CN213671075U

CN213671075U - Fly ash multistage sorting system

Info

Publication number: CN213671075U
Application number: CN202022461822.3U
Authority: CN
Inventors: 苏立新; 陈建英; 牛国平; 周虹光; 张超; 李强; 李庆芝; 刘源
Original assignee: Xian Thermal Power Research Institute Co Ltd; Xian Xire Boiler Environmental Protection Engineering Co Ltd
Current assignee: Xian Thermal Power Research Institute Co Ltd; Xian Xire Boiler Environmental Protection Engineering Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-07-13
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a multistage sorting system of fly ash, including former ash storehouse, the forced draught blower, the trunk line, the granularity sorter, thick ash storehouse, superfine sorter, II grades of ash storehouses, superfine ash storehouse, steam fluid energy milling device, I grades of ash storehouses, high-efficient sack cleaner and super superfine ash storehouse, the export of thick ash storehouse is linked together with steam fluid energy milling device's entry, the export of high temperature steam pipeline is linked together through the steam inlet of Laval nozzle with steam fluid energy milling device, steam fluid energy milling device's thick ash export is linked together with the entry of I grades of ash storehouses, steam fluid energy milling device's thin ash export is linked together with the entry of high-efficient sack cleaner, the granule export of high-efficient sack cleaner is linked together with the entry of super superfine ash storehouse, this system can realize the multistage sorting of fly ash.

Description

Fly ash multistage sorting system

Technical Field

The utility model belongs to coal fired power plant's fly ash comprehensive utilization field relates to a multistage sorting system of fly ash.

Background

In recent years, China vigorously promotes and promotes the industrialization, the large-volume and the high-added-value utilization of the fly ash. About 60-80% of the fly ash is glass beads, the glass beads can be applied to products such as fireproof materials, refractory materials, heat-insulating materials, ceramics, granite, rubber, plastic high polymer materials and the like, the requirements on the granularity of the fly ash glass beads in different application fields are different, and the market value of the glass beads is 4-5 times that of I-grade ash. At present, the problem of unbalanced development of fly ash in China regions is more prominent, and the comprehensive utilization level of coal resources and the concentrated fly ash in the north of a thermal power plant is lower. Although the utilization rate of the fly ash in coastal and economically developed southern areas is higher, the fly ash is still in a rough utilization stage, the fineness of the fly ash is controlled according to 45 mu m, the fly ash is mainly applied to producing cement, concrete and mortar admixtures and wall materials (building blocks, sintered bricks and the like), the fine utilization rate and the economic added value of the fly ash are low, and the fly ash has higher market value and needs to be fully excavated.

With the issuance and execution of documents such as 'comprehensive utilization management method of fly ash' and 'construction trial work plan of non-waste cities', national policies are vigorously popularized and promote the industrialization and large-scale high-added-value utilization of fly ash. However, the fineness of the existing fly ash sorting system is controlled according to 45 μm, the high added value of the fly ash is not fully excavated, and how to realize the multi-stage sorting of the fly ash becomes a central importance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a multistage sorting system of fly ash, this system can realize the multistage sorting of fly ash.

In order to achieve the purpose, the coal ash multistage separation system comprises a raw ash warehouse, a blower, a main pipeline, a granularity separator, a coarse ash warehouse, an ultrafine separator, a II-grade ash warehouse, an ultrafine ash warehouse, a steam jet milling device, an I-grade ash warehouse, a high-efficiency bag-type dust collector and an ultrafine ash warehouse;

the outlet of the raw ash bin and the outlet of the air feeder are communicated with the inlet of the main pipeline, the outlet of the main pipeline is communicated with the inlet of the particle size separator, the coarse ash outlet of the particle size separator is communicated with the inlet of the coarse ash bin, the fine ash outlet of the particle size separator is communicated with the inlet of the superfine separator, the coarse ash outlet of the superfine separator is communicated with the inlet of the II-grade ash bin, and the fine ash outlet of the superfine separator is communicated with the superfine ash bin;

the outlet of the coarse ash storehouse is communicated with the inlet of the steam jet mill, the outlet of the high-temperature steam pipeline is communicated with the steam inlet of the steam jet mill through a Laval nozzle, the coarse ash outlet of the steam jet mill is communicated with the inlet of the I-grade ash storehouse, the fine ash outlet of the steam jet mill is communicated with the inlet of the high-efficiency bag-type dust collector, and the particle outlet of the high-efficiency bag-type dust collector is communicated with the inlet of the ultra-fine ash storehouse.

The outlet of the raw ash storehouse is communicated with the main pipeline through an air chute.

A flap valve is arranged between the coarse ash outlet of the particle size separator and the coarse ash warehouse.

The outlet of the coarse ash storehouse is communicated with the steam jet milling device through a screw feeder.

The coarse ash outlet of the steam jet milling device is communicated with the I-grade ash storehouse through a first Roots blower.

The outlet of the high-efficiency bag-type dust collector is communicated with the ultra-fine ash storehouse through a second Roots blower.

The utility model discloses following beneficial effect has:

when the coal ash multistage separation system of the utility model is operated, the steam jet mill is adopted to crush the coarse ash separated by the particle size separator, then sorting the fly ash glass beads with different grain size grades, collecting the fly ash glass beads to a corresponding ash storehouse by a high-efficiency bag-type dust collector, further sorting fine ash sorted by a grain size sorting machine, so as to obtain the fly ash glass beads with different grain size grades, and finally the fly ash glass beads are collected to a corresponding ash storehouse by a high-efficiency bag-type dust collector, compared with the conventional mechanical crushing device, the steam jet crushing device has low system energy consumption, can maintain the bead structure of the fly ash, has strong crushing force, can obtain finer fly ash grain size, in addition, the flow velocity of high-temperature steam passing through the Laval nozzle can reach supersonic speed, the crushing force is strong, the micro-bead structure of the fly ash can be maintained, meanwhile, the finer fly ash granularity is obtained, and the sorting efficiency is up to 95%.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein, 1 is an air chute, 2 is a main pipeline, 3 is a blower, 4 is a granularity separator, 5 is a tongue plate valve, 6 is an ultrafine separator, 7 is a high-efficiency bag-type dust collector, 8 is a screw feeder, 9 is a steam jet milling device, 101 is a first Roots blower, 102 is a second Roots blower, 11 is a coarse ash warehouse, 12 is a II-level ash warehouse, 13 is an ultrafine ash warehouse, 14 is an I-level ash warehouse, 15 is an ultrafine ash warehouse, and 16 is an original ash warehouse.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings:

referring to fig. 1, the multi-stage separation system for fly ash according to the present invention includes a raw ash silo 16, a blower 3, a main pipeline 2, a particle size separator 4, a coarse ash silo 11, an ultra-fine separator 6, a second ash silo 12, an ultra-fine ash silo 13, a steam jet mill 9, a first ash silo 14, a high efficiency bag-type dust collector 7, and an ultra-fine ash silo 15; an outlet of the raw ash bin 16 and an outlet of the air feeder 3 are communicated with an inlet of the main pipeline 2, an outlet of the main pipeline 2 is communicated with an inlet of the granularity sorting machine 4, a coarse ash outlet of the granularity sorting machine 4 is communicated with an inlet of the coarse ash bin 11, a fine ash outlet of the granularity sorting machine 4 is communicated with an inlet of the superfine sorting machine 6, a coarse ash outlet of the superfine sorting machine 6 is communicated with an inlet of the II-grade ash bin 12, and a fine ash outlet of the superfine sorting machine 6 is communicated with the superfine ash bin 13; an outlet of the coarse ash bin 11 is communicated with an inlet of a steam jet mill 9, an outlet of a high-temperature steam pipeline is communicated with a steam inlet of the steam jet mill 9 through a Laval nozzle, a coarse ash outlet of the steam jet mill 9 is communicated with an inlet of a first-level ash bin 14, a fine ash outlet of the steam jet mill 9 is communicated with an inlet of a high-efficiency bag-type dust collector 7, and a particle outlet of the high-efficiency bag-type dust collector 7 is communicated with an inlet of an ultra-fine ash bin 15.

The outlet of the raw ash storehouse 16 is communicated with the main pipeline 2 through an air chute 1; a tongue plate valve 5 is arranged between the coarse ash outlet of the particle size separator 4 and the coarse ash storehouse 11.

The outlet of the coarse ash storehouse 11 is communicated with the steam jet milling device 9 through the screw feeder 8; the coarse ash outlet of the steam jet milling device 9 is communicated with the I-grade ash storehouse 14 through a first Roots blower 101; the outlet of the high-efficiency bag-type dust collector 7 is communicated with the ultra-fine ash storehouse 15 through a second Roots blower 102.

The utility model discloses a concrete working process does:

the raw ash output from the raw ash storehouse 16 enters a main pipeline 2 through an air chute 1, is mixed with airflow in the main pipeline 2 into gas-solid two-phase flow, then enters a granularity sorting machine 4 under the action of an air feeder 3 to separate coarse ash and fine ash, wherein the separated coarse ash enters a coarse ash storehouse 11 through a flap valve 5, the separated fine ash enters an ultrafine sorting machine 6 through volutes at two sides of the granularity sorting machine 4 under the action of the airflow to be sorted, wherein the sorted ultrafine ash is collected into an ultrafine ash storehouse 13 by a high-efficiency bag dust collector 7, and the fly ash sorted by the ultrafine sorting machine 6 meets the II-level ash standard and is finally stored in a II-level ash storehouse 12. The high-temperature steam enters the steam airflow crushing device 9 after the flow velocity of the high-temperature steam reaches the supersonic velocity through the Laval nozzle, the coarse ash in the coarse ash storehouse 11 enters the steam airflow crushing device 9 through the screw feeder 8, the coarse ash is crushed by high-temperature steam in a high-speed collision manner, the crushed coal ash is subjected to forced vortex classification, the qualified ultra-fine ash is collected through the high-efficiency bag-type dust collector 7 and finally enters the ultra-fine ash storehouse 15 through the second Roots blower 102, the coarse ash difficult to crush meets the I-level ash standard, and finally the coarse ash is conveyed to the I-level ash storehouse 14 through the first Roots blower 101.

The utility model discloses the energy consumption is low, and conventional mechanical crushing device's energy conversion form is fuel → superheated steam's potential energy and heat energy → mechanical energy → electric energy → mechanical energy → material granule, and steam air flow crushing device 9's energy conversion form is fuel → superheated steam's potential energy and heat energy → superheated steam's kinetic energy → material granule, has lacked two loss processes for conventional mechanical crushing system, and the system energy consumption is lower.

The utility model discloses can obtain the fly ash glass bead of different particle size grades, the thick ash after the steam jet milling device 9 is selected separately granularity sorter 4 is smashed, then selects the fly ash glass bead of different particle size grades, and the cut apart particle size of high-efficient sorter 5-20 mu m is adjustable, and the fly ash glass bead of different particle size grades can be used in the field of difference, can fully excavate the added value of fly ash.

Finally, the utility model discloses little to environmental pollution, the utility model discloses a superfine fly ash is collected to high-efficient sack cleaner 7, and the filter material composition is PTFE base cloth + (40% PTFE + 30% PPS + 30% superfine PPS) fibre, and 30% superfine PPS fibre is used for the filtering surface layer, chooses imported product PPS fibre for use, and export emission concentration is less than 10mg/m³。

Claims

1. A fly ash multi-stage sorting system is characterized by comprising an original ash silo (16), a blower (3), a main pipeline (2), a granularity sorting machine (4), a coarse ash silo (11), an ultrafine sorting machine (6), a II-stage ash silo (12), an ultrafine ash silo (13), a steam airflow crushing device (9), an I-stage ash silo (14), a high-efficiency bag-type dust collector (7) and an ultrafine ash silo (15);

an outlet of the raw ash bin (16) and an outlet of the air feeder (3) are communicated with an inlet of the main pipeline (2), an outlet of the main pipeline (2) is communicated with an inlet of the granularity sorting machine (4), a coarse ash outlet of the granularity sorting machine (4) is communicated with an inlet of the coarse ash bin (11), a fine ash outlet of the granularity sorting machine (4) is communicated with an inlet of the superfine sorting machine (6), a coarse ash outlet of the superfine sorting machine (6) is communicated with an inlet of the II-level ash bin (12), and a fine ash outlet of the superfine sorting machine (6) is communicated with the superfine ash bin (13);

an outlet of the coarse ash bin (11) is communicated with an inlet of a steam jet mill (9), an outlet of a high-temperature steam pipeline is communicated with a steam inlet of the steam jet mill (9) through a Laval nozzle, a coarse ash outlet of the steam jet mill (9) is communicated with an inlet of a first-level ash bin (14), a fine ash outlet of the steam jet mill (9) is communicated with an inlet of a high-efficiency bag-type dust collector (7), and a particle outlet of the high-efficiency bag-type dust collector (7) is communicated with an inlet of an ultra-fine ash bin (15).

2. The fly ash multi-stage sorting system according to claim 1, wherein the outlet of the raw ash silo (16) is communicated with the main pipe (2) via an air chute (1).

3. The fly ash multistage separation system according to claim 1, wherein a flapper valve (5) is provided between the coarse ash outlet of the particle size separator (4) and the coarse ash silo (11).

4. The fly ash multistage separation system according to claim 1, wherein the outlet of the coarse ash silo (11) is communicated with the steam jet milling device (9) through a screw feeder (8).

5. The fly ash multistage separation system according to claim 1, wherein the coarse ash outlet of the steam jet milling device (9) is communicated with the I-stage ash silo (14) through a first Roots blower (101).

6. The fly ash multistage separation system according to claim 1, wherein the outlet of the high-efficiency bag-type dust collector (7) is communicated with the ultra-fine ash storehouse (15) through a second Roots blower (102).