China Coatings Network
News: At present, the Ministry of Environmental Protection is formulating
industrial pollutant prevention and control technology policy, the National Development and Reform Commission is developing titanium dioxide industry energy consumption standards, is discussing and formulating the "titanium dioxide industry standards" is also expected to be introduced this year. These new industry regulations will accelerate the integration of the titanium dioxide industry. At the same time, large enterprises in the industry have started ahead of time to strengthen clean production and pollution prevention and control, and achieved outstanding results.
Bi Sheng, director of the Titanium White Branch Center of the National Chemical Productivity Promotion Center, told the China Chemical News: "With the rapid changes in the market, coupled with severe environmental pressure, in the past year or two, the industry has more than 10 small titanium white enterprises with no long-term development power closed, dismantled, or in a basic or semi-discontinued state." This somewhat alters the disorderly image of previous doping. It is expected that in the next 1 to 2 years, there will be some small and medium-sized titanium dioxide enterprises gradually fade out.
He believes that after the introduction of the two major policies of "Titanium Dioxide Industry Standard Conditions" and "Technical Policy for the Prevention and Control of Pollution in Titanium Dioxide Industry", the entry threshold of titanium dioxide enterprises will be significantly raised, further catalytic the withdrawal of small production capacity, and promote industry integration and concentration.
the biggest disadvantage of titanium dioxide by sulfuric acid method is that the "three wastes" emissions are large, the treatment cost is high, enterprises regard this as a heavy "burden". "The passive into the initiative, the development of market-oriented industrial chain, titanium dioxide enterprises in the long-term healthy development of the fundamental." Bi Sheng said.
reporter learned that the current industry in the "three waste" treatment and comprehensive utilization has achieved many results, the emergence of a variety of co-production methods other than acid-titanium clean production mode, the healthy development of the industry has a positive significance. However, these joint production law industry chain has a strong enterprise or regional industrial characteristics, has strong limitations, it is difficult to popularize and popularize to the whole industry. In this regard, Bi Sheng gave the suggestion that enterprises should be in response to local conditions, for the enterprise and surrounding industries and markets, do a good job of waste comprehensive utilization, reduce production and operation costs, the establishment of enterprises and regions with characteristics of clean production and circular economy industry chain, and truly realize the clean and efficient use of resources.
It is learned that the upcoming new regulations of the industry will make clear requirements for the comprehensive utilization of resources, such as the requirements of the use of co-production method of sulfuric acid production process enterprises, to encourage the construction of waste sulphuric acid concentration reuse or integrated utilization devices, the production of co-production of ammonium sulfate and other products, and constantly reduce the amount of sulfuric acid emissions. At the time, many titanium dioxide enterprises are also relying on the characteristics of local related industries to change waste as raw materials, the circular economy sulfuric acid method as the scientific development of titanium dioxide enterprises "green password."
, a large amount of refining waste each year - liquid sulfur yellow, is now Ningbo Xinfu titanium dioxide enterprise sulfuric acid plant raw materials. Xinfu Chairman Lu Xiangfang told reporters: "With a unique circular economy process design, we settled in the park, the creation of Xinfu titanium industry, eating sulfuric acid production capacity for the manufacture of titanium dioxide, the production process produced by high temperature steam recovery as the necessary heat for the reaction process equipment, the whole process does not use 1 ton of fuel;" The resulting acid recovery is put back into reaction, and the waste iron sulfate is supplied in part to the park's public sewage treatment plant as water purification additives, and partly to a phosphate fertilizer plant in the park as raw materials. Finally neutral acidic wastewater after the lime powder has also become the production of cement on the good raw materials, forming a closed-circuit cycle, the annual output value of 1.5 billion yuan.
He Mingchuan, general manager of Guangdong Huiyun Titanium Co., Ltd., told reporters: "We will treat waste, waste as the goal of the circular economy, the use of local stone enterprises produced waste slag (material) to neutralise the treatment of the company's acidic wastewater production titanium gypsum, and then as a cement coagulant surrounding cement plants, to achieve waste for resource recycling." The by-product of titanium white production process is the production of iron sulfate and waste acid for the production of polymerized iron sulfate as a water purifier, as well as the production of iron sulphuric acid and titanium sulfate together, not only can recover sulfur resources, but also can improve the content of iron in slag, improve its utilization value. For the black mud produced by acid solution, our company recycles the available titanium, and then in the middle, dehydration, for cement plant for mixed materials. In view of the large amount of acid solution instantaneous emissions, difficult to deal with the situation, we introduce continuous acid solution technology, reduce the problem of instantaneous emissions, reduce the difficulty of processing, to achieve full compliance with the emission standards. The
reporter learned that the titanium dioxide industry pollution prevention and control technology policy is being formulated, proposed the use of a number of clean production technology to replace the traditional sulfuric acid production process. At present, many enterprises in the industry have begun to promote the application of new processes, new technologies.
Yin Hongzhong, general manager of Shandong Daon Titanium Co., Ltd., told reporters that there are two main raw materials for the production of titanium dioxide sulfate, one is titanium ore, the other is acid-soluble titanium slag, the latter's active ingredients are about 1.6 times the former, less waste emissions. In order to put energy conservation and emission reduction work into practice, The company adheres to the use of acid-soluble titanium slag-based titanium riches as raw materials to reduce the emissions of waste by-products. The use of acid-soluble titanium slag can shorten the production process, reduce the comprehensive energy consumption of titanium dioxide about 20%, energy saving benefits are obvious. As a result, Doane Titanium was listed as one of the demonstration projects of clean production and circular economy cultivated by the Strategic Alliance for Technological Innovation of the Titanium White Powder Industry, and became the energy efficiency leader of PetroChina (11.42, 0.08, 0.71%) (11.12, -0.06, -0.54%) and the Chemical Industry Federation in 2013.
according to He Mingchuan, Huiyun Titanium Company through the application of continuous acidification technology, so that the acid solution rate of more than 98%, titanium recovery rate increased by more than 1.7%, for an annual output of 50,000 tons of plant, can save 2040 tons of titanium ore, 3200 tons of sulfuric acid, standard coal 2400 tons, water resources of 800,000 cubic meters. At the same time, the company can reduce CO2 emissions by 183.6 million tons per year, 716 tons of soot, 220,000 tons of gypsum slag and 2 million tons of wastewater per year.
new technical policy on pollution prevention and control of titanium dioxide industry will make clear requirements for the prevention and control of air pollution, water pollution, solid waste disposal and comprehensive utilization of the industry. In this regard, titanium dioxide enterprises have also been deployed accordingly.
" at present, the company has been acid solution, calcination exhaust gas has carried out technical upgrades. In the face of the upcoming new policy provisions, in 2015, we plan to invest an further 1.2 million yuan for the technical transformation and upgrading of exhaust gas treatment facilities and in accordance with cleaner production standards to improve some environmental protection facilities, improve the company's on-site environment. He Wenlong, chairman of Shanghai Yibo Titanium White Powder Co., Ltd., said in an interview with reporters.
He Wenlong also told reporters: "Titanium dioxide production raw materials and products are powdered substances, intermediate products are liquid form." For dust treatment, we use high-efficiency dust removers, the procurement of low dust titanium iron ore, closed transport of materials, from the source to reduce dust. In October 2014, we carried out a comprehensive upgrade of the exhaust gas treatment facilities, and commissioned the District Environmental Protection Bureau monitoring station to test the company's exhaust emissions equipment, the test results meet the current environmental requirements. Huang Baofeng, deputy general manager of Shandong Dongjia Group,
said: "We have invested in the construction of water reuse projects, so that the reuse rate of wastewater reached 60%, greatly reducing the consumption of water, after treatment of water quality to achieve titanium production process and boiler water needs, to achieve the goal of resource conservation and emission reduction." We also produce industrial water purifiers for wastewater treatment by using iron sulfate, a by-product produced during the production of partial waste acid and titanium white; In addition, the use of rare metal extraction in waste sulfuric acid enrichment to obtain oxidation , 20% of waste sulfuric acid using waste acid and ammonia water and, after compression, purification, concentration, separation, drying to produce high-quality ammonium sulfate, further reduce costs and reduce pollutant emissions. Dongjia Group has also introduced continuous acidification technology, effectively solve the serious problem of air pollution in the process of acid solution, ensure that exhaust gas treatment meets the standard emissions, reduce environmental pressure, and achieve good social benefits and development opportunities. ”