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Prime Tech visited and investigated many steel companies and collected first-hand gas sampling data
According to customer needs, Shanghai Xuanding can also provide customers with customized services, mobile pilot systems, and provide on-site testing and on-site pilot services.
After laboratory tests, on-site pilot tests, performance evaluations and other measures, combined with the excellent performance of the cases that have been put into production, Xuanding launched the "Blast Furnace Gas Catalytic Absorption Multi-stage Desulfurization Process Technology".
Impurity Removal
This scheme uses a hydrolysis desulfurization process to remove COS. The blast furnace gas from the bag dust removal first passes through a protective reactor to remove harmful impurities in the gas.
The gas flows radially in the reactor, thereby reducing the pressure drop of the reactor.
Hydrolysis
The blast furnace gas after impurity removal enters the COS hydrolysis reactor, thereby hydrolyzing the COS in the gas into H2S. The gas flows radially in the reactor, thereby
reducing the pressure drop of the reactor. The blast furnace gas after hydrolysis goes to the H2S removal system.
Desulfurization
The H2S removal system can be carried out in the following ways:
Method 1 wet H2S removal
The blast furnace gas after TRT enters from the lower part of the desulfurization tower. In the desulfurization tower, the gas contacts the desulfurization liquid in countercurrent, and the hydrogen sulfide in the gas is absorbed. The gas that removes hydrogen sulfide
passes the upper separation layer to initially capture the mist desulfurization liquid, and the qualified clean gas is sent to the clean gas main pipe for supply to the gas cabinet or end user.
Method 2 Removal of H2S by activated carbon adsorption
Activated carbon is arranged inside the adsorption tower, and the reactor adopts radial flow, with advanced design, top loading and adsorbent discharge at the bottom.
Process Flow Chart
TRT Hydrolysis Process (Carbonyl Sulfide Conversion)
(1) Dry impurity removal is adopted, and no waste liquid is discharged.
The protective agent has a wide range of operating temperatures, up to 350ºC, high impurity removal accuracy, large working capacity, and can remove trace HCN to prevent hydrolysis catalyst poisoning.
(2) In view of the high COS content in blast furnace gas, this scheme adopts hydrolysis desulfurization process, and the COS removal rate of hydrolysis desulfurization is greater than 95% (the COS conversion rate can be controlled).
(3) The reactor adopts radial flow and advanced design. The resistance of a single reactor is less than 3kPa, top loading and catalyst discharge at the bottom. It can effectively reduce the pressure drop of coal gas through the reactor bed, and the catalyst utilization rate is high.
(4) Make full use of the temperature and system pressure before TRT to avoid the hot and cold disease of hydrolysis after TRT, which requires cooling and dehydration and then heating and hydrolysis. At the same time, it can reduce the catalyst bed flow rate, reduce pressure drop loss, and save energy consumption. (5) The device occupies a small area and requires little investment, so no additional construction land is required. The device has high operating stability and reliability.
(6) The device has low production and maintenance costs, and no additional operators are required.
TRT Desulfurization Process (Wet Desulfurization/Activated Carbon Adsorption)
Wet desulfurization:
(1) The wet desulfurization process is mature, the technology is reliable, the operation is stable, and the device can be designed according to different processing scales, especially suitable for large-scale coal gas desulfurization projects.
(2) The equipment has large operating flexibility and strong adaptability to gas volume fluctuations and HzS concentration changes.
(3) The desulfurization efficiency is generally higher than 95%, and the solution ratio and control operating parameters can be adjusted according to needs to achieve different desulfurization effects to meet different
gas requirements.
(4) The process flow is long, the equipment is large, the process technology level is high, the device investment is high, the equipment maintenance volume is large, the power consumption is large, but the raw and auxiliary material consumption is low.
Activated carbon adsorption:
(1) The activated carbon adsorption process is mature and is widely used as an adsorption medium in the desulfurization and denitrification industry.
(2) The activated carbon adsorbent has a high sulfur capacity, so a small amount of activated carbon can meet the adsorption effect, reducing investment and operating costs.
(3) The process is simple, occupies a small area, has low investment, and generates no solid waste (the saturated activated carbon is sent for sintering and used as fuel, and on-site operability needs to be confirmed).
Comparison with other Process Forms
| Process route | Pre-hydrolysis treatment to thicken the end carbon adsorption | COS hydrolysis + sodium carbonate wet spraying | Nanomaterial adsorption (regeneration) | Microcrystal adsorption (regeneration) | Terminal desulfurization | ||
| Production scale (excluding production consumables) | Low | Middle | High | High | high(More) | ||
| Consumables (including power consumption) | Low | Low | High | High | Middle | ||
| Comprehensive operating cost | Low | Low | High | High | Middle | ||
| Ultra-low emissions | Satisfy | Satisfy | Satisfy | Satisfy | Satisfy | ||
| Impact on TRT pressure | Small | Middle | Small | Small | None | ||
| Number of staff | Few | Medium | Few | Few | High | ||
| Area occupied | Small | Middle | Small | Small | Big | ||
According to customer needs, Prime Tech can provide customized services for customers:
Including:
In view of the different raw material compositions of each steel enterprise, the sulfide content in blast furnace gas varies, and the gas composition can be targeted for component detection and analysis;
In order to better verify the accuracy of the process and the reliability of the materials, mobile on-site pilot services can be provided.
Pilot-Scale Equipment
Experimental Materials
Fine desulfurization of blast furnace gas source has only recently attracted widespread attention, so there are very few cases of production;
Shanghai Xuanding has always adhered to the principle of technology priority, established long-term strategic partnerships with major universities and Baosteel laboratories, and has been committed to the research and development and innovation of fine desulfurization technology and materials;
Especially in the joint development with catalyst manufacturers, there are examples of such process forms and material applications, and they have been running stably and reliably since production, with excellent indicators.
Company Profile
Vision
With dees of rapid development and accumulation, China has been perfect and mature on technology and management in various industrial areas, shaping a complete processing manufacturing industry with competitive price, well known for its excellent skill, high efficiency and hardworking team with qualification for personnel dispatching.
| Professional Professional technical and management team with abundant experience in the implementation of domestic and international projects; |
| Responsive Responsively and meticulously, translating your needs into complete solutions; |
| Integration Integrating various technologies and resources in China and fulfilling complementary advantages, by relying on professional teams; |
| Motivation Motivated to provide the optimal solution and quality products; |
| Exceptional Exceptional, delivery and,implementation of projects to meet, your expectations; |
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