The flue gas desulphurization (FGD) laboratory of GSTRI established in 1990 is a key laboratory entitled by former State Power Corporation. The laboratory has been equipped with desulfurization test devices for various processes and internationally advanced technical equipment. Now it has become the biggest professional desulphurization lab with fullest functions in China. There are several experts well-known at home and abroad, close technichal exchange with some domestic and foreign research institutes and updated flue gas desulfurization technology trends. This laboratory has completed several key research projects of national and ministry levels and provided technical support and guidance for desulfurization engineering construction of over 60 thermal power plants. Working of the lab has powerfully impelled progress of the desulphurization technology and localization proceedings of desulfurization equipment.
Service items
The FGD laboratory is equipped with desulfurization test devices of many kinds of crafts such as furnace calcium injection, rotating spray/flue injection, simplified wet method of water film precipitator, wet lime/limestone, enhanced wet limestone, seawater desulfurization and so on. Overall performance and equipment of the laboratory has reached international advanced level. The laboratory owns the largest cold-state test device of wet FGD and grout nozzle performance testing device in the world.
Wet desulphurization cold-state (structure optimization) test (demisting test bed)
The absorption tower on the test bed, 1.6 meters in diameter and 8 meters high, can simulate flue gas of 47000m3, which is the largest in the world. Air goes through the inlet duct (downward inclined 8, 10 and 12 degrees), enters the washing tower, runs up and through the air distribution board and goes into spray area. Water in the cycling tank is pumped into the sprinkler system trough an electromagnetic flowmeter by a centrifugal pump. The sprinkler system, composed of five layers of nozzles, sprays downward and the sprayed water contact counterflow air and then returns to the cycling tank. Air after spray area is got rid of water droplets by the demister and finally is emitted by an induced draft fan (ID fan).
This test bed is used to evaluate airflow and fluid flow distribution and pressure drop on each section of the absorption tower. We can do experiments for optimization of absorption towers¡¯ inlets and outlets and each part¡¯s structure of absorption towers¡¯ bodies, as well as performance tests for spraying systems and demisters.
•Dedusting-desulfurization integration test bed for venturi water film technology
The dedusting and desulfurization integration process of wet venturi water film technology utilizes existing water film precipitators, does some necessary retrofit and adds such facilities as a preparation system, a spray system and a circular oxidation system of desulfurization sorbents. This process can realize integration of dedusting and desulfurization in the same equipment system. It has such advantages as simple system, small land occupation and low investment cost. This process is especially applicable to old unit retrofit.
The test bed can treat flue gas of 1,800Nm3/h. It is composed of a sorbent slurry control system, a gas control device, a wet precipitator absorption tower (including nozzles and demisters) and a forced oxidization device etc.
The test bed has been used to complete the following experiments and study: flue gas purification and ash water pH treatment of Guiyang Power Plant, pilot test for simple desulfurization of the wet precipitator in Guiyang Power Plant, and experimental study of process parameter optimization and key equipment under the project "research on desulfurization technology of venturi water film precipitators ".
This process listed in Key Projects Program of the Ninth Five-year Plan of China, has been successfully applied in No.1 unit (125MW) of Guixi Power Plant in Jiangxi Province.
• wet lime-limestone desulfurization test bed
Wet limestone desulfurization is the most popular FGD process at home and abroad. This test bed was set up in order to digest and absorb foreign technology, solve problems appeared in industrial operation, and optimize structure design and process parameters of absorption towers. This test bed (cold and heat state compatibility design) can process flue gas of 10,000 Nm3 / h. Simulated flue gas goes into the ¦Ð typed absorption tower, flows down to the parallel flow absorption area first and then runs up into the counterflow absorption area. After going through the spray washing system, the flue gas enters two-stage demisters and then runs into the atmosphere through the ID fan. This test bed is operated in a flexible way. It can be used to undertake air distribution experiments for different type absorption towers and simulate actual conditions of power plants to do experiments in different conditions in order to find out suitable desulfurization process parameters.
The test bed offered technical service for desulphurization experiment study of high-calcium fly ash in Xiaolongtan Power Plant of Yunnan Province.
• Seawater desulfurization process
The seawater desulfurization process is to make use of characteristics of sea water and let the water contact flue gas so as to remove sulfur dioxide from flue gas. This technology has simple process flow and is applicable to FGD of coastal power plants. The seawater desulfurization test bed was established beside No.4 unit of Shenzhen Western Power Plant after bench-scale test in a laboratory. This test bed can deal with flue gas of 1,500 Nm3/h. Seawater comes from humidification water for dry ash removal of No.4 unit. Establishment of the test bed supplied basis to design review and construction of the built seawater desulfurization industrial device in Shenzhen Western Power Plant. It also can give scientific basis and technical service to nationalization design, equipment option and matching, and promotion and application of seawater desulphurization process.
•Enhanced wet limestone desulfurization test bed
The enhanced wet limestone FGD process achieves desulfurization by means of high velocity absorption tower structure and the absorbent limestone. There are empty towers of counterflow, spraying and vertical types on this test bed. It is used to study absorption tower structures for high speed flow (including atomizing nozzle, layers and height of the spray system, parallel flow/counterflow arrangement, air distribution, demister arrangement and washing nozzle structure etc.) so as to simplify structure of desulphurization absorption towers. The pilot test device has been built in Pucheng Power Plant of Shaanxi Province. We plan to establish a demonstration project on large units.
• Demister flush test bed
This test bed is mainly composed of a flush water pump, pipes, flowmeters, nozzles (there is a certain distance between the upper layer and the lower), a demister and a water distribution measurement device etc. It has main functions as follows: to do quantitative determination of single nozzle¡¯s flush water distribution and flush water superposition distribution of multiple nozzles set according to some space; to do qualitative determination of washing intensity for single nozzle and multiple nozzles. The measurement results are used to determine such important design parameters as arrangement of demister nozzles, flush water quantity, flush water pressure, and blades¡¯ space.
• Nozzle performance testing device
Atomizing performance of nozzles have an important impact on desulfurization efficiency. Nozzle material affecting stable operation of the system must be corrosion and wear resistant, including high aluminium porcelain and silicon carbide etc.
Spray liquid (clean water) in the underground pool is pumped into nozzles by a centrifugal pump through an electromagnetic flowmeter and flows back to the pool after being sprayed. Pressure gauges are installed before each nozzle for monitoring pressure of liquid running to nozzles. The electromagnetic flowmeter measures flow rate. The spray angle and spraying uniformity are measured by a water distribution device. The laser particle size analyzer collects droplets sample and does analysis by a computer.
This test bed is used to do the following work: evaluate spraying performance (including pressure, runoff, spraying uniformity, spray angle and particle size distribution) of grout nozzles for wet FGD; assess interaction of multiple nozzles when arranged in different way; study atomization performance relationship between clean water and absorbent grout. It also provides basis for performance detection of nozzle products and trial products and for design, manufacture and operation.
Scientific research achievements
Seawater FGD technology and demonstration project of large coal fired power plant
Wet FGD and denitrification integration technology and demonstration project of large coal fired power plant
Desulfurization technology applied in "three boilers-one tower, one boiler peak-shaving "
Localization development of demisters, the key equipment of wet FGD
FGD technology with wastes reused (listed in the national 863 Plan)
FGD technology and equipment engineering of large coal-fired power plants (listed in the national 863 Plan under the ¡°Tenth-Five Years Plan¡±)
Localization of wet FGD complete equipment for large coal-fired power plants
Study of key technologies for FGD industrialization of CFB
Study of philosophy of water promote desulfurization under normal temperature (listed in the national 973 program)
Study of technical policies and index of SO2 and NOX emissions from thermal power plants
Study of SO2 control for the thermal power plant of Xinjiang Power Company Desulfurization technology and equipment study of water film precipitators for small and medium-sized coal-fired power plants (listed in the key sci-tech program under the ¡°Ninth-Five Years Plan¡±)
Studyof control technology and equipment of pollution control of SO2 in flue gas from coal combustion
Experimental study of enhanced wet limestone FGD process
Simple wet desulfurization for Venturi water film precipitators
Experimental study of absorbent and additive performance and desulfurization residues utilization for the desulfurization process of furnace calcium injection
Study of seawater desulfurization process
Study of SO2 emissions and corresponding control measures for coal-fired power plants in Jiangsu Province
Technical and economic evaluation of the FGD process of CFB
Technical Application
EIA of base stations within the existing network of Guangxi Limited Company of China Mobile Communications Corporation, located in Guangxi
EIA of Nanning base stations, Phase II project of expanded TD£SCDMA of Limited Company of China Mobile Communications Corporation, located in Nanning of Guangxi
Electromagnetic radiation EIA of Jiantou base station (in Tai¡¯erzhuang Village ) of Shandong Limited Company Zaozhuang Branch, China Mobile Communications Corporation, located in Zaozhuang of Shandong Province
Electromagnetic radiation EIA of Jiantou base station (in Tai¡¯erzhuang Village ) of Shandong Limited Company Zaozhuang Branch, China Mobile Communications Corporation, located in Zaozhuang of Shandong Province
Electromagnetic radiation EIA of Wuyang Street base station (in Banquan Township, Ju¡¯nan County ) of Shandong Limited Company Linyi Branch, China Mobile Communications Corporation, located in Linyi of Shandong Province
Environmental equipment operation in Beilun, Zhenhai, Wenzhou and Yueqing power plants of Zhejiang Provincial Energy Corporation
Desulfurization performance experiment for No.4 and 5 units of Jiangsu Xutang Power Limited Company
Performance experiment for the ESP in Hengtai Wansheng Power Plant of Guodian Chongqing Company
Performance testing for EPC general contract engineering of FGD island of Phase II 2¡Á300MW units of Shiheng Power Plant under Shangdong China Electric Power Company
Performance testing for FGD devices of 2¡Á300MW+2¡Á200MW units in Yangzonghai Power Limited Company of Guodian Yun¡¯nan Company
Performance testing for FGD devices of 8¡Á300MW units in Zhangjiakou Power Plant of Datang International Coporation
Performance testing for FGD devices of No. 3~No.6 boilers in Douhe Power Plant of Datang International Coporation
Performance testing for FGD devices of No.1~No.4 boilers in Shizuishan Power Company of Guodian Ningxia Company
Performance testing for wet lime/limestone desulfurization project of the 2¡Á300MW units in Hanchuan First Power Limited Company of Guodian Changyuan Company
Performance testing for the 2¡Á600MW unit FGD project in Yuncheng Power Limited Company of Shanxi Datang International Company
Performance testing for the FGD system of 2¡Á125MW units in Guizhou Zunyi Power Plant
Performance testing for the FGD system of 4¡Á200MW units in Shanxi Datong Second Power Plant
Performance testing for the FGD system of 1¡Á300MW unit in Hebei Hengfeng Power Company
Performance testing for the FGD system of 2¡Á600MW units in Zhejiang Beilun Power Company
Performance testing for the FGD system of 2¡Á1000MW units in Guodian Taizhou Power Limited Company
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