CN210457481U - Preparation system for calcium hydrophosphate - Google Patents
Preparation system for calcium hydrophosphate Download PDFInfo
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- CN210457481U CN210457481U CN201921242506.8U CN201921242506U CN210457481U CN 210457481 U CN210457481 U CN 210457481U CN 201921242506 U CN201921242506 U CN 201921242506U CN 210457481 U CN210457481 U CN 210457481U
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Abstract
The utility model relates to a preparation system for calcium hydrogen phosphate, including reation kettle, liquid feeding device, first feeding device, second feeding device, pressure filter and valve unit. Through setting up foretell preparation system for calcium hydrogen phosphate, put in powdered calcium carbonate and powdered calcium hydroxide to first feeding device and second feeding device respectively, then carry the phosphoric acid waste liquid and the calcium carbonate of homogeneity to reation kettle simultaneously through liquid feeding device and first feeding device in, after the calcium carbonate reaction, carry calcium hydroxide to reation kettle in through second feeding device and react, carry the filter-pressing to handle to the pressure filter with the material that produces after the reaction in the reation kettle at last. Only need put in powdered calcium carbonate and powdered calcium hydroxide in advance to the device that corresponds in, need not the manual work during follow-up production and put in, but directly carry to reation kettle by feeding device in, can not produce a large amount of dust during production, just can not influence operating personnel's health yet.
Description
Technical Field
The utility model relates to a chemical production equipment technical field especially relates to a preparation system for calcium hydrogen phosphate.
Background
The manufacture process of the thin film transistor liquid crystal display device is mainly to plate a layer of metal thin film on the surface of glass, and then to etch the position without photoresist covering and protection by acid etching liquid according to the circuit design requirement. The highest content of phosphoric acid in the acidic medium of the acidic etching solution is phosphoric acid, so the waste phosphoric acid etching solution is a strong acidic waste solution which is generated in a large amount in the manufacturing process of a thin film transistor liquid crystal display device. The waste phosphoric acid etching solution is usually treated by sequentially adding powdered calcium carbonate and powdered calcium hydroxide into the waste phosphoric acid etching solution to react, so as to convert phosphoric acid in the waste phosphoric acid etching solution into calcium hydrogen phosphate. However, in the conventional treatment method, powdery calcium carbonate and powdery calcium hydroxide are sequentially added into the waste phosphoric acid etching solution by hand, so that more dust is generated during the reaction, and the health of operators is affected.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a preparation system for calcium hydrogen phosphate, which does not need to manually and sequentially put two substances into the waste phosphoric acid etching solution to avoid affecting the health of operators, aiming at the problem that the existing treatment mode of the waste phosphoric acid etching solution can affect the health of operators.
A system for the production of dibasic calcium phosphate, comprising:
a reaction kettle;
the output port of the liquid adding device is communicated with the reaction kettle and is used for conveying reaction liquid into the reaction kettle;
the output port of the first feeding device is communicated with the reaction kettle and is used for conveying a first reactant into the reaction kettle;
the output port of the second feeding device is communicated with the reaction kettle and is used for conveying a second reactant into the reaction kettle;
the filter press is communicated with the output port of the reaction kettle; and
the control valve group is used for controlling the reaction kettle to be respectively communicated and disconnected with the liquid adding device, the first feeding device and the second feeding device;
wherein the preparation system comprises a first charging state and a second charging state;
when the preparation system is in the first charging state, the control valve group controls the reaction kettle to be respectively communicated with the liquid adding device and the first charging device and controls the reaction kettle to be disconnected with the second charging device;
when the preparation system is in the second feeding state, the control valve group controls the reaction kettle to be communicated with the second feeding device and controls the reaction kettle to be disconnected with the liquid adding device and the first feeding device respectively.
Through setting up foretell preparation system for calcium hydrogen phosphate, put into powdered calcium carbonate and powdered calcium hydroxide respectively to first feeding device and second feeding device, carry out the homogenate through the liquid feeding device to the phosphoric acid waste liquid and handle, then carry the phosphoric acid waste liquid and the calcium carbonate of homogeneity to reation kettle simultaneously, after the calcium carbonate reaction, carry the calcium hydroxide through second feeding device and react in carrying to reation kettle, carry the filter-pressing to the pressure filter to the material that produces after the reaction finishes in the reation kettle and handle, the filter residue that produces after the filter-pressing is handled is calcium hydrogen phosphate product.
So, only need put in powdered calcium carbonate and powdered calcium hydrate in advance to the device that corresponds, need not the manual work during follow-up production and put in, but directly carry to reation kettle by feeding device in, can not produce a large amount of dust during production, just can not influence operating personnel's health yet.
In one embodiment, the set of control valves includes a first control valve, a second control valve, and a third control valve;
the first control valve is arranged between the liquid adding device and the reaction kettle, the second control valve is arranged between the first feeding device and the reaction kettle, and the third control valve is arranged between the second feeding device and the reaction kettle.
In one embodiment, the preparation system further comprises a drying and dust removing device, and the input port of the drying and dust removing device is communicated with the filter residue discharge port of the filter press.
In one embodiment, the liquid adding device comprises a homogenizing tank, and a delivery pump, a circulation pipeline and a liquid storage tank which are arranged in the homogenizing tank, wherein the homogenizing tank is used for storing the reaction liquid, the delivery pump comprises two output ports, the two output ports of the delivery pump are respectively communicated with one end of the circulation pipeline and the input port of the liquid storage tank, the other end, far away from the delivery pump, of the circulation pipeline is arranged in the homogenizing tank, and the output port of the liquid storage tank is communicated with the input port of the reaction kettle;
the delivery pump comprises a circulation state and a delivery state;
when the delivery pump is in the circulation state, the delivery pump is used for pumping the reaction liquid in the homogenizing tank and delivering the reaction liquid to the circulation pipeline;
and when the delivery pump is in the delivery state, the delivery pump is used for pumping the reaction liquid in the homogenizing tank and delivering the reaction liquid to the liquid storage tank.
In one embodiment, the reaction vessel further comprises a steam input port, and the preparation system further comprises a steam engine, wherein an output port of the steam engine is communicated with the steam input port.
In one embodiment, the preparation system further comprises a thermometer, the reaction kettle is further provided with a temperature test port, and the thermometer is used for penetrating through the temperature test port and extending into the reaction kettle.
In one embodiment, the preparation system further comprises a pH meter, and the reaction kettle is further provided with a pH test port, and the pH meter is used for penetrating through the pH test port and extending into the reaction kettle.
In one embodiment, the first feeding device comprises a first storage bin, a first conveyor, a first batching tank and a first thick slurry pump;
the bin outlet of first feed bin corresponds the feed end setting of first conveyer, the discharge end of first conveyer corresponds first proportioning bins sets up, the input port of first thick liquid pump with the delivery outlet intercommunication of first proportioning bins, the delivery outlet of first thick liquid pump with reation kettle's input port intercommunication.
In one embodiment, the second feeding device comprises a second storage bin, a second conveyor, a second proportioning tank and a second thick slurry pump;
the bin outlet of second feed bin corresponds the feed end setting of second conveyer, the discharge end of second conveyer corresponds the second proportioning bins sets up, the input port of second thick liquid pump with the delivery outlet intercommunication of second proportioning bins, the delivery outlet of second thick liquid pump with reation kettle's input port intercommunication.
In one embodiment, the preparation system further comprises a circulating device, the circulating device comprises a filtrate tank and a circulating pump, the filtrate tank is communicated with a filtrate output port of the filter press, an input port of the circulating pump is communicated with an output port of the filtrate tank, and an output port of the circulating pump is respectively communicated with the first feeding device and the second feeding device.
Drawings
Fig. 1 is a schematic structural diagram of a system for preparing calcium hydrogen phosphate according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
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 invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
In order to facilitate understanding of the technical solution of the present invention, the treatment method of the existing waste phosphoric acid etching solution (i.e. phosphoric acid waste liquid) is briefly described here: at present, powdered calcium carbonate and powdered calcium hydroxide are usually added into phosphoric acid waste liquid in sequence, and the powdered calcium carbonate and the powdered calcium hydroxide are continuously added during reaction, namely, an operator is required to keep beside a reaction device for operation. Because powdery calcium carbonate and powdery calcium hydroxide granule are less, put in the in-process, lead to the amount of dust in the workshop to exceed standard easily, and operating personnel need keep on the scene and observe the reaction condition, so can influence operating personnel's in the workshop health.
As shown in fig. 1, a system 10 for preparing calcium hydrogen phosphate according to an embodiment of the present invention includes a reaction kettle 12, a liquid adding device 14, a first feeding device 16, a second feeding device 18, a filter press 19, and a control valve set (not shown).
The output port of the liquid adding device 14 is communicated with the reaction kettle 12 and is used for conveying reaction liquid into the reaction kettle 12.
The output port of the first feeding device 16 is communicated with the reaction kettle 12 and is used for conveying a first reactant into the reaction kettle 12; the output port of the second feeding device 18 is connected to the reaction vessel 12, and is used for delivering a second reactant into the reaction vessel 12.
The filter press 19 is communicated with an output port of the reaction kettle 12 and is used for carrying out filter pressing treatment on the substances in the reaction kettle 12.
The control valve group is used for controlling the connection and disconnection between the reaction kettle and the liquid adding device 14, the first feeding device 16 and the second feeding device 18 respectively.
Wherein, the preparation system comprises a first feeding state and a second feeding state.
When the preparation system is in a first charging state, the control valve group controls the reaction kettle 12 to be communicated with the liquid adding device 14 and the first charging device 16, and controls the reaction kettle 12 to be disconnected with the second charging device 18;
when the preparation system is in the second charging state, the control valve set controls the reaction kettle 12 to be communicated with the second charging device 18, and controls the reaction kettle 12 to be disconnected from the liquid charging device 14 and the first charging device 16.
In one embodiment, the reaction solution may be a phosphoric acid waste solution, the first reactant may be powdered calcium carbonate, and the second reactant may be powdered calcium hydroxide.
Through setting up foretell preparation system for calcium hydrogen phosphate, put into powdered calcium carbonate and powdered calcium hydroxide respectively to first feeding device 16 and second feeding device 18, carry phosphoric acid waste liquid and calcium carbonate to reation kettle 12 simultaneously through liquid feeding device 14 and first feeding device 16 in, after the calcium carbonate reaction, carry calcium hydroxide to reation kettle 12 in through second feeding device 18 and react, carry the filter-pressing to pressure filter 19 with the material that produces after the reation kettle 12 interior reaction finishes at last and handle, the filter residue that produces after 19 filter-pressing of pressure filter is the calcium hydrogen phosphate product.
So, only need put in powdered calcium carbonate and powdered calcium hydroxide in advance to the device that corresponds in, need not the manual work during follow-up production and put in proper order, but directly carry to reation kettle 12 in by feeding device, can not produce a large amount of dust during production, just can not influence operating personnel's health yet.
It should be noted that the replenishment of the material in the charging device can be performed before the production, and dust may be generated when the powdery material is put in, but the material putting before the production does not need to be long, and the operator can leave the workshop after the putting is finished and then enter the workshop to operate after the dust disappears.
In some embodiments, the liquid adding device 14 includes a homogenizing tank 142, and a delivery pump and a circulation pipeline disposed in the homogenizing tank 142, the homogenizing tank 142 is used for storing the phosphoric acid waste liquid, the delivery pump includes two output ports, one of the output ports of the delivery pump is communicated with one end of the circulation pipeline, and the other end of the circulation pipeline, which is far away from the delivery pump, is disposed in the homogenizing tank 142.
Further, the liquid adding device 14 further comprises a liquid storage tank 144, another output port of the delivery pump is communicated with an input port of the liquid storage tank 144, and an output port of the liquid storage tank 144 is communicated with an input port of the reaction kettle 12. Specifically, the delivery pump is a centrifugal pump which is compact in structure, is used for slightly corrosive liquid, and is uniform in flow and stable in operation.
When the delivery pump is in the circulating state, the delivery pump is used for extracting the phosphoric acid waste liquid in the homogenizing tank 142 and delivering the phosphoric acid waste liquid to the circulating pipeline; when the transfer pump is in a transfer state, the transfer pump is used for pumping the phosphoric acid waste liquid in the homogenizing tank 142 and transferring the phosphoric acid waste liquid into the liquid storage tank 144.
Thus, the collected phosphoric acid waste liquid is input into the homogenizing tank 142, the phosphoric acid waste liquid collected at the beginning is not homogenized, the conveying pump is started to be in a circulating state, the conveying pump pumps the phosphoric acid waste liquid in the homogenizing tank 142 and conveys the phosphoric acid waste liquid into the circulating pipeline, and the other end of the circulating pipeline, which is far away from the conveying pump, is also positioned in the homogenizing tank 142, so that the conveying pump is equivalent to be used for stirring the phosphoric acid waste liquid in the homogenizing tank 142 to convert the phosphoric acid waste liquid, which is originally not homogenized in the homogenizing tank 142, into a homogenized state, and then the phosphoric acid waste liquid converted into the homogenized state is conveyed to the liquid storage tank 144 through the conveying pump and is temporarily stored.
It should be noted that the two states of the delivery pump are actually that the delivery pump outputs the extracted phosphoric acid waste liquid through two output ports respectively, and the two output ports are respectively communicated with the circulation pipeline and the input port of the liquid storage tank 144, and the two output ports can be sequentially communicated with the input port of the delivery pump through the control valve in the delivery pump.
In addition, another output port of the transfer pump, which is in communication with the input port of the reservoir 144, may be in communication with the input port of the reservoir 144 via a connecting pipe, since the solution is being transferred. Of course, the solution in the preparation system can be conveyed through the connecting pipeline, the connecting pipeline for conveying is only required to be ensured to be resistant to phosphoric acid corrosion, and the solid matter can be conveyed through a conveying belt or a conveying chain plate and other devices.
In some embodiments, the control valve set includes a first control valve, a second control valve and a third control valve, the first control valve is disposed between the liquid adding device 14 and the reaction kettle 12, the second control valve is disposed between the first feeding device 16 and the reaction kettle 12, and the third control valve is disposed between the second feeding device 18 and the reaction kettle 12, and is used for controlling the connection and disconnection between the reaction kettle 12 and the liquid adding device 14, the first feeding device 16 and the second feeding device 18, respectively.
It is understood that three control valves may be provided at the input port of the reaction vessel 12, or at the output ports of the liquid adding device 14 and the two feeding devices, as long as the opening of the input port or the output port can be adjusted by the control valves, thereby adjusting the speed of delivering the material to the reaction vessel 12. Of course, controlling the opening degree also enables connection and disconnection of the two devices.
In some embodiments, reaction vessel 12 further comprises a steam input, and the preparation system further comprises a steam engine (not shown), the output of the steam engine being in communication with the steam input. So, through pouring into steam in reation kettle 12 and improve the temperature in reation kettle 12, and the pouring into through control steam then can be so that the temperature control in reation kettle 12 is in certain extent to guarantee that reaction temperature is stable.
Further, the preparation system still includes the thermometer, and reation kettle 12 still is equipped with the temperature test mouth, and the thermometer is used for wearing to establish the temperature test mouth and stretch into reation kettle 12 in to obtain the temperature in reation kettle 12, and visually show this temperature and give operating personnel, thereby make things convenient for operating personnel to control the input of steam according to this temperature. Of course, the operator may control the opening by setting valves in the steam engine and the reaction kettle 12.
In some embodiments, the preparation system further includes a pH meter, the reaction kettle 12 is further provided with a pH test port, the pH meter is used for penetrating through the pH test port and extending into the reaction kettle 12 to obtain the pH value of the reaction substance in the reaction kettle 12, and an operator can adjust the opening degrees of the second control valve and the third control valve according to the obtained pH value, so as to adjust the adding amounts of the reaction substance by the first feeding device 16 and the second feeding device 18, thereby realizing the pH value of the reaction substance in the reaction kettle 12.
In some embodiments, the first feeding device 16 includes a first bin 162, a first conveyor (not shown), and a first batching tank 164, wherein the first bin 162 is used for storing powdered calcium carbonate, a discharge port of the first bin 162 is disposed corresponding to a feeding end of the first conveyor, and a discharge end of the first conveyor is disposed corresponding to the first batching tank 164.
Like this, the operator drops powdered calcium carbonate into first feed bin 162, and powdered calcium carbonate in first feed bin 162 can be deposited temporarily, when needs use, discharges the powdered calcium carbonate in first feed bin 162 to the feed end of first conveyer, carries the powdered calcium carbonate of preset volume to first batching groove 164 through first conveyer, then adds water to first batching groove 164, and stirs, stirs powdered calcium carbonate to calcium carbonate thick liquid.
Further, the first feeding device 16 further comprises a first metering device (not shown) disposed in the first bin 162 for metering the amount of the powdery calcium carbonate in the first bin 162. In practical application, an electric bin door is arranged at the discharge opening of the first bin 162 and electrically connected with the first meter.
In this way, the amount of the powdery calcium carbonate discharged from the first hopper 162 can be obtained by the first meter, i.e., the discharged weight is subtracted from the initial weight, and when the discharged amount reaches the preset weight, the electric hopper door is closed. Certainly, the control aspect can be controlled through setting up a controller, and concrete control mode is not repeated, as long as can realize when the volume of discharging powdered calcium carbonate reaches and predetermines when weighing, electronic bin gate is closed.
Specifically, the first conveyor is a conveyor belt, the feeding end of the conveyor belt is arranged corresponding to the discharge opening of the first bin 162 to ensure that the powdery calcium carbonate discharged from the first bin 162 can fall on the feeding end of the conveyor belt, and the discharging end of the conveyor belt is arranged corresponding to the first dosage tank 164 to discharge the powdery calcium carbonate on the conveyor belt into the first dosage tank 164.
In some embodiments, the first feeding device 16 further comprises a first slurry pump 166, an input port of the first slurry pump 166 is communicated with an output port of the first dispensing tank 164, and an output port of the first slurry pump 166 is communicated with an input port of the reaction tank 12, so that the stirred and formed calcium carbonate slurry is pumped into the reaction tank 12 through the first slurry pump 166.
In some embodiments, the second feeding device 18 comprises a second bin 182, a second conveyor (not shown), and a second dosage tank 184, wherein the second bin 182 is used for storing powdered calcium hydroxide, a discharge port of the second bin 182 is disposed corresponding to a feeding end of the second conveyor, and a discharge end of the second conveyor is disposed corresponding to the second dosage tank 184.
Further, the second feeding device 18 further comprises a second metering device (not shown) disposed in the second storage bin 182 for metering the amount of the powdery calcium hydroxide in the second storage bin 182. Specifically, an electric bin gate is arranged at the discharge outlet of the second bin 182, and the electric bin gate is electrically connected with the second meter.
In some embodiments, the second feeding device 18 further comprises a second slurry pump 186, an input port of the second slurry pump 186 is communicated with an output port of the second dosing tank 184, and an output port of the second slurry pump 186 is communicated with an input port of the reaction kettle 12, so that the stirred and formed calcium hydroxide slurry is pumped into the reaction kettle 12 through the second slurry pump 186.
It will be appreciated that the operation and control of the second feeding device 18 is substantially the same as the first feeding device 16, and that the control of both devices can be controlled by the same controller, except that the second feeding device 18 is used to convert the powdered calcium bicarbonate into a thick slurry of calcium bicarbonate and pump the thick slurry of calcium bicarbonate into the reaction tank 12.
In addition, the first feeding device 16 and the second feeding device 18 may be of a totally enclosed design during operation, that is, not communicated with the reaction kettle 12 during operation, but not communicated with the outside, so as to further avoid dust generation in the workshop. Of course, the first and second bins 162 and 182 can be opened to fill the material by opening the corresponding filling ports, or the whole device can be detached when maintenance is needed.
In some embodiments, the preparation system further comprises a dry dust removal device 11, and the input port of the dry dust removal device 11 is communicated with the residue discharge port of the filter press 19. Further, the drying and dust removing device 11 comprises a feeder and a dryer, wherein the feeder introduces and conveys the filter residue into the dryer for drying treatment.
In practical application, the drying and dust removing device 11 further comprises a cyclone dust remover and a bag dust remover, wherein an input port of the cyclone dust remover is communicated with an output port of the dryer and used for removing larger dust particles of filter residues subjected to drying treatment, an output port of the cyclone dust remover is communicated with an input port of the bag dust remover, the bag dust remover is used for removing smaller dust particles in the filter residues, and a feed-grade calcium hydrogen phosphate product can be obtained after dust removal treatment. Specifically, the drying and dust removing device 11 further comprises an induced draft fan, and the induced draft fan can be used for providing wind power for dust removal.
In some embodiments, the preparation system further comprises a circulation device 13, the circulation device 13 comprises a filtrate tank 132 and a circulation pump 134, the filtrate tank 132 is communicated with the filtrate outlet of the filter press 19, the input port of the circulation pump 134 is communicated with the output port of the filtrate tank 132, and the output port of the circulation pump 134 is communicated with the first feeding device 16 and the second feeding device 18 respectively. Therefore, the filtrate is reused, and resources are saved.
In order to facilitate understanding of the technical scheme of the present invention, a certain description is made herein on the general workflow of the preparation system by materials:
homogenizing phosphoric acid waste liquid: inputting the collected phosphoric acid waste liquid into a homogenizing tank 142, homogenizing the phosphoric acid waste liquid through a conveying pump and a circulating pipeline to obtain homogenized phosphoric acid waste liquid, and conveying the homogenized phosphoric acid waste liquid into a liquid storage tank 144 through the conveying pump for temporary storage;
calcium carbonate thick slurry: after the operator puts the powdered calcium carbonate into the first bin 162, discharging the powdered calcium carbonate with a preset weight in the first bin 162 to the feeding end of the first conveyor, and conveying the powdered calcium carbonate with the preset weight to the first batching tank 164 by the first conveyor so as to mix and stir the powdered calcium carbonate and the water in the first batching tank 164 until calcium carbonate thick slurry is formed;
calcium hydroxide thick paste: after the operator puts the powdered calcium hydroxide into the second bin 182, the powdered calcium hydroxide with the preset weight in the second bin 182 is discharged to the feeding end of the second conveyor, and the second conveyor conveys the powdered calcium hydroxide with the preset weight to the second batching tank 184, so that the powdered calcium hydroxide and the water are mixed and stirred in the second batching tank 184 until calcium hydroxide thick slurry is formed;
calcium hydrogen phosphate: firstly, enabling a preparation system to be in a first feeding state, simultaneously inputting phosphoric acid waste liquid and calcium carbonate thick slurry into a reaction kettle 12, pouring steam into the reaction kettle 12 in the input process to ensure the reaction temperature, simultaneously observing the pH value of a reaction substance through a pH meter, stopping material input after reaching a preset pH range, then enabling the preparation system to be in a second feeding state, conveying the calcium hydroxide thick slurry into the reaction kettle 12, observing the pH value of the reaction substance through the pH meter in the input process, and stopping material input when the pH value reaches a target value;
after the reaction is finished, the substances in the reaction kettle 12 are conveyed to a filter press 19 for filter pressing treatment, filter residues obtained by filter pressing are conveyed to a drying and dust removing device 11 for drying and dust removal, and finally calcium hydrogen phosphate is obtained.
It is understood that although a preset amount (preset weight) of calcium carbonate (calcium bicarbonate) can be added to the sizing device, the preset amount is actually required to ensure that the phosphoric acid in the phosphoric acid waste liquid can be exhausted due to the poor acquisition of the phosphoric acid amount in the phosphoric acid waste liquid, that is, the preset amount is sufficient, and the situation that the added calcium carbonate (calcium hydroxide) is excessive can be avoided by measuring the pH value.
In practical application, the preparation system further comprises a controller, and the controller is electrically connected with the liquid adding device 14, the first feeding device 16, the second feeding device 18, the control valve group, the drying and dust removing device 11 and the circulating device 13, that is, the work flow can be controlled by the controller, and the control mode can be selected according to practical situations as long as the flow can be realized.
Compared with the prior art, the utility model provides a preparation system for calcium hydrogen phosphate has following advantage at least:
1) a large amount of dust is not generated during production, and the health of operators is not influenced;
2) calcium carbonate and calcium hydroxide can be added after being weighed by a meter, so that the method is more accurate and avoids waste;
3) the circulating device can recycle the filtrate, thereby saving resources.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A preparation system for calcium hydrogen phosphate is characterized by comprising the following components:
a reaction kettle;
the output port of the liquid adding device is communicated with the reaction kettle and is used for conveying reaction liquid into the reaction kettle;
the output port of the first feeding device is communicated with the reaction kettle and is used for conveying a first reactant into the reaction kettle;
the output port of the second feeding device is communicated with the reaction kettle and is used for conveying a second reactant into the reaction kettle;
the filter press is communicated with the output port of the reaction kettle; and
the control valve group is used for controlling the reaction kettle to be respectively communicated and disconnected with the liquid adding device, the first feeding device and the second feeding device;
wherein the preparation system comprises a first charging state and a second charging state;
when the preparation system is in the first charging state, the control valve group controls the reaction kettle to be respectively communicated with the liquid adding device and the first charging device and controls the reaction kettle to be disconnected with the second charging device;
when the preparation system is in the second feeding state, the control valve group controls the reaction kettle to be communicated with the second feeding device and controls the reaction kettle to be disconnected with the liquid adding device and the first feeding device respectively.
2. A system for the preparation of dibasic calcium phosphate according to claim 1, wherein said set of control valves comprises a first control valve, a second control valve and a third control valve;
the first control valve is arranged between the liquid adding device and the reaction kettle, the second control valve is arranged between the first feeding device and the reaction kettle, and the third control valve is arranged between the second feeding device and the reaction kettle.
3. A system for the preparation of dibasic calcium phosphate according to claim 1, further comprising a dry dedusting apparatus, the input port of which is in communication with the residue discharge port of the filter press.
4. The system for preparing calcium hydrogen phosphate according to claim 1, wherein said liquid adding device comprises a homogenizing tank, a delivery pump, a circulation pipe and a liquid storage tank, said delivery pump, said circulation pipe and said liquid storage tank are arranged in said homogenizing tank, said homogenizing tank is used for storing said reaction liquid, said delivery pump comprises two output ports, and said two output ports of said delivery pump are respectively communicated with one end of said circulation pipe and said input port of said liquid storage tank, said circulation pipe is arranged in said homogenizing tank at the other end far from said delivery pump, said output port of said liquid storage tank is communicated with said input port of said reaction kettle;
the delivery pump comprises a circulation state and a delivery state;
when the delivery pump is in the circulation state, the delivery pump is used for pumping the reaction liquid in the homogenizing tank and delivering the reaction liquid to the circulation pipeline;
and when the delivery pump is in the delivery state, the delivery pump is used for pumping the reaction liquid in the homogenizing tank and delivering the reaction liquid to the liquid storage tank.
5. A system for the production of dibasic calcium phosphate according to claim 1, wherein the reaction vessel further comprises a steam inlet, the system further comprising a steam engine, an output of the steam engine being in communication with the steam inlet.
6. A system for the preparation of dibasic calcium phosphate according to claim 5, further comprising a thermometer, wherein said reaction vessel is further provided with a temperature test port, and said thermometer is used for penetrating said temperature test port and extending into said reaction vessel.
7. A system for the preparation of dibasic calcium phosphate according to claim 1, further comprising a pH meter, wherein said reaction vessel is further provided with a pH test port, and said pH meter is used for penetrating said pH test port and extending into said reaction vessel.
8. A system for the preparation of dibasic calcium phosphate according to claim 1, wherein the first feeding device comprises a first bunker, a first conveyor, a first batching tank and a first thick slurry pump;
the bin outlet of first feed bin corresponds the feed end setting of first conveyer, the discharge end of first conveyer corresponds first proportioning bins sets up, the input port of first thick liquid pump with the delivery outlet intercommunication of first proportioning bins, the delivery outlet of first thick liquid pump with reation kettle's input port intercommunication.
9. A system for the production of dibasic calcium phosphate according to claim 1, wherein the second feeding device comprises a second bunker, a second conveyor, a second batching tank and a second thick slurry pump;
the bin outlet of second feed bin corresponds the feed end setting of second conveyer, the discharge end of second conveyer corresponds the second proportioning bins sets up, the input port of second thick liquid pump with the delivery outlet intercommunication of second proportioning bins, the delivery outlet of second thick liquid pump with reation kettle's input port intercommunication.
10. A system for the preparation of dibasic calcium phosphate according to claim 1, further comprising a circulating device, said circulating device comprising a filtrate tank and a circulating pump, said filtrate tank being in communication with a filtrate outlet of said filter press, an input of said circulating pump being in communication with an output of said filtrate tank, an output of said circulating pump being in communication with said first feeding device and said second feeding device, respectively.
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| CN201921242506.8U CN210457481U (en) | 2019-07-30 | 2019-07-30 | Preparation system for calcium hydrophosphate |
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| CN201921242506.8U CN210457481U (en) | 2019-07-30 | 2019-07-30 | Preparation system for calcium hydrophosphate |
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