CN218795889U - Device for preparing calcium sulfate whiskers and treating wastewater - Google Patents
Device for preparing calcium sulfate whiskers and treating wastewater Download PDFInfo
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- CN218795889U CN218795889U CN202222893749.6U CN202222893749U CN218795889U CN 218795889 U CN218795889 U CN 218795889U CN 202222893749 U CN202222893749 U CN 202222893749U CN 218795889 U CN218795889 U CN 218795889U
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Abstract
The utility model relates to a device for preparing calcium sulfate whiskers and treating wastewater, which comprises a hydrothermal reaction kettle, a centrifugal machine, a liquid storage tank and a wastewater treatment system, wherein the discharge of the hydrothermal reaction kettle enters the centrifugal machine, the solid discharge of the centrifugal machine is collected as a product, and the liquid discharge of the centrifugal machine enters the liquid storage tank and is sent into the wastewater treatment system after being cooled; the wastewater treatment system comprises a precipitation zone, a filtering zone and an ion resin exchange zone, wherein the wastewater from the centrifuge is sent into the precipitation zone for precipitation, the supernatant of the precipitation zone enters the filtering zone, the effluent of the filtering zone is sent into the ion resin exchange zone, and the effluent of the ion resin exchange zone is treated new water. The beneficial effects of the utility model are that: the utility model provides a preparation calcium sulfate whisker and waste water treatment's device provides corresponding water treatment process for handling the waste liquid that causes because of hydrothermal reaction simultaneously, the utility model discloses waste water after the processing can become new water retrieval and utilization. The utility model discloses the small investment, running cost are low.
Description
Technical Field
The utility model belongs to the technical field of calcium sulfate whisker production and waste water retreatment cyclic utilization, especially, relate to a device of preparation calcium sulfate whisker and waste water treatment.
Background
The calcium sulfate whisker has higher added value, is short fiber grown in a single crystal form, and has uniform cross section, complete appearance and highly perfect internal structure. Compared with glass fiber, the glass fiber has the advantages that the glass fiber has extremely high strength and fine size, is easier to combine with organic high molecular compounds such as resin, rubber, plastic and the like, and has excellent appearance quality; the method can be widely applied to the fields of automobiles, aerospace, chemical engineering, metallurgy, national defense, machinery, electricity, ships, petroleum, building materials and the like.
Production units of enterprises, universities and colleges and the like prepare the calcium sulfate whiskers by taking gypsum, phosphogypsum, flue gas desulfurization gypsum and the like as raw materials. The utility model discloses provide for the first time and adopt hydrothermal reaction to prepare the calcium sulfate whisker, from hydrothermal reactor preparation calcium sulfate whisker after, need adopt the centrifugal dehydration mode with solid-state calcium sulfate whisker and aqueous solution separation in the hydrothermal reactor. Thus, the hydrothermal reaction method for preparing the calcium sulfate whisker product discharges waste liquid after the calcium sulfate whisker is dehydrated. The utility model provides a process method for the wastewater treatment regeneration cycle of the waste liquid of the calcium sulfate crystal whisker preparation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a preparation calcium sulfate whisker and waste water treatment's device, the utility model provides a device and method of hydrothermal reaction preparation calcium sulfate whisker provides corresponding waste water treatment regeneration cycle technology to the waste water that hydrothermal reaction produced simultaneously.
In order to achieve the above object, the utility model adopts the following technical scheme:
a device for preparing calcium sulfate whiskers and treating wastewater comprises a hydrothermal reaction kettle, a centrifuge, a liquid storage tank and a wastewater treatment system, wherein the hydrothermal reaction kettle discharges materials to enter the centrifuge, solid discharge materials of the centrifuge are collected as products, and liquid discharge materials of the centrifuge enter the liquid storage tank to be cooled and then are sent to the wastewater treatment system; the wastewater treatment system comprises a precipitation zone, a filtering zone and an ion resin exchange zone, wherein the wastewater from the centrifuge is sent into the precipitation zone for precipitation, the supernatant of the precipitation zone enters the filtering zone, the effluent of the filtering zone is sent into the ion resin exchange zone, and the effluent of the ion resin exchange zone is treated new water.
The wastewater treatment system further comprises CO 2 An aeration tank, said CO 2 The aeration tank is arranged at the middle section of the filtering area, and the CO is 2 The gas introduced into the aeration tank is CO 2 Mixed gas with air.
The sedimentation zone comprises a stirring tank and two sedimentation tanks, the PH value of the water coming from the centrifuge is firstly adjusted in the stirring tank, then the water enters the first sedimentation tank for sedimentation, the supernatant of the first sedimentation tank enters the stirring tank again for PH value adjustment and then enters the second sedimentation tank, and the supernatant of the second sedimentation tank enters the filtration zone.
The hydrothermal reaction kettle is internally provided with a stirring paddle, the stirring paddle is provided with double-layer stirring paddles, the upper layer of the stirring paddle is in a cross shape, the lower layer of the stirring paddle is in a U shape, the bottom center position of the lower layer of the stirring paddle is fixedly connected with a stirring paddle shaft, and a lacing wire is arranged between two side wings of the lower layer of the stirring paddle and the stirring paddle shaft; the outer wall of the hydrothermal reaction kettle is provided with a heating device.
The heating device is electric heating or heat conducting oil heating or steam heating.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an adopt hydrothermal reaction preparation calcium sulfate whisker's device provides corresponding water treatment process for handling the waste liquid that causes because of hydrothermal reaction simultaneously, the utility model discloses waste water after the processing can become new water recycling. The utility model discloses the small investment, running cost are low.
Drawings
FIG. 1 is a process flow diagram of the present invention;
fig. 2 is a schematic structural diagram of the reaction kettle of the utility model.
In the figure: 1-hydrothermal reaction kettle, 2-centrifuge, 3-liquid storage tank, 4-stirring tank, 5-first precipitation tank, 6-second precipitation tank, 7-filtering area, 8-CO 2 Aeration tank, 9-ion resin exchange zone, 10-fresh water tank, 11-upper layer stirring blade, 12-heating device and 13-lower layer stirring blade.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, a device for preparing calcium sulfate whiskers and treating wastewater comprises a hydrothermal reaction kettle 1, a centrifuge 2, a liquid storage tank 3 and a wastewater treatment system, wherein the hydrothermal reaction kettle 1 discharges materials to enter the centrifuge 2, solid discharge of the centrifuge 2 is collected as a product, and liquid discharge of the centrifuge 2 enters the liquid storage tank 3 and is sent to the wastewater treatment system after being cooled;
the wastewater treatment system comprises a precipitation zone, a filtering zone 7 and an ion resin exchange zone 9, wherein the wastewater from the centrifuge 2 is sent into the precipitation zone for precipitation, the supernatant of the precipitation zone enters the filtering zone 7, the effluent of the filtering zone 7 is sent into the ion resin exchange zone 9, and the effluent of the ion resin exchange zone 9 is treated new water.
The wastewater treatment system further comprises CO 2 An aeration tank 8, the CO 2 The aeration tank 8 is arranged in the middle section of the filtering area 7, and the CO is 2 The gas introduced into the aeration tank 8 is CO 2 Mixed gas with air.
The sedimentation zone comprises a stirring tank 4 and two sedimentation tanks, wherein the PH value of the centrifuge incoming water is adjusted in the stirring tank 4, then the centrifuge incoming water enters a first sedimentation tank 5 for sedimentation, the supernatant of the first sedimentation tank 5 enters the stirring tank 4 again for PH value adjustment and then enters a second sedimentation tank 6, and the supernatant of the second sedimentation tank 6 enters a filtering zone 7.
A stirring paddle is arranged in the hydrothermal reaction kettle 1, the stirring paddle is provided with double-layer stirring blades, the upper-layer stirring blade 11 is in a cross shape, the lower-layer stirring blade 13 is in a U shape or a U shape, the central position of the bottom of the lower-layer stirring blade 13 is fixedly connected with a stirring paddle shaft, and a lacing wire is arranged between two side wings of the lower-layer stirring blade 13 and the stirring paddle shaft; the outer wall of the hydrothermal reaction kettle 1 is provided with a heating device 12. The bottom of the hydrothermal reaction kettle 1 is arc-shaped, and the lower stirring paddle 13 is U-shaped; the bottom of the hydrothermal reaction kettle 1 is flat, and the lower stirring blade 13 is selected to be U-shaped.
The utility model discloses a "ten" style of calligraphy upper stirring paddle leaf can guarantee not to destroy 2H 2 O·CaSO 4 Molecular group, and 2H control by stirring 2 O·CaSO 4 Sinking rate of molecular clusters.
The lower U-shaped or U-shaped stirring blade can control and weaken 1/2H 2 O·CaSO 4 And 2H 2 O·CaSO 4 Equal molecular brownian motion; all chemical molecules in the solution are ensured to be in an orderly motion state, and no dead angle is left during stirring; and the movement directions are consistent, so that the growth of the calcium sulfate whisker fiber is ensured.
The heating device 12 is an electric heating device, a heat conducting oil heating device or a steam heating device.
The embodiment of the utility model provides a raw materials for preparing calcium sulfate whisker is sintering flue gas semidry process desulfurization ash and sulphuric acid, and through the sample detection analysis, the characteristic of waste water is as follows:
Ca 2+ the concentration is 1600-2000mg/L;
Mg 2+ the concentration is 1200-1800mg/L;
K + the concentration is 5500-6000mg/L;
SO 4 2- the concentration is 3500-10000mg/L;
Cl - the concentration is 7000-8500mg/L;
Na + the concentration is 600-750mg/L;
the total Fe content in the wastewater is 160-200mg/L.
A production process of a device for preparing calcium sulfate whiskers and treating wastewater comprises the following steps:
1) Firstly, heating the hydrothermal reaction temperature in a reaction kettle to an initial temperature of 45 ℃, and then adding a calcium sulfate whisker preparation raw material to carry out hydrothermal reaction;
2) Discharging the slurry after the hydrothermal reaction into a centrifuge to realize solid-liquid separation, collecting the solid matters after the centrifugal separation as products, and feeding the slurry serving as wastewater into a stirring tank of a settling zone;
3) Adding calcium-based inorganic base, preferably CaO or Ca (OH) 2 The purpose of which is to add Ca 2+ With excess SO in the waste water 4 2- Reacting to generate CaSO 4 A precipitate;
4) Taking supernatant after the first precipitation, adding inorganic base again, stirring, controlling the pH value of the wastewater to be 12, and then sending the wastewater into a precipitation tank for secondary precipitation;
5) Filtering the supernatant after the second precipitation to remove suspended matters in the wastewater; the waste water filtration mainly comprises a quartz sand filter, an activated carbon filter, a multi-medium filter, an iron and manganese removing filter, a precision filter and the like due to different filter media. The utility model discloses can take any one of above-mentioned filter, nevertheless consider to compromise and get rid of the ferro-manganese in the waste water, propose to use the filter of removing ferro-manganese.
6) Introducing CO into the filtered wastewater 2 An aeration tank for introducing CO into the wastewater 2 Ca in wastewater 2+ And Mg 2+ With CO 3 2- Reaction to produce small or trace amount of CaCO 3 And MgCO 3 White precipitate to ensure Ca in the wastewater 2+ And Mg 2+ The concentration is controlled below 60 mg/L; introducing CO 2 The waste water is filtered by a precise filter or a pipeline type filter to remove a small amount or trace of CaCO 3 And MgCO 3 A white precipitate;
7) Removing Cl with higher concentration in wastewater by adopting ion resin exchange process - Ions; after the wastewater treatment process, cl in the wastewater - The concentration is 7000-8500mg/L, and the Cl is contained - Wastewater with higher concentration; meanwhile, the composition also contains lower concentration of Na +/K +/Ca 2+ /Mg 2+ /SO 4 2- /OH - And the like. So the utility model adopts the ion resin exchange of the combination of the first-level cation and the second-level anion aiming at the water characteristics of the raw material. The waste water after ion resin exchange treatment is regenerated new water. Regenerating Na +/K +/Ca contained in new water 2+ /Mg 2+ /SO 4 2- /Fe 2+ (Fe 3+ )/Cl - Plasma concentration is detected by a third-party professional detection mechanism, and the result is shown in table 1:
TABLE 1 summary of test data (unit: mg/L)
| Ca 2+ | Mg 2+ | K + | Na + | Cl - | SO 4 2- | TFe | |
| Raw material water | 1600-2000 | 1200-1800 | 5500-6000 | 600-750 | 7000-8500 | 3500-10000 | 160-200 |
| Regenerated fresh water | ≤18.6 | 0.02L | ≤158 | ≤245 | ≤233 | ≤65.6 | 0.03L |
In table 1: (1) 0.02L indicates that the detection limit of the method is lower.
(2) 0.03L indicates a detection limit below the method.
The wastewater treated by the wastewater treatment process can be continuously reused for preparing a raw material gypsum solution in the process of preparing the calcium sulfate whiskers.
Example 1:
the embodiment is based on the actual investment construction processing capacity of 2m 3 A set of wastewater treatment facilities specially used for receiving and treating the waste liquid after the preparation of the calcium sulfate crystal whiskers. The treatment process flow comprises the steps of alkaline precipitation, filtration and CO 2 Aeration + ion resin exchange system ", the area occupied is about 240 square meters. The specific operation is as follows:
operation 1: starting a pipeline pump to convey effluent of the centrifuge into an alkali-adding stirring tank, wherein the volume of the alkali-adding stirring tank is about 3m 3 About 150cm in diameter and about 180cm in height. When the liquid level of the wastewater is about 120cm, stopping water inflow, opening a CaO silo valve to feed the wastewater into the tank under a stirring state, continuously observing the change of a PH meter when CaO powder is added, stopping feeding when the PH value is larger than 6, and closing the CaO silo valve. After stirring for 30min, the wastewater was fed to the first precipitation tank.
Operation 2: primary precipitation of wastewater: and (4) feeding the waste water after the alkali is added into a first precipitation tank. The volume of the primary settling tank is about 10m 3 Design the retention time of the wastewater to 240min.
Operation 3: and the overflow water precipitated by the first precipitation tank enters a secondary alkali-adding stirring tank. The specification of the secondary alkali-adding stirring tank is the same as that of the primary alkali-adding stirring tank. The operation procedure is the same as in operation 1. In the operation, the secondary alkali addition is NaOH, and the PH value is controlled to be 12.
And operation 4: and the overflow water after secondary precipitation enters a filter. The filter is a filtering system consisting of a three-level manganese sand filter and a one-level activated carbon filter. The filtered waste water enters CO 2 An aeration tank.
And operation 5: CO 2 2 The volume of the aeration tank is 2m 3 . Design one CO 2 The pipeline of gas is arranged at the bottom of the water pool to form CO in the water 2 Bubbles, waste water in CO 2 After the aeration tank stays for 30min, the wastewater enters an ion resin exchange system through a first-stage precision filter.
And operation 6: and the wastewater continuously enters a regeneration new water collecting tank after ion resin exchange. Sampling and entrusting a third-party detection mechanism to analyze the waste water and the regenerated new water, and the analysis result is shown in table 2.
TABLE 2 summary of test data (unit: mg/L)
| Ca 2+ | Mg 2+ | K + | Na + | Cl - | SO 4 2- | TFe | |
| Before wastewater treatment | 1380 | 692 | 5230 | 629 | 7110 | 9670 | 1650 |
| Regenerated fresh water | 5.1 | 0.02L | 13.3 | 63.4 | 214 | 0.806 | 0.03L |
In table 2: (1) 0.02L indicates that the detection limit of the method is lower.
(2) 0.03L indicates a detection limit below the method.
Claims (5)
1. The device for preparing the calcium sulfate whiskers and treating the wastewater is characterized by comprising a hydrothermal reaction kettle, a centrifugal machine, a liquid storage tank and a wastewater treatment system, wherein the hydrothermal reaction kettle discharges materials to enter the centrifugal machine, solid discharge materials of the centrifugal machine are collected as products, and liquid discharge materials of the centrifugal machine enter the liquid storage tank to be cooled and then are sent to the wastewater treatment system; the wastewater treatment system comprises a precipitation zone, a filtering zone and an ion resin exchange zone, wherein the wastewater from the centrifuge is sent into the precipitation zone for precipitation, the supernatant of the precipitation zone enters the filtering zone, the effluent of the filtering zone is sent into the ion resin exchange zone, and the effluent of the ion resin exchange zone is treated new water.
2. The apparatus for preparing calcium sulfate whiskers and treating wastewater according to claim 1, wherein the wastewater treatment system further comprises CO 2 Aeration tank, said CO 2 The aeration tank is arranged at the middle section of the filtering area, and the CO is 2 The gas introduced into the aeration tank is CO 2 Mixed gas with air.
3. The device for preparing calcium sulfate whiskers and treating wastewater according to claim 1, wherein the precipitation zone comprises two stirring tanks and two precipitation tanks, water coming from a centrifuge is subjected to pH value adjustment in the stirring tanks and then enters a first precipitation tank for precipitation, supernatant of the first precipitation tank enters the stirring tanks again for pH value adjustment and then enters a second precipitation tank, and supernatant of the second precipitation tank enters the filtering zone.
4. The device for preparing the calcium sulfate whiskers and treating the wastewater according to claim 1, wherein a stirring paddle is arranged in the hydrothermal reaction kettle, the stirring paddle is provided with double-layer stirring blades, the upper layer stirring blade is in a cross shape, the lower layer stirring blade is in a U shape or U shape, the central position of the bottom of the lower layer stirring blade is fixedly connected with a stirring paddle shaft, and a pull rib is arranged between two side wings of the lower layer stirring blade and the stirring paddle shaft; and a heating device is arranged on the outer wall of the hydrothermal reaction kettle.
5. The device for preparing the calcium sulfate whiskers and treating the wastewater according to claim 4, wherein the heating device is electric heating or heat transfer oil heating or steam heating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222893749.6U CN218795889U (en) | 2022-11-01 | 2022-11-01 | Device for preparing calcium sulfate whiskers and treating wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222893749.6U CN218795889U (en) | 2022-11-01 | 2022-11-01 | Device for preparing calcium sulfate whiskers and treating wastewater |
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| CN218795889U true CN218795889U (en) | 2023-04-07 |
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| CN202222893749.6U Active CN218795889U (en) | 2022-11-01 | 2022-11-01 | Device for preparing calcium sulfate whiskers and treating wastewater |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230818 Address after: 114000 Anshan Anshan Iron and steel plant, Liaoning Province (ironmaking small machine repair) Patentee after: Angang industrial group (Anshan) equipment operation and maintenance Co.,Ltd. Address before: 114000 No.62 Garden Avenue, Lishan District, Anshan City, Liaoning Province Patentee before: Angang Metal Construction Co.,Ltd. |
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| TR01 | Transfer of patent right |