CN112624322A - Optimization method of sludge pipeline conveying system of sewage plant - Google Patents
Optimization method of sludge pipeline conveying system of sewage plant Download PDFInfo
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- CN112624322A CN112624322A CN202011516657.5A CN202011516657A CN112624322A CN 112624322 A CN112624322 A CN 112624322A CN 202011516657 A CN202011516657 A CN 202011516657A CN 112624322 A CN112624322 A CN 112624322A
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- 239000010802 sludge Substances 0.000 title claims abstract description 254
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000005457 optimization Methods 0.000 title claims abstract description 20
- 239000010865 sewage Substances 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 75
- 238000005259 measurement Methods 0.000 claims abstract description 29
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 12
- 229910052753 mercury Inorganic materials 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 238000010835 comparative analysis Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses an optimization method of a sludge pipeline conveying system of a sewage plant, which comprises the following steps: preparing a test device, measuring parameters at the same flow rate, analyzing results at the same flow rate, measuring parameters at the same mass fraction, analyzing results at the same mass fraction and designing an optimization scheme; according to the invention, the differential pressure measurement, the flow measurement and the mass fraction measurement are carried out on the sludge at the same flow velocity by the test device, so that the influence of the sludge with different mass fractions on the on-way resistance in the sludge pipeline conveying process is obtained through analysis, the differential pressure measurement, the flow measurement and the mass fraction measurement are carried out on the sludge at the same mass fraction by the test device, so that the influence of the sludge with different flow velocities on the on-way resistance in the sludge pipeline conveying process is obtained through analysis, the optimal sludge mass fraction and flow velocity in the sludge pipeline conveying system are selected according to the analysis result, and the optimal optimization scheme is designed, so that the sludge pipeline conveying system is more efficient and energy-saving in operation, and the management level of the sludge pipeline conveying is improved.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to an optimization method of a sludge pipeline conveying system of a sewage plant.
Background
The activated sludge method becomes the first choice for urban sewage treatment because of its high efficiency, low consumption advantage, but the massive sludge produced from this has increased the enormous burden for sewage treatment plant, because the sludge has enriched a large amount of pollutants such as heavy metal, organic composition and inorganic impurity, if not disposed properly, will cause serious pollution to soil, water and atmosphere, therefore, the sewage treatment plant sludge must be transported to the sludge plant and treated intensively, at present, the transport mode of the sludge mainly includes truck transport, barge transport and pipeline transport, etc., and the pipeline transport of the sludge has advantages such as high transport efficiency, sanitation and can automaticity control the process degree height, etc., apply more extensively in the engineering field, have successful application examples such as the netherlands, usa, japan, etc.;
because the sludge contains a large amount of sedimentary solid matters and the flowing state of the sedimentary solid matters in the pipeline is very complex, the design and the control of the sludge conveying pipeline are mainly based on manual experience at present, scientific basis is lacked, and the sludge conveying pipeline system cannot be effectively optimized, so that the waste of construction cost and operation cost is caused to a great extent.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an optimization method of a sludge pipeline conveying system of a sewage plant, which comprises the steps of firstly carrying out differential pressure measurement, flow measurement and mass fraction measurement on sludge at the same flow rate through a test device so as to analyze the influence of sludge with different mass fractions on the on-way resistance in the sludge pipeline conveying process, and then carrying out differential pressure measurement, flow measurement and mass fraction measurement on the sludge at the same mass fraction through the test device so as to analyze the influence of the sludge with different flow rates on the on-way resistance in the sludge pipeline conveying process.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme: an optimization method of a sludge pipeline conveying system of a sewage plant comprises the following steps:
the method comprises the following steps: preparation test device
Preparing a test device according to test requirements, wherein the test device comprises a sludge container and a sludge pump, the sludge container comprises a first sludge box, a second sludge box and a third sludge box, the mass fractions of the sludge in the first sludge box, the second sludge box and the third sludge box are different, the output end of the sludge pump is connected with a test pipe, the test pipe is provided with a control valve, the test pipe is connected with a mercury differential pressure gauge, one end of the test pipe, far away from the sludge pump, extends into the sludge container through a return pipe, and the return pipe is provided with a vortex flowmeter;
step two: measurement of parameters at the same flow rate
Firstly, starting a sludge pump and pumping sludge in a first sludge tank into a test pipe, then measuring the sludge pressure difference in the test pipe, measuring the sludge flow when the sludge flows into a return pipe from the test pipe, then measuring the mass fraction of the sludge, then replacing a second sludge tank, repeating the steps, measuring the parameters again, finally replacing a third sludge tank, repeating the steps, measuring the parameters again, and recording the parameters after the measurement is finished;
step three: analysis of results at the same flow rate
Calculating the on-way resistance of the sludge with different mass fractions in the conveying process through the parameters measured by the sludge with different mass fractions at the same flow rate in the step two, and obtaining the influence of the sludge with different mass fractions on the on-way resistance in the conveying process of the sludge pipeline through comparative analysis;
step four: determination of parameters at the same mass fraction
Firstly, a sludge pump is started, the flow velocity of sludge in a test pipe is adjusted through a control valve, so that the sludge in a first sludge tank is pumped into the test pipe at a low speed, then the differential pressure of the sludge in the test pipe is measured, the flow of the sludge is measured when the sludge flows into a return pipe from the test pipe, then the mass fraction of the sludge is measured, then the sludge in the first sludge tank is pumped into the test pipe at a medium speed through the adjustment of the control valve, the parameters are continuously measured, finally the sludge in the first sludge tank is pumped into the test pipe at a high speed through the adjustment of the control valve, the parameters are continuously measured, and the parameters are recorded after the measurement is finished;
step five: analysis of results under isobaric scores
Calculating the on-way resistance of the sludge with different flow rates in the conveying process through the parameters measured by the sludge with different flow rates under the same mass fraction in the fourth step, and obtaining the influence of the sludge with different flow rates on the on-way resistance in the conveying process of the sludge pipeline through comparative analysis;
step six: design of optimization scheme
Selecting and adjusting the mass fraction of the sludge in the sludge pipeline conveying system to be optimal according to the result of the third separation in the step, and selecting and adjusting the flow rate of the sludge in the sludge pipeline conveying system to be optimal according to the result of the fifth separation in the step, thereby designing an optimal optimization scheme of the sludge pipeline conveying system.
The further improvement lies in that: in the first step, the model of the sludge pump is QW40-15, the sludge pump sucks sludge from the bottom and the periphery to ensure that the sludge in the sludge container is uniformly mixed, the sludge container is made of PVC materials, and the effective volume is 1000L.
The further improvement lies in that: in the first step, the test tube is made of stainless steel tube material, the inner diameter is 35mm, the mercury differential pressure gauge is connected with a pressure test point on the test tube through a silicone tube, and the vortex flowmeter measures the flow of sludge in the return tube.
The further improvement lies in that: in the first step, the maximum particle size of the sludge is 1000 microns, and the minimum particle size of the sludge is 5 microns.
The further improvement lies in that: and in the second step and the fourth step, the sludge differential pressure is measured by a mercury differential pressure gauge, the differential pressure value is read after the degree of the mercury differential pressure gauge is stable, and the flow value is read after the degree of the vortex shedding flowmeter is stable.
The further improvement lies in that: and in the second step and the fourth step, during the mass fraction measurement, firstly, taking sludge slurry to be measured for mass measurement, then placing the sludge slurry to be measured on a water bath steamer for evaporation, drying the sludge slurry at 105 ℃ for 2 hours, then drying the sludge slurry for 1 hour, weighing the sludge mass fraction, and finally calculating the sludge mass fraction according to the two mass values.
The further improvement lies in that: and in the test process, the temperature of the sludge is read by a thermometer, the fluctuation range of the temperature of the sludge is controlled to be +/-0.5 ℃, and the test is continued after the temperature is cooled to the specified temperature by a pump when the temperature is higher than a threshold value.
The invention has the beneficial effects that: the invention firstly carries out differential pressure measurement, flow measurement and mass fraction measurement on the sludge at the same flow rate through the test device, thereby analyzing the influence of the sludge with different mass fractions on the on-way resistance in the sludge pipeline conveying process, and then carries out differential pressure measurement, flow measurement and mass fraction measurement on the sludge with the same mass fraction through the test device, thereby analyzing the influence of the sludge with different flow rates on the on-way resistance in the sludge pipeline conveying process, further selects the optimal sludge mass fraction and flow rate in the sludge pipeline conveying system according to the analysis result, and designs the optimal optimization scheme, so that the operation of the sludge pipeline conveying system is more efficient and energy-saving, thereby being beneficial to improving the management level of sludge pipeline conveying, having important significance on saving the total conveying cost and being worthy of wide popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of the method 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the embodiment provides an optimization method of a sludge pipeline conveying system of a sewage plant, which includes the following steps:
the method comprises the following steps: preparation test device
Preparing a test device according to test requirements, wherein the test device comprises a sludge container and a sludge pump, the sludge container comprises a first sludge box, a second sludge box and a third sludge box, the mass fractions of sludge in the first sludge box, the second sludge box and the third sludge box are different, the output end of the sludge pump is connected with a test pipe, the test pipe is provided with a control valve, the test pipe is connected with a mercury differential pressure gauge, one end of the test pipe, far away from the sludge pump, extends into the sludge container through a return pipe, the return pipe is provided with a vortex flowmeter, the sludge pump is of a QW40-15 type, the sludge pump sucks sludge through the bottom and the periphery to ensure that the sludge in the sludge container is uniformly mixed, the sludge container is made of PVC material, the effective volume is 1000L, the test pipe is made of stainless steel pipe, the inner diameter is 35mm, the mercury differential pressure gauge is connected with a pressure test point on the test pipe through a silicone pipe, the vortex shedding flowmeter measures the flow of sludge in the return pipe, the particle size of the largest particle in the sludge is 1000 microns, and the particle size of the smallest particle in the sludge is 5 microns;
step two: measurement of parameters at the same flow rate
Firstly starting a sludge pump and pumping sludge in a first sludge tank into a test pipe, then measuring the sludge pressure difference in the test pipe, measuring the sludge flow when the sludge flows into a return pipe from the test pipe, then measuring the mass fraction of the sludge, then replacing a second sludge tank and repeating the steps to measure parameters again, finally replacing a third sludge tank and repeating the steps to measure parameters again, recording the parameters after the measurement is finished, measuring the sludge pressure difference through a mercury pressure difference meter, reading a pressure difference value after the mercury pressure difference meter degree is stable, reading a flow value after the vortex flowmeter degree is stable, firstly taking sludge slurry to be measured to measure the mass when the mass fraction is measured, then placing the sludge slurry to be measured on a water bath steamer to be dried for 2 hours at 105 ℃, then drying for 1 hour and weighing the mass, finally, calculating the mass fraction of the sludge according to the two mass values, reading the temperature of the sludge by a thermometer in the test process, controlling the fluctuation range of the temperature of the sludge to be +/-0.5 ℃, and continuing the test after the temperature is cooled to the specified temperature by a pump when the temperature is higher than a threshold value;
step three: analysis of results at the same flow rate
Calculating the on-way resistance of the sludge with different mass fractions in the conveying process through the parameters measured by the sludge with different mass fractions at the same flow rate in the step two, and obtaining the influence of the sludge with different mass fractions on the on-way resistance in the conveying process of the sludge pipeline through comparative analysis;
step four: determination of parameters at the same mass fraction
Firstly, a sludge pump is started, the flow velocity of sludge in a test pipe is adjusted through a control valve, so that the sludge in a first sludge tank is pumped into the test pipe at a low speed, then the differential pressure of the sludge in the test pipe is measured, the flow of the sludge is measured when the sludge flows into a return pipe from the test pipe, then the mass fraction of the sludge is measured, then the sludge in the first sludge tank is pumped into the test pipe at a medium speed through the adjustment of the control valve, the parameters are continuously measured, finally the sludge in the first sludge tank is pumped into the test pipe at a high speed through the adjustment of the control valve, the parameters are continuously measured, and the parameters are recorded after the measurement is finished;
step five: analysis of results under isobaric scores
Calculating the on-way resistance of the sludge with different flow rates in the conveying process through the parameters measured by the sludge with different flow rates under the same mass fraction in the fourth step, and obtaining the influence of the sludge with different flow rates on the on-way resistance in the conveying process of the sludge pipeline through comparative analysis;
step six: design of optimization scheme
Selecting and adjusting the mass fraction of the sludge in the sludge pipeline conveying system to be optimal according to the result of the third separation in the step, and selecting and adjusting the flow rate of the sludge in the sludge pipeline conveying system to be optimal according to the result of the fifth separation in the step, thereby designing an optimal optimization scheme of the sludge pipeline conveying system.
The optimization method of the sludge pipeline conveying system of the sewage plant comprises the steps of firstly carrying out differential pressure measurement, flow measurement and mass fraction measurement on sludge at the same flow rate through a test device, analyzing the influence of sludge with different mass fractions on-way resistance in the sludge pipeline conveying process, then carrying out differential pressure measurement, flow measurement and mass fraction measurement on the sludge at the same mass fraction through the test device, analyzing the influence of the sludge with different flow rates on-way resistance in the sludge pipeline conveying process, further selecting the optimal sludge mass fraction and flow rate in the sludge pipeline conveying system according to the analysis result, and designing an optimal optimization scheme, so that the sludge pipeline conveying system is efficient and energy-saving in operation, the management level of sludge pipeline conveying is improved, meanwhile, the optimization method has important significance for saving the total conveying cost, and is worthy of wide popularization.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. An optimization method of a sludge pipeline conveying system of a sewage plant is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: preparation test device
Preparing a test device according to test requirements, wherein the test device comprises a sludge container and a sludge pump, the sludge container comprises a first sludge box, a second sludge box and a third sludge box, the mass fractions of the sludge in the first sludge box, the second sludge box and the third sludge box are different, the output end of the sludge pump is connected with a test pipe, the test pipe is provided with a control valve, the test pipe is connected with a mercury differential pressure gauge, one end of the test pipe, far away from the sludge pump, extends into the sludge container through a return pipe, and the return pipe is provided with a vortex flowmeter;
step two: measurement of parameters at the same flow rate
Firstly, starting a sludge pump and pumping sludge in a first sludge tank into a test pipe, then measuring the sludge pressure difference in the test pipe, measuring the sludge flow when the sludge flows into a return pipe from the test pipe, then measuring the mass fraction of the sludge, then replacing a second sludge tank, repeating the steps, measuring the parameters again, finally replacing a third sludge tank, repeating the steps, measuring the parameters again, and recording the parameters after the measurement is finished;
step three: analysis of results at the same flow rate
Calculating the on-way resistance of the sludge with different mass fractions in the conveying process through the parameters measured by the sludge with different mass fractions at the same flow rate in the step two, and obtaining the influence of the sludge with different mass fractions on the on-way resistance in the conveying process of the sludge pipeline through comparative analysis;
step four: determination of parameters at the same mass fraction
Firstly, a sludge pump is started, the flow velocity of sludge in a test pipe is adjusted through a control valve, so that the sludge in a first sludge tank is pumped into the test pipe at a low speed, then the differential pressure of the sludge in the test pipe is measured, the flow of the sludge is measured when the sludge flows into a return pipe from the test pipe, then the mass fraction of the sludge is measured, then the sludge in the first sludge tank is pumped into the test pipe at a medium speed through the adjustment of the control valve, the parameters are continuously measured, finally the sludge in the first sludge tank is pumped into the test pipe at a high speed through the adjustment of the control valve, the parameters are continuously measured, and the parameters are recorded after the measurement is finished;
step five: analysis of results under isobaric scores
Calculating the on-way resistance of the sludge with different flow rates in the conveying process through the parameters measured by the sludge with different flow rates under the same mass fraction in the fourth step, and obtaining the influence of the sludge with different flow rates on the on-way resistance in the conveying process of the sludge pipeline through comparative analysis;
step six: design of optimization scheme
Selecting and adjusting the mass fraction of the sludge in the sludge pipeline conveying system to be optimal according to the result of the third separation in the step, and selecting and adjusting the flow rate of the sludge in the sludge pipeline conveying system to be optimal according to the result of the fifth separation in the step, thereby designing an optimal optimization scheme of the sludge pipeline conveying system.
2. The method of claim 1, for optimizing a sewage plant sludge pipe transport system, comprising: in the first step, the model of the sludge pump is QW40-15, the sludge pump sucks sludge from the bottom and the periphery to ensure that the sludge in the sludge container is uniformly mixed, the sludge container is made of PVC materials, and the effective volume is 1000L.
3. The method of claim 1, for optimizing a sewage plant sludge pipe transport system, comprising: in the first step, the test tube is made of stainless steel tube material, the inner diameter is 35mm, the mercury differential pressure gauge is connected with a pressure test point on the test tube through a silicone tube, and the vortex flowmeter measures the flow of sludge in the return tube.
4. The method of claim 1, for optimizing a sewage plant sludge pipe transport system, comprising: in the first step, the maximum particle size of the sludge is 1000 microns, and the minimum particle size of the sludge is 5 microns.
5. The method of claim 1, for optimizing a sewage plant sludge pipe transport system, comprising: and in the second step and the fourth step, the sludge differential pressure is measured by a mercury differential pressure gauge, the differential pressure value is read after the degree of the mercury differential pressure gauge is stable, and the flow value is read after the degree of the vortex shedding flowmeter is stable.
6. The method of claim 1, for optimizing a sewage plant sludge pipe transport system, comprising: and in the second step and the fourth step, during the mass fraction measurement, firstly, taking sludge slurry to be measured for mass measurement, then placing the sludge slurry to be measured on a water bath steamer for evaporation, drying the sludge slurry at 105 ℃ for 2 hours, then drying the sludge slurry for 1 hour, weighing the sludge mass fraction, and finally calculating the sludge mass fraction according to the two mass values.
7. The method of claim 1, for optimizing a sewage plant sludge pipe transport system, comprising: and in the test process, the temperature of the sludge is read by a thermometer, the fluctuation range of the temperature of the sludge is controlled to be +/-0.5 ℃, and the test is continued after the temperature is cooled to the specified temperature by a pump when the temperature is higher than a threshold value.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100356A (en) * | 1985-04-01 | 1986-08-13 | 冶金工业部长沙黑色冶金矿山设计研究院 | The analogy method of slurry conduit transport design parameters and device thereof |
| JP2007508139A (en) * | 2003-10-15 | 2007-04-05 | ノルディック ウォーター プロダクツ エービー | Apparatus and method for sludge treatment |
| CN110579346A (en) * | 2019-08-28 | 2019-12-17 | 云南大红山管道有限公司 | Pipeline test device and method for urban dewatered sludge conveying |
-
2020
- 2020-12-21 CN CN202011516657.5A patent/CN112624322A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100356A (en) * | 1985-04-01 | 1986-08-13 | 冶金工业部长沙黑色冶金矿山设计研究院 | The analogy method of slurry conduit transport design parameters and device thereof |
| JP2007508139A (en) * | 2003-10-15 | 2007-04-05 | ノルディック ウォーター プロダクツ エービー | Apparatus and method for sludge treatment |
| CN110579346A (en) * | 2019-08-28 | 2019-12-17 | 云南大红山管道有限公司 | Pipeline test device and method for urban dewatered sludge conveying |
Non-Patent Citations (1)
| Title |
|---|
| 纪宁: "污泥管道输送特性的研究", 《中国优秀博硕士学位论文全文数据库（硕士）》 * |
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Application publication date: 20210409 |