CN211445064U - Processing apparatus of potassium dihydrogen phosphate crystallization mother liquor - Google Patents
Processing apparatus of potassium dihydrogen phosphate crystallization mother liquor Download PDFInfo
- Publication number
- CN211445064U CN211445064U CN201922472208.4U CN201922472208U CN211445064U CN 211445064 U CN211445064 U CN 211445064U CN 201922472208 U CN201922472208 U CN 201922472208U CN 211445064 U CN211445064 U CN 211445064U
- Authority
- CN
- China
- Prior art keywords
- mother liquor
- crystallization
- dihydrogen phosphate
- potassium dihydrogen
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model particularly relates to a processing apparatus of potassium dihydrogen phosphate crystallization mother liquor, pipeline and pipeline valve between mother liquor storage tank, solvent storage tank, crystallizer, solid-liquid separation equipment, drying device, distillation plant and each equipment. The utility model discloses processing apparatus utilizes potassium dihydrogen phosphate to dissolve out the crystallization in the nature of the insoluble solvent of potassium dihydrogen phosphate with remaining product in the potassium dihydrogen phosphate crystallization mother liquor to shift out the foreign matter solution and generate the system, avoided the impurity accumulation, also ensured product quality and yield.
Description
Technical Field
The utility model relates to a technical field is handled to the mother liquor, specifically indicates a processing apparatus of potassium dihydrogen phosphate crystallization mother liquor.
Background
Potassium dihydrogen phosphate (KH)2PO4) Is an orthorhombic crystal with white color band luster, is easy to dissolve in water, is acidic in aqueous solution, is insoluble in ethanol, and has certain deliquescence. The potassium dihydrogen phosphate has wide application in the fields of industry, medicine, food and agriculture.
At present, potassium dihydrogen phosphate products are prepared by a plurality of methods, and production raw materials often contain considerable impurities in the production process, most of the impurities are removed in the conventional impurity removal process of reaction, but some relatively trace impurities (mainly Al) still remain3+、Mg2+、Ca2+Plasma metal ions). The residual impurities probably do not have great influence on the product quality in the early crystallization separation because of trace amount, but the residual impurities are gradually accumulated along with the continuous production, and a great amount of impurities are separated out along with the crystallization of the product after the impurities are accumulated to a certain amount, so that the product quality is unqualified. However, if the crystallization mother liquor is discarded only because of containing a small amount of impurities, the product yield is greatly reduced, and the resource is greatly wasted. The crystallization mother liquor needs to be subjected to certain impurity removal treatment if the crystallization mother liquor is returned to a system for cyclic utilization, potassium hydroxide is generally adopted for neutralization and impurity removal in the industry at present, the operation is complex, impurities cannot be removed completely, and the production cost can be greatly improved.
Disclosure of Invention
The utility model aims at providing a processing apparatus of monopotassium phosphate crystallization mother liquor, the device can handle the crystallization mother liquor, retrieves surplus product wherein, retrieves the solvent back of separating, can directly shift out production system with the solution that contains impurity to eliminate the accumulation of impurity in process of production completely, can guarantee product quality like this and can guarantee the product yield again. And the device has simple structure, convenient operation and lower construction cost.
The utility model discloses a solve above-mentioned problem, the technical scheme who adopts is: a treatment device for monopotassium phosphate crystallization mother liquor specifically comprises a mother liquor storage tank, a dissolving agent storage tank, a crystallization tank, a solid-liquid separation device, a drying device, a distillation device, a pipeline and a pipeline valve;
the feed inlet of the mother liquid storage tank is connected with a liquid discharge port of a crystallization solid-liquid separation device in potassium dihydrogen phosphate production, a discharge port of the mother liquid storage tank is connected with a feed inlet of a crystallization tank, another feed inlet of the crystallization tank is connected with a discharge port of a elutriating agent storage tank, a discharge port of the crystallization tank is connected with the solid-liquid separation device, a solid outlet of the solid-liquid separation device is connected with a drying device, a discharge port of the solid-liquid separation device is connected with a feed inlet of a distillation device, and a discharge port of the distillation device is connected with a feed inlet of.
Further, the mother liquor reservoir is a reservoir with a jacket and a stirring device.
Further, the crystallization tank is a reaction tank with a jacket and a stirring device, and the bottom of the crystallization tank is conical.
Further, the stirring device is a paddle stirrer, a propeller stirrer, a turbine stirrer or an anchor stirrer. Preferably, the stirring device of the mother liquor storage tank is a propeller stirrer and is used for storing the crystallization mother liquor obtained after primary crystallization and filtration in production, hot water is introduced into the jacket for heat preservation, and the propeller stirrer can ensure that the mother liquor in the storage tank is completely mixed and has consistent temperature, so that the mother liquor cannot be cooled in the storage tank to separate out products.
In another preferred scheme, the stirring device of the crystallization tank is a paddle stirrer, the bottom of the stirring device is conical, and the stirring speed is controlled to ensure that the mother liquor and the elution liquid are uniformly mixed and no vortex is generated to bring up the elution crystallization product, so that the elution product can be settled at the conical bottom of the crystallization tank, and subsequent filtration and separation are facilitated. Meanwhile, in order to increase the product yield, cold water can be connected into the jacket, so that the solubility of the product in the solvent is reduced.
Further, the solid-liquid separation device is a centrifugal separator or a sand layer filter or a settling tank or a vacuum suction filter or a filter press. Preferably a centrifuge or a filter press.
Further, the drying device is a horizontal boiling dryer or a hot air tower dryer or a fluidized bed dryer or a spray dryer or a rotary drum and belt type sample dryer. Preferably a hot air tower dryer.
Further, the distillation apparatus is a plate distillation column or a packed distillation column. The plate distillation tower is preferred, so that the added elution agent in the elution crystallization process can be separated and recovered better.
Further, the discharge hole of the mother liquid storage tank is connected with the feed inlet of the crystallization tank through a pipeline with a pump.
Further, the discharge hole of the solvent storage tank is connected with the feed inlet of the crystallization tank through a pipeline with a pump.
Further, a discharge port of the solid-liquid separation device is connected with a feed port of the distillation device through a pipeline with a pump.
The utility model has the advantages that: the solvent capable of being recycled is used for dissolving out and crystallizing the residual product in the crystallization mother liquor generated in the process of generating the monopotassium phosphate, and the impurity solution is removed out of the production system, so that the accumulation of impurities can be effectively avoided, and the quality and the yield of the product can be ensured.
Description of the drawings:
FIG. 1 is a device for treating a mother liquor of monopotassium phosphate crystallization.
In the figure, a mother liquor storage tank 1, a solvent storage tank 2, a crystallization tank 3, a solid-liquid separation device 4, a drying device 5 and a distillation device 6 are arranged.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings.
As shown in figure 1, the utility model relates to a processing apparatus of potassium dihydrogen phosphate crystallization mother liquor specifically includes mother liquor storage tank, elutriation agent storage tank, crystallizer, solid-liquid separation equipment, drying device, distillation plant, pipeline and pipeline valve, crystallization solid-liquid separation equipment liquid discharge gate passes through the pipe connection in mother liquor storage tank 1's the feed inlet and the potassium dihydrogen phosphate production, and mother liquor storage tank 1's discharge gate and 3 feed inlets of crystallizer are connected, and another feed inlet of crystallizer 3 then is connected with the discharge gate of elutriation agent storage tank 2, and 3 discharge gates of crystallizer are connected with solid-liquid separation equipment 4, the solid outlet and the drying device 5 of solid-liquid separation equipment 4 are connected, and solid-liquid separation equipment 4's discharge gate then is connected with distillation plant 6's feed inlet, and distillation plant 6's discharge gate and elutriation agent storage tank 2 feed inlets are connected.
The treatment device of the monopotassium phosphate crystallization mother liquor related by the utility model is described by combining the specific process conditions, and the implementation process is as follows: the crystallization mother liquor generated by filtration in the production of potassium dihydrogen phosphate flows into a mother liquor storage tank 1 through a pipeline, and is insulated by introducing hot water into a jacket of the storage tank, so that the mother liquor is prevented from separating out of a product in the storage tank; adding the mother liquor and ethanol into a crystallization tank 3 at the speed of 1:3 simultaneously for dissolving out crystals, in order to reduce the solubility of the product, introducing cold water into a jacket of the crystallization tank 3, controlling the stirring speed to ensure that the crystal grains of the separated product grow to a certain degree and then settle to the conical bottom of the crystallization tank 3, opening a valve at the bottom of the crystallization tank 3 at intervals of 30-60 min, sending the conical bottom layer crystal slurry into a centrifugal separator 4, pumping the separated filtrate to a plate-type distillation tower 6 through a pump, returning the ethanol separated by distillation to a dissolving agent storage tank 2, sending the separated solid into a hot air tower type dryer 5, and drying to obtain the potassium dihydrogen phosphate crystals.
Claims (10)
1. A processing apparatus of potassium dihydrogen phosphate crystallization mother liquor which characterized in that:
the device specifically comprises a mother liquor storage tank, a dissolving agent storage tank, a crystallization tank, a solid-liquid separation device, a drying device, a distillation device, a pipeline and a pipeline valve;
the feed inlet of mother liquor storage tank (1) is connected with crystallization solid-liquid separation equipment liquid discharge gate in the potassium dihydrogen phosphate production, and the discharge gate and the crystallization tank (3) feed inlet of mother liquor storage tank (1) are connected, and another feed inlet of crystallization tank (3) then is connected with the discharge gate of liquating agent storage tank (2), and crystallization tank (3) discharge gate is connected with solid-liquid separation equipment (4), the solid export and the drying device (5) of solid-liquid separation equipment (4) are connected, and the discharge gate of solid-liquid separation equipment (4) is connected with the feed inlet of distillation plant (6), and the discharge gate and the liquating agent storage tank (2) feed inlet of distillation plant (6) are connected.
2. The apparatus for treating a mother liquor for potassium dihydrogen phosphate crystallization according to claim 1, wherein said mother liquor storage tank is a tank with a jacket and a stirring device.
3. The apparatus for treating mother liquor of potassium dihydrogen phosphate crystallization as claimed in claim 1, wherein said crystallization tank is a reaction tank with jacket and stirring device, and the bottom is cone-shaped.
4. The apparatus for treating a mother liquor of monopotassium phosphate crystallization as defined in claim 2 or 3, wherein the stirring device is a paddle stirrer, a propeller stirrer, a turbine stirrer or an anchor stirrer.
5. The apparatus for treating potassium dihydrogen phosphate crystallization mother liquor according to claim 1, wherein said solid-liquid separation device is a centrifugal separator or a sand filter or a settling tank or a vacuum suction filter or a filter press.
6. The apparatus for processing mother liquor of potassium dihydrogen phosphate crystallization according to claim 1, wherein said drying apparatus is a horizontal boiling dryer, a hot air tower dryer, a fluidized bed dryer, a spray dryer, a rotary drum and a belt-like dryer.
7. The apparatus for processing a mother liquor for potassium dihydrogen phosphate crystallization according to claim 1, wherein said distillation apparatus is a plate distillation column or a packed distillation column.
8. The apparatus for treating monopotassium phosphate crystallization mother liquor according to claim 1, wherein a discharge port of the mother liquor storage tank (1) is connected with a feed port of the crystallization tank (3) through a pipe with a pump.
9. The apparatus for treating mother liquor of potassium dihydrogen phosphate crystallization as claimed in claim 1, wherein the discharge port of the elutriating agent storage tank (2) is connected with the feed port of the crystallization tank (3) through a pipe with a pump.
10. The apparatus for treating potassium dihydrogen phosphate crystallization mother liquor according to claim 1, wherein the discharge port of the solid-liquid separation device (4) is connected with the feed port of the distillation device (6) through a pipeline with a pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922472208.4U CN211445064U (en) | 2019-12-31 | 2019-12-31 | Processing apparatus of potassium dihydrogen phosphate crystallization mother liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922472208.4U CN211445064U (en) | 2019-12-31 | 2019-12-31 | Processing apparatus of potassium dihydrogen phosphate crystallization mother liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211445064U true CN211445064U (en) | 2020-09-08 |
Family
ID=72305472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922472208.4U Active CN211445064U (en) | 2019-12-31 | 2019-12-31 | Processing apparatus of potassium dihydrogen phosphate crystallization mother liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211445064U (en) |
-
2019
- 2019-12-31 CN CN201922472208.4U patent/CN211445064U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204173991U (en) | The recycling system of the waste liquid produced in the separation and purification of a kind of organic synthesis feed liquid | |
| CN108939599A (en) | A kind of self-loopa crystallizer and multistage continuous crystallisation process | |
| CN101293849A (en) | Process for preparing glutamic acid crystallization | |
| CN109608372A (en) | A kind of multistage continuous crystallisation process of corynebacterium methionine crystal | |
| CN112919505B (en) | Device and method for continuously producing lithium hydroxide from salt lake lithium-rich brine | |
| CN205472704U (en) | System for glauber's salt of production lithium hydroxide in -process carries out in succession freezing crystal separation | |
| CN115228126B (en) | Continuous high-temperature crystallization process for sulfate | |
| CN114933288B (en) | High-purity potassium dihydrogen phosphate and preparation method thereof | |
| CN111909058A (en) | Production method for producing metformin hydrochloride | |
| CN211445064U (en) | Processing apparatus of potassium dihydrogen phosphate crystallization mother liquor | |
| CN101239730B (en) | Method and device for producing crystal anhydrous lithium chloride | |
| EP2928828B1 (en) | Process and apparatus for producing ammonium sulfate crystals | |
| CN106987608B (en) | Dynamic crystallization method of calcium gluconate | |
| US2517601A (en) | Crystallization of glutamic acid derived from hydrolysates | |
| CN110282638B (en) | Method and device for preparing baking soda by double decomposition | |
| CN108392858A (en) | A kind of thickener | |
| CN112919506B (en) | Device and method for continuously producing lithium chloride from salt lake lithium-rich brine | |
| CN111518119B (en) | Continuous amoxicillin crystallization process | |
| WO2015041574A1 (en) | Method for processing sunflower or rapeseed meal (variants) | |
| CN211311345U (en) | Continuous desolventizing system device for mesitylene mother liquor containing 2,4, 6-trimethyl benzoic acid | |
| JPH0699346B2 (en) | Method and apparatus for crystallizing a manifold | |
| CN112939032A (en) | Method for preparing potassium nitrate by nitric acid method | |
| CN115520879B (en) | Method and device for continuously preparing granular ammonium sulfate by heterogeneous seed crystal | |
| CN215756474U (en) | Device for continuously producing lithium chloride from lithium-rich brine in salt lake | |
| CN217409771U (en) | Device for continuously preparing high-purity large-particle silver nitrate crystals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |