Method for cooperatively treating powder and sludge waste by using cement kiln

A technology for co-processing and waste, applied in the field of waste treatment, can solve the problem of not being able to effectively apply PTA sludge and cracking catalyst powder waste, and achieve the goal of ensuring incineration temperature, ensuring stability, and preventing secondary pollution. Effect

Active Publication Date: 2019-11-05
王天陆
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cement kiln incineration disposal technology only involves traditional waste sludge and domestic municipal waste PTA sludge, and cannot be effectively applied to the effective systematic treatment of PTA sludge and cracking catalyst powder waste. Therefore, , it is necessary to study a method that can effectively co-process powder and sludge wastes by using cement kilns

Method used

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  • Method for cooperatively treating powder and sludge waste by using cement kiln
  • Method for cooperatively treating powder and sludge waste by using cement kiln
  • Method for cooperatively treating powder and sludge waste by using cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1-a kind of method utilizing cement kiln cooperative processing powder class and sludge class waste, comprises the steps:

[0041](1) Pre-treatment of sludge waste

[0042] After the PTA sludge waste with a moisture content of 55% is crushed, the combustion-supporting mixture is added to stir and mix at 30°C to obtain the PTA sludge mixed waste, which is homogenized and stored, and the PTA sludge waste is disposed of The scale is 70t / d; the combustion-supporting mixture is formed by mixing rice husk ash and rice bran powder at a mass ratio of 1:1:3;

[0043] (2) Pre-treatment of powder waste

[0044] The spent catalyst powder waste with a moisture content of 5% is magnetically separated by a magnetic separation device to obtain two sets of spent catalyst powder waste with different metal content and magnetic properties, which are homogenized separately Storage, waste catalyst powder waste disposal scale is 40t / d; the Cl of spent catalyst powder waste with l...

Embodiment 2

[0049] Embodiment 2-a kind of method utilizing cement kiln cooperative processing powder class and sludge class waste, comprises the steps:

[0050] A. Pre-treatment of sludge waste

[0051] (1) After the PTA sludge waste with a moisture content of 65% is crushed by a crusher until the particle size is <3 mm, the combustion-supporting mixture is added to stir and mix at 38 ° C. The addition of the combustion-supporting mixture is PTA sludge. 5% of the mud waste quality, stir evenly to obtain PTA sludge mixed waste; the disposal scale of PTA sludge waste is 60t / d; 1:5:5 mixed;

[0052] (2) Transport the PTA sludge mixed waste in step (1) to the sludge receiving storage tank via a sealed transport vehicle, and homogenize and store it;

[0053] (3) The PTA sludge mixed waste is transported to the sludge spray gun by the thick slurry pump at the bottom of the sludge receiving storage tank, and sprayed into the kiln tail smoke chamber of the rotary cement kiln by the sludge spray...

Embodiment 3

[0064] Embodiment 3-a kind of method utilizing cement kiln cooperative processing powder class and sludge class waste, comprises the steps:

[0065] A. Pre-treatment of sludge waste

[0066] (1) After the PTA sludge waste with a moisture content of 60% is crushed by a crusher until the particle size is <3 mm, the combustion-supporting mixture is added to stir and mix at 35 ° C. The addition of the combustion-supporting mixture is PTA sludge. 10% of the mud waste quality, stir evenly, obtain PTA sludge mixed waste; PTA sludge waste disposal scale is 50t / d; The combustion-supporting mixture is made of rice husk ash and rice bran powder with a mass ratio 1:1:5 mixed;

[0067] (2) Transport the PTA sludge mixed waste in step (1) to the sludge receiving storage tank via a sealed transport vehicle, and homogenize and store it;

[0068] (3) The PTA sludge mixed waste is transported to the sludge spray gun by the thick slurry pump at the bottom of the sludge receiving storage tank, ...

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Abstract

The invention provides a method for cooperatively treating powder and sludge waste by using a cement kiln. The method comprises the following steps that (1) PTA sludge waste with the water content of55%-65% is pre-treated to obtain PTA sludge mixed waste, wherein the treatment scale is 50-70t / d; (2) waste catalyst powder waste with the water content less than or equal to 5% is pre-treated to obtain two groups of waste catalyst powder waste, wherein the treatment scale is 20-40t / d; (3) the PTA sludge mixed waste and high-metal-content and high-magnetic waste catalyst powder waste are fed intoa feed-end chamber to be incinerated, and then the low-metal-content and low-magnetic waste catalyst powder waste is added into the feed-end chamber to be incinerated; and (4) flue gas generated by incineration is introduced into a kiln tail system, and slag generated by incineration and fly ash generated by incineration waste gas are introduced into a rotary kiln for preparing cement clinker. Themethod can be used for simultaneously treating the PTA sludge waste and waste catalyst powder waste cooperatively to achieve the harmless, minimization, recycling and stabilization treatment on the combustible industrial waste.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to a method for co-processing powder and sludge wastes by using a cement kiln. Background technique [0002] At present, there are many kinds of waste disposal methods at home and abroad. The traditional waste landfill abroad is gradually restricted and eliminated, and the domestic direct landfill method is also gradually marginalized. Improper use of landfill landfills will produce heavy metals and their compound pollution, leading to soil pollution, which will enter the human body through the food chain, which will affect human health, and there will be potential secondary pollution to soil depletion and heavy metal pollution hazards; potential secondary pollution to groundwater secondary pollution. Therefore, the use of waste cement kiln incineration disposal technology has become a research hotspot, and it is a technology with better waste treatment effect at this stage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/20F23G5/44F23G5/033F23G5/02
CPCF23G5/20F23G5/44F23G5/033F23G5/02Y02P40/10
Inventor 王天陆
Owner 王天陆
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