Crystallization device for potassium nitrate production

Abstract

The utility model relates to a crystallization device for potassium nitrate production, belongs to the technical field of potassium nitrate production, and solves the technical problem that when potassium nitrate is gradually separated out in a crystallizer, part of solution is collected when the solution does not reach a complete crystallization state. The crystallization device for potassium nitrate production comprises a crystallization barrel, a spray pipe and a filter part, the crystallization barrel is provided with a crystallization space for potassium nitrate crystallization, one end of the spray pipe is communicated with a potassium nitrate solution, the other end of the spray pipe extends into the crystallization space, and the filter part is installed in the crystallization space and located below the spray pipe. Therefore, the crystallization device for potassium nitrate production provided by the utility model can be used for separating the potassium nitrate crystals from the potassium nitrate solution, so that the potassium nitrate crystals can be conveniently collected.

Description

Technical Field

[0001] The utility model belongs to the technical field of potassium nitrate production, and particularly relates to a crystallization device for potassium nitrate production. Background Art

[0002] Potassium nitrate is an important chemical raw material and is widely used in agriculture, industry and other fields. In the production process of potassium nitrate, the crystallization device is one of the key equipment, which is used to precipitate potassium nitrate in the solution in the form of crystals, thereby achieving product separation and purification.

[0003] Patent application number 201810050074.4 provides a potassium nitrate spray crystallizer, including a tank body, a fixed rod and a solution box. One side of the tank body is fixedly connected to the solution box by a fixed rod, a rotating shaft is rotatably connected inside the solution box, a stirring blade is fixedly connected to the outside of the rotating shaft, a motor is fixedly connected to the lower end of the solution tank, and the motor is fixedly connected to the rotating shaft through a shaft connector. A cooling device is fixedly connected to the top of the tank body, and the cooling device includes a shell, an air inlet and an air outlet. The air inlet is located at the upper end of the shell, and the air outlet is located at the lower end of the shell. An evaporator is fixedly connected inside the shell, a water separator is fixedly connected to the upper end of the evaporator, and the water separator is connected to the evaporator. A water tank is fixedly connected to the inner wall of the shell, and a No. 2 circulating water pump is arranged on one side of the water tank.

[0004] The prior art represented by the above patents has the following problems:

[0005] When potassium nitrate is gradually precipitated, part of the solution is collected before it reaches a completely crystallized state, which not only affects the purity of potassium nitrate but also may cause a waste of resources. Utility Model Content

[0006] The utility model provides a crystallization device for potassium nitrate production, which is used to solve the technical problem that when potassium nitrate is gradually precipitated in a crystallizer, part of the solution is collected before reaching a completely crystallized state.

[0007] The utility model is realized by the following technical scheme: a crystallization device for potassium nitrate production, comprising:

[0008] a crystallization barrel having a crystallization space for crystallizing potassium nitrate;

[0009] A spray pipe, one end of which is connected to the potassium nitrate solution and the other end of which extends deep into the crystallization space;

[0010] A filter element is installed in the crystallization space and below the spray pipe.

[0011] Optionally, it also includes:

[0012] The collecting box is installed on the outer wall of the crystallization barrel. The outer wall of the crystallization barrel is provided with an opening, the opening is communicated with the crystallization space, and the collecting box is located below the opening.

[0013] Optionally, the edge of the filter element abuts against the inner wall of the crystallization barrel, and the axis of the filter element protrudes in a direction close to the spray pipe.

[0014] Optionally, the diameter of the filter element gradually increases from an end of the filter element close to the spray pipe to an end of the filter element far from the spray pipe.

[0015] Optionally, it also includes:

[0016] A rotating shaft is rotatably mounted in the filter barrel, the filter element is mounted on the rotating shaft, and the rotating shaft rotates to drive the filter element to rotate along the axial direction of the filter barrel.

[0017] Optionally, it also includes:

[0018] A push plate has one end mounted on the filter element and the other end abutting against the inner wall of the crystallization barrel. The rotating shaft rotates to drive the push plate to push the potassium nitrate crystals to move.

[0019] Optionally, it also includes:

[0020] A reflux pipe has one end connected to the filter barrel and the other end connected to the spray pipe.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model provides a crystallization device for potassium nitrate production, which comprises a crystallization barrel, a spray pipe and a filter element, wherein the crystallization barrel has a crystallization space for potassium nitrate crystallization, one end of the spray pipe is connected with a potassium nitrate solution, and the other end extends into the crystallization space, and the filter element is installed in the crystallization space and is located below the spray pipe.

[0023] Through the above structure, when the crystallization device for potassium nitrate production provided by the utility model is used, first, the spray pipe sprays potassium nitrate solution, the potassium nitrate solution falls on the filter element, the precipitated potassium nitrate crystals stay on the filter element, and the potassium nitrate solution that fails to precipitate crystals falls into the crystallization barrel through the filter element. Therefore, the crystallization device for potassium nitrate production provided by the utility model can separate potassium nitrate crystals from potassium nitrate solution, so as to facilitate the collection of potassium nitrate crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic structural diagram of a crystallization device for potassium nitrate production provided by the utility model;

[0026] Figure 2 This is a cross-sectional view of a crystallization device for potassium nitrate production provided by the utility model;

[0027] Figure 3 It is a structural schematic diagram of the filter element in the embodiment of the utility model.

[0028] In the figure:

[0029] 1-crystallization barrel; 11-crystallization space; 12-opening; 2-spray pipe; 3-filter element; 4-collection box; 5-rotating shaft; 6-push plate; 7-reflux pipe. DETAILED DESCRIPTION

[0030] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0034] Example

[0035] The utility model provides a crystallization device for potassium nitrate production, which is used to solve the technical problem that when potassium nitrate is gradually precipitated in a crystallizer, part of the solution is collected before reaching a completely crystallized state. The utility model provides a crystallization device for potassium nitrate production, which includes a crystallization barrel 1, a spray pipe 2 and a filter 3, wherein:

[0036] The crystallization barrel 1 has a crystallization space 11 for potassium nitrate crystallization, and potassium nitrate solution is crystallized in the crystallization space 11 .

[0037] One end of the spray pipe 2 is connected to the potassium nitrate solution, and the other end extends into the crystallization space 11. The spray pipe 2 is used to extract the potassium nitrate solution and then spray it in the crystallization space 11. In order to facilitate the precipitation of potassium nitrate crystals, cold air can be introduced into the crystallization barrel 1. The cold air enters the tank body, causing the air to flow upward rapidly, thereby exchanging heat with the fine droplets sprayed into atomized form from the nozzle, causing the potassium nitrate to crystallize, thereby making the potassium nitrate crystallize faster.

[0038] The filter element 3 is installed in the crystallization space 11, and the filter element 3 is located below the spray tube 2. The crystallized potassium nitrate crystals fall on the filter element 3, so as to facilitate the collection of the crystallized potassium nitrate crystals. The potassium nitrate solution that fails to crystallize in time falls to the bottom of the crystallization barrel 1 through the filter element 3. The filter element 3 is used to separate the crystallized potassium nitrate crystals from the potassium nitrate solution that fails to crystallize. The filter element 3 can be a filter net.

[0039] Through the above structure, when the crystallization device for potassium nitrate production provided by the utility model is used, first, the spray pipe 2 sprays potassium nitrate solution, the nitric acid solution falls on the filter 3, the precipitated potassium nitrate crystals stay on the filter 3, and the potassium nitrate solution that fails to precipitate crystals falls into the crystallization barrel 1 through the filter 3. Therefore, the crystallization device for potassium nitrate production provided by the utility model can separate potassium nitrate crystals from potassium nitrate solution, so as to facilitate the collection of potassium nitrate crystals.

[0040] An optional implementation of the present embodiment is as follows: in order to facilitate the collection of crystallized potassium nitrate crystals, the crystallization device for potassium nitrate production also includes a collecting box 4, which is mounted on the outer wall of the crystallization barrel 1. An opening 12 is provided on the outer wall of the crystallization barrel 1, and the opening and closing are connected to the crystallization space 11. Potassium nitrate crystals enter the collecting box 4 through the opening 12 for collection. The collecting box 4 is located below the opening 12, so that the potassium nitrate crystals falling from the opening 12 can fall into the collecting box 4 through the opening 12, thereby facilitating the collection of the crystallized potassium nitrate crystals.

[0041] An optional implementation of this embodiment is as follows: the edge of the filter element 3 abuts against the inner wall of the crystallization barrel 1, so as to reduce the potassium nitrate crystals from falling from the gap between the filter element 3 and the filter barrel to the bottom of the filter element 3, and the axis of the filter element 3 protrudes in the direction close to the spray tube 2, so that the potassium nitrate crystals can move along the surface of the filter element 3 from the end of the filter element 3 close to the spray tube 2 to the end of the filter element 3 away from the spray tube 2, thereby facilitating the collection of the potassium nitrate crystals.

[0042] An optional implementation of the present embodiment is as follows: the diameter of the filter element 3 gradually increases from the end of the filter element 3 close to the spray tube 2 to the end away from the spray tube 2, that is, the filter element 3 of the crystallization device for potassium nitrate production provided in the present embodiment can be conical or hemispherical or other shapes, so that the potassium nitrate crystals can move along the surface of the filter element 3 from the end of the filter element 3 close to the spray tube 2 to the end of the filter element 3 away from the spray tube 2, thereby facilitating the collection of the potassium nitrate crystals.

[0043] An optional implementation of the present embodiment is as follows: In order to facilitate the collection of potassium nitrate crystals, the crystallization device for potassium nitrate production also includes a rotating shaft 5, which is rotatably installed in the filter barrel, and the filter element 3 is rotatably installed on the rotating shaft 5. The rotating shaft 5 rotates, thereby driving the filter element 3 to rotate, thereby driving the filter element 3 to rotate along the axial direction of the filter barrel, so that the filter element 3 drives the potassium nitrate crystals to move, so as to facilitate the potassium nitrate crystals to move to the opening 12, so that the potassium nitrate crystals fall into the collection box 4 through the opening 12.

[0044] An optional implementation of the present embodiment is as follows: In order to better drive the potassium nitrate crystals on the filter element 3 to move, the crystallization device for potassium nitrate production also includes a push plate 6, one end of the push plate 6 is installed on the side of the filter element 3 close to the spray tube 2, and the other end is abutted against the inner wall of the crystallization barrel 1, and the rotating shaft 5 rotates, thereby driving the filter element 3 to drive the push plate 6 to push the potassium nitrate crystals to move, thereby better pushing the potassium nitrate crystals from the opening 12 into the collection box 4.

[0045] An optional implementation of the present embodiment is as follows: In order to facilitate the recrystallization of the potassium nitrate solution that falls from the filter element 3, the crystallization device for potassium nitrate production also includes a reflux pipe 7, one end of the reflux pipe 7 is connected to the filter barrel, and the other end is connected to the spray pipe 2. When in use, the potassium nitrate solution in the crystallization barrel 1 is drawn into the spray pipe 2 through the pump body, and then sprayed out through the spray pipe 2, thereby crystallizing the potassium nitrate again.

[0046] In summary, when a crystallization device for potassium nitrate production provided by the utility model is used, first, the spray pipe 2 will spray out potassium nitrate solution, the nitric acid solution falls on the filter element 3, and the precipitated potassium nitrate crystals remain on the filter element 3. The potassium nitrate crystals can move along the surface of the filter element 3 from the end of the filter element 3 close to the spray pipe 2 to the end of the filter element 3 away from the spray pipe 2, so as to facilitate the collection of potassium nitrate crystals, the rotating shaft 5 rotates, thereby driving the filter element 3 to rotate, thereby driving the filter element 3 to rotate along the axial direction of the filter barrel, so that the filter element 3 drives the potassium nitrate crystals to move, and the filter element 3 drives the push plate 6 to push the potassium nitrate crystals to move, so as to facilitate the potassium nitrate crystals to move to the opening 12, so that the potassium nitrate crystals fall into the collecting box 4 through the opening 12, and the potassium nitrate solution that fails to precipitate crystals falls into the crystallization barrel 1 through the filter element 3, and the potassium nitrate solution in the crystallization barrel 1 is extracted into the spray pipe 2 by the pump body, and then sprayed out through the spray pipe 2, so as to crystallize the potassium nitrate again. Therefore, the crystallization device for potassium nitrate production provided by the utility model can separate potassium nitrate crystals from potassium nitrate solution, thereby facilitating the collection of potassium nitrate crystals.

[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A crystallization device for potassium nitrate production, characterized in that: include: a crystallization barrel having a crystallization space for crystallizing potassium nitrate; A spray pipe, one end of which is connected to the potassium nitrate solution and the other end of which extends deep into the crystallization space; A filter is installed in the crystallization space and located below the spray pipe.

2. A crystallization device for potassium nitrate production according to claim 1, characterized in that, Also includes: The collecting box is installed on the outer wall of the crystallization barrel. The outer wall of the crystallization barrel is provided with an opening, the opening is communicated with the crystallization space, and the collecting box is located below the opening.

3. A crystallization device for potassium nitrate production according to claim 2, characterized in that, The edge of the filter element abuts against the inner wall of the crystallization barrel, and the axis of the filter element protrudes toward the direction close to the spray pipe.

4. A crystallization device for potassium nitrate production according to claim 3, characterized in that, The diameter of the filter element gradually increases from an end of the filter element close to the spray pipe to an end of the filter element far away from the spray pipe.

5. A crystallization device for potassium nitrate production according to claim 4, characterized in that, Also includes: A rotating shaft is rotatably mounted in the crystallization barrel, the filter element is mounted on the rotating shaft, and the rotating shaft rotates to drive the filter element to rotate along the axial direction of the crystallization barrel.

6. A crystallization device for potassium nitrate production according to claim 5, characterized in that: Also includes: A push plate has one end mounted on the filter element and the other end abutting against the inner wall of the crystallization barrel. The rotating shaft rotates to drive the push plate to push the potassium nitrate crystals to move.

7. A crystallization device for potassium nitrate production according to claim 1, characterized in that: Also includes: A reflux pipe has one end connected to the crystallization barrel and the other end connected to the spray pipe.

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