CN212430841U

CN212430841U - Carbon-containing fly ash recycling system based on electric bag dust remover

Info

Publication number: CN212430841U
Application number: CN202021546888.6U
Authority: CN
Inventors: 王清雨; 林爱武; 王运来; 张颖; 朱丽萍
Original assignee: Henan Jinkai Chemical Investment Holding Group Co ltd
Current assignee: Henan Jinkai Chemical Investment Holding Group Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-01-29
Anticipated expiration: 2030-07-30

Abstract

The application provides a system is recycled to carbonaceous flying dust based on electricity bag dust remover, including firing burning furnace, the outside outstanding detention portion that forms in circumference is followed on the upper portion that fires burning furnace, all establish a plurality of backward flows mouthful in the detention portion, backward flow mouth and loop configuration's honeycomb duct intercommunication, the gas outlet that fires burning furnace is connected with electrostatic precipitator, electrostatic precipitator's storage hopper pass through the material seal pump with honeycomb duct connection. The fly ash containing carbon in the storage hopper is conveyed to the flow guide pipe by the material sealing pump and enters the retention part from the return port, and under the combined action of the downward wind power of the retention part and the upward vertical wind power at the bottom of the combustion furnace, an annular flow area is formed in the retention part, so that the fly ash can be sufficiently combusted in the combustion furnace, and the problem that the fly ash of the existing combustion furnace contains high carbon is effectively solved.

Description

Carbon-containing fly ash recycling system based on electric bag dust remover

Technical Field

The application relates to the technical field of circulating fluidized bed boilers, in particular to a carbon-containing fly ash recycling system based on an electric bag dust remover.

Background

The circulating fluidized bed boiler is a clean coal combustion technology with high industrialization degree, the existing boiler has the problem of high fly ash carbon residue, and the high fly ash carbon residue of the circulating fluidized bed boiler can cause the following problems:

(1) the fly ash has high carbon content, the fuel coal can not be fully combusted, the heat economy of the circulating fluidized bed boiler is reduced, and the coal consumption per ton of steam is increased;

(2) the fly ash has high carbon content, the yield of the boiler coal ash is increased invisibly, the residual carbon content of the boiler coal ash is high, and the coal ash is difficult to be recycled;

(3) the increase of the amount of the discharged ash increases the smoke enthalpy of the tail gas, the heat loss of the boiler is increased, and the overall heat efficiency loss is large;

(4) higher ash temperature affects the safe operation of the subsequent bag type dust collector, so that fire holes of the filter bag are easily caused, and the service life of the filter bag is shortened.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a system is recycled to carbonaceous flying dust based on electricity bag dust remover, including firing burning furnace, the upper portion that fires burning furnace is along the outside outstanding detention portion that forms of circumference, all establish a plurality of backward flows mouths on the detention portion, backward flow mouth and loop configuration's honeycomb duct intercommunication, the gas outlet that fires burning furnace is connected with electrostatic precipitator, electrostatic precipitator's storage hopper pass through the material pump that seals with honeycomb duct connection.

Optionally, the retention section has a trapezoidal structure in cross section.

Optionally, all establish a plurality of discharging pipes on the honeycomb duct, the discharging pipe with backward flow mouth intercommunication.

Optionally, a material returning pipe is arranged between the feed inlet of the flow guide pipe and the storage hopper, and the material sealing pump is arranged on the material returning pipe.

Optionally, the guide pipe is sleeved outside the combustion furnace, and the guide pipe is located above the retention part.

Optionally, the output end of the electric dust removal device is connected with a cloth bag dust removal device.

Optionally, the combustion furnace further comprises a filling opening positioned on the side part and a slag discharge opening positioned on the bottom part.

Optionally, the inner diameter of the narrower end of the retention section is equal to the inner diameter of the burner.

According to the carbon-containing fly ash recycling system based on the electric bag dust collector, carbon-containing fly ash in the storage hopper is conveyed to the flow guide pipe by the material sealing pump and enters the retention part from the return port, and under the combined action of the downward wind power of the retention part and the upward wind power of the bottom of the combustion furnace, an annular flow area is formed in the retention part, so that the fly ash is fully combusted in the combustion furnace, and the problem that the fly ash of the existing combustion furnace has high carbon content is effectively solved.

Drawings

FIG. 1 is a schematic view of one embodiment of the present application;

FIG. 2 is a schematic view of the furnace of FIG. 1;

FIG. 3 is a schematic view of the retention section of FIG. 1;

fig. 4 is a schematic view of the draft tube of fig. 1.

Detailed Description

In accordance with the concepts of the present application, embodiments of an electrostatic precipitator based carbonaceous fly ash recycling system are provided herein in conjunction with the accompanying drawings. Referring to fig. 1 to 4, the system for recycling fly ash containing carbon comprises a combustion furnace 1, an electric dust collector 9 and a cloth bag dust collector 10, wherein the electric dust collector 9 is used for enriching the carbon-containing ash in the fly ash, the cloth bag dust collector 10 is used for enriching the mineral components in the fly ash, and the combustion furnace 1 is used for fully combusting the carbon-containing ash enriched by the electric dust collector 9 in a circulation area.

Specifically, the upper portion of burning furnace 1 outwards extrudes along circumference and forms delay portion 2, delay portion 2 is the trapezium structure along the cross-section, the diameter of delay portion 2 lower extreme is less than the diameter of upper end, and the internal diameter of delay portion 2 lower extreme equals the internal diameter of burning furnace 1, all establish a plurality of backward flows 15 at the top of delay portion 2 along circumference, backward flow 15 passes through discharging pipe 8 and the honeycomb duct 7 intercommunication of loop configuration, the gas outlet 6 and the electric dust collector 9 of burning furnace 1 top are connected, electric dust collector 9's storage hopper 11 through return pipe 12 with the feed inlet of honeycomb duct 7 is connected, material seal pump 13 sets up on return pipe 12.

The draft tube 7 is fitted around the outside of the combustion furnace 1, and the draft tube 7 is located above the retention section 2.

In addition, a filling opening 5 is arranged at the side part of the combustion furnace 1, and a slag discharge opening 4 is arranged in an air inlet 3 of the combustion furnace 1.

During operation, fly ash in the combustion furnace sequentially enters the electric dust removal device and the cloth bag dust removal device which are arranged in series through the air outlet, carbon-containing ash is stored in the storage hopper and is conveyed to the flow guide pipe through the material sealing pump, and enters the detention part through the return port, and under the combined action of the downward wind power of the detention part and the vertically upward wind power at the bottom of the combustion furnace, an annular flow area is formed in the detention part, so that the fly ash is fully combusted in the combustion furnace, and the problem that the fly ash of the existing combustion furnace has high carbon content is effectively solved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The carbon-containing fly ash recycling system based on the electric bag dust remover is characterized by comprising a combustion furnace, wherein the upper part of the combustion furnace protrudes outwards along the circumferential direction to form a retention part, a plurality of backflow ports are arranged on the retention part, the backflow ports are communicated with a flow guide pipe of an annular structure, an air outlet of the combustion furnace is connected with an electric dust removal device, and a storage hopper of the electric dust removal device is connected with the flow guide pipe through a material sealing pump.

2. The carbonaceous fly ash recycling system of claim 1, wherein the retention section has a trapezoidal structure in cross section.

3. The system of claim 1, wherein the plurality of discharge pipes are disposed on each of the plurality of flow pipes, and the discharge pipes are in communication with the return port.

4. The system of claim 1, wherein a return pipe is disposed between the feed inlet of the flow guide pipe and the storage hopper, and the material sealing pump is disposed on the return pipe.

5. The system for recycling fly ash containing carbon according to claim 1, wherein the flow guide pipe is fitted around the outside of the combustion furnace, and the flow guide pipe is located above the retention section.

6. The system of claim 1, wherein the output of the electrical dust removal device is connected to a bag-type dust removal device.

7. The carbonaceous fly ash recycling system of claim 1, wherein the furnace further comprises a side-located charge port and a bottom-located slag discharge port.

8. The carbonaceous fly ash recycling system of claim 1, wherein the inner diameter of the narrower end of the retention section is equal to the inner diameter of the combustion furnace.