System and method for producing ecological cement through garbage fly ash and sludge cooperative mixed combustion in cement kiln

Abstract

The invention provides a system and method for producing ecological cement through garbage fly ash and sludge mixed combustion in a cement kiln. The system comprises a sludge pre-treatment unit, a garbage fly ash storage unit, a proportioned material storage unit, a material mixing system, a incinerating device, a clinker storage device and a cement kiln system, wherein the incinerating device issequentially provided with an air locking feeding machine, an upright incinerator, an air locking valve and a chain plate type discharging machine. The ecological cement is produced by adding cement kiln dust and pulverized coal in the sludge and the garbage fly ash for incineration, and meanwhile harmless and resourceful treatment of the sludge and the garbage fly ash is achieved. By means of thetreatment system and method provided by the invention, no waste gas, waste water or dust is discharged during treatment of the sludge and the garbage fly ash, and secondary pollution is avoided.

Description

technical field

[0001] The invention relates to the technical field of garbage fly ash treatment and sludge treatment, belongs to the harmless and resource-based disposal of solid waste, belongs to the field of environmental protection and the development of circular economy, and specifically relates to the ecological system of co-combusting garbage fly ash and sludge in cement kilns Systems and methods for cement. Background technique

[0002] Garbage fly ash is the dust and residue produced during the incineration process of domestic waste. Garbage fly ash has a high surface area and its main chemical elements are Si, Ca, Al, Fe, K, Na, Cl. Sludge is the sewage of water treatment plants. The residue produced by purification, the sludge contains siliceous raw materials, both of which are residues produced by urban environmental protection. However, both residues contain toxic and harmful substances such as organic matter, heavy metals and a large amount of chloride, especi...

Examples

Embodiment 1

[0063] Such as figure 1 As shown, the present invention provides a system for co-combusting garbage fly ash and sludge to make ecological cement in a cement kiln, including: sludge pretreatment unit, garbage fly ash storage unit, batching storage unit, material mixing system, incineration device , clinker storage device, cement kiln system, the sludge pretreatment unit, garbage fly ash storage unit and ingredient storage unit are respectively connected to the material mixing system through pipelines, and the material mixing system is connected to the incineration device. The incineration device is connected with the clinker storage device, and the incineration device is also provided with a pipeline to connect with the cement kiln system;

[0064] The incineration device comprises: an air-lock feeder 15, a vertical incinerator 10, a chain plate discharge machine 11, and a blower 12. The air-lock feeder 15 is connected to the vertical incinerator 10, and the vertical incinerato...

Embodiment 2

[0104] The difference between embodiment 2 and embodiment 1 is:

[0105] Present embodiment 2 provides a kind of method that cement kiln synergistically co-burns garbage fly ash and sludge to make ecological cement:

[0106] Preferably, the step (1) sludge pretreatment is carried out in a closed sludge pretreatment station, and the sludge pretreatment station is forced to exhaust air through a suction machine, and the air is sent to an incinerator for high-temperature oxidation and deodorization and then discharged In order to achieve the purpose of cost saving.

[0107] Preferably, the step (2) garbage fly ash is directly unloaded into the receiving pit by the automatic dump truck 201, and is lifted into the garbage fly ash storage by the hoist;

[0108] Preferably, the proportion of ecological cement raw materials in the step (4) is: 20% of sludge, 40% of garbage fly ash, 30% of cement kiln dust, and 10% of coal powder.

[0109] Preferably, step (5) granulation: the ecolog...

Embodiment 3

[0111] Preferably, the difference between embodiment 3 and embodiment 1 is that the proportion of ecological cement raw materials in the step (4) is: sludge 50%, garbage fly ash 32%, cement kiln dust 10%, coal powder 8%.

technical field

[0001] The invention relates to the technical field of garbage fly ash treatment and sludge treatment, belongs to the harmless and resource-based disposal of solid waste, belongs to the field of environmental protection and the development of circular economy, and specifically relates to the ecological system of co-combusting garbage fly ash and sludge in cement kilns Systems and methods for cement. Background technique

[0002] Garbage fly ash is the dust and residue produced during the incineration process of domestic waste. Garbage fly ash has a high surface area and its main chemical elements are Si, Ca, Al, Fe, K, Na, Cl. Sludge is the sewage of water treatment plants. The residue produced by purification, the sludge contains siliceous raw materials, both of which are residues produced by urban environmental protection. However, both residues contain toxic and harmful substances such as organic matter, heavy metals and a large amount of chloride, especi...

Examples

Embodiment 1

[0063] Such as figure 1 As shown, the present invention provides a system for co-combusting garbage fly ash and sludge to make ecological cement in a cement kiln, including: sludge pretreatment unit, garbage fly ash storage unit, batching storage unit, material mixing system, incineration device , clinker storage device, cement kiln system, the sludge pretreatment unit, garbage fly ash storage unit and ingredient storage unit are respectively connected to the material mixing system through pipelines, and the material mixing system is connected to the incineration device. The incineration device is connected with the clinker storage device, and the incineration device is also provided with a pipeline to connect with the cement kiln system;

[0064] The incineration device comprises: an air-lock feeder 15, a vertical incinerator 10, a chain plate discharge machine 11, and a blower 12. The air-lock feeder 15 is connected to the vertical incinerator 10, and the vertical incinerato...

Embodiment 2

[0104] The difference between embodiment 2 and embodiment 1 is:

[0105] Present embodiment 2 provides a kind of method that cement kiln synergistically co-burns garbage fly ash and sludge to make ecological cement:

[0106] Preferably, the step (1) sludge pretreatment is carried out in a closed sludge pretreatment station, and the sludge pretreatment station is forced to exhaust air through a suction machine, and the air is sent to an incinerator for high-temperature oxidation and deodorization and then discharged In order to achieve the purpose of cost saving.

[0107] Preferably, the step (2) garbage fly ash is directly unloaded into the receiving pit by the automatic dump truck 201, and is lifted into the garbage fly ash storage by the hoist;

[0108] Preferably, the proportion of ecological cement raw materials in the step (4) is: 20% of sludge, 40% of garbage fly ash, 30% of cement kiln dust, and 10% of coal powder.

[0109] Preferably, step (5) granulation: the ecolog...

Embodiment 3

[0111] Preferably, the difference between embodiment 3 and embodiment 1 is that the proportion of ecological cement raw materials in the step (4) is: sludge 50%, garbage fly ash 32%, cement kiln dust 10%, coal powder 8%.

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