CN214218192U

CN214218192U - Production and storage system for preventing anhydrous dipotassium hydrogen phosphate from caking

Info

Publication number: CN214218192U
Application number: CN202120192222.3U
Authority: CN
Inventors: 刘宗飞; 付强
Original assignee: Jiangsu Mupro Ift Corp
Current assignee: Jiangsu Mupro Ift Corp
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-09-17
Anticipated expiration: 2031-01-22

Abstract

The utility model relates to an anhydrous dipotassium hydrogen phosphate production and storage system, concretely relates to production and storage system for preventing anhydrous dipotassium hydrogen phosphate caking. The system include neutralization reaction kettle, phosphoric acid storage tank and potassium hydroxide storage tank export are connected respectively to the import at neutralization reaction kettle top, neutralization reaction kettle's exit linkage pressure filter's import, the exit linkage dipotassium hydrogen phosphate liquid storage tank's of pressure filter import, the exit linkage spray drier's of dipotassium hydrogen phosphate liquid storage tank import, spray drier's exit linkage water-cooling spiral cooler's import, the exit linkage mixing kettle's of water-cooling spiral cooler import, mixing kettle's exit linkage vacuum packaging machine's import, vacuum packaging machine's exit linkage storage device's import, storage device and constant temperature and humidity machine intercommunication. The utility model discloses equipment is simple, and is rational in infrastructure, can effectively prevent anhydrous dipotassium hydrogen phosphate caking, and the reliability is high, and is with low costs, simple and easy to can improve energy utilization.

Description

Production and storage system for preventing anhydrous dipotassium hydrogen phosphate from caking

Technical Field

The utility model relates to an anhydrous dipotassium hydrogen phosphate production and storage system, concretely relates to production and storage system for preventing anhydrous dipotassium hydrogen phosphate caking.

Background

The anhydrous dipotassium hydrogen phosphate is an inorganic compound with a chemical formula of K₂HPO₄The appearance of the water-soluble alcohol-soluble sodium alginate is white crystal or amorphous white powder, the water-soluble sodium alginate is easily soluble in water, the water solution is slightly alkaline, the water solution is slightly soluble in alcohol, the water solution has hygroscopicity, and the water-soluble sodium alginate is self-soluble at higher temperature. The relative density is 2.338, and the molecule is internally dehydrated and converted into potassium pyrophosphate at 204 ℃. The pH of the 1% aqueous solution was 8.9. The method is mainly used for medicine, fermentation, bacterial culture, potassium pyrophosphate preparation and the like. At present, the method for industrially producing anhydrous dipotassium hydrogen phosphate is a neutralization method of liquid potassium hydroxide and liquid phosphoric acid, after neutralization reaction, the pH of reaction liquid is controlled to be 8.5-9.0, filtering and impurity removal are carried out by a filter press, and obtained filtrate enters a spray dryer to obtain an anhydrous dipotassium hydrogen phosphate product with the water content of below 0.15%.

Because the anhydrous dipotassium hydrogen phosphate has hygroscopicity, when the external environment humidity of the product becomes high and the temperature is high, the anhydrous dipotassium hydrogen phosphate can absorb the moisture in the environment, so that the product is dissolved by itself. When the temperature is lowered, the autolysed portion of the finished powder forms lumps. Some high-end customers specifically require that the finished anhydrous dipotassium phosphate powder not contain lumps. In order to maintain the product performance and properties of the anhydrous dipotassium phosphate and meet high-end customer requirements, the quality of the anhydrous dipotassium phosphate product needs to be continuously improved.

SUMMERY OF THE UTILITY MODEL

According to the deficiency among the above prior art, the utility model aims at providing a production and storage system who prevents anhydrous dipotassium phosphate caking, equipment is simple, and is rational in infrastructure, can effectively prevent anhydrous dipotassium phosphate caking, and the reliability is high, and is with low costs, simple and easy to can improve energy utilization.

The utility model provides a technical scheme that its technical problem adopted is:

prevent production and storage system of anhydrous dipotassium phosphate caking, including neutralization reaction cauldron, phosphoric acid storage tank and potassium hydroxide storage tank export are connected respectively to the import at neutralization reaction cauldron top, neutralization reaction cauldron's exit linkage pressure filter's import, the import of the exit linkage dipotassium phosphate liquid storage tank of pressure filter, the import of the exit linkage spray drier of dipotassium phosphate liquid storage tank, spray drier's exit linkage water-cooling spiral cooler's import, the import of the exit linkage mixing kettle of water-cooling spiral cooler, the exit linkage vacuum packaging machine's of mixing kettle import, vacuum packaging machine's exit linkage storage device's import, storage device and constant temperature and humidity machine intercommunication.

Wherein:

preferably, a pump is arranged between the neutralization reaction kettle and the filter press.

Preferably, a pump is arranged between the filter press and the dipotassium phosphate liquid storage tank.

Preferably, a pump is arranged between the dipotassium hydrogen phosphate liquid storage tank and the spray dryer.

Preferably, an anticaking agent adding device is arranged above the mixing kettle.

The working principle and the process are as follows:

when the system works, raw materials of phosphoric acid and liquid potassium hydroxide enter a neutralization reaction kettle from a storage tank, neutralization reaction is carried out for about 1 hour at 70-80 ℃, and the pH of the final reaction liquid is controlled to be 8.5-9.0. And (3) carrying out filter pressing on the reaction liquid by a filter press, and then feeding the filtrate into a dipotassium hydrogen phosphate liquid storage tank.

And (4) feeding the liquid finished product dipotassium hydrogen phosphate into a spray dryer for spray drying, and controlling the water content of the product to be below 0.15%. The product which is just dried has high temperature, so that the product can easily absorb moisture in the air to cause autolysis and generate agglomeration. And a water-cooling spiral cooler is arranged behind the spray dryer, the finished hot material which is just dried enters the water-cooling spiral cooler for cooling, and hot water generated by the heat of the material can be used as domestic washing hot water or hot water for dissolving the material in other workshops. Further improving the utilization rate of energy and reducing the energy waste.

And putting the cooled finished anhydrous dipotassium phosphate powder into a mixing kettle, starting the mixing kettle to stir, and adding an anhydrous anti-caking agent to uniformly mix the finished anhydrous dipotassium phosphate and the anti-caking agent. This step further reduces the risk of caking of the finished anhydrous dipotassium phosphate powder.

The mixed finished anhydrous dipotassium hydrogen phosphate powder enters a vacuum packaging machine, and air in the packaging bag is pumped to dry, so that the product is in a relatively vacuum environment, and the contact with the air environment is avoided.

The finished product after vacuum packaging enters a storage device, a constant temperature and humidity machine is arranged, the storage environment temperature is kept between 5 ℃ and 8 ℃ all the time, and the relative humidity is kept between 34% and 35%. And an automatic control system is adopted, so that the air humidity and the temperature of the whole storage device are controlled and monitored in the whole process. On the basis of product vacuum packaging, the temperature and humidity of a storage environment are further controlled, so that the product is stored for a long time in a low-temperature drying environment, and the risk of water absorption and autolysis agglomeration of the product is basically eliminated.

Compared with the prior art, the utility model, following beneficial effect has:

(1) the utility model discloses equipment is simple, and is rational in infrastructure, synthesizes cooling treatment, adds anticaking agent, vacuum packaging, keeps four aspects of low temperature drying storage environment to handle anhydrous dipotassium hydrogen phosphate finished product, and the reliability is high, and is with low costs, simple and easy.

(2) The hot water generated in the product cooling process is fully utilized, and the energy utilization rate is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

in the figure: 1. a phosphoric acid storage tank; 2. a potassium hydroxide storage tank; 3. a neutralization reaction kettle; 4. a filter press; 5. a dipotassium phosphate liquid storage tank; 6. a spray dryer; 7. a water-cooled screw cooler; 8. a mixing kettle; 9. a vacuum packaging machine; 10. a storage device; 11. a constant temperature and humidity machine.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1

As shown in figure 1, the production and storage system for preventing anhydrous dipotassium phosphate from caking comprises a neutralization reaction kettle 3, wherein an inlet at the top of the neutralization reaction kettle 3 is respectively connected with outlets of a phosphoric acid storage tank 1 and a potassium hydroxide storage tank 2, an outlet of the neutralization reaction kettle 3 is connected with an inlet of a filter press 4, an outlet of the filter press 4 is connected with an inlet of a dipotassium phosphate liquid storage tank 5, an outlet of the dipotassium phosphate liquid storage tank 5 is connected with an inlet of a spray dryer 6, an outlet of the spray dryer 6 is connected with an inlet of a water-cooling spiral cooler 7, an outlet of the water-cooling spiral cooler 7 is connected with an inlet of a mixing kettle 8, an outlet of the mixing kettle 8 is connected with an inlet of a vacuum packaging machine 9, an outlet of the vacuum packaging machine 9 is connected with an inlet of a device 10, and the storage device 10 is communicated with a constant temperature and humidity machine 11.

A pump is arranged between the neutralization reaction kettle 3 and the filter press 4.

A pump is arranged between the filter press 4 and the dipotassium phosphate liquid storage tank 5.

A pump is arranged between the dipotassium phosphate liquid storage tank 5 and the spray dryer 6.

An anticaking agent adding device is arranged above the mixing kettle 8.

When the system works, raw materials of phosphoric acid and liquid potassium hydroxide enter a neutralization reaction kettle 3 from a storage tank, neutralization reaction is carried out for about 1 hour at 70-80 ℃, and the pH of the final reaction liquid is controlled to be 8.5-9.0. After the reaction liquid is subjected to pressure filtration by a filter press 4, the filtrate enters a dipotassium hydrogen phosphate liquid storage tank 5.

And (3) feeding the liquid finished product dipotassium hydrogen phosphate into a spray dryer 6 for spray drying, and controlling the water content of the product to be below 0.15%. The product which is just dried has high temperature, so that the product can easily absorb moisture in the air to cause autolysis and generate agglomeration. And a water-cooling spiral cooler 7 is arranged behind the spray dryer 6, the finished hot material which is just dried enters the water-cooling spiral cooler 7 for cooling, and hot water generated by the heat of the material can be used as domestic washing hot water or hot water for dissolving materials in other workshops. Further improving the utilization rate of energy and reducing the energy waste.

And putting the cooled finished anhydrous dipotassium phosphate powder into the mixing kettle 8, starting the mixing kettle 8 to stir, and adding the anhydrous anti-caking agent to uniformly mix the finished anhydrous dipotassium phosphate and the anti-caking agent. This step further reduces the risk of caking of the finished anhydrous dipotassium phosphate powder.

The mixed finished anhydrous dipotassium hydrogen phosphate powder enters a vacuum packaging machine 9, and air in the packaging bag is pumped to be dry, so that the product is in a relatively vacuum environment, and the contact with the air environment is avoided.

The finished product after vacuum packaging enters a storage device 10, and a constant temperature and humidity machine 11 is arranged to keep the storage environment temperature between 5 ℃ and 8 ℃ and the relative humidity between 34% and 35% all the time. And an automatic control system is adopted to realize the whole-course control and supervision of the air humidity and the temperature of the whole storage device 10. On the basis of product vacuum packaging, the temperature and humidity of a storage environment are further controlled, so that the product is stored for a long time in a low-temperature drying environment, and the risk of water absorption and autolysis agglomeration of the product is basically eliminated.

Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.

Claims

1. A production and storage system for preventing caking of anhydrous dipotassium hydrogen phosphate, characterized in that: the device comprises a neutralization reaction kettle (3), wherein an inlet at the top of the neutralization reaction kettle (3) is respectively connected with outlets of a phosphoric acid storage tank (1) and a potassium hydroxide storage tank (2), an outlet of the neutralization reaction kettle (3) is connected with an inlet of a filter press (4), an outlet of the filter press (4) is connected with an inlet of a dipotassium hydrogen phosphate liquid storage tank (5), an outlet of the dipotassium hydrogen phosphate liquid storage tank (5) is connected with an inlet of a spray dryer (6), an outlet of the spray dryer (6) is connected with an inlet of a water-cooling spiral cooler (7), an outlet of the water-cooling spiral cooler (7) is connected with an inlet of a mixing kettle (8), an outlet of the mixing kettle (8) is connected with an inlet of a vacuum packaging machine (9), an outlet of the vacuum packaging machine (9) is connected with an inlet of a storage device (10), and the storage device (10) is communicated with a constant temperature and humidity machine (11).

2. The system for the production and storage of anhydrous dipotassium phosphate against caking according to claim 1, characterized in that: a pump is arranged between the neutralization reaction kettle (3) and the filter press (4).

3. The system for the production and storage of anhydrous dipotassium phosphate against caking according to claim 1, characterized in that: a pump is arranged between the filter press (4) and the dipotassium phosphate liquid storage tank (5).

4. The system for the production and storage of anhydrous dipotassium phosphate against caking according to claim 1, characterized in that: a pump is arranged between the dipotassium phosphate liquid storage tank (5) and the spray dryer (6).