Comparison of LD series adsorption dryers with traditional double tower dryers

First. Shallow LD series:

1. High-strength die-casting/extruded aluminum alloy structure, through special oxidation and surface dry powder spraying double-layer anti-corrosion treatment, complete anti-corrosion, long service life.

2. Modular combination structure, simple, light weight, small size, disassembly, flexible installation, convenient and small footprint, only a quarter of the traditional type.

3. Cyclone filling, the adsorbent distribution is consistent, and the maximum filling density can be reached; The air flow is uniform and free of wear and dust as it passes through the adsorption bed, ensuring compressed air with a stable dew point.

4. Using cyclone type filling, combined with efficient modular structure design, the adsorbent can be used continuously for 3-5 years without replacement or addition; In addition, the amount of adsorbent is only one-third of the traditional formula.

5. The pressure drop of the system is the smallest, and the pressure drop before and after the dryer is only 0.14barg.

6. The adsorbent is uniform and dense without mutual movement and friction to form dust, prolongs the service life of the dust removal filter, ensures the provision of clean compressed air, and saves costs.

7. High-quality aluminum alloy two-way air valve, simple structure, good sealing, high action reliability, no need to replace for life (except seals), greatly reducing maintenance costs.

8. N+1 can achieve 100% standby effect, low cost.

9. Simple system expansion. When it is necessary to increase the equipment due to the increase in gas consumption, only one unit group needs to be added.

10. The minimum moving parts, convenient and simple maintenance, the overall bolt-fixed structure is easy to operate, and single operation can be completed.

Second, the double tower type

1. Ordinary carbon steel, the inner surface is easily corroded by humid hot compressed air, and the production of rust residue will pollute the downstream air; The outer surface is susceptible to corrosion in undesirable environments.

2. Carbon steel double-tower welded structure, complex, bulky, bulky, difficult to disassemble and install, and occupy a large area and space.

3. Using manual filling, filling is not satisfactory, loose, easy to produce tunnel (channelization) effect, adsorbent produces serious friction pulverization, resulting in uneven adsorption, unstable, dew point fluctuations in a large range.

4. The amount of filling required for the adsorbent of the traditional dryer is large. And due to the defect of the filling method, it is added every year. The life of the adsorbent is shortened by the oversaturation of compressed air tunneling (channelization), about 1-2 years.

5. The system pressure drop is generally above 0.35barg, and the maximum can reach 1.0barg, which increases the load and operating cost of the air compressor. Such large pressure drops arise from structural reasons such as complex piping, valves, and sudden changes in the flow area of the tower and connecting pipes.

6. The adsorbent is constantly moving to produce dust, so that the post-dust filter is quickly blocked, the pressure drop is large, and it is easy to penetrate and cause dust pollution to flow, increasing operating costs.

7. Use traditional butterfly valves or poppet valves, and the number is large, the sealing is poor, it is easy to leak or jam, and the failure rate is high.

8. To achieve 100% standby effect, it is necessary to increase the cost by 100%.

9. The system expansion is complex and the workload is large, which needs to be redesigned and installed.

10. The failure rate of the switching valve is high, the amount of adsorbent is large, and the dimension