Technology and system for synergistically processing zinc-containing waste paint slag and vinasse and recovering zinc

A technology of co-processing and waste paint, which is applied in the direction of gasification process, petroleum industry, process efficiency improvement, etc., can solve the problems of large environmental impact, improve thermal efficiency, solve the problem of low calorific value of pyrolysis gas, and improve adaptability Effect

Pending Publication Date: 2017-10-24
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that most painters with more than 10 years of service have symptoms of cough, fatigue, headache, chest tightness, and weakness of limbs, and the proportion of serious diseases such as aplastic anemia, leukemia, tuberculosis, and pleurisy is also quite high. A reasonable way to deal with zinc-containing waste paint slag, most of which are disposed of by burning, which has a great impact on the environment

Method used

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  • Technology and system for synergistically processing zinc-containing waste paint slag and vinasse and recovering zinc
  • Technology and system for synergistically processing zinc-containing waste paint slag and vinasse and recovering zinc
  • Technology and system for synergistically processing zinc-containing waste paint slag and vinasse and recovering zinc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] After using a separate feed such as Figure 4 , Figure 5 In the layered distribution method shown, distiller's grains and zinc-containing waste paint slag are transported to the rotary bed pyrolysis device by separate pipelines for pyrolysis, and the pyrolysis temperature control in the rotary bed pyrolysis device adopts a partition control method. The temperature of each interval is 700°C in zone 2, 800°C in zone 2, 900°C in zone 3, 1000°C in zone 4, and 1000°C in zone 4. The total pyrolysis time is controlled at 80 minutes.

[0059] The mixed material passes through the above four sections sequentially in the rotary bed pyrolysis device, and then completes the process of drying, cracking and coordinated thermal cracking. The organic matter in distiller's grains and zinc-containing waste paint slag is cracked into small molecule combustible gas, tar and water vapor under high temperature and anaerobic conditions. Among them, the metal oxide of zinc-containing waste p...

Embodiment 2

[0063] use Image 6 In the distribution method shown, the distiller's grains and zinc-containing waste paint slag are pre-mixed and stirred before being put into the furnace, and then sent to the rotary bed pyrolysis device by the common conveying pipeline. Complete and uniform mixing in the pyrolysis device. The pyrolysis temperature control in the rotary bed pyrolysis device adopts the zone control method, and the temperature of the four zones are respectively 700°C in zone Ⅰ, 800°C in zone Ⅱ, 800°C in zone 3, 900°C in zone Ⅲ, and 1000°C in zone Ⅳ. , the total pyrolysis time is controlled at 80min. Subsequent steps are processed in the same manner as in the previous embodiment to obtain Image 6 The zinc oxide recovery rate of the material distribution method is 99.9%, and the heat input of the direct-fired boiler accounts for 73% of the heat of the dry material.

Embodiment 3

[0065] A zinc-containing waste paint slag and distiller's grains co-processing zinc recovery process, which includes:

[0066] 1) Distiller's grains and zinc-containing waste paint slag are transported to the rotary bed pyrolysis device by a separate pipeline for distribution. The distribution method is that the distiller's grains 7 are on the top and the zinc-containing waste paint residue 8 is on the bottom. After the distribution, it is pyrolyzed and rotated. The pyrolysis temperature control in the bed pyrolysis device adopts the partition control method. The temperature of the four intervals is 600 °C in area Ⅰ, 750 °C in area Ⅱ, 850 °C in area Ⅲ, 950 °C in area Ⅳ, and 950 °C in area Ⅳ. The total solution time was controlled within 60 minutes. The mixed material passes through the above four sections sequentially in the rotary bed pyrolysis device, and then completes the process of drying, cracking and coordinated thermal cracking. In zone IV of the furnace, all the meta...

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Abstract

The invention provides a technology and system for synergistically processing zinc-containing waste paint slag and vinasse and recovering zinc. The technology comprises the following steps: distributing zinc-containing waste paint slag and vinasse into a rotating bed pyrolysis device and carrying out pyrolysis, so that zinc-containing mixed oil gas is obtained; introducing the zinc-containing mixed oil gas into a direct-fired boiler to be burned, so that first zinc-containing flue gas is obtained; and cooling the first zinc-containing flue gas and then recycling by virtue of a dust removal device, so that high-purity zinc oxide and second flue gas are obtained. The technology for synergistically processing the zinc-containing waste paint slag and vinasse and recovering zinc has the advantages that the problem that resourceful treatment is difficult to carry out on a large amount of vinasse is effectively solved, a new way is found for treatment of hazardous waste such as the zinc-containing waste paint slag, a vinasse and paint slag synergistic hydrolysis way is adopted in a hydrolysis reaction process, not only is the problem that the vinasse and paint slag are difficult to treat solved, but also the defects that calorific value of pyrolysis gas is low when the vinasse is hydrolyzed alone and pyrolysis time is long when the paint slag is hydrolyzed alone are solved, and recovery of metal zinc is also realized, so that economy of the whole system is obvious.

Description

technical field [0001] The invention relates to the technical field of solid waste and hazardous waste treatment, in particular to a process and system for co-processing zinc-containing waste paint slag and distiller's grains to recover zinc. Background technique [0002] The output of my country's liquor industry is huge, which brings a large amount of distiller's grains discharged every year. Statistics show that the annual discharge of liquor distillers' grains in my country can reach 30 million tons. Because its water content and acidity are relatively high, it is difficult to transport, and it is easy to rot and deteriorate. When it is directly used as feed, its palatability is poor, so it is difficult to be widely promoted. At present, only a small part is used for the processing of feed and chemical raw materials. Due to the high alcohol concentration and high crude fiber content of distiller's grains, it is easy to cause indigestion in livestock, causing constipation...

Claims

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Application Information

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IPC IPC(8): C10B53/00C10B47/30C10B47/44C10B57/00C10B57/04C10B57/10C10J3/60C22B19/30
CPCC10B47/30C10B47/44C10B53/00C10B57/005C10B57/04C10B57/10C10J3/60C10J2300/1606C22B19/30Y02P10/20
Inventor 王鹏飞贾懿曼张亚飞陶进峰王江华李斌吴道洪
Owner SHENWU TECH GRP CO LTD
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