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Process and system for recovering zinc via synergistic treatment with zinc-containing waste paint slag and distillers' grains

A technology for co-processing and waste paint, applied in the petroleum industry, process efficiency improvement, special form of dry distillation, etc., can solve problems such as large environmental impact, avoid high-temperature corrosion, improve adaptability, and prolong service life.

Pending Publication Date: 2017-11-24
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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  • Process and system for recovering zinc via synergistic treatment with zinc-containing waste paint slag and distillers' grains
  • Process and system for recovering zinc via synergistic treatment with zinc-containing waste paint slag and distillers' grains
  • Process and system for recovering zinc via synergistic treatment with zinc-containing waste paint slag and distillers' grains

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 450°C in zone I, 450°C in zone II, 500°C in zone II, 650°C in zone III, 700°C in zone IV, and 700°C in zone IV. 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, water vapor, and pyrolytic carbon under high-temperature and anaerobic conditions. Among them, th...

Embodiment 2

[0067] 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, the temperature of the four zones are respectively 400°C in zone Ⅰ, 500°C in zone Ⅱ, 600°C in zone Ⅲ, 600°C in zone 4, and 700°C in zone Ⅳ. , the total pyrolysis time is controlled at 80min.

[0068] Subsequent steps are processed in the same manner as in the previous example to obtain the following specific experimental data and illustrate the advantages of mixed pyrolysis.

[0069] When distiller's grains are pyrolyzed alone, the heat value of pyrolysis gas is 3439kcal / m 3 , when zinc-containing waste paint slag is pyrolyzed separately, the heat value of pyrolysis gas...

Embodiment 3

[0072] A zinc-containing waste paint slag and distiller's grains co-processing zinc recovery process, which includes:

[0073] 1) The distiller's grains and zinc-containing waste paint slag are transported to the rotating bed pyrolysis device through a separate pipeline for such Figure 4 The way shown is cloth, and after the cloth is pyrolyzed, the pyrolysis temperature control in the rotary bed pyrolysis device adopts a partition control method, and the temperatures in the four intervals are 300°C in zone Ⅰ, 300°C in zone Ⅱ, 450°C in zone 3, and 450°C in zone Ⅲ. 4 The temperature is 550°C, the temperature in Zone Ⅳ 5 is 650°C, and the total pyrolysis time is controlled at 60min. 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 metal zinc reduced in zone IV of the furnace will not be discharged into the rotary bed pyrolysis device...

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Abstract

The invention provides a process and a system for recovering zinc via synergistic treatment with zinc-containing waste paint slag and distillers' grains. The process comprises the following steps: performing material distribution and pyrolysis on the zinc-containing waste paint slag and the distillers' grains in a revolving bed pyrolysis device to obtain pyrolytic oil gas and zinc-containing pyrolytic carbon; introducing the zinc-containing pyrolytic carbon into a direct combustion boiler for combustion to obtain zinc-containing smoke dust; collecting the zinc-containing smoke dust with a dust collector to obtain zinc oxide and pyrolysis ash. The process for recovering zinc via synergistic treatment with the zinc-containing waste paint slag and the distillers' grains effectively solves the problem that a large quantity of distillers' grains are difficult to be treated resourcefully, and also finds a new way for treatment of hazardous wastes such as the zinc-containing waste paint slag at the same time; by adopting zinc-containing hazardous wastes as a catalyst, effective treatment of the hazardous wastes can be achieved, the problem that the distillers' grains and paint slag are difficult to treat is solved, and the defects of low caloric value of pyrolytic gas when the distillers' grains are pyrolyzed separately and a long pyrolysis time when the paint slag is pyrolyzed separately are solved; moreover, the recovery of metal zinc is achieved, and the overall economical efficiency of the system is significant.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B47/30C10B47/44C10B57/04C22B7/00C22B19/00
CPCC10B47/30C10B47/44C10B53/00C10B57/04C22B7/00C22B19/00Y02P10/20
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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