1. technical name

Technology for producing syngas by melting high-concentration organic waste liquid at high temperature.

2. scope of application

For the treatment of high-concentration organic waste liquid produced by fine chemical, pharmaceutical, printing and dyeing enterprises, the total chlorine and fluorine content of the raw materials mixed into the furnace is less than 6000mg/L.

3. technical content

3.1 technical principle

Organic waste has a wide range of sources, complex components, different organic matter content, and large differences in characteristics. Low-concentration organic waste liquid and raw coal (organic solid waste) are prepared into slurry. The high-concentration organic waste liquid is directly gasified through a gasification burner through a closed conveying system. The slurry/high-concentration organic waste liquid and pure oxygen undergo high-temperature cracking and gasification reactions under high temperature conditions to generate high-temperature crude synthesis gas with CO and H2 as main components. In the reducing atmosphere, S is mainly converted into H2S and N is converted into N2. Ash in raw coal and salt-containing components in organic waste are transferred to liquid slag at high temperatures.

3.2 main innovations

Based on the research on wet entrained flow coal gasification technology, this technology organically combines high-concentration organic waste liquid treatment with wet entrained flow gasification technology, and proposes a technical route for green treatment and resource utilization of organic waste-coal gasification.

4. Pollution control or environmental restoration effects

The organic matter conversion rate is ≥ 99.99%, and the CO+H2 volume content can reach more than 80%. Compared with conventional coal gasification technology of the same scale, it saves 10%~ 50% of raw coal, saves 50%~ 100% of pulping water, the hot burning loss rate of discharged residue is less than 5%, and the acid dissolution loss rate is less than 3%. The content of harmful substances and acid leaching harmful substances meet national standards, and the external drainage water is recycled after treatment.

5. Technology demonstration

The demonstration project of Zhejiang Fengdeng Green Energy Environmental Protection Co., Ltd. for the collaborative disposal of organic waste by high-temperature melting of coal slurry, which disposes about 200 tons of various organic waste per day and produces an annual output of 30,000 tons of synthetic ammonia. The multi-channel process nozzle technology ensures the liquid waste, slurry and oxygen. The full mixing and atomization of slurry effectively improves the conversion efficiency of slurry. After the device is put into operation, the operation is stable. After testing, when the addition amount of high-concentration organic waste liquid is 30% of the slurry addition amount (in the multi-channel nozzle, the addition amount can be adjusted between 10% and 50%), the synthetic ammonia raw material decreases by about 20%, and the carbon conversion rate in the slurry increases by 1%.

6. investment estimation

Based on the calculation of a newly built gasification unit that collaborates to process 60,000 tons/a organic waste liquid, the investment in the gasification system is about 63 million yuan, and the investment in supporting air separation equipment is about 35 million yuan.

7. investment recovery period

Calculated based on the coordinated disposal of 60,000 tons of medical waste liquid by a 50,000-ton synthetic ammonia gasification unit, the payback period is 2.75 years.

8. Prospects for transformation and promotion of technological achievements

This technology can dispose of waste liquids and solid waste in the petroleum, pharmaceutical, chemical and printing and dyeing industries on a large scale, and synthesize chemical products such as methanol and ammonia through resource utilization, realizing clean treatment of organic waste and resource utilization, effectively reducing the consumption level of gasification raw materials, and has broad market prospects in the field of energy and chemical industry.