CN115253479A - Brine purification device and method for magnesium cementing material - Google Patents
Brine purification device and method for magnesium cementing material Download PDFInfo
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- CN115253479A CN115253479A CN202210918739.5A CN202210918739A CN115253479A CN 115253479 A CN115253479 A CN 115253479A CN 202210918739 A CN202210918739 A CN 202210918739A CN 115253479 A CN115253479 A CN 115253479A
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- brine
- storage tank
- tank
- filter press
- settling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/40—Magnesium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B9/00—Magnesium cements or similar cements
- C04B9/04—Magnesium cements containing sulfates, nitrates, phosphates or fluorides
Abstract
The utility model provides a magnesian cementing material brine purifier and method for, belongs to brine purification technical field, including mixing machine, settling cask, plate and frame filter press, high concentration brine agitator tank, brine storage tank, the discharge end that mixes the machine links to each other with the settling cask, the discharge end of settling cask links to each other with the plate and frame filter press, the discharge end of plate and frame filter press links to each other with the brine storage tank, the discharge end of high concentration brine agitator tank links to each other with the feed end of plate and frame filter press. According to the invention, a brine purification system is adopted before a brine preparation system, so that suspended matters and insoluble matters in brine are effectively removed. The on-line baume degree detection equipment is arranged in the brine storage tank, the baume degree value change of the brine is detected in real time, water and high-concentration brine are automatically controlled to be added through the change of the degree value, and the baume degree of the brine in the storage tank meets the production control requirement.
Description
Technical Field
The invention belongs to the technical field of brine purification, and particularly relates to a brine purification device and method for a magnesium cementing material.
Background
The bittern is magnesium sulfate solution or magnesium chloride solution in certain concentration and is mixed with light burnt magnesia to form MgO-MgSO 4 (or MgCl) 2 ）—H 2 O ternary system air hardening gelled material. The brine is usually in the concentration rangeBaume degree means that in the production process, brine solution meeting production requirement needs to be prepared, and when the Baume degree of brine is low, more water in a reaction system can react with active magnesium oxide to generate Mg (OH) 2 Affecting product strength; when the Baume degree of the brine is higher, the unreacted MgSO can be generated in the reaction system 4 The phenomenon of 'blooming' of the product can be caused, so that the proper baume degree has very important influence on the product performance of the magnesium cement material.
At present, the magnesium cementing material brine is mainly prepared in a direct mode, namely, about one half of water is injected into a stirring tank in advance, a stirring paddle is started to stir, then magnesium sulfate solid with a certain weight is injected into the water to stir, water is continuously injected to adjust the baume degree of the solution to a specified value after the solid is dissolved, and solid magnesium sulfate is continuously added to adjust if the baume degree of the solution is lower. The method for measuring the baume degree of the solution comprises the steps of stirring the solution for a certain time, fishing partial brine in a beaker, and measuring by using a baume meter.
The current brine preparation method mainly has the following problems: firstly, the brine is large in usage amount in production, magnesium sulfate solid is directly poured into water for stirring, and huge disturbance can be brought to the stirring process due to the fact that the magnesium sulfate injection amount is too large, and large influence is brought to a stirring motor. Secondly, the poured magnesium sulfate solid can sink into the bottom of the pot without being dissolved. And thirdly, a brine purification process is not adopted, and suspended impurities and insoluble substances in brine flow along with the brine, so that pipeline blockage is easily caused or the energy consumption of a pump is increased. Fourthly, insoluble substances are easy to deposit at the bottom of the stirring tank, and the long-term accumulation of the insoluble substances can cause great influence on the overall quality of the brine. Fifthly, cleaning the stirring tank needs to be interrupted, and production efficiency is reduced. And sixthly, the brine baume degree detection adopts a traditional sampling detection mode, so that the detection result is lagged, and the quality of the brine is not monitored timely.
Insoluble impurities contained in brine can greatly affect the performance of the formed cementing material, and various researches show that the coagulation time of the cementing material is increased along with the increase of the content of the impurities in the brine; the increase of the impurity content influences the hydration hardening reaction speed and the heat release rate of the cementing material; the compressive strength and the flexural strength of the cementing material product are also obviously reduced along with the increase of the impurity content; furthermore, impurities in the brine can cause a significant reduction in the water resistance of the cementitious material.
Disclosure of Invention
In view of the above disadvantages and shortcomings of the prior art, the present invention provides a brine purification apparatus and method for magnesium-based cementitious material, which effectively removes suspended substances and insoluble substances in brine and improves brine quality by using a brine purification system before a brine preparation system. Meanwhile, the magnesium sulfate solid is fully mixed by adopting a brine pre-stirring mode. The on-line baume degree detection equipment is arranged in the brine storage tank, the variation of the baume degree value of the brine is detected in real time, water and high-concentration brine are automatically controlled to be added through the variation of the degree value, and the baume degree of the brine in the storage tank meets the production control requirement.
In order to achieve the purpose, the invention adopts the main technical scheme that:
the utility model provides a magnesian cementing material brine purifier, is including mixing machine, settling cask, plate and frame filter press, high concentration brine agitator tank, brine storage tank, the discharge end that mixes the machine links to each other with the settling cask, the discharge end of settling cask links to each other with plate and frame filter press, plate and frame filter press's discharge end links to each other with the brine storage tank, the discharge end of high concentration brine agitator tank links to each other with plate and frame filter press's feed end.
Further, the brine storage tank is connected for a plurality of brine storage tank tandem system, is equipped with water on every brine storage tank and adds pipeline and valve, is equipped with online baume degree detector in every brine storage tank, valve and high concentration brine agitator tank discharge valve are added to the water of online baume degree detector and brine storage tank link to each other.
Further, settling cask discharge opening and discharge valve are equipped with to settling cask bottom, settling cask discharge opening below is equipped with the impurity recovery pond, be equipped with the feed line that links to each other with another plate and frame filter press in the impurity recovery pond, the discharge end of another plate and frame filter press links to each other with the brine storage tank.
Furthermore, the bottom of the impurity recovery tank is of a slope structure, and a waste water outlet is formed in the bottom end of the slope.
Furthermore, brine storage tank bottom is equipped with storage tank discharge opening and discharge valve, the storage tank discharge opening links to each other with the impurity recovery pond.
Further, the mixer is a double-shaft paddle mixer.
The method for purifying the magnesium cementing material by brine by adopting the device comprises the steps of fully dissolving magnesium sulfate in a mixer, injecting the fully dissolved magnesium sulfate into a settling tank for settling, removing insoluble impurities from the settled brine by a plate-and-frame filter press, and feeding the impurity-removed brine into a brine storage tank; an online baume degree detector is arranged in the brine storage tank, and the system controls the opening of a water adding valve of the brine storage tank and the opening of a discharging valve of a high-concentration brine stirring tank in real time according to the baume degree value of the solution in the brine storage tank, so that the concentration of the brine in the brine storage tank is adjusted.
Further, the method also comprises the steps that the impurity-containing solution at the bottom of the settling tank and the brine storage tank enters an impurity recovery tank, and the supernatant is filtered by another plate-and-frame filter press and enters the brine storage tank.
Further, the magnesium sulfate is fully dissolved in the mixer to ensure that the baume degree of the brine is higher than the baume value 1-2 DEG Be required by production, and the brine concentration in the high-concentration brine stirring tank is 30 +2 °Bé。
Furthermore, the settling tank adopts an overflow mode for settling, and brine entering the settling tank is subjected to layer-by-layer overflow plates to deposit insoluble impurities in the brine.
The invention has the beneficial effects that: the invention provides a brine purification device and method for a magnesium cementing material. Meanwhile, the magnesium sulfate solid is fully mixed by adopting a brine pre-stirring mode. The on-line baume degree detection equipment is arranged in the brine storage tank, the baume degree value change of the brine is detected in real time, water and high-concentration brine are automatically controlled to be added through the change of the degree value, and the baume degree of the brine in the storage tank meets the production control requirement. The production quality and the production efficiency are improved, and the personnel allocation is reduced.
Drawings
FIG. 1 is a schematic view of a brine purification apparatus for a magnesian cementitious material according to the present invention;
fig. 2 is a schematic structural diagram of a settling tank.
The components in the figure: 1 is a solid feed hopper; 2 is a blanking pipe; 3 is a mixer; 4 is a settling tank; 5, an impurity recovery pool; 6, a plate-and-frame filter press; 7 is a high-concentration brine stirring tank; 8 is a brine storage tank; 9 is a pre-purified brine inlet; 10 is an overflow plate; 11 is a brine outlet; 12 is a trash discharge port.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
As shown in fig. 1, the present invention relates to a brine purification apparatus and method for magnesium-based cementitious material, wherein the apparatus comprises a mixer 3, a settling tank 4, a plate-and-frame filter press 6, a high-concentration brine stirring tank 7, and a brine storage tank 8. Mix machine 3 and mix the machine for biax paddle, biax paddle mixes machine upper end and is equipped with solid feed inlet 1, and 1 bottom of solid feed inlet is connected with mixing machine 3 through unloading pipe 2 and feed valve, mixes and still is equipped with water feeding pipeline and valve on the machine 3, mixes and is connected with the pre-purification brine entry 9 of 4 tops of settling cask through pipeline and valve in 3 bottoms of machine. Settling cask 4 structure is as shown in fig. 2, the overflow plate 10 of crisscross setting from top to bottom once is equipped with in the outside-in settling cask 4, the overflow plate 10 that is close to 9 one sides of pre-purification brine entry sets up from top to bottom, the overflow mouth is left to the below, the outlet pipe from bottom to top setting of pre-purification brine entry 9 is kept away from at the center, the delivery port sets up in the top, the overflow plate 10 from bottom to top that is close the outlet pipe sets up, its top is equivalent with outlet pipe top position, the overflow plate 10 that is close to the outlet pipe can be equipped with the slope of leanin and overflow plate 10 and outlet pipe outer wall can set up the brush, in order to improve the effect of edulcoration. The discharge end of the settling tank 4 is connected with the plate-and-frame filter press 6, and the overflowed brine enters the plate-and-frame filter press 6 through a brine outlet 11 of the outlet pipe to further remove insoluble impurities. The plate frameThe discharge end of pressure filter 6 links to each other with brine storage tank 8, and the brine after flowing from 6 flows of plate-and-frame pressure filter gets into brine storage tank 8. Brine storage tank 8 is connected for a plurality of brine storage tank series connection, is equipped with water on every brine storage tank 8 and adds pipeline and valve, is equipped with online baume degree detector in every brine storage tank 8, online baume degree detector links to each other with the water of brine storage tank 8 and adds valve and 7 discharge valve of high concentration brine agitator tank. The concentration of the brine in the high-concentration brine stirring tank is 30 +2 °Bé。
And the discharge end of the high-concentration brine stirring tank 7 is connected with the feed end of the plate-and-frame filter press 6. When the brine concentration in the brine storage tank 8 needs to be adjusted, the brine in the high-concentration brine stirring tank 7 enters the plate-and-frame filter press 6, and is filtered by the plate-and-frame filter press 6 and then enters the brine storage tank 8.
The online baume degree detector is connected with a water adding valve of the brine storage tank 8 and a discharging valve of the high-concentration brine stirring tank 7. The system controls a water adding valve of the brine storage tank 8 and the opening of a discharging valve of the high-concentration brine stirring tank 7 in real time according to the baume value of the solution in the brine storage tank 8, and further adjusts the concentration of the brine in the brine storage tank 8, so that the baume value of the storage tank meets the production control requirement. The control part of the system for adjusting the valve opening of the valve according to the concentration detected by the online baume degree detector belongs to the prior art, and the system can be realized according to the prior control system in the field.
4 bottoms of settling cask are equipped with settling cask discharge opening and discharge valve, can be between two adjacent overflow plates and overflow plate and jar wall, and jar body bottom between overflow plate and the outlet pipe sets up discharge opening and discharge valve to the efficient is got rid of tank bottoms impurity.
And an impurity recovery tank 5 is arranged below the discharge opening of the settling tank, a feeding pipeline connected with another plate and frame filter press 6 is arranged in the impurity recovery tank 5, and the discharge end of the other plate and frame filter press 6 is connected with a brine storage tank 8. 8 bottoms in brine storage tank are equipped with storage tank discharge opening and discharge valve, the storage tank discharge opening links to each other with impurity recovery pond 5. Settling tank bottom and brine storage tank bottom contain in impurity solution accessible pipeline and pump flow to impurity recovery pond 5, 5 bottoms in impurity recovery pond are the slope structure, and the bottom of slope is equipped with the wastewater discharge mouth, and the eminence end top of slope is equipped with pipeline and the pump of being connected with another plate and frame filter press 6, flows into brine storage tank 8 after filtering through plate and frame filter press 6. The whole device is provided with necessary pipelines, pumps and valves.
The method for purifying the brine for the magnesium cementing material by adopting the device comprises the steps of fully dissolving magnesium sulfate in the mixer 3, injecting the solution into the settling tank 4 for settling, settling in an overflow mode in the settling tank, and depositing insoluble impurities in the brine through a layer-by-layer overflow plate by using the brine entering the settling tank. The magnesium sulfate is fully dissolved in the mixer 3, so that the baume degree of the brine is slightly higher than the baume value required by production and is 1-2 DEG Be higher than the baume value required by production. When the brine concentration in the brine storage tank 8 needs to be adjusted, the high-concentration brine in the high-concentration brine stirring tank 7 enters the brine storage tank 8 through the plate-and-frame filter press 6; an online baume degree detector is arranged in the brine storage tank 8, and the system adjusts the opening degree of a water adding valve of the brine storage tank 8 and a discharge valve of the high-concentration brine stirring tank 7 in real time according to the baume degree value of the solution in the brine storage tank 8, so that the concentration of the brine in the brine storage tank 8 is adjusted.
The method also comprises the steps that the impurity-containing solution at the bottoms of the settling tank 4 and the brine storage tank 8 enters the impurity recovery tank 5, and the supernatant is filtered by the other plate-and-frame filter press 6 and enters the brine storage tank 8.
When the magnesium sulfate double-shaft paddle mixer is used, solid magnesium sulfate is poured into the solid feeding hopper, and the amount of magnesium sulfate added into the double-shaft paddle mixer is controlled by adjusting the opening and closing of a valve between the feeding hopper and the discharging pipe. A certain amount of water is injected into the double-shaft paddle mixer in advance (according to experience, the baume value of the brine mixed by the double-shaft paddle mixer is slightly higher than the baume value required by production at 1-2 degrees). After the magnesium sulfate solution is fully dissolved by stirring, brine is injected into the settling tank through the discharging hole in the lower part, the settling tank is settled in an overflow mode, the brine entering the settling tank slowly deposits insoluble impurities in the brine through layer-by-layer overflow plates, the brine after passing through the settling tank enters the plate-and-frame filter press to further remove the insoluble impurities, and the brine after flowing out of the plate-and-frame filter press enters the brine storage tank. The bottom of the settling tank is provided with a discharge opening and a discharge valve, overflow liquid and settled impurities stored in the tank can flow into an impurity recovery tank through a feed opening, the bottom of the impurity recovery tank is designed to be an inclined plane, and liquid at the upper part after settling enters another platen frame filter press through a pump and then is injected into a brine storage tank. The front end of the first platen frame filter press is provided with a high-concentration brine stirring tank, and the high-concentration brine stirring tank is provided with a feed hopper and a discharge hopper and is used for preparing high-concentration brine to adjust the Baume degree of the brine storage tank.
The brine storage tank is connected in a plurality of series connection modes. Each storage tank is internally provided with two baume meters with online baume degree detection functions. The water inlet and the high-concentration brine inlet are automatically adjusted according to the Baume degree in the brine storage tank, so that the Baume degree of the storage tank meets the production control requirement. The bottom of each brine storage tank is provided with a discharging hole, and the sediment in each storage tank is periodically circulated to prevent the structure of the bottom or the wall of the tank.
According to the invention, a brine purification system is adopted before a brine preparation system, so that suspended matters and insoluble substances in brine are effectively removed, and the quality of the brine is improved. Meanwhile, the invention adopts a brine pre-stirring mode to fully mix the magnesium sulfate solids. An online baume degree detection device is arranged in the brine storage tank, the baume degree value change of the brine is detected in real time, and water and high-concentration brine are automatically controlled to be added through the change of the degree value. The production quality is improved, the production efficiency is increased, and the personnel allocation is reduced.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a magnesian brine purifier for cementitious material, its characterized in that, including mixing machine (3), settling cask (4), plate and frame filter press (6), high concentration brine agitator tank (7), brine storage tank (8), the discharge end that mixes machine (3) links to each other with settling cask (4), the discharge end of settling cask (4) links to each other with plate and frame filter press (6), the discharge end of plate and frame filter press (6) links to each other with brine storage tank (8), the discharge end of high concentration brine agitator tank (7) links to each other with the feed end of plate and frame filter press (6).
2. The brine purification device for the magnesium cement material according to claim 1, wherein: brine storage tank (8) are connected for a plurality of brine storage tank series connection, are equipped with water on every brine storage tank (8) and add pipeline and valve, are equipped with online baume degree detector in every brine storage tank (8), online baume degree detector links to each other with the water of brine storage tank (8) and adds valve and high concentration brine agitator tank (7) ejection of compact valve.
3. The brine purification device for the magnesium cementing material according to claim 1, characterized in that: the improved brine treatment device is characterized in that a settling tank discharge opening and a discharge valve are arranged at the bottom of the settling tank (4), an impurity recovery tank (5) is arranged below the settling tank discharge opening, a feed pipeline connected with another plate and frame filter press (6) is arranged in the impurity recovery tank (5), and the discharge end of the other plate and frame filter press (6) is connected with a brine storage tank (8).
4. The brine purification device for the magnesium cementing material according to the claim 3, characterized in that: the bottom of the impurity recovery tank (5) is of a slope surface structure, and a waste water outlet is formed in the bottom end of the slope surface.
5. The brine purification device for the magnesium cementing material according to the claim 4, characterized in that: brine storage tank (8) bottom is equipped with storage tank discharge opening and discharge valve, the storage tank discharge opening links to each other with impurity recovery pond (5).
6. The brine purification device for the magnesium cement material according to claim 1, wherein: the mixer (3) is a double-shaft paddle mixer.
7. A method for purifying magnesium gelled material by brine by adopting the device of any one of claims 1 to 6, which is characterized by comprising the steps of injecting magnesium sulfate into a settling tank (4) for settling after the magnesium sulfate is fully dissolved in a mixer (3), removing insoluble impurities from the settled brine by a plate-and-frame filter press (6), and feeding the purified brine into a brine storage tank (8); an online baume degree detector is arranged in the brine storage tank (8), and the system controls a water adding valve of the brine storage tank (8) and the opening of a discharging valve of the high-concentration brine stirring tank (7) in real time according to the baume degree value of the solution in the brine storage tank (8), so that the concentration of the brine in the brine storage tank (8) is adjusted.
8. The brine purification method for magnesium cement material according to claim 7, further comprising the steps of feeding the impurity-containing solution at the bottom of the settling tank (4) and brine storage tank (8) into the impurity recovery tank (5), and filtering the supernatant into the brine storage tank (8) through another plate and frame filter press (6).
9. Process for purifying magnesium cement brine according to claim 7, wherein the magnesium sulfate is sufficiently dissolved in the mixer (3) to obtain a baume value of 1-2 ° Be higher than the value required for production, and the brine concentration in the high-concentration brine mixing tank (7) is 30% +2 °Bé。
10. The method for purifying magnesium cement material with brine as claimed in claim 7, wherein the settling tank is used for settling by overflow, and the brine entering the settling tank is passed through layer-by-layer overflow plates to deposit insoluble impurities in the brine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210918739.5A CN115253479A (en) | 2022-08-02 | 2022-08-02 | Brine purification device and method for magnesium cementing material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210918739.5A CN115253479A (en) | 2022-08-02 | 2022-08-02 | Brine purification device and method for magnesium cementing material |
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| CN202210918739.5A Pending CN115253479A (en) | 2022-08-02 | 2022-08-02 | Brine purification device and method for magnesium cementing material |
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| JP2008297568A (en) * | 2007-05-29 | 2008-12-11 | Nippon Rensui Co Ltd | Method of electrolyzing sodium chloride aqueous solution |
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