CN1514163A

CN1514163A - Melting furnace having chalkstone out-furnace decomposition device

Info

Publication number: CN1514163A
Application number: CNA021566208A
Authority: CN
Inventors: 诚张; 张�诚
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-17
Filing date: 2002-12-17
Publication date: 2004-07-21
Anticipated expiration: 2022-12-17
Also published as: CN1221764C

Abstract

The device is composed of vertical lift leg and cyclone separator. The bottom part of vertical lift leg is connected to outlet of combustion chamber of melting furnace to send limestone particles with diameter less than 1.5 mm to vertical lift leg being connected to outlet of melting cyclone furnace by wind force. The particles are decomposed quickly by high temperature smoke in lift leg as thermal state smoke velocity in lift leg is not less than 10 m/s if the largest particle diameter is 1-1.5 mm and not less than 7 m/s if the largest particle diameter is 0.6-1 mm to ensure decomposing course. The vertical height of left leg is 6-12 m and separation of particle and gas is finalized by cyclone separator.

Description

The molten grey stove of the outer decomposer of band lime stone stove

The present invention is the molten grey stove of a kind of slag tap, particularly a kind of molten grey stove with the outer decomposer of lime stone stove.Most of boiler fly ash all can not obtain the application of high value, often needs to throw aside, and not only occupies the farmland but also cause water body and dust pollution, is a great problem of big-and-middle-sized thermal power plant.The slag tap cyclone furnace is a kind of combustion technology of maturation, and the liquid slag of fusing is discharged with the vitreum particle after water-cooled, and is no longer water-soluble, also can secondary fly-up.Calcium enriched cyclone-furnace slag has good basic active, is good building materials raw material.Be subjected to the inspiration of slag tap cyclone furnace, Zhang Cheng, Yin Dazhong once united a large amount of ash melting furnace technology of declaring, its core is to utilize the solid thermal carriers technology to add hot-air with flue gas heat, obtains the high-temperature preheated air, is intended to more greyly melt with low fuel consumption and little combustion chamber volume.In view of the key in the flying dust fusion process is to reduce ash fusion point and the flowability of improving liquid slag with the adding lime stone, and the molten grey ability of the unit volume that lime stone divides heat of desorption will significantly reduce the combustion chamber in the combustion chamber.If lime stone is decomposed outside stove in advance, with the molten grey ability of the unit volume that significantly improves the ash melting furnace combustion chamber, thus the consumption and the investment of further lowering fuel.

The present invention is achieved in that decomposer outside the ash melting furnace combustor exit is provided with the lime stone stove, and this device mainly is made up of vertical-lift pipe and cyclone separator.Vertical-lift pipe bottom and ash melting furnace combustor exit close-coupled, particle diameter is sent into the vertical-lift pipe that links to each other with molten grey cyclone furnace outlet less than the limestone particle of 1.5mm with the wind-force form of sowing, limestone particle enters the rapid decomposes of high-temperature flue gas, they had not only absorbed physics heat but also had absorbed branch analgesic, high-temperature flue gas will be cooled off rapidly, and the gas speed of vertical-lift pipe is the assurance that particle promotes.If lime stone the largest particles diameter is 1-1.5mm, then the hot cigarette speed in the vertical-lift pipe is not less than 10m/s; If maximum particle diameter is 0.6-1mm, then hot cigarette speed should be not less than 7m/s, and the time of staying of particle in the riser separator should guarantee finishing of decomposable process.The vertical height of vertical-lift pipe is a 6-12 rice, and flue gas and limestone particle enter cyclone separator, finishes separating of particle and gas in cyclone separator.Particle is penetrated the equal pressure hoisting mechanism by J type valve, high temperature flapper or combustion air guiding and is entered in the combustion chamber, when the lime stone amount that adds in every standard cubic meter flue gas is no more than 250g, the flue-gas temperature of leaving cyclone separator is not less than 850 ℃, can guarantee the good decomposition of lime stone.

Description of drawings: accompanying drawing is a structural representation of the present invention.

Claims

1. decomposer outside ash melting furnace combustor exit installing lime stone stove.

2. according to claim 1, the outer decomposition of limestone device of stove mainly is made of vertical-lift pipe bottom and ash melting furnace combustor exit close-coupled vertical-lift pipe and cyclone separator.

3. according to claim 1, the form that the largest particles diameter is sowed with wind-force less than the limestone particle of 1.5mm is sent into the vertical-lift tube inlet.

4. according to claim 3, hot cigarette speed is not less than 10m/s in the riser when being 1-1.5mm when maximum of lime stone, and when the maximum grain warp of lime stone was 0.6-1mm, hot cigarette speed was not less than 7m/s.

5. according to claim 2, the lime particle that is separated by cyclone separator enters in the combustion chamber through boost in pressure mechanism.