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A method and device for controlling the pH value of a finished ammonium nitrate aqueous solution

A technology of a control device and a control method, applied in directions such as explosives, can solve problems such as explosions, and achieve the effects of low consumption, ensuring safety, and flexible operation

Inactive Publication Date: 2016-08-17
ANHUI WANBEI COAL REFCO GRP LTD HANSHAN HENGTAI NONMETALLIC MATERIALS BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ammonium nitrate has the danger of explosion in the presence of high temperature, high pressure, oxidizable substances (reducing agents) and electric sparks, there is currently no quick and safe control method for adjusting its pH value.

Method used

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  • A method and device for controlling the pH value of a finished ammonium nitrate aqueous solution
  • A method and device for controlling the pH value of a finished ammonium nitrate aqueous solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of control method of finished product ammonium nitrate aqueous solution pH value, comprises the following steps:

[0043] (1) First open the vent valve on the top of the storage tank to communicate with the atmosphere, keep the inside of the storage tank at normal pressure, transport the finished ammonium nitrate aqueous solution to the storage tank, and adjust the nitric acid in the storage tank through the heater installed at the bottom of the storage tank. The temperature of the ammonium aqueous solution is 110°C;

[0044] (2) Open air compressor, make its outlet pressure be 0.1Mpa, compressed air enters in the ammonium nitrate aqueous solution by being located at the air distributor inside storage tank after drying, degreasing, it is stirred;

[0045](3) Start the circulating delivery pump located at the outlet of the storage tank, and mix the ammonium nitrate aqueous solution for 10 minutes by self-circulation;

[0046] (4) Sampling and analyzing the PH val...

Embodiment 2

[0048] A kind of control method of finished product ammonium nitrate aqueous solution pH value, comprises the following steps:

[0049] (1) First open the vent valve at the top of the storage tank to communicate with the atmosphere, keep the inside of the storage tank at normal pressure, transport the finished ammonium nitrate aqueous solution to the storage tank, and adjust the nitric acid in the storage tank through the heater installed at the bottom of the storage tank. The temperature of the ammonium aqueous solution is 140°C;

[0050] (2) Open air compressor, make its outlet pressure be 0.3Mpa, compressed air enters in the ammonium nitrate aqueous solution by being located at the air distributor inside storage tank after drying, degreasing, it is stirred;

[0051] (3) Start the circulating delivery pump located at the outlet of the storage tank, and mix the ammonium nitrate aqueous solution for 15 minutes by self-circulation;

[0052] (4) Sampling and analyzing the PH va...

Embodiment 3

[0054] Such as figure 1 As shown, a control device for realizing the pH value of the above-mentioned finished ammonium nitrate aqueous solution includes a storage tank 6, and an air distributor 8 is arranged horizontally in the middle of the storage tank 6, and the air distributor 8 passes through the first pipeline 12-1 and is located in the storage tank. The air compressor 2 outside the tank 6 is connected, and the first pipeline 12-1 is connected with an acid-base tank 5 for adjusting the pH value; the outlet end at the bottom of the storage tank 6 is connected with a circulation delivery pump 10, and the outlet of the circulation delivery pump 10 The end communicates with the upper end of the storage tank 6 through the second pipeline 12-2, and the outlet end of the second pipeline 12-2 is located at the middle and upper part of the storage tank 6.

[0055] Further, in order to improve the cleanliness of the compressed air and avoid the impact on the ammonium nitrate aqueo...

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Abstract

The invention provides a method for controlling the pH value of the finished ammonium nitrate aqueous solution, which includes adjusting the temperature and pressure of the ammonium nitrate aqueous solution in a storage tank; stirring with compressed air; circulating pumps for self-circulation mixing; calculating and adding acid or lye according to the pH value Adjust the pH to it. The present invention also provides a control device, including a storage tank, an air distributor is horizontally arranged in the middle of the storage tank, and the air distributor is connected with an air compressor arranged outside the storage tank through a first pipeline, and the first The pipeline is connected with an acid-base tank for adjusting the pH value; the outlet end at the bottom of the storage tank is connected with a circulation delivery pump, and the outlet end of the circulation delivery pump communicates with the upper end of the storage tank through a second pipeline, and the second pipeline The outlet end of the tank is located in the middle and upper part of the storage tank. The invention accurately and quickly controls the pH value of the ammonium nitrate aqueous solution to meet the use requirements and ensure its safety during use.

Description

technical field [0001] The invention relates to the technical field of ammonium nitrate aqueous solution, in particular to a method and a device for controlling the pH value of a finished ammonium nitrate aqueous solution. Background technique [0002] Because the ammonium nitrate aqueous solution can greatly reduce the amount of steam used in the production process, ensure the safety of the product during the transportation process, reduce the labor cost of the production enterprise, and realize the intrinsic safety of chemical production. As an environmentally friendly product, it has been highly recognized by the relevant state ministries and commissions. The Ministry of Industry and Information Technology officially listed liquid ammonium nitrate products in the "Twelfth Five-Year Plan Development Plan for China's Civil Explosive Equipment Industry", and vigorously promoted them as new products in the civil explosive equipment industry. With the advancement of technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B31/28
Inventor 孙虎
Owner ANHUI WANBEI COAL REFCO GRP LTD HANSHAN HENGTAI NONMETALLIC MATERIALS BRANCH
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