CN117258448A - Flue gas purifying equipment and method for copper smelting matte and converting slag after wind quenching treatment - Google Patents
Flue gas purifying equipment and method for copper smelting matte and converting slag after wind quenching treatment Download PDFInfo
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- CN117258448A CN117258448A CN202311328448.1A CN202311328448A CN117258448A CN 117258448 A CN117258448 A CN 117258448A CN 202311328448 A CN202311328448 A CN 202311328448A CN 117258448 A CN117258448 A CN 117258448A
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- 239000003546 flue gas Substances 0.000 title claims abstract description 135
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000010791 quenching Methods 0.000 title claims abstract description 84
- 230000000171 quenching effect Effects 0.000 title claims abstract description 84
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 57
- 239000010949 copper Substances 0.000 title claims abstract description 57
- 238000003723 Smelting Methods 0.000 title claims abstract description 47
- 239000002893 slag Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 114
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000005406 washing Methods 0.000 claims abstract description 22
- 238000000746 purification Methods 0.000 claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 18
- 230000009467 reduction Effects 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims description 28
- 229920005989 resin Polymers 0.000 claims description 28
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 17
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000011449 brick Substances 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 10
- 230000007797 corrosion Effects 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 7
- 230000023556 desulfurization Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 239000012779 reinforcing material Substances 0.000 claims description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- 239000013505 freshwater Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000001502 supplementing effect Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
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- 239000002245 particle Substances 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- 241000233805 Phoenix Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910052947 chalcocite Inorganic materials 0.000 description 1
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 1
- 229910052951 chalcopyrite Inorganic materials 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a copper smelting matte and converting slag wind quenching post-treatment flue gas purification device and a method, wherein the copper smelting wind quenching flue gas purification device is a double-inlet turbulent washing tower and is used for purifying and dedusting smelting flue gas, and the device comprises a tower body, a reverse spray pipe, a spray head, a ripple compensator and the like; the invention is used for treating two air quenching flue gas from copper smelting, the pretreated matte air quenching flue gas enters a No. 1 reverse spray pipe, converting slag air quenching flue gas enters a No. 2 reverse spray pipe, the flue gas enters the reverse spray pipe from top to bottom at high speed through a transition section of a turbulent flushing tower, circulating liquid in the tower is reversely sprayed into the air flow from bottom to top through three spray heads of a plum petal structure, the two phases of gas and liquid are reversely collided at high speed, most of mineral dust in the flue gas can be effectively removed, and the matte air quenching flue gas and converting slag air quenching flue gas are respectively and independently air-inlet, so that the flue gas purification process is optimized, namely the flue gas dust removal and the temperature reduction are achieved, the equipment investment is reduced as much as possible, the equipment operation cost is reduced, and the purposes of energy conservation and consumption reduction are achieved.
Description
Technical Field
The invention relates to the technical field of copper smelting flue gas purification treatment, in particular to flue gas purification equipment after copper smelting matte and converting slag wind quenching treatment.
Background
Copper ore refers to a general term of available copper-containing natural mineral aggregate, copper ore is generally an aggregate formed by sulfide or oxide of copper and other minerals, and comprises natural copper, chalcopyrite, chalcocite and the like, copper ore mined from copper ore is beneficiated into copper concentrate with higher copper content, the copper concentrate needs smelting and purifying to be refined copper and copper products, a large amount of sulfur-containing high-temperature flue gas can be generated in the copper smelting process, and cooling and desulfurizing operations are needed to be carried out in order to ensure that the emission meets the environmental protection requirements.
At present, most of existing treatment equipment for copper smelting wind quenching flue gas purification is a dynamic wave scrubber, in the dynamic wave scrubbing process, the impurity content in circulating liquid is continuously increased, and in order to ensure dynamic wave scrubbing efficiency, the dynamic wave circulating liquid is discharged out of a system in an open circuit so as to maintain the balance of the impurity content in the circulating liquid.
However, most of the existing dynamic wave washers are single-channel air inlet, the purification efficiency is relatively low by not more than 80%, the adaptability to complex smoke is poor, the content of impurities in the purified smoke is high, and the rear-end production is very unfavorable. The existing copper smelting air quenching flue gas treatment method is characterized in that matte air quenching flue gas and converting slag air quenching flue gas are treated independently, dust removal and cooling operation are carried out at one time through a dynamic wave scrubber, equipment investment is high, occupied area is large, system operation energy consumption is large, and flue gas treatment cost is high.
Disclosure of Invention
The invention provides a flue gas purifying device for copper smelting matte and blowing slag after wind quenching treatment, which can solve the technical problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the flue gas purifying equipment after wind quenching treatment of copper smelting matte and converting slag comprises a tower body, a reverse spray pipe, a spray head and a ripple compensator;
the tower body is made of FRP and is divided into an inner surface corrosion-resistant layer, a secondary inner surface corrosion-resistant layer, a reinforced structure layer and a weather-resistant layer from inside to outside;
the inner surface corrosion-resistant layer adopts high temperature resistant vinyl resin, the reinforcing material adopts polyester surface felt, the resin content is more than 90%, and the thickness is 0.5mm;
the secondary inner surface corrosion-resistant layer adopts high temperature resistant vinyl resin, the reinforcing material adopts polyester fiber cloth and polyester chopped strand mats, the resin content is 70% -80%, and the thickness is 2mm;
the reinforced structure layer adopts high-temperature resistant vinyl resin, the reinforced material adopts medium-alkali untwisted glass fiber cloth and glass fiber chopped strand mats, the resin content is 30% -40%, and the thickness is 28mm;
the weather-resistant layer adopts 34# unsaturated gel coat resin, the reinforcing material adopts glass fiber surface felt, the resin content is more than 90%, and the thickness is 1.5mm;
the tower body is integrally wound and formed on site by adopting FRP, the inside is of a laminated sealing structure, the tower bottom is paved with resin mortar to form a slope, and the upper layer of the resin mortar is paved with glass fiber reinforced plastics for protecting the tower bottom and exhausting acid mud at the bottom of the tower.
In the flue gas purifying equipment after copper smelting matte and converting slag wind quenching treatment, the reverse spray pipe is divided into a No. 1 reverse spray pipe and a No. 2 reverse spray pipe; the No. 1 reverse jet pipe consists of a reverse jet section and a straight pipe section, wherein the reverse jet section is made of FRP (fiber reinforced plastic) and graphite bricks, the lower part of the reverse jet section is connected with the straight pipe section, the straight pipe section is made of wear-resistant, high-temperature-resistant and high-strength carbon fibers and special resin, and the lower part of the straight pipe section is connected with the tower body; the 2# reverse jet pipe consists of a transition section, an overflow weir, a reverse jet section and a straight pipe section, wherein the transition section is formed by lining F40 (thickness is 2 mm) on a Q235 steel shell, then lining a supporting plate on the bottom, the material is SMO254, the thickness is 2mm, then lining graphite bricks, the overflow weir is made of FRP+graphite bricks, a groove is formed in the overflow weir, the overflow weir adopts tangential liquid inlet to enable circulating liquid entering the overflow weir to flow in the anticlockwise direction, a sewage discharge pipeline with the same pipe diameter as that of the upper liquid is arranged at the bottom, the lower part of the overflow weir is connected with the reverse jet section, the reverse jet section is made of FRP+graphite bricks, the lower part of the reverse jet section is connected with the straight pipe section, and the lower part of the reverse jet pipe section is made of wear-resistant, high-temperature-resistant and high-strength carbon fiber and special resin; the No. 1 reverse spray pipe and the No. 2 reverse spray pipe are arranged on the tower body at 90 degrees, the pretreated matte wind quenching flue gas enters the No. 1 reverse spray pipe, and the slag wind quenching flue gas enters the No. 2 reverse spray pipe;
the corrugated compensator is arranged at the joint of the reverse spraying section and the straight pipe section of the reverse spraying pipe;
the spray head is arranged at the lower part of the reverse spray section of the reverse spray pipe and is connected with a circulating liquid pipeline outside the tower.
In the copper smelting wind quenching flue gas purification equipment, the spray heads are divided into a No. 1 spray head and a No. 2 spray head; the No. 1 spray head consists of 3 spray nozzles, the spray nozzles are of plum blossom valve structures and are made of F4 materials, and the 3 spray nozzles are positioned at the lower part of the reverse spray section of the No. 1 reverse spray pipe and are arranged in a regular triangle; the No. 2 spray head consists of 3 main nozzles and 1 accident nozzle, the nozzles are of plum blossom valve structures and are made of F4 materials, 4 nozzles are positioned at the lower part of the reverse spray section of the No. 2 reverse spray pipe, the 3 main nozzles are arranged in a regular triangle, and the accident nozzle is positioned at the center of the regular triangle of the main nozzle arrangement;
in the copper smelting wind quenching flue gas purification equipment, the ripple compensator is a polytetrafluoroethylene composite compensator and is made of tetrachloroethylene, and the ripple compensator is arranged at the joint of the reverse spraying section and the straight pipe section of the reverse spraying pipe;
in the copper smelting wind quenching flue gas purification equipment, the temperature of the pre-treated matte wind quenching flue gas is less than 90 ℃, and the temperature of the slag wind quenching flue gas is less than 120 ℃; the pretreated matte air quenching flue gas and slag air quenching flue gas enter the tower body through No. 1 and No. 2 reverse spray pipes, and the flue gas subjected to dust removal and temperature reduction is uniformly discharged to a downstream desulfurization procedure through a passage port above the tower body.
On the other hand, the working method of the copper smelting wind quenching flue gas purification equipment comprises the following specific steps:
(1) The copper smelting pretreated matte wind quenching flue gas is pumped to a No. 1 reverse spray pipe of wind quenching flue gas purifying equipment by an exhaust fan, the pretreated matte wind quenching flue gas is closely contacted with circulating liquid reversely sprayed by a No. 1 spray head to form a foam area, high-efficiency mass transfer and heat transfer occur, the flue gas is cooled and washed in an adiabatic manner, impurities are removed, the purposes of purifying the flue gas and reducing the temperature of the flue gas are achieved, most of washing liquid directly enters a tower body of the equipment for recycling, and a small part of washing liquid is periodically discharged out of the tower body, fresh water is supplemented, so that the solid content of circulating liquid in the tower body is reduced;
(2) Copper smelting slag wind quenching flue gas is pumped to a No. 2 reverse spray pipe of wind quenching flue gas purification equipment through an exhaust fan, slag wind quenching flue gas is closely contacted with circulating liquid reversely sprayed by a No. 2 spray nozzle to form a foam area, high-efficiency mass transfer and heat transfer occur, the flue gas is cooled and washed in an adiabatic manner and impurities are removed, part of circulating liquid flows to a No. 2 reverse spray pipe overflow weir and moves along the inner wall of the No. 2 reverse spray pipe in a tangential direction from top to bottom, a layer of film is formed on the inner wall of the No. 2 reverse spray pipe, the No. 2 reverse spray pipe is protected from being damaged by imported high Wen Zhafeng quenching flue gas, most of washing liquid directly enters the tower body of the equipment for recycling, and a small part of washing liquid is periodically discharged out of the tower body and supplemented with fresh water, so that the solid content of circulating liquid in the tower body is reduced;
(3) After dust removal and temperature reduction are carried out on two streams of flue gas in the # 1 reverse spray pipe and the # 2 reverse spray pipe respectively, the two streams of flue gas are converged in the tower body of the copper smelting wind quenching flue gas purification equipment, the temperature of the flue gas is reduced to 83 ℃, and the purified flue gas is uniformly discharged to a downstream desulfurization process through a passage opening at the top of the tower body.
According to the technical scheme, the copper smelting matte and converting slag wind quenching treatment flue gas purifying equipment comprises a tower body, a reverse spray pipe, a spray head, a ripple compensator and the like; the invention is used for treating two air quenching flue gas from copper smelting, the pretreated matte air quenching flue gas enters a No. 1 reverse spray pipe, converting slag air quenching flue gas enters a No. 2 reverse spray pipe, the flue gas enters the reverse spray pipe from top to bottom at high speed through a transition section of a turbulent flushing tower, circulating liquid in the tower is reversely sprayed into the air flow from bottom to top through three spray heads of a plum petal structure, the two phases of gas and liquid are reversely collided at high speed, most of mineral dust in the flue gas can be effectively removed, and the matte air quenching flue gas and converting slag air quenching flue gas are respectively and independently air-inlet, so that the flue gas purification process is optimized, namely the flue gas dust removal and the temperature reduction are achieved, the equipment investment is reduced as much as possible, the equipment operation cost is reduced, and the purposes of energy conservation and consumption reduction are achieved.
In general, the invention aims to provide a flue gas purifying device after wind quenching treatment of copper smelting matte and converting slag. The copper smelting wind quenching flue gas purification equipment is a double-inlet turbulent washing tower, the matte wind quenching flue gas and the converting slag wind quenching flue gas are respectively and independently inlet, the common flow equipment is optimized, the flue gas purification flow is improved to more than 85%, the equipment investment is reduced, the system operation energy consumption is reduced, the flue gas treatment cost is reduced, and the purposes of energy conservation and consumption reduction are achieved.
Drawings
FIG. 1 is a schematic structural diagram of a copper smelting wind quenching flue gas purifying device according to an embodiment of the invention;
FIG. 2 is a top view of a copper smelting wind quenching flue gas cleaning device according to an embodiment of the invention;
FIG. 3 is a cross-sectional view of a No. 1 spray head in a copper smelting wind quenching flue gas cleaning device according to an embodiment of the invention;
FIG. 4 is a cross-sectional view of a No. 2 spray head in a copper smelting wind quenching flue gas cleaning device according to an embodiment of the invention;
reference numerals illustrate:
a smoke inlet, b smoke inlet, c circulating liquid outlet, d 1-31 # spray head inlet, e sewage outlet, f standby port, g overflow weir sewage outlet, h 1-32 # spray head inlet, j 1-2 instrument detection port,
l 1-2 in-situ liquid level detection ports, m 1-6 manholes, v overflow ports, p accident nozzle inlets, i 1-4 overflow weir water inlets, k 1-4 overflow weir water outlets, n 1-4 overflow weir inspection ports, q gas outlets, 1 tower body, 2, 1# reverse jet pipe reverse jet section, 3, 1# reverse jet pipe straight pipe section, 4, 2# reverse jet pipe transition section, 5, 2# reverse jet pipe overflow weir, 6, 2# reverse jet pipe reverse jet section, 7, 2# reverse jet pipe straight pipe section, 8, 1# jet head, 9, 2# jet head, 10, 15 accident nozzles, 11, 12 ripple compensators, 13, 1# jet head nozzle, 14, 2# jet head nozzle.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
As shown in fig. 1 and 2, the flue gas purifying device after wind quenching treatment of copper smelting matte and converting slag mainly comprises a tower body, a reverse spray pipe, a spray head and a ripple compensator; the tower body is integrally wound and molded on site by adopting FRP (fiber reinforced Plastic), the inside of the tower body is divided into an inner surface corrosion-resistant layer, a secondary inner surface corrosion-resistant layer, a reinforced structure layer and a weather-resistant layer from inside to outside, the tower bottom is paved with resin mortar for slope, and the upper layer of the resin mortar is paved with glass fiber reinforced plastic for protecting the tower bottom and exhausting acid sludge at the bottom of the tower; the reverse jet pipe comprises a No. 1 reverse jet pipe and a No. 2 reverse jet pipe, wherein the No. 1 reverse jet pipe consists of a reverse jet section and a straight pipe section, the reverse jet section is made of FRP+graphite bricks, the lower part of the reverse jet section is connected with the straight pipe section, the straight pipe section is made of wear-resistant, high-temperature-resistant and high-strength carbon fibers and special resin, and the lower part of the straight pipe section is connected with the tower body; the 2# reverse jet pipe consists of a transition section, an overflow weir, a reverse jet section and a straight pipe section, wherein the transition section is formed by lining F40 of a Q235 steel shell, namely ethylene-tetrafluoroethylene copolymer (thickness is 2 mm), then lining a supporting plate at the bottom, wherein the material is SMO254, namely six-molybdenum super austenitic stainless steel, the thickness is 2mm, then lining graphite bricks, the overflow weir is made of FRP+graphite bricks, a groove is formed in the overflow weir, tangential liquid inlet is adopted by the overflow weir, circulating liquid entering the overflow weir flows in a anticlockwise direction, a sewage draining pipeline with the same pipe diameter as the upper liquid is arranged at the bottom, the lower part of the overflow weir is connected with the reverse jet section, the reverse jet section is made of FRP+graphite bricks, the lower part of the reverse jet section is connected with the straight pipe section, and the straight pipe section is made of wear-resistant, high-temperature-resistant and high-strength carbon fibers and special resin, and can bear uninterrupted long-time scouring of the circulating liquid, and the lower part of the straight pipe section is connected with a tower body; the No. 1 spray head consists of 3 spray nozzles made of polytetrafluoroethylene F4 materials, and the 3 spray nozzles are positioned at the lower part of the reverse spray section of the No. 1 reverse spray pipe and are arranged in a regular triangle. The No. 2 spray head consists of 3 main nozzles and 1 accident nozzle, and is made of F4 material, wherein the 4 nozzles are positioned at the lower part of the No. 2 reverse spray pipe reverse spray section, the 3 main nozzles are arranged in a regular triangle, and the accident nozzle is positioned at the center of the regular triangle of the main nozzle arrangement; the corrugated compensator is arranged at the joint of the reverse spraying section and the straight pipe section of the reverse spraying pipe and is made of tetrachloro+rubber; the corrugated compensator is used for axial compensation of the reverse jet pipe, has large compensation quantity, strong self-guiding and super-strong bending resistance, can compensate thermal displacement, mechanical deformation and absorb various mechanical vibrations of the reverse jet pipe, and plays roles of reducing deformation stress of the reverse jet pipe and prolonging the service life of the reverse jet pipe.
The No. 1 reverse spray pipe and the No. 2 reverse spray pipe are arranged at 90 degrees on the tower body, the pretreated matte wind quenching flue gas enters the No. 1 reverse spray pipe, the slag wind quenching flue gas enters the No. 2 reverse spray pipe, and the arrangement of the gas inlet mode ensures that when two wind quenching flue gas are independently or simultaneously inlet, the two flue gas cannot flow upwards and are mutually connected, and the flue gas enters the reverse spray pipe for cooling and dedusting and can be smoothly discharged out of the tower to enter a downstream desulfurization process;
the spray head is arranged at the lower part of the reverse spray section of the reverse spray pipe and is connected with a circulating liquid pipeline outside the tower.
The flue gas purification method after wind quenching treatment of copper smelting matte and converting slag in the embodiment comprises the following specific processes:
the copper smelting matte wind quenching dust-containing flue gas enters a No. 1 reverse spray pipe of a turbulent washing tower and collides with liquid reversely sprayed by a No. 1 spray head, so that the liquid is forced to radiate from inside to outside to the cylinder wall, a foam area with a certain height is established at a gas-liquid interface, and as the flue gas contacts with the surface of the liquid which is large in area and is continuously updated, particle trapping and gas absorption occur in the foam area, and heat transfer is correspondingly carried out, so that the cooling and dust removal of the flue gas are achieved. And the copper smelting slag blowing and air quenching flue gas is pumped to a turbulent washing tower No. 2 reverse spray pipe through a slag air quenching exhaust fan, and the flue gas is cooled in an adiabatic manner, washed and sundries are removed. The two flue gas flows are converged in a turbulent washing tower body, then the flue gas enters a gas-liquid separation tank for gas-liquid separation, most of washing liquid directly enters the turbulent washing tower for recycling, and a small part of washing liquid is periodically discharged out of the tower body and supplemented with fresh water, so that the solid content of circulating liquid in the tower body is reduced, the concentration of separated gas particles is less than 75mg/Nm, the temperature of the flue gas is reduced to 83 ℃, and the treated flue gas enters a downstream desulfurization process;
the following examples are given:
treating dust-containing flue gas generated after copper smelting matte and converting slag wind quenching treatment:
the equipment is used for treating two strands of phoenix quenching flue gas from matte granulation and converting slag granulation of smelting profession, and the flue gas is sent to a desulfurization working section after the purposes of dust removal, dehumidification and temperature reduction are achieved. The main equipment comprises a tower body, a reverse spray pipe, a spray head, a ripple compensator and the like; the dust removal and washing of the No. 1 reverse spray pipe of the matte granulating wind quenching flue gas entering the turbulent washing tower, the dust removal and washing of the No. 2 reverse spray pipe of the converting slag granulating wind quenching flue gas entering the turbulent washing tower, and the No. 1 reverse spray pipe and the No. 2 reverse spray pipe are arranged at 90 degrees on the tower body, so that when two wind quenching flue gases are independently or simultaneously inlet, the two flue gases cannot flow in a top flow and are mutually connected, and after the flue gases enter the reverse spray pipe for cooling and dust removal, the flue gases can be smoothly discharged out of the tower and enter a downstream desulfurization procedure. After the flue gas is dedusted and washed, the dust content of the flue gas is less than 75mg/Nm3, the temperature of the flue gas is less than 83 ℃, and the main components of the flue gas are matte, iron, calcium oxide, copper and the like.
In summary, the embodiment of the invention is used for treating two air quenching flue gas from copper smelting, the pretreated matte air quenching flue gas enters the No. 1 reverse spray pipe, slag air quenching flue gas enters the No. 2 reverse spray pipe, the flue gas enters the reverse spray pipe from top to bottom through the transition section of the turbulent flushing tower, circulating liquid in the tower is reversely sprayed into the air flow from bottom to top through three spray heads of a plum petal structure, gas-liquid two phases are reversely collided at high speed, most of mineral dust in the flue gas can be effectively removed, and the matte air quenching flue gas and the blowing slag air quenching flue gas are respectively and independently inlet to share purifying equipment, so that the flue gas purifying process is optimized, namely the flue gas dust removal and the temperature reduction are achieved, the equipment investment is reduced as much as possible, the equipment operation cost is reduced, and the purposes of energy conservation and consumption reduction are achieved.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The flue gas purifying device after wind quenching treatment of copper smelting matte and converting slag comprises a tower body, a reverse spray pipe, a spray head and a ripple compensator, and is characterized in that,
the reverse jet pipe is divided into a 1# reverse jet pipe and a 2# reverse jet pipe; the No. 1 reverse jet pipe consists of a reverse jet section and a straight pipe section, wherein the reverse jet section is made of FRP (fiber reinforced plastic) and graphite bricks, the lower part of the reverse jet section is connected with the straight pipe section, the straight pipe section is made of wear-resistant, high-temperature-resistant and high-strength carbon fibers and special resin, and the lower part of the straight pipe section is connected with the tower body;
the 2# reverse jet pipe consists of a transition section, an overflow weir, a reverse jet section and a straight pipe section, wherein the transition section is formed by lining F40 on a Q235 steel shell, then lining a supporting plate at the bottom, the material is SMO254, the thickness is 2mm, and then lining graphite bricks, the overflow weir is made of FRP+ graphite bricks, a groove is arranged in the overflow weir, the overflow weir adopts tangential liquid inlet to enable circulating liquid entering the overflow weir to flow in the anticlockwise direction, a sewage discharge pipeline with the same pipe diameter as that of the upper liquid is arranged at the bottom, the lower part of the overflow weir is connected with the reverse jet section, the reverse jet section is made of FRP+ graphite bricks, the lower part of the reverse jet section is connected with the straight pipe section, and the straight pipe section of the reverse jet pipe is made of wear-resistant, high-temperature-resistant and high-strength carbon fiber and special resin, and the lower part of the straight pipe section is connected with a tower body;
the No. 1 reverse spray pipe and the No. 2 reverse spray pipe are arranged on the tower body at 90 degrees, the pretreated matte wind quenching flue gas enters the No. 1 reverse spray pipe, and the converting slag wind quenching flue gas enters the No. 2 reverse spray pipe;
the corrugated compensator is arranged at the joint of the reverse spraying section and the straight pipe section of the reverse spraying pipe;
the spray head is arranged at the lower part of the reverse spray section of the reverse spray pipe and is connected with a circulating liquid pipeline outside the tower.
2. The flue gas cleaning equipment after copper smelting matte and converting slag wind quenching treatment according to claim 1, which is characterized in that: the tower body is made of FRP and is divided into an inner surface corrosion-resistant layer, a secondary inner surface corrosion-resistant layer, a reinforced structure layer and a weather-resistant layer from inside to outside;
the inner surface corrosion-resistant layer adopts high temperature resistant vinyl resin, the reinforcing material adopts polyester surface felt, the resin content is more than 90%, and the thickness is 0.5mm;
the secondary inner surface corrosion-resistant layer adopts high temperature resistant vinyl resin, the reinforcing material adopts polyester fiber cloth and polyester chopped strand mats, the resin content is 70% -80%, and the thickness is 2mm;
the reinforced structure layer adopts high-temperature resistant vinyl resin, the reinforced material adopts medium-alkali untwisted glass fiber cloth and glass fiber chopped strand mats, the resin content is 30% -40%, and the thickness is 28mm;
the weather-proof layer adopts 34# unsaturated gel coat resin, the reinforcing material adopts glass fiber surface felt, the resin content is more than 90%, and the thickness is 1.5mm.
3. The flue gas cleaning equipment after copper smelting matte and converting slag wind quenching treatment according to claim 1, which is characterized in that: the tower body is integrally wound and formed on site by adopting FRP, the inside is of a laminated sealing structure, the tower bottom is paved with resin mortar to form a slope, and the upper layer of the resin mortar is paved with glass fiber reinforced plastics for protecting the tower bottom and exhausting acid mud at the bottom of the tower.
4. The flue gas cleaning equipment after copper smelting matte and converting slag wind quenching treatment according to claim 1, which is characterized in that: the spray heads are divided into a 1# spray head and a 2# spray head;
the No. 1 spray head consists of 3 spray nozzles, the spray nozzles are of plum blossom valve structures and are made of polytetrafluoroethylene F4 materials, and the 3 spray nozzles are positioned at the lower part of the reverse spray section of the No. 1 reverse spray pipe and are arranged in a regular triangle;
the No. 2 spray head consists of 3 main nozzles and 1 accident nozzle, the nozzles are of plum blossom valve structures and made of F4 materials, the 4 nozzles are positioned at the lower part of the reverse spray section of the No. 2 reverse spray pipe, the 3 main nozzles are arranged in a regular triangle, and the accident nozzle is positioned at the center of the regular triangle of the main nozzle arrangement.
5. The flue gas cleaning equipment after copper smelting matte and converting slag wind quenching treatment according to claim 1, which is characterized in that:
the ripple compensator is a polytetrafluoroethylene composite compensator and is made of tetrachloro+rubber.
6. A method for purifying flue gas after wind quenching treatment of copper smelting matte and converting slag, which adopts the flue gas purifying device after wind quenching treatment of copper smelting matte and converting slag according to any one of claims 1-5, and is characterized in that: comprises the steps of,
s1, pumping matte wind quenching flue gas subjected to copper smelting pretreatment to a No. 1 reverse spray pipe of wind quenching flue gas purification equipment by an exhaust fan, closely contacting the pretreated matte wind quenching flue gas with circulating liquid reversely sprayed by a No. 1 spray head to form a foam area, carrying out mass transfer and heat transfer, and carrying out adiabatic cooling, washing and sundries removal on the flue gas to achieve the purposes of purifying the flue gas and reducing the temperature of the flue gas, wherein most of washing liquid directly enters a tower body of the equipment for recycling, and a small part of washing liquid is periodically discharged out of the tower body, supplemented with fresh water and used for reducing the solid content of circulating liquid in the tower body;
s2, pumping copper smelting slag wind quenching flue gas to a No. 2 reverse spray pipe of wind quenching flue gas purification equipment through an exhaust fan, enabling the slag wind quenching flue gas to be in close contact with circulating liquid reversely sprayed by a No. 2 spray nozzle to form a foam area, carrying out mass transfer and heat transfer, enabling the flue gas to be cooled in an adiabatic manner, washing and removing impurities, enabling part of circulating liquid to flow to a No. 2 reverse spray pipe overflow weir, enabling the inner wall of the No. 2 reverse spray pipe to move in a tangential direction from top to bottom, forming a layer of film on the inner wall of the No. 2 reverse spray pipe, protecting the No. 2 reverse spray pipe from being damaged by imported high Wen Zhafeng quenching flue gas, enabling most of washing liquid to directly enter the tower body of the equipment for recycling, enabling a small part of washing liquid to be discharged out of the tower body periodically, supplementing fresh water, and reducing the solid content of circulating liquid in the tower body;
s3, after dust removal and temperature reduction of two streams of flue gas in the # 1 reverse spray pipe and the # 2 reverse spray pipe respectively, converging the two streams of flue gas in the tower body of the copper smelting wind quenching flue gas purification equipment, reducing the temperature of the flue gas to 83 ℃, and uniformly discharging the purified flue gas to a downstream desulfurization process through a passage opening at the top of the tower body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311328448.1A CN117258448A (en) | 2023-10-13 | 2023-10-13 | Flue gas purifying equipment and method for copper smelting matte and converting slag after wind quenching treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311328448.1A CN117258448A (en) | 2023-10-13 | 2023-10-13 | Flue gas purifying equipment and method for copper smelting matte and converting slag after wind quenching treatment |
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| CN117258448A true CN117258448A (en) | 2023-12-22 |
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| CN202311328448.1A Pending CN117258448A (en) | 2023-10-13 | 2023-10-13 | Flue gas purifying equipment and method for copper smelting matte and converting slag after wind quenching treatment |
Country Status (1)
| Country | Link |
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| CN (1) | CN117258448A (en) |
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- 2023-10-13 CN CN202311328448.1A patent/CN117258448A/en active Pending
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