CN101155898B - Wet raw material drier and method of drying - Google Patents
Wet raw material drier and method of drying Download PDFInfo
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- CN101155898B CN101155898B CN2006800114453A CN200680011445A CN101155898B CN 101155898 B CN101155898 B CN 101155898B CN 2006800114453 A CN2006800114453 A CN 2006800114453A CN 200680011445 A CN200680011445 A CN 200680011445A CN 101155898 B CN101155898 B CN 101155898B
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- pit kiln
- raw material
- fluidised bed
- wet raw
- drying machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
- C10B43/14—Preventing incrustations
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B45/00—Other details
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
- Coke Industry (AREA)
Abstract
A wet raw material drier comprising fluidized-bed drier (8) for drying a wet raw material, gas supply piping (5) for supplying coke oven emission gas as not only a heat source but also a fluidizing gas to the fluidized-bed drier (8) and dust collector (11) for recovering dust-size particles discharged together with gas from the fluidized-bed drier (8), wherein there is provided binder adding unit (18) equipped with means capable of automatic or manual regulation so that the amount of binder added is a constant ratio to dust-size particles with respect to dust-size particles whose recovery rate by the dust collector (11) is varied in accordance with fluctuations of the drying level of wet raw material caused by fluctuations of the flow rate or temperature of supplied coke oven emission gas. A binder is added by the use of the binder adding unit (18). Thus, even if the amount of dust-size particles discharged together with gas from the fluidized-bed drier (8) and recovered is increased or decreased, any dust dispersal and carbon adhesion onto coke oven wall can be securely prevented.
Description
Technical field
The present invention relates to the wet raw materials such as coal of the pit kiln of packing into be carried out the drying installation and the drying means of exsiccant wet raw material by the fluidised bed drying machine.
Background technology
When producing coke, be purpose with the productivity that improves coke quality and raising pit kiln, before the pit kiln of packing into, loading coal is carried out drying.Pit kiln is generally before drying about 9～13% with the moisture that contains of coal, by coal drier this coal is dried to moisture 5～6%.In addition, the moisture in the general known coal reduces more, isolating micro mist amount increases more from coal.
Known all the time use fluidised bed drying machine carries out the drying of coal, for example discloses the flue gas of pit kiln is imported the method that the fluidised bed drying machine comes moisture-free coal as the thermal source fluidization gas of holding concurrently in patent documentation 1.The major part that is loaded into the coal dust of this fluidised bed drying machine is discharged from the drain tank that is communicated with fluidised bed, and is transported in the pit kiln.And because of the drying of coal dust produces micro mist, this micro mist is discharged from the exhaust outlet of fluidised bed top with exhaust, and is reclaimed by the precipitron that is arranged at the exhaust pipe arrangement.
Here, as the thermal source of the fluidised bed drying machine exhaust temperature of the pit kiln that fluidization gas uses of holding concurrently, change according to the difference of operation load state, fuel performance and the burning control situation of pit kiln.For example, under the temporary transient situation about reducing of the production of pit kiln, the situation that the high-temperature exhaust air that the temperature condition when existing than dryer design increases significantly flows into.Thus, because the moisture in the coal time is carried out drying redundantly than design, so the micro mist amount that produces from coal increases, the micro mist amount that is reclaimed by precipitron also increases.And, under the temporarily-depressed situation of the thermal value of pit kiln fuel, the situation that the cryogenic exhaust that the temperature condition when existing than dryer design reduces significantly flows into.Thus, the micro mist amount that produces from coal reduces, and the micro mist amount that is reclaimed by precipitron also reduces.So, add under the situation that gas utilizes the exhaust of pit kiln being held concurrently as the thermal source of fluidised bed drying machine flow, the temperature of gas may change.Thus, the micro mist amount that produces from coal along with the change of the degree of drying of the wet raw material in the fluidised bed drying machine also changes, and the amount of the micro mist that is reclaimed and discharged by precipitron also changes.
And each stove group (stove group) of pit kiln has the combustion gases system of 2 systems usually, just switches to another system when reach the specified time duration of service in a system.The switching of system is carried out with 15～30 minutes 1 time frequency usually.When the combustion gases system is switched, as shown in Figure 4, will be up to the present the combustion gas flow of employed system (system A) reduce gradually, if flow become 0 the combustion gas flow of the system (system B) that will next will use increase gradually.Therefore, when the switching of combustion gases system, the free air delivery of pit kiln reduces, becomes 0 and also increases once more.Along with time of the change of the switching generation gas flow of combustion gases system was generally 0.5～3 minute.
Like this, under the situation that fluidization gas that the exhaust of pit kiln is held concurrently as the thermal source of fluidised bed drying machine utilizes, when the switching of the combustion gases system of pit kiln, the free air delivery of pit kiln reduces.Therefore, in the technology of above-mentioned patent documentation 1, supply with when the deflated of pit kiln and to stop or when reducing, utilize once more from fluidised bed drying machine expellant gas and as the fluidization gas of fluidised bed drying machine, can keep the flow state of fluidised bed by circulating.But, from fluidised bed drying machine expellant gas, owing to be the gas after in the drying of coal dust, using, and because the temperature of gas is certainly well below the deflated temperature of pit kiln, so when the switching of the combustion gases system of pit kiln, as shown in Figure 4, the gas temperature that flows into the fluidised bed of fluidised bed drying machine reduces.As a result, the ridity of wet raw material reduces, because of the dry micro mist amount minimizing that produces and reclaimed by precipitron.To this, consider to be provided with in addition hot blast and produce stove etc., by making it burn to replenish insufficient heat when the switching of combustion gases system, and the micro mist amount that makes recovery is certain, but the switching of the combustion gases system of pit kiln was carried out once in common as mentioned above 15 minutes～30 minutes, and be accompanied by this switching take place gas flow change time weak point be 0.5～3 minute, so thereby it is unpractical making hot blast produce the dry required heat that furnaceman makes additional wet raw material at every turn.
On the other hand, preventing that to pack that the dust of the micro mist that the precipitron of fluidised bed coal drier of coal of pit kiln discharges disperses, adheres to the carbon of coking furnace wall into be purpose from being used for drying, considered that as patent documentation 2 micro mist to control of dust adds mink cell focus and carries out process for granulating.But, in this patent, do not consider the change of the gas flow and the gas temperature of the hot blast as the pit kiln exhaust, be, with respect to the about 250kg/hr of micro mist amount of about 95t/hr, be certain according to the addition of its illustrated mink cell focus of embodiment.
Patent documentation 1: TOHKEMY 2001-55582 communique
Patent documentation 2: Japanese Patent Publication 49-28241 communique
Summary of the invention
The problem that the present invention will solve is, supply with and to stop, reducing or to increase or this gas temperature variation even be accompanied by as hold concurrently pit kiln deflated that fluidization gas supplies to the high-temperature gas of fluidised bed drying machine of thermal source, the micro mist amount of discharging and reclaiming with gas from the fluidised bed drying machine increases and decreases, by carrying out mixing system, can prevent reliably that also dust from dispersing, the carbon to the coking furnace wall adheres to the mixed fixed-ratio of making the required binding agent of grain of micro mist.
In order to address the above problem, the present invention is a kind of drying installation of wet raw material, has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; Precipitron is used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, wherein, has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, and is the mechanism of certain ratio with respect to the micro mist amount so that make content of binder.
And, the invention is characterized in that be provided with the content of binder control device, this content of binder control device detects from the change of the deflated feed rate of pit kiln or the change of exhaust temperature, and adjusts content of binder according to this detection signal.
And, the invention is characterized in that be provided with the content of binder control device, this content of binder control device detects the increase and decrease of pit kiln turnout, and adjust content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
And, the invention is characterized in that be provided with the content of binder control device, this content of binder control device detects the increase and decrease of the thermal value of pit kiln fuel, and adjust content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
And, the invention is characterized in that be provided with the content of binder control device, this content of binder control device detects the pit kiln deflated and supplies with the situation that stops or reducing, and adjusts content of binder according to this detection signal.
And, the invention is characterized in that also be provided with: the gas circulation pipe arrangement is used for and will circulates once more from above-mentioned fluidised bed drying machine expellant gas and supply to above-mentioned fluidised bed drying machine; The gas-circulating system control device is controlled, thereby so that will reuse from the fluidization gas of above-mentioned fluidised bed drying machine expellant gas circulation as above-mentioned fluidised bed drying machine when the deflated supply from pit kiln stops or reducing.
And, the invention is characterized in, according to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
And, the invention is characterized in, according to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
And, the invention is characterized in, according to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
And, the invention is characterized in that precognition signal that switches according to the firing system of pit kiln or commencing signal are supplied with the situation that stops or reducing to the deflated of pit kiln and detected.
In addition, the present invention is a kind of drying means of wet raw material, is used for the drying installation of wet raw material, and the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses the change according to the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow, adjusting content of binder, to make it be the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material, detection is from the change of the deflated feed rate of pit kiln or the change of deflated temperature, and adjusts content of binder according to this detection signal.
In addition, the present invention is a kind of drying means of wet raw material, is used for the drying installation of wet raw material, and the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, so that making content of binder is the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material, detect the increase and decrease of pit kiln turnout, and adjust content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
In addition, the present invention is a kind of drying means of wet raw material, is used for the drying installation of wet raw material, and the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, so that making content of binder is the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material, detect the increase and decrease of the thermal value of pit kiln fuel, and adjust content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
And, the invention is characterized in, according to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
And, the invention is characterized in, according to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
And, the invention is characterized in, according to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
In addition, the present invention is a kind of drying means of wet raw material, is used for the drying installation of wet raw material, and the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, so that making content of binder is the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material, detection is supplied with the situation that stops or reducing from the deflated of pit kiln, and adjusts content of binder according to this detection signal.
And, the invention is characterized in, when the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
And, the invention is characterized in, when the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
And, the invention is characterized in, when the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
And, the invention is characterized in, when the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
And, the invention is characterized in that precognition signal that switches according to the firing system of pit kiln or commencing signal are supplied with the situation that stops or reducing to the deflated of pit kiln and detected.
According to the present invention, even supply to the pit kiln deflated supply of the high-temperature gas of fluidised bed drying machine stops along with the fluidization gas of holding concurrently as thermal source, reduce or increase, perhaps pit kiln exhaust gas temperature change, change has taken place in the micro mist amount of discharging and reclaiming with gas from the fluidised bed drying machine, because detecting or predict the supply of pit kiln deflated stops, reduce or increase, perhaps pit kiln exhaust gas temperature change, and on the basis of precognition, adjust content of binder by the increase of the micro mist amount of precipitron recovery, therefore, can always the mixture ratio between micro mist and the binding agent be maintained best ratio.Therefore, can prevent that dust from dispersing or the carbon to the coking furnace wall adheres to by the binding agent that adds q.s to micro mist, and can eliminate the pollution of the too much transport path of binding agent and the problems such as waste of binding agent.
Description of drawings
Fig. 1 is the summary pie graph of an embodiment of expression drying installation of the present invention.
Fig. 2 is other the summary pie graph of embodiment of expression drying installation of the present invention.
Fig. 3 is the figure of the switching condition of expression pit kiln burning and gas-exhausting of the present invention system.
Fig. 4 is the figure of switching condition of the pit kiln burning and gas-exhausting system of expression prior art.
Embodiment
Below, according to the present invention being applicable to the exsiccant embodiment of pit kiln, embodiments of the present invention are described with coal dust (being designated hereinafter simply as " coal dust ").
Fig. 1 is the summary pie graph of an embodiment of expression drying installation of the present invention.In the figure, the burning and gas-exhausting of the pit kiln that produces in the pit kiln 1 is emitted to atmosphere from pit kiln chimney 3 by flue 2.The temperature of the flue gas (pit kiln exhaust) 4 by flue 2 is about 150～250 ℃.The flue 2 ramose gas supplying tubing 5 from pit kiln are flow through in pit kiln exhaust 4, and boost the back as the thermal source underfeed of fluidization gas 7 from fluidised bed drying machine 8 of holding concurrently by gas blower 6.
The exhaust 9 of discharging from fluidised bed drying machine 8 is released to the atmosphere via precipitron 11, gas blower 12 and from chimney 13 by exhaust pipe arrangement 10.
And, branch out gas circulation pipe arrangement 14 from exhaust pipe arrangement 10, by its front end is connected with gas supplying tubing 5, thereby exhaust 9 that can circular flow drying machine 8 is used as the fluidization gas of fluidised bed drying machine 8 once more.
Coal dust as wet raw material is encased in the fluidised bed drying machine 8 by the groove 15 of packing into, and forms fluidised bed 16 by the upwelling of the fluidization gas 7 of holding concurrently from the above-mentioned thermal source of fluidised bed drying machine 8 bottoms importing.Carry out the drying of coal dust in this fluidised bed 16, coal dust is adjusted to the temperature and the water ratio of regulation, and it is most of by drain tank 17 discharges.The coal dust of discharging from drain tank 17 is transported to the pit kiln by not shown transport path.On the other hand, because of the drying of the coal dust in the fluidised bed 16 produces micro mist, this micro mist is discharged from gas from the top of fluidised bed drying machine 8, and is reclaimed by the precipitron 11 that is arranged on the exhaust pipe arrangement 10.
In the micro mist that is reclaimed, add heavy wet goods binding agent by binding agent adding set 18, and be transported in the pit kiln by not shown transport path by a mixed back of making at mixed system tablets press 19.The addition of the binding agent of binding agent adding set 18 adds control device 20 by binding agent and adjusts.Certainly, binding agent interpolation control device 20 also can be built in the binding agent adding set 18.In addition, under the situation of the adjustment of manually carrying out binding agent adding set 18, do not need binding agent to add control device 20.
Be provided with exhaust flow-meter 21 in the flue 2 of above-mentioned pit kiln, gas supplying tubing 5 is provided with under meter 23 and the 1st variable valve 24, and exhaust pipe arrangement 10 is provided with the 2nd variable valve 25, and the 3rd variable valve 26 is set on gas circulation pipe arrangement 14.Exhaust flow-meter 21 is optional, can calculate by the burning of pit kiln and infer extraction flow.The the 1st～the 3rd variable valve 24～26 can carry out the adjusting of aperture or flow by variable valve control device 27～29 respectively.
In the present embodiment, along with the exhaust temperature of pit kiln or the variation of flow,, make by the micro mist of precipitron 11 recovery and the mixture ratio of binding agent and be always best ratio by adjusting binding agent adding set 18.It is as follows to carry out specific description with reference to Fig. 1.
Under steady state,,, do not need the mechanism that binding agent adding set 18 is adjusted so the addition of binding agent is necessarily because the amount of the micro mist of discharging from precipitron 11 be certain.The result that the inventor conscientiously studies the optimum mixture ratio rate of micro mist and binding agent shows, its best ratio is for respect to micro mist 1 binding agent being 0.1～15% scope.
On the other hand, since in pit kiln the some reasons such as change of the thermal value of cataclysm, the pit kiln fuel of turnout, the flow or the temperature that import to the pit kiln exhaust 4 of fluidised bed drying machine 8 have taken place under the situation of variation, according to above-mentioned reason, the micro mist amount that is reclaimed by precipitron 11 also changes.In the micro mist that is reclaimed, add to mix make the required binding agent of grain as mentioned above, but when variation has taken place the exhaust character of pit kiln, when adding with steady running during the binding agent of same amount, it is too much or binding agent is not enough that binding agent will take place.To this, in the present invention, by grasping the micro mist amount that changes along with this pit kiln deflated flow or variation of temperature in advance by precipitron 11 recovery, and manually or automatically adjust binding agent adding set 18 corresponding to pit kiln deflated flow or variation of temperature, the micro mist amount that can discharge from precipitron 11 and the mixture ratio of binding agent remain necessarily.Thus, can prevent in the problem such as pollution of the transport path that too much causes by binding agent and the transport path that the binding agent deficiency causes play dirt or the carbon in pit kiln adheres to.
Inflation method as above-mentioned binding agent adding set 18, can detect or predict that thereby pit kiln deflated change of properties manually carries out, but also can automatically carry out the adjustment of content of binder by add the signal (signal of the thermal value increase and decrease of the signal of the increase and decrease of expression pit kiln turnout, expression pit kiln fuel etc.) that control device 20 detects the situation of the pit kiln deflated change of properties that sends from pit kiln by illustrated binding agent.
Fig. 2 is the summary pie graph of another embodiment of expression drying installation of the present invention.In the figure, the burning and gas-exhausting of the pit kiln that produces in pit kiln 1 is emitted to atmosphere from pit kiln chimney 3 by flue 2.The temperature of the flue gas 4 by flue 2 is about 150～250 ℃.The flue 2 ramose gas supplying tubing 5 from pit kiln are flow through in pit kiln exhaust 4, and boost the back as the thermal source underfeed of fluidization gas 7 from fluidised bed drying machine 8 of holding concurrently by gas blower 6.
The exhaust 9 of discharging from fluidised bed drying machine 8, is released to the atmosphere from chimney 13 via precipitron 11, gas blower 12 by exhaust pipe arrangement 10.
And, branch out gas circulation pipe arrangement 14 from exhaust pipe arrangement 10, by its front end is connected with gas supplying tubing 5, thereby exhaust 9 that can circular flow drying machine 8 is used as the fluidization gas of fluidised bed drying machine 8 once more.
Coal dust as wet raw material is encased in the fluidised bed drying machine 8 by the groove 15 of packing into, and forms fluidised bed 16 by the upwelling of the fluidization gas 7 of holding concurrently from the above-mentioned thermal source of fluidised bed drying machine 8 bottoms importing.Carry out the drying of coal dust in this fluidised bed 16, coal dust is adjusted to the temperature and the water ratio of regulation, and it is most of by drain tank 17 discharges.The coal dust of discharging from drain tank 17 is transported to the pit kiln by not shown transport path.On the other hand, because of the drying of the coal dust in the fluidised bed 16 produces micro mist, this micro mist is discharged from gas from the top of fluidised bed drying machine 8, and is reclaimed by the precipitron 11 that is arranged on the exhaust pipe arrangement 10.
In the micro mist that is reclaimed, add heavy wet goods binding agent by binding agent adding set 18, and be transported in the pit kiln by not shown transport path by a mixed back of making at mixed system tablets press 19.The addition of the binding agent of binding agent adding set 18 adds control device 20 by binding agent and adjusts.Certainly, binding agent interpolation control device 20 also can be built in the binding agent adding set 18.
Be provided with exhaust flow-meter 21 in the flue 2 of above-mentioned pit kiln, gas supplying tubing 5 is provided with under meter 23 and the 1st variable valve 24, and exhaust pipe arrangement 10 is provided with the 2nd variable valve 25, and gas circulation pipe arrangement 14 is provided with the 3rd variable valve 26.Exhaust flow-meter 21 is optional, can calculate by the burning of pit kiln and infer extraction flow.The the 1st～the 3rd variable valve 24～26 can carry out the adjusting of aperture or flow by variable valve control device 27～29 respectively.And, gas-circulating system control device 30 is set, carry out the control of the circulation gas scale of construction by each control device 27～29 of steering order being given the 1st～the 3rd variable valve 24～26.
Pit kiln 1 as before background technology part also is illustrated, each stove group has the combustion gases system of 2 systems usually, switches to another system when reach the specified time duration of service a system.The switching of system is carried out with 15 minutes～30 minutes 1 time frequency usually.
When the combustion gases system is switched, as shown in Figure 4, the combustion gas flow of the system (system A) that up to the present uses is reduced gradually, if flow become 0 the combustion gas flow of the system (system B) that will next use increase gradually.Therefore, when switching in the combustion gases system, the free air delivery of pit kiln reduces and increases once more.The required time of the switching of combustion gases system was generally 0.5～3 minute.
In the present embodiment, supply with at the deflated of pit kiln and stop or when reducing, will circulate via gas circulation pipe arrangement 14 ground from the exhaust of fluidised bed drying machine 8 discharges, and reuse as the fluidization gas of fluidised bed drying machine 8.Be specifically described as follows with reference to Fig. 2 and Fig. 3.
The 3rd variable valve 26 that is disposed on the gas circulation pipe arrangement 14 is full cut-off or crack when steady running.Promptly, when steady running under the situation of the excessive discharge temperature of pit kiln, thereby gas temperature is reduced is effectively to the recycle gas of mixing low temp a little, and, use recycle gas in the drying power adjustment in the time of also can change having taken place at the moisture of the coal dust of supplying with.
When beginning is switched in the combustion gases system of pit kiln, make the 3rd variable valve 26 open to certain aperture from full cut-off or crack state.As a result, by the work of gas blower 6 and gas blower 12, recycle gas 31 flows through gas circulation pipe arrangement 14 and produces cycling stream.Being guaranteed to certain moment at the flow of recycle gas 31 reduces the aperture of the 1st variable valve 24 gradually.As a result, the pit kiln exhaust 4 that supplies to fluidised bed drying machine 8 before this reduces gradually, and the flow to pit kiln chimney 3 increases on the contrary.Because the on-off action speed of the 1st variable valve 24 needn't be for necessarily, and the burning and gas-exhausting amount is according to the state of combustion change of the working level and the pit kiln 1 of pit kiln 1, so need individually determine according to the actual working state of pit kiln 1.
The control of the 1st～the 3rd variable valve 24～26 is according to the instruction from gas-circulating system control device 30, and undertaken by each variable valve control device 27～29 each variable valve of control.Certainly, also part or all of gas-circulating system control device 30 and each variable valve control device 27～29 can be incorporated in the control machine.And each variable valve control device also can be built in separately the variable valve.
When the combustion gases system of pit kiln is switched, the beginning of the control that the supply gas of subtend fluidised bed drying machine 8 changes, thereby thereby can use from pit kiln 1 receive the method for the commencing signal beginning that the combustion gases system switches, according to the method for the fluctuations in discharge beginning of the exhaust flow-meter 21 of flue 2 etc.
In addition, as shown in Figure 3, also can before the certain hour that the gas system that takes fire switches, receive the precognition signal, and begin to control to the supply gas change of fluidised bed drying machine 8 according to this precognition signal from pit kiln 1.For example, before extraction flow becomes 01 minute, receive the precognition signal, and beginning is via the gas circulation of gas circulation pipe arrangement 14.Thus, can avoid gas circulation untimely, to the insufficient situation of supply gas amount (thermal source subtracts the fluidization gas volume) of fluidised bed drying machine 8.
The recycle gas 31 that uses when the combustion gases system of pit kiln is switched is the gas after using in the drying of the coal dust of fluidised bed drying machine 8, so gas temperature is lower than pit kiln exhaust 4 certainly.Therefore, when the switching of the combustion gases system of pit kiln, as shown in Figure 3, the gas temperature that flows into the fluidised bed of fluidised bed drying machine reduces.As a result, the ridity of wet raw material reduces, and the amount of the micro mist that is reclaimed by precipitron that produces by drying reduces.
In the micro mist that is reclaimed, add to mix make the required binding agent of grain as mentioned above, but when the micro mist amount reduces when the switching of the combustion gases system of pit kiln, when adding, during the binding agent of same amount, can cause binding agent too much with steady running.To this, in the present invention, the switching of the combustion gases system by detecting pit kiln, and on the basis of the minimizing of prediction micro mist amount reduces content of binder (with reference to the hypomere of Fig. 3).The detection of the switching of combustion gases system as shown in Figure 3, is undertaken by receiving the precognition signal from pit kiln before the certain hour that switches at the gas system that takes fire.When binding agent adds control device 20 and receives this precognition signal, predict the situation that the micro mist amount reduces second every t, and reduce the content of binder of binding agent adding set 18 so that the ratio of micro mist and binding agent is identical when becoming with steady running.Thus, can always make micro mist and binding agent is that fixed-ratio mixes, and the problems such as pollution of the transport path that binding agent too much causes can't take place.
The detection of the switching of combustion gases system also can be undertaken by the commencing signal that receives the switching of combustion gases system from pit kiln 1.At this moment, compare with the detection of precognition signal, the time till the adjustment of beginning content of binder shortens, can be fully corresponding in actual job.
Industrial applicability
The present invention's be not only applicable to pack into drying of coal dust of coke oven also goes for other the drying of wet raw material such as water granulated slag and lime stone.
Claims (22)
1. the drying installation of a wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; Precipitron is used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, wherein,
Has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, and is the mechanism of certain ratio with respect to the micro mist amount so that make content of binder.
2. the drying installation of wet raw material as claimed in claim 1 is characterized in that,
Be provided with the content of binder control device, this content of binder control device detects from the change of the deflated feed rate of pit kiln or the change of exhaust temperature, and adjusts content of binder according to this detection signal.
3. the drying installation of wet raw material as claimed in claim 1 is characterized in that,
Be provided with the content of binder control device, this content of binder control device detects the increase and decrease of pit kiln turnout, and adjusts content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
4. the drying installation of wet raw material as claimed in claim 1 is characterized in that,
Be provided with the content of binder control device, this content of binder control device detects the increase and decrease of the thermal value of pit kiln fuel, and adjusts content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
5. the drying installation of wet raw material as claimed in claim 1 is characterized in that,
Be provided with the content of binder control device, this content of binder control device detects the pit kiln deflated and supplies with the situation that stops or reducing, and adjusts content of binder according to this detection signal.
6. the drying installation of wet raw material as claimed in claim 1 is characterized in that,
Also be provided with: the gas circulation pipe arrangement is used for and will circulates once more from above-mentioned fluidised bed drying machine expellant gas and supply to above-mentioned fluidised bed drying machine; The gas-circulating system control device is controlled, thereby so that will reuse from the fluidization gas of above-mentioned fluidised bed drying machine expellant gas circulation as above-mentioned fluidised bed drying machine when the deflated supply from pit kiln stops or reducing.
7. the drying installation of wet raw material as claimed in claim 2 is characterized in that,
According to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
8. the drying installation of wet raw material as claimed in claim 3 is characterized in that,
According to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
9. the drying installation of wet raw material as claimed in claim 4 is characterized in that,
According to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
10. the drying installation of wet raw material as claimed in claim 5 is characterized in that,
Precognition signal that switches according to the firing system of pit kiln or commencing signal are supplied with the situation that stops or reducing to the deflated of pit kiln and are detected.
11. the drying means of a wet raw material is used for the drying installation of wet raw material, the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, so that making content of binder make it is the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material
Detection is from the change of the deflated feed rate of pit kiln or the change of deflated temperature, and adjusts content of binder according to this detection signal.
12. the drying means of a wet raw material is used for the drying installation of wet raw material, the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, so that making content of binder is the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material
Detect the increase and decrease of pit kiln turnout, and adjust content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
13. the drying means of a wet raw material is used for the drying installation of wet raw material, the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, so that making content of binder is the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material
Detect the increase and decrease of the thermal value of pit kiln fuel, and adjust content of binder according to the variation of the exhaust temperature of following this increase and decrease and flow.
14. the drying means of wet raw material as claimed in claim 11 is characterized in that,
According to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
15. the drying means of wet raw material as claimed in claim 12 is characterized in that,
According to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
16. the drying means of wet raw material as claimed in claim 13 is characterized in that,
According to the signal that sends from pit kiln the situation that the deflated feed rate from pit kiln reduces or increases or exhaust temperature changes is detected.
17. the drying means of a wet raw material is used for the drying installation of wet raw material, the drying installation of this wet raw material has: fluidised bed drying machine, dry wet raw material; Conduit and gas blower import above-mentioned fluidised bed drying machine with the exhaust of pit kiln; And precipitron, be used for reclaiming the micro mist of following in the exhaust of above-mentioned fluidised bed drying machine; And the exhaust that utilizes pit kiln is as the thermal source of the above-mentioned fluidised bed drying machine fluidization gas of holding concurrently, also has the binding agent adding set, this binding agent adding set possesses according to the change of the micro mist amount of discharging from above-mentioned precipitron of the variation of following the deflated temperature of pit kiln or flow to be adjusted, so that making content of binder is the mechanism of certain ratio with respect to the micro mist amount, in the drying means of this wet raw material
Detection is supplied with the situation that stops or reducing from the deflated of pit kiln, and adjusts content of binder according to this detection signal.
18. the drying means of wet raw material as claimed in claim 11 is characterized in that,
When the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
19. the drying means of wet raw material as claimed in claim 12 is characterized in that,
When the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
20. the drying means of wet raw material as claimed in claim 13 is characterized in that,
When the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
21. the drying means of wet raw material as claimed in claim 17 is characterized in that,
When the deflated supply from pit kiln stops or reducing, thereby will reuse from the fluidization gas of fluidised bed drying machine expellant gas circulation as the fluidised bed drying machine.
22. the drying means of wet raw material as claimed in claim 17 is characterized in that,
Precognition signal that switches according to the firing system of pit kiln or commencing signal are supplied with the situation that stops or reducing to the deflated of pit kiln and are detected.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP112596/2005 | 2005-04-08 | ||
| JP2005112596A JP4787528B2 (en) | 2005-04-08 | 2005-04-08 | Wet raw material drying apparatus and drying method |
| PCT/JP2006/307135 WO2006109629A1 (en) | 2005-04-08 | 2006-04-04 | Wet raw material drier and method of drying |
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| Publication Number | Publication Date |
|---|---|
| CN101155898A CN101155898A (en) | 2008-04-02 |
| CN101155898B true CN101155898B (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006800114453A Active CN101155898B (en) | 2005-04-08 | 2006-04-04 | Wet raw material drier and method of drying |
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|---|---|
| JP (1) | JP4787528B2 (en) |
| KR (1) | KR100972707B1 (en) |
| CN (1) | CN101155898B (en) |
| BR (1) | BRPI0608619A2 (en) |
| RU (1) | RU2373256C2 (en) |
| TW (1) | TW200643161A (en) |
| UA (1) | UA83979C2 (en) |
| WO (1) | WO2006109629A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101116832B1 (en) * | 2010-06-30 | 2012-02-29 | 한국전력공사 | Apparatus for drying coal and system for upgrading coal quality including the same |
| JP5683380B2 (en) * | 2011-05-20 | 2015-03-11 | 三菱重工業株式会社 | Fluidized bed dryer |
| CN102730252B (en) * | 2012-06-11 | 2014-07-30 | 张家港市新盛新材料有限公司 | Drying and packaging device of polyphenylene sulfide |
| CN103663592A (en) * | 2012-09-13 | 2014-03-26 | 中国辐射防护研究院 | High-salt-content inorganic wastewater fluidization treatment technique and system |
| JP5410633B1 (en) * | 2013-06-13 | 2014-02-05 | 新日鉄住金エンジニアリング株式会社 | Drying apparatus and drying method using the drying apparatus |
| CN110352091B (en) * | 2017-02-20 | 2022-06-17 | 努斯有限责任公司 | Fluidized bed system |
| CN110436464B (en) * | 2019-06-14 | 2023-06-16 | 阳城县绿色科技研发中心 | Semi-automatic coke baking device for producing carbon disulfide by coke method |
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| CN1048170A (en) * | 1989-06-20 | 1991-01-02 | 中国科学院化工冶金研究所 | Powder fast fluidization dry thermal cracking or granulation |
| CN1104236A (en) * | 1994-07-17 | 1995-06-28 | 邯郸市煤炭经济技术开发公司 | Shaped coal and its production method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120690A (en) * | 1982-01-13 | 1983-07-18 | Nippon Steel Chem Co Ltd | Preparation of coke |
| JP3825587B2 (en) * | 1999-08-18 | 2006-09-27 | 新日本製鐵株式会社 | Coal drying method and drying apparatus |
| JP2006232938A (en) * | 2005-02-23 | 2006-09-07 | Nippon Steel Corp | Apparatus for drying wet raw material |
-
2005
- 2005-04-08 JP JP2005112596A patent/JP4787528B2/en not_active Expired - Fee Related
-
2006
- 2006-04-04 BR BRPI0608619-5A patent/BRPI0608619A2/en not_active IP Right Cessation
- 2006-04-04 RU RU2007141399/15A patent/RU2373256C2/en not_active IP Right Cessation
- 2006-04-04 WO PCT/JP2006/307135 patent/WO2006109629A1/en active Application Filing
- 2006-04-04 CN CN2006800114453A patent/CN101155898B/en active Active
- 2006-04-04 UA UAA200712399A patent/UA83979C2/en unknown
- 2006-04-04 KR KR1020077025796A patent/KR100972707B1/en active IP Right Grant
- 2006-04-07 TW TW095112441A patent/TW200643161A/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048170A (en) * | 1989-06-20 | 1991-01-02 | 中国科学院化工冶金研究所 | Powder fast fluidization dry thermal cracking or granulation |
| CN1104236A (en) * | 1994-07-17 | 1995-06-28 | 邯郸市煤炭经济技术开发公司 | Shaped coal and its production method |
Non-Patent Citations (1)
| Title |
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| JP特开昭49-28241A 1974.03.13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006291010A (en) | 2006-10-26 |
| WO2006109629A1 (en) | 2006-10-19 |
| RU2373256C2 (en) | 2009-11-20 |
| BRPI0608619A2 (en) | 2010-01-19 |
| JP4787528B2 (en) | 2011-10-05 |
| TW200643161A (en) | 2006-12-16 |
| TWI313295B (en) | 2009-08-11 |
| UA83979C2 (en) | 2008-08-26 |
| RU2007141399A (en) | 2009-05-20 |
| KR100972707B1 (en) | 2010-07-27 |
| KR20070120578A (en) | 2007-12-24 |
| CN101155898A (en) | 2008-04-02 |
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