The most popular advanced coating process and thre

2022-08-02
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SAIC Zhengzhou plant advanced coating process and three wastes treatment technology R & D, production and sales of spare parts (including engine, gearbox, power transmission, chassis, interior and exterior decoration, electronic appliances, etc.), automobile service trade business such as logistics, on-board information, used cars, and automobile finance business. The main automobile enterprises of SAIC include passenger car company, SAIC Maxus, SAIC Volkswagen, SAIC GM, SAIC GM Wuling, Nanjing Iveco, SAIC Iveco Hongyan, Shanghai Shenwo, etc. In 2017, SAIC Group sold 6.9301 million complete vehicles, a year-on-year increase of 6.8%. In 2018, it sold 7.052 million vehicles, a year-on-year increase of 1.8%. The independent brands performed well, and the annual sales volume of the group increased slightly, far better than that of the industry

the passenger car company of Shanghai Automotive Group Co., Ltd. is the only entity providing R & D, production, manufacturing, sales and related services for the independent brand passenger car products subordinate to SAIC Motor Group. The products cover a wide range of fields such as medium and high-end vehicles, popular vehicles and off-road vehicles. It has established a good brand image and formed a A wide range of product lines covering all mainstream segments of the passenger car industry

in February 2017, SAIC passenger car company, following Shanghai Lingang and Nanjing, Jiangsu, registered and established the passenger car Zhengzhou branch of Shanghai Automotive Group Co., Ltd. (hereinafter referred to as SAIC Zhengzhou Branch) in Zhengzhou, Henan Province, to build a Zhengzhou vehicle production base with a target annual production capacity of 300000 vehicles. At present, the "production base project with an annual output of 200000 passenger cars of SAIC Motor Corporation Zhengzhou branch" (phase I project) has been completed. By the end of 2017, SAIC passenger car company had been able to regenerate 640000 vehicles to produce crystallization areas, thus losing transparency performance (including 160000 for port base, 280000 for Pukou base and 200000 for Zhengzhou base)

240000 new production capacity

SAIC Group, in combination with the enterprise's production capacity demand during the 13th Five Year Plan period, negotiated with Zhengzhou municipal government and the economic development zone government, signed the framework agreement on SAIC passenger car Zhengzhou base phase II project in Shanghai in January, 2018. Based on the existing conditions of SAIC Zhengzhou base, The "new 240000 unit capacity project of SAIC passenger car company Zhengzhou branch" will be constructed to meet the development needs of SAIC passenger car business

with the promotion of Zhengzhou government and SAIC Group, many parts production suppliers have also established around SAIC Zhengzhou plant, and achieved information linkage, greatly saving transportation costs and time

SAIC also introduced that this factory is the most intelligent automobile factory in China. The reason why SAIC is so confident is that in the process of vehicle production, this factory has reached a very high degree of automation and intelligence. The process design of each workshop integrates the advanced technology of domestic and foreign passenger car industry, and adopts environmental protection process and international quality control

painting workshop

process flow diagram of painting workshop

in the fully enclosed painting workshop, there are 44 robots (8 glue spraying and 36 paint spraying), and their division of labor is clear to achieve 100% high automation of the painting process. At the same time, with the cooperation of 26 paint mixing systems, it can meet the spraying requirements of 14 colors of vehicle paint

in order to reduce the environmental pollution caused by the painting process, the vehicle paint adopts the formula of water-based environmental protection paint of international famous brands, and the wall of the painting workshop also adopts thermal insulation materials, with the infrared reflectance of more than 94%, reducing the energy consumption of the refrigerator by 25%; Wet circulating air technology is adopted for the process air conditioning in the paint booth, with an application rate of more than 36%, and the overall operation energy consumption is reduced by about 20%. In the drying room, RTO and VOC concentration runner treatment equipment are used, and the VOC removal rate of waste gas emission is up to more than 90%, realizing green emission

treatment measures for three wastes

1. Prevention and control measures for surface water pollution: the factory's wastewater mainly includes mold cleaning wastewater, silane waste liquid and wastewater, degreasing waste liquid and wastewater, electrophoresis waste liquid and wastewater, painting waste water, skid cleaning waste water, polishing waste water, rain test waste water, domestic sewage and clean sewage. The mold cleaning wastewater is pretreated in the "intermittent reaction tank" and mixed with degreasing waste liquid (water), silane waste liquid (water), electrophoresis waste liquid (water), painting waste water, rain test waste water, etc., and is pretreated by "Two-stage Coagulation Sedimentation"; The pretreated production wastewater is mixed with domestic sewage, especially corrosive wear water, and treated by the process of "hydrolytic acidification + biological contact oxidation + inclined plate sedimentation" and then mixed with clean sewage, which is discharged into the regional sewage treatment plant for further treatment

2. Prevention and control measures for atmospheric environment pollution: the waste gas of the plant mainly includes welding waste gas, spraying waste gas, drying waste gas, drying room burner waste gas, final assembly and paint repair waste gas, gas boiler waste gas, etc. The welding waste gas passes through the gas collecting hood set above the welding station, and is uniformly collected by the fan exhaust and then treated by the soot purifier; The painting workshop adopts a dry-type carton paint booth. The paint mist (mainly resin, pigment and other solid substances) generated in the paint booth contacts with the carton through the dry-type carton system, is absorbed and attached to the carton surface by the carton, and then is filtered by the bag filter. After being filtered by the carton, the painting exhaust gas from each paint booth, the volatile organic exhaust gas from the gun cleaning solvent, the hot flash drying exhaust gas of the finish coat and the exhaust gas from the finishing paint leveling room converge, Return to the paint booth for concentration by circulating fan and then enter a set of RTO incinerator for treatment (natural gas is used as heat source); The organic waste gas from the touch up room and paint mixing room is adsorbed and purified by the activated carbon adsorption device; A set of RTO incinerator is used to treat the waste gas from electrophoresis drying, glue drying and surface coating (including shading) drying; The burners for flash drying and drying rooms use natural gas as fuel, and the waste gas is directly discharged. The paint repair waste gas from the final assembly is collected and treated by the activated carbon adsorption device; The gas-fired boiler adopts low nitrogen combustion technology

3. Prevention and control measures for solid waste pollution: the hazardous solid wastes in the plant mainly include waste hydraulic oil, waste paint residue and waste paper box filter, waste activated carbon, oil slick in degreasing process, waste paint residue, silane residue, waste solvent, physicochemical sludge, waste gloves and waste rags (containing oil), etc. the hazardous wastes are sent to qualified units to slowly open the oil delivery valve for treatment; Recycling of stamping waste and various packaging waste; Domestic waste and sludge shall be sent to the landfill for treatment

the products of the factory are Roewe series passenger cars independently developed by SAIC, including the hatchback car on ap31 platform, MPV on im31 platform and the 7-seat SUV of a+ architecture model under development. After the project is completed, it can produce 240000 complete vehicles per year

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