259502 A CN 202110259502A CN 113008046 A CN113008046 A CN 113008046A
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- Prior art keywords
- water
- cooling
- converter
- water jacket
- jacket
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- 238000001816 cooling Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 186
- 239000000779 smoke Substances 0.000 claims abstract description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000003546 flue gas Substances 0.000 claims abstract description 38
- 239000002918 waste heat Substances 0.000 claims abstract description 16
- 238000007664 blowing Methods 0.000 claims description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000005086 pumping Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
- C22B15/003—Bath smelting or converting
- C22B15/0041—Bath smelting or converting in converters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses an accurate closed water-cooling heat exchange method, which comprises the following steps of exchanging heat of converting flue gas generated by a converter by using a water-cooling smoke hood, wherein a smoke inlet of the water-cooling smoke hood is communicated with a smoke outlet of the converter, and the smoke outlet of the water-cooling smoke hood is connected with a waste heat boiler; the smoke inlet is provided with a temperature sensor, the water outlet of the water-cooling smoke hood is provided with a water flow sensor, the circulating pump is used for pumping circulating water into the water-cooling smoke hood, the circulating pump is electrically connected with a variable frequency controller, the converter, the temperature sensor, the water flow sensor and the variable frequency controller are respectively electrically connected with a DCS control system, the DCS control system can control the converter to turn in and turn out, and the circulating water pressure in the water-cooling smoke hood is adjusted by controlling the circulating pump through the variable frequency controller according to a temperature signal fed back by the temperature sensor. The invention can avoid the air resistance phenomenon in the converter flue gas cooling process and improve the waste heat recovery efficiency of the converter flue gas.
Description
Technical Field
The invention relates to the technical field of flue gas waste heat recovery, in particular to a precise closed water-cooling heat exchange method.
Background
Copper matte converting is an important link of copper smelting, receives copper matte in a smelting stage, and produces blister copper through converting operation of a converting furnace for supplying requirements for fire refining. The flue gas that converting operation produced has taken away 50% heat in the converting stage, and copper smelting enterprise all adopts the mode that the water-cooling petticoat pipe connects exhaust-heat boiler behind the stove to retrieve partial flue gas waste heat at present. Wherein, traditional water-cooling petticoat pipe adopts monoblock through cooling water structure, appears the air lock phenomenon easily in the use, and the cooling effect is uneven, leads to water-cooling petticoat pipe water jacket life to shorten greatly. The traditional water-cooling smoke hood adopts an open circulation mode, and the circulating water supply pressure is insufficient.
Disclosure of Invention
The invention aims to provide an accurate closed water-cooling heat exchange method, which is used for solving the problems in the prior art, avoiding the air resistance phenomenon in the converter flue gas cooling process and improving the waste heat recovery efficiency of the converter flue gas.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an accurate closed water-cooling heat exchange method, which comprises the following steps of exchanging heat of converting flue gas generated by a converter by using a water-cooling smoke hood, wherein a smoke inlet of the water-cooling smoke hood is communicated with a smoke outlet of the converter, and the smoke outlet of the water-cooling smoke hood is connected with a waste heat boiler; the inlet flue is provided with temperature sensor, the delivery port department of water-cooling petticoat pipe is provided with water flow sensor, and the circulating pump is used for doing the circulating water is gone into to the water-cooling petticoat pipe pump, the circulating pump electricity is connected with frequency conversion controller, the converter temperature sensor water flow sensor with frequency conversion controller is connected with DCS control system electricity respectively, DCS control system can control the converter changes over into, changes over out, utilizes DCS control system basis temperature signal that temperature sensor feedbacked passes through frequency conversion controller control the circulating pump is adjusted circulating water pressure in the water-cooling petticoat pipe.
Preferably, the water-cooling petticoat pipe includes preceding water jacket, back water jacket, left side water jacket and right side water jacket, preceding water jacket back water jacket the left side water jacket with the right side water jacket encloses into a both ends open-ended cavity, the opening of cavity one end does the inlet flue of water-cooling petticoat pipe, the opening of the cavity other end does the outlet flue of water-cooling petticoat pipe, the cavity is as converter converting flue gas flow extremely exhaust-heat boiler's passageway.
Preferably, the front water jacket, the rear water jacket, the left water jacket and the right water jacket are respectively formed by splicing a plurality of mutually independent water jackets, each water jacket is provided with a water inlet and a water outlet, a rib plate is arranged in each water jacket, and a water through hole is formed in each rib plate; and the water outlet of each water jacket is provided with the water flow sensor.
Preferably, the front water jacket and the rear water jacket are respectively connected with the left water jacket in a sealing manner, and the front water jacket and the rear water jacket are respectively connected with the right water jacket in a sealing manner.
Preferably, a water outlet of the pure water station is communicated with a first water inlet of the intermediate water tank, a water inlet on the water-cooling smoke hood is respectively communicated with a first water outlet of the intermediate water tank, a water outlet on the water-cooling smoke hood is respectively communicated with a second water inlet of the intermediate water tank, and a second water outlet of the intermediate water tank is communicated with a water inlet of the waste heat boiler; the water inlet on the water-cooling petticoat pipe communicates with the one end of main inlet tube through the pipeline respectively, the other end of main inlet tube with the first delivery port intercommunication of middle water tank, the circulating pump sets up on the main inlet tube.
Preferably, when the converter is fed completely and has a blowing condition, the DCS control system sends a signal to control the converter to rotate so that the converter enters a production site for production, the amount of blowing flue gas is increased in the process that the converter is rotated into production, the temperature of the blowing flue gas is gradually increased, the temperature sensor detects the temperature of the blowing flue gas in real time and converts the temperature of the blowing flue gas into an electric signal and transmits the electric signal to the DCS control system, and meanwhile, the DCS control system sends a signal to adjust the variable frequency controller to gradually adjust the circulating pump to increase the circulating water pressure to 4Mpa and stably control the circulating water pressure.
Preferably, when the converter blowing has a copper discharging condition, the DCS control system sends a signal to rotate the converter to a roll-out position, the temperature of the blown flue gas is gradually reduced after the converter rolls out, the temperature sensor detects the temperature of the blown flue gas in real time and converts the temperature of the blown flue gas into an electric signal to be transmitted to the DCS control system, and the DCS control system sends a signal to adjust the frequency conversion controller and the circulating pump to gradually adjust and control the pressure of the circulating water to be 3.5 Mpa.
Preferably, the water flow sensor detects the water outlet condition of the water-cooling smoke hood in real time and feeds the water outlet condition back to the DCS control system to realize the detection of the water outlet condition.
Compared with the prior art, the invention has the following technical effects:
the accurate closed water-cooling heat exchange method can avoid the air resistance phenomenon in the converter flue gas cooling process, and improve the waste heat recovery efficiency of the converter flue gas. Compared with the existing heat exchange method, the accurate closed water-cooling heat exchange method has the advantages that the automation degree is high, the pressure of circulating water is adjusted according to the temperature of converting flue gas, the energy is saved, the pressure of the circulating water in the closed circulating system reaches 0.35-0.4 Mpa, the closed circulating system is forced to circulate, and the circulating heat exchange effect is good. According to the precise closed water-cooling heat exchange method, the circulating water and the waste heat boiler uniformly use pure water, the water temperature is increased to 80.3 ℃ from 25 ℃ after circulating cooling, the water temperature is increased by 55.3 ℃, and the waste heat recovery efficiency of the converter flue gas is improved.
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 I of a water-cooling smoke hood in the precise closed water-cooling heat exchange method of the invention;
FIG. 2 is a schematic structural diagram II of a water-cooling smoke hood in the precise closed water-cooling heat exchange method of the invention;
FIG. 3 is a schematic structural diagram of a control system in the precise closed water-cooling heat exchange method according to the present invention;
wherein: 1. a pure water station; 2. an intermediate water tank; 3. a circulation pump; 4. a variable frequency controller; 5. a DCS control system; 6. a converter; 7. a water jacket; 701. a rib plate; 8. a vertical junction; 9. a transverse joint; 10. a smoke inlet; 11. a smoke outlet; 12. a front water jacket; 13. a rear water jacket; 14. and (4) cooling the smoke hood with water.
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, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide an accurate closed water-cooling heat exchange method, which is used for solving the problems in the prior art, avoiding the air resistance phenomenon in the converter flue gas cooling process and improving the waste heat recovery efficiency of the converter flue gas.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3: the embodiment provides an accurate closed water-cooling heat exchange method, wherein a water-cooling smoke hood 14 is used for exchanging heat of converting smoke generated by a converter 6, a smoke inlet 10 of the water-cooling smoke hood 14 is communicated with a smoke outlet 11 of the converter 6, and the smoke outlet 11 of the water-cooling smoke hood 14 is connected with a waste heat boiler; the smoke inlet 10 is provided with a temperature sensor, the water outlet of the water-cooling smoke hood 14 is provided with a water flow sensor, the circulating pump 3 is used for pumping circulating water into the water-cooling smoke hood 14, the circulating pump 3 is electrically connected with the variable frequency controller 4, the converter 6, the temperature sensor, the water flow sensor and the variable frequency controller 4 are respectively electrically connected with the DCS control system 5, the DCS control system 5 can control the converter 6 to rotate in and out, and the circulating pump 3 is controlled by the DCS control system 5 through the variable frequency controller 4 according to a temperature signal fed back by the temperature sensor to adjust the circulating water pressure in the water-cooling smoke hood 14.
The water-cooling smoke hood 14 comprises a front water jacket 12, a rear water jacket 13, a left water jacket and a right water jacket, and the vertical connecting part 8 and the transverse connecting part 9 of the adjacent water jackets 7 are connected or welded through flanges; the front water jacket 12, the rear water jacket 13, the left water jacket and the right water jacket enclose a cavity with two open ends, the opening at one end of the cavity is a smoke inlet 10 of the water-cooling smoke hood 14, the opening at the other end of the cavity is a smoke outlet 11 of the water-cooling smoke hood 14, and the cavity is used as a channel for converting smoke of the converter 6 to flow to the waste heat boiler. The front water jacket 12, the rear water jacket 13, the left water jacket and the right water jacket are respectively formed by splicing a plurality of mutually independent water jackets 7, each water jacket 7 is provided with a water inlet and a water outlet, a rib plate 701 is arranged in each water jacket 7, and a water through hole is arranged on each rib plate 701 and is used as a circulating water channel in each water jacket 7; a water flow sensor is arranged at the water outlet of each water jacket 7. The front water jacket 12 and the rear water jacket 13 are respectively connected with the left water jacket in a sealing way, and the front water jacket 12 and the rear water jacket 13 are respectively connected with the right water jacket in a sealing way.
The water outlet of the pure water station 1 is communicated with a first water inlet of the intermediate water tank 2, a water inlet on the water-cooling smoke hood 14 is respectively communicated with a first water outlet of the intermediate water tank 2, a water outlet on the water-cooling smoke hood 14 is respectively communicated with a second water inlet of the intermediate water tank 2, and a second water outlet of the intermediate water tank 2 is communicated with a water inlet of the waste heat boiler; the water inlet on the water-cooling smoke cover 14 is communicated with one end of a main water inlet pipe through a pipeline respectively, the other end of the main water inlet pipe is communicated with a first water outlet of the middle water tank 2, and the circulating pump 3 is arranged on the main water inlet pipe.
The converter 6 blows every 6 hours to form a period, the feeding stage is 1.5 hours, the blowing stage is 3 hours, and the copper discharging stage is 1.5 hours, the converter 6 is in a rotating-out state in the feeding stage and the copper discharging stage, and no blowing smoke is generated; in the blowing phase the converter 6 is in production state, producing a large amount of blowing flue gas. According to the requirements of the converting production process, the circulating water pressure is periodically controlled, wherein the circulating water pressure in the feeding stage and the copper discharging stage is controlled to be 3.5Mpa, and the circulating water pressure in the converting stage is controlled to be 4 Mpa.
The precise closed water-cooling heat exchange method of the embodiment is as follows:
when the converter 6 is fed with the blowing conditions, the DCS control system 5 sends signals to control the converter 6 to rotate so that the converter 6 enters a production site for production, the amount of blowing flue gas is increased in the process that the converter 6 is rotated into the production, the temperature of the blowing flue gas is gradually increased, a temperature sensor detects the temperature of the blowing flue gas in real time and converts the temperature into an electric signal and transmits the electric signal to the DCS control system 5, and meanwhile, the DCS control system 5 sends signals to adjust the variable frequency controller 4 to gradually adjust the circulating pump 3 to increase the pressure of circulating water to 4Mpa and stably control the circulating water;
when the converter 6 has a copper discharging condition in the blowing process, the DCS control system 5 sends a signal to rotate the converter 6 to a rotating position, the temperature of the blowing flue gas is gradually reduced after the converter 6 rotates out, the temperature sensor detects the temperature of the blowing flue gas in real time and converts the temperature of the blowing flue gas into an electric signal and transmits the electric signal to the DCS control system 5, and the DCS control system 5 sends a signal to adjust the frequency conversion controller 4 and the circulating pump 3 to gradually adjust and control the pressure of the circulating water to be 3.5 Mpa. The water flow sensor detects the water outlet condition of the water-cooling smoke hood 14 in real time and feeds the water outlet condition back to the DCS control system 5 to realize the detection of the water outlet condition. During the period, the detection electric signals of the water flow sensors at the water outlets of the water jackets 7 in the water-cooling smoke hood 14 are continuously transmitted to the DCS control system 5 to realize the detection of the water outlet condition. The novel precise closed water-cooling heat exchange control method and the control process for a complete period of the converter 6 blowing are repeated in the next converter 6 blowing period.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A precise closed water-cooling heat exchange method is characterized in that: the method comprises the following steps of (1) exchanging heat of converting flue gas generated by a converter by using a water-cooled smoke hood, wherein a smoke inlet of the water-cooled smoke hood is communicated with a smoke outlet of the converter, and the smoke outlet of the water-cooled smoke hood is connected with a waste heat boiler; the inlet flue is provided with temperature sensor, the delivery port department of water-cooling petticoat pipe is provided with water flow sensor, and the circulating pump is used for doing the circulating water is gone into to the water-cooling petticoat pipe pump, the circulating pump electricity is connected with frequency conversion controller, the converter temperature sensor water flow sensor with frequency conversion controller is connected with DCS control system electricity respectively, DCS control system can control the converter changes over into, changes over out, utilizes DCS control system basis temperature signal that temperature sensor feedbacked passes through frequency conversion controller control the circulating pump is adjusted circulating water pressure in the water-cooling petticoat pipe.
2. The accurate closed water-cooling heat exchange method according to claim 1, characterized in that: the water-cooling petticoat pipe includes preceding water jacket, back water jacket, left side water jacket and right side water jacket, preceding water jacket back water jacket left side water jacket with the right side water jacket encloses into a both ends open-ended cavity, the opening of cavity one end does the inlet flue of water-cooling petticoat pipe, the opening of the cavity other end does the outlet flue of water-cooling petticoat pipe, the cavity as converter converting flue gas flow extremely exhaust-heat boiler's passageway.
3. The accurate closed water-cooling heat exchange method according to claim 2, characterized in that: the front water jacket, the rear water jacket, the left water jacket and the right water jacket are respectively formed by splicing a plurality of mutually independent water jackets, each water jacket is provided with a water inlet and a water outlet, a rib plate is arranged in each water jacket, and a water through hole is formed in each rib plate; and the water outlet of each water jacket is provided with the water flow sensor.
4. The accurate closed water-cooling heat exchange method according to claim 2, characterized in that: the front water jacket and the rear water jacket are respectively connected with the left water jacket in a sealing manner, and the front water jacket and the rear water jacket are respectively connected with the right water jacket in a sealing manner.
5. The accurate closed water-cooling heat exchange method according to claim 2, characterized in that: the water outlet of the pure water station is communicated with a first water inlet of the intermediate water tank, the water inlet of the water-cooling smoke hood is communicated with a first water outlet of the intermediate water tank respectively, the water outlet of the water-cooling smoke hood is communicated with a second water inlet of the intermediate water tank respectively, and a second water outlet of the intermediate water tank is communicated with a water inlet of the waste heat boiler; the water inlet on the water-cooling petticoat pipe communicates with the one end of main inlet tube through the pipeline respectively, the other end of main inlet tube with the first delivery port intercommunication of middle water tank, the circulating pump sets up on the main inlet tube.
6. The accurate closed water-cooling heat exchange method according to claim 1, characterized in that: when the converter is fed with the blowing conditions, the DCS control system sends signals to control the converter to rotate so that the converter enters a production site for production, the amount of blowing flue gas is increased in the process that the converter is turned into the production, the temperature of the blowing flue gas is gradually increased, the temperature sensor detects the temperature of the blowing flue gas in real time and converts the temperature of the blowing flue gas into an electric signal to be transmitted to the DCS control system, and meanwhile, the DCS control system sends signals to adjust the variable frequency controller to gradually adjust the circulating pump to increase the circulating water pressure to 4Mpa and stably control the circulating pump.
7. The accurate closed water-cooling heat exchange method according to claim 1, characterized in that: when the converter blowing has a copper discharging condition, the DCS control system sends a signal to rotate the converter to a transferring position, the temperature of the blowing flue gas is gradually reduced after the converter is transferred out, the temperature sensor detects the temperature of the blowing flue gas in real time and converts the temperature into an electric signal and transmits the electric signal to the DCS control system, and the DCS control system sends a signal to adjust the variable frequency controller and the circulating pump to gradually adjust and control the pressure of circulating water to be 3.5 Mpa.
8. The accurate closed water-cooling heat exchange method according to claim 1, characterized in that: the water flow sensor detects the water outlet condition of the water-cooling smoke hood in real time and feeds the water outlet condition back to the DCS control system to realize detection of the water outlet condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110259502.6A CN113008046A (en) | 2021-03-10 | 2021-03-10 | Accurate closed water-cooling heat exchange method |
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| CN202110259502.6A CN113008046A (en) | 2021-03-10 | 2021-03-10 | Accurate closed water-cooling heat exchange method |
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Application publication date: 20210622 |
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