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Stabilization method and kneader system for flyash cement

A kneader and stabilization technology, which is applied in the field of fly ash cement stabilization and kneader systems, can solve the problems of poor anti-corrosion and wear-resistant treatment of kneaders, insufficient automation of devices or equipment, and short service life of liners.

Active Publication Date: 2012-06-27
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The sealing effect of the kneader is poor and the noise is large;
[0007] 2. The kneader generally works intermittently, and the utilization rate of the equipment is only 30-50%;
[0008] 3. The anti-corrosion and wear-resistant treatment of the kneader is poor, and the service life of the liner is short;
[0009] 4. The degree of automation of the device or equipment is not high enough

Method used

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  • Stabilization method and kneader system for flyash cement
  • Stabilization method and kneader system for flyash cement
  • Stabilization method and kneader system for flyash cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154] A method for stabilizing fly ash cement, comprising the following steps:

[0155] 1) Storage and transportation of fly ash and cement;

[0156] 2) Preparation of chelating agent and batching of materials;

[0157] 3) kneading and maintenance;

[0158] It is characterized by:

[0159] 1) The fly ash produced by flue gas purification is transported to the fly ash bin through the bucket elevator, and the bulk cement tanker blows the bulk cement to the cement silo through compressed air;

[0160] 2) The fly ash stabilization workshop is equipped with a fly ash conveyor, a chelating agent storage tank, a chelating agent injection pump, a water tank and an industrial water pump. The fly ash, chelating agent, water and cement are weighed according to the following setting ratio and sent to the kneader ;

[0161] 3) The kneader is a horizontal double-shaft paddle type, and the kneader is forced to stir in the kneader. The stirring adopts the method of screw feeding or screw f...

Embodiment 2

[0165] The method for stabilizing fly ash cement as described above is characterized in that:

[0166] Except for "tap water, cement and chelating agent or inorganic agent, the addition amount thereof is respectively: 35%, 12% and 4% of the weight of dry fly ash in % by weight", the rest is the same as the method described in Example 1.

Embodiment 3

[0168] The method for stabilizing fly ash cement as described above is characterized in that:

[0169] Except for "tap water, cement and chelating agent or inorganic agent, the addition amount thereof is respectively: 30%, 10% and 3% of the weight of dry fly ash in % by weight", the rest is the same as the method described in Example 1.

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Abstract

The present invention relates to a method for stabilizing flying-ash cement and a kneader system, wherein the method comprises the following steps: storing and conveying flying-ash and cement; preparing of chelating agent and batching of material; kneading and maintaining. The invention is characterized in that the flying-ash, the cement, the chelating agent and the water enter the kneader. The kneader which is a horizontal double-shaft blade type stirs compulsively and adopts a spiral feeding mode for maintaining the mixed material and storing. The kneader system is characterized in that thekneader is the horizontal double-shaft blade type. The compulsive stirring is executed in the kneader. The stirring adopts the spiral feeding mode. The kneader adopts a closed design with low noise and little powder dust. The conveying of flying-ash and conveying of cement are executed in the closed device. The storing device and conveying device of material are respectively provided with a ventilation dust removing device. All devices of kneader system can operate automatically and continuously through the installed control board. A main operating signal is transmitted to a DCS system, namely a distributed control system.

Description

technical field [0001] The invention belongs to the field of environmental protection, and more specifically relates to a method for stabilizing fly ash cement and a kneader system. Background technique [0002] Fly ash produced after domestic waste incineration is treated as hazardous waste. Fly ash must be collected separately and is not allowed to be mixed with domestic waste, incineration residues, etc., or mixed with other hazardous waste. [0003] Fly ash produced after domestic waste incineration is not allowed to be stored for a long time at the place of generation, simple disposal is not allowed, and discharge is not allowed. The production site of domestic waste incineration fly ash must undergo necessary stabilization and stabilization treatment before it can be transported, and special transport vehicles must be used for transportation. [0004] At present, domestic and foreign studies on the stabilization of fly ash and other heavy metal-containing inorganic wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/33C04B28/00C04B18/08A62D101/43
CPCY02W30/91
Inventor 李朝晖刘海威刘超黎小保
Owner CHINA ENFI ENGINEERING CORPORATION
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