CN113880268A - Sterilization and algae removal treatment method for cooling water of thermal power plant - Google Patents
Sterilization and algae removal treatment method for cooling water of thermal power plant Download PDFInfo
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- CN113880268A CN113880268A CN202111122559.8A CN202111122559A CN113880268A CN 113880268 A CN113880268 A CN 113880268A CN 202111122559 A CN202111122559 A CN 202111122559A CN 113880268 A CN113880268 A CN 113880268A
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- 239000000498 cooling water Substances 0.000 title claims abstract description 61
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 34
- 241000195493 Cryptophyta Species 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 26
- 238000005260 corrosion Methods 0.000 claims abstract description 86
- 230000007797 corrosion Effects 0.000 claims abstract description 86
- 239000002455 scale inhibitor Substances 0.000 claims abstract description 53
- 239000000460 chlorine Substances 0.000 claims abstract description 51
- 239000003139 biocide Substances 0.000 claims abstract description 43
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims abstract description 40
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical group OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000012964 benzotriazole Substances 0.000 claims abstract description 40
- 230000003115 biocidal effect Effects 0.000 claims abstract description 36
- 239000003112 inhibitor Substances 0.000 claims abstract description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052802 copper Inorganic materials 0.000 claims abstract description 32
- 239000010949 copper Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 27
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 19
- OSVXSBDYLRYLIG-UHFFFAOYSA-N chlorine dioxide Inorganic materials O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000007062 hydrolysis Effects 0.000 claims abstract description 15
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 15
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 15
- PQRDTUFVDILINV-UHFFFAOYSA-N bcdmh Chemical compound CC1(C)N(Cl)C(=O)N(Br)C1=O PQRDTUFVDILINV-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005286 illumination Methods 0.000 claims abstract description 13
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 46
- 230000007246 mechanism Effects 0.000 claims description 32
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 30
- 238000012545 processing Methods 0.000 claims description 18
- 244000309464 bull Species 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- WJRBRSLFGCUECM-UHFFFAOYSA-N hydantoin Chemical compound O=C1CNC(=O)N1 WJRBRSLFGCUECM-UHFFFAOYSA-N 0.000 claims description 3
- 229940091173 hydantoin Drugs 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 238000003672 processing method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 230000005764 inhibitory process Effects 0.000 abstract description 7
- 150000003839 salts Chemical class 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 description 43
- 230000003647 oxidation Effects 0.000 description 42
- 238000000354 decomposition reaction Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 229910019142 PO4 Inorganic materials 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- 229910019093 NaOCl Inorganic materials 0.000 description 3
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 125000000621 oxo-lambda(3)-chloranyloxy group Chemical group *OCl=O 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004457 water analysis Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- NHYCGSASNAIGLD-UHFFFAOYSA-N Chlorine monoxide Chemical compound Cl[O] NHYCGSASNAIGLD-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- CUILPNURFADTPE-UHFFFAOYSA-N hypobromous acid Chemical compound BrO CUILPNURFADTPE-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007248 oxidative elimination reaction Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- YRIZYWQGELRKNT-UHFFFAOYSA-N 1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione Chemical compound ClN1C(=O)N(Cl)C(=O)N(Cl)C1=O YRIZYWQGELRKNT-UHFFFAOYSA-N 0.000 description 1
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 239000003619 algicide Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 229910001902 chlorine oxide Inorganic materials 0.000 description 1
- MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Chemical compound ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229950009390 symclosene Drugs 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004879 turbidimetry Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps: adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to be 20-60 ℃ to carry out hydrolysis treatment for 80-110h under the illumination condition; the corrosion and scale inhibitor is amino trimethylene phosphonic acid, hydroxy ethylidene diphosphonic acid (HEDP) or polyacrylic acid; the copper corrosion inhibitor is benzotriazole; the biocide is Br2、ClO2Bromochlorodimethylhydantoin; the corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 1-7 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L. The sterilization and algae removal treatment method for the cooling water of the thermal power plant has the characteristics of high stability, long corrosion inhibition time, good sterilization and algae removal effects and capability of meeting the use requirements of the cooling water with high salt concentration.
Description
Technical Field
The invention relates to the technical field of condensed water treatment of thermal power plants, in particular to a sterilization and algae removal treatment method for cooling water of a thermal power plant.
Background
In the production process of the thermal power plant, a large amount of cooling water with high salinity is generated to be treated based on the requirement of heat exchange. The main tasks of the circulating cooling water treatment are scale inhibition, corrosion prevention and killing, and the former two are collectively called water quality stabilization treatment. At present, the scaling and corrosion are generally controlled by adding chemical agents into cooling water, and the chemical agents are called corrosion and scale inhibitors and comprise scale inhibitors and corrosion inhibitors. In order to prevent the propagation of microorganisms and the generation of biological slime, the cooling water must be sterilized and algae-killed (i.e. biocidal). The sterilization algicide used by most domestic enterprises is an oxidizing biocide, particularly chlorine oxide such as chlorine, bleaching powder, sodium hypochlorite, chlorine dioxide and trichloroisocyanuric acid. When the oxidizing biocide is added, the oxidation effect of the oxidizing biocide on the corrosion and scale inhibitor must be considered so as to prevent the corrosion and scale inhibitor from losing effectiveness. .
Disclosure of Invention
The invention aims to provide a sterilization and algae removal treatment method for cooling water of a thermal power plant, which has the characteristics of high stability, long corrosion inhibition time, good sterilization and algae removal effects and capability of meeting the use requirements of the cooling water with high salt concentration.
The invention can be realized by the following technical scheme:
the invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to be 20-60 ℃ to carry out hydrolysis treatment for 80-110h under the illumination condition;
the corrosion and scale inhibitor is amino trimethylene phosphonic Acid (ATMP), hydroxyethylidene diphosphonic acid (HEDP) or polyacrylic acid (PAA); the copper corrosion inhibitor is Benzotriazole (BTA); the biocide is Br2、ClO2Bromochlorodimethyl hydantoin;
the corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 1-7 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
Further, the dosing concentrations of the corrosion and scale inhibitor are respectively as follows: 15-25mg/L of amino trimethylene phosphonic acid, 15-25mg/L of hydroxyethylidene diphosphonic acid and 20-30mg/L of polyacrylic acid.
Further, the dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole accounts for 20-30 mg/L.
Further, the concentrations of the biocides administered were: br2Is 13-21mg/L of ClO210-18mg/L, 20-30mg/L of bromochlorodimethyl hydantoin.
Further, the pH value of the cooling water is 6-9; the concentration multiple K value of the cooling water is 1-4.
The invention also provides a device for protecting the sterilization and algae removal processing method, which comprises a processing frame, a water inlet pipe, a mixing cavity, a heating plate, a chemical feeding pipe, a feeding pipe and a mixing mechanism, wherein a control panel is arranged at the right end of the processing frame, a power supply lead is fixed at the rear end of the processing frame, the mixing mechanism is arranged at the front end of the processing frame and comprises a driving mechanism, a rotating shaft, a first bearing seat, a first worm wheel, a fixed seat, a protective plate and a mixing roller, the driving mechanism is arranged at the left end of the processing frame, the driving mechanism is connected with the left end of the rotating shaft, the rotating shaft is movably connected with the inner side of the first bearing seat, the upper end of the rotating shaft is provided with the first worm, the first worm is meshed with the bottom of the first worm wheel for transmission, the mixing roller synchronously rotates along with the middle part of the first worm wheel, and the mixing roller is rotatably connected with the inner side of the fixed seat, the fixed seat is fixed with the top of the protection plate.
Further, handle the frame and be connected with the inlet tube right-hand member, handle the inside hybrid chamber that has seted up of frame, the hybrid chamber front end is provided with the hot plate, the dosing pipe is installed to the hybrid chamber upper end, the hybrid chamber rear end is fixed with the inlet pipe.
Further, actuating mechanism includes motor, bull stick, second worm, secondary bearing frame, second worm wheel and accepts the board, the motor is connected with the processing frame left end, the motor is connected with the bull stick left end, the bull stick right-hand member is provided with the second worm, bull stick and the inboard normal running fit of secondary bearing frame, the second worm and the meshing transmission of second worm wheel bottom, second worm wheel rear end is provided with accepts the board.
Furthermore, the cross section of the bearing plate is U-shaped, and a rotating shaft penetrates through the inner side of the bearing plate.
Further, the number of the first worms is four, and the first worms are distributed at equal intervals along the horizontal direction of the upper end of the rotating shaft.
Further, four first worm upper ends all are provided with first worm wheel, fixing base and mixing roller to first worm and axis of rotation all are located the protection shield inboard.
Further, the second worm and the second worm wheel are distributed in parallel, and the second worm is meshed with the bottom of the second worm wheel.
Further, the number of the first bearing seats is two, and the rotating shaft penetrates through the inner side of the first bearing seats.
Furthermore, the rotating shaft is made of carbon steel and has high hardness.
Furthermore, the first worm and the first worm wheel are both made of gear steel and have high wear resistance.
The invention relates to a sterilization and algae removal treatment method for cooling water of a thermal power plant, which has the following beneficial effects:
according to the invention, the corrosion and scale inhibitor, the copper corrosion inhibitor and the biocide are fully combined with the influence of illumination, temperature, pH, water quality, residual chlorine amount and coexisting substances, so that the effects of sterilization and algae removal are met, the decomposition rate and the oxidation rate are considered, the added medicaments are ensured not to have opposite effects with each other, the stability is higher, the corrosion inhibition effect is better, the medicament dosage is reduced, and the cooling water treatment cost is reduced.
In the invention, the method relates to the following device with the advantages that: firstly, through having set up mixing mechanism in processing frame upper end, actuating mechanism drives the axis of rotation and rotates in first bearing frame inboard, make the axis of rotation drive first worm wheel through first worm and rotate, thereby make first worm wheel drive the mixing roller and rotate in the fixing base inboard, thereby make the mixing roller mix the solution of mixing intracavity, the advantage that can increase the algae removal efficiency that disinfects has been reached, secondly, through having set up actuating mechanism in mixing mechanism inboard, the motor circular telegram is worked, drive the bull stick and rotate, make the bull stick drive the second worm wheel through the second worm and rotate, make the second worm wheel drive the axis of rotation and rotate, reached and to have driven the axis of rotation fast and carry out the advantage of linkage.
Drawings
FIG. 1 is a schematic structural view of example 6 of the present invention;
FIG. 2 is a schematic perspective view of a mixing mechanism according to embodiment 6 of the present invention;
FIG. 3 is a schematic partial sectional view of a mixing mechanism according to embodiment 6 of the present invention;
FIG. 4 is a partial structural view of a mixing mechanism according to embodiment 6 of the present invention;
fig. 5 is a schematic perspective view of a driving mechanism according to embodiment 6 of the present invention.
Wherein: the device comprises a processing frame-1, a control panel-2, a power supply lead-3, a water inlet pipe-4, a mixing cavity-5, a heating plate-6, a dosing pipe-7, a feeding pipe-8, a mixing mechanism-9, a driving mechanism-91, a rotating shaft-92, a first bearing seat-93, a first worm-94, a first worm wheel-95, a fixed seat-96, a protection plate-97, a mixing roller-98, a motor-911, a rotating rod-912, a second worm-913, a second bearing seat-914, a second worm wheel-915 and a bearing plate-916.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following provides a detailed description of the product of the present invention with reference to the examples.
The invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to be 20-60 ℃ to carry out hydrolysis treatment for 80-110h under the illumination condition;
the corrosion and scale inhibitor is amino trimethylene phosphonic Acid (ATMP), hydroxyethylidene diphosphonic acid (HEDP) or polyacrylic acid (PAA); the copper corrosion inhibitor is Benzotriazole (BTA); the biocide is Br2、ClO2Bromochlorodimethyl hydantoin;
the corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 1-7 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
Further, the dosing concentrations of the corrosion and scale inhibitor are respectively as follows: 15-25mg/L of amino trimethylene phosphonic acid, 15-25mg/L of hydroxyethylidene diphosphonic acid and 20-30mg/L of polyacrylic acid;
further, the dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole accounts for 20-30 mg/L.
Further, the concentrations of the biocides administered were: br2Is 13-21mg/L of ClO210-18mg/L, 20-30mg/L of bromochlorodimethyl hydantoin.
Further, the pH value of the cooling water is 6-9; the concentration multiple K value of the cooling water is 1-4.
Example 1
The invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to be 60 ℃ to perform hydrolysis treatment for 90 hours under the illumination condition;
the corrosion and scale inhibitor is amino trimethylene phosphonic Acid (ATMP); the copper corrosion inhibitor is Benzotriazole (BTA); the biocide is ClO2；
The corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 3 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
In bookIn the embodiment, the dosing concentrations of the corrosion and scale inhibitor are respectively as follows: the amino trimethylene phosphonic acid content was 25 mg/L. The dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole content is 30 mg/L. The concentrations of the biocides administered were: ClO2Is 18 mg/L. The pH value of the cooling water is 6-9; the cooling water had a multiple of concentration K of 2.
Example 2
The invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to 460 ℃ to perform hydrolysis treatment for 80-h under the illumination condition;
the corrosion and scale inhibitor is hydroxyethylidene diphosphonic acid (HEDP); the copper corrosion inhibitor is Benzotriazole (BTA); the biocide is bromochlorodimethyl hydantoin;
the corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 5 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
In this embodiment, the corrosion and scale inhibitor is administered in the following concentrations: the content of hydroxyethylidene diphosphonic acid is 20 mg/L. The dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole content is 25 mg/L. The concentrations of the biocides were 25mg/L of bromochlorodimethyl hydantoin, respectively. The pH value of the cooling water is 6-9; the cooling water had a multiple of concentration K of 4.
Example 3
The invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature at 40 ℃ to carry out hydrolysis treatment for 96 hours under the illumination condition;
the corrosion and scale inhibitor is polyacrylic acid (PAA); the copper corrosion inhibitor is Benzotriazole (BTA); the biocide is ClO2；
The corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 4 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
In this embodiment, the corrosion and scale inhibitor is administered in the following concentrations: polypropyleneThe acid content was 25 mg/L. The dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole content is 20 mg/L. The concentrations of the biocides administered are ClO, respectively2Is 12 mg/L. The pH value of the cooling water is 6-9; the concentration multiple K value of the cooling water is 1-4.
Example 4
The invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to be 20 ℃ to carry out hydrolysis treatment for 110h under the illumination condition;
the corrosion and scale inhibitor is amino trimethylene phosphonic Acid (ATMP); the copper corrosion inhibitor is Benzotriazole (BTA); the biocide is Br;
the corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 6 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
In this embodiment, the corrosion and scale inhibitor is administered in the following concentrations: aminotrimethylene phosphonic acid was 18 mg/L. The dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole content is 28 mg/L. The concentrations of the biocides administered were: br2Is 18 mg/L. The pH value of the cooling water is 6-9; the cooling water had a multiple of concentration K of 1.
Example 5
The invention discloses a sterilization and algae removal treatment method for cooling water of a thermal power plant, which comprises the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to be 20-60 ℃ to carry out hydrolysis treatment for 80-110h under the illumination condition;
the corrosion and scale inhibitor is polyacrylic acid (PAA); the copper corrosion inhibitor is Benzotriazole (BTA); the biocide is ClO2；
The corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 1-7 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
In this embodiment, the corrosion and scale inhibitor is administered in the following concentrations: polyacrylic acid was 23 mg/L. The dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole content is 26 mg/L. BiocideAre respectively ClO2It was 16 mg/L. The pH value of the cooling water is 6-9; the cooling water had a multiple of concentration K of 2.
In the present invention, the selection of the corrosion and scale inhibitor is mainly based on the following aspects:
(1) effect of hydrolysis Rate
The hydrolysis rates of HEDP, ATMP and PAA were measured at 20 deg.C, 40 deg.C and 60 deg.C, respectively. The initial concentrations of ATMP, HEDP and PAA were all 20mg/L during the measurement, no NaClO was added, i.e. DClIs 0mgCl2And L. Test case surface: the stability of the three scale inhibitors is as follows from big to small: PAA>>HEDP > ATMP. In the test, after 53 hours, the materials are decomposed by 0.03%, 1.74% and 2.43% in sequence, and have better stability.
(2) Oxidation rate:
the measurement conditions were: the temperature is 40 ℃, the initial concentrations of ATMP, HEDP and PAA are 20mg/L, DClIs 1mgCl2And L. Shows that: similar to the hydrolysis situation, the chlorine oxidation resistance of the three scale inhibitors is in the order of: PAA>HEDP > ATMP. After e.g. 96h, they are decomposed by 0.12%, 4.70% and 9.87% in that order.
The difference in oxidation resistance of the three scale inhibitors is determined by the stability of their molecular structures. The stability of C-C bond in PAA molecule is better than that of C-N bond and C-P bond in HEDP and ATMP molecule. Their bond energy is in turn: 345.6, 304.68 and 263.6 kJ/mol. Potential scanning of HEDP and ATMP solutions with linear scanning potentials in the range of 0.0-1.6V revealed that HEDP has only one oxidation potential of 1.5V, whereas ATMP has two oxidation potentials: 1.15 and 1.5V, it is estimated that the oxidation potentials of the C-N bond and the C-P bond in ATMP are 1.15V and 1.5V, respectively, and therefore, the HEDP of only the C-P bond is stronger in oxidation resistance than that of ATMP having both the C-N bond and the C-P bond.
(3) Influence of temperature
In the invention, the temperature has obvious influence on the oxidation rate of the organic phosphine scale inhibitor in the system, and after oxidation for 96 hours, the HEDP oxidation rates at 40 ℃ and 60 ℃ are respectively 4.70 percent and 19.03 percent, while the ATMP oxidation rates are respectively 9.87 percent and 23.89 percent, namely the temperature is increased by 20 ℃, and the HEDP and ATMP oxidation rates are respectively increased by about 3 times and 1.4 times. However, HEDP is still more resistant to oxidation than ATMP under different temperature conditions.
(4) Influence of residual chlorine amount
D was determined at 40 ℃ and 48h oxidation timeClInfluence on the Oxidation Rate of the Scale inhibitor, PAA even at DClUp to 8mgCl2the/L is also stable, the oxidation rate is only 0.45%, while the oxidation rates of HEDP and ATMP are almost the same as DClIncreasing in a straight line relationship, DClFrom 1mgCl2Increasing the concentration of/L to 8mgCl2The oxidation rates of/L, HEDP and ATMP increased by 9.1-fold and 3.4-fold, respectively. Although HEDP is greater than ATMP versus DClSensitive, but in the range tested, ATMP has a higher oxidation rate than HEDP.
(5) Residual chlorine consumption and PO4 3-Relationship of production quantities
At a temperature of 40 ℃ the starting DCl8mgCl2The consumption of residual chlorine and PO were determined at 20mg/L starting HEDP or ATMP4 3-The amount of PO produced by decomposition of the product with chlorine was found4 3-Increment (Delta PO)4 3-]mmol/L) and reduction of residual chlorine (. DELTA. [ Cl ]]mmol/L) is proportional.
For HEDP, Δ [ Cl ]]And delta [ PO ]4 3-]Is about 2, e.g. the solution delta [ Cl ] when the oxidation time is extended from 24h to 79h]0.0837mmol/L, Δ [ PO ]4 3-]The concentration was 0.0415mmol/L, i.e., the R value was 2.02. 1 HEDP molecule contains 2C-P bonds, each C-P bond requiring 1 atomic state for oxidative cleavage [ O ]]And generates 1 PO4 3-1 NaOCl can release 1 [ O ]]And because 1 molecule of NaOCl contains 2 molecules of active chlorine, delta [ Cl ]]：△[PO4 3-]Is that 2: 1.
for ATMP, R value is about 7-8, such as delta [ Cl ] in the solution when the oxidation time is prolonged from 24h to 79h]0.0543mmol/L, Δ [ PO ]4 3-]The concentration of the catalyst is 0.0071mmol/L, namely the R value is 7.65. 1 molecule of ATMP contains 3C-N bonds and 1C-P bond, and the complete oxidative cleavage of the bonds consumes 4 atomic states [ O ]]In which only C-P is cleaved to form PO4 3-. Same as aboveBy reason, complete oxidation of 1 molecule of ATMP requires 4 NaOCl, i.e., Δ [ Cl ]]：△[PO4 3-]Is 8: 1. the intermediate product and the final product of the oxidation of HEDP and ATMP by active chlorine both destroy the original molecular structure and have almost no scale inhibition capability[37]In practice, the influence should be minimized as much as possible, for example, D should be avoided as much as possibleClAnd in the peak value, the two dosing points of the biocide and the corrosion and scale inhibitor are far away as possible.
(6) Influence of light
At the beginning DCl1mgCl2L, temperature: the temperature is 30 ℃ under illumination and 40 ℃ in a dark room; the chlorine decomposition reaction of the scale inhibitor is intensified by sunlight at 20mg/L starting HEDP or ATMP, for example, the oxidation rates of HEDP and ATMP are 5.55% and 12.63% after 52h under 30 ℃ illumination, respectively, whereas the oxidation rates of HEDP and ATMP are 3.27% and 8.10% after the same time even if the temperature is raised to 40 ℃ under no light (darkroom) condition. The above results suggest that the amount of the corrosion and scale inhibitor should be increased in the sunny season or the summer with strong illumination.
(7) Influence of coexisting substances
The cooling water contains various ions, and the content of the ions is changed according to the concentration ratio, regions and seasons. The influence of the coexisting ions will be described below by taking HEDP as an example. The measurement conditions were as follows: dCl2mgCl2L, HEDP: 5mg/L, concentration of cation or anion: 200mg/L, pH8.0, temperature: 25 ℃, oxidation time: and (5) 24 h.
The measurement result shows that: different ions have a greater difference in their effect on HEDP decomposition, Na+、Fe3+And Zn2+Not significant effect, Mg2+The effect of (a) is severe. Therefore, the following steps are carried out: the influence of the cations is arranged from large to small in sequence as follows: mg (magnesium)2+>Ca2+>Na+(ii) a The order of the influence of the anions from large to small is as follows: br->SO4 2->Cl-. The reasons may be: HEDP and Ca2+、Mg2+The complex is easier to be decomposed by active chlorine oxidation after being formed[38]，Br-In aqueous solutions containing chlorine, the reaction takes place: HOCl + Br-→HOBr+Cl-Whereas HOBr has a stronger oxidizing power than HOCl in an aqueous solution at pH 8.0.
(8) Influence of pH
The higher the pH value is, the lower the content of active hypochlorous acid is, and the weaker the oxidation capacity is, namely the lower the oxidation rate of the scale inhibitor is, HEDP6.8mg/L, D in pure waterCl2mgCl2HEDP oxidation rate after pH adjustment to 6, 7, 8 and 9, respectively, at 70 deg.C/L.
In the invention, the selection of the copper corrosion inhibitor is mainly based on the comprehensive consideration of the oxidation resistance of the copper corrosion inhibitor, and specifically comprises the following steps:
(1) rate of hydrolysis
BTA has good self-stability, as shown in DCl0mgCl2At the temperature of 60 ℃, BTA is not hydrolyzed, has better stability and keeps the corrosion inhibition effect.
(2) Rate of oxidation
BTA has good chlorine and oxygen resistance even at 60 ℃ and DCl8mgCl2Under the condition of/L, only 17.8 percent of the catalyst is decomposed after 48 hours, and even if a certain amount of oxidant is contained, the corrosion inhibition effect can be kept.
(3) Influence of residual chlorine amount
BTA at 60 deg.C, DClFrom 0 to 8mgCl2The oxidation rate of 48h is increased from 0.0 percent to 17.8 percent, the influence is relatively insensitive, and in addition, the residual chlorine amount is controlled to be 8mgCl in the actual treatment process2The normal use of the corrosion inhibitor is fully ensured below L.
(4) Effect of biocide species
The concentration (mg/L) of each substance under the measurement condition is as follows: a BTA: 25; cl2：8；Br2：17；ClO2: 14; BCDMH (bromochlorodimethylhydantoin): 25; temperature: at 23 ℃. The measurement result shows that: the order of the oxidation capacity of the 4 biocides on BTA is from large to small: br2>BCDMH>ClO2>Cl2E.g. Br in 1h2And BCDMH can decompose BTA by 50% and 30%, respectively, for ClO2And Cl2Even after 48h of oxidation, the BTA decomposition rates were only 4% and 2%, respectively.
(5) Influence of acidity and hardness
In the invention, the alkalinity does not basically influence BCDMH and ClO2And Cl2Oxidative decomposition of BTA with Br2In addition, alkalinity is beneficial to reducing the decomposition rate of BTA, and the decomposition rate of BTA in unsalted water and in alkalinity 1.5mmol/L water is 80 percent and 50 percent respectively after 24 hours of oxidation under the same conditions. Hardness in water will increase Br2And BCDMH attacks BTA with little impact on ClO2And Cl2Oxidation of (2). If the hardness is increased from 0 to 7.90mmol/L, the decomposition rate of the BTA can be increased by 20-30% by BCDMH after lh.
BTA was selected for the copper corrosion inhibitor and the data relating hydrolysis rate to oxidation rate is shown in the following table:
TABLE 1 hydrolysis and Oxidation test data (in%)
Meanwhile, the quality of the cooling water adopting the method is monitored, and the results are shown in the following table:
TABLE 2 Water quality monitoring results
In the present invention, the above test procedure is specifically described as follows: under the condition that no oxidant is added into the system, the decomposition rate of the corrosion and scale inhibitor is calculated by measuring the residual amount of the corrosion and scale inhibitor; an oxidizing agent is simultaneously introduced into the cooling water system, and the oxidation rate is measured. At the same time, the following chemical analysis methods were used for the different components in the case in question: ATMP and HEDP: the oxidation product is mainly PO4 3-Therefore, GB6913.1-86 ' analysis method for boiler water and cooling water's phosphate determination orthophosphate ' is adopted; PAA: GBT14421-93 "turbidimetry for determination of polyacrylic acid for boiler Water and Cooling Water analysis methods"; dCl: GB/T14424-93 determination of residual chlorine in boiler water and cooling water analysis methods; a BTA: GB/T14422-93 ultraviolet spectrophotometry for determining benzotriazole in boiler water and cooling water analysis method.
Example 6
As shown in figures 1-5, the invention also relates to a device for the sterilization and algae removal treatment method, which comprises a treatment frame 1, a water inlet pipe 4, a mixing chamber 5, a heating plate 6, a chemical feeding pipe 7, a discharge pipe and a mixing mechanism 9, wherein a control panel 2 is arranged at the right end of the treatment frame 1, a power supply lead 3 is fixed at the rear end of the treatment frame 1, the mixing mechanism 9 is arranged at the front end of the treatment frame 1, the treatment frame 1 is connected with the right end of the water inlet pipe 4, the mixing chamber 5 is arranged in the treatment frame 1, the heating plate 6 is arranged at the front end of the mixing chamber 5, the chemical feeding pipe 7 is arranged at the upper end of the mixing chamber 5, the discharge pipe is fixed at the rear end of the mixing chamber 5, the chemical feeding pipe 7 comprises a corrosion inhibitor feeding pipe, a biocide feeding pipe and a copper corrosion inhibitor feeding pipe
Referring to fig. 2, 3 and 4, the mixing mechanism 9 includes a driving mechanism 91, a rotating shaft 92, a first bearing seat 93, a first worm 94, a first worm wheel 95, a fixing seat 96, a protection plate 97 and a mixing roller 98, the driving mechanism 91 is installed at the left end of the processing frame 1, the driving mechanism 91 is connected with the left end of the rotating shaft 92, the rotating shaft 92 is movably connected with the inner side of the first bearing seat 93, the first worm 94 is arranged at the upper end of the rotating shaft 92, the first worm 94 is engaged with the bottom of the first worm wheel 95 for transmission, the mixing roller 98 rotates synchronously with the middle of the first worm wheel 95, the mixing roller 98 is rotatably connected with the inner side of the fixing seat 96, the fixing seat 96 is fixed with the top of the protection plate 97, the first worm 94 is provided with four numbers, the first worm 94 is equidistantly distributed along the horizontal direction of the upper end of the rotating shaft 92, the first worm wheels 95, the fixing seat 96 and the mixing roller 98 are arranged at the upper ends of the four first worm wheels 94, the first worm 94 and the rotating shaft 92 are both located on the inner side of the protection plate 97, the number of the first bearing seats 93 is two, the rotating shaft 92 penetrates through the inner side of the first bearing seats 93, the rotating shaft 92 is made of carbon steel and is high in hardness, and the first worm 94 and the first worm wheel 95 are made of gear steel and are high in wear resistance.
Referring to fig. 5, the driving mechanism 91 includes a motor 911, a rotating rod 912, a second worm 913, a second bearing seat 914, a second worm wheel 915 and a bearing plate 916, the motor 911 is connected to the left end of the processing frame 1, the motor 911 is connected to the left end of the rotating rod 912, the second worm 913 is disposed at the right end of the rotating rod 912, the rotating rod 912 is rotatably engaged with the inner side of the second bearing seat 914, the second worm 913 is engaged with the bottom of the second worm wheel 915 for transmission, the bearing plate 916 is disposed at the rear end of the second worm wheel 915, the cross section of the bearing plate 916 is U-shaped, a rotating shaft 92 penetrates through the inner side of the bearing plate 916, the second worm 913 and the second worm wheel 915 are parallel to each other, and the second worm 913 is engaged with the bottom of the second worm wheel 915, which is favorable for driving the second worm wheel 915 to rotate.
The working principle of the processing device is as follows;
firstly, before use, the sterilizing and algae-removing treatment device for water treatment is horizontally placed, so that the treatment frame 1 fixedly supports the device;
secondly, when the device is used, an external power supply is connected through a power supply lead 3 to provide power for the device, and then a button at the upper end of the control panel 2 is pressed to start the device;
thirdly, a water source is discharged through a water inlet pipe 4, after the water source is complained, the chemicals can be added through a plurality of chemical adding pipes, the heating plate 6 can heat the internal solution, the temperature can be detected through a temperature sensor, and the temperature can be adjusted;
fourthly, the motor 911 is powered on to work to drive the rotating rod 912 to rotate, so that the rotating rod 912 drives the second worm wheel 915 to rotate through the second worm 913, and the second worm wheel 915 drives the rotating shaft 92 to rotate;
fifthly, the rotating shaft 92 rotates inside the first bearing seat 93, the rotating shaft 92 drives the first worm wheel 95 to rotate through the first worm 94, so that the first worm wheel 95 drives the mixing roller 98 to rotate inside the fixing seat 96, the mixing roller 98 mixes the solution in the mixing cavity 5, the sterilization and algae removal efficiency can be increased, and then the solution is discharged through the discharge pipe.
According to the sterilization and algae removal processing device, the mixing mechanism 9 is arranged at the upper end of the processing frame 1, the driving mechanism 91 drives the rotating shaft 92 to rotate on the inner side of the first bearing seat 93, so that the rotating shaft 92 drives the first worm wheel 95 to rotate through the first worm 94, the first worm wheel 95 drives the mixing roller 98 to rotate on the inner side of the fixing seat 96, the mixing roller 98 is used for mixing the solution in the mixing cavity 5, and the advantage of increasing the sterilization and algae removal efficiency is achieved; through having set up actuating mechanism 91 in mixing mechanism 9 inboard, motor 911 circular telegram is worked, drives bull stick 912 and rotates, makes bull stick 912 drive second worm wheel 915 through second worm 913 and rotates, makes second worm wheel 915 drive axis of rotation 92 and rotates, has reached and has driven axis of rotation 92 fast and has carried out the advantage of linkage.
The above embodiments are only specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (8)
1. A sterilization and algae removal treatment method for cooling water of a thermal power plant is characterized by comprising the following steps:
adding a corrosion and scale inhibitor, a copper corrosion inhibitor and a biocide into cooling water, and controlling the temperature to be 20-60 ℃ to carry out hydrolysis treatment for 80-110h under the illumination condition;
the corrosion and scale inhibitor is amino trimethylene phosphonic acid hydroxy ethylidene diphosphonic acid or polyacrylic acid; the copper corrosion inhibitor is benzotriazole; the biocide is Br2、ClO2Bromochlorodimethyl hydantoin;
the corrosion and scale inhibitor and the biocide are added in a mode of one-time impact addition in 1-7 days, and the residual chlorine amount in water is controlled to be 0.5-1 mgCl2The reaction lasts for 2-4 h under the condition of/L.
2. The method for sterilizing and removing algae of cooling water of a thermal power plant according to claim 1, wherein: the dosing concentrations of the corrosion and scale inhibitor are respectively as follows: 15-25mg/L of amino trimethylene phosphonic acid, 15-25mg/L of hydroxyethylidene diphosphonic acid and 20-30mg/L of polyacrylic acid.
3. The method for sterilizing and removing algae of cooling water of a thermal power plant according to claim 2, wherein: the dosage concentration of the copper corrosion inhibitor is as follows: the benzotriazole accounts for 20-30 mg/L.
4. The method for sterilizing and removing algae of cooling water of a thermal power plant according to claim 3, wherein: the concentrations of the biocides were: br2Is 13-21mg/L of ClO210-18mg/L, 20-30mg/L of bromochlorodimethyl hydantoin.
5. The method for sterilizing and removing algae of cooling water of a thermal power plant according to claim 4, wherein: the pH value of the cooling water is 6-9; the concentration multiple K value of the cooling water is 1-4.
6. The method for sterilizing and removing algae of cooling water of a thermal power plant according to claim 5, wherein: the sterilization and algae removal processing device used by the sterilization and algae removal processing method comprises a processing frame (1) and a mixing mechanism (9), the mixing mechanism (9) is arranged at the front end of the processing frame (1), the mixing mechanism (9) comprises a driving mechanism (91), the driving mechanism (91) is arranged at the left end of the processing frame (1), the driving mechanism (91) is connected with the left end of the rotating shaft (92), the rotating shaft (92) is movably connected with the inner side of the first bearing seat (93), the upper end of the rotating shaft (92) is provided with a first worm (94), the first worm (94) is meshed with the bottom of the first worm wheel (95) for transmission, the mixing roller (98) synchronously rotates along with the middle of the first worm wheel (95), the mixing roller (98) is rotatably connected with the inner side of the fixed seat (96), and the fixed seat (96) is fixed with the top of the protection plate (97); the mixing device is characterized in that a dosing pipe (7) is installed at the upper end of the mixing cavity (5), and the dosing pipe (7) comprises a corrosion and scale inhibitor material pipe, a biocide material pipe and a copper corrosion inhibitor material pipe.
7. The method for sterilizing and removing algae of cooling water of a thermal power plant according to claim 6, wherein: handle frame (1) and be connected with inlet tube (4) right-hand member, handle frame (1) inside hybrid chamber (5) of having seted up, hybrid chamber (5) front end is provided with hot plate (6), hybrid chamber (5) rear end is fixed with inlet pipe (8).
8. The method for sterilizing and removing algae of cooling water of a thermal power plant according to claim 7, wherein: actuating mechanism (91) includes motor (911), bull stick (912), second worm (913), second bearing seat (914), second worm wheel (915) and accepts board (916), motor (911) is connected with processing frame (1) left end, motor (911) is connected with bull stick (912) left end, bull stick (912) right-hand member is provided with second worm (913), bull stick (912) and second bearing seat (914) inboard normal running fit, second worm (913) and second worm wheel (915) bottom meshing transmission, second worm wheel (915) rear end is provided with accepts board (916).
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