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Offer project design, technology transfer and support services related to ionic membrane caustic soda, polyvinyl chloride, polypropylene, specialty resins (paste resins, chlorine vinegar, chlorpromazine and other multi-copolymer resins), hydrogen peroxide, styrene-butadiene rubber, chloroacetic acid, TCCA, organic silicon, polysilicon, Acetic acid and other inorganic chemicals, organic chemicals, synthetic materials and other petrochemical projects.

Able to design cyclone drying, revolving-stream drying, boiling beds, spray drying and other drying equipment projects of various capabilities, and provide the key equipment, of which the revolving-stream drying technology won the second prize of the National Science and Technology Invention Award.

Able to provide engineering design and services related to DCS, ESD, SIS and other automation and control technologies used in chemical production plants, of which the computer optimized control technology won the Golden Bull Science and Technology Progress Award of Jiangsu Province .

Having rich design experience and practical experience in ionic membrane caustic soda, and having designed multiple process units for Asahi Kasei, chlorine projects in Japan and China, and China North Chemical Machinery.

Absorbing, digesting and innovating advanced production technologies from Goodrich, Chisso, EVC and other foreign companies, able to provide enclosed PVC automated production technology and engineering design in various polymerizers including 30m3, 45m3, 70m3, 110m3 and so on. The chlor-alkali projects we have designed have advanced technologies, zero emissions, complete recycling of waste heat and exhaust, as well as energy-saving, water-saving, environmental protection and safety performance.

Technical team

The predecessor of Duble engineering team - the Research Institute of Xuzhou Northern Chlor-alkali Co., Ltd. had been engaged in the design of chemical projects since the 1990s. They have designed over 30 sets of chlor-alkali plants, and more than 100 chemical combination production devices, enjoying a high reputation in the chlor-alkali chemical industry in the country. There are a total of more than 120 team members, including technology, equipment, electrical apparatus and fire-fighting and utility engineers and project construction managers, having applied for a total of 19 patents, all of which have been authorized;

Resource conditions

The affiliated engineering company has the Class B qualifications for chemical engineering, petroleum and chemical product storage, Class B qualifications for designing construction projects, consulting qualification for chemical, construction, ecological construction and environmental protection projects, Class A1 (pressure vessel), Class A2 pressure vessels and GC1, 2, 3 pressure pipeline design qualifications. It is able to undertake technical development, design, consulting, construction, technical services, project management and general contracting for chemical, petrochemical and pharmaceutical projects, environmental protection and energy saving projects, distillation separation engineering, network communications engineering, instrument and meter engineering, and constructional engineering.

We have mature technology packages and experience of project design in terms of downstream products of high purity chloroacetic acid, sodium dichloroisocyanurate, TCCA, sodium bleaching powder, phosphorus trichloride, chloromethyl ether, epichlorohydrin, trichloroacetyl chloride and other projects.

The company has pressure vessel equipment manufacturing base with a history of more than a decade. The strong technical team and technology accumulation provide an effective support for the proprietary technology and core equipment supporting the chemical projects.


Relevant Case:


Sinopec Luoyang Branch -8 million t/y crude oil distillation plant Luoyang Yuhe Chemical Co., Ltd. -50,000 t/y petroleum ether project Liaoning Tongda Chemical Corporation -120,000 t/y butadiene reconstruction project