Cement Industry Speeds up Ultra-low Emission, a Feast
for Equipment Enterprises--How Much Does the Cement Industry Invest in Ultra-low Emission? Ccement. Com/Price _ list -1-s0-e0-p0-c0-k100059-b0. . On July 3,
2018, the "Three-year Action Plan for Winning the Blue Sky Defense War" issued by the State Council mentioned promoting the implementation of ultra-low emission transformation in steel and other industries; In June 2020, on the issue of "Technical Guidelines for the Formulation of Emergency Emission Reduction Measures for Key Industries in Heavily Polluted Weather (Revised Edition 2020)", the letter No.340 of the Environmental Protection Office formally put forward the performance classification of cement industry, which was limited to key areas of environmental protection at that time, and the A-level requirements were equivalent to ultra-low emission requirements, particulate matter, sulfur dioxide and nitrogen oxides. The requirements are 10 mg, 35 mg and 50 mg respectively, which are basically consistent with the current ultra-low emission requirements. But at that time, the policy was to encourage people to declare A-level enterprises, not mandatory requirements. A-level enterprises enjoyed certain preferential policies for environmental protection to make up for environmental protection investment. At that time, it was estimated that the industry would reach about 10% of A-level enterprises in the short term. For example, in October 2020, the Department of Ecology and Environment of Henan Province identified that there were only four cement enterprises in the province. The main reason is that if the production line with a daily output of 5000 tons built 15 years ago has not been transformed, it will cost at least 50 million yuan to complete the ultra-low emission investment, and some production lines will cost hundreds of millions of yuan, which is a huge investment for cement enterprises.
At present, Henan, Shandong, Zhejiang, Ningxia, Shanxi and other places have issued local ultra-low emission standards. With the progress of technology and the high profits of the cement industry in the past few years, about 200-300 cement production lines in China have completed ultra-low emission transformation, mainly concentrated in Beijing, Tianjin, Hebei and surrounding areas. For example, the cement industry in Henan Province estimates that more than 60% of the cement kiln lines have completed ultra-low emission transformation. According to the requirements of the document, "By the end of 2025, 50% of the cement clinker production capacity in key areas will be transformed." By the end of 2025, there will be about 200-300 clinker production lines in the country to complete the transformation ; "By the end of 2028, cement clinker production enterprises in key regions will have basically completed the transformation, and the whole country will strive to complete the transformation of 80% of cement clinker production capacity. " It is expected that by the end of 2028, about 500 clinker production lines will have completed the transformation of ultra-low emissions, and most of the remaining clinker production lines will be backward and eliminated. With the decrease of cement demand year by year, it will be gradually eliminated and shut down. According to the average investment of 50 million yuan per clinker production line, the cement industry still needs to invest about 4 billion yuan. On the one hand,
the state requires the cement industry to carry out compulsory ultra-low emission transformation, on the other hand, it also gives real gold and silver subsidies and preferential tax policies, through the central air pollution prevention and control special funds, provincia l environmental protection transformation funds and other policies, according to the amount of the project to give 20% -50% subsidies, there are many reports in the news at present. It is hoped that cement enterprises can seize the policy opportunity and apply for government subsidy funds. Taking into account the subsidy funds in previous years, the total subsidy for environmental protection transformation received by the cement industry is more than 1.5 billion yuan.
The following is a detailed description of equipment investment for the specific requirements of ultra-low emission in the cement industry:
I. Organized emission control
1.
This article has the largest investment and uses low nitrogen burners. Low nitrogen combustion technology and SNCR technology, such as graded combustion and fine control of oxygen content in other decomposition furnaces, can no longer meet the requirements of the indicators. In the past two years, there were 89 technical routes. At present, the mainstream of the industry is composite denitrification technology, which uses low nitrogen burners, graded combustion technology, SNCR and SCR technology (subdivided into high temperature and high dust). High temperature, low dust, medium temperature, medium dust and other different technical routes, as well as pipeline (process) denitrification, thermal carbon reduction denitrification, LCR denitrification and other technical routes, especially pointed out that this regulation stipulates that "the hourly average value of emission concentration of cement enterprises with ultra-low emissions meets the above requirements at least 95% of the monthly production time". Taking into account some special circumstances of the production line, this also brings benefits to the precise denitrification technology with lower investment. On the whole, the total investment of the mainstream denitrification technology of a 5000-ton clinker line is about 25-30 million yuan, which is good for professional environmental protection denitrification equipment enterprises.
1.
Because the cement raw material contains a large amount of alkaline calcium oxide, etc., it has the property of self-desulfurization, the sulfur emission in most areas does not exceed the standard, it will exceed the standard only during the shutdown period of the vertical mill, most areas can use the dry or composite desulfurization technology, and the liquid or solid desulfurizer can be sprayed into the appropriate position to meet the requirements. Hardware investment ranges from hundreds of thousands to one or two million yuan. In South China and other areas where the sulfur content in limestone exceeds the standard, it is necessary to build wet desulfurization projects with an investment of one or two million yuan to benefit professional environmental protection desulfurization enterprises.
1.
The most expensive part of this article is the transformation of dust collectors at kiln head, kiln tail and cement mill. The air volume of this part of dust collection is relatively large. Some dust collectors can not meet the emission requirements only by replacing the dust collection bags. The dust collection bags must be heightened or the number of filter bags must be increased. The purpose is to increase the total filtration area and reduce the filtration wind speed to meet the ultra-low emission requirements (some areas still use electrostatic precipitators, which must be transformed into electric bags or electric bags), and some enterprises even require the transformation to meet the most advanced emission standard of 5 mg; Other small-scale dust collectors can meet the requirements by replacing ultra-low emission filter bags. The total investment of a 5000-ton clinker cement enterprise is about 120 million yuan, which is good for environmental protection dust collection host enterprises and dust collection bag manufacturing enterprises.
2. Unorganized emission control
2. Each plant invests differently according to the actual situation, focusing on the investment of the shed, which covers an area of millions of yuan; In addition, the bagged and bulk loading lanes shall be closed, the front and rear entrances and exits shall be equipped with fast closed doors, and the factory buildings and other holes shall be equipped with windows for closure. Dry fog dust suppression and fast doors are new requirements in the past two years, and the renovation cost is about 23 million, which is good for steel structure construction enterprises, dry fog dust suppression equipment enterprises, fast door production enterprises, etc.
2.
This requires that all belt corridors must be closed, and in some areas, even the structure of belt corridors with simple sealing covers does not meet the requirements, and the belt corridors must be fully sealed. There are many belt corridors in cement plants, and at least millions of yuan are spent on the sealing transformation of belt corridors in the whole plant, including the sealing of the transfer platform of belt corridors. The belt tensioning device is fully sealed, etc. At the same time, some feeding points and blanking points must also be sealed for dust collection, and dust collection covers must be installed. Some of them need to add or change large dust collectors, which require a large number of steel structure closures, which is good for steel structure construction enterprises and dust collector production enterprises. 2.2
.
III. Requirements for
clean transportation 3.
Enterprises in key regions where the proportion of clean transportation of raw materials and fuels is less than 80% will be replaced by new energy vehicles (by the end of 2025, the proportion of new energy vehicles will not be less than 60%), and all other raw materials and fuels will be replaced by new energy or vehicles with the Sixth National Emission Standard. Clean transportation is preferred for product transportation, and new energy or national six emission standard vehicles are used for all automobile transportation. Cement enterprises generally do not purchase vehicles by themselves, mostly using outsourcing transportation mode, although there is no increase in direct input, but the wool comes from the sheep, which will increase the production cost of enterprises, especially for the transportation of limestone in self-owned mines, generally requiring the use of belt or pipe belt conveyor transportation, although reducing the cost of transportation and operation, but the one-time investment is huge. The investment of 1km belt corridor is tens of millions of yuan.
3. Generally, a cement enterprise has at least one forklift, three forklifts, and one or two internal material transportation vehicles. If all the new energy vehicles are replaced, several million yuan will be needed. If outsourcing is carried out, although the fixed assets investment will not be increased, the production cost will be transferred and increased. This article is good for new energy forklift, forklift and transportation vehicle enterprises.
4. Strengthen the whole process of fine environmental management
4. Cement enterprises need to invest one or two million yuan in software and hardware, and also require third-party maintenance, enterprises spend tens of thousands of yuan annually on maintenance costs. Good for CEMS manufacturing enterprises and third-party maintenance enterprises, telecommunications and other digital companies.
4. The electronic account of basic information of transport vehicles shall be kept for no less than 5 years, the historical records of vehicles entering and leaving the factory shall be kept for no less than 24 months, and the video shall be kept for no less than 12 months. At the same time, information registration management shall be carried out for in-plant transport vehicles and off-road mobile machinery, and real-time updates and uploads shall be carried out. The local historical records shall be kept for no less than 5 years. This requirement requires enterprises to spend hundreds of thousands of yuan to buy professional software, which is good for professional software companies.
4. In some areas, air micro-stations, TSP and other facilities should be built and networked.
This enterprise should invest at least one million yuan to benefit professional software companies, automation companies, video surveillance manufacturers and other equipment enterprises.
With the continuous improvement of some environmental protection requirements in recent years, many enterprises have successively carried out technical transformation of some projects. The introduction of this document comprehensively summarizes the environmental protection requirements of previous years, and also gives a time buffer. Cement enterprises distribute the implementation of transformation according to their actual situation. Reduce the pressure of centralized payment of funds.
Summary: Cement enterprise ultra-low emission transformation, the current technology has been mature, as long as the enterprise is willing to spend money, can be done; National documents have been issued and specific time requirements have been given. It is expected that more stringent and detailed specific requirements (including environmental performance classification requirements and provincial cement industry local emission standards) will be issued at the provincial level. Cement enterprises can only carry out construction in batches according to the standard requirements and complete acceptance according to the time nodes;
In view of the serious situation of overcapacity and sharp decline in profits in the cement industry, and the fact that the demand for cement has been in the downward channel, the annual output of cement has been reduced by tens of millions of tons; For some production lines without mines, especially old production lines, high energy consumption, poor market conditions and high comprehensive manufacturing costs, not only environmental protection transformation, but also energy consumption and safety transformation should be carried out, the overall investment is relatively huge, and the document also has specific requirements for the implementation of the Guidance Catalogue for Industrial Structure Adjustment. Eliminate backward production capacity in accordance with the law and regulations through comprehensive means. Give full play to the role of standards such as energy consumption, environmental protection, quality, safety, material consumption and water consumption, guide the orderly withdrawal of inefficient production capacity with high energy consumption and emission intensity, and encourage key regions to formulate plans for the withdrawal of restricted production capacity. Enterprises or facilities listed in the phase-out plan no longer require the implementation of ultra-low emission transformation, which requires careful consideration by enterprises to make choices.
