Why is liquid ammonia stored in spherical tanks? Does the liquid level of the liquid ammonia spheric

Generally, the liquid will hit the tank in the process of transportation, which will produce static electricity, and it is not easy to generate static electricity with a round filling without edges, which improves safety.

When the storage capacity is large, the cost of spherical tanks with the same storage and pressure is lower than that of horizontal tanks, and the difference between management and inspection costs is not large. And the footprint of the spherical tank is also smaller than that of the horizontal tank. Vertical tanks are not suitable for liquid ammonia storage (excessive static pressure at the bottom).

In the tank group of liquefied hydrocarbons, combustible gases and combustible gases, the fire spacing of the storage tanks shall not be less than the provisions of the table.

Fire spacing of storage tanks in tank groups of liquefied hydrocarbons, combustible gases, and combustible gases Table omitted):

Among them: when the liquefied hydrocarbon spherical tank has accident discharge measures, the fire spacing between the spherical tanks is multiple of the tank diameter; The fire spacing for accident-free discharge measures is the diameter of the tank.

There are no edges inside! It is not easy to generate static electricity.

It is indeed not easy to generate static electricity! ^

Hello, liquid ammonia spherical tank backup tank needs liquid level. The liquid ammonia spherical tank is a container used to store liquid ammonia, and the backup tank is designed to be able to quickly switch to the backup tank in the event of a problem with the main tank, ensuring the continuity of production. If there is no liquid level monitoring in the backup tank, Nai Tan will not be able to detect the delay in the drop of the liquid level hood or the high liquid level in time, which may cause the backup tank to fail to work normally and affect production.

Therefore, in order to ensure the safe operation of the standby tank, it is necessary to install a liquid level monitoring device on the standby tank to monitor the change of liquid level in time to ensure that the storage capacity and pressure of ammonia in the standby tank are in a normal state.

Thank you for your patience, liquid ammonia spherical tank backup tanks usually do not require level measurement. A spare tank is used as a replacement for a master tank for a temporary replacement in the event of master tank maintenance, filling, or other situations. The aim is to ensure that the system can continue to function properly if the main tank is unusable.

Backup tanks are generally filled with liquid ammonia and are connected by valves and piping to the system for switching when needed. Level measurement is usually not necessary on a back-up tank, as the purpose of a back-up tank is to provide continuous** and a level sensor or control system is often used to monitor the level of the main tank. However, the specific application scenarios of the wheel may be different from each other.

In some special cases, it may be necessary to install a level measurement device on the spare tank in order to better monitor the condition of the backup tank. Therefore, I recommend that you refer to the relevant design codes, safety requirements or consult a professional engineer to determine if level measurement on a backup tank is required for your specific application.

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The spare tank of liquid ammonia spherical tank is used when the original spherical tank fails, such as ammonia leakage or pipeline leakage, etc., and the ammonia liquid is pumped out of the original spherical tank and loaded into the spare tank for repair and maintenance. Therefore, liquid level detection is required in the backup tank of the liquid ammonia spherical tank. The [star] level is used to check the amount of liquid ammonia stored and ensure that the spherical tank is filled with enough liquid ammonia for the spare tank to be packed when needed.

If there is no level spike monitor in the backup tank, the storage and use of liquid ammonia cannot be effectively realized, which may lead to unstable operation of the equipment or a pure failure. Therefore, it is necessary to use an appropriate level monitoring device, such as an ultrasonic level gauge or a classic float level gauge, to monitor the level of the backup tank. In general, in the liquid ammonia spherical tank backup tank, liquid level monitoring is a very necessary operation, which can ensure the normal use of the backup tank and ensure the safety and stability of the operation of the spherical tank.

Summary. What is the use and method of liquid ammonia storage tank, today liquid ammonia storage tank manufacturers will explain to you, liquid ammonia storage tank is a pressure storage tank he is more suitable for petroleum, chemical, grain and oil, food, fire protection, transportation, metallurgy, national defense and other industries, important basic equipment, our economic life is always inseparable from large and small anti-corrosion storage tanks, anti-corrosion storage tanks play an important role in the development of the national economy. For many enterprises, normal production cannot be achieved without storage tanks, especially the national strategic material reserves are inseparable from liquid ammonia storage tanks of various capacities and types.

Hello, what does the liquid ammonia storage tank medium mean, you can check the content, oh dear.

As a special pressure vessel, the liquid ammonia storage tank is a container for storing liquid ammonia and other media, and is often used in the transportation of strong acid and alkali products.

What is the use and method of liquid ammonia storage tank, today liquid ammonia storage tank manufacturers will explain to you, liquid ammonia storage tank is a pressure storage tank he is more suitable for petroleum, chemical, grain and oil, food, fire protection, transportation, metallurgy, national defense and other industries, important cover of basic equipment, our economic life is always inseparable from large and small anti-corrosion storage tanks, anti-corrosion storage tanks play an important role in the development of the national economy. For many enterprises, normal production cannot be achieved without storage tanks, especially the national strategic material reserves are inseparable from liquid ammonia storage tanks of various capacities and types.

Liquid ammonia is mainly used in the production of nitric acid, urea and other chemical fertilizers, and can also be used as a raw material for medicines and pesticides. It can be used as an ammoniation raw material for organic chemical products, and can also be used as a refrigerant to decompose ammonia into hydrogen and nitrogen mixed gas, which is a good shielding gas, which can be widely used in the semiconductor industry, metallurgical industry and other stool industries and scientific research that need to protect the atmosphere.

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Summary. )

r = spherical tank radius.

h = level height.

If you want to calculate the tonnage of liquid ammonia, you can multiply it by the density of liquid ammonia at different temperatures.

How to calculate the volume of liquid ammonia spherical tank at any liquid level?

r=radius of spherical tank h=liquid level height If you want to calculate the tonnage of liquid ammonia, the vertical resistance is multiplied by the density of liquid ammonia at different temperatures.

That's not right. I'll do the math.

Good. Hello, there is an error in the formula I just posted.

Well. 3 times the radius of the spherical tank x = the height of the liquid.

That is, to put. It should be this formula.

Have you counted? Wait a minute.

Hello I tried it, and the result was similar to what you gave above.

The integer part is 192

If you don't think so, I'll help you find the formula.

(1) Material selection. It has been proven that the higher the strength of the material, the greater the likelihood of stress corrosion. However, the minimum strength limit without stress corrosion is related to the content and characteristics of impurities, the size of stress, and the operating speed.

In order to prevent stress corrosion, steel with low strength should be selected as much as possible, taking into account the operating pressure, residual stress, safety and economy.

2) Adopt reasonable structure and welding process. In the structure, stress concentration caused by too many welds, too concentrated, asymmetrical welds, weld crossings and unreasonable welding sequences should be avoided. During manufacturing, strong assembly welding should be avoided to prevent defects such as undercut and wrong edge, and ensure that the surface in contact with the medium is as smooth as possible.

After manufacturing, annealing heat treatment should be carried out to remove residual thermal stress after welding. Proper post-weld heat treatment can greatly reduce residual stresses during the manufacturing process and can reduce the peak hardness of the weld heat-affected zone.

3) For the new storage tank before it is put into use, the air inside should be completely removed; During the process of filling, discharging and maintenance, certain measures are taken to avoid bringing in any air. For large storage tanks, ammonia vapor should be condensed continuously, and most of the non-condensable gas is air, which should be discharged. For smaller equipment, the air inside the tank is removed by extraction or transpiration.

In short, eliminating air pollution inside the storage tank can effectively prevent stress corrosion.

4) The newly put into use storage tank shall be inspected internally and externally according to the regulations and periodic periodic inspection. The corrosion-prone parts such as liquid and gas phase interfaces, leading arcs and T-joints should be inspected; 100% magnetic particle or ultrasonic flaw testing should be performed on all welds below the liquid level, and 100% magnetic particle testing should be performed on all welds if conditions permit. Cracks detected should be evaluated.

Because the fracture toughness of the stress corrosion limit JISCC is only about 1 0 25 of the conventional fracture toughness of the material D0105, the safety level of the crack should be evaluated according to the fracture mechanics criterion, and the treatment opinions and the next inspection time should be given. For shallow cracks with a wall thickness of no more than 1 0 24 and a depth of less than 4mm, the method of grinding can be used for mechanical elimination, but the grinding process should be strictly controlled; For deeper cracks, grinding is carried out before repair welding. Before repair welding, it should be preheated and heated to prevent welding hardening, and low-hydrogen electrodes should be used during welding, and flaw detection should be reviewed after welding, and stress relief treatment should be carried out.

5) Regularly test the concentration and moisture content of liquid ammonia, and if the moisture is found to be lower than the critical concentration, the water should be replenished in time, so that the moisture content is always maintained in the range of 012% 1%. In addition, other inhibitors can also be added, such as adding 100lg 0 2g of refrigeration oil or 5lg 0 2g of rapeseed oil or 10 50lg of 0 2g silicone oil as stress corrosion inhibitors, which can effectively inhibit stress corrosion caused by liquid ammonia.