CN219023307U

CN219023307U - Cooling crystallization tank for monoammonium phosphate production

Info

Publication number: CN219023307U
Application number: CN202223515234.9U
Authority: CN
Inventors: 郭培东; 刘洋; 卢伟; 周小旗; 刘华
Original assignee: Shanghai Zhuoxinda Biotechnology Co ltd
Current assignee: Shanghai Zhuoxinda Biotechnology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-16
Anticipated expiration: 2032-12-28

Abstract

The cooling crystallization tank for monoammonium phosphate production comprises a crystallization tank, an air compressor, an electromagnetic valve, an electric stirrer, an air extractor, a supporting seat, a vibrating motor, an upper cover, a pressure gauge and a receiving tank; the filter mechanism is also provided; the upper cover is arranged at the upper end of the crystallization tank; the electromagnetic valves are six, the electromagnetic valve, the electric stirrer, the air extractor, the supporting seat, the vibrating motor, the upper cover, the pressure gauge, the material receiving tank, the filtering mechanism and the crystallization tank are arranged together. After this novel monoammonium phosphate thick liquids get into the crystallizer in, stir thick liquids and air exhauster through electric mixer to combine the cooling water that flows circulation, the compressed air that lets in can accelerate thick liquids cooling and crystallization time, and can discharge after the crystallization finishes with remaining moisture possibly, filtering mechanism filtration through compressed air, reduced the dry time of follow-up drying equipment like this. This novel staff has brought the facility, and has improved work efficiency. In conclusion, the novel water-based paint has good application prospect.

Description

Cooling crystallization tank for monoammonium phosphate production

Technical Field

The utility model relates to the technical field of auxiliary equipment for chemical production, in particular to a cooling crystallization tank for monoammonium phosphate production.

Background

Crystallization is one of important links in the production process of chemical products, and a cooling crystallization tank is also one of the most widely used equipment in chemical production. In the prior art, when preparing monoammonium phosphate, 85% of hot phosphoric acid is properly diluted in equipment, then the diluted monoammonium phosphate is introduced into a venturi type airflow mixing reactor (equipment), ammonia gas is introduced into the venturi type airflow mixing reactor (equipment) for mixing reaction, after the reaction is finished, the mixed solution is filtered by a filter, the filtrate is transferred into a cooling crystallization tank for cooling crystallization, and the crystallized material is dried by a drying device to obtain monoammonium phosphate finished products.

The prior cooling crystallization tank generally comprises a crystallization container and an electric stirrer, such as patent number 201220116917.4 in China, and the patent name of the patent is a bubbling cooling crystallization tank, which records that bubbling is generated in the crystallization tank through high-pressure air and a bubbling pipe, so that the cooling surface is wide, the cooling area is large, and the cooling effect is greatly improved; the bubbling pipe is easy to install and use, simple and feasible to clean and maintain and low in cost. The above-mentioned patent shows that the cooling crystallization effect is accelerated to some extent by bubbling air into the liquid, but the patent is limited in structure, and more or less has some problems, and the patent is embodied as follows. The method comprises the following steps: after the mixed solution enters the crystallization tank for cooling crystallization, the liquid after precipitation is pumped out by staff by adopting liquid pumping equipment (such as a water pump) and the like, so that the crystallization in the crystallization tank can be discharged. And two,: because the discharge of the liquid (mother liquor) after crystallization is controlled in an artificial way, the liquid in the solid after crystallization cannot be effectively discharged as much as possible, the heat energy required by the subsequent drying process is increased, and the energy consumption is relatively high. And thirdly,: although the cooling rate of the liquid can be relatively increased by introducing bubbles or the like into the liquid, the amount of gas introduced is limited after all, and therefore the cooling rate of the liquid and the crystallization rate of the solid cannot be further increased. In summary, it is particularly necessary to provide a cooling crystallization tank which can increase the crystallization speed, effectively realize solid-liquid separation, and reduce the labor intensity of workers.

Disclosure of Invention

In order to overcome the defects of the prior cooling crystallization tank as the background due to the limitation of the structure, the utility model provides the cooling crystallization tank which can automatically separate solid and liquid after cooling crystallization under the combined action of related mechanisms, and the cooling crystallization tank which is used for producing monoammonium phosphate and improving the working efficiency is convenient for staff by circulating cooling water and introducing cold air into the liquid to accelerate the cooling crystallization of the liquid.

The technical scheme adopted for solving the technical problems is as follows:

the cooling crystallization tank for monoammonium phosphate production comprises a crystallization tank, an air compressor, an electromagnetic valve, an electric stirrer, an air extractor, a supporting seat, a vibrating motor, an upper cover, a pressure gauge and a receiving tank; the filter is characterized by also comprising a filter mechanism; the crystallization tank is of a double-layer structure, and the upper cover and the upper end of the crystallization tank are arranged together; six electromagnetic valves are arranged, one end of a first electromagnetic valve, one end of a second electromagnetic valve and an air inlet pipe of a pressure gauge are respectively arranged on the upper cover, the air inlet pipe of the air extractor is connected with the other end of the second electromagnetic valve, and the other end of the first electromagnetic valve is connected with a filter liquid discharge pipe used for monoammonium phosphate production; the electric stirrer is arranged outside the upper cover, and the stirring shaft and the stirring blades of the electric stirrer are positioned in the crystallization tank; two sides of the crystallization tank are respectively provided with connecting pipes which are communicated with each other in the inner layer and the outer layer, one end of a third electromagnetic valve is connected with the other end of one connecting pipe, the other end of the third electromagnetic valve is connected with a tap water pipe, one end of the outer side of the crystallization tank is also provided with an air pipe which is communicated with the interior of the crystallization tank, and one end of a fourth electromagnetic valve is connected with the other end of the air pipe; the lower end of the crystallization tank is provided with a discharging pipe communicated with the inside of the crystallization tank, one end of the discharging pipe is connected with one end of a fifth electromagnetic valve, one end of the sixth electromagnetic valve is connected in parallel, a plurality of supporting feet are arranged at the distance between the lower end of the crystallization tank and the lower end of the supporting feet, the lower ends of the supporting feet are arranged on a supporting seat, the material receiving tank is positioned below the other end of the sixth electromagnetic valve, and the filtering mechanism is arranged together with the other end of the fifth electromagnetic valve; the vibrating motors are arranged in multiple sets, and the multiple sets of vibrating motors are respectively arranged around the outer side end of the crystallization tank.

Further, the upper end of the material receiving tank is of an open structure, an observation hole is formed in the upper end of the upper cover, and a waste liquid barrel is arranged at the lower end of the fifth electromagnetic valve.

Further, one end of the first electromagnetic valve, one end of the second electromagnetic valve, an air inlet pipe of the pressure gauge and the crystallization tank are communicated.

Further, the magnetic valve is a normally closed spool electromagnetic valve.

Further, the filtering mechanism comprises an upper filtering shell, a lower filtering shell and a filter plate, wherein a plurality of filtering holes are distributed on the surface of the filter plate, the filter plate is arranged between the upper filtering shell and the lower filtering shell, the upper filtering shell and the lower filtering shell are movably connected together, the upper end of the upper filtering shell is provided with a communicating pipe A, the lower end of the lower filtering shell is provided with a communicating pipe B, and the communicating pipe A is connected with the other end of the fifth electromagnetic valve.

The utility model has the beneficial effects that: after this novel monoammonium phosphate thick liquids get into the crystallizer in, stir thick liquids and air exhauster through electric mixer to combine the cooling water that flows circulation, the compressed air that lets in can accelerate thick liquids cooling and crystallization time, and can discharge after the crystallization finishes with remaining moisture possibly, filtering mechanism filtration through compressed air, reduced the dry time of follow-up drying equipment like this. This novel staff has brought the facility, and has improved work efficiency. In conclusion, the novel water-based paint has good application prospect.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the overall structure and a partial enlarged structure of the present utility model.

FIG. 2 is a schematic diagram of the structure of the filtering mechanism of the present utility model.

Detailed Description

The cooling crystallization tank for monoammonium phosphate production shown in fig. 1 and 2 comprises a crystallization tank 1, an air compressor (not shown in the drawing), an electromagnetic valve, an electric stirrer 2, an electric air pump 3, a supporting seat 4, a vibrating motor 5, an upper cover 6, a pressure gauge 7 and a material receiving tank 8 (a plurality of material receiving tanks); the filter mechanism is also provided; the circular crystallization tank 1 is of a double-layer structure, the upper end of the circular crystallization tank 1 is of an open structure, the upper end of the crystallization tank 1 is welded with an annular hollow connecting flange plate 101, and an upper cover 6 is hermetically installed with the upper end flange plate 101 of the crystallization tank through a plurality of fixing holes at the side end and screw nuts; six electromagnetic valves are arranged, one end of a first electromagnetic valve 91, one end of a second electromagnetic valve 92 and air inlet pipes of a pressure gauge 7 are respectively arranged at the left end and the right end of an upper cover 6, the air inlet pipe of an air extractor 3 is connected with the other end of the second electromagnetic valve 92 through threads, and the other end of the first electromagnetic valve 91 is connected with a liquid discharge pipe of a filter (not shown in the figure) used for monoammonium phosphate production through a pipeline; the middle part of the upper end of the upper cover 6 is provided with an opening, the electric stirrer 2 is hermetically arranged outside the middle part of the upper end of the upper cover 6 through a screw nut, and a stirring shaft and blades of the electric stirrer enter the crystallization tank 1 through the opening; the upper right part and the lower left part of the crystallization tank 1 are respectively welded with a connecting pipe 10 which is communicated with the inside and the outside of the crystallization tank, one end of a third electromagnetic valve 93 is in threaded connection with the connecting pipe at the upper right part, the other end of the third electromagnetic valve 93 is connected with a tap water pipe and the like through pipelines, the left end connecting pipe 10 is connected with a wastewater pool in a production area through pipelines (the wastewater is used for being reused in other processes, the wastewater after heat dissipation can also be pumped into the third water valve through a water pump to dissipate heat for the crystallization tank, so that the water is reused), the middle right outer part of the crystallization tank 1 is welded with an air pipe which is communicated with the inside of the crystallization tank, one end of a fourth electromagnetic valve 94 is in threaded connection with the outer end of the air pipe, and the other end of the fourth electromagnetic valve 94 is connected with an exhaust pipe of an air compressor through pipelines; the lower end of the crystallization tank 1 is vertically welded with a discharging pipe 11 communicated with the inside of the crystallization tank 1, the discharging pipe 11 is connected with one end of a three-way pipe, the second end, the third end and one end of five electromagnetic valves 95, and one end of a sixth electromagnetic valve 96 are connected through a pipeline, three supporting feet 12 are welded at a certain distance from the lower end of the crystallization tank 1, the lower end of each supporting foot 12 is welded on a supporting seat 4, a material receiving tank 8 is positioned below the other end of the sixth electromagnetic valve 96, and a filtering mechanism is installed together with the other end of the fifth electromagnetic valve 95; the three sets of vibration motors 5 are annularly distributed and are respectively arranged around the lower outer side end of the crystallization tank 1 through screw nuts. The fifth solenoid valve 95 has a waste liquid tank 18 with an open upper end placed at its lower end.

As shown in fig. 1 and 2, the upper end of the material receiving tank 8 is of an open structure, and a tempered glass plate 13 is mounted in the middle of the upper end of the upper cover 6 in a sealing manner (which is convenient for workers to watch the material in the crystallization tank 1 from top to bottom). One end of the first electromagnetic valve 91, one end of the second electromagnetic valve 92, the air inlet pipe of the pressure gauge 7 and the crystallization tank are communicated. The six electromagnetic valves are normally closed valve core electromagnetic valves with 220V working voltage, the power input ends of the six electromagnetic valves, the power input end of the electric stirrer, the power input ends of the electric air pump and the vibration motor are respectively connected in series through a power switch and connected with an alternating current 220V power supply through wires, the power switch is arranged in the element box, the handle is positioned outside the front end opening of the element box 14, and the element box 14 is arranged at the upper middle part outside the front end of the crystallization tank 1. The filter mechanism comprises an upper filter shell 15, a lower filter shell 16 and a filter plate 17, wherein a plurality of filter holes are distributed on the surface of the filter plate 17, the filter plate 17 is installed between the upper filter shell 15 and the lower filter shell 16, the upper filter shell 15 and the lower filter shell 16 are connected together through threads (the filter plate can be conveniently split and cleaned after being blocked), a communicating pipe A151 is welded outside the middle part of the upper end of the upper filter shell 15, a communicating pipe B161 is welded outside the middle part of the lower end of the lower filter shell 16, and the communicating pipe A151 and the other end of the fifth electromagnetic valve 96 are connected through threads.

As shown in fig. 1 and 2, during the novel production, the power supply of the electromagnetic valve 91 is firstly turned on by a worker, so that slurry discharged from the liquid discharge pipe of the filter used for producing monoammonium phosphate enters the crystallization tank 1 through the electromagnetic valve 91 opened by the valve core, the power supply switch is turned off after the slurry is measured, and then the power supply switch of the second electromagnetic valve 92, the third electromagnetic valve 93, the fourth electromagnetic valve 94, the electric air extractor 3 and the electric stirrer 2 is turned on by the worker, so that tap water enters the space between the inner layer and the outer layer of the outside of the crystallization tank 1 from the electromagnetic valve 93 opened by the valve core and flows out from the left lower end, and heat of materials in the crystallization tank 1 can be taken away in the flowing-out process of cooling water; compressed air enters the crystallization tank 1 through the solenoid valve 94 opened by the valve core and can impact slurry to roll so as to be beneficial to heat dissipation; after the electric stirrer 2 is powered on, stirring blades of the electric stirrer can stir the slurry to accelerate movement for heat dissipation; the electric air extractor 3 generates negative pressure suction after being electrified to discharge hot air generated by heat dissipation of slurry in the crystallization tank to the atmosphere through the electromagnetic valve 92 opened by the valve core in time; through the above, the utility model can improve the cooling crystallization speed of slurry. After the slurry is sufficiently cooled and crystallized at intervals, the worker turns on the power switch of the fifth electromagnetic valve 95 except the power switch of the fourth electromagnetic valve 94, and turns on all other power switches, so that the compressed air output by the air machine drives the water (actually mother liquor) separated out from monoammonium phosphate after crystallization to be filtered by the filter plate 17, and then discharged into the waste liquid barrel 18 for uniform treatment by the subsequent worker; due to the high pressure of the compressed air, the separated water can be effectively discharged into the waste liquid barrel after being filtered by the filter plate. During the filtration process, the staff observes the pressure of the barometer, and if the pressure is too high, the power switch of the fourth electromagnetic valve 94 can be temporarily turned off, so that the equipment damage caused by the too high pressure in the crystallization tank is prevented (the power switch of the electromagnetic valve 94 is turned off after the filtration is completed). After all the filtering is finished, the staff turns on the power switch of the vibrating motor 5 and the sixth electromagnetic valve 96, so that the crystallized monoammonium phosphate after filtering falls into the receiving tank 8 through the electromagnetic valve 96 opened by the valve core under the vibrating action, and simultaneously, the power switch of the electromagnetic valve 94 can be turned on, and under the action of the air compressor, the raw materials can fall out into the receiving tank 8 more easily (can be transferred and replaced by another empty receiving tank 8 after being filled). After the materials are discharged, all the power switches are turned off, and the process is completely consistent with the process, and the next batch of monoammonium phosphate slurry cooling crystallization work can be performed. In fig. 1, the electric stirrer 2 is an electric stirrer driven by a gear reducer of a coaxial motor, has the power of 2.5KW (220V), and is driven by a power output shaft to rotate by stirring blades during working, and the rotating speed of the stirring blades is 180 revolutions per minute; the power of the electric air extractor 3 is 1KW (220V), the electric air extractor is provided with a motor, a volute and blades, the motor drives the blades in the volute to rotate, and the blades discharge air in the crystallization tank sucked by the air inlet pipe part through an exhaust pipe; the vibration motor 5 is a vibration motor finished product (220V) with the power of 500W; the

solenoid valves

91, 92, 93, 94, 95, 96 are finished normally closed spool solenoid valves with operating voltage alternating current 220V and power 3W.

It should be understood by those skilled in the art that although the present disclosure describes embodiments, the embodiments do not include only a single embodiment, and the description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art, so that the scope of the present disclosure is defined by the claims.

Claims

1. The cooling crystallization tank for monoammonium phosphate production comprises a crystallization tank, an air compressor, an electromagnetic valve, an electric stirrer, an air extractor, a supporting seat, a vibrating motor, an upper cover, a pressure gauge and a receiving tank; the filter is characterized by also comprising a filter mechanism; the crystallization tank is of a double-layer structure, and the upper cover and the upper end of the crystallization tank are arranged together; six electromagnetic valves are arranged, one end of a first electromagnetic valve, one end of a second electromagnetic valve and an air inlet pipe of a pressure gauge are respectively arranged on the upper cover, the air inlet pipe of the air extractor is connected with the other end of the second electromagnetic valve, and the other end of the first electromagnetic valve is connected with a filter liquid discharge pipe used for monoammonium phosphate production; the electric stirrer is arranged outside the upper cover, and the stirring shaft and the stirring blades of the electric stirrer are positioned in the crystallization tank; two sides of the crystallization tank are respectively provided with connecting pipes which are communicated with each other in the inner layer and the outer layer, one end of a third electromagnetic valve is connected with the other end of one connecting pipe, the other end of the third electromagnetic valve is connected with a tap water pipe, one end of the outer side of the crystallization tank is also provided with an air pipe which is communicated with the interior of the crystallization tank, and one end of a fourth electromagnetic valve is connected with the other end of the air pipe; the lower end of the crystallization tank is provided with a discharging pipe communicated with the inside of the crystallization tank, one end of the discharging pipe is connected with one end of a fifth electromagnetic valve, one end of the sixth electromagnetic valve is connected in parallel, a plurality of supporting feet are arranged at the distance between the lower end of the crystallization tank and the lower end of the supporting feet, the lower ends of the supporting feet are arranged on a supporting seat, the material receiving tank is positioned below the other end of the sixth electromagnetic valve, and the filtering mechanism is arranged together with the other end of the fifth electromagnetic valve; the vibrating motors are arranged in multiple sets, and the multiple sets of vibrating motors are respectively arranged around the outer side end of the crystallization tank.

2. The cooling crystallization tank for monoammonium phosphate production according to claim 1 wherein the upper end of the receiving tank is of an open structure, the upper end of the upper cover is provided with an observation hole, and the lower end of the fifth electromagnetic valve is provided with a waste liquid tank.

3. The cooling crystallization tank for monoammonium phosphate production according to claim 1, wherein one end of the first electromagnetic valve, one end of the second electromagnetic valve, an air inlet pipe of the pressure gauge and the crystallization tank are communicated.

4. The cooling crystallization tank for monoammonium phosphate production according to claim 1 wherein the solenoid valve is a normally closed spool solenoid valve.

5. The cooling crystallization tank for monoammonium phosphate production according to claim 1 wherein the filtering mechanism comprises an upper filter shell, a lower filter shell and a filter plate, wherein a plurality of filter holes are distributed on the surface of the filter plate, the filter plate is arranged between the upper filter shell and the lower filter shell, the upper filter shell and the lower filter shell are movably connected together, the upper end of the upper filter shell is provided with a communicating pipe A, the lower end of the lower filter shell is provided with a communicating pipe B, and the communicating pipe A is connected with the other end of the fifth electromagnetic valve.