CN111996365A

CN111996365A - Efficient and environment-friendly waste oil sludge disposal method

Info

Publication number: CN111996365A
Application number: CN202010785285.XA
Authority: CN
Inventors: 田宝山; 李维浩; 陈若平
Original assignee: Xinjiang Bayi Iron and Steel Co Ltd
Current assignee: Xinjiang Bayi Iron and Steel Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-11-27

Abstract

The invention discloses a high-efficiency environment-friendly waste oil sludge treatment method, which comprises the following steps: 1. collecting dust removal ash, iron scale and sludge of a steel plant as base materials, adding 5% of waste oil, and preparing a mixture into oil sludge balls by using a special granulator, wherein the oil sludge balls comprise the following components in percentage by weight: 32% of sludge, 12% of coarse ash, 45% of iron scale, 5% of lime foam, 6% of a binding agent and 5% of grease; 2. adding the prepared oil sludge balls into a gasification furnace according to 2-5% of the total amount of raw materials fed into the furnace through a raw material conveying system of the Ou smelting furnace; 3. after the oil sludge pellets enter a gasification furnace, under the temperature of about 1050 ℃ of the arch crown of the gasification furnace and the reducing atmosphere, the oil sludge is thermally cracked and decomposed into reducing gases CO and H required by an Ou-metallurgy shaft furnace₂And after the gas enters the shaft furnace, the iron ore in the shaft furnace is reduced into metallic iron, so that the resource conversion and utilization of the oil sludge are realized.

Description

Efficient and environment-friendly waste oil sludge disposal method

Technical Field

The invention relates to a high-efficiency and environment-friendly waste oil sludge treatment method.

Background

At present, the treatment and disposal of the sludge-containing waste are still in the research and exploration stage in China, most of the oil sludge generated in the present stage is treated by a special hazardous waste treatment center by intensively adopting the processes of pyrolysis, incineration and the like, the treatment cost is high, the resource recycling efficiency is low, and the risk of secondary pollution exists. Some enterprises adopt illegal disposal methods such as illegal emission due to high disposal cost. Causing serious pollution to the environment in an irreversible way. The development and exploration of a novel efficient low-cost oil sludge treatment technology are extremely urgent. The European furnace ironmaking process is the largest non-blast furnace ironmaking process in the world nowadays, can directly use non-coking coal to produce molten iron, and breaks through the dependence of traditional blast furnace ironmaking on coking coal resources. The emission indexes of SO2, benzene, ammonia, phenol, nitrogen oxides and the like of the waste gas are superior to those of a blast furnace, the pollution is greatly lower than that of the blast furnace, and the waste gas has incomparable advantages in environmental protection. Into useful gas.

Disclosure of Invention

The invention aims to provide an efficient and environment-friendly waste oil sludge treatment method, which can reduce the ironmaking coke ratio by 20kg/t, has remarkable economic benefit, realizes safe and environment-friendly treatment of oil sludge, and realizes the aim of recycling the oil sludge.

The invention aims to realize the method, which is an efficient and environment-friendly waste oil sludge disposal method, and comprises the following steps: 1. collecting dust removal ash, iron scale and sludge of a steel plant as base materials, adding 5% of waste oil, and preparing a mixture into oil sludge balls by using a special granulator, wherein the oil sludge balls comprise the following components in percentage by weight: 32% of sludge, 12% of coarse ash, 45% of iron scale, 5% of lime foam, 6% of a binding agent and 5% of grease; 2. adding the prepared oil sludge balls into a gasification furnace according to 2-5% of the total amount of raw materials fed into the furnace through a raw material conveying system of the Ou smelting furnace; 3. after the oil sludge pellets enter a gasification furnace, under the temperature of 1050 ℃ of the arch crown of the gasification furnace and the reducing atmosphere, the oil sludge is subjected to thermal cracking and decomposed into reducing gases CO and H2 required by an Ou-metallurgy shaft furnace, and the gas enters the shaft furnace and then reduces iron ore in the shaft furnace into metallic iron, so that resource conversion and utilization of the oil sludge are realized; 4. part of the iron material contained in the oil sludge is reduced and melted in the gasification furnace to form qualified molten steel for the next process.

The technology for treating the oil sludge by using the Europe and metallurgy gasification furnace is tested in industrial operation in an eight-steel Europe and metallurgy furnace, 50 tons of oil sludge is treated daily, the ironmaking coke ratio is reduced by 20kg/t, the economic benefit is obvious, the safe and environment-friendly treatment of the oil sludge is realized, and the resource recycling target of the oil sludge is realized.

Detailed Description

An efficient and environment-friendly waste oil sludge disposal method comprises the following steps: 1. collecting dust removal ash, iron scale and sludge of a steel plant as base materials, adding 5% of waste oil, and preparing a mixture into oil sludge balls by using a special granulator, wherein the oil sludge balls comprise the following components in percentage by weight: 32% of sludge, 12% of coarse ash, 45% of iron scale, 5% of lime foam, 6% of a binding agent and 5% of grease; 2. adding the prepared oil sludge balls into a gasification furnace according to 2-5% of the total amount of raw materials fed into the furnace through a raw material conveying system of the Ou smelting furnace; 3. after the oil sludge pellets enter a gasification furnace, under the temperature of 1050 ℃ of the arch crown of the gasification furnace and the reducing atmosphere, the oil sludge is subjected to thermal cracking and decomposed into reducing gases CO and H2 required by an Ou-metallurgy shaft furnace, and the gas enters the shaft furnace and then reduces iron ore in the shaft furnace into metallic iron, so that resource conversion and utilization of the oil sludge are realized; 4. part of the iron material contained in the oil sludge is reduced and melted in the gasification furnace to form qualified molten steel for the next process.

Claims

1. An efficient and environment-friendly waste oil sludge disposal method is characterized by comprising the following steps: 1. collecting dust removal ash, iron scale and sludge of a steel plant as base materials, adding 5% of waste oil, and preparing a mixture into oil sludge balls by using a special granulator, wherein the oil sludge balls comprise the following components in percentage by weight: 32% of sludge, 12% of coarse ash, 45% of iron scale, 5% of lime foam, 6% of a binding agent and 5% of grease; 2. adding the prepared oil sludge balls into a gasification furnace according to 2-5% of the total amount of raw materials fed into the furnace through a raw material conveying system of the Ou smelting furnace; 3. after the oil sludge pellets enter a gasification furnace, under the temperature of 1050 ℃ of the arch crown of the gasification furnace and the reducing atmosphere, the oil sludge is subjected to thermal cracking and decomposed into reducing gases CO and H2 required by an Ou-metallurgy shaft furnace, and the gas enters the shaft furnace and then reduces iron ore in the shaft furnace into metallic iron, so that resource conversion and utilization of the oil sludge are realized; 4. part of the iron material contained in the oil sludge is reduced and melted in the gasification furnace to form qualified molten steel for the next process.