【Technological innovation drives industrial upgrading, while intelligent equipment safeguards green mountains and clear waters.】 

Li Zhenglai Technology (Chongqing) Co., Ltd. has been deeply engaged in the field of digitalization and intelligence of sulfuric acid. With its independently developed core technologies, it helps traditional sulfuric acid undergo a green transformation. The company's self-developed automatic condensate acid discharger has achieved large-scale successful application in 4 key subsidiaries and 6 large-scale sulfuric acid production units of Hubei Yihua Group, marking that the condensate acid discharge technology in China's sulfuric acid industry has entered a new stage of intelligence, sealing, and unmanned operation, providing a mature and reliable equipment solution for the green and intelligent production of sulfuric acid production units. 

【Face the industry's pain points and solve the environmental protection problems through technological innovation.】  

Sulfuric acid is the core basic raw material in the phosphorus chemical industry chain. During the operation of the sulfuric acid production and utilization process, key equipment such as cold and hot heat exchangers, economizers, and steam injection for waste heat recovery will continuously produce condensed acid. For a long time, the industry has generally adopted the manual regular discharge method. This traditional mode has five prominent drawbacks: high personnel operation risks, severe hot sulfuric acid splashing seriously threatening personal safety; insufficient discharge timeliness, unable to respond in real time to changes in condensed acid; difficult to meet environmental protection standards, open operations lead to the unorganized emission of a large amount of acidic smoke containing sulfur dioxide and sulfur trioxide; high labor intensity, operators need to frequently go to high-risk sites; unable to achieve intelligent control and remote monitoring, resulting in low management efficiency. 

According to industry statistics, a single sulfuric acid production unit can release approximately 7,200 cubic meters of acidic gas annually through manual condensation of acid, causing continuous pollution to the atmospheric environment within the factory and its surrounding areas. With the increasingly strict national environmental protection policies, especially the in-depth implementation of the "Yangtze River Protection" strategy, the "Comprehensive Emission Standards for Air Pollutants" have imposed strict control requirements on unorganized emissions. The sulfuric acid industry urgently needs a fundamental transformation of its technical equipment. 

Li Zhenglai Technology, based on the actual needs of the industry, focuses on the core problem of condensate acid discharge. It has successfully developed an automatic condensate acid discharger with complete independent intellectual property rights, integrating technological innovation with industrial application. This provides key equipment support for the green upgrade of sulfuric acid plants. 

【Core Technology Breakthrough: Establishing a Benchmark for Intelligent Equipment】 

Li Zhenglai Technology's condensate acid automatic discharger adopts a technical route that combines automatic liquid level detection with sealed discharge, enabling precise control and intelligent operation throughout the entire process of acid discharge. Scientific principles and precise control: The equipment uses high-precision sensors to monitor the height of the condensate acid accumulation at the bottom of the device. When the liquid level reaches the set threshold, the system automatically triggers the discharge program, safely transporting the condensate acid through a sealed pipeline to the collection system. The entire process is without open operations or gas leakage. The system uses dry compressed air as the power source. 

According to the precise calculation formula of pipe resistance and pressure, the discharge pressure is accurately set: 

P = K × ρ × g × h 

Where P represents the set discharge pressure, K is the pipe resistance coefficient, ρ is the density of the condensed acid, g is the gravitational acceleration, and h is the height of the discharge pipe. Taking an example with a discharge pipe height of 3 meters and a pipe resistance coefficient of 1.2, the calculated discharge pressure is 64.2 kPa, ensuring sufficient discharge force and stable operation. When multiple devices are connected in parallel, the system strictly follows the sequential discharge logic. 

Avoid simultaneously discharging from more than two devices to effectively prevent the reverse pressure of condensed acid from entering other tanks, ensuring the safety of the pipeline network. This equipment transforms the traditional "passive discharge" into "active control", eliminating the need for frequent visits to high-risk areas by operators. In the control room, operators can comprehensively monitor the discharge status of condensed acid, achieving a double improvement in management efficiency and safety guarantee level. 

【Large-scale application verification demonstrates the value of the equipment." 】

Hubei Yihua Group, as a key enterprise in the chemical industry of Hubei Province, has always integrated ecological civilization construction into the overall development strategy of the enterprise. It actively responds to the national strategy of "Great Protection of the Yangtze River", and takes concrete actions to practice the concept of green and low-carbon development. In recent years, the group has made forward-looking arrangements for the intelligent upgrade of sulfuric acid production facilities, and took the lead in introducing the automatic discharge technology of condensed acid. This technology has been fully applied in 4 key subsidiaries and 6 large-scale sulfuric acid production facilities, including Yihua Phosphorus Chemicals, Chu Xing Ecological Technology, Bangpu Yihua, and Songzi Fertilizer Industry, successfully forging a path of innovative development for the green, intelligent, and efficient production of sulfuric acid. During the project construction period, all facilities were designed and installed simultaneously, and the requirements of "three simultaneities" for environmental protection facilities and main projects were strictly implemented. The successful application of the automatic discharge technology of condensed acid in 6 sulfuric acid production facilities of Hubei Yihua Group has fully demonstrated the significant emission reduction effect, stable and reliable operation, and high level of intelligence of this technology. It is an effective path for achieving the green, intelligent, and efficient production of sulfuric acid. Hubei Yihua Group continuously deepens the application of technological innovation, continuously improves environmental performance and operational efficiency, and promotes green and low-carbon development with higher standards and more practical measures. It contributes the wisdom and solutions of Hubei Yihua to the transformation and upgrading of the sulfuric acid industry and makes new and greater contributions to building a beautiful Hubei and protecting the ecological environment of the Yangtze River. 

Application Implementation Overview:

After a year of continuous and stable operation, the application of the technology has achieved remarkable results, and the value of the three dimensions has been fully realized:

Environmental Benefit Dimension: Throughout the year, approximately 28,800 cubic meters of unorganized acidic gas emissions were avoided, and 175 tons of sulfuric acid were effectively recovered. The concentration of acidic gases in the factory area significantly decreased, making substantial contributions to improving the regional atmospheric environment quality and protecting the ecological environment of the Yangtze River.

Safety production dimension: Completely eliminate the risk of burns during the process of manually discharging condensed acid. Operators no longer need to perform dangerous operations in high-temperature and highly corrosive environments, significantly enhancing the level of personal safety protection. The water vapor leakage detection and early warning function of the system provides early identification of equipment hazards, offering strong technical support for the stable, long-term, and optimal operation of the facility.

Economic Benefit Dimension: 175 tons of sulfuric acid were recycled. Calculated based on the average price of 1000 yuan per ton for sulfuric acid, the profit from recycling the acid reached 175,000 yuan. In addition to the obvious advantages such as reduced environmental protection penalties, lower labor protection expenses for personnel, and enhanced corporate green image, the investment return period is significantly better than expected, achieving a virtuous cycle of environmental protection investment and economic benefits.

【Continuous innovation leads the way, empowering the industry towards a green future.】

The successful application of Li Zhenglai Technology's condensation acid automatic discharger in 6 sulfuric acid production units of Hubei Yihua Group has fully demonstrated the remarkable emission reduction effect, stable and reliable operation, and leading intelligent level of this technology. It is an effective equipment path for achieving green, intelligent, and efficient sulfuric acid production. Looking to the future, Li Zhenglai Technology will continue to deeply focus on the intelligent equipment field of the sulfuric acid industry, taking technological innovation as the core driving force, continuously optimizing product performance and expanding application scenarios, to provide more mature green and intelligent solutions for sulfuric acid enterprises. The company is willing to work together with industry colleagues to jointly promote the green and low-carbon transformation of the sulfuric acid industry, and contribute technological strength to building a beautiful China and achieving the "carbon neutrality" goal.

Focus on the sulfuric acid industry | Protecting green mountains and clear waters with technology

Li Zhenglai Technology (Chongqing) Co., Ltd. Chongqing Bishan