On October 8, 2022, the "General Contracting Project for SCR Denitration Project of 4000t/d New Dry Process Cement Clinker Production Line of Anhui Pearl Cement Group Co., Ltd.", which was contracted by Central Asia Environmental Protection Technology Co., Ltd., officially started. Under the overall command of the company's leaders, all departments closely contacted and worked together to actively and orderly promote the preliminary preparation work. The operation department took the lead in the field work, and the technical department, the quality, safety and environment department and other professional personnel cooperated to establish the denitration project department, conducted safety education and technical disclosure for all personnel entering the site, and formulated a sound construction scheme and schedule, In the early stage of the project, the material preparation and processing operations shall be comprehensively controlled and accurately managed.
After more than a month of joint efforts, the on-site construction team, under the scientific management of the environmental protection company, the strict supervision of the Denitration Project Department and the careful guidance of professional technicians, overcame the adverse factors such as the space shortage of the new production line site, the difficulty in personnel deployment during the epidemic situation, and completed the processing, prefabrication, rust removal and anti-corrosion of the reactor air inlet section, middle straight section, bottom frame, reducer section, air outlet section, and cone bucket section, As well as the preparation of some external frames, the hoisting of reactor bottom shell was successfully started in late November.
At the same time, in order to ensure safe production, civilized construction and project quality progress, the environmental protection company has repeatedly organized relevant departments to carry out comprehensive production inspections on the construction site, timely find and eliminate potential safety hazards, and on the premise of strictly complying with the contract drawings and process specifications and ensuring the safety of personnel and equipment, try to advance the project progress as far as possible to reduce the impact of winter weather on the construction period and quality, Allow sufficient time for subsequent assembly.
The flue gas SCR denitration project of Anhui Pearl Cement is based on the requirements of Emission Standard of Air Pollutants for Cement Industry (GB4915-2013) and Anhui Provincial landmark DB34/3576-2020. About 20% ammonia is used as the reducing agent. The denitration device is arranged in the flue behind the waste heat boiler at the kiln end and in front of the high-temperature fan. The denitration reactor system is provided with a separate bypass system. During the low temperature period of starting and stopping the kiln or under special working conditions, It will not affect the normal production of the kiln system. The whole set of SCR denitration device consists of ammonia water receiving and storage system, ammonia water supply and transportation, metering and distribution system, ammonia water injection system, flue, SCR reactor system, ash removal system and auxiliary systems. It is the second new medium temperature and medium dust SCR denitration project of Central Asia Environmental Protection Company in the province after South Hefei. The design process of the project fully considers the actual use effect of the cement SCR device in South Hefei, The structural dimensions of each part of the system and the type selection of catalyst have been improved and optimized, so that the removal efficiency of nitrogen oxides and ash removal efficiency will be significantly improved, and ammonia consumption will be reduced at the same time, giving better consideration to the economy and practicality while meeting the environmental discharge standards. After completion, the project will play an exemplary role in the construction of environmental protection projects in Pearl Cement Group and even in the province!