Our High Temperature Bellow Expansion Joints are necessary components for Coke Dry Quenching, a clean solution system being installed in the coking and steel industry across China. We are the first domestic company in China to manufacturer joints equal quality to Nippon Steel (previously dominated the China market). CDQ expansion joints are able to withstand temperatures exceeding 2100℉ ahrenheit and resist the corrosive effect of the toxic gas byproducts.
The primary market for our CDQ Expansion Joints are iron and steel mills in China looking to improve efficiency, reduce emissions, and conserve energy. We have no strong domestic competitors in this product line domestically. |
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Coke Dry Quench System is more economical than the Coke Wet Quench system
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The Coke Dry Quenching System Reuses Waste Heat, Saves Water and Reduce Pollution
The coking process is an integral part of steel production. Coking involves baking coal at high temperature of over 2,000 ℉. Traditionally water is used to cool the hot coke which not only wastes water and heat but also releases harmful pollutants.
The revolutionary Coke Dry Quench system is a clean technology that uses gas in an enclosed system to cool the hot coke. The hot gas is then recycled to create electricity. As a result, money is saved from conserving electricity and water and pollution is reduced from lower emission of CO2 and other pollutants.
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Demand Drivers in China
China is currently the world's largest producer of steel and coal chemicals. The largest single environmental issue with steel production is the carburizing of coal into coke for use in the iron-making process.
The implementation of the Coke Dry Quenching system allows China's iron and steel manufacturers to improve efficiency, reduce emissions, and conserve energy.
As part of the 11th Five Year Plan, China mandates the use of CDQs and the utilization of exhaust heat in broader scope for the largest steel companies.
As consolidation of China's steel industry takes place, the larger and better capitalized plants are more conscious about energy conservation and environmental impacts.
As the implementation of CDQ system pays back for itself in a few years, there are great economic incentives for steel mills to install CDQs outside of government policies.
| Cost Benefits of Installing Two CDQ Systems |
By installing 2 CDQ systems, a steel mill can save over $9 million in electricity, almost 4 million tons of water and prevent emission of over 100,000 mt CO2 annually.
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Coke Dry Quenching |
Coke Wet Quenching |
Electricity from Waste Heat |
167 GwH/Yr(1) |
0 GwH/Yr |
Electricity Savings |
$9,260,630(2) |
0 |
Water Used |
0 |
3,723,000 tons(3) |
Cost of Water |
0 |
($1,092,826)(4) |
Total Benefit/(Costs): |
$9,260,630 |
($1,092,826) |
C02 Emitted |
4,328 metric tonnes(1) |
134,646 metric tonnes(1) |
Toxic Particles Released(1) |
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Hydroxybenzene |
None |
33 mg/m3 |
Cyanide |
None |
4 mg/m3 |
Sulfide |
None |
7 mg/m3 |
Ammonia |
None |
14 mg/m3 |
Coke Dust |
5 mg/m3 |
13 mg/m3 |
(1). UNFCCC: Baotou Iron & Steel CDQ and Waste Heat Utilization, 03/08/2007. Assumption: Using two CDQ systems: each with 25t/hr of coal capacity and 15 MW electricity generating capacity
(2). Huaneng 2009 average sale ($0.055 /KwH )
(3). "CDQ-Modern coking technology" by Anhui Vocational College of Metallurgy and Technology
(4). http://price.h2o-china.com/ |
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