transform desulfurization tower

Product Description

The transform desulfurization tower is a critical equipment in coal chemical, synthetic ammonia, and natural gas purification processes. It is primarily used to remove sulfides (such as H₂S and COS) from gases (e.g., shift gas, synthesis gas, coal gas), while adjusting gas components (e.g., converting CO to CO₂) as required by the process. Through chemical reactions and mass transfer processes within the tower, it achieves gas purification and component optimization, meeting the stringent requirements of subsequent processes for gas purity (e.g., sulfur content ≤1ppm), and reducing corrosion of equipment by sulfides and environmental pollution.

Structural Design

(1) Tower Body Structure

• Materials:
  • The main body is made of pressure vessel steel such as Q345R and 16MnDR, lined with stainless steel (316L) or corrosion-resistant alloys (e.g., Hastelloy), suitable for high-temperature, high-pressure 工况 with sulfur-containing media.
  • Internal components (packing, trays, distributors) are selected from 316L, 2205 duplex steel, or non-metallic corrosion-resistant materials (e.g., polypropylene, ceramics) based on medium characteristics.
• Structural Forms:
  • Packed Tower: Uses structured packing (e.g., metal perforated plate corrugated packing) or random packing (e.g., Pall rings, cascade rings) with a large specific surface area (125~500m²/m³), high mass transfer efficiency, and low pressure drop (≤500Pa/m).
  • Trayed Tower: Adopts float valve trays, sieve trays, or bubble cap trays, featuring large operational elasticity (stable operation under ±30% load fluctuations), suitable for large processing capacities and easily plugged conditions.

(2) Key Internal Component Design

• Gas Distributor:
  Radial distributors or coil-type distributors are used to ensure uniform upward gas flow and avoid desulfurization efficiency degradation caused by flow maldistribution.
• Liquid Spraying System:
  Multi-stage nozzles (e.g., spiral nozzles, fan-shaped nozzles) are combined with liquid redistributors, with a spraying density ≥5m³/(m²·h) to ensure full gas-liquid contact.
• Demisting Device:
  Wire mesh demisters or baffle demisters are installed at the top, with a mist droplet capture efficiency ≥99%, preventing liquid entrainment from affecting subsequent processes.

Application Scenarios

1. Coal Chemical Industry:
   Desulfurization of shift gas after coal gasification (e.g., Texaco gasification, coal water slurry gasification processes), removing H₂S and COS to provide clean gas sources for subsequent methanol synthesis and ammonia synthesis.
2. Natural Gas Purification:
   Removing acidic gases (H₂S, CO₂) from natural gas to meet pipeline transportation standards (sulfur content ≤4ppm) or LNG production requirements.
3. Metallurgy and Environmental Protection:
   Desulfurization of coal gas in the steel industry (e.g., coke oven gas, blast furnace gas) to reduce SO₂ emissions; desulfurization and purification of landfill gas to produce biomethane (BNG).
4. Chemical Synthesis:
   Integrated medium-temperature conversion (CO+H₂O→CO₂+H₂) and desulfurization of synthesis gas to provide raw materials for hydrogen fuel cells and electronic-grade high-purity hydrogen production.

Product Display

transform desulfurization tower

transform desulfurization tower

transform desulfurization tower

transform desulfurization tower