Applicable scope
Printed circuit board manufacturing developed regions contain copper etching centralism develops comprehensive utilization of waste.
Main technical content
A, the basic principle
Will the alkaline etching waste printed circuit board with acidic chloride with copper etching waste liquid precipitation, generated alkali type chlorinated copper precipitation used in the production of industrial copper sulfate; Precipitation of filter press for production alkaline etching liquid mother liquor; The rest of the wastewater treatment by metal aluminium crumbs replacement, remove copper ions evaporation and concentration production mix ammonium salt. The other will chloride-ferric chloride etching waste liquid cast iron mention copper after rectifying evaporation and concentration, the chlorine and generate chloride-ferric chloride back for PCB etching.
Second, key technology
Copper sulfate, alkaline etching fluid, mixed ammonium salt, chloride-ferric chloride comprehensive utilization production technology and production line.
Typical scale
1, use alkaline, acidic etching waste liquid 10,000 tons/year, production industry-specific copper sulfate 4,000 tons/year, alkaline etching liquid 4,000 tons/year, mixed 1200 tons of ammonium sulfate, wastewater treatment, 50 tons of copper powder;
2, using chloride-ferric chloride etching waste liquid 3,000 tons/year, production chloride-ferric chloride etching liquid 4,000 tons/year, chloride-ferric chloride wastewater treatment copper powder 150 tons.
Main technical indicators and conditions
A, technical indices
(a) liquid resources utilization
1, copper utilization rate
Alkaline, acidic etching waste liquid 99.5%; Chloride-ferric chloride etching waste liquid: 95%
2, ammonia (nh4) utilization: 100%.
3, chloride-ferric chloride utilization: 100%.
(2) product index and performance
CuSO4? 5H2O copper sulphate (), alkaline etching fluid, mixed ammonium salt, copper powder, chloride-ferric chloride etching fluid
Second, the requirements
1, alkaline, acidic etching waste liquid use: occupies an area of 5000 square meters; Copper sulfate production consumption 200,000 degrees/year, water consumption 6000 tons/year, strong sulfuric acid 2,000 tons/year; Alkaline etching fluids production consumption 1.52 million degrees/year, no water consumption, liquid ammonia 350 tons/year, industrial ammonium chloride 400 tons/year; Ammonium salt recycling consumption 5.61 million degrees/year, water consumption 6000 tons/year, diesel 580 tons/year.
2, chloride-ferric chloride etching waste liquid use: covers an area of 2000 square meters, consumption 2.2 million degrees/year, water consumption 138 million tons/year, liquid chlorine 246 tons/year, pure iron 415 tons/year, diesel 40.8 tons/year.
Main equipment and operation management
One, the main equipment
1, alkaline, acidic etching waste liquid use:
Copper sulfate line, alkaline etching liquid production line, mix the ammonium salt production line.
2, chloride-ferric chloride etching waste liquid use:
Copper powder production line, chloride-ferric chloride regeneration production line.
2, operation management
Two kinds of waste liquid organizers must respectively, and from the collector with liquid generated to the storage, collector, comprehensive utilization process ensure that no other liquid (including contain copper dilute wastewater) adding;
Investment and benefit analysis
A, investment conditions
(a) alkaline, acidic etching waste liquid use
With a total investment (including civil, 1998 price) is 10 million yuan
Among them: the equipment investment of 300 million yuan, copper sulfate production line, line of 100 million alkaline etching liquid, ammonium salt recycle production line of 200 million yuan, transport vehicles 80 million
Main equipment life (boiler except) for five years
The investment capital can be recovered 1.5 years
(2) chloride-ferric chloride etching waste liquid use
With a total investment (1998 price) 3m yuan
Among them: the equipment investment is 150 million yuan
Main equipment life 5 years (boiler except)
The investment capital can be recovered in 2 years
Second, economic benefit analysis
(a) alkaline, acidic etching waste liquid use
1, annual produce $23.5 million
2, cost 17 million yuan
3, the profit for the year of 6.5 million yuan
(2) chloride-ferric chloride etching waste liquid use
1, annual: 470 million yuan;
2, cost: 320 million yuan;
3, net benefits: 150 million yuan.
Three, environmental benefit analysis
Through concentrated use and processing contain copper etching waste liquid, greatly contributed to the etching, efficient utilization of waste for the market to provide quality products and copper sulfate (powder) raw material in China, slowing the mining of copper resources pace. Also for printed circuit board industry provide inexpensive alkaline etching fluid and chloride-ferric chloride etching liquid, recycling ammonia nitrogen, chloride-ferric chloride resources, effectively cut etching waste liquid ammonia nitrogen, iron pollutants in the emissions, in order to promote the sustainable development of printed circuit board industry plays very important role.
Promotion, and customer opinion
A, promotion
The entire set of technique of industrial waste by shenzhen ChuLiZhan after over 10 years were research and development success and first in used, no.14 by many technological innovation matures complete, achieved very good economic benefits and environmental, social efficiency, in order to guarantee the coordination of shenzhen economic and environmental sustainable development to make the contribution. In 1998, the copper sulfate, alkaline etching fluids production technology compensatory transfer to kunshan, jiangsu province strong local environmental governance forward and a sustainable development work.
Second, user opinion
Shenzhen industrial waste ChuLiZhan production of good quality, product demand magnesiumzinc; Alkaline etching fluid, chloride-ferric chloride etching liquid current month yields more than 400 tons, respectively, the product in 300 tons in shenzhen and dongguan is home to more than twenty circuit manufacturers use, welcome. The project has achieved remarkable economic, environmental and social benefits.