Introduction to the Production Base

Material Processing Procedures and Services

Jiangxi Xuanding is a company specializing in the research, development, production, and sales of new materials for environmental protection. Its core focus areas include desulfurization agents, ammonia-free denitrification agents, calcium-based ultrafine powder (as a substitute for sodium bicarbonate), flue gas denitrification catalysts, and other related products.

To better meet customer needs—especially the demand for large quantities of desulfurization agents and other environmental protection materials in a short timeframe—and to realize full-process services including EPC (Engineering, Procurement, and Construction), core environmental material supply, by-product recovery, and operation & maintenance, Xuanding has established a production line in Fuliang with an annual capacity of over 100,000 tons for desulfurization and ammonia-free denitrification agents.

The material production base, supported by Xuanding Group and its in-house R&D team, provides comprehensive process solutions tailored to various end-user working conditions. By aligning with the process route, Xuanding offers targeted professional materials to help users achieve environmental compliance while optimizing both investment and operational costs.

Based on the above, we offer the following services:

▲ With the integration of our industrial furnace and environmental protection divisions, we provide EPC services for fixed-bed dry desulfurization and denitrification projects;
▲ Backed by our in-house processing bases, we offer supply services for desulfurization agents and other environmental materials;
▲ We provide technical consulting and retrofit services for existing projects to assist steel enterprises in achieving compliant emissions.

Desulfurization Agent Specifications

• The desulfurization agent uses calcium hydroxide as the base material, supplemented by active components. During production, the sulfur content in actual flue gas should be considered to ensure an optimal balance between the agent’s strength and reactivity/efficiency;
• The production process includes dry mixing, wet mixing, extrusion molding, and drying (which may include foaming);
• The dry and wet mixing stages must ensure uniform blending;
• The extrusion process should maintain proper pressure control to tailor the product’s strength to meet specific operational conditions;
• After drying, the material must be free of free water to ensure efficiency;
• The final product should undergo simulated flue gas performance testing before leaving the factory to ensure reliability in actual use;

Learn more about us,Please visit:

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https://shprimetech.com/

Shanghai Xuanding Group 
Jiangxi Xuanding Desulfurization and Denitrification Agent Production and Processing Base

Shanghai Xuanding Group，as a high-tech enterprise in Shanghai, is a professional, refined, characteristic and novel enterprise enterprise;
The group consists of Nanjing Xuanding, Anshan Xuanding, Jiangxi Xuanding, and Shanghai Prime and also has smelting division, furnace division, environmental protection division, and international division;
(Among them, Shanghai Prime Metallurgy Technology Co., Ltd. is an import and export trading company, and Jiangxi Xuanding Environmental Technology Co Ltd. is our production base;)

Have Class B design for air pollution control and Class B general contracting for environmental protection projects;

Have invention patents for the production of desulfurizers, invention patents for performance testing of desulfurizer, and other utility model patents related to furnaces and kilns, regenerative combustion, gas emission reduction, flue gas desulfurization and denitrification;

In addition to the general contracting of various types of kiln projects, we have so far more than 100 blast furnace cases of gas emission reduction, such as even pressure recovery of blast furnace gas, recovery of recuperative air, zero-discharge, etc., and more than 50 furnace cases of calcium-based fixed-bed dry desulfurization, calcium-based dry desulfurization of ultrafine powder, desulfurization and denitrification integration and other flue gas treatment;

In order to better realize the general contracting of engineering projects, production and supply of core environmental protection materials, by-product recycling, operation and maintenance, and other full-process services, it has an annual output of more than 100,000 tons of desulfurization agent/non-ammonia denitrification agent production line in Fuliang;

Shanghai Xuanding Group is always committed to technological innovation in the fields of furnaces and environmental protection, always adhering to the "customer-centered" business philosophy, and is willing to provide customers with the best quality service and the most suitable products;

To learn more about our projects and products ,Please visit ：

https://shprimetech.com/

https://shanghaiprimeme.en.made-in-china.com/

The Application of Ammonia-free Denitrification Technology Across Multiple Industries and its Effective Replacement of SCR

Introduction to Ammonia-Free Denitrification Technology

Process Description

The desulfurization agents and ammonia-free catalysts used in the desulfurization and denitrification processes are all based on calcium hydroxide (Ca(OH)₂) as the substrate, with manganese-based or manganese-copper-based materials serving as catalysts. They are processed into cylindrical pellets through mixing, stirring, extrusion, and drying steps.

Generally speaking, for customers undertaking a completely new denitrification project (or those with an existing fixed-bed desulfurization system):

A fixed-bed dry denitrification reactor can be installed (or ammonia-free denitrification agents can be directly filled into the existing fixed-bed desulfurization reactor), with no need for an additional dust removal system, as the fixed bed formed by the ammonia-free denitrification pellets inherently provides dust suppression and removal functions based on the principle of a granular filtration layer.

When calcium hydroxide reacts with nitrogen dioxide, it produces calcium nitrate (Ca(NO₃)₂) and water (H₂O).
The chemical reaction can be expressed as:
Ca(OH)₂ + 2NO₂ → Ca(NO₃)₂ + H₂O

This reaction is a typical acid-base neutralization reaction, in which calcium hydroxide acts as the base, and nitrogen dioxide (which forms nitric acid when dissolved in water) acts as the acid.
The entire process uses no water and produces no wastewater. The operation is simple and easy to control.

Based on the difference in flow direction between the flue gas and the downward movement of the solid granular material, fixed-bed integrated desulfurization and denitrification devices are classified into axial-flow and radial-flow types.

In an axial-flow fixed-bed dry denitrification system, the flue gas flows upward from the bottom to the top of the fixed-bed reactor, while the ammonia-free denitrification agent descends from the top under the force of gravity. The agent and flue gas come into countercurrent contact.

In a radial-flow fixed-bed dry denitrification system, the flue gas flows from the inner side to the outer side of the reactor, while the ammonia-free denitrification agent descends from the top under gravity. The agent and flue gas come into crossflow contact.

Advantages and Features of Calcium-Based Fixed-Bed Dry Desulfurization and Denitrification Integration

▲ Low initial investment;
▲ Low operating costs; The calcium-based fixed-bed dry method has relatively low overall resistance loss, resulting in low power consumption (electricity consumption) and no need for heating (ammonia-free denitrification requires low temperature increase), which reduces or eliminates the need for fuel media;
▲ Small footprint, especially suitable for sites with limited space or irregular areas;
▲ The calcium sulfate produced by the calcium-based fixed-bed dry method (desulfurization) is a solid waste that can be recycled by our company;
▲ The calcium nitrate produced by the calcium-based fixed-bed dry method (denitrification) is a solid waste that can be recycled by our company;
▲ The calcium-based fixed-bed dry method system requires almost no maintenance, does not need additional workers, and is easy and simple to repair and maintain;

What is even more noteworthy:

▲ The calcium-based fixed-bed can simultaneously achieve both desulfurization and denitrification functions. For projects that require phased construction, space can be reserved inside the tower for filling desulfurization or denitrification agents later. If desulfurization or denitrification functionality needs to be added in the future, there is no need for renovations, no shutdown, and no new equipment installation—simply add the desulfurization or denitrification agents online;
▲ All by-products of the calcium-based fixed-bed are solid waste, which is easier to handle compared to sodium salts from sodium bicarbonate desulfurization or the hazardous waste catalysts from SCR denitrification. Moreover, our company can take responsibility for recycling, relieving the client of future concerns.

▲ As a component of the calcium-based fixed-bed dry desulfurization and denitrification integration, ammonia-free denitrification completely eliminates the use of ammonia, addressing the complexities and risks associated with the transportation, storage, and delivery of ammonia water as a hazardous material;

To learn more about our projects and products ,Please visit ：

https://shprimetech.com/

https://shanghaiprimeme.en.made-in-china.com/