Full analysis on the development environment and c

2022-08-04
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Full analysis of the development environment and current situation of denitration in the glass industry

with the frequent occurrence of haze weather, the atmospheric environmental protection pressure is increasing. As one of the industries with high pollution and high energy consumption, glass has always been the target industry of tightening environmental protection policies. Polaris energy conservation and environmental protection launched a series of reports on "denitration analysis of the glass industry", including an overview of glass denitration, analysis of the denitration development environment of the glass industry, analysis of the denitration status of the glass industry, denitration market prospects of the glass industry, introduction to key enterprises, denitration investment and risk analysis of the glass industry, etc

1 overview of denitration in glass industry

1. 1 Characteristics of glass smoke

at present, domestic glass production lines mainly use petroleum coke, heavy oil, natural gas, producer gas, etc. as fuels. According to the production scale and the fuel used, the smoke exhaust temperature of flat glass production lines is mostly 400 ~ 500 ℃, and that of daily glass production lines is mostly 320 ~ 400 ℃. The main pollutants in the flue gas are SO2, NOx and dust, and some heavy metals are contained. SO2 is the main pollutant, and the emission concentration is 300 ~ 3000mg/m3; Compared with pulverized coal, the glass furnace dust has small particle size, strong adhesion and emission concentration less than 800mg/m3; The NOx concentration is high. Generally speaking, the nitrogen oxide concentration of glass furnace should be more than 2000 mg/m3; The furnace changes fire dynamically. The glass furnace changes fire every 15 to 20 minutes. During the process of changing fire, SO2, NOx and dust concentrations will change dramatically

1。 2 denitration methods in the glass industry

glass kilns have the characteristics of high furnace temperature (1500 ℃), small amount of flue gas but strong fluctuation, high NOx content, and common addition of waste heat boilers to reduce the exhaust temperature of flue gas (150 ℃). The current denitration methods mainly include low nitrogen combustion, SNCR, SCR and ozone oxidation denitration technologies

due to the particularity of glass furnace structure, it is difficult to carry out low nitrogen technology transformation, and it is difficult to independently meet the NOx emission standard at the current level

sncr denitration technology reacts in the high temperature range of 900 ~ 1100 ℃. Due to the influence of flue gas temperature, residence time, flue gas flow field and other conditions in the furnace, the reducing agent will have a certain impact on the glass additives and the quality of the produced glass, which is difficult to apply

scr uses liquid ammonia, urea and ammonia water as reductant under certain temperature and catalyst to selectively react with nitrogen oxides in flue gas and generate non-toxic and pollution-free nitrogen and water. SCR catalyst can be divided into high-temperature denitration catalyst (300 ~ 400 ℃) and low-temperature denitration catalyst (120 ~ 300 ℃) according to its reaction temperature. High temperature SCR denitration process has been quite mature and has been applied in a large number of flat glass production lines. Low temperature SCR denitration process is not yet very mature. At present, it has been applied in more than a dozen daily glass production lines in Shandong

ozone oxidation denitration technology is to use ozone to oxidize the water-insoluble nitric oxide in flue gas to generate water-soluble nitrogen dioxide, which is then washed and absorbed by alkali solution to achieve the purpose of denitration. Due to the high investment and operation cost of this process, and the difficult treatment of by-products, its application in glass kilns is limited

2 analysis of denitration development environment in glass industry

2. 1 policy environment

in order to strictly control the discharge of nitrogen oxides and other pollutants, the state has promulgated the corresponding environmental protection law of the people's Republic of China (implemented on January 1, 2015), the law of the people's Republic of China on the prevention and control of air pollution (the second revision on August 29, 2015), the action plan for the prevention and control of air pollution (GF [2013] No. 37) Laws, regulations and policies such as the action plan for clean and efficient utilization of coal in the industrial sector

on February 2, 2015, the Ministry of industry and information technology and the Ministry of Finance jointly issued the action plan for clean and efficient utilization of coal in industrial fields (hereinafter referred to as the action plan), aiming at reducing coal consumption and pollutant emission, and focusing on the use of coal in four industrial fields, including glass, industrial furnaces, coal chemical industry and industrial boilers, to comprehensively improve the clean and efficient utilization level of regional coal, and strive to achieve coal control and reduction, Prevent and control atmospheric environmental pollution. The plan clearly stipulates that "by 2017, we will save more than 80million tons of coal, reduce 500000 tons of soot, 600000 tons of sulfur dioxide and 400000 tons of nitrogen oxides, and promote the improvement of regional environmental quality. By 2020, we will strive to save more than 160 million tons of coal, and reduce 1million tons of soot, 1.2 million tons of sulfur dioxide and 800000 tons of nitrogen oxides."

Article 41 of the newly revised law of the people's Republic of China on the prevention and control of air pollution (the second revision on August 29, 2015) points out that "enterprises of iron and steel, building materials, non-ferrous metals, petroleum, chemical industry and other enterprises that discharge dust, sulfide and nitrogen oxides in the production process shall adopt cleaner production processes, build supporting dust removal, desulfurization, denitration and other devices, or take other measures to control the emission of air pollutants such as technological transformation" 。

the glass industry is generally divided into flat glass industry and daily-use glass industry. The Ministry of environmental protection and the General Administration of quality supervision, inspection and Quarantine jointly issued the emission standard of air pollutants for flat glass industry (GB) and the emission standard of pollutants for daily-use glass industry (second exposure draft). The emission of air pollutants by glass industry enterprises is strictly in accordance with this standard

both the newly-built flat glass enterprises and the existing flat glass enterprises should achieve the NOx emission standard of 700 mg/m3 on October 1, 2011 and January 1, 2014 respectively, as shown in Table 1; New daily glass enterprises and existing daily glass enterprises should achieve the standard of nitrogen oxide emission of 1000 mg/m3 on july1,2016 and january1,2018 respectively, as shown in Table 2:

with the increasing increase of environmental protection regulations, some provinces began to layout in advance. Shandong issued the emission standard of air pollutants for building materials industry in Shandong Province in May, 2013. From January 1, 2015, the existing enterprises and new enterprises will not be forced around the implants, and the wood plastic technology and process in Europe, America, Japan and other countries have further broken through and improved the emission standards of nitrogen oxides up to 700 mg/m3 and 500 mg/m3

2。 2 industry background

in the first half of 2015, under the circumstances of the declining investment value of real estate, the insufficient contribution of the automotive industry to the increment of glass demand, and the limited increment of flat glass export, flat glass was affected by the aggravation of the imbalance between market supply and demand. According to the data released by the National Bureau of statistics, the loss of flat glass enterprises above designated size is 34. 5%, loss of loss making enterprises 17. RMB 800million, a year-on-year increase of 31. 6%。 The polarization of flat glass enterprises is further aggravated under the situation that the losses of enterprises are expanding. Most enterprises are struggling near the profit and loss point. It can be seen that the market of flat glass industry is not optimistic, and the process of elimination and reshuffle of the industry has begun to accelerate

according to the data released by the National Bureau of statistics, the owner's business income of daily glass manufacturing in 2014 was 1660. 9.1 billion yuan, a cumulative year-on-year increase of 9. 74%; Now let's study the total tax amount 164. RMB 3.9 billion, with a cumulative year-on-year increase of 6. 55%, including 104 realized profits. RMB 1.6 billion, with a cumulative year-on-year increase of 4. 76%; Profit margin of main business income 6. 27%, a decrease of 0 over the previous year. 37 percentage points. In 2014, the operation trend of the daily glass industry was "one up and one down", that is, the output growth increased, the profit growth and the profit margin of main business income decreased, but the overall operation trend was still in the positive growth range. Although the development of the industry has encountered some difficulties and battles, the trend of continued improvement has not fundamentally changed

at present, the change of traditional market demand and the pressure of environmental protection are the two prominent problems faced by the current glass industry. In the first half of this year, the situation of both flat glass and daily-use glass industry was more severe than that of last year, and the development of the industry was facing a bottleneck. Especially on the issue of environmental protection, in the face of increasingly stringent environmental protection policies, how the glass industry can survive and develop has become a serious problem that every glass enterprise needs to face

3 analysis of denitration status in glass industry

3. 1 status quo of denitration industry construction in the glass industry

the emission standard of air pollutants for flat glass (GB) was published and implemented on October 1, 2010. However, as of 2013, 9% of enterprises in the national glass industry had not implemented this standard at the beginning of 2014. In 2014, with the promotion of Shahe municipal government of Hebei Province, breakthrough progress was made in the implementation of this standard

Shahe City is known as "China's glass city", accounting for nearly 20% of the national flat glass production capacity. In 2014, Shahe municipal government responded to the national environmental protection policy, blowing up an "environmental storm" in the glass industry: within one year, all enterprises in Shahe City launched denitration, desulfurization and dust removal equipment, which is a major event in the industry. However, the progress of flue gas treatment in the glass industry in China is still slow. By the end of 2014, if more than 7000 small glass kilns for daily use were added, more than 90% of glass enterprises had not conducted flue gas treatment in line with national standards

up to now, there are several companies with engineering achievements in flat glass flue gas denitration, including Jiangsu Kehang Environmental Protection Technology Co., Ltd., Hunan Lunan desulfurization and Denitration Technology Co., Ltd., Beijing Jiyuan purple Energy Technology Co., Ltd., Shandong Tiancan Environmental Protection Technology Co., Ltd., Guangxi boschke Environmental Protection Technology Co., Ltd

there are several companies with engineering achievements in domestic glass flue gas denitration, including Beijing Fangxin Lihua Technology Co., Ltd., Shanghai Hanyu environmental protection materials Co., Ltd., and China Energy Guoxin (Beijing) Technology Development Co., Ltd

3。 2 Analysis on denitration technology and its development in glass industry

3. 2。 1 common denitration technologies in the glass industry

at present, denitration processes with application performance in the glass industry can be selected from low-temperature SCR and high-temperature SCR. The advantages and disadvantages of the two technologies are shown in Table 3 below:

3. 2。 2 composition of denitration technology in the glass industry

up to now, the high-temperature SCR denitration process has been quite mature and has been applied in a large number of flat glass production lines. Low temperature SCR denitration process is not yet very mature. At present, it has been applied in more than a dozen daily glass production lines in Shandong

3。 2。 3 Analysis on the development trend of denitration technology in the glass industry

in terms of flue gas denitration of flat glass, the high-temperature SCR denitration process is now relatively mature and reliable in glass kilns, and others have not been able to operate stably for a long time. In addition, with the vigorous promotion of a number of industry giants such as Jiangsu Kehang Environmental Protection Technology Co., Ltd., Hunan Lunan desulfurization and Denitration Technology Co., Ltd. and Beijing Jiyuan Zineng Energy Technology Co., Ltd, It is difficult to compete with other technologies, which will be the mainstream treatment method for flat glass in the future

low temperature SCR technology is the main technology adopted for flue gas denitration treatment in the daily glass industry. Low temperature catalysts such as Beijing Fangxin Lihua Technology Co., Ltd., Shanghai Hanyu environmental protection materials Co., Ltd. and China Energy Guoxin (Beijing) Technology Development Co., Ltd. have been widely used, and have been recognized by some large enterprises such as Shandong Pharmaceutical glass, Shandong Huapeng, Shandong beihui, Taishan Shengliyuan, etc. With the continuous progress of low-temperature catalyst technology, there is a large space for cost reduction in the future, and the economy appears. It will have a broader application prospect in the future

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