TWM447263U - Equipment for purifying potassium nitrate from waste produced in glass curing process - Google Patents

Description

Equipment for purifying potassium nitrate from waste generated by a glass hardening process

The present invention relates to a purification device for waste, and more particularly to an apparatus capable of efficiently purifying potassium nitrate from wastes containing potassium nitrate and sodium nitrate which are produced by a glass hardening process.

The general glass hardening process can be divided into physical hardening or chemical hardening. Among them, the chemical hardening process mainly immerses the sodium citrate glass to increase the strength into the potassium nitrate melt, and passes the chemical ion exchange reaction to the sodium citrate glass. The sodium ion which is less dense in the glass structure is replaced by the potassium ion in the potassium nitrate melt, and the sodium ion is replaced by the larger potassium ion to increase the strength of the glass surface.

Since most of the potassium nitrate component in the melt is gradually exchanged for sodium nitrate after a period of chemical ion exchange reaction, although the industrial pure potassium nitrate melt originally contains a trace amount of sodium ions, when the concentration of sodium nitrate is increased to a certain level To the extent that, for example, the concentration of sodium nitrate in the molten metal after the chemical ion exchange reaction is increased by several tens of times, a reverse reaction phenomenon may occur, that is, the sodium ions in the reacted molten metal and the potassium ions in the glass are again ionized. The reaction was exchanged so that the purpose of improving the surface strength of the glass could not be achieved.

Therefore, even if the reacted melt still contains potassium nitrate, it can no longer be used in the chemical hardening process. In order to slightly reduce the cost, a large amount of pure potassium nitrate melt is usually mixed with a small amount of the reacted melt, however, The use of a mixed solution affects the efficiency of the chemical hardening process, and the remaining reacted melt is discarded as waste, which is also very wasteful and not Environmental protection. In addition, since a large amount of pure potassium nitrate melt is required for each dilution, the cost cannot be significantly reduced.

In view of this, the main purpose of this creation is to provide a device capable of purifying potassium nitrate from waste generated by a glass hardening process so that potassium nitrate can be reused.

In order to achieve the foregoing objective, the present invention provides a device for purifying potassium nitrate for purifying potassium nitrate from solid waste containing potassium nitrate and sodium nitrate. The device for purifying potassium nitrate includes: A purification device comprising a purification tank, a heater, a thermostat, a temperature sensor, and a temperature controller. Wherein, the purification tank has a bottom, a peripheral wall connecting the bottom, and a chamber defined by the bottom and the peripheral wall, and the chamber can accommodate the solid waste. The heater is disposed at the bottom of the purification tank and can heat the solid waste to be melted into a waste liquid. The thermostat is coated on the peripheral wall of the purification tank to maintain the waste liquid at a temperature at which the waste liquid precipitates potassium nitrate crystals and adheres to the peripheral wall. The temperature sensor is used to sense the temperature of the waste liquid. The temperature controller is electrically connected to the heater, the thermostat and the temperature sensor, thereby effectively controlling the temperature of the waste liquid. Thereby, potassium nitrate in the solid waste can be efficiently purified for further recycling.

In the apparatus for purifying potassium nitrate provided by the present invention, the purification tank of the first purification device further has a top portion connected to the peripheral wall, and the first purification device may further comprise a thermostat disposed on the top of the purification tank.

In the apparatus for purifying potassium nitrate provided by the present invention, the first purification device may further comprise an inner cylinder, which is a hollow cylinder structure with open ends, and is disposed in the chamber. Thus, potassium nitrate crystals can also adhere to the wall of the inner cylinder, and at that time, it is only necessary to take out the inner cylinder, and the potassium nitrate crystal can be easily collected.

In the apparatus for purifying potassium nitrate provided by the present invention, the first purification device may further comprise a liquid level meter disposed in the chamber. Thereby, the approximate height of the potassium nitrate crystal attached to the peripheral wall can be known.

In the apparatus for purifying potassium nitrate provided by the present invention, the heater can heat the waste liquid to 400 ° C to 600 ° C, thereby completely melting the solid waste into a waste liquid.

In the apparatus for purifying potassium nitrate provided by the present invention, the thermostat can be maintained at 240 ° C to 350 ° C, so that the waste liquid can be maintained at 315 ° C to 350 ° C, so that the waste liquid can effectively precipitate nitric acid. Potassium crystallizes and adheres to the peripheral wall of the purification tank.

The apparatus for purifying potassium nitrate provided by the present invention may further comprise a second purification device and a connecting device for connecting the first and second purification devices.

First, the second purification device comprises a purification tank, a heater, a thermostat, a temperature sensor, and a temperature controller. Wherein, the purification tank has a bottom, a peripheral wall connecting the bottom, and a chamber defined by the bottom and the peripheral wall, and the chamber can accommodate the waste liquid flowing out from the purification tank of the first purification device . The heater is disposed at the bottom of the purification tank to heat the waste liquid to maintain the molten state. The thermostat is coated on the peripheral wall of the purification tank to maintain the waste liquid at The temperature at which the waste liquid precipitates potassium nitrate crystals and adheres to the peripheral wall. The temperature sensor is used to sense the temperature of the waste liquid. The temperature controller is electrically connected to the heater, the thermostat and the temperature sensor, thereby effectively controlling the temperature of the waste liquid.

Secondly, the connecting device comprises a valve, a connecting tube, and a heating unit. The communication tube has a first passage that communicates with the purification tank of the first purification device and the valve, and a second passage that communicates the valve with the purification tank of the second purification device, and when the valve is opened, the The waste liquid in the purification tank of the first purification device may flow from the first passage to the second passage. The heating unit has a temperature sensor, a heat insulating cotton, a heating belt, and a temperature control device. The temperature sensor is disposed on an outer surface of the communication tube for sensing a temperature of the communication tube. The insulating cotton coats the connecting pipe and the temperature sensor. The heating belt covers the insulating cotton and is used to heat the waste liquid in the connecting pipe to maintain a molten state. The temperature controller is electrically connected to the temperature sensor for controlling the temperature of the waste liquid in the connecting pipe.

Thereby, the potassium nitrate remaining in the waste liquid after the first purification can be further purified, so that the purification apparatus of the present invention can separate most of the potassium nitrate in the waste.

In addition, another object of the present invention is to provide a purification apparatus capable of separating potassium nitrate having different purities.

In order to achieve the above object, the apparatus for purifying potassium nitrate provided by the present invention further comprises a third purification device. The third purification device comprises a purification tank, a heater, a thermostat, a temperature sensor, and a temperature Degree controller. Wherein, the purification tank has a bottom, a peripheral wall connecting the bottom, and a chamber defined by the bottom and the peripheral wall, the chamber is capable of accommodating the molten liquid flowing out of the purification tank of the first purification device The melt is obtained by crystal melting of the peripheral wall of the purification tank of the first purification device. The heater is disposed at the bottom of the purification tank to heat the melt to maintain the molten state. The thermostat is coated on the peripheral wall of the purification tank to maintain the melt at a temperature at which the melt precipitates potassium nitrate crystals and adheres to the peripheral wall. The temperature sensor is used to sense the temperature of the melt. The temperature controller is electrically connected to the heater, the thermostat and the temperature sensor, thereby effectively controlling the temperature of the melt.

Secondly, the connecting pipe of the connecting device further has a third passage connecting the valve and the purification tank of the third purification device. Thus, when the valve is opened, the melt in the purification tank of the first purification device can flow from the first passage to the third passage.

Thereby, the melt melted from the peripheral wall of the purification tank of the first purification apparatus can be further purified, and a potassium nitrate crystal having higher purity can be obtained.

When the apparatus for purifying potassium nitrate provided by the present invention comprises the first and second purification devices, or the first, second and third purification devices are included, the bottom of the purification tank of the first purification device preferably has An arcuately recessed inner wall surface, and a through hole at a center of the inner wall surface and communicating with the first passage of the communication tube, and the first purification device preferably further includes a valve disposed on the hole wall of the through hole Therefore, the waste liquid or the melt can be completely flowed to the first passage to avoid remaining at the bottom of the purification tank.

Waste from the glass hardening process provided by this creation The details and characteristics of the equipment for purifying potassium nitrate will be described in more detail in the subsequent embodiments. However, it should be understood by those of ordinary skill in the art that the detailed description and the specific embodiments set forth in the present invention are only used to illustrate the present invention and are not intended to limit the scope of the patent application.

The technical content and features of the present invention will be described in detail below with reference to the accompanying drawings, wherein: FIG. 1 is a schematic view showing the apparatus for purifying potassium nitrate provided by the first embodiment of the present invention; The second drawing is similar to the first figure, but shows another aspect of the first purification device of the apparatus for purifying potassium nitrate of the first embodiment; the third figure is similar to the first figure, but shows the first embodiment. A further aspect of the first purification apparatus for the apparatus for purifying potassium nitrate; the fourth figure is a schematic diagram showing the apparatus for purifying potassium nitrate of the second embodiment of the present invention; and the fifth figure is similar to the fourth figure, but shows the present An apparatus for purifying potassium nitrate of the third embodiment was created.

The Applicant first describes here that in the embodiments to be described below, the same reference numerals denote the same or similar elements.

The equipment for purifying potassium nitrate provided by the present invention is mainly used for purifying potassium nitrate from solid waste containing potassium nitrate and sodium nitrate produced by the glass hardening process, in order to recover and reuse the purified potassium nitrate. . To this end, please refer to the first figure, the purification provided by the first embodiment of the present creation. The apparatus 10 for potassium nitrate mainly comprises a first purification unit 20.

The first purification device 20 mainly comprises a purification tank 21, a heater 23, a thermostat 25, a temperature sensor 27 and a temperature controller 29.

The purification tank 21 has a bottom portion 211, a peripheral wall 213 integrally connected to the bottom portion 211, and a chamber 215 defined by the bottom portion 211 and the peripheral wall 213. The chamber 215 is used to accommodate the solid waste. Things. In addition, since the waste may contain a mixture of salts other than potassium nitrate (KNO ₃ ) and sodium nitrate (NaNO ₃ ), such as phosphate, sulfate or nitrite Therefore, the purification tank 21 is preferably made of a stainless steel material having low reactivity with potassium and sodium ions and having salt corrosion resistance, thereby preventing the purification tank 21 from reacting with potassium and sodium ions to generate unnecessary reactants. And avoiding the purification tank 21 being damaged by the above-mentioned salt mixture at a high temperature, and forming the purification tank 21 by integral molding can prevent the joint material of the combined section from being eroded by the salt mixture at a high temperature. damage.

Next, the heater 23 is, in this example, but not limited to, a high temperature heating plate, which can be heated to about 400 ° C to 600 ° C; the heater 23 is disposed at the bottom 211 of the purification tank 21 for The solid waste in the purification tank 21 is heated and melted into a waste liquid W.

Furthermore, the thermostat 25 is, but not limited to, a bendable heating plate in this example, and is coated on the peripheral wall 213 of the purification tank 21. The thermostat 25 can be thermostated at 240 ° C to 350 ° C, whereby the waste liquid W is maintained at a temperature at which the waste liquid W can be precipitated out of the potassium nitrate crystal C, and is about 315 ° C to 350 ° C. °C.

It should be particularly noted that in order to enable the thermostat 25 to have a better constant temperature capability and the ability to adjust the temperature of the peripheral wall 213, a heat insulating cotton (not shown) may be further coated on the heating plate, and A vent valve (not shown) may be disposed between the insulating cotton and the heating plate adjacent to the top and bottom edges thereof, so that when the temperature of the waste liquid W is higher than a preset temperature, the vent valve may be opened. The circulating airflow is used to help cool down; conversely, when the temperature of the waste liquid W is lower than the preset temperature, the venting valve is closed to increase the temperature of the waste liquid W. Of course, the foregoing manner of improving the thermostat capability and the temperature adjustment capability of the thermostat 25 is merely an example, and the foregoing can also be achieved by other means, such as providing a cooling water passage.

In addition, the thermostat 25 in the present creation may also be a two-stage thermostat. In detail, the thermostat 25 may have first and second thermostats, wherein the first thermostat is coated on the peripheral wall. 213 is adjacent to the position of the heater 23; and the second thermostat is wrapped around the peripheral wall 213 adjacent to the first thermostat. Thereby, the peripheral wall 213 of the purification tank 21 can be maintained at two different temperatures to increase the efficiency of precipitation of potassium nitrate crystal C.

Regarding the temperature sensor 27 and the temperature controller 29, in this example, the temperature sensor 27 can be a high temperature type thermometer to measure the temperature of the waste liquid W; and the temperature controller 29 is electrically connected. The heater 23, the thermostat 25 and the temperature sensor 27 enable the temperature controller 29 to control the temperature rise of the heater 23 and the thermostat 25 according to the temperature signal of the waste liquid W fed back by the temperature sensor 27. Or cool down. Thus, when the temperature of the waste liquid W in the purification tank 21 exceeds or falls below a preset temperature, The temperature controller 29 then controls the heater 23 and the thermostat 25 to cool or raise the temperature to effectively control the temperature of the waste liquid W. Preferably, the temperature sensor 27 is disposed at a central position of the purification tank 21, and of course, there is no particular limitation, and it may be located at any position adjacent to the peripheral wall 213.

It should be noted that, as shown in the first figure, the purification tank 21 preferably further has a top portion 217 connecting the peripheral wall 213, and the first purification device 20 preferably further includes a thermostat disposed on the top portion 217. 25, electrically connected to the temperature controller 29, so that the temperature of the waste liquid W in the chamber 215 can be more uniform.

Moreover, as shown in the first figure, the purification tank 21 may further include a liquid level gauge 26 disposed in the chamber 215. The liquid level gauge 26 may be disposed in, but not limited to, Adjacent to the position of the peripheral wall 213, the approximate height of the potassium nitrate crystal C is known. In detail, the liquid level gauge 26 uses the conduction loop principle in this example to determine the height of the potassium nitrate crystal C by detecting the conductivity. For example, when the purification is started, the liquid level gauge 26 is in contact with The waste liquid W containing sodium and potassium ions is in a conducting state at this time, and the conductivity is high; when the potassium nitrate crystal C starts to precipitate, the precipitated potassium nitrate crystal C gradually covers the detection portion of the liquid level gauge 26, At this time, since a small amount of waste liquid W may infiltrate into the potassium nitrate crystal C, although the conduction state is still in conduction, the conductivity gradually decreases; when the precipitation crystal C covers the detection portion of the liquid level gauge 26, the more the amount is detected. At the time, the waste liquid W may no longer penetrate into the potassium nitrate crystal C, so that the conductivity may be lowered to near zero. Thus, by measuring the conductivity, the potassium nitrate crystal can be known. The approximate height of C.

It is also worth mentioning that, in order to facilitate the removal of the purified potassium nitrate crystal C, as shown in the second figure, in the apparatus 10 for purifying potassium nitrate of the present embodiment, the first purification device 20' preferably further comprises an inner portion. The cylinder 22 is a hollow cylinder structure with open ends. The inner cylinder 22 is housed in the chamber 215. Thus, the potassium nitrate crystal C precipitated from the waste liquid W can also adhere to the cylindrical wall 221 of the inner cylinder 22. When the purification is completed, only the inner cylinder 22 needs to be taken out, and the potassium nitrate crystal C can be easily collected.

Next, in order to facilitate the removal of the purified potassium nitrate crystal C and the waste liquid W remaining in the chamber 215, the first purification apparatus 20" may also be as shown in the third figure. The bottom portion 211 further has an inner wall surface 218 which is recessed in an arc shape, and a through hole 219 at the center of the inner wall surface 218, and the first purification device 20" further includes a hole wall disposed in the through hole 219. Valve 24. Thus, when the purification is completed, the remaining waste liquid W can be discharged from the through hole 219 by opening the valve 24, and does not remain in the bottom portion 211, thereby facilitating collection of the residual waste liquid W. Further, after the waste liquid W is discharged, the potassium nitrate crystal C adhering to the peripheral wall 213 can be heated again to a molten state so as to be discharged from the through hole 219 to facilitate collection of the purified potassium nitrate crystal C.

Of course, the method of taking out the waste liquid W remaining in the chamber 215 after purification and collecting the purified potassium nitrate crystal C is not limited to the above, and for example, the Taiwan novel patent previously obtained by the inventor of the present invention can be utilized. A negative pressure heat preservation extraction tube device disclosed in No. M426447, directly extracting the waste liquid W or the purified molten nitric acid from the chamber 215 Potassium.

The above is a detailed structural description of the apparatus 10 for purifying potassium nitrate provided in the first embodiment of the present invention, and the manner of use of the apparatus 10 for purifying potassium nitrate will be further described below.

In actual use, the solid waste is first placed in the chamber 215 of the purification tank 21, and then the heater 23 is heated to about 400 ° C to 600 ° C and left at this temperature for a period of time, for example, about 1 The solid waste was completely melted into waste liquid W by 10 hours. Here, by giving the temperature controller 29 a predetermined temperature, the temperature controller 29 can control the heater 23 and the thermostat 25 according to the temperature signal fed back by the temperature sensor 27 to make the waste liquid. W can be maintained at the preset temperature. Then, the temperature of the heater 23 is maintained at the aforementioned heating temperature (for example, about 450 ° C), and then the waste liquid is cooled in a stepwise manner, that is, at a slower and slower speed, in the waste liquid W. The potassium nitrate component can be precipitated. For example, first, a first preset temperature is set, for example, 350 ° C, that is, a temperature slightly higher than the freezing point temperature of potassium nitrate, and then the temperature is lowered to the first preset temperature at a first speed. Since the temperature of the waste liquid W adjacent to the peripheral wall 213 is slightly lower than the temperature of the waste liquid W adjacent to the bottom portion 211, the waste liquid W adjacent to the peripheral wall 213 gradually precipitates the potassium nitrate crystal C and adheres to the inner surface of the peripheral wall 213. Thereafter, setting a second preset temperature, for example, 340 ° C, that is, a temperature close to the freezing point temperature of the potassium nitrate, and then starting to cool down to the second preset temperature at a second speed slower than the first speed, At this time, the peripheral wall 213 will adhere to more and more potassium nitrate crystal C. Finally, a third preset temperature is set, for example, 310 ° C, that is, slightly lower than nitric acid The temperature at which the potassium freezing point is higher than the freezing point of the sodium nitrate, and then starts to decrease to the third predetermined temperature at a third speed slower than the second speed. At this time, the precipitation rate of the potassium nitrate crystal C is gradually slowed down.

It can be seen from the above statement that the apparatus 10 for purifying potassium nitrate provided by the present invention can effectively purify potassium nitrate from the solid waste generated by the glass hardening process, so that the purified potassium nitrate can reuse the glass hardening process, so Environmentally friendly and able to reduce costs.

Referring to the fourth figure, the apparatus 10' for purifying potassium nitrate provided by the second embodiment of the present invention mainly comprises the first purification device 20", a second purification device 30, and a company as shown in the third figure. The connecting device 40 of the first and second purification devices 20, 30 is passed.

Since the first purification device 20" has been fully described in the first embodiment, the applicant will not repeat it here, and the following description is only for different points.

The second purification device 30 is substantially similar to the first purification device 20" shown in the third figure, and also includes a purification tank 31, a heater 33, a thermostat 35, a temperature sensor 37, and a Temperature controller 39.

The purification tank 31 also has a bottom portion 311, a peripheral wall 313, and a chamber 315, but the chamber 315 is for containing the waste liquid W' flowing out from the purification tank 21; the heater 33 is also disposed at the same The bottom portion 311 of the purification tank 31 is for heating the waste liquid W' in the purification tank 31 to be maintained in a molten state. The thermostat 35, the temperature sensor 37, and the temperature controller 39 are substantially the same as the above, except that the thermostat 35 is mainly used to maintain the waste liquid W' in a waste liquid W'. Potassium knot The temperature is attached to the temperature of the peripheral wall 313; the temperature sensor 37 is mainly for sensing the temperature of the waste liquid W'; and the temperature controller 39 is for controlling the temperature of the waste liquid W'.

The bottom portion 311 of the purification tank 31 may have an inner wall surface 317 which is recessed in an arc shape, and a through hole 319 at the center of the inner wall surface 317. The second purification device 30 may also include a through hole disposed in the through hole. The valve 32 of the 319 hole wall has the same features and functions as those described in the first embodiment.

Next, the connecting device 40 includes a valve 41 (for example, a general on-off valve or a check valve, etc.), a communication tube 43, and a heating unit 45. In this example, in order to withstand high temperatures, the valve 41 uses a metal sealing valve member, and the aforementioned metal is stainless steel or copper.

The communication tube 43 has a first passage 431 that communicates with the purification tank 21 and the valve 41, and a second passage 433 that communicates with the valve 41 and the purification tank 31. Thus, when the valve 41 is opened, the purified waste liquid W' in the purification tank 21 can flow from the first passage 431 to the second passage 433.

The heating unit 45 has a temperature sensor 451, a heating belt 453, a heat insulating cotton 455, and a temperature controller 457. The temperature sensor 451 is disposed on the outer surface of the communication tube 43 for sensing the temperature of the communication tube 43. The heating belt 453 is wrapped around the communication tube 43 and the temperature sensor 451; The 455 is coated with the heating belt 453 for heating the waste liquid W' in the connecting pipe 43. The temperature controller 457 is electrically connected to the heating belt 453 and the temperature sensor 451 for controlling the connecting pipe. The temperature of the waste liquid W' in 43.

Thus, in actual use, when the waste liquid W in the purification tank 21 passes through the purification process as described above to become the purified waste liquid W', there is still possibility that the waste liquid W' remains unseparated. Potassium nitrate, therefore, the waste liquid W' can be introduced into the chamber 315 of the purification tank 31 via the communication tube 43, and the potassium nitrate can be further purified from the waste liquid W' by the same purification step as above. The purification apparatus 10' of the present invention is capable of separating most of the potassium nitrate in the waste.

Finally, please refer to the fifth figure. The apparatus 10" for purifying potassium nitrate provided by the third embodiment of the present invention mainly comprises the first purification device 20" as shown in the third figure, the second purification device 30, and a connection. Device 40' and a third purification device 50.

Since the greatest difference between this embodiment and the foregoing second embodiment is the connecting device 40' and the third purifying device 50, the applicant will only be described below with respect to differences.

The third purification device 50 is substantially similar to the first and second purification devices 20", 30, and also includes a purification tank 51, a heater 53, a thermostat 55, a temperature sensor 57, and a temperature controller. 59.

The purification tank 51 also has a bottom portion 511, a peripheral wall 513, and a chamber 515, but the chamber 515 is for containing the molten metal M flowing out of the purification tank 21, and the molten liquid M is from the purification tank 21 The crystal C of the peripheral wall 213 is melted. The heater 53 is also provided at the bottom 511 of the purification tank 51 for heating the molten metal M in the purification tank 51 to be maintained in a molten state. The thermostat 55, the temperature sensor 57, and the temperature controller 59 are substantially the same as the foregoing, except that the thermostat 55 is mainly Is used to maintain the melt M at a temperature at which the melt M precipitates potassium nitrate crystal C and adheres to the peripheral wall 513; the temperature sensor 57 is mainly used to sense the temperature of the melt M; The temperature controller 59 is used to control the temperature of the melt M.

The bottom portion 511 of the purification tank 51 may have an inner wall surface 517 which is recessed in an arc shape and a through hole 519 at the center of the inner wall surface. The third purification device 50 may also include a through hole 519. The valve 52 of the bore wall has the same features and functions as those described in the first embodiment.

The connecting device 40' includes the valve 41, a communication tube 43', and the heating unit 45. The valve 41 and the heating unit 45 are the same as those described in the second embodiment. The communication tube 43' also has a third passage 435 in this example to communicate the valve 41 and the purification tank 51. Thus, when the valve 41 is opened, the melt M in the purification tank 21 can flow from the first passage 431 to the third passage 435. In other words, the valve 41 can communicate with the first passage 431 and the second passage 433 as needed, or can communicate with the first passage 431 and the third passage 435.

Thus, in actual use, when the waste liquid W' in the purification tank 21 has flowed into the chamber 315 of the purification tank 31, the valve 24 is closed, and the heater 23 is again heated to adhere to the peripheral wall 213. The potassium nitrate crystal C is melted into the melt M, and then the valve 24 is opened to flow the melt M through the first passage 431 to the third passage 435, and finally introduced into the chamber 515 of the purification tank 51. Thereafter, the same purification step as above is used to further purify the potassium nitrate from the melt M, so that the purification device 10" of the present invention can further purify the potassium nitrate to obtain different purity. Potassium nitrate.

It should be noted that, please refer to the fourth and fifth figures again, although the second embodiment and the third embodiment of the present invention respectively connect the second purification device 30 to the first purification device 20", And attaching the second and third purification devices 30, 50 to the first purification device 20", but in practice, the number of interconnectable purification devices is not specific when performing such a batch purification step Restrictions, as long as the purpose of further purification can be achieved, in other words, the continuous batch purification process can be carried out by the equipment provided by the present creation.

In summary, the purified potassium nitrate equipment can not only effectively purify potassium nitrate from the solid waste generated by the glass hardening process, but also facilitates recycling and reuse, so it is environmentally friendly and can reduce the cost. Secondly, by providing a second purification device, the apparatus of the present invention can also purify most of the potassium nitrate in the waste, thereby having a better purification efficiency. Further, by providing the third purification device, the apparatus of the present invention is further provided with a function of obtaining potassium nitrate of different purity.

Finally, it must be stated that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention, any substitution, variation or modification of equivalent elements, and any combination of the first The aspect of the purification apparatus 20, 20', 20" and the second or third purification apparatus 30, 50 should also be covered by the scope of the patent application of this application.

10,10’,10”‧‧‧ Equipment for purifying potassium nitrate

20,20’,20”‧‧‧First purification unit

21‧‧‧purification tank

211‧‧‧ bottom

213‧‧‧The wall

215‧‧ ‧ room

217‧‧‧ top

218‧‧‧ inner wall

219‧‧‧through hole

22‧‧‧Inner tube

221‧‧‧

23‧‧‧heater

24‧‧‧ Valve

25‧‧‧ thermostat

26‧‧‧Level gauge

27‧‧‧ Temperature sensor

29‧‧‧ Temperature Controller

30‧‧‧Second purification unit

31‧‧‧ Purification tank

311‧‧‧ bottom

313‧‧‧The wall

315‧‧ ‧ room

317‧‧‧ inner wall

319‧‧‧through hole

32‧‧‧ Valve

33‧‧‧heater

35‧‧‧ thermostat

37‧‧‧Temperature sensor

39‧‧‧ Temperature Controller

40,40’‧‧‧Connecting device

41‧‧‧ valve

43,43’‧‧‧Connected pipe

431‧‧‧First Path

433‧‧‧second pathway

435‧‧‧ third pathway

45‧‧‧heating unit

451‧‧‧temperature sensor

453‧‧‧heating belt

455‧‧‧Insulation cotton

457‧‧‧temperature controller

50‧‧‧ Third purification unit

51‧‧‧purification tank

511‧‧‧ bottom

513‧‧‧Wall

515‧‧ ‧ room

517‧‧‧ inner wall

519‧‧‧through hole

52‧‧‧ Valve

53‧‧‧heater

55‧‧‧ thermostat

57‧‧‧temperature sensor

59‧‧‧ Temperature Controller

C‧‧‧ Crystallization

M‧‧‧ melt

W, W’‧‧‧ waste liquid

The first figure is a schematic view showing the apparatus for purifying potassium nitrate provided by the first embodiment of the present invention; the second drawing is similar to the first figure, but showing the first purification apparatus of the apparatus for purifying potassium nitrate of the first embodiment. Another aspect; the third figure is similar to the first figure, but shows another aspect of the first purification device of the apparatus for purifying potassium nitrate of the first embodiment; the fourth figure is a schematic view showing the creation of the first The apparatus for purifying potassium nitrate of the second embodiment; and the fifth drawing is similar to the fourth drawing, except that the apparatus for purifying potassium nitrate of the third embodiment of the present invention is shown.

10‧‧‧ Equipment for purifying potassium nitrate

20‧‧‧First purification unit

21‧‧‧purification tank

211‧‧‧ bottom

213‧‧‧The wall

215‧‧ ‧ room

217‧‧‧ top

23‧‧‧heater

25‧‧‧ thermostat

26‧‧‧Level gauge

27‧‧‧ Temperature sensor

29‧‧‧ Temperature Controller

C‧‧‧ Crystallization

W‧‧‧Waste liquid

Claims (10)

An apparatus for purifying potassium nitrate from waste generated by a glass hardening process, the waste being solid and comprising potassium nitrate and sodium nitrate, the device for purifying potassium nitrate comprising: a first purification device, the first purification The device comprises: a purification tank having a bottom, a peripheral wall connecting the bottom, and a chamber defined by the bottom and the peripheral wall for containing solid waste; a heater disposed in the purification tank a bottom portion for heating and melting the solid waste into a waste liquid; a thermostat covering the peripheral wall of the purification tank for maintaining the waste liquid in a state in which the waste liquid crystallizes and adheres to the waste liquid a temperature of the peripheral wall; a temperature sensor for sensing the temperature of the waste liquid; and a temperature controller electrically connecting the heater, the thermostat, and the temperature sensor for controlling the waste liquid temperature. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 1, wherein the purification tank of the first purification device has a top connected to the peripheral wall, and the first purification device further comprises a setting The thermostat of the temperature controller is electrically connected to the top of the purification tank. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 1, wherein the first purification apparatus further comprises an inner cylinder having an open structure at both ends and disposed in the chamber, the nitric acid The potassium crystal is attached to one of the inner cylinder walls. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 1, wherein the thermostat of the first purification device has a first thermostat adjacent to the heater, and a first thermostat adjacent to the heater The second thermostat of the piece has a temperature higher than a temperature of the second thermostat. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 1, wherein the first purification apparatus further comprises a liquid level meter disposed in the chamber, the liquid level meter is electrically conductive The degree of change is used to detect the height of the precipitated crystal. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process as claimed in claim 1, wherein the heater is capable of heating the waste liquid to 400 ° C to 600 ° C. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 1, wherein the thermostat is maintained at 240 ° C to 350 ° C, and the waste liquid is maintained at 315 ° C to 350 ° C. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 1, further comprising: a second purification device, and a connecting device connecting the first and second purification devices; wherein The second purification device comprises: a purification tank having a bottom, a peripheral wall connecting the bottom, and a waste liquid defined by the bottom and the peripheral wall for accommodating from the purification tank of the first purification device a heater disposed at the bottom of the purification tank for heating the The waste liquid is maintained in a molten state; a thermostat is coated on the peripheral wall of the purification tank for maintaining the waste liquid at a temperature at which the waste liquid precipitates potassium nitrate crystals and adheres to the peripheral wall; a sensor for sensing the temperature of the waste liquid; and a temperature controller electrically connecting the heater, the thermostat, and the temperature sensor for controlling the temperature of the waste liquid; and the connecting device The utility model comprises: a valve; a communication pipe having a first passage connecting the purification tank of the first purification device and the valve, and a second passage connecting the valve and the purification tank of the second purification device, when When the valve is opened, the waste liquid in the purification tank of the first purification device may flow from the first passage to the second passage; and a heating unit has a surface disposed on one of the communication tubes for sensing a temperature sensor for measuring the temperature of the communication tube, a heating belt covering the communication tube and the temperature sensor, a heat insulating cotton covering the heating belt and heating the waste liquid in the communication tube, and an electric heater Sexual connection A temperature controller of the temperature sensor to control the temperature of the waste liquid within the communicating pipe. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 8, further comprising: a third purification device, the third purification device comprising: a purification tank having a bottom, a peripheral wall connecting the bottom, and a melt defined by the bottom and the peripheral wall for accommodating the purification tank from the first purification device, the melt being a crystal of the purification tank peripheral wall of a purification device is melted; a heater is disposed at the bottom of the purification tank for heating the melt to maintain the molten state; a thermostat is coated in the purification tank a peripheral wall for maintaining the melt in a temperature at which the melt precipitates potassium nitrate crystals and adheres to the peripheral wall; a temperature sensor for sensing the temperature of the melt; and a temperature controller Electrically connecting the heater, the thermostat, and the temperature sensor for controlling the temperature of the melt; and the communication tube of the connecting device further has a purification tank communicating with the valve and the third purification device a three-passage, when the valve is opened, the molten liquid in the purification tank of the first purification device can flow from the first passage to the third passage; thereby, the device for purifying potassium nitrate can be continuously batched purification Cheng. The apparatus for purifying potassium nitrate from the waste generated by the glass hardening process according to claim 8 or 9, wherein the bottom of the purification tank of the first purification device has an arc-shaped concave inner wall surface, and one is located therein a through hole at a center of the wall and communicating with the first passage of the communication tube, and the first purification device further includes a valve disposed on the hole wall of the through hole.