Potassium sulfate production device

Abstract

The utility model discloses a potassium sulfate production device which comprises a burdening reaction tank, a filter, a crystal cultivating device, a settling tank, a centrifugal machine and a drying machine which are communicated with one another, and a feeding hole of the burdening reaction tank is respectively communicated with a first metering tank and a second metering tank through a pipeline and a valve; a gas outlet of the ingredient reaction tank is communicated with an alkali liquor spray tower and a water spray tower through a condenser, and an overflow port of the settling tank and a liquid outlet of the centrifugal machine are both communicated with a first metering tank. The device can effectively recycle the unreacted sulfuric acid solution, reduces the production energy consumption of potassium sulfate, reduces the wastewater treatment cost, is high in crystallization efficiency and sedimentation efficiency, and improves the production efficiency of potassium sulfate.

Description

Technical Field

[0001] The utility model relates to the technical field of potassium sulfate production, in particular to a potassium sulfate production device. Background Art

[0002] Potassium sulfate is an inorganic salt with the chemical formula K2SO4, and is a white crystalline powder. The appearance of agricultural potassium sulfate is mostly light yellow. Potassium sulfate has low hygroscopicity, is not easy to agglomerate, has good physical properties, and is easy to apply. It is a good water-soluble potassium fertilizer and the main raw material for making chlorine-free nitrogen, phosphorus, and potassium ternary compound fertilizers.

[0003] At present, potassium sulfate is mainly made of potassium chloride and sulfuric acid solution as raw materials, which react under certain conditions. The reaction liquid is filtered, crystallized, settled, centrifuged and dried to obtain the finished product. In the above process, an excess of sulfuric acid solution is often required to ensure the full conversion of potassium chloride. If the unreacted sulfuric acid solution is not recovered, it will not only waste resources, but also cause wastewater treatment costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a potassium sulfate production device is provided, which can effectively recycle unreacted sulfuric acid solution, reduce the energy consumption of potassium sulfate production, reduce the cost of wastewater treatment, and has high crystallization efficiency and sedimentation efficiency, thereby improving the production efficiency of potassium sulfate.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A potassium sulfate production device comprises a connected batching reaction tank, a filter, a crystal growing device, a settling tank, a centrifuge, and a dryer. The feed port of the batching reaction tank is connected to a first metering tank and a second metering tank through a pipeline and a valve, respectively. The gas outlet of the batching reaction tank is connected to an alkali solution spray tower and a water spray tower through a condenser. The overflow port of the settling tank and the liquid outlet of the centrifuge are both connected to the first metering tank.

[0007] As an improvement of the above technical solution, a first stirring mechanism is provided in the batching reaction tank, and the first stirring mechanism includes a first stirring shaft arranged in the batching reaction tank and a plurality of first stirring blades arranged on the first stirring shaft, and one end of the first stirring shaft is connected to a first stirring motor arranged on the top of the batching reaction tank.

[0008] As an improvement of the above technical solution, a filter plate is provided in the filter, the filter plate is arranged obliquely, and the lower end of the filter plate extends to the slag discharge port of the filter.

[0009] As an improvement of the above technical solution, a vibration motor is provided at the bottom of the filter plate, and a protective cover is provided on the outside of the vibration motor.

[0010] As an improvement of the above technical solution, the alkali solution spray tower and the water spray tower are provided with multiple layers of porous plates, and spray mechanisms are provided between the multiple layers of porous plates.

[0011] As an improvement of the above technical solution, the inner wall of the sedimentation tank is provided with staggered and cross-arranged and downwardly inclined baffle plates.

[0012] As an improvement of the above technical solution, a second stirring mechanism is provided in the crystal growing vessel, and the second stirring mechanism includes a second stirring motor arranged on the top of the crystal growing vessel and a second stirring shaft connected to the second stirring motor, and a plurality of second stirring blades are arranged on the second stirring shaft.

[0013] As an improvement of the above technical solution, a third stirring mechanism is provided at the bottom of the crystal growing vessel, and the third stirring mechanism includes a third stirring shaft arranged perpendicularly to the second stirring shaft and a plurality of third stirring blades arranged obliquely on the third stirring shaft, and the third stirring shaft is connected to a third stirring motor arranged on the side wall of the crystal growing vessel.

[0014] As an improvement of the above technical solution, a pit is provided at the end of the third stirring blade.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The gas outlet of the batching reaction tank of the device is connected to the alkali solution spray tower and the water spray tower through a condenser, so that the waste gas generated during the reaction process is condensed and absorbed in time, which is more environmentally friendly. The overflow port of the sedimentation tank of the device and the liquid outlet of the centrifuge are both connected to the first metering tank. The above arrangement allows the sulfuric acid solution that does not participate in the reaction to be recycled, reducing the preparation cost of the product.

[0017] A filter plate is provided in the filter of the device. The filter plate is arranged obliquely. The lower end of the filter plate extends to the residue discharge port of the filter. A vibration motor is provided at the bottom of the filter plate. The filter plate vibrates under the vibration of the vibration motor, thereby timely removing the filter residue deposited on the surface of the filter plate and improving the filtering efficiency.

[0018] The device is provided with a second stirring mechanism in the crystal growing vessel, and a third stirring mechanism is provided at the bottom of the crystal growing vessel. Through the combined action of the second stirring mechanism and the third stirring mechanism, the heat exchange efficiency in the crystal growing vessel is greatly improved, thereby improving the crystallization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0023] In the figure, 1. batching reaction tank; 2. filter; 3. crystal growing device; 4. sedimentation tank; 5. centrifuge; 6. dryer; 7. first metering tank; 8. second metering tank; 9. condenser; 10. alkali solution spray tower; 11. water spray tower; 12. first stirring shaft; 13. first stirring blade; 14. first stirring motor; 15. filter plate; 16. vibration motor; 17. protective cover; 18. porous plate; 19. spray mechanism; 20. material baffle plate; 21. second stirring motor; 22. second stirring shaft; 23. second stirring blade; 24. third stirring motor; 25. third stirring shaft; 26. third stirring blade; 27. pit. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0027] Example 1

[0028] like Figure 1-Figure 3 As shown, a potassium sulfate production device includes a connected batching reaction tank 1, a filter 2, a crystal growing device 3, a settling tank 4, a centrifuge 5, and a dryer 6. The feed port of the batching reaction tank 1 is connected to a first metering tank 7 and a second metering tank 8 through a pipeline and a valve, respectively. The gas outlet of the batching reaction tank 1 is connected to an alkali solution spray tower 10 and a water spray tower 11 through a condenser 9. The overflow port of the settling tank 4 and the liquid outlet of the centrifuge 5 are both connected to the first metering tank 7.

[0029] Sulfuric acid solution and potassium chloride are added to the batching reaction tank 1 through the first metering tank 7 and the second metering tank 8 respectively, and the reaction is carried out under certain conditions. The harmful waste gas generated in the reaction process is condensed by the condenser 9 and then enters the alkali solution spray tower 10 and the water spray tower 11 for absorption treatment respectively; the potassium sulfate solution after the reaction enters the crystal growing device 3 for cooling and crystallization treatment, and the crystallized liquid enters the settling tank 4 for sedimentation. The precipitate at the bottom of the settling tank 4 is deliquescence treated again by the centrifuge 5. Since the sulfuric acid solution is generally excessive, the supernatant in the settling tank 4 and the liquid after centrifugation by the centrifuge 5 contain sulfuric acid solution. This part of the solution enters the first metering tank 7 and is reused for preparing sulfuric acid solution to reduce the production cost of the product.

[0030] Furthermore, in this embodiment, a first stirring mechanism is provided in the batching reaction tank 1, and the first stirring mechanism includes a first stirring shaft 12 provided in the batching reaction tank 1 and a plurality of first stirring blades 13 provided on the first stirring shaft 12, and one end of the first stirring shaft 12 is connected to a first stirring motor 14 provided on the top of the batching reaction tank 1. The provision of the first stirring mechanism can improve the heat exchange efficiency in the batching reaction tank 1, and make the raw materials more fully mixed, and under the stirring condition, the waste gas and liquid are more easily discharged.

[0031] Furthermore, in this embodiment, a filter plate 15 is provided in the filter 2, the filter plate 15 is tilted, and the lower end of the filter plate 15 extends to the slag discharge port of the filter 2; further, a vibration motor 16 is provided at the bottom of the filter plate 15, and a protective cover 17 is provided outside the vibration motor 16. Under the action of the vibration motor 16, the filter residue can be discharged through the slag discharge port in time to prevent it from accumulating on the surface of the filter plate 15 and affecting the filtering efficiency.

[0032] Furthermore, in this embodiment, the alkali solution spray tower 10 and the water spray tower 11 are provided with multiple layers of porous plates 18, and spray mechanisms 19 are provided between the multiple layers of porous plates 18. The above arrangement greatly improves the exhaust gas absorption efficiency.

[0033] Further, in this embodiment, the inner wall of the settling tank 4 is provided with staggered and downwardly inclined baffle plates 20. Under the action of the baffle plates 20, the crystals and liquid in the crystallization liquid are separated, and the settling efficiency is improved.

[0034] Furthermore, in this embodiment, a second stirring mechanism is provided in the crystal growing vessel 3, and the second stirring mechanism includes a second stirring motor 21 arranged on the top of the crystal growing vessel 3 and a second stirring shaft 22 connected to the second stirring motor 21, and a plurality of second stirring blades 23 are provided on the second stirring shaft 22.

[0035] Furthermore, a third stirring mechanism is provided at the bottom of the crystal-growing vessel 3, and the third stirring mechanism includes a third stirring shaft 25 vertically arranged with the second stirring shaft 22 and a plurality of third stirring blades 26 obliquely arranged on the third stirring shaft 25, and the third stirring shaft 25 is connected to a third stirring motor 24 arranged on the side wall of the crystal-growing vessel 3; a pit 27 is provided at the end of the third stirring blade 26. The provision of the second stirring mechanism improves the heat exchange efficiency in the crystal-growing vessel 3, thereby improving the crystallization efficiency. The provision of the third stirring blade 26 and the pit 27 can turn over the feed liquid at the bottom of the crystal-growing vessel 3, thereby making the feed liquid in the crystal-growing vessel 3 more fully mixed, making the crystal and the uncrystallized solution mix more thoroughly, and improving the crystallization efficiency.

[0036] In addition, it should be understood that after reading the contents taught in the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A potassium sulfate production device, characterized in that: It includes a connected batching reaction tank, a filter, a crystal growing device, a sedimentation tank, a centrifuge, and a dryer. The feed port of the batching reaction tank is connected to a first metering tank and a second metering tank through a pipeline and a valve respectively. The gas outlet of the batching reaction tank is connected to an alkali solution spray tower and a water spray tower through a condenser. The overflow port of the sedimentation tank and the liquid outlet of the centrifuge are both connected to the first metering tank.

2. A potassium sulfate production device according to claim 1, characterized in that: A first stirring mechanism is provided in the batching reaction tank, and the first stirring mechanism includes a first stirring shaft arranged in the batching reaction tank and a plurality of first stirring blades arranged on the first stirring shaft, and one end of the first stirring shaft is connected to a first stirring motor arranged on the top of the batching reaction tank.

3. A potassium sulfate production device according to claim 1, characterized in that: A filter plate is arranged in the filter, and the filter plate is arranged obliquely, and the lower end of the filter plate extends to the slag discharge port of the filter.

4. A potassium sulfate production device according to claim 3, characterized in that: A vibration motor is arranged at the bottom of the filter plate, and a protective cover is arranged at the outer side of the vibration motor.

5. A potassium sulfate production device according to claim 1, characterized in that: The alkali solution spray tower and the water spray tower are provided with multiple layers of porous plates, and spray mechanisms are provided between the multiple layers of porous plates.

6. A potassium sulfate production device according to claim 1, characterized in that: The inner wall of the sedimentation tank is provided with staggered and cross-arranged material baffle plates that are inclined downward.

7. A potassium sulfate production device according to claim 1, characterized in that: A second stirring mechanism is provided in the crystal cultivating vessel, and the second stirring mechanism includes a second stirring motor arranged on the top of the crystal cultivating vessel and a second stirring shaft connected to the second stirring motor, and a plurality of second stirring blades are provided on the second stirring shaft.

8. A potassium sulfate production device according to claim 7, characterized in that: A third stirring mechanism is provided at the bottom of the crystal cultivating vessel, and the third stirring mechanism includes a third stirring shaft arranged perpendicularly to the second stirring shaft and a plurality of third stirring blades arranged obliquely on the third stirring shaft. The third stirring shaft is connected to a third stirring motor arranged on the side wall of the crystal cultivating vessel.

9. A potassium sulfate production device according to claim 8, characterized in that: The end of the third stirring blade is provided with a pit.

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