CN2316615Y

CN2316615Y - Dust filtering boiling vertical kiln

Info

Publication number: CN2316615Y
Application number: CN 97245343
Authority: CN
Inventors: 马殿杨; 马力峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-30
Filing date: 1997-09-30
Publication date: 1999-04-28
Anticipated expiration: 2007-09-30

Abstract

The utility model belongs to a vertical kiln which can be used for calcining cement clinker. The utility model is composed of a fume outlet 3, a feeding cylinder 5, a conic distributor 6, a blanking passage, an outer separation chamber plate 13 and an inner chamber separation plate 8, wherein, the upper end surface of a kiln body 1 is provided with the fume outlet 3; a central position is provided with the feeding cylinder 5; the conic distributor 6 is fixed in the kiln body of the lower side of the feeding cylinder; the blanking passage which is composed of an inner ring folded plate 9 and an outer ring folded plate 10 is fixed between the circumference and the kiln surface of the conic distributor; the outer separation chamber plate 13 is fixed between the outer ring folded plate of the upper part of the blanking passage and the kiln body; the inner chamber separation plate 8 is fixed in the center of the inner ring folded plate of the lower part of the blanking passage. The utility model can fundamentally solve the problems of side wind surplus, poor middle ventilation, deep bottom water, big junction block and nonuniform calcination, and the quality of clinker can be obviously enhanced.

Description

Filter dirt vertical fluidized kilm

The utility model belongs to a kind of used shaft kiln of calcination of cement clinker that is used for.

Existing cement in vertical kiln is that raw material and fuel are mixed by a certain percentage, after adding the water balling-up, throw to the kiln face from the kiln top by distributing device, material from top to bottom, air-flow contrary motion from bottom to top, finish pre-burning (containing drying, preheating, decomposition reaction), calcining, the cooling procedure of material, after device for discharging draw off.Because the shaft kiln calcination grog has the heat transfer efficiency height, advantages such as hear rate is low, construction investment is few, instant effect, so in a period of time, shaft kiln is developed rapidly in China, uses shaft kiln also very general abroad.But, existing shaft kiln also has weak point seriously, as: because edge effect, limit wind is crossed Sheng, apoplexy is bad, the burning of fuel is slow, and fire in a stove before fuel is added pull and stretch is subjected to the pressure of the top bed of material easily to tie bulk simultaneously, form vicious circle, limit wind is more contained, and heat engineering state is unstable uneven in the kiln, directly has influence on the quality of grog.Compare with regard to present employed shaft kiln and rotary kiln, the ripe quality that shaft kiln is produced is not so good as the quality that rotary kiln is produced grog, and therefore external most of shaft kiln is progressively substituted by rotary kiln.Also clearly propose restriction in China and set up kiln again, advocate the decision-making of development rotary kiln.In view of this, for the structure of improving shaft kiln, the shortcoming that overcomes present shaft kiln is very necessary.

The purpose of this utility model is, to ventilate in the middle of strengthening to reach control limit wind through improving the feed-type of material; eliminate the pressure of the heat zone top bed of material, the normal distribution of protection burning zone realizes fluidized calcination; improve the quality of shaft kiln calcination grog, thoroughly solve the shaft kiln that dust discharge is polluted.

The utility model is achieved in that it utilizes present shaft kiln body, replace traditional feed-type with the feed-type after improving, structure after it improves is: in upper surface of fixed installation, the upper end of kiln body, at barrel of the center of this upper surface fixed installation, the upper surface in the barrel outside is provided with exhanst gas outlet.Be installed with a taper tripper in the kiln body below barrel, the outer peripheral lower end of taper tripper by the annular blanking channel that interior ring flap and outer shroud flap constitute, makes material form the vertical bed of material of annular to fixed installation between the kiln face.In order to make the high-temperature gas that rises in the kiln body repeatedly pass this annular bed of material, separate space plate outside on the inwall of kiln body and the annular space between the outer shroud flap, being installed with, outside below the separate space plate, be installed with an interior separate space plate on the centre bore that is surrounded by interior ring flap.Like this, outer separate space plate, interior separate space plate just are divided into from bottom to top three sections of I, II, III to the bed of material, and the reinforced cavity segment of shaft kiln body is divided into A, B, four chambers of C, D.The operation principle of this shaft kiln is: the air that blasts from kiln body bottom rises along the inner chamber of kiln body, when the grog that has burnt till is cooled off, also improved the temperature of self, for the burning of fuel in the kiln provides condition, mist after the burning, with greater than critical speed by light thin, and most of pellet layer that decomposes forms fluidization and even fluidized state.Thermal current enters space, A chamber, because of stopping of separate space plate in being subjected to, just pass through the vertical annular bed of material of I section to space, B chamber with subcritical speed, mix in the B chamber with limit wind, the mixing hot gas that enters the B chamber will be subjected to stopping again with subcritical speed by the B chamber by the II section annular bed of material to the C chamber of outer separate space plate equally, the gas of C chamber passes through the III section annular bed of material again to the D chamber, after the exhanst gas outlet discharge.

This shaft kiln is when ordinary production, the annular bed of material is constantly moved to high temperature section by low temperature, the III section is a preheating section, by the preheating oven dry, can remove most of physics moisture, the II section is a dryer section, remove the dehydration of whole physics moisture and most of kaolin, the I section is finished whole kaolin dehydrations, and pellet center fuel takes fire, carbonate decomposition, its resolution ratio can reach 60-80%.

The utility model has the advantages that: 1. it can solve at all limit wind cross Sheng, middle part improper ventilation, the fire in a stove before fuel is added dark, tie bulk, calcine unequal shortcoming, the fuel of pellet can both fully be burnt, the quality of grog obviously improves.Free calcium can drop to below 2.5% in the grog, and the existing shaft kiln of strength ratio improved the 3-5 MPa in 28 days; 2. the unit-hour output of grog can have raising significantly; 3. make thermal current through three sections annular bed of materials, also can play a material dedusting effect, the discharging of flue gas is up to state standards.4. owing to do not tie bulk in the calcining in the kiln, grog is loose, and the power of discharging reduces, and wearing and tearing alleviate; The cooling of grog well simultaneously also can reduce blast pressure, energy savings.

Fig. 1 is a structure principle chart of the present utility model.

Below in conjunction with accompanying drawing the utility model is described in detail.

The said kiln body 1 of the utility model is traditional version, and at end face of the top of kiln body 1 fixed installation, barrel 5 just is fixed on the center of kiln body 1 upper surface, is used for installing additional in kiln material.Top at kiln body 1 also is provided with exhanst gas outlet 3, so that get rid of flue gas.For material is joined in the kiln body 1 around, be installed with a taper tripper 6 in the kiln body 1 below barrel 5.Form the annular bed of material between taper tripper 6 and the kiln face in order to make, the annular blanking channel that constitutes by interior ring flap 9 and outer shroud flap 10 to fixed installation between the kiln face at the lower limb of taper tripper 6, and be installed with an interior separate space plate 8 in the centre bore middle and lower part that interior ring flap 9 is surrounded, be installed with separate space plate 13 outside on the toroidal cavity between the middle and upper part of annular material dropping channel outer shroud flap 10 and kiln body 1 inwall, separate space plate 9 and outer separate space plate 10 just are divided into I with blanking channel like this, II, three sections of III, and the space of the feed part of giving kiln body 1 is divided into A with taper tripper 6, B, C, four chambers of D.

In order to consider the service life of parts, the serious scaling loss of unlikely short-term, the temperature of A chamber are controlled at 800 ℃-1050 ℃, and the temperature of C chamber is controlled at 400 ℃-450 ℃ for best.In order to adjust the temperature of C chamber, prevention is too low because of the temperature of C chamber, pellet moisture is humidification again, in the center of barrel 5 a vertical linear elevating mechanism 4 is installed downwards, control valve 7 that matches with interior separate space plate 8 of lower end fixed installation of linear elevating mechanism 4.Like this, when the temperature of C chamber is hanged down, open control valve 7, just the high-temperature gas of A chamber can be introduced the C chamber, the temperature of C chamber is risen, when the temperature of C chamber rises to a certain degree, just can close control valve 7 by linear elevating mechanism 4.Therefore the room temperature and the gas pressure of this annular each section of bed of material temperature and A, B, C, D chamber can be used instrument temperature control, handling safety.

For being ventilated, the Bian Fengyu middle part is complementary, kiln face place at kiln body 1 is provided with limit wind adjusting device 11 from annular material road to formed toroidal cavity the inwall of kiln body 1, limit wind adjusting device 11 is a kind of horizontal adjustable plates that are installed on the kiln body 1, be used to regulate the gap between annular material and kiln body 1 inwall, to reach the purpose of control limit wind, solve an edge effect difficult problem.This adjusting device also can be used for regulating inclined to one side fire.Be provided with observation door 2 on the top of kiln body 1, be used to observe and handle the problem that may occur.If new kiln igniting, the ignition charge door 12 on the available kiln body 1 carries out.

In order to make along the bed of material of taper tripper 6 whereabouts, also can become the ventilative bed of material, to increase the ventilative area of the bed of material, taper tripper 6 can be made the bullet of band air-vent.

In order to control thickness of feed layer on the tripper surface, barrel 5 is preferably made adjustable casing drum.

In order to prevent that material bed the generation from taking arch between interior ring flap 9 and outer shroud flap 10, influence the whereabouts of the bed of material, the preferably employing installation that is staggered up and down between interior ring flap 5 and the outer shroud flap 10.

Claims

1, filter dirt vertical fluidized kilm, it includes kiln body (1), it is characterized in that: be installed with a barrel (5) in the center, upper surface of kiln body (1), the kiln body end face of barrel (5) side is provided with exhanst gas outlet (3), be installed with a taper tripper (6) in the kiln body (1) below barrel (5), taper tripper (6), lower end all around is installed with the annular blanking channel that is made of ring flap (9) and outer shroud flap (10) to the kiln body (1) between the kiln face, separate space plate (13) outside being installed with between the inwall of the outer shroud flap (10) of annular blanking channel middle and upper part and kiln body (1), separate space plate (8) constitutes in being installed with on the center hole that annular blanking channel middle and lower part is surrounded by interior ring flap (9).

2, filter dirt vertical fluidized kilm according to claim 1, it is characterized in that: a vertical linear elevating mechanism (4) is installed in the center of barrel (5), and the lower end of linear elevating mechanism (4) is installed with a control valve (7) that matches with interior separate space plate (8).

3, filter dirt vertical fluidized kilm according to claim 1 and 2 is characterized in that: be provided with limit wind adjusting device (11) on the toroidal cavity that is constituted between the annular blanking channel at kiln face place and kiln body (1) inwall in kiln body (1).

4, filter dirt vertical fluidized kilm according to claim 1 and 2 is characterized in that: said taper tripper (6) is a bullet that has air-vent.

5, filter dirt vertical fluidized kilm according to claim 3 is characterized in that: said taper tripper (6) is a bullet that has air-vent.

6, filter dirt vertical fluidized kilm according to claim 1 and 2 is characterized in that: be the installation that is staggered up and down between interior ring flap (9) and the outer shroud flap (10).

7, filter dirt vertical fluidized kilm according to claim 3 is characterized in that: be the installation that is staggered up and down between interior ring flap (9) and the outer shroud flap (10).

8, filter dirt vertical fluidized kilm according to claim 4 is characterized in that: be the installation that is staggered up and down between interior ring flap (9) and the outer shroud flap (10).

9, filter dirt vertical fluidized kilm according to claim 5 is characterized in that: be the installation that is staggered up and down between interior ring flap (9) and the outer shroud flap (10).