CN202030668U - Waste treatment device for guiding pyrolytic gas of waste into cement decomposing furnace - Google Patents
Waste treatment device for guiding pyrolytic gas of waste into cement decomposing furnace Download PDFInfo
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- CN202030668U CN202030668U CN2010205932086U CN201020593208U CN202030668U CN 202030668 U CN202030668 U CN 202030668U CN 2010205932086 U CN2010205932086 U CN 2010205932086U CN 201020593208 U CN201020593208 U CN 201020593208U CN 202030668 U CN202030668 U CN 202030668U
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Abstract
The utility model relates to a waste treatment device for guiding pyrolytic gas of waste into a cement decomposing furnace, which is arranged to be adjacent to a cement producing device (200) which is provided with a cement firing furnace (30), a grog cooling device (40) for cooling the firing product and a decomposing furnace (20) with high-temperature waste gas inflowing from any of the firing furnace and the grog cooling device. The waste treatment device is provided with a gasification furnace and a gas conveying passage (6), wherein the gasification furnace (1) is used for gasifying the waste to generate pyrolytic gas, and the gas conveying passage (6) is used for conveying the pyrolytic gas to the decomposing furnace (20) under the situation that the carbon content and the ash content are maintained. The pyrolytic gas is guided into the decomposing furnace (20) at the state that the pyrolytic gas is free from being directly interfered with main stream of the waste gas from the firing furnace (30) or the grog cooling device (40), so pyrolytic gas can be prevented from blowing across the decomposing furnace, and the pyrolytic gas can be adequately burned. Therefore, the present cement manufacturing device can be effectively utilized, and the sanitary treatment of the waste can be realized with low cost.
Description
Technical field
The utility model relates to contiguous cement making equipment setting, utilizes decomposing furnace wholesomely waste to be handled the offal treatment equipment of usefulness, particularly relates to effective utilization that this castoff heat decomposes the gas that obtains.
Background technology
In recent years, along with growth in the living standard, also more and more need rubbish is carried out sanitary measure, its burning disposal amount is among increase is also being predicted, but also the expense that general incinerator need be very big is built in existence, the problem of duration that need be very long.And the needs assessment incinerator, therefore needed long time and prepares near resident's public information the influence of surrounding environment before going into operation.And also exist in Japan and to bury the burying of ashes that incinerator takes place and handle an insufficient problem, to set up under the situation in new disposal site, the establishment that utilizes method again of the setting of grey melting furnace and ash etc. is a prerequisite.
On the other hand, cement industry has the trend of the part utilization that combustible waste is acted as a fuel always in order to reduce the cement manufacturing cost, has proposed effectively to utilize existing cement making equipment waste to be carried out the scheme of sanitary measure.
But, usually the thermal value of rubbish is about 1000～3000 kcal/kg, compare normally used fuel in cement kiln (under the situation of using the matchmaker, inferior grade matchmaker's thermal value is 5000～7000 kcal/kg) low, therefore when will be for example being sent to cement kiln and mixing burning from the thermolysis gas of rubbish, temperature in the kiln is on the low side, thereby the unfavorable possibility of combustion expense is also arranged.
And the water vapour that comprises in the thermolysis gas from rubbish has detrimentally affect to the proterties of cement clinker, when thermolysis gas burns in cement kiln, has the possibility that focus generates dirt settling takes place.
To this, the present inventor develops thermolysis gas that vapourizing furnace is taken place and offers the technology of the decomposing furnace or the firing furnace (kiln) of cement making equipment with carbon and ash content.Because the temperature of decomposing furnace is lower than kiln, approximately is about 900 ℃, is utilized effectively so thermolysis gas that here provides and carbon act as a fuel, ash content also becomes the part of cement raw material.
Again, in decomposing furnace, flow into, cement raw material is blown up,, be transported to preheater here with water vapour etc. while therefore the thermolysis gas that provides also burns and upwards blows as jet-stream wind from the high-temp waste gas in the kiln.Therefore, do not worry in kiln, to take place the problem of deterioration of cement clinker proterties and dirt settling.
The utility model content
As mentioned above, the thermolysis heat release in gas region of waste is lower, also contains many water vapour, therefore the fuel that can not say so ignition characteristic, have good burning performance.Therefore only thermolysis gas is being offered under the situation of decomposing furnace, might can come on from the exhaust flow of kiln by thermolysis gas, do not having abundant burning just to be discharged to preheater.
And, decomposing furnace not only forms the structure that pyritous kiln waste gas can flow into, and can flow into the high-temp waste gas (air) of clinker cooler, in this case, in a single day thermolysis gas catch up with the main flow of water cooler waste gas, will not have to skim over the decomposing furnace discharge under the clean-burning situation.
In view of such situation, the purpose of this utility model is, improves the method that thermolysis gas imports decomposing furnace, and thermolysis gas can fully be burnt in decomposing furnace.Can effectively utilize existing cement making equipment like this, reduce its running cost, can realize the sanitary measure of waste simultaneously.
To achieve these goals, the utility model is being object with possessing the cement firing furnace, its burned material being carried out the offal treatment equipment of the adjacent setting of cement making equipment that refrigerative clinker cooler and from this firing furnace or clinker cooler any one flow into the decomposing furnace of high-temp waste gas.And described offal treatment equipment possesses the vapourizing furnace that makes waste gasification generation thermolysis gas, will keep being transported under institute's carbon containing and the intact situation of ash content the gas delivery channels of described decomposing furnace at the thermolysis gas that described vapourizing furnace takes place, and the gas introduction unit of introducing thermolysis gas with the form that the air-flow of thermolysis gas does not directly interfere with the main flow from the high-temp waste gas of described firing furnace and clinker cooler that flows in this decomposing furnace from described gas delivery channels in decomposing furnace.
In such structure, castoff heat decomposes when thermolysis gas takes place in the vapourizing furnace of the offal treatment equipment that contiguous cement making equipment is provided with, and this thermolysis gas is imported the decomposing furnace of cement making equipment under maintenance institute's carbon containing and the intact situation of ash content.In decomposing furnace, there is high-temp waste gas to flow into from cement firing furnace and clinker cooler, the decarbonation reaction takes place in heating simultaneously in the course of conveying of cement raw material, if but under the state that main flow not direct and this powerful exhaust flow interferes, import thermolysis gas, thermolysis gas skims over decomposing furnace along with exhaust flow situation then can not take place.Thereby, can make the fully burning in decomposing furnace of thermolysis gas and carbon.Wherein, described offal treatment equipment is configured to make the described thermolysis gas hold-up that is introduced into described decomposing furnace to have at least when decomposing furnace more than 2 seconds with the temperature combustion more than 850 ℃.
As an example, also can be, described decomposing furnace has the tubular perisporium, and be configured to a end from its cylinder axis direction to the other end, form under the situation of main flow of the exhaust flow that described firing furnace or clinker cooler come, on described perisporium, point to Zhou Fangxiang as gas introduction unit introducing port is set, so that can around described tube axle, import thermolysis gas rotatably.Import the thermolysis gas in the decomposing furnace like this, center on the main flow rotation from the exhaust flow of described firing furnace, direct and this main flow interferes.
The perisporium of common described decomposing furnace is configured to extend upward at upper and lower, so that the waste gas that its lower end flows into from firing furnace or clinker cooler constitutes jet flow, points upwards.Opposite with it, also can import thermolysis gas with the angle of inclination of downward-sloping regulation with respect to the horizontal plane from gas introduction port, the angle of inclination of described regulation can be bigger and below 40 degree, so, thermolysis gas just is not easy to follow exhaust flow and flows than 0 degree.If but downward-sloping excessive, then the rotation composition of thermolysis gas stream (speed of horizontal direction) is little, thus gas introduction port inclination maximum with respect to the horizontal plane also be less than 40 the degree, preferably 30 the degree below.
And since from the vapourizing furnace to the cement making equipment gas delivery channels of one side be level basically, therefore get final product in that gas introduction port is downward-sloping at least.
And the flow velocity Gao Zeyou of the thermolysis gas that comes from described gas introduction port prevents the effect that above-mentioned stores results in blockage, if flow velocity is too high, then the pressure-losses at gas introduction port increases, and therefore also can import thermolysis gas with the flow velocity of 5～30m/s.
But routine as prior art recited above, described offal treatment equipment is configured to make the waste gas of firing furnace to flow under the perisporium lower end situation of decomposing furnace, the air introducing port that the air of burning usefulness is introduced is set in this perisporium bottom usually, but also can utilize will the burn air of usefulness of this air introducing port to introduce, and be introduced into with making this air-flow and the same direction rotational flow of thermolysis gas.If do like this, the swirling eddy of thermolysis gas and the swirling eddy of this combustion air are strengthened on one side mutually, by thorough mixing improve ignition characteristic and the combustionproperty of thermolysis gas on one side.
For this reason, preferably the air introducing port also is set to the extension of with respect to the horizontal plane downward-sloping predetermined angular ground, on the predetermined distance above this air introducing port gas introduction port is set simultaneously.The angle of inclination of air introducing port and the angle of inclination of gas introduction port are roughly the same, or than its slightly little getting final product.
So, below the eddy flow of thermolysis gas, keep appropriate intervals to form the eddy flow of combustion air, the exhaust flow that upwards flows through in the decomposing furnace at first interferes with the eddy flow of combustion air.Therefore the interference of the eddy flow of the main flow of waste gas and thermolysis gas is suppressed.And upwards pushed away by the eddy flow of the combustion air eddy flow that pushes away on the waste gas main flow direction that rises with thermolysis gas, both mix simultaneously mutually by upwards forming the spirrillum eddy flow in the decomposing furnace.
Again, connect the pipeline of circulation in above-mentioned decomposing furnace lower end, the bending of L font takes place, turn to the inlet of firing furnace but this pipeline extends the back usually downwards from the next waste gas of firing furnace.So, being subjected to the effect of the power that the inner-walls of duct face comes by the exhaust flow that changes direction in this L font pipeline upward, change to firing furnace one lateral deviation, so gas introduction port also can be arranged on the perisporium of opposition side of firing furnace one side.
And, also can on the perisporium of above-mentioned firing furnace, micro fine carbon dust and the such normally used fuel feed mouth of heavy oil nearby be set at gas introduction port.So, the better fuel of specific heat decomposition gas ignition quality catches fire earlier, becomes kindling material, can expect to improve the ignition quality of thermolysis gas.In this case, also can reduce the supply of these fuel, avoid fuel consumption air such as micro fine carbon dust and heavy oil.
Again, in above-mentioned offal treatment equipment, vapourizing furnace is provided with under the situation more than two, the thermolysis gas of plural gas delivery channels to carry each vapourizing furnace is set, also each gas delivery channels can be communicated with the plural gas introduction port of the perisporium of above-mentioned decomposing furnace respectively.In this case, also can on Zhou Fangxiang, keep arranged spaced mutually by plural gas introduction port.
If change view, the utility model is to have the cement firing furnace, its burned material is carried out the refrigerative clinker cooler, and the cement making equipment of the decomposing furnace that flows into from any one high-temp waste gas of this firing furnace or clinker cooler, possesses the gas delivery channels that the thermolysis gas of waste is carried under maintenance institute's carbon containing and the intact situation of ash content, and in decomposing furnace, introduce thermolysis gas from this gas delivery channels, and the air-flow that makes this thermolysis gas not with this decomposing furnace in the gas introduction unit that interferes of the main flow from exhaust flows such as above-mentioned firing furnaces.If adopt this cement making equipment, then can realize the sanitary measure of waste with low cost.
As mentioned above, if employing the utility model, the thermolysis gas of decomposing furnace that then can prevent to transfer out and introduce cement making equipment from the vapourizing furnace of offal treatment equipment can make it fully burn in decomposing furnace along with the exhaust flow from firing furnace and clinker cooler is blown away.Thereby, can effectively utilize existing cement making equipment, and can when reducing running cost, realize the sanitary measure of waste.
Description of drawings
Fig. 1 is the offal treatment equipment of the utility model the 1st example and the system diagram of cement making equipment.
Fig. 2 A is a front view of observing the decomposing furnace shown in the rotary kiln in above-mentioned cement making equipment from the right side.
Fig. 2 B is a right hand view of observing decomposing furnace from the rotary kiln side.
Fig. 3 A is the front view that amplifies the bottom of expression decomposing furnace.
Fig. 3 B is the right hand view that amplifies the bottom of expression decomposing furnace.
Fig. 3 C is the left surface figure that amplifies the bottom of expression decomposing furnace.
Fig. 3 D is the vertical view that amplifies the bottom of expression decomposing furnace, and the part of decomposing furnace is omitted.
Fig. 4 A is the CFD mimic diagram of the kiln exhaust flow in the expression decomposing furnace.
Fig. 4 B is the figure suitable with Fig. 4 A of the airflow of expression burning usefulness.
Fig. 5 A is the figure suitable with Fig. 3 A that expression is provided with the variation of two gas introduction ports.
Fig. 5 B is the figure suitable with Fig. 3 B that expression is provided with the variation of two gas introduction ports.
Fig. 5 C is the figure suitable with Fig. 3 C that expression is provided with the variation of two gas introduction ports.
Fig. 5 D is the figure suitable with Fig. 3 D that expression is provided with the variation of two gas introduction ports.
Fig. 6 is the figure suitable with Fig. 1 that water cooler waste gas flows into the 2nd example of decomposing furnace.
Fig. 7 is the graphic representation of relation of the gas flow rate of expression angle of inclination of gas introduction port and horizontal direction.
Fig. 8 is that expression is from the graphic representation of thermolysis gas introduction port to the transition of the zero dimension standard deviation of the carbon monoxide concentration of short transverse.
Nomenclature:
100 offal treatment equipment;
1 vapourizing furnace;
6 gas delivery pipelines (gas delivery channels);
200 cement making equipments;
10 suspension preheaters;
20 decomposing furnaces;
21 lower pipeline;
23 side wall portions (cylindrical sidewall);
24 rakes;
25 air supplying openings;
26 fuel feed mouths;
27 gas introduction ports (gas introduction unit);
30 rotary kilns (firing furnace);
40 air quenching water coolers (clinker cooler).
Embodiment
With reference to the accompanying drawings ideal example of the present utility model is described.Fig. 1 is the offal treatment equipment 100 of the 1st example and the overall system diagram that is adjacent the cement making equipment 200 of setting.The offal treatment equipment 100 of left side expression makes castoff heat decompose in vapourizing furnace 1 among the figure, the gas (thermolysis gas) that takes place is used in mixed firing in the firing process of cement.
-offal treatment equipment-
The waste of in offal treatment equipment 100, collecting the general waste that family for example comes, the trade waste that comprises plastic waste etc. and comprising flammable object.These wastes ship by land conveying etc., are dropped into the interior hopper 2a of groove 2, utilize not shown crusher to carry out fragmentation.The broken like this waste utilization crane of crossing 3 is carried, and drops into the e Foerderanlage 4 that hopper and travelling belt etc. constitute, and delivers to vapourizing furnace 1 by means of the action of this e Foerderanlage 4.
As an example, illustrated vapourizing furnace 1 is the vapourizing furnace of mobile laminar, and mobile sand (flow media) layer that the bottom in stove forms is by means of air flowingization.The air that is sent to fluidised bed utilizes groove 2 sucking-offs of fan 5 from waste in legend, utilize supply line 5a to offer vapourizing furnace 1.Therefore remain in negative pressure in the groove 2 of waste, unusual stink is not easy to leak into the outside.The fluidised bed temperature is generally about 500～600 ℃, and waste disperses under the husky effect of flowing on one side, on one side thermolysis, the part burning of waste also promotes thermolysis.
Then, the thermolysis gas of waste is discharged from the top of vapourizing furnace 1, by means of gas delivery pipeline 6(gas delivery channels) carry to cement making equipment 200.In this thermolysis gas, swimming as small-particle as the carbon and the ash content of unburnt ingredient, be transferred with thermolysis gas.Also have, the damper of open and close type is set midway, when Litter treatment facility 100 is out of service, can close damper at the gas delivery pipeline.
-cement making equipment-
Above-mentioned suspension preheater 10 has at the above-below direction multistage swirler 11 that is provided with of left and right sides spination side by side.Swirler 11 is respectively while utilizing vortex shape gas delivery cement raw material and the high-temp waste gas that is blown into from next stage to carry out heat exchange.This exhaust flow is as described below, by rising in the decomposing furnace 20, is provided for the swirler 11 of next stage from the high-temp waste gas (being designated hereinafter simply as " kiln waste gas ") of rotary kiln 30.Kiln waste gas rises step by step by swirler as shown in phantom in FIG., arrives the swirler 11 of upper level, flows out to waste line 50 from this.
As shown in the figure, induce kiln waste gas that it is sent the jumbo induction fan 52 of usefulness toward chimney 51, in the more last side of this induction fan 52, be the upstream side of exhaust flow, get involved that gas cooler 53 and precipitron 54 being set waste line 50 setting.Induction fan 52 possesses by suspension preheater 10 and decomposing furnace 20 and is guided out large quantity of exhaust gas from rotary kiln 30, also has the function that induces thermolysis gas from above-mentioned vapourizing furnace 1 simultaneously.
On the other hand, in each swirler 11 of suspension preheater 10, after cement raw material and high temperature kiln waste gas carried out heat exchange as mentioned above, shown in solid line among the figure, landing was moved to next stage swirler 11 downwards.From the swirler 11 of upper level during in regular turn step by step by a plurality of swirler 11, cement raw material obtains abundant preheating like this, and one-level swirler 11 provides to decomposing furnace 20 above next stage.
Decomposing furnace 20 is arranged at the kiln rear portion of rotary kiln 30 at above-below direction with extending, and details is narrated below Fig. 2 and Fig. 3, flows into pyritous kiln waste gas from rotary kiln 30 to its underpart, and the while provides cement raw material from swirler 11 to it as mentioned above.And the bottom of decomposing furnace 20 provided from the thermolysis gas of above-mentioned vapourizing furnace and micro fine carbon dust etc., and provide pyritous water cooler waste gas from air quenching water cooler 40 as the air that makes its burning usefulness.
Connecting probably in the lower end of decomposing furnace 20 be the lower pipeline 21 of L font, with its with rotary kiln 30 between be connected, this lower pipeline 21 is extended the back to rotary kiln 30 1 lateral bucklings from decomposing furnace 20 lower ends downward sides, the approximate horizontal extension.Send into pyritous kiln waste gas by this lower pipeline 21 to decomposing furnace 20 lower ends, blow upward as jet flow.Utilize this kiln exhaust flow that cement raw material is upwards blowed.
When so upwards blowing by decomposing furnace 20 inner risings, cement raw material is heated to about 900 ℃, and the decarbonation reaction takes place 80%～90% of lime composition.Then by being connected in the upper pipe 22 of decomposing furnace 20 topmosts, carry to the next stage swirler of suspension preheater 10.Here, kiln waste gas separates with cement raw material, moves to upper level swirler 11, and on the other hand, cement raw material falls from the lower end of swirler 11, arrives the inlet of rotary kiln 30.
This cement burned material is subjected to the cold wind quenching in air quenching water cooler 40, form granular cement clinker.Then, after cement clinker was stored in the grog warehouse, interpolation gypsum etc. carried out the composition adjustment, is fine powder (finishing step) (diagram and detailed description are omitted) through grinding then.On the other hand, from burned material, obtain heat and be elevated to water cooler waste gas about 800 ℃, as mentioned above, offer decomposing furnace 20 as the air of burning usefulness.That is to say, reclaim used heat the combustion air in the decomposing furnace 20 is heated up, seek to improve thermo-efficiency with this.
The structure of-decomposing furnace-
Below with reference to Fig. 2 A, 2B, Fig. 3 A～3D structure, particularly can introduce the structure that thermolysis gas and combustion air use suitably and be elaborated the decomposing furnace 20 of this example.Fig. 2 A is a front view of observing the decomposing furnace 20 shown in the rotary kiln 30 from the right side, and Fig. 2 B is the right hand view from rotary kiln 30 unilateral observation decomposing furnaces.And Fig. 3 A～Fig. 3 C is respectively front view, right hand view, the left side view that amplifies the bottom of expression decomposing furnace 20, and Fig. 3 D is the vertical view that amplifies the bottom of expression decomposing furnace 20, and the part of decomposing furnace is omitted.
Shown in Fig. 2 A, 2B, decomposing furnace 20 is extend up and down cylindric, and the major part to the bottom is the side wall portion 23(tubular perisporium of roughly the same diameter from its upper end), narrower skew wall portion 24 below thereunder connecting.The upper end that connects the lower pipeline 21 that is roughly the L font in the lower end of this skew wall portion 24.As mentioned above, pyritous kiln waste gas flows into from rotary kiln 30 by lower pipeline 21 as jet flow, upwards blows from its lower end in decomposing furnace 20.
As shown in the grey arrow among Fig. 3 A, to flow into probably from the side (right side) of rotary kiln 30 be the horizontal component of the lower pipeline 21 of L font to the kiln exhaust flow of circulation in lower pipeline 21, above meanders turns to.When the mobile direction changes like this, because the effect of the power that is subjected to from the inner-wall surface of lower pipeline 21, kiln waste gas main flow direction rotary kiln 30 1 lateral deviations (the exaggeration expression is arranged among the figure) of the rising by decomposing furnace 20 bottoms.
Thereafter, slowly lean on toward the center while the major flow of kiln waste gas is crossed decomposing furnace 20 inner risings, and be subjected to the influence of the eddy flow of combustion air, becoming has the rotation composition.Such kiln exhaust flow upwards blows cement raw material on one side that coming decomposing furnace 20 upper ends flows to upper pipe 22 from this on one side, after upper pipe 22 is extended upward, to with lower pipeline 21 opposite lateral bending songs, the swirler 11(that arrives next stage is with reference to Fig. 1).
Bottom to decomposing furnace 20 provides micro fine carbon dust that acts as a fuel and the air that burns usefulness, and it is suitably interfered mutually with such kiln exhaust flow, and the appropriateness mixing heats up.That is to say, be shown in Fig. 3 A～3C as amplification, the skew wall portion 24 in decomposing furnace 20 lower ends is provided with the introducing port 25 of combustion air with respect to the horizontal plane downward-sloping state.Provide as mentioned above pyritous water cooler waste gas to this air introducing port 25 from air quenching water cooler 40.
Again, the section shape of air introducing port 25 in legend for upper base than going to the bottom long bench-type, hypotenuse tilts according to the obliquity of corresponding respectively skew wall portion 24.Following fuel feed mouth 26 of the inflow sectional area ratio of air introducing port 25 and gas introduction port 27 are big, so its flow is also bigger.The eddy flow of the combustion air that this flow is more is interfered mutually with the kiln waste gas main flow appropriateness of coming from the below.And shown in Fig. 4 B, make progress while airflow rotates, on the other hand, the kiln exhaust flow rotates while rise shown in Fig. 4 A.
Fig. 4 A, 4B are the CFD mimic diagrams, and from rotary kiln 30 unilateral observations, kiln exhaust flow and combustion-air flow in the decomposing furnace 20 are used the streamline analog representation respectively.From Fig. 4 A as can be known, form jet flow from its lower end and flow into fuel that the kiln waste gas main flows pushing in decomposing furnace 20 introduces from left side air introducing port 25 with airflow (representing) with white arrow, make its right side in figure inclined to one side, thereafter, spiral lentamente and rise with the rotation composition.
On the other hand, from Fig. 4 B as can be known, from the combustion-air flow of air introducing port 25, while the skew wall portion 24 of the lower end of decomposing furnace 20 rotate by means of below the kiln exhaust flow (shown in the grey arrow) that comes upwards push away, flow to the top.The part of combustion-air flow follows kiln exhaust flow main flow sharply to rise, and spirals on the kiln waste gas main flow direction but another part air-flow is being reeled.
Foot at the side wall portion 23 of decomposing furnace 20 is provided with fuel feed mouth 26, while so that can mix with such airflow that makes progress that spirals.The fuel that provides to this fuel feed mouth 26 is for example micro fine carbon dust, Sweet natural gas, heavy oil etc., uses under the situation of micro fine carbon dust, utilizes airflow that it is carried, and from fuel feed mouth 26 it is blown into to get final product in decomposing furnace 20.Under the situation that employing Sweet natural gas or heavy oil act as a fuel, it is got final product from 26 injections of fuel feed mouth with the pressure of stipulating.
Shown in Fig. 3 A～3C difference, two fuel feed mouths 26 extend setting in the face side and the rear side difference approximate horizontal of side wall portion 23.Again, from Fig. 3 D as can be known, two fuel feed mouths 26 are opened in the opposite lateral deviation with it of rotary kiln 30 1 sides and are be arranged in parallel.In other words, two fuel feed mouths 26 are provided with opening partially mutually on the same circumference on the tangential direction of about 180 degree phase places at its circumference, interior week are blown into fuel so that can be respectively along side wall portion 23.
And in these two fuel feed mouths 26, the introducing port 27 of thermolysis gas is set near directly over the fuel feed mouth of the face side of side wall portion 23, cement raw material input port 28 is set above it.Gas introduction port 27 will utilize thermolysis gas that gas delivery pipeline 6 transports from waste reduction and disposal equipment 100 to introduce in the decomposing furnace 20 with the state of the regulation that the following describes as mentioned above.Drop into as mentioned above from swirler 11 fallen cement raw materials from material-guiding inlet 28 again.
Shown in Fig. 3 A～3C, gas introduction port 27 interval with regulation above air introducing port 25 (for example 2～6m) is provided with, in legend, with the air introducing port 25 the same thermolysis gases that with respect to the horizontal plane import downwards.Again, from Fig. 3 D as can be known, gas introduction port 27 is arranged at the opposition side of rotary kiln 30 1 sides at the side wall portion 23 of decomposing furnace 20, points to Zhou Fangxiang, so that interior week import thermolysis gas along this surrounding wall portion 23.
The thermolysis gas that imports from this gas introduction port 27 is along the interior Zhou Liudong of the side wall portion 23 of decomposing furnace 20, shown in the black arrow of Fig. 3 B, and the rotation around the last lower axis 20a stem for stem in eddy flow (shown in the white arrow) top of combustion air.In other words, the thermolysis gas that imports from gas introduction port 27 rotational flow around the main flow of the kiln waste gas that upwards blows by the substantial middle of decomposing furnace 20 does not directly interfere with this main flow.
Again, the eddy flow that forms the combustion air of more multithread amount below the thermolysis gas cyclone suppresses the interference of thermolysis air-flow and kiln exhaust flow with this.That is to say that with reference to Fig. 4 A etc., the main flow of kiln waste gas is subjected to the opposition side of the pushing deflection air introducing port 25 of combustion-air flow in decomposing furnace 20 bottoms as mentioned above, because thermolysis gas can be guided into the opposition side of a side of kiln waste gas main flow deflection like this.
And, in this example, with reference to Fig. 3 A etc., as mentioned above, in the lower pipeline 21 of L font, deflection rotary kiln 30 1 sides when the kiln waste gas main flow of bending rises on passing through decomposing furnace 20 bottoms, and guide thermolysis gas into a side opposite with it, by means of this, can suppress the interference between thermolysis air-flow and the kiln exhaust flow.
Do like this, suppressed the mutual interference between thermolysis air-flow and the kiln exhaust flow, on the other hand, with reference to Fig. 4 B, as mentioned above, the kiln exhaust flow that the eddy flow of combustion air and below are come is interfered abundant intensification mutually, is upwards pushed away simultaneously.When the combustion-air flow that is upwards pushed away was with thermolysis air-flow thorough mixing that rotates side by side above it and rising like this, thermolysis gas can fully burn.
Make direction difference with thermolysis gas channeling decomposing furnace 20 to investigate again.For example, shown in Fig. 3 D, be benchmark with rotary kiln 30 1 sides, use angle θ
1Position and direction in the horizontal plane of expression gas introduction port 27; Shown in Fig. 3 C, use angle θ
2The angle that expression is downward-sloping with respect to the horizontal plane of gas introduction port 27.For this downward-sloping angle θ
2, because the gas delivery pipeline 6 of 30 1 sides is level basically from vapourizing furnace 1 to rotary kiln, therefore at the downward-sloping at least (θ of gas introduction port 27
2＞0) just no problem especially.But as shown in Figure 7, if θ
2Excessive, then the rotation composition of thermolysis air-flow (speed of horizontal direction) is little, so θ
2Maximum can only be an ideal below 30 degree below 40 degree also.
Also have, consider from the blended of thermolysis gas and kiln waste gas or combustion air, the flow velocity of thermolysis gas that we can say gas introduction port 27 places is high more good more, if but the flow velocity height gets up, then the pressure-losses of gas introduction port 27 becomes big, is to be about 0.3～0.5kPa under the situation of 30m/s at the flow velocity of gas for example.Therefore, constant too much in order to make in the pressure-losses of gas introduction port 27, the flow velocity of thermolysis gas is ideal below 30m/s.On the other hand, if gas flow rate is slow, then the revolving force of gas is little, too much follows the kiln exhaust flow, so gas flow rate is preferably with more than the 5m/s of kiln waste gas flow velocity par.
And, Fig. 8 be expressed as carbon monoxide in the investigation thermolysis gas in decomposing furnace 20 diffusion-condition and the Simulation result implemented.The transverse axis of Fig. 8 is represented the height of starting at from thermolysis gas input port, the longitudinal axis is represented the zero dimension standard deviation of carbon monoxide concentration, that is to say that the zero dimension standard deviation of carbon monoxide concentration is more little, the mixing that then is considered to thermolysis gas in the decomposing furnace 20 is good more.In this simulation, do not consider the burning of carbon monoxide.
As can be seen from Figure 8, near thermolysis gas input port, the zero dimension standard deviation of carbon monoxide concentration is big, the undercompounding of thermolysis gas.Make progress from thermolysis gas input port as can be known, the zero dimension standard of carbon monoxide concentration partially diminishes, and thermolysis gas and Air mixing obtain promoting.
Also have, the situation A among this figure, situation C1, situation C2, situation D1, situation D2 represent thermolysis gas is imported 5 kinds of different situations of direction of decomposing furnace 20.Specifically, conveniently making the direction in the horizontal plane of gas introduction port 27 shown in Fig. 3 D is the θ that benchmark is represented with rotary kiln 30 1 sides
13 kinds of different angles are arranged and the with respect to the horizontal plane interior downward-sloping angle θ of gas introduction port 27 shown in Fig. 3 C
22 kinds of different angles are arranged.Expression more specifically sees the following form.
| ? | Situation A | Situation C1 | Situation C2 | Situation D1 | Situation D2 |
| θ 1 | 70 degree | 95 degree | 95 degree | 135 degree | 135 degree |
| θ 2 | 20 |
20 |
25 |
20 |
25 degree |
If the curve of careful survey Fig. 8, situation A is θ as can be known
1Be 70 when spending,, compare thermolysis gas and Air mixing variation along with the height from thermolysis gas introduction port 27 uprises with situation C1, situation C2, situation D1, situation D2.Again with situation C1, situation C2, be θ
1Be 95 situation and situation D1, the situation D2 that spend, be θ
1The situation that is 135 degree is compared, and recognizes that at last thermolysis gas and the Air mixing under the situation of situation D1, situation D2 is good slightly.On the other hand, for the angle of inclination of gas introduction port 27, at θ
2Be 20 when spending and 25 do not see significant difference when spending.
In the offal treatment equipment 100 of above-described the 1st example, under the constant state of carbon and ash oontent, utilize line of pipes 6 to be sent to cement making equipment 200, be introduced into decomposing furnace 20 at thermolysis gas that vapourizing furnace 1 takes place from waste.Flow into decomposing furnace 20 from the high temperature kiln waste gas of rotary kiln 30, form jet flow and blow upward, when still importing thermolysis gas, itself and this kiln waste gas main flow is interfered, therefore this thermolysis gas and carbon are not blown off, can fully burn in decomposing furnace 20.
Particularly in this example, from the gas introduction port 27 of the bottom of the surrounding wall portion 23 that is arranged at decomposing furnace 20 thermolysis gas is introduced around kiln waste gas main flow rotatably, thereunder form the eddy flow of the combustion air of bigger flow simultaneously, if it is interfered with kiln exhaust flow from the below earlier, then can reliably suppress the generation of the situation that the kiln exhaust flow blows thermolysis gas off.
To improve the combustion air of temperature and the thermolysis gas thorough mixing of parallel rotation by means of kiln waste gas then, improve its ignition characteristic and combustionproperty, provide micro fine carbon dust such fuel from the fuel feed mouth 26 that is provided with near gas introduction port 27 then, its igniting is made its burning, and this is expected further to improve the ignition characteristic as the thermolysis gas of kindling material.
-variation-
As mentioned above, in the 1st example, with the opposition side of rotary kiln 30 1 sides on the surrounding wall portion 23 of thermolysis gas and combustion air introducing decomposing furnace 20, but be not limited thereto, the introducing port number of thermolysis gas also is not limited to one.If in offal treatment equipment 100, vapourizing furnace 1 is provided with more than two, then also can utilize each gas delivery pipeline 6 the thermolysis gas of carrying to be introduced in each decomposing furnace 20 from each vapourizing furnace 1.
For example, in Fig. 5 A～5D, express the variation that two gas introduction ports 27 are set in decomposing furnace 20.In this variation, be the number of gas introduction port 27 and the decomposing furnace 20 that the position is different from the 1st example, other are all identical.Shown in this Fig. 5 A～5C, in the decomposing furnace 20 of variation, two gas introduction ports 27 are in the same with the 1st example respectively with respect to the horizontal plane downward-sloping setting of rotary kiln 30 1 sides and its opposition side.
Again, shown in Fig. 5 D, when overlooking, two gas introduction ports 27 point to circumferential direction, week guide thermolysis gas respectively in side wall portion 23, and phase phasic difference 180 degree be arranged in parallel mutually.That is to say that two gas introduction ports 27 guide thermolysis gas to form identical eddy flow on same circumference.Like this rotation composition of rotational flow strengthening thermolysis gas is guided into simultaneously as far as possible from the position, with this further raising thermolysis burning of gas performance.
-Di 2 examples-
Below with reference to Fig. 6 the offal treatment equipment and the cement making equipment of the utility model the 2nd example are described.This figure is equivalent to Fig. 1 of above-mentioned the 1st example.Also have, in this example, the suspension preheater 10 of cement making equipment 200 and the structure of decomposing furnace 20 are different from the 1st example, but for decomposing furnace 20, except not having air introducing port 25, identical with the 1st example, therefore be marked with identical symbol 20.The member of identical formation in addition also is marked with identical symbol and omits its explanation.
And in the cement making equipment 200 of this 2nd example, suspension preheater 10 is divided into two systems, and each system possesses for example 5 grades of swirlers 11.In the system in figure left side, be blown into kiln waste gas from subordinate, except decomposing furnace 20 is not set, identical with the 1st example.On the other hand, in the system on figure right side, be provided with decomposing furnace 20, but what flow into not kiln waste gas here, but from the pyritous water cooler waste gas of air quenching water cooler 40.
Said above that (among the figure shown in the long and short dash line) blown upward as jet flow in the same decomposing furnace 20 lower ends that flow into of kiln waste gas of water cooler waste gas and the 1st example.This water cooler waste gas mixes with thermolysis gas in being introduced into decomposing furnace 20.While its burning is upwards blown cement raw material, the swirler 11 from upper pipe 22 to next stage.And rise by swirler 11 step by step, flow out to waste line 50 from the swirler 11 of upper level.
To these decomposing furnace 20 bottoms (detailed icon omission), equally with the 1st example provide cement raw material from swirler 11, again, be provided with from vapourizing furnace 1 and introduce the gas introduction port 27 of thermolysis gas, but the introducing port 25 of the air that makes its burning usefulness is not set.That is to say that because as described above, the water cooler waste gas that upwards blows by decomposing furnace 20 is different from kiln waste gas, is made of the combustion air that contains oxygen in a large number.
Except air introducing port 25 is not set, the structure of decomposing furnace 20 is identical with the 1st example, thermolysis gas is drawn towards in the decomposing furnace 20 from the gas introduction port 27 that points to the circumferential direction setting in surrounding wall portion 23, the rotation on every side along surrounding wall portion 23 internal surfaces around last lower axis 20a.That is to say, in this example, also be that thermolysis gas is introduced into decomposing furnace 20 with the form that main flow not direct and water cooler waste gas interferes.
Therefore, thermolysis gas does not skim over decomposing furnace 20 along with the main flow of water cooler waste gas, while but spirrillum is rotated slowly mixing, fully burning around the water cooler waste gas main flow of upwards blowing.By means of this burning, the temperature of water cooler waste gas rises to more than 900 ℃.By means of this, the calcining (decarbonation reaction) of the cement raw material that promotion is blown up.
Again, in the thermolysis gas that waste comes, sometimes contain dioxy (mixing) glutinous rehmannia, in order to make its decomposition, need keep the above time in about 2 seconds, the atmosphere more than 850 ℃, but in this example, temperature at the thermolysis gas of decomposing furnace 20 internal combustion kept more than 4 seconds, temperature more than 900 ℃, and dioxy (mixing) glutinous rehmannia can fully decompose.
Thereby, as described in this 2nd example, even water cooler waste gas is flowed under the such situation of decomposing furnace 20, by the thermolysis gas of vapourizing furnace 1 is introduced as the eddy flow of its rotation relatively, can can not make the fully burning in decomposing furnace 20 of thermolysis gas along with the water cooler exhaust flow is blown off yet.
-other examples-
Also have, the explanation of above-mentioned example only is an illustration, and the utility model is not intended to limit its suitable thing or its purposes.For example in above-mentioned the 1st example, the decomposing furnace 20 of cement making equipment 200 is introduced thermolysis gas, its air-flow is rotated around the main flow of kiln waste gas, thereunder import combustion air simultaneously it is rotated side by side, but be not limited to this.
That is to say that the air of burning usefulness also can be introduced in the decomposing furnace 20 above the eddy flow of thermolysis gas, also can combustion air and the neither introducing rotatably of thermolysis gas.In brief, make thermolysis gas not with decomposing furnace 20 in kiln waste gas main flow directly import with interfering and get final product, therefore kiln waste gas for example as the situation in the eddy flow inflow decomposing furnace 20 under, also can be along the rotation center introducing thermolysis gas of this eddy flow.
And the structure of the kiln (firing furnace) of the vapourizing furnace 1 of offal treatment equipment 100 and cement making equipment 200 etc. is not subjected to the restriction of above-mentioned each example yet.Vapourizing furnace 1 is not limited to the laminar that flows, and firing furnace also is not limited to rotary kiln 30, for example also can formula fluidised bed kiln.
Again, in above-mentioned each example, the Litter that provides in the vapourizing furnace 1 is envisioned for general waste from family, comprises the trade waste of plastic waste etc., but also be not limited to this, other such animals and plants fuel wastes of fecaluria, sewage sludge of wooden wastes such as thinning timber (Thinned wood), wood chip or domestic animal also can be provided vapourizing furnace 1.
Industrial applicability
If employing the utility model, the thermolysis gas of the waste that vapourizing furnace can be taken place then, keeping under institute's carbon containing and the intact situation of ash content, decomposing furnace to cement making equipment is carried, it is fully burnt, therefore can effectively utilize existing cement making equipment, with the sanitary measure of low cost realization waste, industrial application value is very high.
Claims (9)
1. offal treatment equipment, described offal treatment equipment is configured to and possesses the cement firing furnace, its burned material is carried out the adjacent setting of cement making equipment of the decomposing furnace of refrigerative clinker cooler and any one the inflow high-temp waste gas from this firing furnace and clinker cooler, it is characterized in that described offal treatment equipment possesses
Make the vapourizing furnace of waste gasification generation thermolysis gas;
To keep being transported under institute's carbon containing and the intact situation of ash content the gas delivery channels of described decomposing furnace at the thermolysis gas that described vapourizing furnace takes place; And
In described decomposing furnace, introduce the gas introduction unit of thermolysis gas from described gas delivery channels with the not direct form that interferes with the main flow that flows into the described high-temp waste gas in the described decomposing furnace of the air-flow of thermolysis gas.
2. offal treatment equipment according to claim 1 is characterized in that,
Described decomposing furnace has the tubular perisporium, and is configured to a end from its cylinder axis direction to the other end, forms the main flow from the exhaust flow of described firing furnace or clinker cooler;
Described gas introduction unit is provided with by sensing Zhou Fangxiang on described tubular perisporium, constitutes around the described gas introduction port that imports thermolysis gas on every side rotatably.
3. offal treatment equipment according to claim 2 is characterized in that,
The tubular perisporium of described decomposing furnace is configured to extend upward at upper and lower, constitutes jet flow, points upwards so that flow into the waste gas from described firing furnace or clinker cooler of its lower end;
On the other hand, described gas introduction port is configured to big and at the following angles of inclination importing thermolysis gases of 40 degree with downward-sloping ratio 0 degree with respect to the horizontal plane.
4. offal treatment equipment according to claim 3 is characterized in that, described gas introduction port is configured to import thermolysis gas with the flow velocity of 5～30m/s.
5. offal treatment equipment according to claim 2 is characterized in that,
Described offal treatment equipment is configured to make the lower end that flows into the tubular perisporium of described decomposing furnace from the waste gas of described firing furnace, on the other hand, described offal treatment equipment also possesses the air introducing port of the air of the importing burning usefulness that is arranged on this tubular perisporium bottom, to form swirling eddy on the direction identical with thermolysis gas;
Wherein, described offal treatment equipment is configured to above described air introducing port, with the interval of stipulating described gas introduction port is set.
6. offal treatment equipment according to claim 5 is characterized in that, described air introducing port is configured to introduce with the angle of inclination of downward-sloping regulation with respect to the horizontal plane the air of burning usefulness.
7. offal treatment equipment according to claim 5 is characterized in that,
The pipeline that connects the inlet that extends the described firing furnace of back L font warpage ground arrival downwards in the lower end of described decomposing furnace;
Described gas introduction port is arranged at the opposition side of described firing furnace one side in the tubular perisporium of described decomposing furnace.
8. offal treatment equipment according to claim 2 is characterized in that, the fuel feed mouth is set near the above gas introduction port of tubular perisporium of described decomposing furnace.
9. offal treatment equipment according to claim 2, it is characterized in that, offal treatment equipment possesses the described vapourizing furnace more than two, carries the gas delivery channels more than two of thermolysis gas to be communicated with the plural gas introduction port that the tubular perisporium of described decomposing furnace is provided with respectively from each vapourizing furnace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205932086U CN202030668U (en) | 2010-11-05 | 2010-11-05 | Waste treatment device for guiding pyrolytic gas of waste into cement decomposing furnace |
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| CN2010205932086U CN202030668U (en) | 2010-11-05 | 2010-11-05 | Waste treatment device for guiding pyrolytic gas of waste into cement decomposing furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466229A (en) * | 2010-11-05 | 2012-05-23 | 川崎重工业株式会社 | Waste processing equipment for introducing thermolysis gas of waste into cement decomposition furnace |
| CN102679735A (en) * | 2012-05-07 | 2012-09-19 | 中国中材国际工程股份有限公司 | Predecomposition kiln tail system outside cement kiln and process of predecomposition kiln tail system |
| CN103946924A (en) * | 2011-11-18 | 2014-07-23 | 太平洋水泥株式会社 | Method for removal of radioactive cesium and facility therefor |
-
2010
- 2010-11-05 CN CN2010205932086U patent/CN202030668U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466229A (en) * | 2010-11-05 | 2012-05-23 | 川崎重工业株式会社 | Waste processing equipment for introducing thermolysis gas of waste into cement decomposition furnace |
| CN102466229B (en) * | 2010-11-05 | 2014-04-02 | 川崎重工业株式会社 | Waste processing equipment for introducing thermolysis gas of waste into cement decomposition furnace |
| CN103946924A (en) * | 2011-11-18 | 2014-07-23 | 太平洋水泥株式会社 | Method for removal of radioactive cesium and facility therefor |
| CN103946924B (en) * | 2011-11-18 | 2016-03-16 | 太平洋水泥株式会社 | The minimizing technology of radiocesium and removal device |
| CN102679735A (en) * | 2012-05-07 | 2012-09-19 | 中国中材国际工程股份有限公司 | Predecomposition kiln tail system outside cement kiln and process of predecomposition kiln tail system |
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Granted publication date: 20111109 |