CN110458723B - Water quality maintenance method for cast iron water supply pipeline - Google Patents
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 394
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012423 maintenance Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 38
- 238000004458 analytical method Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 238000004088 simulation Methods 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 241000894006 Bacteria Species 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims description 13
- 238000005260 corrosion Methods 0.000 claims description 13
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 6
- 241000223935 Cryptosporidium Species 0.000 claims description 5
- 102000014150 Interferons Human genes 0.000 claims description 5
- 108010050904 Interferons Proteins 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 5
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- 231100000315 carcinogenic Toxicity 0.000 claims description 5
- 230000002124 endocrine Effects 0.000 claims description 5
- 238000012851 eutrophication Methods 0.000 claims description 5
- 229940079322 interferon Drugs 0.000 claims description 5
- 231100000219 mutagenic Toxicity 0.000 claims description 5
- 230000003505 mutagenic effect Effects 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 5
- 239000002957 persistent organic pollutant Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 230000011218 segmentation Effects 0.000 claims description 5
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 241000224466 Giardia Species 0.000 claims description 2
- 238000005536 corrosion prevention Methods 0.000 claims description 2
- 230000006866 deterioration Effects 0.000 abstract description 7
- 238000009395 breeding Methods 0.000 abstract description 4
- 230000001488 breeding effect Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 4
- 244000005700 microbiome Species 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 abstract description 4
- 238000003556 assay Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 7
- 241000224467 Giardia intestinalis Species 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 229940085435 giardia lamblia Drugs 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
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- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- G—PHYSICS
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Abstract
The invention discloses a water quality maintenance method of a cast iron water supply pipeline, which comprises the following steps: selecting a cast iron water supply pipeline with the most suitable caliber; forming an annular water supply pipe network structure; the water quality of the water inlet end is preferentially monitored; controlling the pH value of water quality in a cast iron water supply pipeline at a water outlet end; performing periodic bioassimilable organic carbon assay; carrying out water flow velocity simulation analysis and field measurement and controlling the water flow state; according to the invention, water quality deterioration can be avoided from the source by preferentially monitoring the water quality in the cast iron water supply pipeline at the water inlet end, the water quality in the cast iron water supply pipeline can be reasonably managed by periodically and biologically assimilating organic carbon measurement on the water quality in the segmented cast iron water supply pipeline, meanwhile, the stability and accuracy of measured data can be improved by segmented measurement, scientific data support is provided for reasonably maintaining the water quality, and bacteria and microorganism breeding caused by the change of the water quality environment state can be avoided by maintaining the constant pH value of the water quality in the cast iron water supply pipeline.
Description
Technical Field
The invention relates to the technical field of water quality maintenance, in particular to a water quality maintenance method for a cast iron water supply pipeline.
Background
The cast iron pipe is a water supply pipe with simple construction and good sealing performance, has stronger flex resistance, expansion deformation capability and shock resistance, has wide applicability, and has unique points in the aspects of structure, performance, welding, construction, water supply and the like.
When the cast iron pipe is applied to a water supply pipeline, water can be conveyed to a user through a complex and huge water supply pipe network structure consisting of the cast iron water supply pipeline after being discharged from a water plant, the water stays in the cast iron water supply pipeline for a long time in the conveying process, the huge water supply pipe network structure is like a huge reactor, and the water can carry out various physical, chemical, electrochemical and microbial reactions in the water supply pipe network structure, wherein the reactions can possibly cause the water quality in the water supply pipe network structure to deteriorate, so that the water supply safety problem occurs, the water quality can be subjected to secondary pollution beyond the relevant national standard regulations, and the important significance is provided on how to maintain the water quality in the cast iron water supply pipeline, so that the water quality maintenance method of the cast iron water supply pipeline is provided by the invention to solve the defects in the prior art.
Disclosure of Invention
Aiming at the problems, the invention provides a water quality maintenance method of a cast iron water supply pipeline, which can avoid water quality deterioration from the source by preferentially monitoring the water quality in the cast iron water supply pipeline at the water inlet end, can reasonably manage the water quality in the cast iron water supply pipeline by periodically and biologically assimilating organic carbon measurement on the water quality in the segmented cast iron water supply pipeline, can improve the stability and the accuracy of measured data by segmenting measurement, provides scientific data support for reasonably maintaining the water quality, can avoid bacteria and microorganism breeding caused by the change of the water quality environment state by maintaining the constant pH value of the water quality in the cast iron water supply pipeline, can effectively improve the quality of the water quality, and has good water quality maintenance effect.
The invention provides a water quality maintenance method of a cast iron water supply pipeline, which comprises the following steps:
the method comprises the following steps: reasonably selecting a cast iron water supply pipeline with the most suitable caliber and corrosion resistance and bacteria resistance, and carrying out corrosion resistance enhancement treatment on a valve body and accessories used by the cast iron water supply pipeline;
step two: controlling a cast iron water supply pipeline to form an annular water supply pipe network structure at the water outlet end of a water plant;
step three: preferentially monitoring the water quality of water from a water source area entering a water inlet end pipeline of a water plant, and monitoring whether the water quality entering the water inlet end pipeline of the water plant has water eutrophication and contains persistent organic pollutants;
step four: monitoring the pH value of water entering the water supply pipe network structure from the water outlet end of the water plant, and controlling the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant to be 7.0-8.5;
step five: segmenting a water supply pipe network structure consisting of cast iron water supply pipelines, and periodically measuring the bioassimilable organic carbon in the water quality of the cast iron water supply pipelines;
step six: carrying out water flow velocity simulation analysis and field measurement on water flow in the water supply pipe network structure to obtain the water flow velocity and the retention time in the water supply pipe network structure;
step seven: and controlling the water flow state in the cast iron water supply pipeline from the water outlet end of the water plant according to the water flow velocity and the retention time in the water supply pipe network structure.
The further improvement lies in that: the corrosion prevention enhancing treatment in the step one is specifically as follows: the surface of the valve body and the surface of the fittings for the cast iron water supply pipeline are thermally sprayed with polyethylene anticorrosive paint, and an anticorrosive layer is formed on the surface of the valve body and the surfaces of the fittings for the cast iron water supply pipeline.
The further improvement lies in that: the thickness of the anticorrosive layer in the first step is controlled to be 2-3 mm.
The further improvement lies in that: the water quality monitoring content in the third step further comprises: and monitoring the water quality for the presence or absence of endocrine interferon, the presence or absence of giardia and cryptosporidium, and the presence or absence of carcinogenic, mutagenic and distortional substances.
The further improvement lies in that: and in the fourth step, the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant is controlled to be 7.3-7.8.
The further improvement lies in that: when the water supply pipe network structure consisting of the cast iron water supply pipelines is segmented in the fifth step, the segmentation principle follows: all tail end nodes of the water supply pipe network structure are segmented monitoring points, all branch nodes of the water supply pipe network structure are segmented monitoring points, and the rest water supply pipe network structure segments are arranged according to the distance to form equidistant segmented monitoring points.
The further improvement lies in that: the concrete process in the sixth step is as follows: and carrying out water flow velocity simulation analysis on a water supply pipe network structure consisting of the cast iron water supply pipeline, obtaining actual water flow velocity data through field measurement, and carrying out comprehensive analysis by combining a simulation analysis result and the actual water flow velocity data to obtain the water flow velocity and the retention time in the water supply pipe network structure.
The further improvement lies in that: the water flow state in the seventh step is specifically as follows: controlling the water flow in the cast iron water supply pipeline to be in a low flow speed and low water pressure state from the water outlet end of the water plant.
The invention has the beneficial effects that: the problem that the risk of water quality deterioration caused by overlong retention time of water flow in the cast iron water supply pipeline due to overlarge pipe diameter selection can be solved by selecting the cast iron water supply pipeline with a proper caliber, water quality deterioration can be avoided from the source by preferentially monitoring the water quality in the cast iron water supply pipeline at the water inlet end, water quality management in the cast iron water supply pipeline can be reasonably realized by carrying out periodical biological assimilable organic carbon determination on the water quality in the segmented cast iron water supply pipeline, meanwhile, the stability and accuracy of determination data can be improved by the segmented determination, scientific data support is provided for reasonably maintaining the water quality, the condition change of water quality environment can be avoided by maintaining the constant pH value of the water quality in the cast iron water supply pipeline to cause bacteria and microorganism breeding, the quality of the water quality can be effectively improved, and a good water quality maintenance effect is achieved.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example one
A water quality maintenance method for a cast iron water supply pipeline comprises the following steps:
the method comprises the following steps: reasonably selecting a cast iron water supply pipeline with the most suitable caliber and corrosion resistance and bacteria resistance, performing corrosion resistance enhancement treatment on a valve body and accessories used by the cast iron water supply pipeline, thermally spraying polyethylene anticorrosive paint on the surfaces of the valve body and the accessories used by the cast iron water supply pipeline, and forming an anticorrosive coating on the surfaces of the valve body and the accessories used by the cast iron water supply pipeline, wherein the thickness of the anticorrosive coating is controlled to be 2.5 mm;
step two: controlling a cast iron water supply pipeline to form an annular water supply pipe network structure at the water outlet end of a water plant;
step three: preferentially monitoring the water quality of water from a water source area entering a water inlet end pipeline of a water plant, and monitoring whether the water quality entering the water inlet end pipeline of the water plant has water eutrophication, persistent organic pollutants, endocrine interferon, giardia lamblia and cryptosporidium and carcinogenic, mutagenic and distortional substances;
step four: monitoring the pH value of water entering the water supply pipe network structure from the water outlet end of the water plant, and controlling the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant to be 7.3;
step five: the water supply pipe network structure composed of cast iron water supply pipelines is segmented, and the segmentation principle follows: all tail end nodes of the water supply pipe network structure are segmented monitoring points, all branch nodes of the water supply pipe network structure are segmented monitoring points, and the rest water supply pipe network structure segments are arranged according to the distance to form equidistant segmented monitoring points, and the water quality in the segmented cast iron water supply pipe is subjected to periodic biological assimilable organic carbon measurement;
step six: carrying out water flow velocity simulation analysis on a water supply pipe network structure consisting of cast iron water supply pipelines, obtaining actual water flow velocity data through field measurement, and carrying out comprehensive analysis by combining simulation analysis results and actual water flow velocity data to obtain water flow velocity and retention time in the water supply pipe network structure;
step seven: according to the interior rivers velocity of flow of water pipe network structure and dwell time, from the rivers state in the outlet end control cast iron water supply pipe of water works, it is in low velocity of flow and low water pressure state to keep rivers, can avoid because the too high energy consumption that causes of water pressure is too big, cast iron water supply pipe internal surface has the one deck water layer that hardly flows, can destroy the thickness of water layer when the velocity of flow increases, lead to oxygen in the rivers to see through the water layer easily and supply to cast iron water supply pipe inner wall, cause the oxidation corrosion.
Example two
The method comprises the following steps: reasonably selecting a cast iron water supply pipeline with the most suitable caliber and corrosion resistance and bacteria resistance, performing corrosion resistance enhancement treatment on a valve body and accessories used by the cast iron water supply pipeline, thermally spraying polyethylene anticorrosive paint on the surfaces of the valve body and the accessories used by the cast iron water supply pipeline, and forming an anticorrosive layer on the surfaces of the valve body and the accessories used by the cast iron water supply pipeline, wherein the thickness of the anticorrosive layer is controlled to be 2.5 mm;
step two: controlling a cast iron water supply pipeline to form an annular water supply pipe network structure at the water outlet end of a water plant;
step three: preferentially monitoring the water quality of water from a water source area entering a water inlet end pipeline of a water plant, and monitoring whether the water quality entering the water inlet end pipeline of the water plant has water eutrophication, persistent organic pollutants, endocrine interferon, giardia lamblia and cryptosporidium and carcinogenic, mutagenic and distortional substances;
step four: monitoring the pH value of water entering the water supply pipe network structure from the water outlet end of the water plant, and controlling the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant to be 7.5;
step five: the water supply pipe network structure composed of cast iron water supply pipelines is segmented, and the segmentation principle follows: all tail end nodes of the water supply pipe network structure are segmented monitoring points, all branch nodes of the water supply pipe network structure are segmented monitoring points, and the rest water supply pipe network structure segments are arranged according to the distance to form equidistant segmented monitoring points, and the water quality in the segmented cast iron water supply pipe is subjected to periodic biological assimilable organic carbon measurement;
step six: carrying out water flow velocity simulation analysis on a water supply pipe network structure consisting of cast iron water supply pipelines, obtaining actual water flow velocity data through field measurement, and carrying out comprehensive analysis by combining simulation analysis results and the actual water flow velocity data to obtain the water flow velocity and the retention time in the water supply pipe network structure;
step seven: according to the interior rivers velocity of flow of water pipe network structure and dwell time, from the rivers state in the outlet end control cast iron water supply pipe of water works, it is in low velocity of flow and low water pressure state to keep rivers, can avoid because the too high energy consumption that causes of water pressure is too big, cast iron water supply pipe internal surface has the one deck water layer that hardly flows, can destroy the thickness of water layer when the velocity of flow increases, lead to oxygen in the rivers to see through the water layer easily and supply to cast iron water supply pipe inner wall, cause the oxidation corrosion.
EXAMPLE III
The method comprises the following steps: reasonably selecting a cast iron water supply pipeline with the most suitable caliber and corrosion resistance and bacteria resistance, performing corrosion resistance enhancement treatment on a valve body and accessories used by the cast iron water supply pipeline, thermally spraying polyethylene anticorrosive paint on the surfaces of the valve body and the accessories used by the cast iron water supply pipeline, and forming an anticorrosive layer on the surfaces of the valve body and the accessories used by the cast iron water supply pipeline, wherein the thickness of the anticorrosive layer is controlled to be 2.5 mm;
step two: controlling a cast iron water supply pipeline to form an annular water supply pipe network structure at the water outlet end of a water plant;
step three: preferentially monitoring the water quality of water from a water source area entering a water inlet end pipeline of a water plant, and monitoring whether the water quality entering the water inlet end pipeline of the water plant has water eutrophication, persistent organic pollutants, endocrine interferon, giardia lamblia and cryptosporidium and carcinogenic, mutagenic and distortional substances;
step four: monitoring the pH value of water entering the water supply pipe network structure from the water outlet end of the water plant, and controlling the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant to be 7.8;
step five: the water supply pipe network structure composed of cast iron water supply pipelines is segmented, and the segmentation principle follows: all tail end nodes of the water supply pipe network structure are segmented monitoring points, all branch nodes of the water supply pipe network structure are segmented monitoring points, and the rest water supply pipe network structure segments are arranged according to the distance to form equidistant segmented monitoring points, and the water quality in the segmented cast iron water supply pipe is subjected to periodic biological assimilable organic carbon measurement;
step six: carrying out water flow velocity simulation analysis on a water supply pipe network structure consisting of cast iron water supply pipelines, obtaining actual water flow velocity data through field measurement, and carrying out comprehensive analysis by combining simulation analysis results and actual water flow velocity data to obtain water flow velocity and retention time in the water supply pipe network structure;
step seven: according to the interior rivers velocity of flow of water pipe network structure and dwell time, from the rivers state in the outlet end control cast iron water supply pipe of water works, it is in low velocity of flow and low water pressure state to keep rivers, can avoid because the too high energy consumption that causes of water pressure is too big, cast iron water supply pipe internal surface has the one deck water layer that hardly flows, can destroy the thickness of water layer when the velocity of flow increases, lead to oxygen in the rivers to see through the water layer easily and supply to cast iron water supply pipe inner wall, cause the oxidation corrosion.
According to the first embodiment, the second embodiment and the third embodiment, the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant is controlled to be 7.3-7.8, so that the quality of the water quality can be well maintained, and the risk of water quality deterioration can be reduced.
The problem that the risk of water quality deterioration caused by overlong retention time of water flow in the cast iron water supply pipeline due to overlarge pipe diameter selection can be solved by selecting the cast iron water supply pipeline with a proper caliber, water quality deterioration can be avoided from the source by preferentially monitoring the water quality in the cast iron water supply pipeline at the water inlet end, water quality management in the cast iron water supply pipeline can be reasonably realized by carrying out periodical biological assimilable organic carbon determination on the water quality in the segmented cast iron water supply pipeline, meanwhile, the stability and accuracy of determination data can be improved by the segmented determination, scientific data support is provided for reasonably maintaining the water quality, the condition change of water quality environment can be avoided by maintaining the constant pH value of the water quality in the cast iron water supply pipeline to cause bacteria and microorganism breeding, the quality of the water quality can be effectively improved, and a good water quality maintenance effect is achieved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A water quality maintenance method of a cast iron water supply pipeline is characterized by comprising the following steps:
the method comprises the following steps: reasonably selecting a cast iron water supply pipeline with a proper caliber and corrosion resistance and bacteria resistance, and carrying out corrosion resistance enhancement treatment on a valve body and accessories used by the cast iron water supply pipeline;
step two: controlling a cast iron water supply pipeline to form an annular water supply pipe network structure at the water outlet end of a water plant;
step three: preferentially monitoring the water quality of water from a water source area entering a water inlet end pipeline of a water plant, and monitoring whether the water quality entering the water inlet end pipeline of the water plant has water eutrophication and contains persistent organic pollutants;
step four: monitoring the pH value of water entering the water supply pipe network structure from the water outlet end of the water plant, and controlling the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant to be 7.0-8.5;
step five: segmenting a water supply pipe network structure consisting of cast iron water supply pipelines, and periodically measuring the bioassimilable organic carbon in the water quality of the cast iron water supply pipelines;
when in segmentation, the principle is followed, all tail end nodes of the water supply pipe network structure are segmented monitoring points, all branch nodes of the water supply pipe network structure are segmented monitoring points, and the rest water supply pipe network structure segments are arranged according to the distance to form equidistant segmented monitoring points;
step six: carrying out water flow velocity simulation analysis and field measurement on water flow in a water supply pipe network structure to obtain water flow velocity and residence time in the water supply pipe network structure, wherein the water flow velocity simulation analysis is carried out on the water supply pipe network structure consisting of cast iron water supply pipelines, actual water flow velocity data is obtained through field measurement, and the water flow velocity and residence time in the water supply pipe network structure are obtained by carrying out comprehensive analysis by combining simulation analysis results and the actual water flow velocity data;
step seven: according to the flow velocity and the retention time of water flow in the water supply pipe network structure, the water flow state in the cast iron water supply pipeline is controlled from the water outlet end of the water plant, specifically, the water flow in the cast iron water supply pipeline is controlled to be in a low flow velocity and low water pressure state from the water outlet end of the water plant.
2. The water quality maintenance method of the cast iron water supply pipeline according to claim 1, characterized in that: the corrosion prevention enhancing treatment in the step one is specifically as follows: the surface of the valve body and the surface of the fittings for the cast iron water supply pipeline are thermally sprayed with polyethylene anticorrosive paint, and an anticorrosive layer is formed on the surface of the valve body and the surfaces of the fittings for the cast iron water supply pipeline.
3. The water quality maintenance method of the cast iron water supply pipeline according to claim 2, characterized in that: the thickness of the anticorrosive layer in the first step is controlled to be 2-3 mm.
4. The water quality maintenance method of the cast iron water supply pipeline according to claim 1, characterized in that: the water quality monitoring content in the third step further comprises: and monitoring the water quality for the presence or absence of endocrine interferon, the presence or absence of giardia and cryptosporidium, and the presence or absence of carcinogenic, mutagenic and distortional substances.
5. The water quality maintenance method of the cast iron water supply pipeline according to claim 1, characterized in that: and in the fourth step, the pH value of the water entering the water supply pipe network structure from the water outlet end of the water plant is controlled to be 7.3-7.8.
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