Taihua High-tech Dyeing and Finishing (Jiaxing) Co., Ltd. invested more than 9 million yuan to expand and renovate the sewage pretreatment system in 2013，It mainly increases the height and expands the capacity of the original biological pool，New regulation tank, primary sedimentation tank, hydrolytic acidification tank and biological sedimentation tank，Retain the original regulating tank and initial settling tank，It is used as the reuse source pool and the final settling pool after the transformation。After the expansion, the sewage treatment capacity reached 10000t/d, and the two-stage physicochemical and two-stage biochemical treatment processes were adopted for treatment. The effluent quality reached the indirect emission limit of Table 2 in the "Textile Dyeing and Finishing Industry Water Pollution Discharge Standard", and the reuse rate was ≥55%。2018年，With the expansion of capacity，The company invested more than 20 million yuan to upgrade and expand the sewage treatment system again，The original processing capacity of 10000t/d was increased to 13500t/d, and the amount of reclaimed water was increased to 9000t/d，Sludge production was reduced from 40t/d to 20t/d。
Investment: 9.6 million RMB
Daily processing capacity 13,500 tons
Recovery rate ≥55%
Reduce wastewater discharge
Clean Energy Alternatives Project - Steam replaces thermal oil
The company currently has 7 molding machines，The heat transfer oil is heated by two heat transfer oil boilers，Now all the transformation into medium temperature and pressure steam for heating，Steam is supplied by the company's 35T/h circulating fluidized bed boiler，The operation is stable after modification，Production efficiency has been significantly improved，The use of the entire energy ladder is also relatively perfect，Improved energy efficiency by 28.The company's two thermal oil furnaces were also phased out by the end of December 2014。The energy saving effect of the project is very obvious, the annual energy can save 1747 tons of standard coal, reduce sulfur dioxide 19.Five tons, 15 soot.2吨。
Investment: RMB 3 million
Improved energy efficiency by 28.3%
Coal saving: 1788 tons/year
CO reduction2排放：19.5吨/年
Reduction of nitrogen oxide emissions: 45.8吨/年
Reduce soot emissions: 15.2吨/年
Waste gas treatment
1, the setting machine supporting finalize exhaust gas treatment facilities treatment process are finalize exhaust gas collected into the "water spray + two high voltage electrostatic" purification device purification treatment through 15m high exhaust cylinder discharge，Collection rate 98%，The fume purification rate is above 90%, and the removal rate of particulate matter is 80%;The emission concentration of pollutants such as exhaust fumes and particulates of the molding machine can reach the emission limit of newly built enterprises in Table 1 of the Emission Standard for Atmospheric Pollutants of Textile Dyeing and Finishing Industry (DB33/962-2015)，Oil smoke ≤15 mg/m3，Particulate matter ≤15 mg/m3。
2. Some fabrics after dyeing and finishing by the company need coating，Exhaust gas is produced during coating and drying，The coating waste gas is collected and then treated with a five-stage water absorption + activated carbon treatment device (the removal rate of dimethylformamide, toluene and butanone reaches 95%).，The treated exhaust gas is sent to the boiler of the Ministry of Energy for thermal incineration through the duct，After 80 meters high discharge standard。根据SGS通标标准技术服务(上海)有限公司对涂层废气的检测，二甲基甲酰胺、苯系物、VOCs等污染物的有组织排放浓度分别为<0.01mg/m3, 4.17mg/m3 and 0.258mg/m3, all lower than the emission limits of new enterprises in Table 1 of the "Emission Standards for Atmospheric Pollutants of Textile Dyeing and Finishing Industry" (DB33/962-2015)。
3、2017年，The company has carried out low-nitrogen technical transformation of two boilers，It mainly changes the structure of the boiler air distribution plate, secondary air tuyere, increases the water cooling screen, gas recirculation, and the equipment of polymer out of stock in the furnace，Effectively reducing the original boiler nox emission concentration from 387mg/m³ to 150 mg/m³。
4. Our company covers and collects the polluted gas produced in the treatment of sewage by acidizing tank, aerobic biological tank, sludge thickening tank and sludge press filtration room in the dyeing and finishing sewage，The collected polluted gas is chemically washed，Ammonia, hydrogen sulfide, volatile organic matter, dust and other pollutants in the gas are dissolved, neutralized, oxidized and adsorbed with the spray solution, and then mixed with the added fresh water for recycling。The gas enters the UV after dehydration
光催化净化处理彻底除臭后硫化物<0.33kg/h
氨<4.9kg/h
臭气浓度<2000
It has no dimension and is discharged into the atmosphere through an altitude cylinder of 15 meters after reaching the emission standard。
Comprehensive energy utilization technical reform project
The company's 6MW condensate turbine generator unit was shut down in November 2017。Due to the increase of the company's capacity，The company plans technical reform projects for comprehensive utilization of energy，It is intended to utilize the heat energy of the existing boiler，Impulse turbine drives large air compressor，The steam after the work is done maintains the existing heat supply，Use pipe network to send to each user，When completed, the station will replace 38 existing small electric compressors，Annual saving of standard coal 5000 tons，To achieve the purpose of saving energy, convenient operation and management, stable and reliable gas supply。
Steam drives air compressors and air conditioning systems instead of electricity
Reduction of CO2 emissions: 8,000 tons/year
Distributed rooftop PV project
On September 28, 2016, the company installed a total of 5 on the roof of the plant.The 43MW photovoltaic power generation roof was successfully connected to the grid on July 18, 2017. After that, the construction of photovoltaic projects was gradually increased. By September 2022, the Group's Xiuzhou base in Jiaxing, Zhejiang Province, was installed15.823MW PV roof;In January 2024, the base in Huaian, Jiangsu, 16.95MW solar photovoltaic project connected to the grid。
Reuse of wastewater from textile loom
The company introduced foreign water-saving water-jet loom，At the same time, two sets of wastewater treatment equipment were established，The processing capacity is 6000t/d，A 7500t/d sewage treatment system is used to treat production wastewater，After treatment, 90% of the wastewater is reused for production，10% into Jiaxing sewage network，Reduce the discharge of waste water，Saving water consumption。
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