阅读说明：本技术 一种烧结机协同处置危废hw18的新工艺方法 (Novel process method for co-processing hazardous waste hw18 by sintering machine ) 是由 曾其雄 徐建根 曾成勇 罗文� 周浩亨 鄢永普 余梦超 张正冰 王莉萍 于 2021-08-23 设计创作，主要内容包括：本发明公开了一种烧结机协同处置危废hw18的新工艺方法,首先,利用汽车封闭运输焚烧残渣hw18至本项目场地,使用电动单梁吊将袋装焚烧残渣hw18运至不锈钢料仓上部,通过料仓上部破罐器或破袋器,物料进入料仓,装完物料后顶部封盖封闭。料仓中的焚烧残渣hw18从料仓底部进入拉式皮带秤,按比例配入烧结混合料中,经过混合,进入烧结混合料仓,再进入烧结机烧结,最后烧结成烧结矿成品。本发明的烧结机协同处置危废hw18的新工艺方法,无需新设备的投入,且无需改变原有的烧结机工艺,具有处置彻底,处置成本低,工艺和操作简单的优点。(The invention discloses a novel process method for cooperatively treating hazardous waste hw18 by a sintering machine, which comprises the steps of firstly, utilizing an automobile to transport incineration residue hw18 to a project site in a closed mode, using an electric single-beam crane to transport bagged incineration residue hw18 to the upper part of a stainless steel bin, enabling materials to enter the bin through a bin upper part can breaker or a bag breaker, and sealing the top of the bin through a top cover after the materials are loaded. The incineration residue hw18 in the bin enters a pull-type belt scale from the bottom of the bin, is proportionally mixed into a sintering mixture, enters a sintering mixture bin after mixing, enters a sintering machine for sintering, and is finally sintered into a sintered ore finished product. The new process method for the sintering machine to cooperatively treat the hazardous waste hw18 does not need to input new equipment and change the process of the original sintering machine, and has the advantages of thorough treatment, low treatment cost and simple process and operation.)

1. A new process method for the collaborative disposal of hazardous waste hw18 by a sintering machine is characterized in that: the method comprises the following steps:

(1) and (3) transportation: sealing and transporting the incineration residue hw18 to a sealed storage bin;

(2) mixing in proportion: transporting the incineration residue hw18 in the closed bunker to a mixing chamber, mixing the incineration residue hw18 with a sintering raw material to obtain a sintering mixture, and draining the sintering mixture, wherein the content of the incineration residue hw18 is lower than 5% of the sintering raw material;

(3) and (3) sintering: and conveying the sintering mixture to a sintering furnace for sintering to obtain a finished sintered ore product.

2. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 1, characterized in that: the content of the incineration residue hw18 is 0.2 percent of the sintering mixture.

3. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 1, characterized in that: the transportation comprises the following steps:

(1.1) closed transportation: the bagged incineration residues hw18 are transported to a designated site in a closed manner through an automobile;

(1.2) transferring: conveying the bagged incineration residues hw18 to the upper part of a storage bin through an electric single-beam crane;

(1.3) centralized collection: and pouring the incineration residue hw18 into a bin through a tank breaker or a bag breaker on the upper part of the bin, and sealing the top of the bin for treatment.

4. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 3, characterized in that: the mixing comprises the following steps:

(2.1) weighing: conveying the incineration residue hw18 in the bin to a weighing place for weighing;

(2.2) mixing: and the weighed incineration residue hw18 enters a mixing chamber to be mixed with the sintering raw material.

5. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 3, characterized in that: the step (1.1) further comprises the following steps:

(1.11) rinsing: and after the incineration residues hw18 are transported to a designated site in a closed manner, the site where the incineration residues hw18 are stacked is washed, and sewage enters a sewage collection system.

6. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 3, characterized in that: and the sewage in the sewage collection system is precipitated and then enters the mixing chamber to be mixed with the sintering raw material and the incineration residue hw 18.

7. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 1, characterized in that: the processing temperature of the sinter mix was 1350 ℃.

8. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 1, characterized in that: the temperature of the finished sintered ore is lower than 120 ℃, the particle diameter is 5-150mm, and the alkalinity is 1.8.

9. The new process method for the co-processing of the hazardous waste hw18 by the sintering machine according to claim 4, characterized in that: and (3) weighing by using a pull-type belt scale in the step (2.1).

Technical Field

The invention relates to the field of chemical production, in particular to a novel process method for cooperatively treating hazardous waste hw18 by a sintering machine.

Background

The hazardous waste such as the Hw18 incineration disposal residue (772-.

Introduction of the prior disposal technology:

resource utilization: and (3) recycling valuable heavy metals in the incineration residue, such as acid extraction, alkali extraction, complexing agent extraction, biological extraction and the like. Typical process-sulfuric acid dissolution, filter pressing to remove mud, and oxidation reaction of filtrate to remove iron; after iron removal, the filtrate is heated, reduced and filter-pressed to extract chromium hydroxide, and the chromium slag is converted into chromium production workshop to produce basic chromium sulfate; extracting copper, zinc and nickel solution from the filtrate by an organic phase; and adding sulfuric acid to back extract pure nickel sulfate, zinc and copper, and crystallizing to obtain the product. The advantages are that: the treatment is thorough; the disadvantages are as follows: professional enterprises need to be built, the process is complex, the flow is long, and the equipment investment is huge; the requirement on useful elements is high, the proportion of the useful elements is low, and the economic benefit is poor; the disposal cost is high, and the economic benefit is unstable; the treatment of resource is less dangerous and waste, and the production efficiency of enterprises is unstable.

And (3) cement kiln co-treatment: the incineration residue is homogenized and pretreated, and enters a cement kiln for cooperative treatment according to a certain proportion. The advantages are that: the equipment investment is low and the disposal quantity is large. The disadvantages are as follows: the existing synergistic treatment amount is large, the influence on the cement kiln capacity is large, the comprehensive benefit of a cement enterprise is not favorably obtained, the benefit driving force is reduced, the existing basic saturation is realized, and the growth amount is not large; in addition, the requirement on the content of heavy metals is strict, and the proportion is strictly controlled; finally, heavy metals enter a concrete building to be diluted and cured, and can be leached into water and soil after a long time, so that the environment is influenced.

Curing and landfill disposal: and the incineration residue is solidified and then enters a special landfill for landfill. The advantages are that: all varieties hw18 sludge can be landfilled for curing. The disadvantages are as follows: the curing and landfill costs are high; a professional rigid landfill is needed, and the treatment in a common landfill cannot be realized; the sludge is actually kept, and the risk of environmental pollution caused by leaching after a long time is not eliminated; the professional rigid landfill site is few, the large amount of hw18 incineration residue is not filled in the landfill in a large capacity, and the disposal cost is high.

Carrying out vitrification treatment in a plasma furnace: and (4) entering a plasma furnace, and adding other ingredients at high temperature to form glass body solidification. The advantages are that: the curing is complete, and the variety of hw18 can be treated. The disadvantages are as follows: professional equipment needs to be invested, and the investment is huge; the plasma furnace has low power and low handling capacity; the disposal cost is high.

Other treatment processes comprise: the incineration residue is proportioned according to a certain proportion, and the final product is a vitrified foam heat-insulating product by utilizing the existing thermal kiln. The advantages are that: the solidification is complete, and the incineration residue hw18 can be treated. The disadvantages are as follows: professional equipment needs to be invested, and the investment is huge; the process is complex, and the disposal quantity is small; the disposal cost is high; the product yield is low, the output value is low, and the economic benefit of enterprises is poor.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel process method for cooperatively treating dangerous waste hw18 by a sintering machine aiming at the defects of the prior art.

The invention realizes the purpose through the following technical scheme: a new process method for the collaborative disposal of hazardous waste hw18 by a sintering machine is disclosed, wherein: the method comprises the following steps:

(1) and (3) transportation: sealing and transporting the incineration residue hw18 to a sealed storage bin;

(2) mixing in proportion: transporting the incineration residue hw18 in the closed bunker to a mixing chamber, mixing the incineration residue hw18 with a sintering raw material to obtain a sintering mixture, and draining the sintering mixture, wherein the content of the incineration residue hw18 is lower than 5% of the sintering raw material;

(3) and (3) sintering: and conveying the sintering mixture to a sintering furnace for sintering to obtain a finished sintered ore product.

The incineration residue hw18 is mixed with the sintering raw material for sintering, so that the incineration residue hw18 is completely utilized without changing the original process of the sintering machine.

As a further optimization scheme of the invention, the content of the incineration residue hw18 is lower than 0.22% of the sintering mixture.

As a further optimization of the invention, the transportation comprises the following steps:

(1.1) closed transportation: the bagged incineration residues hw18 are transported to a designated site in a closed manner through an automobile;

(1.2) transferring: conveying the bagged incineration residues hw18 to the upper part of a storage bin through an electric single-beam crane;

(1.3) centralized collection: and pouring the incineration residue hw18 into a bin through a tank breaker or a bag breaker on the upper part of the bin, and sealing the top of the bin for treatment.

As a further optimization of the present invention, the mixing comprises the following steps:

(2.1) weighing: conveying the incineration residue hw18 in the bin to a weighing place for weighing;

(2.2) mixing: and the weighed incineration residue hw18 enters a mixing chamber to be mixed with the sintering raw material.

As a further optimization scheme of the present invention, the step (1.1) further comprises the following steps:

(1.11) rinsing: and after the incineration residues hw18 are transported to a designated site in a closed manner, the incineration residues hw18 are washed, and sewage enters a sewage collection system. A

Because the incineration residue hw18 contains water, a flushing sewage collection system is arranged, field flushing water enters a sewage collection tank, the field flushing water and the water or the substances sprayed out due to flushing or hoisting and the like are precipitated together, clear water after precipitation enters a mixing chamber to be used as production water, and sludge in the precipitation tank directly enters a pull-type belt weigher to be weighed and recovered.

According to a further optimization scheme, sewage in the sewage collection system enters the mixing chamber after being precipitated to be mixed with the sintering raw material and the incineration residue hw 18.

As a further optimization scheme of the invention, the processing temperature of the sintering mixture is 1350 ℃.

As a further optimization scheme of the invention, the temperature of the finished sintered ore is lower than 120 ℃, the particle diameter is 5-150mm, and the alkalinity is 1.8.

Further optimizing the scheme, and selecting a pull-type belt scale for weighing in the step (2.1).

Compared with the prior art, the invention has the following beneficial effects:

the hw18 incineration residue mainly contains inorganic compounds such as SiO2, AL2O3, CaO, FeO and the like and a small amount of heavy metals, is basically consistent with sintering raw materials for iron making and slagging in sintering machine production, meets the basic requirements of the sintering machine on the sintering raw materials for iron making and slagging, can be added into the sintering machine raw materials according to a certain proportion, and meets the requirements of raw material sintering and slagging. And the existing equipment of the existing iron and steel enterprises is utilized, the equipment investment is basically not needed, the treatment process technology and the operation requirement are simple, the energy is fully utilized, and the hw18 is disposed in place. The iron element enters the sinter and is recycled; the heavy metal is solidified in the sinter and finally enters a blast furnace; the tail gas enters the existing environmental treatment equipment. The characteristic of large material usage amount of the iron and steel enterprises is fully exerted, the disposal amount is large, the disposal time is along with the existing iron-making sintering machine process, the existing process of the iron and steel enterprises is not changed, and the disposal time is short.

By arranging the sewage collecting system, the wastewater is ensured not to be discharged outside, and the recycling of the sewage is realized,

drawings

FIG. 1 is a schematic flow chart of a new process for co-processing hazardous waste hw18 by a sintering machine according to the invention;

FIG. 2 is a schematic diagram of the transportation step in the new process for co-processing hazardous waste hw18 by a sintering machine according to the invention;

FIG. 3 is a schematic flow chart of the mixing steps in the new process for co-processing hazardous waste hw18 by the sintering machine.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Examples

The new process method for the sintering machine to cooperatively treat the hazardous waste hw18 comprises the steps of raw material or fuel transportation, batching, mixing, sintering, cooling, screening, finished product output and the like. Firstly, the incineration residue hw18 is transported to the project site by an automobile in a closed manner, and the bagged incineration residue hw18 is transported to a newly-built 50m site by an electric single-beam crane³And the material enters the stock bin through a tank breaking device or a bag breaking device on the upper part of the stock bin, and the top of the stock bin is sealed by a sealing cover after the material is filled. Then, the hw18 in the bin enters a weighing system from the bottom, is proportionally mixed into the sintering mixture, enters a sintering mixture bin after mixing, enters a sintering machine for sintering, and is finally sintered into a sintered ore finished product. The process method can fully utilize the hw18 resource, utilizes the original sintering machine, basically does not need equipment investment, does not change the original process of the sintering machine, has simple process and operation and high economic cost, has higher treatment temperature, complete vitrification of inorganic oxides, complete decomposition of organic matters and complete combustion compared with other treatment enterprises through the treatment of the sintering machine, and can meet the first-level (excellent) requirement of the technical standard item of the high-quality iron sinter of the YB/T421-2014 industrial standard of the iron sinter.

As shown in fig. 1, the new process method for the sintering machine to cooperatively dispose the hazardous waste hw18 specifically comprises the following steps:

(1) and (3) transportation: and (3) hermetically transporting the incineration residues hw18 to a closed bunker, wherein the method specifically comprises the following steps, as shown in figure 2.

(1.1) closed transportation: and (4) sealing and transporting the bagged incineration residues hw18 to a designated site by an automobile.

(1.11) rinsing: and after the incineration residues hw18 are transported to a designated site in a closed manner, the site where the incineration residues hw18 are stacked is washed, and sewage enters a sewage collection system.

(1.2) transferring: and conveying the bagged incineration residues hw18 to the upper part of a storage bin through an electric single-beam crane.

(1.3) centralized collection: and pouring the incineration residue hw18 into a bin through a tank breaker or a bag breaker on the upper part of the bin, and sealing the top of the bin for treatment.

(2) Mixing in proportion: and (2) transporting the incineration residues hw18 in the closed bunker to a mixing chamber, mixing the incineration residues hw18 with a sintering raw material to obtain a sintering mixture, and draining the sintering mixture, wherein the content of the incineration residues hw18 is lower than 5% of the sintering raw material. The method specifically comprises the following steps as shown in fig. 3.

In this embodiment, the content of the incineration residue hw18 is 0.2% of the sinter mix.

(2.1) weighing: conveying the incineration residue hw18 in the bin to a weighing place for weighing;

(2.2) mixing: and the weighed incineration residue hw18 enters a mixing chamber to be mixed with the sintering raw material.

(3) And (3) sintering: and conveying the sintering mixture to a sintering furnace for sintering to obtain a finished sintered ore product. The treatment temperature in the sintering furnace is 1350 ℃, the temperature of the sintered ore finished product is lower than 120 ℃, the particle diameter is 5-150mm, and the alkalinity is 1.8.

And (3) in the step (1.11), precipitating the sewage in the sedimentation tank, then feeding the precipitated sewage into the mixing chamber through a self-priming pump to be used as the process water, and directly feeding the sludge in the sedimentation tank into a pull-type belt scale to be weighed and recovered.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.