CN109736770B - Backwashing filtering system and method for in-situ leaching uranium mining - Google Patents
Backwashing filtering system and method for in-situ leaching uranium mining Download PDFInfo
- Publication number
- CN109736770B CN109736770B CN201811604195.5A CN201811604195A CN109736770B CN 109736770 B CN109736770 B CN 109736770B CN 201811604195 A CN201811604195 A CN 201811604195A CN 109736770 B CN109736770 B CN 109736770B
- Authority
- CN
- China
- Prior art keywords
- filtering
- valve
- filter element
- liquid
- backflushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention relates to a backwashing filtering system and method for in-situ leaching uranium mining, wherein the system comprises a filtering device, a static mixer, a gas bag, a liquid pouring container, a pressure stabilizing valve, a check valve, a gas flowmeter, an electromagnetic flowmeter and a flow regulating valve; the method comprises the following steps: step one, carrying out solution analysis; step two, normal filtration; and step three, performing backwashing operation. The filter element filtering diameter is determined through leachate analysis, and the filtering precision is ensured to the greatest extent; the leaching priming solution is adopted for backwashing, so that uranium metal waste caused by the adoption of stock solution is avoided, the pressure of the priming solution in the system is effectively utilized, and a pump is not required to be added independently; by adopting an SV static mixer, the mixing effect is good, the back flushing is thorough, and the speed is high; the gas is fed through the main pipe of the mixer, and the gas-liquid mixing backflushing filter element is carried out at a large proportion gas-liquid ratio, so that the backflushing water quantity is greatly reduced. The system and the process have good filtering and back flushing effects in the ground leaching practice, and the system is easy to automate.
Description
Technical Field
The invention belongs to the field of in-situ leaching uranium mining, and particularly relates to a backwashing filtering system and method for in-situ leaching uranium mining.
Background
The in-situ leaching uranium mining method comprises the steps of continuously pumping and injecting liquid to pump leaching liquid out of the ground, and re-injecting a leaching agent into the ground after adsorption. Due to the hydrodynamic and chemical actions, the leachate contains a certain amount of solids. In order to ensure that the resin bed is not contaminated and the pores of the underground formation are not blocked, it is necessary to filter the leach solution before it enters the resin tower and before the leaching agent is injected into the underground formation.
In-situ leaching uranium mining currently adopts a bag filter for filtration. The bag filter has simple structure and low investment, and can ensure proper filtering precision. However, the bag filter has small dirt holding capacity, complicated operation for replacing the filter bag, long time and high labor intensity. Many factories and mines can only enlarge the filter holes of the filter bags under the condition that the filter bags cannot be timely replaced, and particles smaller than the diameter of the filter holes can enter a resin bed or a mineral bed to cause the blockage of the resin bed plate or the mineral bed, so that the pressure of the adsorption tower is increased or the liquid pumping and injecting amount is reduced.
The backwashing filter does not need to be disassembled, the labor intensity is reduced, the pollutant carrying capacity is large, and the using effect is good. The conventional backwashing filter adopts two filter screens of a coarse filter screen and a fine filter screen for filtering, and uses filtered pure water for backwashing the filter element. In order to ensure the cleaning effect, suction nozzles, electric brushes and other modes are often adopted to improve the cleaning effect. However, the solid particles of the in-situ leaching uranium leaching leachate mainly comprise flocculated iron, calcium-magnesium precipitates, clay and the like, the particle size of the solid impurities is generally less than 10 microns, the solid impurities are not easy to deposit on the ground surface, and the solid impurities are difficult to filter by a filter. For flocculated iron and clay, the filter element is difficult to backflush clean. Aiming at the difficult problem of water backwashing, the gas backwashing (CN200910186725.3), the gas-water alternate backwashing (CN201220703871.6) and the gas-liquid mixed backwashing (CN201120225035.7 and CNCN200620021906.2) are adopted as better solutions. CN200820025749.1 also proposes a gas-liquid back-cleaning distribution head. However, the above method is not very complicated and difficult to automate when filtering the leaching solution, and is not effective.
In addition, in-situ leaching uranium extraction mainly filters leachate or leaching agents, and if the leachate after filtration is adopted for back flushing, uranium metal in the leachate is wasted, the burden of an evaporation tank can be increased, and the risk of radioactive pollution is increased. Therefore, a backwashing filtering system and a process suitable for in-situ leaching uranium mining need to be designed, and the purposes of good filtering effect, easy backwashing of a filter element, water conservation, no waste of uranium metal, reduction of labor intensity and improvement of automation degree are achieved.
Disclosure of Invention
The invention aims to: aiming at the defects of the prior art, the system and the method for backwashing and filtering the in-situ leaching uranium mining are provided by combining the characteristics of the in-situ leaching uranium mining. The system combines the solid content characteristics of the leaching solution, adopts the lower injection liquid (leaching agent) of the in-situ leaching uranium mining as the backflushing liquid, utilizes the pressure of the lower injection liquid, and performs backflushing after being well mixed with a large amount of compressed air, thereby achieving the effects of good filtration, water saving and no uranium metal waste, and also being capable of well ensuring the backflushing effect of the filter element.
The technical scheme of the invention is as follows: a backwash filtering system for in-situ leaching uranium mining comprises a filtering device, a static mixer, a gas bag, a liquid pouring container, a pressure stabilizing valve, a check valve, a gas flowmeter, an electromagnetic flowmeter and a flow regulating valve;
the gas bag is connected with the static mixer through a pressure stabilizing valve A, a check valve A, a gas flowmeter and a flow regulating valve A and is used for providing compressed air;
the lower pouring container is connected with the static mixer through a pressure stabilizing valve B, a check valve B, an electromagnetic flowmeter and a flow regulating valve B and is used for providing a back flushing liquid;
the static mixer is used for fully mixing the compressed air and the lower pouring liquid and is connected with the filtering device through the back flushing pipe.
Furthermore, the filtering device adopts a mode of connecting two stages of filtering devices in series; the filter is formed by sequentially connecting a primary filtering liquid inlet pipe, a primary filtering device, a secondary filtering liquid inlet pipe, a secondary filtering device and a secondary filtering liquid outlet pipe;
furthermore, the primary filtering device is formed by connecting n sets of primary filtering systems in parallel; each set of primary filtering system is formed by sequentially connecting a primary filtering liquid inlet valve, a primary filter element and a primary filtering liquid outlet valve; the secondary filtering device is formed by connecting n sets of secondary filtering systems in parallel; each set of secondary filtering system is formed by sequentially connecting a secondary filtering liquid inlet valve, a secondary filter element and a secondary filtering liquid outlet valve.
Further, n is 2 or 3, and during operation, 1 set of first-stage filtering system and 1 set of second-stage filtering system are standby filtering systems.
Furthermore, the backflushing pipe is connected with the backflushing liquid inlet valve, the first-stage filter element or the second-stage filter element and the drain valve in sequence and then is connected with the drain pipe.
Furthermore, the first-stage filter element and the second-stage filter element adopt 316L stainless steel metal mesh folding filter elements.
Furthermore, the filter diameter of the first-stage filter element is 10-50 μm, and the filter diameter of the second-stage filter element is 5-10 μm.
Furthermore, the static mixer adopts an SV static mixer, and comprises a main pipe and a branch pipe, wherein the compressed air enters from the main pipe, and the injection liquid enters from the branch pipe.
The invention discloses a backwash filtering method for in-situ leaching uranium mining, which uses a filtering system provided by the invention and comprises the following steps:
step one, carrying out solution analysis;
analyzing the content and the particle size distribution of solid particles in underground water or leachate solution, analyzing main chemical components in the solution, particularly predicting the change of solids in the solution due to the change of hydrodynamic conditions, pH values and Eh values or components which may generate precipitates by reacting with strata, and further determining the filter diameters of a first-stage filter element and a second-stage filter element;
step two, normal filtration;
filtering the leachate or the bottom pouring liquid by a primary filtering liquid inlet pipe, a primary filtering device, a secondary filtering liquid inlet pipe and a secondary filtering device in sequence, and enabling the filtered filtrate to flow out of a secondary filtering liquid outlet pipe;
thirdly, performing backwashing operation;
when the pressure difference before and after filtration of the primary filter element is greater than 0.2MPa or the pressure difference before and after filtration of the secondary filter element is greater than 0.4MPa, starting a standby filter system, and then shutting down the filter system needing backwashing to prepare backwashing;
fourthly, controlling the pressure of the compressed air in the air bag to be 0.4-0.6Mpa through a pressure stabilizing valve A; controlling the pressure of the lower injection liquid in the lower injection liquid container to be 0.6-0.8MPa through a pressure stabilizing valve B; opening the flow regulating valve A and the flow regulating valve B in sequence to fully mix the compressed air and the lower injection liquid in the static mixer to obtain a backwashing medium;
and step five, opening a backflushing liquid inlet valve and a blowdown valve, and backflushing the first-stage filter element and the second-stage filter element which need to be backflushed until no iron or visible solid particles exist in the backflushing water, and ending the backflushing.
Furthermore, in the back flushing medium, the ratio of the compressed air to the injection liquid is 5:1-10:1 by volume.
The invention has the following remarkable effects: the filter element filtering diameter is determined through leachate analysis, and the filtering precision is ensured to the maximum extent; the leaching priming solution is adopted for backwashing, so that uranium metal waste caused by the adoption of stock solution is avoided, the pressure of the priming solution in the system is effectively utilized, and a pump is not required to be added independently; by adopting an SV static mixer, the mixing effect is good, the back flushing is thorough, and the speed is high; the gas is fed through the main pipe of the mixer, and the gas-liquid mixing backflushing filter element is carried out at a large proportion gas-liquid ratio, so that the backflushing water quantity is greatly reduced. The system and the process have good filtering and back flushing effects in the ground leaching practice, and the system is easy to automate.
Drawings
FIG. 1 is a schematic structural diagram of a backwash filter system for in-situ leaching uranium mining according to the present invention;
FIG. 2 is a schematic structural view of a static mixer;
in the figure, 1, a first-stage filtration liquid inlet pipe; 2. a second-stage filtering liquid inlet pipe; 3. a secondary filtration liquid outlet pipe; 4. back flushing the pipe; 5. a blow-off pipe; 6-1, a first-stage filter element; 6-2, a secondary filter element; 7. air bags; 8. a lower pouring liquid container; 9-1, a pressure stabilizing valve A; 9-2, a pressure stabilizing valve B; 10-1, a check valve A; 10-2, a check valve B; 11. a gas flow meter; 12. an electromagnetic flow meter; 13-1, a flow regulating valve A; 13-2, a flow regulating valve B; 14. a static mixer; 15-1, a primary filtering liquid inlet valve; 15-2, a first-stage filtering liquid valve; 15-3, a secondary filtering liquid inlet valve; 15-4, a secondary filtering liquid outlet valve; 15-5, backflushing a liquid inlet valve; 15-6, a blowdown valve; 16. a filtration device; 17. a main pipe; 18. and (4) branch pipes.
Detailed Description
The system and method for filtering uranium leaching by backwashing according to the present invention will be described in detail with reference to the following embodiments.
As shown in fig. 1 and 2, the backwashing filtering system for in-situ leaching uranium mining comprises a filtering device 16, a static mixer 14, a gas bag 7, a liquid pouring container 8, a pressure stabilizing valve, a check valve, a gas flowmeter 11, an electromagnetic flowmeter 12 and a flow regulating valve;
the air bag 7 is connected with the static mixer 14 through a pressure stabilizing valve A9-1, a check valve A10-1, a gas flowmeter 11 and a flow regulating valve A13-1 and is used for providing compressed air;
the lower injection container 8 is connected with the static mixer 14 through a pressure stabilizing valve B9-2, a check valve B10-2, an electromagnetic flowmeter 12 and a flow regulating valve B13-2 and is used for providing lower injection liquid;
the static mixer 14 is used for fully mixing the compressed air and the lower pouring liquid and is connected with a filtering device 16 through a back flushing pipe 4.
Further, the filtering device 16 adopts a mode of connecting two stages of filtering devices in series; the device is formed by sequentially connecting a primary filtering liquid inlet pipe 1, a primary filtering device, a secondary filtering liquid inlet pipe 2, a secondary filtering device and a secondary filtering liquid outlet pipe 3;
furthermore, the primary filtering device is formed by connecting n sets of primary filtering systems in parallel; each set of primary filtering system is formed by sequentially connecting a primary filtering liquid inlet valve 15-1, a primary filter element 6-1 and a primary filtering liquid outlet valve 15-2; the secondary filtering device is formed by connecting n sets of secondary filtering systems in parallel; each set of secondary filtering system is formed by sequentially connecting a secondary filtering liquid inlet valve 15-3, a secondary filter element 6-2 and a secondary filtering liquid outlet valve 15-4.
Further, n is 2 or 3, and during operation, 1 set of first-stage filtering system and 1 set of second-stage filtering system are standby filtering systems.
Furthermore, the backflushing pipe 4 is connected with a backflushing liquid inlet valve 15-5, a first-stage filter element 6-1 or a second-stage filter element 6-2 and a drain valve 15-6 in sequence and then is connected with a drain pipe 5.
Furthermore, the first-stage filter element 6-1 and the second-stage filter element 6-2 adopt 316L stainless steel metal mesh folding filter elements.
Furthermore, the filter diameter of the first-stage filter element 6-1 is 10-50 μm, and the filter diameter of the second-stage filter element 6-2 is 5-10 μm.
Further, the static mixer 14, which is an SV static mixer, includes a main pipe 17 and a branch pipe 18, the compressed air enters from the main pipe 17, and the betting liquid enters from the branch pipe 18.
The invention discloses a backwash filtering method for in-situ leaching uranium mining, which uses a filtering system provided by the invention and comprises the following steps:
step one, carrying out solution analysis;
analyzing the content and the particle size distribution of solid particles in underground water or leachate solution, analyzing main chemical components in the solution, particularly predicting the change of solids in the solution due to the change of hydrodynamic conditions, pH values and Eh values or components which may generate precipitates by reacting with strata, and further determining the filter diameters of the first-stage filter element 6-1 and the second-stage filter element 6-2;
step two, normal filtration;
filtering the leachate or the bottom pouring liquid through a primary filtering liquid inlet pipe 1, a primary filtering device, a secondary filtering liquid inlet pipe 2 and a secondary filtering device in sequence, and enabling the obtained filtrate to flow out of a secondary filtering liquid outlet pipe 3;
thirdly, performing backwashing operation;
when the pressure difference before and after filtration of the primary filter element 6-1 is greater than 0.2MPa or the pressure difference before and after filtration of the secondary filter element 6-2 is greater than 0.4MPa, starting a standby filter system, and then shutting down the filter system needing backwashing to prepare backwashing;
fourthly, controlling the pressure of the compressed air in the air bag 7 to be 0.4-0.6Mpa through a pressure stabilizing valve A9-1; the lower injection liquid in the lower injection liquid container 8 is controlled to be 0.6-0.8MPa through a pressure stabilizing valve B9-2; opening the flow regulating valve A13-1 and the flow regulating valve B13-2 in sequence to fully mix the compressed air and the lower injection liquid in the static mixer 14 to obtain a backwashing medium;
and step five, opening a backflushing liquid inlet valve 15-5 and a blow-down valve 15-6, and backflushing the first-stage filter element 6-1 and the second-stage filter element 6-2 which need to be backflushed until no iron or visible solid particles exist in the backflushing water, and ending the backflushing.
Furthermore, in the back flushing medium, the ratio of the compressed air to the injection liquid is 5:1-10:1 by volume.
According to the back washing process, in the field implementation process, the back washing time of 6 filter elements is 30-45 minutes, and the pressure difference of the first stage and the second stage after the back washing is less than 0.1 MPa. Water recoil and gas recoil are adopted, and the differential pressure after the recoil is more than 0.1 MPa; gas and water are adopted for back flushing alternately, and the back flushing time is more than 1 hour. The back-flushing water consumption of the three back-flushing modes is at least 30% larger than that of the embodiment. The invention has obvious backflushing effect, water saving and time saving effects.
Claims (6)
1. The utility model provides a but ground soaks uranium mining backwash filtration system which characterized in that: comprises a filtering device (16), a static mixer (14), a gas bag (7), a liquid pouring container (8), a pressure stabilizing valve, a check valve, a gas flowmeter (11), an electromagnetic flowmeter (12) and a flow regulating valve;
the air bag (7) is connected with the static mixer (14) through a pressure stabilizing valve A (9-1), a check valve A (10-1), a gas flowmeter (11) and a flow regulating valve A (13-1) and is used for providing compressed air;
the lower pouring liquid container (8) is connected with the static mixer (14) through a pressure stabilizing valve B (9-2), a check valve B (10-2), an electromagnetic flowmeter (12) and a flow regulating valve B (13-2) and is used for providing a back flushing liquid;
the static mixer (14) is used for fully mixing the compressed air and the lower pouring liquid and is connected with the filtering device (16) through the backflushing pipe (4); the static mixer (14) adopts an SV static mixer and comprises a main pipe (17) and a branch pipe (18), the compressed air enters from the main pipe (17), and the priming liquid enters from the branch pipe (18);
the filtering device (16) adopts a mode of connecting two stages of filtering devices in series; the device is formed by sequentially connecting a primary filtering liquid inlet pipe (1), a primary filtering device, a secondary filtering liquid inlet pipe (2), a secondary filtering device and a secondary filtering liquid outlet pipe (3);
the primary filtering device is formed by connecting n sets of primary filtering systems in parallel; each set of primary filtering system is formed by sequentially connecting a primary filtering liquid inlet valve (15-1), a primary filter element (6-1) and a primary filtering liquid outlet valve (15-2); the secondary filtering device is formed by connecting n sets of secondary filtering systems in parallel; each set of secondary filtering system is formed by sequentially connecting a secondary filtering liquid inlet valve (15-3), a secondary filter element (6-2) and a secondary filtering liquid outlet valve (15-4);
the backflushing pipe (4) is connected with the backflushing liquid inlet valve (15-5), the first-stage filter element (6-1) or the second-stage filter element (6-2) and the drain valve (15-6) in sequence and then is connected with the drain pipe (5).
2. The in-situ leaching uranium preparable backwash filter system of claim 1, wherein: and n is 2 or 3, and during operation, 1 set of primary filtering system and 1 set of secondary filtering system are standby filtering systems.
3. The in-situ leaching uranium preparable backwash filter system of claim 1, wherein: the first-stage filter element (6-1) and the second-stage filter element (6-2) adopt 316L stainless steel metal mesh folding filter elements.
4. The in-situ leaching uranium preparable backwash filter system of claim 1, wherein: the filter diameter of the first-stage filter element (6-1) is 10-50 μm, and the filter diameter of the second-stage filter element (6-2) is 5-10 μm.
5. A backwash filtering method for in-situ leaching uranium mining, characterized in that the filtering system of claim 1 is used, and the method comprises the following steps:
step one, carrying out solution analysis;
analyzing the content and the particle size distribution of solid particles in underground water or leachate solution, analyzing main chemical components in the solution, particularly components which are possibly precipitated due to changes of hydrodynamic conditions, pH values and Eh values or reaction with stratum, predicting changes of solids in the solution, and further determining the filter diameters of the first-stage filter element (6-1) and the second-stage filter element (6-2);
step two, normal filtration;
filtering the leachate or the bottom pouring liquid by a primary filtering liquid inlet pipe (1), a primary filtering device, a secondary filtering liquid inlet pipe (2) and a secondary filtering device in sequence, and enabling the filtered filtrate to flow out of a secondary filtering liquid outlet pipe (3);
thirdly, performing backwashing operation;
when the pressure difference before and after filtration of the primary filter element (6-1) is greater than 0.2MPa or the pressure difference before and after filtration of the secondary filter element (6-2) is greater than 0.4MPa, starting a standby filter system, and then shutting down the filter system needing backwashing to prepare backwashing;
fourthly, controlling the pressure of the compressed air in the air bag (7) to be 0.4-0.6Mpa through a pressure stabilizing valve A (9-1); the lower injection liquid in the lower injection liquid container (8) is controlled to be 0.6-0.8MPa through a pressure stabilizing valve B (9-2); opening a flow regulating valve A (13-1) and a flow regulating valve B (13-2) in sequence to fully mix compressed air and the lower injection liquid in a static mixer (14) to obtain a backwashing medium;
and step five, opening a backflushing liquid inlet valve (15-5) and a blow-down valve (15-6), and backflushing the first-stage filter element (6-1) and the second-stage filter element (6-2) which need to be backflushed until no iron or visible solid particles exist in backflushing water, and ending the backflushing.
6. The backwash filtering method for in-situ leaching uranium mining as defined in claim 5, wherein: in the back flushing medium, the ratio of the compressed air to the lower injection liquid is 5:1-10:1 by volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604195.5A CN109736770B (en) | 2018-12-26 | 2018-12-26 | Backwashing filtering system and method for in-situ leaching uranium mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604195.5A CN109736770B (en) | 2018-12-26 | 2018-12-26 | Backwashing filtering system and method for in-situ leaching uranium mining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109736770A CN109736770A (en) | 2019-05-10 |
| CN109736770B true CN109736770B (en) | 2021-07-20 |
Family
ID=66361299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811604195.5A Active CN109736770B (en) | 2018-12-26 | 2018-12-26 | Backwashing filtering system and method for in-situ leaching uranium mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109736770B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111335865A (en) * | 2020-03-25 | 2020-06-26 | 核工业北京化工冶金研究院 | Advanced closed type liquid pumping and injecting system for in-situ leaching uranium mining mine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1282586A (en) * | 1968-07-26 | 1972-07-19 | Sulzer Ag | Improvements in and relating to water filtration plant |
| CN200963540Y (en) * | 2006-10-31 | 2007-10-24 | 大庆油田有限责任公司 | Automatic counter washing pollution discharging device for pollution filter |
| CN101811784A (en) * | 2009-12-22 | 2010-08-25 | 南通北辰机械设备制造有限公司 | Filtering process for removing ferromanganese in water purification treatment and filter thereof |
| AU2008291737B2 (en) * | 2007-08-24 | 2011-04-14 | Sasol Technology (Proprietary) Limited | Process for producing liquid and gaseous products from gaseous reactants |
| CN102743920A (en) * | 2012-07-17 | 2012-10-24 | 上海艾科液压技术有限公司 | Secondary filtering device of rolled oil |
| CN105625295A (en) * | 2016-03-09 | 2016-06-01 | 上海长凯岩土工程有限公司 | Foundation pit groundwater recharging system |
-
2018
- 2018-12-26 CN CN201811604195.5A patent/CN109736770B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1282586A (en) * | 1968-07-26 | 1972-07-19 | Sulzer Ag | Improvements in and relating to water filtration plant |
| CN200963540Y (en) * | 2006-10-31 | 2007-10-24 | 大庆油田有限责任公司 | Automatic counter washing pollution discharging device for pollution filter |
| AU2008291737B2 (en) * | 2007-08-24 | 2011-04-14 | Sasol Technology (Proprietary) Limited | Process for producing liquid and gaseous products from gaseous reactants |
| CN101811784A (en) * | 2009-12-22 | 2010-08-25 | 南通北辰机械设备制造有限公司 | Filtering process for removing ferromanganese in water purification treatment and filter thereof |
| CN102743920A (en) * | 2012-07-17 | 2012-10-24 | 上海艾科液压技术有限公司 | Secondary filtering device of rolled oil |
| CN105625295A (en) * | 2016-03-09 | 2016-06-01 | 上海长凯岩土工程有限公司 | Foundation pit groundwater recharging system |
Non-Patent Citations (1)
| Title |
|---|
| CO2+O2 地浸采铀水冶铀回收工艺中树脂板结问题及解决方法研究;郑文娟等;《中国核科学技术进展报告（第四卷）》;20150930;223-227 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109736770A (en) | 2019-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103030237B (en) | Treatment device and treatment method for recycling coal slurry sewage | |
| CN112691789B (en) | Cold-rolled emulsion filtering system and method considering multiple series of products | |
| CN101712516B (en) | Device and method for deeply treating mine water for underground coal mine | |
| CN109736770B (en) | Backwashing filtering system and method for in-situ leaching uranium mining | |
| CN201212391Y (en) | High-pressure desander plant | |
| CN208577551U (en) | A kind for the treatment of mine drainage is the nanofiltration device of drinking water source | |
| CN103055573B (en) | Concentrated filtering device and cleaning method of filter elements | |
| CN114133057A (en) | Mine water underground modular reverse osmosis treatment and recycling equipment | |
| CN203683252U (en) | Water preparing system for emulsion for mobile small mine working face | |
| CN201581021U (en) | Mine water advanced treatment device for coal mine underground | |
| CN103990313A (en) | Low-permeability oilfield produced water filtering system and backwashing process thereof | |
| CN201997169U (en) | Sewage treatment turntable-type filter tank | |
| CN209481362U (en) | A kind of comprehensive sewage treatment system | |
| CN211056750U (en) | Sewage filter and filter material collector | |
| CN214243985U (en) | Anti-sedimentation mine water purification treatment system | |
| CN1306226C (en) | Well head system for geothermal tertiary system sandstone recharge | |
| CN204637742U (en) | A kind of chemical sludge filtration treatment device | |
| CN110759400A (en) | Sewage filter, filter material collector and backwashing method | |
| CN103861348A (en) | Double-filtering-drum filter with online automatic washing function | |
| CN209302337U (en) | Sewage anti-clogging filter device | |
| CN208949028U (en) | A kind of processing system of coal mine drainage water | |
| CN203291574U (en) | Skid-mounted fresh water filter | |
| CN204675944U (en) | Mobile skid-mounted advanced sewage treatment system | |
| CN110467246A (en) | Integrated water purifier | |
| CN210030062U (en) | Bright black diamond recovery unit after purification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |