CN112340923A - Treatment system and treatment method for circulating cooling water of power plant - Google Patents
Treatment system and treatment method for circulating cooling water of power plant Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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- 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
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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- 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
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
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Abstract
The invention discloses a treatment system and a treatment method for circulating cooling water of a power plant, and the treatment system comprises a cooling water tank, wherein the cooling water tank is connected with a sedimentation tank and a sedimentation tank, the sedimentation tank is connected with a primary filtering tank, the primary filtering tank is connected with a secondary filtering tank, the secondary filtering tank is connected with a water quality stabilizing tank, the water quality stabilizing tank is connected with a pH adjusting tank, the pH adjusting tank is connected with a scale and corrosion inhibition tank, the scale and corrosion inhibition tank is connected with an electrostatic treatment tank, the electrostatic treatment tank is connected with a magnetization treatment tank, the magnetization treatment tank is connected with a precise filtering tank, and the precise filtering tank is connected with a circulating tank; the invention carries out multiple treatment on cold cutting water through the sedimentation tank, the primary filtering tank, the secondary filtering tank, the water quality stabilizing tank, the pH adjusting tank, the scale and corrosion inhibition tank, the electrostatic treatment tank, the magnetization treatment tank and the precise filtering tank, can effectively prevent scale formation, can also carry out loose dissolution on an old scale layer, and is very convenient to use.
Description
Technical Field
The invention relates to the technical field of electric field circulating cooling water treatment, in particular to a treatment system and a treatment method for circulating cooling water of a power plant.
Background
The circulating cooling water accounts for a great proportion of the total water used by the thermal power plant, and the annual water consumption of the thermal power plant with the installed capacity of one million kilowatts can reach 2000 ten thousand meters360% -80% of water consumption is mainly used for a circulating cooling system, China is a country with water resource shortage, and water source supply becomes one of bottleneck factors restricting construction and production of thermal power plants.
The thermal power generation main equipment system includes: fuel supply systems, water supply systems, steam systems, cooling systems, electrical systems, and other auxiliary treatment devices. In a cooling system, water resources are cooled and recycled, and in the long-term use process of circulating cooling water, water quality stabilizing agents, bactericides and the like are required to be added regularly so as to control scaling of the circulating cooling water system.
Based on the above, the invention designs a treatment system and a treatment method for circulating cooling water of a power plant to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a treatment system and a treatment method for circulating cooling water of a power plant, which can effectively prevent scaling and can also loosen and dissolve an old scale layer to solve the problems in the background technology by performing multiple treatment on cold cutting water through a sedimentation tank, a primary filter tank, a secondary filter tank, a water quality stabilizing tank, a pH adjusting tank, a scale and corrosion inhibition tank, an electrostatic treatment tank, a magnetization treatment tank and a precise filter tank.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a processing system for power plant's recirculated cooling water, includes cooling water tank, cooling water tank is connected with the sedimentation tank through the pipeline with the sedimentation tank, the sedimentation tank is connected with elementary filtering ponds through the pipeline, elementary filtering ponds are connected with the second grade filtering ponds through the pipeline, the second grade filtering ponds are connected with the water stabilization tank through the pipeline, the water stabilization tank is connected with the pH equalizing basin through the pipeline, the pH equalizing basin is connected with the inhibition of scale and inhibition pond through the pipeline, the inhibition of scale and inhibition pond is connected with the electrostatic treatment pond through the pipeline, the electrostatic treatment pond is connected with the magnetization treatment pond through the pipeline, the magnetization treatment pond is connected with the precision filtration pond through the pipeline, the precision filtration pond is connected with the circulation pond through the pipeline.
Preferably, the primary filter tank is filtered by quartz sand, the granularity of the quartz sand is 0.2-0.8 cm, and the secondary filter tank is filtered by a filter screen and activated carbon.
A treatment method for circulating cooling water of a power plant comprises the following steps:
s1, cooling water used by the power plant enters a cooling water tank, flows into a sedimentation tank through a pipeline, a flocculating agent is added into the sedimentation tank to flocculate and precipitate impurities in the water, a primary filtering tank carries out primary filtering on the cooling water to remove larger granular impurities in the water, a secondary filtering tank carries out secondary filtering on the cooling water, and active carbon can adsorb the impurities in the water and remove peculiar smell in the water;
s2, enabling the filtered cooling water to flow into a water quality stabilizing tank, adding a water quality stabilizer into the water quality stabilizing tank, enabling the water quality stabilizer to form a stable complex with scale forming substances such as calcium ions and magnesium ions in water, playing a good role in chelation, dispersion and corrosion inhibition, and loosening an old scale layer while preventing scaling;
s3, cooling water flows into the pH adjusting tank through the water quality stabilizing tank, and weak acid resin is added into the pH adjusting tank to adjust the pH of the cooling water, so that the hardness of carbonate can be removed, the alkalinity of the water can be reduced, and the scaling of the cooling water can be reduced;
s4, cooling water flows into the scale and corrosion inhibition pool through the pH regulation pool, and the scale and corrosion inhibitor is added into the scale and corrosion inhibition pool, and can change metal ions into chelate ions or complex ions, so that the crystal growth process of scaling substances is damaged, the crystal nucleus is prevented from increasing, and the scale is prevented from being separated out;
s5, cooling water flows into the electrostatic treatment tank through the scale and corrosion inhibition tank, the cooling water is treated by an electrostatic field in the electrostatic treatment tank to be polarized and changed into dipoles arranged in a positive and negative sequence, soluble salt ions in the cooling water can be surrounded and fixed to be far away from the metal wall surface, scaling is avoided, meanwhile, the solubility of the cooling water is enhanced, and the scaling on the metal wall surface is dissolved to a certain extent;
s6, cooling water flows into the magnetic treatment tank through the electrostatic treatment tank, the magnetic treatment tank prevents calcium and magnesium carbonate and sulfate in the cooling water from being separated out on the inner wall of the container through an electric field and a magnetic field, scaling is avoided, the cooling water flows into the precise filtration tank after being magnetized, the precise filtration tank carries out precise filtration on the cooling water, membrane filtration is adopted for precise filtration, and the cooling water after being precisely filtered flows into the circulating tank for recycling.
Preferably, the flocculating agent is PAC and PAM, has good flocculation property, can reduce the frictional resistance between liquids and is convenient for sedimentation.
Preferably, the water quality stabilizer is a mixture of a sterilization algicide, a cleaning agent, a prefilming agent, a chelating agent and a dispersing agent, the sterilization algicide can remove microorganisms in cooling water, growth of the microorganisms is avoided, dirt is prevented from being produced due to metabolism of the microorganisms, corrosion to a copper pipe is avoided, the cleaning agent can loosen water scales, cleaning of the water scales is facilitated, and the chelating agent changes metal ions into chelate ions to avoid scaling.
Preferably, the pH value is adjusted to 6.0-6.5 in the pH adjusting tank, so that the scale and corrosion inhibitor can act on water conveniently, and the using amount of the scale and corrosion inhibitor is reduced.
Preferably, the scale and corrosion inhibitor is compounded by organic phosphorus, polymer and corrosion inhibitor, wherein the organic phosphorus is sodium tripolyphosphate or sodium pyrophosphate, and the scale and corrosion inhibition effect is good.
Preferably, a plurality of groups of magnetized water treatment devices are arranged in the magnetized treatment tank, so that the magnetized treatment can be performed on water, and the maintenance cost is low.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the flocculating agent is added into the sedimentation tank to flocculate and precipitate impurities in water, and the cooling water is filtered through the primary filtering tank and the secondary filtering tank, so that the filtering effect is good, some large impurities in the cooling water can be effectively removed, and the impurities are prevented from accumulating on the inner wall of the copper pipe.
2. In the invention, the water quality stabilizer is added into the water quality stabilizing tank, and forms a stable complex with scaling substances such as calcium ions, magnesium ions and the like in water, thereby playing good roles of chelation, dispersion and corrosion inhibition, and loosening an old scale layer while preventing scaling.
3. In the invention, the scale and corrosion inhibitor is added into the scale and corrosion inhibition tank, and can change metal ions into chelate ions or complex ions, destroy the crystal growth process of scaling substances, prevent crystal nucleus from increasing and prevent scale from separating out.
4. In the invention, the electrostatic treatment pool polarizes the cooling water, changes the cooling water into dipoles arranged in a positive and negative sequence, and can surround and fix soluble salt ions in the cooling water, so that the salt ions are far away from the metal wall surface, thereby avoiding scaling, simultaneously enhancing the solubility of the cooling water and playing a certain role in dissolving the scaling on the metal wall surface.
5. In the invention, the magnetization treatment tank prevents the calcium carbonate and the magnesium sulfate in the cooling water from being separated out on the inner wall of the container through an electric field and a magnetic field, so that scaling is avoided, the cooling water flows into the precise filtering tank after magnetization treatment, the precise filtering tank carries out precise filtering on the cooling water, and the filtered water can be recycled.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of the system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution for a treatment system of circulating cooling water of a power plant: the device comprises a cooling water tank, wherein the cooling water tank is connected with a sedimentation tank through a pipeline, the sedimentation tank is connected with a primary filter tank through a pipeline, the primary filter tank is connected with a secondary filter tank through a pipeline, the secondary filter tank is connected with a water quality stabilization tank through a pipeline, the water quality stabilization tank is connected with a pH adjusting tank through a pipeline, the pH adjusting tank is connected with a scale and corrosion inhibition tank through a pipeline, the scale and corrosion inhibition tank is connected with an electrostatic treatment tank through a pipeline, the electrostatic treatment tank is connected with a magnetization treatment tank through a pipeline, the magnetization treatment tank is connected with a precise filter tank through a pipeline, and the precise filter tank is connected with a circulation tank through a pipeline.
The primary filter tank is used for filtering quartz sand, the granularity of the quartz sand is 0.2-0.8 cm, and the secondary filter tank is used for filtering through a filter screen and activated carbon.
A treatment method for circulating cooling water of a power plant comprises the following steps:
s1, cooling water used by the power plant enters a cooling water tank, flows into a sedimentation tank through a pipeline, a flocculating agent is added into the sedimentation tank to flocculate and precipitate impurities in the water, a primary filtering tank carries out primary filtering on the cooling water to remove larger granular impurities in the water, a secondary filtering tank carries out secondary filtering on the cooling water, and active carbon can adsorb the impurities in the water and remove peculiar smell in the water;
s2, enabling the filtered cooling water to flow into a water quality stabilizing tank, adding a water quality stabilizer into the water quality stabilizing tank, enabling the water quality stabilizer to form a stable complex with scale forming substances such as calcium ions and magnesium ions in water, playing a good role in chelation, dispersion and corrosion inhibition, and loosening an old scale layer while preventing scaling;
s3, cooling water flows into the pH adjusting tank through the water quality stabilizing tank, and weak acid resin is added into the pH adjusting tank to adjust the pH of the cooling water, so that the hardness of carbonate can be removed, the alkalinity of the water can be reduced, and the scaling of the cooling water can be reduced;
s4, cooling water flows into the scale and corrosion inhibition pool through the pH regulation pool, and the scale and corrosion inhibitor is added into the scale and corrosion inhibition pool, and can change metal ions into chelate ions or complex ions, so that the crystal growth process of scaling substances is damaged, the crystal nucleus is prevented from increasing, and the scale is prevented from being separated out;
s5, cooling water flows into the electrostatic treatment tank through the scale and corrosion inhibition tank, the cooling water is treated by an electrostatic field in the electrostatic treatment tank to be polarized and changed into dipoles arranged in a positive and negative sequence, soluble salt ions in the cooling water can be surrounded and fixed to be far away from the metal wall surface, scaling is avoided, meanwhile, the solubility of the cooling water is enhanced, and the scaling on the metal wall surface is dissolved to a certain extent;
s6, cooling water flows into the magnetic treatment tank through the electrostatic treatment tank, the magnetic treatment tank prevents calcium and magnesium carbonate and sulfate in the cooling water from being separated out on the inner wall of the container through an electric field and a magnetic field, scaling is avoided, the cooling water flows into the precise filtration tank after being magnetized, the precise filtration tank carries out precise filtration on the cooling water, membrane filtration is adopted for precise filtration, and the cooling water after being precisely filtered flows into the circulating tank for recycling.
Wherein, the flocculating agent is PAC and PAM, has good flocculation, can reduce the frictional resistance between the liquid, is convenient for deposit.
The water quality stabilizer is a mixture of a sterilization algicide, a cleaning agent, a prefilming agent, a chelating agent and a dispersing agent, the sterilization algicide can remove microorganisms in cooling water, growth of the microorganisms is avoided, dirt is prevented from being produced due to metabolism of the microorganisms, corrosion to a copper pipe is avoided, the cleaning agent can loosen water scales, cleaning of the water scales is facilitated, and the chelating agent changes metal ions into chelate ions to avoid scaling.
The pH value of the pH adjusting tank is adjusted to 6.0-6.5, so that the scale and corrosion inhibitor can act on water conveniently, and the using amount of the scale and corrosion inhibitor is reduced; the scale and corrosion inhibitor is compounded by organic phosphorus, polymer and corrosion inhibitor, wherein the organic phosphorus is sodium tripolyphosphate or sodium pyrophosphate, and the scale and corrosion inhibition effect is good; the magnetic treatment tank is internally provided with a plurality of groups of magnetic water treatment devices, so that the water can be magnetized, and the maintenance cost is low.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A processing system for recirculated cooling water of power plant, includes cooling water tank, its characterized in that: the cooling water tank is connected with the sedimentation tank through a pipeline, the sedimentation tank is connected with a primary filter tank through a pipeline, the primary filter tank is connected with a secondary filter tank through a pipeline, the secondary filter tank is connected with a water quality stabilization tank through a pipeline, the water quality stabilization tank is connected with a pH adjusting tank through a pipeline, the pH adjusting tank is connected with a scale and corrosion inhibition tank through a pipeline, the scale and corrosion inhibition tank is connected with an electrostatic treatment tank through a pipeline, the electrostatic treatment tank is connected with a magnetization treatment tank through a pipeline, the magnetization treatment tank is connected with a precise filter tank through a pipeline, and the precise filter tank is connected with a circulation tank through a pipeline.
2. The treatment system for the circulating cooling water of the power plant according to claim 1, characterized in that: the primary filter tank adopts quartz sand to filter, and the secondary filter tank adopts a filter screen and active carbon to filter.
3. A treatment method for circulating cooling water of a power plant is characterized by comprising the following steps:
s1, cooling water used by the power plant enters a cooling water tank, flows into a sedimentation tank through a pipeline, a flocculating agent is added into the sedimentation tank to flocculate and precipitate impurities in the water, a primary filtering tank carries out primary filtering on the cooling water to remove larger granular impurities in the water, a secondary filtering tank carries out secondary filtering on the cooling water, and active carbon can adsorb the impurities in the water and remove peculiar smell in the water;
s2, enabling the filtered cooling water to flow into a water quality stabilizing tank, adding a water quality stabilizer into the water quality stabilizing tank, enabling the water quality stabilizer to form a stable complex with scale forming substances such as calcium ions and magnesium ions in water, playing a good role in chelation, dispersion and corrosion inhibition, and loosening an old scale layer while preventing scaling;
s3, cooling water flows into the pH adjusting tank through the water quality stabilizing tank, and weak acid resin is added into the pH adjusting tank to adjust the pH of the cooling water, so that the hardness of carbonate can be removed, and the scaling of the cooling water is reduced;
s4, cooling water flows into the scale and corrosion inhibition pool through the pH regulation pool, and the scale and corrosion inhibitor is added into the scale and corrosion inhibition pool, and can change metal ions into chelate ions or complex ions, so that the crystal growth process of scaling substances is damaged, the crystal nucleus is prevented from increasing, and the scale is prevented from being separated out;
s5, cooling water flows into the electrostatic treatment tank through the scale and corrosion inhibition tank, the cooling water is treated by an electrostatic field in the electrostatic treatment tank to be polarized and changed into dipoles arranged in a positive and negative sequence, soluble salt ions in the cooling water can be surrounded and fixed to be far away from the metal wall surface, scaling is avoided, meanwhile, the solubility of the cooling water is enhanced, and the scaling on the metal wall surface is dissolved to a certain extent;
s6, cooling water flows into the magnetization treatment tank through the electrostatic treatment tank, the magnetization treatment tank prevents calcium and magnesium carbonates and sulfates in the cooling water from being separated out on the inner wall of the container through an electric field and a magnetic field, scaling is avoided, the cooling water flows into the precise filtration tank after magnetization treatment, the precise filtration tank carries out precise filtration on the cooling water, and the cooling water after precise filtration flows into the circulation tank and can be recycled.
4. The method for treating the circulating cooling water of the power plant according to claim 3, characterized in that: the flocculant is PAC and PAM.
5. The method for treating the circulating cooling water of the power plant according to claim 3, characterized in that: the water quality stabilizer is a mixture of a sterilizing algicide, a cleaning agent, a prefilming agent, a chelating agent and a dispersing agent.
6. The method for treating the circulating cooling water of the power plant according to claim 3, characterized in that: and adjusting the pH value in the pH adjusting tank to be 6.0-6.5.
7. The method for treating the circulating cooling water of the power plant according to claim 3, characterized in that: the scale and corrosion inhibitor is compounded by organic phosphorus, polymer and corrosion inhibitor, wherein the organic phosphorus is sodium tripolyphosphate or sodium pyrophosphate.
8. The method for treating the circulating cooling water of the power plant according to claim 3, characterized in that: and a plurality of groups of magnetized water treatment devices are arranged in the magnetized treatment tank.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114506931A (en) * | 2022-01-25 | 2022-05-17 | 广州中宸环保科技有限公司 | Novel pipeline corrosion and scale inhibition method and device |
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