The use of nitrogen production equipment can save the enterprise a considerable cost. Use it early and save it!!!

Calculated by using requirements of 30Nm3/h and nitrogen purity of 99.999% for nitrogen production project

1. The operating cost of bottle nitrogen. Generally, the price of nitrogen with a purity of 99.999% on the market is 50 yuan/bottle. The standard volume of a bottle of nitrogen is 40 liters under a pressure of 12Mpa. In fact, each bottle is only about 5M3. The price of ordinary nitrogen per cubic meter is about 10 yuan. This gas consumption method is only suitable for users with very small gas consumption.

Cost of using cylinder nitrogen: 30Nm3/h×10 yuan=300 yuan/hour Annual usage cost: 300×8000 hours/year=2.4 million yuan/year

2. The operating cost of liquid nitrogen. The price of liquid nitrogen with a purity of 99.999% in the market is 1500 yuan/ton. One ton of liquid nitrogen can be vaporized to get about 600 cubic meters of gaseous nitrogen, and the price of nitrogen per cubic meter is about 2.5 yuan.

   (Excluding the liquid nitrogen storage grains, vaporizers, annual maintenance and labor costs invested in advance)

The cost of using liquid nitrogen: 30Nm3/h×2.5 yuan=75 yuan/hour Annual use cost: 75×8000 hours/year=600,000 yuan/year

3. The operating cost of on-site nitrogen production (calculated based on your company's nitrogen production project of 30Nm3/h) The operating cost of the system is mainly composed of the following aspects:

1. Electricity consumption 2. Labor 3. Equipment maintenance costs 4. Equipment depreciation

The power consumption mainly comes from the following aspects:

Air compressor : The rated power of the air compressor is 15kw. When the system is selected, the unloading of the air compressor and the appropriate compressed air margin are considered, so the actual power consumption of the air compressor is about 60% of the rated power, which is: Around 9kw.

Freeze dryer: The rated power of the freeze dryer is 0.58kw.

Nitrogen generator: The raw material of the nitrogen generator is compressed air, and the nitrogen generator itself basically does not consume electricity, it mainly uses electricity for meters, and the rated power is about 0.6kw.

Nitrogen purification power: power 6Kw

Based on the above, the power consumption of the entire nitrogen production system is: 17kw. Assuming that the electricity fee is 0.7 yuan/kwh, then the electricity consumption per hour is 17×0.7=12 yuan converted into the electricity consumption per cubic meter of finished nitrogen: 12÷30=0.4 yuan

Usage fee: 30Nm3/h×0.4 yuan = 12 yuan/hour (electricity fee) Annual usage fee: 12×8000 hours/year = 96,000 yuan/year (electricity fee)

Labor cost: Because the equipment does not require special personnel, only regular and irregular inspections are required, so when calculating the operating cost of the gas production equipment, the labor cost can be calculated at 20 yuan per day.

Equipment maintenance and maintenance costs: The maintenance and maintenance costs of the whole machine are mainly reflected in:

Air compressor air filter element: Replace every 4000 hours Unit price: 445 yuan/piece

Oil and gas filter element: Replace every 8000 hours Unit price: 480 yuan/piece

Oil filter element: Replace every 2000 hours, unit price: 346 yuan/piece

Lubricating oil: change once every 2000 hours, unit price: 350 yuan/time

The three-stage filter of compressed air filter C, T, A is replaced every 4000 hours: 600/3 only

Nitrogen generator: oxygen analyzer probe: replace every two years, unit price: 580 yuan/piece

Nitrogen purification: The whole equipment does not need to replace parts and only needs to check the stability of each part frequently.

Depreciation of equipment: the depreciation period of equipment is ten years

4. The total investment of the 5N-30Nm3/h nitrogen production system is 172,400 yuan (including screw air compressor system)

1). The cost of using cylinder nitrogen: 30Nm3/h×10 yuan = 300 yuan/hour. Annual use cost: 300×8000 hours/year=2.4 million yuan/year (excluding the busbar equipment and pressure reducing valve and Manual operation cost)

2). The cost of using liquid nitrogen: 30Nm3/h×2.5 yuan=75 yuan/hour. Annual use cost: 75×8000 hours/year=600,000 yuan/year (not including the liquid nitrogen tanks, vaporizers, and busbars that were invested in advance) Equipment and pressure reducing valve and manual operation costs)

3) The cost of the nitrogen generation system: electricity fee + labor fee + equipment maintenance fee + equipment depreciation fee Annual usage fee: 96000 yuan/year (electricity fee) + 7200 yuan/year (labor fee) + 2830 yuan/year (maintenance) Maintenance fee)

       +18,000 yuan/year (depreciation expense) = 124,000 yuan/year usage fee

4). Annual use of cylinder nitrogen fee: 2.4 million yuan/year

       Annual use of liquid nitrogen fee: 600,000 yuan/year

       Annual use of nitrogen generator: 124,000 yuan/year