CN112794589A - Efficient coal slime dissolved gas dehydration process - Google Patents
Efficient coal slime dissolved gas dehydration process Download PDFInfo
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- CN112794589A CN112794589A CN202011610586.5A CN202011610586A CN112794589A CN 112794589 A CN112794589 A CN 112794589A CN 202011610586 A CN202011610586 A CN 202011610586A CN 112794589 A CN112794589 A CN 112794589A
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- 239000003245 coal Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 45
- 230000018044 dehydration Effects 0.000 title claims abstract description 42
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 17
- 230000033558 biomineral tissue development Effects 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 239000003250 coal slurry Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Classifications
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention relates to a high-efficiency coal slime dissolved air dehydration process, which comprises the following steps: sequentially carrying out classification separation, concentration precipitation and filter pressing dehydration on the slime water to finally form the slime; adding a gas dissolving process before filter pressing dehydration, wherein the gas dissolving process comprises the following steps: the pressurized gas is mixed into the coal slime water through the gas device and then enters the mixing pump, the impeller rotates at a high speed, the gas and the coal slime water are scattered, formed micro bubbles are fully collided and jointed with coal particles, the coal slime water is subjected to bubble mineralization treatment, gas-dissolved coal slime water of a solid-liquid-gas three-phase mixing system is formed, and after the bubble mineralization treatment is carried out on the coal slime water, filter pressing is carried out again, so that the filter pressing dehydration efficiency can be greatly improved.
Description
Technical Field
The invention relates to a coal slime dehydration process, in particular to a high-efficiency coal slime gas-dissolving dehydration process.
Background
The coal slime is from coal slime water (the granularity diameter of the coal slime is generally 0-0.25mm), and tailings are remained after the coal slime is treated by a grading and sorting process. The coal slime with low water concentration (solid content 8-10%) is finally formed through the process links of grading separation, concentration and precipitation, filter pressing and dehydration and the like, but still has high water content (water content 20-24%), relatively fine granularity (-0.25mm), high viscosity, high water retention and low heat value. The main components are coal powder, clay mineral and argillization thereof. During the concentration process, flocculant (polyacrylamide) is added to promote the particles to polymerize to form a large-volume polymer group, so that the sedimentation of the coal slime is accelerated. The polymer clusters are floccules, have high water holding capacity and high viscosity, are difficult to disperse under the condition of no external interference and are difficult to discharge internal water.
The high water content of the coal slime seriously affects the quality and the utilization of the coal slime, and the reduction of the water content of the coal slime is very important for improving the quality of the coal slime.
In view of this, this patent is filed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a high-efficiency coal slime dissolved gas dehydration process, which can greatly improve the filter-pressing dehydration efficiency by carrying out filter pressing after carrying out bubble mineralization treatment on coal slime water.
The invention aims to provide a high-efficiency coal slime dissolved air dehydration process.
According to the specific embodiment of the invention, the high-efficiency coal slime dissolved air dehydration process comprises the following steps: sequentially carrying out classification separation, concentration precipitation and filter pressing dehydration on the slime water to finally form the slime; adding a gas dissolving process before filter pressing dehydration, wherein the gas dissolving process comprises the following steps: the pressurized gas is mixed into the coal slime water through a gas device, then enters a mixing pump, is rotated at a high speed through an impeller, and is scattered, formed micro bubbles are fully collided and jointed with coal particles, so that the coal slime water is subjected to bubble mineralization treatment, and the gas-dissolved coal slime water of a solid-liquid-gas three-phase mixed system is formed.
Further, the gas-liquid ratio of the pressurized gas mixed into the coal slime water is 10%, and the gas flow is 20-30% of the coal slime water feeding flow. The saturated solubility of gas (air) in water depends on the temperature and pressure of water, and the gas-liquid ratio is 10% in general (the pressure of dissolved gas water is 5bar, and the water temperature is 20 ℃). In order to improve the filter pressing efficiency, exert the characteristic of better gas than liquid fluidity and play a role of bubble mineralization in solid-liquid separation, the gas flow is required to be 20-25% of the feed flow.
The method is determined according to the feeding flow and the solubility, and in order to improve the gas dissolving sufficiency, the feeding amount of the gas flow is 20-30%; in order to increase the joint sufficiency of the bubbles and the hydrophobic particles, the rotating speed of the mixing pump is not lower than 1500rpm, and the high-speed shearing force of the impeller promotes the polymeric clusters in the coal slurry to break up and refine the bubbles, so that the opportunity of fully jointing the micro-bubbles and the hydrophobic particles is provided.
The diameter of bubbles generated by pressure relief gas is related to pressure, and the diameter of the bubbles is less than 30 micrometers when the minimum pressure is more than 4 bar; the caliber of the releaser is not more than 2.5mm, and the quantity of micro bubbles generated is the most.
Preferably, the filter-pressing dehydration process specifically comprises the following steps: the discharge of the mixing pump is butted with a coal slime filter press, and the pressure of a filter plate of the filter press is not lower than 1.5 MPa.
Further, the pressure of the gas-dissolving coal slime water is 5bar, and the water temperature is 20 ℃; preferably, the rotation speed of the mixing pump is not lower than 1500 rpm. The coal slurry water is enabled to have a certain amount of gas, and the gas uniformly exists in the coal slurry water in a micro-bubble form, and is jointed with coal particles while dispersing coal slurry aggregation.
Further, the gas device is a gas guide device, and the gas guide device comprises a compressed gas source, a gas transmission pipeline and a releaser which are sequentially connected; and a gas flowmeter and a controllable valve are arranged on the gas transmission pipeline. The gas flow meter is used for monitoring the dissolved gas amount.
The filter presses are all provided with high-pressure fans, the pressure is above 0.5Mp, and the pressure air source can be adopted through the air guide device. The diameter of the gas transmission pipeline is phi 15mm, and the gas transmission pipeline can be selected according to gas consumption.
Furthermore, the pressure of the compressed air source is more than 0.5 Mp.
Further, the air guide device is provided with a plurality of releasers, one end of the air conveying pipeline close to the releasers is communicated with a plurality of branch air passages, and the number of the branch air passages is the same as that of the releasers.
Furthermore, the controllable valve is an electromagnetic valve, and the electromagnetic valve is synchronous with the mixing pump, so that feeding and air inlet are simultaneously started and stopped. The controllable valve is provided with an electromagnetic valve to realize automatic control, and is synchronous with the mixing pump to realize simultaneous start and stop of feeding and air inlet.
Furthermore, the air guide device also comprises an air guide hose, one end of the air guide hose is communicated with one branch air path, and the other end of the air guide hose is communicated with the releaser; preferably, quick connectors are respectively arranged at two ends of the air guide hose. The hose is convenient to be disassembled, the releaser is convenient to repair for inspection, other materials can be used, the branch air path and the releaser are connected in an air mode, and the two ends of the hose are provided with quick connectors.
Further, the releaser is a tracheal needle for introducing high-pressure gas into a feeding pipeline of the mixing pump; preferably, the releaser is formed by fixedly connecting a hose extending into the feeding pipeline and an outer sleeve, and the inner diameter of the hose is smaller than that of the outer sleeve. The releaser is a tracheal needle (inner diameter is 2.5-5mm) which is responsible for leading high-pressure gas into a feeding pipeline of the pump, the tracheal needle is uniformly distributed around the pipeline, a part of the flexible hose with optional outer sleeve is inserted, the inner diameter of the hose is smaller than that of the tracheal needle, when pressure gas exists, the hose is opened to exhaust, and when no pressure gas exists, the outlet is shrunk to prevent external granular objects from entering the releaser to be blocked.
Furthermore, the releaser is arranged on a gas dissolving pipeline, the gas dissolving pipeline is a part of a feeding pipeline of the mixing pump, a plurality of pipe holes are formed in the gas dissolving pipeline, the pipe holes are uniformly distributed around the pipeline, and the releaser is arranged in the pipe holes. The pipe holes are uniformly distributed around the pipeline and used for installing the releasers, and the quantity of the releasers is determined according to the mixed gas quantity.
Solid-liquid separation: the form of water in the wet concentrate can be divided into crystal water, accumulated water, capillary water and gravity water. The bubbles play a role in enabling most of hydrophobic particles to be separated from water by absorbing the bubbles, the compressed bubbles are gathered to form capillary pores, the liquidity of the gas is far higher than that of the liquid, and a good water guide channel is provided for water drainage.
Crystal water is in mineral crystal lattices, and does not need to go out, and the water can be removed only during roasting;
gravity water: the water is also called free water, can transmit pressure, is easy to flow, fills all gaps of the ore particles, enables the ore particles to move under the action of the pressure, and most of water is extruded out.
The accumulated water is water accumulated in a polymer cluster or accumulated on the surface of minerals due to unsmooth surface of the minerals by virtue of adsorption force, usually the water amount is not large, but most of the accumulated water is separated after being mineralized by bubbles;
the surface film water exists due to the molecular attraction between the ore particles and water, the ore particles are surrounded by a thicker water film in the form of accumulated water, and the particles with the hydrophobic property are mineralized by bubbles and then are separated from the water;
capillary water is also called capillary water, the moving direction and speed are determined by the pressure of the capillary, and the capillary water exists under the action of capillary suction force, and the size of mineral particles influences that water partially or completely fills pores of the capillary water and moves under the action of capillary attraction force. Under the action of pressure, the bubbles are polymerized and flow to form new capillary pores, and the gas has better fluidity than water and replaces the position of capillary water.
Compared with the prior art, the invention has the beneficial effects that: according to the high-efficiency coal slime gas-dissolving dehydration process, the coal slime water is subjected to bubble mineralization treatment and then is subjected to filter pressing, so that the filter pressing dehydration efficiency can be improved to a large extent, the filter pressing effect of the coal slime water subjected to the gas-dissolving process is obviously improved, the filter pressing efficiency is improved by 30%, and the water content of a filter cake formed by filter pressing is reduced by 5-10%.
The coal slurry is mineralized properly and then filter-pressed, so that the dehydration effect is obviously improved, and the main component of the coal slurry prepared by the high-efficiency coal slurry gas-dissolving dehydration process is coal powder (the solid content is 60-70%).
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, 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 the drawings without creative efforts.
FIG. 1 shows a schematic view of the structure of an air guide according to embodiment 3 of the present invention;
FIG. 2 is a schematic view showing the construction of a releaser according to embodiment 3 of the present invention;
FIG. 3 is a schematic view showing the construction of an air guide hose according to embodiment 3 of the present invention;
fig. 4 shows a schematic diagram of a solution line according to embodiment 3 of the present invention.
Reference numerals
1-a compressed air source; 2-gas transmission pipeline; 3-releaser; 4-gas flow meter; 5-a controllable valve; 6, a branch gas circuit; 7, an air guide hose; 8, a quick connector; 9-gas dissolving pipeline; 31-a hose; 32-coat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1
The embodiment provides a high-efficiency coal slime gas-dissolving dehydration process, which is implemented according to the specific embodiment of the invention and comprises the following steps: sequentially carrying out classification separation, concentration precipitation and filter pressing dehydration on the slime water to finally form the slime; adding a gas dissolving process before filter pressing dehydration, wherein the gas dissolving process comprises the following steps: the pressurized gas is mixed into the coal slime water through a gas device, then enters a mixing pump, is rotated at a high speed through an impeller, and is scattered, formed micro bubbles are fully collided and jointed with coal particles, so that the coal slime water is subjected to bubble mineralization treatment, and the gas-dissolved coal slime water of a solid-liquid-gas three-phase mixed system is formed.
Example 2
The embodiment provides a high-efficiency coal slime gas-dissolving dehydration process, which is implemented according to the specific embodiment of the invention and comprises the following steps: sequentially carrying out classification separation, concentration precipitation and filter pressing dehydration on the slime water to finally form the slime; adding a gas dissolving process before filter pressing dehydration, wherein the gas dissolving process comprises the following steps: the pressurized gas is mixed into the coal slime water through a gas device, then enters a mixing pump, is rotated at a high speed through an impeller, and is scattered, formed micro bubbles are fully collided and jointed with coal particles, so that the coal slime water is subjected to bubble mineralization treatment, and the gas-dissolved coal slime water of a solid-liquid-gas three-phase mixed system is formed.
Further, the gas-liquid ratio of the pressurized gas mixed into the coal slime water is 10%, and the gas flow is 20-30% of the coal slime water feeding flow.
Preferably, the filter-pressing dehydration process specifically comprises the following steps: the discharge of the mixing pump is butted with a coal slime filter press, and the pressure of a filter plate of the filter press is not lower than 1.5 MPa.
Further, the pressure of the gas-dissolving coal slime water is 5bar, and the water temperature is 20 ℃; preferably, the rotation speed of the mixing pump is not lower than 1500 rpm.
Example 3
The embodiment provides a high-efficiency coal slime gas-dissolving dehydration process, which is implemented according to the specific embodiment of the invention and comprises the following steps: sequentially carrying out classification separation, concentration precipitation and filter pressing dehydration on the slime water to finally form the slime; adding a gas dissolving process before filter pressing dehydration, wherein the gas dissolving process comprises the following steps: the pressurized gas is mixed into the coal slime water through a gas device, then enters a mixing pump, is rotated at a high speed through an impeller, and is scattered, formed micro bubbles are fully collided and jointed with coal particles, so that the coal slime water is subjected to bubble mineralization treatment, and the gas-dissolved coal slime water of a solid-liquid-gas three-phase mixed system is formed.
Further, the gas-liquid ratio of the pressurized gas mixed into the coal slime water is 10%, and the gas flow is 20-30% of the coal slime water feeding flow.
Preferably, the filter-pressing dehydration process specifically comprises the following steps: the discharge of the mixing pump is butted with a coal slime filter press, and the pressure of a filter plate of the filter press is not lower than 1.5 MPa.
Further, the pressure of the gas-dissolving coal slime water is 5bar, and the water temperature is 20 ℃; preferably, the rotation speed of the mixing pump is not lower than 1500 rpm.
Further, the gas device is a gas guide device, and the gas guide device comprises a compressed gas source 1, a gas transmission pipeline 2 and a releaser 3 which are connected in sequence; and the gas transmission pipeline is provided with a gas flow meter 4 and a controllable valve 5.
Furthermore, the pressure of the compressed air source is more than 0.5 Mp.
Further, the air guide device is provided with a plurality of releasers, the air conveying pipeline is close to one end of each releaser and is communicated with a plurality of branch air passages 6, and the number of the branch air passages is the same as that of the releasers.
Furthermore, the controllable valve is an electromagnetic valve, and the electromagnetic valve is synchronous with the mixing pump, so that feeding and air inlet are simultaneously started and stopped.
Furthermore, the air guide device also comprises an air guide hose 7, one end of the air guide hose is communicated with one branch air path, and the other end of the air guide hose is communicated with the releaser; preferably, the two ends of the air guide hose are respectively provided with a quick connector 8.
Further, the releaser is a tracheal needle for introducing high-pressure gas into a feeding pipeline of the mixing pump;
preferably, the releaser is formed by fixedly connecting a hose 31 extending into the feeding pipeline and an outer sleeve 32, and the inner diameter of the hose is smaller than that of the outer sleeve.
Furthermore, the releaser is arranged on a gas dissolving pipeline 9, the gas dissolving pipeline is a part of a feeding pipeline of the mixing pump, a plurality of pipe holes are formed in the gas dissolving pipeline, the pipe holes are uniformly distributed around the pipeline, and the releaser is arranged in the pipe holes.
According to the high-efficiency coal slime gas-dissolving dehydration process, the coal slime water is subjected to bubble mineralization treatment and then is subjected to filter pressing, so that the filter pressing dehydration efficiency can be improved to a large extent, the filter pressing effect of the coal slime water subjected to the gas-dissolving process is obviously improved, the filter pressing efficiency is improved by 30%, and the water content of a filter cake formed by filter pressing is reduced by 5-10%.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The high-efficiency coal slime dissolved gas dehydration process is characterized by comprising the following steps of: sequentially carrying out classification separation, concentration precipitation and filter pressing dehydration on the slime water to finally form the slime; adding a gas dissolving process before filter pressing dehydration, wherein the gas dissolving process comprises the following steps: the pressurized gas is mixed into the coal slime water through a gas device, then enters a mixing pump, is rotated at a high speed through an impeller, and is scattered, formed micro bubbles are fully collided and jointed with coal particles, so that the coal slime water is subjected to bubble mineralization treatment, and the gas-dissolved coal slime water of a solid-liquid-gas three-phase mixed system is formed.
2. The high-efficiency coal slime gas-dissolving and dehydrating process of claim 1, wherein the gas-liquid ratio of the pressurized gas mixed into the coal slime water is 10%, and the gas flow is 20-30% of the coal slime water feeding flow; preferably, the filter-pressing dehydration process specifically comprises the following steps: the discharge of the mixing pump is butted with a coal slime filter press, and the pressure of a filter plate of the filter press is not lower than 1.5 MPa.
3. The high-efficiency coal slime gas-dissolving and dewatering process according to claim 1, wherein the pressure of the gas-dissolving coal slime water is 5bar, and the water temperature is 20 ℃; preferably, the rotation speed of the mixing pump is not lower than 1500 rpm.
4. The high-efficiency coal slime gas-dissolving and dewatering process according to claim 1, wherein the gas device is a gas guide device, and the gas guide device comprises a compressed gas source, a gas pipeline and a releaser which are connected in sequence; and a gas flowmeter and a controllable valve are arranged on the gas transmission pipeline.
5. The high-efficiency coal slime gas-dissolving and dewatering process according to claim 4, wherein the pressure of the compressed gas source is more than 0.5 Mp.
6. The high-efficiency coal slime dissolved air dehydration process of claim 4, characterized in that the air guide device is provided with a plurality of releasers, one ends of the air transmission pipelines, which are close to the releasers, are communicated with a plurality of branch air paths, and the number of the branch air paths is the same as that of the releasers.
7. The high-efficiency coal slime dissolved air dehydration process of claim 6, wherein the air guide device further comprises an air guide hose, one end of the air guide hose is communicated with one of the branch air paths, and the other end of the air guide hose is communicated with the releaser; preferably, quick connectors are respectively arranged at two ends of the air guide hose.
8. The high-efficiency coal slime dissolved air dehydration process according to claim 4, characterized in that the controllable valve is an electromagnetic valve, and the electromagnetic valve is synchronous with the mixing pump to simultaneously start and stop feeding and air intake.
9. The high-efficiency coal slime dissolved air dehydration process of claim 4, wherein the releaser is a gas pipe needle for introducing high-pressure gas into a feeding pipeline of the mixing pump; preferably, the releaser is formed by fixedly connecting a hose extending into the feeding pipeline and an outer sleeve, and the inner diameter of the hose is smaller than that of the outer sleeve.
10. The high-efficiency coal slime dissolved air dehydration process according to claim 4, wherein the releaser is arranged on a dissolved air pipeline, the dissolved air pipeline is a part of a feeding pipeline of the mixing pump, a plurality of pipe holes are formed in the dissolved air pipeline, the pipe holes are uniformly distributed around the pipeline, and the releaser is arranged in the pipe holes.
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| CN202011610586.5A CN112794589A (en) | 2020-12-30 | 2020-12-30 | Efficient coal slime dissolved gas dehydration process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164434A (en) * | 1996-05-02 | 1997-11-12 | 张日养 | Dissolved air rapid pressurized filtration dehydration method and device |
| CN104162479A (en) * | 2014-06-12 | 2014-11-26 | 煤炭工业济南设计研究院有限公司 | Movable sieve waste rock discharge system slime water treatment process and device |
| CN204138373U (en) * | 2014-08-15 | 2015-02-04 | 山东利源海达环境工程有限公司 | Dissolved air release |
| JP2018140334A (en) * | 2017-02-27 | 2018-09-13 | 株式会社石垣 | Sludge dewatering method |
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2020
- 2020-12-30 CN CN202011610586.5A patent/CN112794589A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164434A (en) * | 1996-05-02 | 1997-11-12 | 张日养 | Dissolved air rapid pressurized filtration dehydration method and device |
| CN104162479A (en) * | 2014-06-12 | 2014-11-26 | 煤炭工业济南设计研究院有限公司 | Movable sieve waste rock discharge system slime water treatment process and device |
| CN204138373U (en) * | 2014-08-15 | 2015-02-04 | 山东利源海达环境工程有限公司 | Dissolved air release |
| JP2018140334A (en) * | 2017-02-27 | 2018-09-13 | 株式会社石垣 | Sludge dewatering method |
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| 赵世永等: "《选煤工艺》", 30 November 2013, 中国矿业大学出版社 * |
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