CN218743866U

CN218743866U - Fly ash recycling device of waste incineration power generation system

Info

Publication number: CN218743866U
Application number: CN202223204026.7U
Authority: CN
Inventors: 井增航
Original assignee: Ningxia Zhongke Guotong New Energy Co ltd
Current assignee: Ningxia Zhongke Guotong New Energy Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-03-28
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a waste incineration power generation system flying dust cyclic utilization device, including bucket elevator, utilize bucket elevator to collect the flying dust in the flying dust storehouse, utilize the shale shaker fan of installing additional in the flying dust storehouse to sieve the flying dust, fine ash after the screening machine screening, mix in slaked lime preparation jar according to a certain amount, improve the alkali content of preparing the thick liquid in the preparation jar, the lime thick liquid of preparing in the slaked lime preparation jar is carried to rotary atomizer through slaked lime thick liquid pump, utilize the atomizer to atomize the thick liquid of preparing and spout in the reaction tower, carry out flue gas desulfurization, make the alkaline material make full use of in the flying dust, sulfur dioxide's emission is reduced, reduce the use amount of slaked lime simultaneously, can practice thrift a large amount of slaked lime, practice thrift the operation cost, through the flying dust utilization technique, collect the storehouse bottom with the flying dust that the particle diameter is great, fly dust solidifies, reduce the flying dust production volume of solidification, be favorable to environmental protection and can practice thrift the treatment manufacturing cost.

Description

Fly ash recycling device of waste incineration power generation system

Technical Field

The utility model relates to a refuse treatment technical field especially relates to a fly ash cyclic utilization device of waste incineration power generation system.

Background

At present, a waste incineration plant generates electricity by incinerating waste in daily life mainly through a waste incineration power generation system, the problem of waste accumulation is solved, waste reutilization is realized at the same time, smoke generated in the waste incineration power generation process needs to be treated through a smoke purification treatment system, organized emission is carried out after reaching the standard, slaked lime is generally used as a reaction purification material of acid gas in the smoke purification process, slaked lime and other dust and the like after purifying the acid gas in the smoke are filtered through cloth bag dust removal, the smoke is discharged after reaching the standard, the incompletely reacted slaked lime such as the dust and the like, and the dust and other substances are filtered through a cloth bag dust removal device to form fly ash.

The waste incineration fly ash is used as hazardous waste, the fly ash is improperly disposed, can pollute underground water, pollute the environment and endanger the risks of human health, solidification treatment must be carried out according to the hazardous waste, underground anti-leakage work is well carried out before landfill, a large amount of fly ash is inevitably threatened seriously to soil and underground water, and the treatment cost is high; in addition, the fly ash contains a large amount of unreacted slaked lime, and a large amount of alkaline substances such as magnesium oxide, calcium oxide and the like are not completely utilized.

In the existing waste incineration flue gas treatment process, a large amount of used slaked lime has the following defects: firstly, the consumption of lime slaking in the process of flue gas purification treatment after waste incineration is large and difficult to solve; secondly, a large amount of slaked lime is not fully utilized in the flue gas purification process after the waste incineration, the amount of fly ash generated by the waste incineration is increased, the generated large amount of fly ash cannot be utilized, the flue gas purification cost is increased, and the environment is seriously influenced by improper treatment of the large amount of fly ash.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a fly ash recycling device of a waste incineration power generation system.

The utility model discloses a concrete technical scheme as follows: a fly ash recycling device of a waste incineration power generation system comprises a bucket elevator and a fly ash bin connected with a discharge port of the bucket elevator, wherein the bucket elevator lifts fly ash to the fly ash bin; the vibrating screen machine is arranged in the fly ash bin and connected with a discharge port of the bucket elevator, the fly ash is screened by the vibrating screen machine, and fine ash screened by the screen machine falls into a fine ash collecting hopper arranged below the vibrating screen machine in the fly ash bin; the fine ash collecting hopper bottom hopper lug connection screw conveyer, screw conveyer carries fine flying ash to fine flying ash storehouse, fine flying ash storehouse bottom is hourglass hopper-shaped, hopper sub-unit connection feed screw conveyer, feed screw conveyer carries fine flying ash to slaked lime preparation jar, and the flying ash is mixed according to a certain amount and is joined in marriage in slaked lime preparation jar, the lime thick liquid of preparing in the slaked lime preparation jar is sent into the desulfurization reaction tower through the slaked lime pump, carries out flue gas desulfurization.

Furthermore, the vibration screening machine is arranged in a downward inclined mode, and large-particle fly ash after screening flows to the bottom of the fly ash bin through the guide chute.

Furthermore, the fly ash bin is of a closed structure, so that fly ash is prevented from flying up during the movement of the vibrating screen machine.

Furthermore, the bottom of the fly ash bin is of a funnel type and is provided with a gate valve, so that materials can be discharged conveniently.

Furthermore, an electric gate valve is arranged on a discharge port of a funnel at the bottom of the fine fly ash bin, the outflow quantity of the fine fly ash is controlled, and the fine fly ash is mixed in the slaked lime preparation tank according to a certain quantity.

Furthermore, a stirring device is arranged in the slaked lime preparation tank, and the slaked lime slurry is prepared by fully mixing and stirring.

The technical effects of the utility model reside in that: fly ash generated by a waste incineration flue gas treatment system contains a large amount of incompletely-reacted slaked lime and a large amount of alkaline substances such as magnesium oxide, calcium oxide and the like in the fly ash; fly ash with proper fineness is mixed with slaked lime to prepare slurry through screening, and the lime slurry is prepared, so that alkaline substances in the fly ash are fully utilized, and a large amount of slaked lime is saved; the fly ash with larger grain size falls into the bottom of the fly ash bin for fly ash solidification, thereby reducing the generation amount of the solidified fly ash and being beneficial to environmental protection.

Drawings

FIG. 1 is a schematic view of a fly ash recycling device of a waste incineration power generation system of the present invention;

in the figure, 1, a bucket elevator, 2, an ash bin, 3, a vibrating screen classifier, 4, a fine ash collecting hopper, 5, a screw conveyor, 6, a fine ash bin, 7, a feeding screw conveyor, 8, a slaked lime preparation tank, 9, a slaked lime pump, 10, an electric gate valve, 11, a stirring device and 12, gate valves are arranged.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the specific diagram 1.

Referring to fig. 1, the utility model provides a fly ash recycling device of a waste incineration power generation system, including bucket elevator 1, fly ash of bucket elevator 1 is promoted and is sent to fly ash bin 2, fly ash bin 2 is airtight storehouse body, and the bottom is funnel formula, installs the gate valve 12 of control ejection of compact at the export; the ash bin 2 is internally provided with a vibration screening machine 3 which is slightly inclined downwards, the vibration screening machine 3 can purchase finished products from the market, the vibration screening machine 3 continuously vibrates to leave particles larger than screen holes on the screen surface, and the particles smaller than the screen holes fall into a fine ash collecting funnel 4 arranged below the vibration screening machine 3 through the screen holes, so that coarse and fine particle separation is finally realized; large-particle materials on the vibrating sieving machine 3 fall into the bottom of the fly ash bin 2 under the action of gravity because the sieve is arranged in a downward inclination way, and the bottom of the fly ash bin 2 is in a funnel type, so that when too many materials are in the bin, the materials can be discharged through a gate valve 12 arranged at the bottom; the fine fly ash collecting hopper 4 is characterized in that the hopper at the bottom of the fine fly ash collecting hopper 4 is connected with a screw conveyor 5, fine fly ash is directly conveyed into the screw conveyor 5, the screw conveyor 5 conveys the fine fly ash into a fine fly ash bin 6, the bottom of the fine fly ash bin 6 is funnel-shaped, an electric gate valve 10 is arranged on a discharge port of the hopper, the ash discharge amount is controlled, the lower part of the hopper is directly connected with a feeding screw conveyor 7, the fine fly ash is conveyed into a slaked lime preparation tank 8 by the feeding screw conveyor 7, fly ash is mixed and matched in the slaked lime preparation tank according to a certain amount, a stirring device 11 is arranged in the slaked lime preparation tank, slaked lime slurry is prepared by fully mixing and stirring, the prepared lime slurry is conveyed into a desulfurization reaction tower through a slaked lime pump 9, and flue gas desulfurization is carried out.

The working principle is as follows: the fly ash is lifted to an inlet of a fly ash bin by a lifter, the fly ash is poured into a vibrating screen classifier arranged in the fly ash bin from the inlet of the fly ash bin, the fly ash with larger particle size is screened by the vibrating screen classifier, the fly ash enters a coarse ash chute from the screen classifier, falls into the bottom of the fly ash bin, fine ash screened by the screen classifier enters a fine ash collecting funnel, the fine fly ash is conveyed to a fine fly ash bin arranged at the top of a slaked lime preparation tank by a screw conveyor, a switch is controlled by a gate valve, a feeding screw conveyor is mixed in the slaked lime preparation tank according to a certain amount, the fly ash passes through an original slaked lime preparation tank, is stirred to prepare slurry, and is sent into a desulfurization reaction tower by an original slaked lime pump to carry out flue gas desulfurization.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The utility model provides a waste incineration power generation system flying dust cyclic utilization device which characterized in that includes:

the fly ash device comprises a bucket elevator (1) and a fly ash bin (2) connected with a discharge port of the bucket elevator (1), wherein the fly ash bin (2) is lifted and conveyed by the bucket elevator (1);

the vibrating screen classifier (3) is arranged in the fly ash bin (2) and is connected with a discharge port of the bucket elevator (1);

a fine ash collecting funnel (4) arranged below the vibrating screening machine (3) in the fly ash bin (2);

a screw conveyor (5) directly connected with the bottom hopper of the fine ash collecting hopper (4);

the fine fly ash bin (6) is connected with a discharge hole of the screw conveyor (5), the screw conveyor (5) conveys the fine fly ash to the fine fly ash bin (6), and the bottom of the fine fly ash bin (6) is funnel-shaped;

the fine fly ash desulfurization device comprises a feeding screw conveyor (7) arranged at the lower part of a hopper at the bottom of a fine fly ash bin (6), a slaked lime preparation tank (8) arranged at the discharge port of the feeding screw conveyor (7), and a slaked lime pump (9) arranged between the slaked lime preparation tank (8) and a desulfurization reaction tower, wherein the feeding screw conveyor (7) conveys fine fly ash to the slaked lime preparation tank (8), and the slaked lime pump (9) conveys lime slurry prepared in the slaked lime preparation tank (8) to the desulfurization reaction tower.

2. The fly ash recycling device of the waste incineration power generation system according to claim 1, wherein the vibrating screen machine (3) is arranged in a downward inclination manner.

3. The fly ash recycling device of a waste incineration power generation system according to claim 1, wherein the fly ash bin (2) is a closed structure.

4. The fly ash recycling device of the waste incineration power generation system according to claim 1, wherein the bottom of the fly ash bin (2) is funnel-shaped and is provided with a gate valve (12).

5. The fly ash recycling device of the waste incineration power generation system according to claim 1, wherein an electric gate valve (10) is arranged on a discharge port of a hopper at the bottom of the fine fly ash bin (6).

6. The fly ash recycling device of a waste incineration power generation system according to claim 1, wherein a stirring device (11) is arranged in the slaked lime preparation tank (8).