For both the equipment manufacturers and the users themselves, to understand the existing basic conditions of an air pressure station house, drawing on the four steps at the heart of Chinese medicine can be well understood:

look forward to

Observe the utilization of existing air pressure station equipment

Air Compressor

Understand the types of air compressors - centrifugal, screw (oil-free/oil-injected screw;

 industrial (fixed) frequency/inverter; air/water-cooled), scroll ......

Understand the core parameters of air compressor - exhaust pressure, temperature; screw 

equipment need to pay attention to the loading and unloading time; centrifugal equipment 

need to pay attention to the current, VSD opening, emptying;

Dryer

Dryer type, container pressure and age, power consumption, gas consumption (gas 

consumption is often the largest deviation, to rely on professional testing data to assess 

rather than the nominal exhaust volume on the nameplate) and so on;

Nitrogen Maker

Nitrogen production purity, flow rate, etc;

Filter

Filtration accuracy, vessel pressure and age;

Gas storage tank

Vessel volume, temperature and pressure resistance and age;

Piping

Layout and diameter of piping.

Smell

Understand the process and needs of gas use

Which parts of the site air used for the process? As shown in the diagram above, there are paint spraying, powder spraying, instrumentation, welding and other air processes; the second step mapping the process route for the compressed air requirements: such as pressure; water, dust, oil content; temperature; material; nitrogen purity and so on.

Ask

Ask about existing gas pain points and learn about gas usage patterns

What is troubling the existing air pressure station configuration in terms of flow, pressure, water, oil and dust? It is more common to see capacity expansion, where flow and pressure are stretched, but what is the current annual electricity and gas consumption of the station? What is the average unit price of electricity in the plant? How is the plant's electricity billing method? Peak and valley electricity price situation, etc.

What is the level of supervision of existing air pressure stations?

The development from low to high can be broadly divided into: local control - DCS 

centralized control - remote PC-based real-time monitoring - digital twin, intelligent 

operation and maintenance.

Cut

Taking the pulse of existing station gas quality and energy efficiency

Electricity consumption (kW/(m³/min)): the amount of electricity consumed by the compressed air station per unit volume of compressed air output (suction state of the compressor unit). According to the type of air can also be divided into freeze-drying compressed air, adsorption drying compressed air, nitrogen and other different process air accounting costs separately.

For example, there are two 250kw industrial frequency air compressors on site, the site is configured with a cold dryer and micro-heat suction dryer, through the detection of suction dryer outlet average flow rate of 55m³/min, the average running energy consumption of the main equipment of the air compressor station totals 530kw, then the station power unit consumption of 530/55=9.64kw/( m³/min).

On this basis, combined with the average unit cost of electricity on site, the unit cost of electricity can be further accounted for ($/m³).

Taking the average unit price of electricity 0.8 yuan/kWH as an example, the total air pressure station house in the previous example is 9.64kw/(m³/min) × 0.8 yuan/kWH ÷ 60min/H = 0.13 yuan/ m³.

We can also take into account the expenditure on maintenance, labor costs, equipment depreciation for ten years, these expenditures are equally divided into the cost of each m³ of gas can be more accurately assessed the expenditures of the air pressure station room system and the true cost of gas consumption.

*The above is the peak and valley tariffs for industrial electricity in Zhejiang Province.

(Peak and valley electricity price difference is large, it is necessary to cut peaks and fill valleys)

In fact, more refined management needs to be implemented to the peak, peak, valley electricity consumption and different electricity settlement unit price to calculate. Our operation and maintenance equipment can also be used to cut peaks and fill in the valley of the control means, in the case of maximizing power savings and then do the valley power billing.

Concluding remarks

Now the industry is also actively promoting the primary energy efficiency air pressure 

station.

From the point of view of equipment manufacturers, we welcome the first-class 

energy-efficient air pressure station. Because this is a good way to drive out the bad 

money, the dryer is the core energy-saving link.

From the point of view of operation and maintenance, we will pay attention to the fact that the first-class energy-efficient air pressure station can reflect that the station has energy-saving hardware strength. However, the user site operating conditions and needs are complex and variable, and the evaluation of the energy-efficient station is only a qualitative assessment of the power consumption of the air pressure station system combined with short-term monitoring of performance. Therefore, it must be matched with system optimization and user habits in order to truly maximize energy saving and emission reduction.

Combined with the online system testing equipment, let the user use compressed air as simple and pure as using water, electricity, natural gas is the direction we should strive for, but also on-site air pressure station room fine management of the way out.

Jih-Sun will also utilize its strengths in the field of operation and maintenance to work with its partners.

Jih-Sun will also utilize its own advantages to work with its partners to

together with our partners to join in the low-carbon cause and

We will also utilize our strengths in the field of operation and maintenance to work together with our partners in the low-carbon cause.

Unity | Cooperation | Progress

- END