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The environmental protection requirements of the calcium carbide industry are increasing, and calcium carbide preheating furnace technology may become an important magic weapon to alleviate the predicament of the calcium carbide industry

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In the next few years, the state will gradually impose a carbon dioxide emission tax (carbon tax) on industrial enterprises. Calcium carbide, as a high energy consumption and high pollution industry, will be severely affected by carbon taxes. According to calculations calculated by the Technology Department of the Calcium Carbide Industry Association, the current average carbon dioxide emissions per ton of calcium carbide produced in the calcium carbide industry is about 3.7 tons. In 2014, the 26 million tons of calcium carbide produced 96.2 million tons of carbon dioxide. The carbon tax standard will be gradually increased from 10 yuan/ton to 100 yuan/ton, and the future carbon tax alone will be as high as 9.6 billion yuan, which will swallow all the profits of the calcium carbide industry.

   In 2014, in order to promote the upgrading of the calcium carbide industry, reduce energy consumption and reduce air pollution, the Ministry of Industry and Information Technology issued the "Access Conditions for Calcium Carbide Industry (2014 Revised Edition)". The main contents are as follows:

Newly built or expanded calcium carbide production equipment must enter the industrial park and have corresponding downstream industries to support it; existing calcium carbide production enterprises must enter the industrial park by the end of 2020, and form a close relationship with the nearby downstream industries to enable calcium carbide production The generated pollutants, by-products, residues, etc. can be comprehensively treated and utilized.

  Implement total control of calcium carbide production capacity. In principle, it is forbidden to build new calcium carbide projects. New calcium carbide production capacity must be replaced by equal or reduced quantities, and the replaced capacity must be dismantled before the new capacity is built. Strengthen technological progress and accelerate the elimination of backward production capacity.

   Newly built or rebuilt or expanded calcium carbide production equipment must use advanced closed calcium carbide furnaces, the capacity of a single furnace is not less than 40,000 kVA, and the total construction capacity (built at one time) must be greater than 150,000 kVA.

  To build or renovate and expand the calcium carbide production equipment per ton of calcium carbide (300 liters/kg equivalent) electric furnace power consumption ≤ 3200 kWh, comprehensive energy consumption ≤ 1.0 ton of standard coal. The existing calcium carbide production equipment must meet the above standards by the end of 2015. After the implementation of the new national standard "Energy Consumption Quota per Product of Calcium Carbide", it shall be implemented in accordance with the new national standard.

   Calcium carbide furnace gas must be 100% recycled and comprehensively utilized to encourage use in the production of high value-added chemical products. From the above conditions, we can see the country's determination to control the overcapacity of calcium carbide, save energy consumption of calcium carbide, and reduce air pollution. New energy consumption standards and regulations such as 100% recycling of calcium carbide furnace gas have raised the entry barrier for new furnaces, and will eliminate a batch of technologically backward calcium carbide furnaces. In the future, new technologies such as closed calcium carbide furnaces and tail gas recovery technologies will become The rigid requirements of the new furnace project.

  The calcium carbide preheating furnace technology can effectively alleviate the predicament of the calcium carbide industry

The new calcium carbide preheating furnace technology is a supporting technology for calcium carbide production independently developed by Shenwu Industrial Furnace. This technology integrates regenerative radiant tube heating technology and annular preheating furnace device. It is based on the "new calcium carbide preheating" developed by Shenwu Industrial Furnace. Furnace system" forms a new process for calcium carbide production.

   Shenwu calcium carbide preheating furnace technology advantages

Compared with the traditional coal chemical process, low-cost acetylene, synthesis gas, natural gas, artificial petroleum, etc. produced by the Shenwu new calcium carbide acetylene process are used as raw materials to synthesize methanol, gasoline and diesel, olefins, aromatics, and For important energy chemical products such as natural gas and ethylene glycol, the investment per unit product can be reduced by more than 70%, energy conversion efficiency can be increased by more than 20% to 30%, carbon dioxide emissions can be reduced by more than 20%, and water consumption by more than 50%. The overall production cost of the company can be reduced by about 30%.

   At present, the average price of calcium carbide in the country is about 2,460 yuan/ton, while the production cost of calcium carbide under the traditional calcium carbide process is about 2,500 yuan/ton. Most calcium carbide enterprises are in a state of meager profit or even loss. Shenwu calcium carbide preheating furnace technology can reduce the cost of calcium carbide by 500 to 800 yuan per ton by reducing raw material costs, reducing electricity consumption, and generating high value-added oil and gas products, and significantly increase the overall profit of calcium carbide enterprises. Even if crude oil prices are hovering at low levels in the future, calcium carbide preheating furnace technology will still have cost advantages over ethylene PVC, and it will meet national standards in terms of energy saving, emission reduction and reuse. The promotion of this technology can effectively alleviate the current difficulties faced by my country's calcium carbide enterprises.