As a programmatic document guiding the sustainable development of the industry, the "12th Five-Year Development Plan for Sulfuric Acid Industry" proposes to accelerate the adjustment of enterprises and raw materials structure and strive to change the mode of economic growth; comprehensive and recycling sulfur resources; fully Utilize domestic and foreign resources, adhere to the diversified supply of sulfur resources, accelerate technological progress, promote energy conservation and emission reduction, and increase waste heat recovery and utilization in sulfuric acid production.
The plan clarifies four major development goals: production capacity, output, self-supply rate of sulfur resources, and energy conservation and emission reduction. In terms of production capacity, sulfuric acid production capacity is controlled within 95 million tons. In terms of output, the sulphuric acid production will reach 90 million tons by 2015. As for the sulphur resource self-sufficiency rate, the sulphur resource self-sufficiency rate is expected to reach around 60%. In respect of energy saving and emission reduction, the total amount of steam recovered from sulphuric acid production will reach 64 million tons per year, and the amount of recovered steam from pyrite-based sulphuric acid will reach 18 million tons per year. Smelt smelting and sulphuric acid will increase the number of low temperature waste heat recovery systems on 5 to 10 units. . In order to meet the new pollutant discharge standards, the sulfuric acid industry will, on the one hand, improve domestic vanadium catalysts and use both domestic and foreign catalysts to make exhaust sulfur dioxide emissions below 400 mg/m3; on the other hand, it will increase tail gas treatment facilities by 2015. % of sulfuric acid enterprises exhaust emissions standards, companies will not be out of compliance. At the same time, it is forbidden to use high-arsenic ore mines for pyrite-based acid plants without arsenic treatment facilities, and to shut down non-ferrous metallurgy plants with high levels of heavy metals and arsenic in wastewater discharges.
To ensure that these goals are met, the following measures will be taken in the next five years. One of the measures is to control the development of production capacity and accelerate the elimination of backward production capacity. In principle, no sulfuric acid and pyrite-based sulphuric acid plant will be built in the next five years. In particular, areas with severe overcapacity of sulphuric acid, such as East China, South China, and northwest, areas with sufficient supply of acid by smelting, and areas with no downstream acid products, cannot be built. Sulfuric acid plant with pyrite and sulfur as raw materials.
Environmentally controlled areas along the rivers, lakes, lakes and seas will be phased out, and pyrite-reducing acid plants with an annual output of 200,000 tons or less will be phased out. Other regions will phase out pyrite-based acid production and sulfur-based sulphuric acid plants with an annual output of 100,000 tons or less. In regions with sufficient supply of smelting acid, a batch of pyrite-based sulphuric acid and sulphur-burning acid plants with small scale, low waste heat recovery, and “three wastes†emissions are eliminated.
The second measure is to promote low-temperature heat recovery technology for large-scale acid plant. In conditional annual production of over 200,000 tons of sulfur-based sulphuric acid plant, more than 80% of plants increase the low-temperature heat recovery system, so that the utilization rate of waste heat reaches over 90%; the pyrite-based sulphuric acid production is gradually increasing after the demonstration project is successfully operated. The low-temperature heat recovery technology is promoted on medium-sized devices, and the low-temperature heat recovery technology is introduced on the basis of the use of converted medium-temperature residual heat for large copper smelting acid plants.
The third measure is to accelerate the construction of the pyrite ore beneficiation device and promote the cascade utilization of the slag. Encourage the existing large-scale pyrometallurgical mines and non-ferrous metal by-product sulfur sands to increase their ore processing capacity, encourage small-scale pyrite ore joint construction to select mines, and form the use of pyrite for cascades; High-grade pyrite enters the furnace, increasing the amount of iron resources recovered.
The fourth measure is to reduce sulfur dioxide emissions from the tail gas of the acid plant. Increase research investment in vanadium sulphate catalysts, resolve technical difficulties in the manufacture of domestically produced catalysts, and accelerate the development of high-quality domestically produced catalysts.
The fifth measure is to actively search for sulfur resources and encourage various sulfur recovery. Encourage crude oil refining, natural gas purification, chemical fertilizer, chemical industry, coking desulfurization, etc. to increase sulfur recovery rate; increase domestic pyrometallurgy exploration efforts, increase domestic pyrite resources; recover sulfur resources in high-sulfur coals; and improve sulfuric acid production technology from phosphogypsum , process, equipment, recovery of sulfur resources from phosphogypsum.
The sixth measure is the combination of production, education and research, and technological innovation. Continue to strengthen the combination of production, education and research, develop new technologies, new processes, new materials, and new equipment to improve the overall equipment level of the sulfuric acid industry.
The proposed industrial development proposals include: continue to adjust the structure of raw materials; do a good job of “three wastes†treatment, continue to develop circular economy; increase technological innovation and increase the competitiveness of enterprises; encourage large-scale smelting enterprises to join with chemical fertilizers and chemical companies; Improve the industry access system and ensure the healthy development of the industry.
At the same time, in order to ensure the healthy and sustainable development of the sulphuric acid industry, the plan also proposes policy recommendations that the state should give subsidies for carbon dioxide from waste heat recovery and emission reduction of sulphuric acid; it is recommended to implement preferential policies for the on-grid power generation of sulphuric acid waste heat and for self-use. Excess electricity storage, or equivalent purchase; recommended imports of sulfur and domestic sulfur in the same tax treatment, VAT is immediately refunded 50%; proposed to increase access barriers in the scale of the device, environmental protection, energy consumption, device emissions indicators Those enterprises that fail to meet the requirements of the national standards and whose production wastewater does not reach “zero emissions†and whose energy consumption targets do not meet the standard requirements must exit the market within three years.
welding table, d28 welding table, casting welding table, steel welding table
Jiangsu Hoston Machine Tools Co., Ltd. , https://www.hosdunmachinetools.com