CN216396365U - Gas-liquid synthesis device of battery-grade iron phosphate - Google Patents
Gas-liquid synthesis device of battery-grade iron phosphate Download PDFInfo
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- CN216396365U CN216396365U CN202123050616.4U CN202123050616U CN216396365U CN 216396365 U CN216396365 U CN 216396365U CN 202123050616 U CN202123050616 U CN 202123050616U CN 216396365 U CN216396365 U CN 216396365U
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Abstract
The utility model relates to a gas-liquid synthesis device of battery-grade iron phosphate, which comprises a reaction separation kettle, wherein the upstream of the reaction separation kettle is at least communicated with three parallel streams, the first stream is led out from a raw material kettle, the second stream is led out from an alkali liquor kettle, the third stream is used for injecting washing water into the reaction separation kettle, at least one group of separation components for dynamically filtering and washing iron phosphate particles generated by reaction are arranged in the reaction separation kettle, each separation component comprises a hollow rotating shaft arranged in the reaction separation kettle in a penetrating manner and a plurality of hollow membranes distributed on the hollow rotating shaft at intervals, the hollow rotating shaft is communicated with a gas oxidant inlet pipe, the hollow membranes are communicated with the hollow rotating shaft, the surfaces of the membranes are provided with membrane holes which can enable the gas oxidant to be uniformly distributed from inner cavities to the surfaces of the membranes and enable liquid to penetrate through the surfaces to enter the inner cavities, the hollow rotating shaft is provided with a liquid outlet for discharging separated mother liquor and washing wastewater, the gas-liquid synthesis device has the advantages of high integration level, low production cost and environmental friendliness.
Description
Technical Field
The utility model belongs to the technical field of chemical production, and relates to a gas-liquid synthesis device for battery-grade iron phosphate.
Background
The iron phosphate is an important chemical raw material and can be used as a nontoxic antirust pigment, a catalyst and a ceramic glaze coating. In recent years, iron phosphate can also be used as a precursor for synthesizing lithium iron phosphate serving as a positive electrode material of a lithium battery, and compared with other precursors such as ferrous oxalate, ferric oxide, ferric chloride, ferric nitrate and the like, the iron phosphate can simultaneously provide an iron source and a phosphorus source, so that the synthesis process of the lithium iron phosphate is simplified, the pollutant discharge is reduced, and the lithium iron phosphate battery prepared by using the battery-grade iron phosphate has the advantages of low price, environmental friendliness, high thermal stability and the like. Currently, iron phosphate is gradually replacing other precursors to become a core precursor of lithium iron phosphate. The process route for synthesizing the lithium iron phosphate by using the iron phosphate is one of the most widely applied technical routes for preparing the lithium iron phosphate at present, the process route has high sintering rate for synthesizing the lithium iron phosphate, and the product has fine particle size and is mostly spherical in shape.
In the existing preparation method, iron phosphate can be obtained by reacting ferrous salt and phosphoric acid/phosphate under the action of an oxidant, a large amount of oxidant is consumed in the preparation method, wherein hydrogen peroxide, sodium hypochlorite, sodium chlorate, ammonium persulfate and the like can be used as the oxidant, the oxidants are usually used in liquid phase reaction, although the reaction process is easy to control, the requirement on safety is higher in the use process, or a large amount of solid waste salt can be generated as a byproduct, and the production cost is increased to a certain extent. Air or oxygen-enriched air (a certain amount of pure oxygen is mixed in the air) is used as an oxidant, so that the raw material cost can be greatly reduced, and the air is a non-dangerous chemical and has low safety management cost. The reaction system using the gas oxidant is a gas-liquid heterogeneous reaction, and the reaction rate is easily limited by the gas-liquid mass transfer process.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems, an object of the present invention is to provide a gas-liquid synthesis apparatus for preparing battery grade iron phosphate, which has consistent production batch and stable finished product quality, and has the advantages of high integration level, low production cost and environmental friendliness.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a gas-liquid synthesis device of battery-grade iron phosphate comprises a reaction separation kettle, wherein the upstream of the reaction separation kettle is at least communicated with three parallel streams, the first stream is led out from a raw material kettle, the second stream is led out from an alkali liquor kettle, and the third flow strand is used for injecting washing water into the reaction separation kettle, at least one group of separation components for dynamically filtering and washing the iron phosphate particles generated by the reaction are arranged in the reaction separation kettle, the separation component comprises a hollow rotating shaft which is arranged in the reaction separation kettle in a penetrating way, and a plurality of hollow membranes which are distributed on the hollow rotating shaft at intervals, the hollow rotating shaft is communicated with a gas oxidant inlet pipe, the hollow membrane is communicated with the hollow rotating shaft, membrane holes which can enable the gas oxidant to be uniformly distributed from the inner cavity to the surface of the membrane and enable liquid to penetrate through the surface and enter the inner cavity are distributed on the surface of the membrane, and the hollow rotating shaft is provided with a liquid discharge port used for discharging separated mother liquor clear liquid and washing wastewater.
In some technical schemes, at least one group of turbulence elements which are arranged in parallel to the hollow rotating shaft along the kettle wall are arranged in the reaction separation kettle, each turbulence element is a comb-shaped pipe fitting and comprises an internal hollow comb back fixedly arranged on the kettle wall and a plurality of hollow comb teeth extending from the comb back to the position between adjacent membranes, the comb back is respectively communicated with the first stream and the second stream, each comb tooth is communicated with the comb back, and the peripheral surfaces of the comb teeth are provided with jet holes which can enable raw material liquid and alkali liquor to penetrate through the surface and enter the cavity of the reaction separation kettle.
In some technical schemes, a plurality of flow disturbing elements are uniformly distributed to the inner peripheral side of the reaction separation kettle at intervals; or the comb back is annular, so that the turbulence element is constructed into a ring shape.
In some embodiments, the injection holes are uniformly distributed to an axial surface of each of the comb teeth.
In some technical schemes, the raw material kettle, the reaction separation kettle and the alkali liquor kettle are all provided with heating components for heating materials, so that the raw material liquid and the alkali liquor are isothermally mixed into the reaction separation kettle which maintains the temperature of the precipitated precipitate.
In some technical schemes, the device further comprises a byproduct salt recovery unit and a water purification unit which are sequentially connected to the liquid outlet of the hollow rotating shaft in series, wherein the byproduct salt recovery unit and the water purification unit adopt a nanofiltration membrane and/or a reverse osmosis membrane, and the device further comprises a dryer and a finished product packaging unit, wherein the dryer is sequentially connected to the discharge outlet at the bottom of the reaction separation kettle in series, and the finished product packaging unit is used for collecting iron phosphate.
In some technical schemes, a clear liquid outlet of the water purifying unit is connected back to the alkali liquor kettle and/or the reaction separation kettle for supplementing deionized water.
In some technical schemes, the top side of the reaction separation kettle is communicated with an exhaust pipeline, and the exhaust pipeline is communicated to a gas recovery unit.
In some technical schemes, a first metering pump for regulating and controlling the material flow and a first flowmeter for detecting the material flow are sequentially arranged on the first flow strand along the material conveying direction; and the second flow is sequentially provided with a second metering pump for regulating and controlling the material flow and a second flowmeter for detecting the material flow along the material conveying direction.
In some technical schemes, two parallel streams are communicated with the upstream of the raw material kettle, one stream is used for inputting ferrous raw materials into the raw material kettle, and the other stream is used for inputting phosphorus source raw materials into the raw material kettle; and the upstream of the alkali liquor kettle is communicated with a stream for inputting a soluble alkali source.
The utility model adopts the technical scheme and at least has the following beneficial effects:
1. the gas oxidant is adopted to replace the traditional solid or liquid chemical oxidant, so that the production cost of the iron phosphate is saved to a great extent on one hand, and the pollution problem caused by production and use of the chemical oxidant is avoided on the other hand;
2. the separation component is arranged in the reaction separation kettle in an integrated manner and used for dynamically filtering and washing iron phosphate particles generated by reaction, the separation component drives the hollow rotating shaft to drive the membrane to rotate by the motor, mother liquor and washing wastewater enter an internal interlayer gap through the surface of the membrane and are converged to an internal cavity of the hollow rotating shaft to be discharged to the outside of equipment under the pushing of internal pressure, suspension in the reaction separation kettle can be filtered in situ during and after the reaction is finished, wet materials after filtration can be washed in situ, the separation efficiency is greatly improved, meanwhile, the integration level of the device is high, and the occupied area is small;
3. meanwhile, the separation assembly is used as a gas distribution device of the gas oxidant, the micropore characteristic of the membrane material is fully utilized, the gas oxidant is introduced from the hollow rotating shaft, and gas is uniformly distributed from the inner cavity of the membrane to the surface of the membrane, so that the gas can be fully contacted with the liquid, the gas-liquid contact area is increased, and the gas-liquid mass transfer efficiency is improved;
4. in some preferred technical schemes of the scheme, the turbulence elements of the comb-shaped pipe fitting parallel to the hollow rotating shaft are adopted, so that on one hand, a turbulence effect can be formed between the membranes, the mixing of reactants is promoted, and the deposition of solid particles generated by reaction on the surfaces of the membranes is reduced; on the other hand, the reactor can be used as a liquid distributor to further improve the mixing effect of reactants and the gas-liquid mass transfer efficiency;
5. according to the method, through a series of engineering measures of uniform feeding among the turbulence element membranes, uniform gas distribution on the surfaces of the membranes, strong shearing and mixing of multiple membranes, in-situ discharge of clear liquid and in-situ washing of wet materials, all process conditions can be strictly controlled, product quality control is facilitated, and batch consistency and quality stability of products are kept.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings and the reference numerals thereof used in the embodiments are briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a gas-liquid synthesis apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the arrangement of the flow disturbing elements in the reaction separation tank according to the embodiment of the present invention.
The notations in the figures have the following meanings:
10-raw material kettle; 11-a first metering pump; 12-a first flow meter; 13-reaction separation kettle; 14-byproduct salt recovery unit; 15-a water purification unit; 16-an alkali liquor kettle; 17-a second metering pump; 18-a second flow meter; 19-a dryer; 20-finished product packaging unit; 21-a heating assembly; 22-a flow perturbation element; 23-an injection hole;
material stream label description:
1-ferrous raw material; 2-a phosphorus source raw material; 3-a gaseous oxidizing agent; 4-a soluble source of alkali; 5-byproduct salt; 6-waste liquid; 7-tap water.
Detailed Description
In order to make the technical features, objects and effects of the present invention more clearly understood, a detailed description of embodiments of the present invention will be given below with reference to the accompanying drawings.
It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "multi-stage, multi-layer" means at least two stages/layers, e.g., two stages/layers, three stages/layers, etc.; and the term "and/or" is intended to include any and all combinations of one or more of the associated listed items.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1, a gas-liquid synthesis apparatus for battery-grade iron phosphate is shown, which includes a reaction separation kettle 13, at least three parallel streams are communicated with the upstream of the reaction separation kettle 13, a first stream is led from a raw material kettle 10, a second stream is led from an alkali solution kettle 16, and a third stream is used for injecting washing water into the reaction separation kettle 13. Two parallel streams are communicated with the upstream of the raw material kettle 10, one stream is used for inputting a ferrous raw material 1 into the raw material kettle 10, and the other stream is used for inputting a phosphorus source raw material 2 into the raw material kettle 10; and the upstream of the alkali liquor kettle 16 is communicated with a stream for inputting the soluble alkali source 4.
In a preferred embodiment, the raw material tank 10, the reaction separation tank 13 and the alkali solution tank 16 are all provided with a heating element 21 for heating the materials, so that the raw material solution and the alkali solution are isothermally mixed in the reaction separation tank 13 which maintains the temperature for precipitation. Specifically, the heating assembly 21 may be a heating jacket disposed outside the wall of the corresponding container, and the heating jacket is filled with heating media such as steam for heating and heat preservation of the corresponding container; or may be a coiled heat exchanger disposed within the respective vessel for increasing the efficiency of heat transfer between the liquid and the heating medium.
It should be noted that the ferrous iron and the phosphorus source are added to the raw material kettle 10, dissolved in deionized water by stirring and heated and kept warm, or the prepared solutions are added to the raw material kettle 10 and mixed uniformly and heated and kept warm.
In another preferred embodiment, the first metering pump 11 for regulating the flow rate of the raw material and the first flow meter 12 for detecting the flow rate of the raw material are sequentially arranged in the raw material conveying direction of the first stream; the second metering pump 17 for regulating the flow rate of the alkali liquor and the second flowmeter 18 for detecting the flow rate of the alkali liquor are sequentially arranged along the conveying direction of the alkali liquor in the second stream, an electronic PH meter for detecting the PH value of the liquid is arranged in the reaction separation kettle 13, and an output signal of the electronic PH meter is fed back to the automatic control system to regulate the alkali output of the corresponding alkali liquor kettle 16, so that the pH value meeting the reaction requirement in the reaction separation kettle 13 is ensured. Wherein, the alkali liquor can be added into the reaction separation kettle 13 for a plurality of times for adjusting the pH value suitable for the reaction in the kettle at a proper time.
The reaction separation kettle 13 is provided with at least one group of separation components for dynamically filtering and washing iron phosphate particles generated by reaction, each separation component comprises a hollow rotating shaft which penetrates through the reaction separation kettle 13, a plurality of hollow membranes which are distributed on the hollow rotating shaft at intervals, the hollow rotating shaft is communicated with a gas oxidant inlet pipe, the hollow membranes are communicated with the hollow rotating shaft, membrane holes which can enable the gas oxidant 3 to be uniformly distributed on the surfaces of the membranes from inner cavities to surfaces of the membranes and enable liquid to penetrate through the surfaces to enter the inner cavities are distributed on the surfaces of the membranes, the hollow rotating shaft is provided with a liquid outlet which is used for discharging separated mother liquor clear liquid and washing wastewater, the liquid outlet is sequentially communicated with a byproduct salt recovery unit 14 and a water purification unit 15, specifically, a nanofiltration membrane is used for recovering byproduct salt 5, and a reverse osmosis membrane is used for purifying the wastewater, wherein a clear liquid outlet of the water purification unit 15 is connected to the kettle 16 and the reaction separation kettle 13 for supplementing deionized water, and the corresponding concentrated solution outlet is communicated to an environment-friendly workshop for treating the waste liquid 6, and the water purification unit 15 is also communicated with a stream for supplementing tap water 7.
In the embodiment, the gas oxidant 3 is adopted to replace the traditional solid or liquid chemical oxidant, so that the production cost of the iron phosphate is saved to a great extent on one hand, and the pollution problem caused by production and use of the chemical oxidant is avoided on the other hand; the gas oxidant 3 is introduced from the hollow rotating shaft, and gas is uniformly distributed from the inner cavity of the membrane to the surface of the membrane, so that the micropore characteristic of the membrane material is fully utilized, the gas can be fully contacted with the liquid, the gas-liquid contact area is increased, the gas-liquid mass transfer efficiency is improved, and when the gas oxidant is air, pure oxygen can be mixed into the air to improve the oxygen concentration and improve the pressure of a reaction system in order to improve the reaction rate; during and after the washing process, compressed gas is introduced through the hollow rotating shaft, so that the membrane can be subjected to back washing and back blowing, the materials on the surface of the membrane are blown off, and a back washing effect is achieved.
In this embodiment, the ferric phosphate granule that the separation module that an organic whole set up carries out dynamic filtration and washing to the reaction generation in through separation by reaction cauldron 13, separation module is rotatory by motor drive cavity pivot drive membrane, mother liquor and washing waste water permeate through the interior intermediate layer space that the membrane surface got into inside and assemble to the inside cavity discharge to the equipment outside of cavity pivot under the promotion of internal pressure, in the reaction process and after finishing, but suspension in separation by reaction cauldron 13 normal position filters, but the wet material normal position washing after the filtration, the device integrated level is high when separation efficiency promotes by a wide margin, area is little.
In a specific embodiment, the top side of the reaction separation kettle 13 is communicated with an exhaust pipeline, and the exhaust pipeline is communicated to a gas recovery unit and is used for collecting overflowed gas in the gas-liquid reaction process; the bottom side of the reaction separation kettle 13 is provided with a discharge port, which is communicated to a dryer 19 and a finished product packaging unit 20 for iron phosphate collection in sequence.
Referring to fig. 2, at least one set of flow disturbing elements 22 is disposed in the separation kettle 13 and parallel to the hollow shaft along the kettle wall, the flow disturbing elements 22 are comb-shaped tubes, each of which comprises a hollow comb back fixed to the kettle wall and a plurality of hollow comb teeth extending from the comb back to the space between adjacent membranes for enhancing gas-liquid mixing, the top end of the comb back is respectively communicated with the first stream and the second stream at the upstream of the separation kettle 13, each of the comb teeth is communicated with the comb back, and the outer peripheral surfaces of the comb teeth are provided with injection holes 23 for allowing the raw material liquid and the alkali liquid to penetrate through the surface and enter the kettle cavity. The turbulence element 22 in this embodiment can form a turbulence effect between the membranes, promote mixing of reactants, and reduce deposition of solid particles generated by the reaction on the surfaces of the membranes; on the other hand, the reactor can be used as a liquid distributor to further improve the mixing effect of reactants and the gas-liquid mass transfer efficiency.
It should be noted that the turbulence member 22 may include a plurality of groups of comb-shaped pipe members uniformly distributed at intervals to the inner circumference of the reaction separation kettle 13, or may be a circular ring formed by extending and enclosing the two sides of the comb back along the circumferential direction of the kettle wall. In order to further promote the mixing of gas-liquid phase reactants, spray holes 23 are uniformly distributed on the axial surface of each comb tooth, and during the reaction, the liquid reactants are uniformly distributed to the reaction space between the membranes through the spray holes 23 and are fully mixed with the gas oxidant 3 penetrating through the membrane holes to obtain the oxidizing liquid. When alkali liquor is added later, the alkali liquor is uniformly mixed with the oxidizing liquid in the reaction separation kettle 13 through the injection hole 23, so that the phenomenon of overhigh local concentration is avoided.
According to the method, through a series of engineering measures of uniform feeding among the membranes of the turbulence element 22, uniform gas distribution on the surfaces of the membranes, strong shearing and mixing of multiple membranes, in-situ discharge of clear liquid and in-situ washing of wet materials, all process conditions can be strictly controlled, product quality control is facilitated, and batch consistency and quality stability of products are kept.
For a clearer understanding of the gas-liquid synthesis apparatus for battery grade iron phosphate described in the embodiments of the present application, the following description will be made in detail:
s1: respectively preparing a ferrous solution and a phosphorus source solution, adding the ferrous solution and the phosphorus source solution into a raw material kettle 10 through parallel streams 1 and 2, uniformly mixing and preheating;
s2: preparing an alkali solution in an alkali solution kettle 16 and preheating;
s3: adding the mixed liquid in the raw material kettle 10 into the reaction separation kettle 13 through the turbulence element 22, starting the motor to drive the separation assembly to rotate, introducing the gas oxidant 3 through the hollow rotating shaft of the separation assembly, and uniformly distributing gas from the inner cavity of the membrane to the surface of the membrane to obtain an oxidizing liquid;
s4: the alkali liquor is added into the reaction separation kettle 13 for multiple times through the turbulence element 22, and the dropping times and the time interval of every two times of dropping are determined according to different conditions such as the concentration of the reaction liquid, the rotating speed of the diaphragm and the like;
s5: after the reaction is completed, separating the mother liquor by a separation component, and discharging the mother liquor into a byproduct salt recovery unit 14; adding washing water, washing the generated materials for multiple times, discharging washing wastewater to the water purification unit 15, recovering waste salt and wastewater by using a nanofiltration membrane and/or a reverse osmosis membrane in the byproduct salt recovery unit 14 and the water purification unit 15, and returning the wastewater after membrane treatment to a system as deionized water for recycling;
s6: and (4) after the subsequent drying treatment process, sending the materials which are washed and qualified into a finished product packaging unit for packaging, and then warehousing.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A gas-liquid synthesis device of battery-grade iron phosphate is characterized by comprising a reaction separation kettle, wherein the upstream of the reaction separation kettle is at least communicated with three parallel streams, the first stream is led out from a raw material kettle, the second stream is led out from an alkali liquor kettle, and the third stream is used for injecting washing water into the reaction separation kettle,
the separation device is characterized in that at least one group of separation components for dynamically filtering and washing iron phosphate particles generated by reaction are arranged in the reaction separation kettle, each separation component comprises a hollow rotating shaft and a plurality of hollow membranes, the hollow rotating shafts penetrate through the reaction separation kettle, the hollow rotating shafts are distributed on the hollow rotating shafts at intervals, the hollow rotating shafts are communicated with a gas oxidant inlet pipe, the hollow membranes are communicated with the hollow rotating shafts, membrane holes are distributed on the surfaces of the membranes, the gas oxidant can be uniformly distributed on the surfaces of the membranes from inner cavities, liquid can penetrate through the surfaces of the membranes to enter the inner cavities, and the hollow rotating shafts are provided with liquid discharge ports for discharging separated mother liquor and washing wastewater.
2. The gas-liquid synthesis device of battery grade iron phosphate as claimed in claim 1, wherein at least one set of flow disturbing elements is disposed in the reaction separation kettle and parallel to the hollow rotating shaft along the kettle wall,
the flow disturbing element is a comb-shaped pipe fitting and comprises an internal hollow comb back fixedly arranged on the kettle wall and a plurality of hollow comb teeth extending from the comb back to the space between adjacent membranes, the comb back is respectively communicated with the first stream and the second stream, each comb tooth is communicated with the comb back, and the peripheral surface of each comb tooth is provided with an injection hole which can enable raw material liquid and alkali liquor to penetrate through the surface and enter the cavity of the reaction separation kettle.
3. The gas-liquid synthesis device for battery grade iron phosphate according to claim 2, wherein a plurality of the flow disturbing elements are uniformly distributed at intervals to the inner peripheral side of the reaction separation kettle; or
The comb back is annular, so that the turbulence element is constructed into a ring shape.
4. The gas-liquid synthesis apparatus for battery-grade iron phosphate according to claim 2 or 3, wherein the injection holes are uniformly distributed to the axial surface of each comb tooth.
5. The gas-liquid synthesis device for battery-grade iron phosphate according to claim 1, wherein the raw material kettle, the reaction separation kettle and the alkali solution kettle are provided with heating components for heating materials, so that the raw material solution and the alkali solution are isothermally mixed in the reaction separation kettle which maintains the precipitation temperature.
6. The gas-liquid synthesis device of battery-grade iron phosphate according to claim 1, further comprising a byproduct salt recovery unit and a water purification unit connected in series to the liquid outlet of the hollow rotating shaft in sequence, wherein the byproduct salt recovery unit and the water purification unit employ a nanofiltration membrane and/or a reverse osmosis membrane, and
the device also comprises a dryer and a finished product packaging unit, wherein the dryer is sequentially connected to a discharge port at the bottom of the reaction separation kettle in series, and the finished product packaging unit is used for collecting the iron phosphate.
7. The gas-liquid synthesis device for battery grade iron phosphate according to claim 6, wherein the clear liquid outlet of the water purification unit is connected back to the lye tank and/or the reaction separation tank for supplementing deionized water.
8. The gas-liquid synthesis device for battery-grade iron phosphate according to claim 1, characterized in that the top side of the reaction separation kettle is communicated with an exhaust pipeline, and the exhaust pipeline is communicated with a gas recovery unit.
9. The gas-liquid synthesis device of battery-grade iron phosphate according to claim 1, characterized in that a first metering pump for regulating and controlling the material flow and a first flow meter for detecting the material flow are sequentially arranged along the material conveying direction of the first flow strand;
and the second flow is sequentially provided with a second metering pump for regulating and controlling the material flow and a second flowmeter for detecting the material flow along the material conveying direction.
10. The gas-liquid synthesis plant for battery-grade iron phosphate according to claim 1, wherein the feed kettle is connected upstream with two parallel streams, one for feeding ferrous raw material into the feed kettle and the other for feeding phosphorus source raw material into the feed kettle; and the upstream of the alkali liquor kettle is communicated with a stream for inputting a soluble alkali source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123050616.4U CN216396365U (en) | 2021-12-07 | 2021-12-07 | Gas-liquid synthesis device of battery-grade iron phosphate |
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| CN202123050616.4U CN216396365U (en) | 2021-12-07 | 2021-12-07 | Gas-liquid synthesis device of battery-grade iron phosphate |
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| CN216396365U true CN216396365U (en) | 2022-04-29 |
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