CN203489582U - Brown coal drying system - Google Patents
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- CN203489582U CN203489582U CN201320268874.6U CN201320268874U CN203489582U CN 203489582 U CN203489582 U CN 203489582U CN 201320268874 U CN201320268874 U CN 201320268874U CN 203489582 U CN203489582 U CN 203489582U
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Abstract
The utility model discloses a brown coal drying method and a brown coal drying system. The brown coal drying method comprises the steps as follows: S1, brown coal is put in a raw material tower; S2, the gas in the raw material tower is extracted to a drying tower to reduce the pressure in the raw material tower, and the gas in the drying tower is dried; S3, the dried gas obtained in S2 is piped in the raw material tower again; and S4, the steps S2 and S3 are repeated until obtaining dried brown coal. According to the brown coal drying method, the gas in the raw material tower is pumped to the drying tower, the pressure in the raw material tower is reduced, thereby moisture in the brown coal is rapidly evaporated under low temperature, energy consumption is reduced, the drying rate is raised, and spontaneous combustion or blast caused by local high temperature of brown coal is prevented. In addition, the whole system runs under low pressure, and airborne dust generated when gas flows through the raw material tower is reduced.
Description
Technical field
The utility model relates to industrial technology field, especially relates to a kind of brown coal drying system.
Background technology
Brown coal belong to the coal that degree of coalification is lower, and its reserves account for the current coal of China and always find out the more than 13% of reserves.The feature of brown coal is that moisture is high, porosity is large, and volatile matter is high, calorific value is low.China's brown coal are generally containing the about 20-50% of full water, and some country, as moisture in Australian brown coal reaching more than 70%.The high brown coal of a large amount of exploitation moisture are directly used in burning, and not only boiler combustion is unstable, and efficiency is low.Because the process of moisture evaporation can be taken away a large amount of heat energy, make combustion exhaust gas heat loss large, the generating thermal efficiency is low.In addition, high moisture content can only be used in locality brown coal, can not long-distance transportation, greatly limited the exploitation scale of coal.Therefore, the water brown coal drying technology that is rich in that exploitation is advanced, significant for the deep processing and utilization of brown coal.
Brown coal are a kind of porous masses, and micropore is flourishing, and wherein moisture is the inherent water in pore or the combination water state by Hydrogenbond exists with organic oxygen mostly, moisture remove comparatively difficulty.For evaporative drying process, one of key issue is that energy consumption is high.According to measuring and calculating, the energy that needs consumption can reach 25% processing coal carrys out transpiring moisture, so its carbon dioxide that obtains unit energy discharge is more.
Traditional brown coal drying technology, a kind of technology is to using flue gas as drying medium, directly contacts with brown coal, makes moisture in coal evaporation drying.Another kind of technology is to using low-pressure saturated steam as heat medium (Herman H.Brown coal[M] .SECV, Melbourne, 1952), adopts the moisture in contact drying principle (coal flows in pipe, and steam conducts heat by tube wall) removal brown coal.
For the first technology, because brown coal volatile matter is high, ignition temperature is low, easily produces superheating phenomenon, makes ature of coal variation, controls badly, also spontaneous combustion or blast can occur.The method of the lower hot blast temperature of taking for prevent exploding, exists that dry tenacity is low, speed is slow, is not suitable for the problems such as demand of industrial production.
For the second technology, although this technology has safety, feature that reliability is high, yet, this technology be still by evaporation by moisture removal, so energy consumption is higher, exhaust emissions amount is large.
Utility model content
The utility model is intended at least solve one of technical problem existing in prior art.For this reason, an object of the present utility model is to propose a kind of brown coal drying system of efficiently removing the moisture in brown coal under cryogenic conditions.
Brown coal drying system according to the utility model embodiment, comprising: raw material tower, in described raw material tower, limit spatial accommodation to hold brown coal, and on described raw material tower, there is charging aperture and discharging opening; At least one drying tower, described at least one, drying tower communicates with described raw material tower by air inlet pipeline and outlet pipe respectively, places drier in described drying tower; And vavuum pump, described vavuum pump is located on described air inlet pipeline.
According to the brown coal drying system of the utility model embodiment, by vavuum pump is set, can be by the pressure decreased in raw material tower, thereby the moisture in brown coal is rapid evaporation at a lower temperature, be conducive to reduce energy consumption and improve rate of drying, and because baking temperature is low, avoided brown coal because of localized hyperthermia, to cause the generation of the accidents such as spontaneous combustion or blast.In brown coal drying process, brown coal and drier directly contact, and both all remain static, and brown coal change of granularity is little, thereby has increased the selectable range of drier.In addition, this system is simple in structure, easy to maintenance.
According to an embodiment of the present utility model, on described drying tower, be respectively equipped with intake channel and exhaust channel, wherein said intake channel is used for passing into high temperature drying gas, and described exhaust channel is taken away described drier moisture and carried out the gas after heat exchange with described drier for discharging.Thus, can realize desiccant regeneration, and after high temperature drying gas and drier heat exchange, make drier there is certain temperature, then in this drier and raw material tower, the gas with steam carries out heat exchange, make the gas that will enter in raw material tower there is uniform temperature, thereby can be used as the origin of heat that brown coal heat up.
Alternatively, described high temperature drying gas is temperature at air or the nitrogen of 110 ℃～300 ℃.
According to an embodiment of the present utility model, the two ends of described air inlet pipeline are located at respectively the top of described drying tower and described raw material tower, and the two ends of described outlet pipe are located at respectively the bottom of described drying tower and described raw material tower.
Further, the top of described raw material tower is provided with deduster.Thus, by deduster is set, can effectively remove the dust in raw material tower, be conducive to the stable operation of vavuum pump.
Alternatively, described drying tower is two.Thus, can effectively improve the drying efficiency of brown coal.
According to an embodiment of the present utility model, the pressure that described vavuum pump is controlled in described raw material tower is 0.001～0.08MPa.
Alternatively, the temperature of the brown coal in described raw material tower is 50～150 ℃.
Alternatively, described drier is molecular sieve, silica gel, anhydrous calcium chloride, anhydrous magnesium sulfate or dead plaster.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is according to the schematic diagram of the brown coal drying process of an embodiment of the utility model;
Fig. 2 is according to the schematic diagram of the brown coal drying system of an embodiment of the utility model.
The specific embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In description of the present utility model, except as otherwise noted, the implication of " a plurality of " is two or more.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
Below with reference to Fig. 1-Fig. 2, describe according to the brown coal drying process of the utility model embodiment, this brown coal drying process can be used for drying brown coal.
As shown in Figure 1, the brown coal drying process according to the utility model first aspect embodiment, comprises the following steps:
S1, brown coal are put into raw material tower 1;
S2, the gas in raw material tower 1 is evacuated in drying tower 2 so that the pressure decreased in raw material tower, wherein 2 pairs of gases of drying tower are dried processing;
S3, the gas after dry processing in step S2 is passed in raw material tower 1 again; And
S4, repeating step S2 and S3 are until obtain dry brown coal.
That is to say, first brown coal are put into raw material tower 1, reduce the pressure in raw material tower 1, under low pressure, the driving force that aqueous water becomes water vapour increases, evaporating required temperature reduces, moisture in the interior brown coal of raw material tower 1 can be deviate from lower temperature, then the gas that carries steam enters into drying tower 2 from raw material tower 1,2 pairs of these gases of drying tower are dried the gas of processing to obtain being comparatively dried, and dried gas passes in raw material tower 1 again, carry out next one circulation, so move in circles, until obtain dry brown coal.Alternatively, the gas after dry processing is being passed in the process in raw material tower 1 again, the temperature of the brown coal in raw material tower 1 can be 50～150 ℃.Here, it should be noted that, can adopt low-temperature airflow to heat brown coal, or directly brown coal are carried out to low-temperature heat so that the moisture in brown coal is deviate from.
According to the brown coal drying process of the utility model embodiment, by the gas in raw material tower 1 is evacuated in drying tower 2, can be by the pressure decreased in raw material tower 1, thereby the moisture in brown coal is rapid evaporation at a lower temperature, be conducive to reduce energy consumption and improve rate of drying, meanwhile, because baking temperature is low, avoided brown coal because of localized hyperthermia, to cause the generation of the accidents such as spontaneous combustion or blast.In addition, because whole system is moved under lower pressure, reduced the airborne dust producing when air-flow passes through raw material tower 1.
In an embodiment of the present utility model, in step S2, the gas in raw material tower 1 is evacuated in drying tower 2 and realizes by vavuum pump 3.By vavuum pump 3 is set, can reduce the pressure in raw material tower 1, under low pressure, the driving force that aqueous water becomes water vapour increases, and evaporates required temperature and reduces, and the moisture in brown coal can be deviate from lower temperature.Alternatively, the pressure that vavuum pump 3 is controlled in raw material tower 1 is 0.001～0.08MPa.
In an optional embodiment of the present utility model, in drying tower 2, be placed with drier, before step S4, also comprise: S31, the drier in drying tower 2 is dried to regeneration.Here, it should be noted that, " dry regeneration " can be understood as the moisture of removing in drier, makes drier recover the function of water suction.Alternatively, can filled with dried drying prescription in drying tower 2, drier can be molecular sieve, silica gel, anhydrous calcium chloride, anhydrous magnesium sulfate, dead plaster or other has the material of water absorbing capacity.Thus, by drier is set, can effectively remove the moisture in the gas passing into from raw material tower 1.
Particularly, drying tower 2 is one, and step S31 is between step S3 and step S4.In other words, after the moisture in the brown coal of the every absorption of drier in drying tower 2, just drier is carried out to primary drying regeneration.Certainly, the utility model is not limited to this, and in another example of the present utility model, the drier in drying tower 2 also can repeatedly absorb the moisture in brown coal until approach after saturation state, again drier is dried to regeneration, thereby can improves the utilization rate of drier and the rate of drying of brown coal.
Alternatively, drying tower 2 is two, and one of them drying tower 2 performs step in the process of S2 and step S3 successively, another drying tower 2 execution step S31.That is to say, when one of them drying tower 2 and raw material tower 1 carry out gas exchange, can carry out regenerative operation to the drier in another drying tower 2, thereby can improve the drying efficiency of brown coal.
Further, as shown in Figure 2, be respectively equipped with intake channel 23 and exhaust channel 24 on drying tower 2, wherein intake channel 23 is for passing into high temperature drying gas, and exhaust channel 24 is taken away drier moisture and carried out the gas after heat exchange with drier for discharging.In one of them example of the present utility model, intake channel 23 can be located at the bottom of drying tower 2, and exhaust channel 24 can be located at the top of drying tower 2, and intake channel 23 and exhaust channel 24 are connected with drying tower 2 respectively.Certainly, the utility model is not limited to this, in other examples of the present utility model, intake channel 23 can be located at the top of drying tower 2 and the bottom that exhaust channel 24 can be located at drying tower 2, or intake channel 23 and exhaust channel 24 are located at respectively other position of drying tower 2.Intake channel 23 is connected with drying tower 2, for pass into high temperature drying gas in drying tower 2, this high temperature drying gas can carry out heat exchange so that drier has certain temperature with drier, thereby the gas that makes to enter in drying tower 2 has certain temperature, the heat having in this gas can be used as one of origin of heat of brown coal intensification, when the gas that carries a large amount of steam passing into from raw material tower 1 contacts with drier, liberated heat also can be used as one of origin of heat of brown coal intensification, when the brown coal in raw material tower 1 are dried processing, the gas entering raw material tower 1 from drying tower 2 has certain temperature, the air-flow that utilization has uniform temperature heats brown coal, thereby the moisture in brown coal is taken out of, in addition, drier can move closer to saturation state through utilization repeatedly, pass into high temperature drying gas and can take away the moisture in drier, thereby make desiccant regeneration, exhaust channel 24 is connected with drying tower 2, for discharging, take away the moisture of drier and carry out the gas after heat exchange with drier.
Alternatively, high temperature drying gas is temperature at high temperature drying air or the high temperature drying nitrogen of 110 ℃～300 ℃.When high temperature drying gas is air, can be directly emptying, when high temperature drying gas is nitrogen, reusable edible is to reduce production costs.It will be appreciated that, high temperature drying gas can also be other gas, and is not limited to air or nitrogen.Certainly, the utility model is not limited to this, and in another example of the present utility model, high temperature drying gas can also be the flue gas of temperature at 110 ℃～300 ℃.Here, it should be noted that, the temperature of high temperature drying gas can be determined according to the kind of drier, and " flue gas " can be understood as flue gas, and this flue gas is known by those skilled in the art, at this, is not described in detail.
Particularly, raw material tower 1 and drying tower 2 communicate by air inlet pipeline 21 and outlet pipe 22 respectively, and wherein the two ends of air inlet pipeline 21 are located at respectively the top of drying tower 2 and raw material tower 1, and the two ends of outlet pipe 22 are located at respectively the bottom of drying tower 2 and raw material tower 1.As shown in Figure 2, one end of air inlet pipeline 21 is connected to the top of drying tower 2, its other end is connected to the top of raw material tower 1, so that the top of drying tower 2 and raw material tower 1 is communicated with, one end of outlet pipe 22 is connected to the bottom of drying tower 2, its other end is connected to the bottom of raw material tower 1, so that the bottom of drying tower 2 and raw material tower 1 is communicated with.
Certainly, the utility model is not limited to this, and in another embodiment of the present utility model, the two ends of air inlet pipeline 21 also can be located at respectively the bottom of drying tower 2 and raw material tower 1, and the two ends of outlet pipe 22 are located at respectively the top of drying tower 2 and raw material tower 1.It will be appreciated that, the setting position of air inlet pipeline 21 and outlet pipe 22 is not limited to top and bottom, also can be arranged on other position of corresponding drying tower 2 or raw material tower 1.
As shown in Figure 2, the brown coal drying system 100 according to the utility model embodiment, comprising: raw material tower 1, at least one drying tower 2 and vavuum pump 3.In raw material tower 1, limit spatial accommodation 11 to hold brown coal, on raw material tower 1, there is charging aperture 12 and discharging opening 13.For example, in the example of Fig. 2, in raw material tower 1, limit for holding the spatial accommodation 11 of brown coal, this spatial accommodation 11 is also that brown coal carry out dry place, the top of raw material tower 1 is provided with charging aperture 12 for pack brown coal to be dried in spatial accommodation 11, and the bottom of raw material tower 1 is provided with discharging opening 13 for discharging dried brown coal.
The interior placement drier of drying tower 2.That is to say, in drying tower 2, limit for holding the space that holds of drier, alternatively, can filled with dried drying prescription in drying tower 2, alternatively, drier can be molecular sieve, silica gel, anhydrous calcium chloride, anhydrous magnesium sulfate or dead plaster.Certainly, the utility model is not limited to this, and drier also can be other material with water absorbing capacity.
At least one drying tower 2 communicates with raw material tower 1 by air inlet pipeline 21 and outlet pipe 22 respectively, and vavuum pump 3 is located on air inlet pipeline 21.That is to say, drying tower 2 and raw material tower 1 are connected by air inlet pipeline 21 and outlet pipe 22, and vavuum pump 3 is located on air inlet pipeline 21.It will be appreciated that, the quantity of drying tower 2 can be according to actual requirement setting, to meet better actual requirement.
According to the brown coal drying system 100 of the utility model embodiment, by vavuum pump 3 is set, can be by the pressure decreased in raw material tower 1, thereby the moisture in brown coal is rapid evaporation at a lower temperature, be conducive to reduce energy consumption and improve rate of drying, and because baking temperature is low, avoided brown coal because of localized hyperthermia, to cause the generation of the accidents such as spontaneous combustion or blast.In brown coal drying process, brown coal and drier directly contact, and both all remain static, and brown coal change of granularity is little, thereby has increased the selectable range of drier.In addition, this system is simple in structure, easy to maintenance.
In an embodiment of the present utility model, on drying tower 2, be respectively equipped with intake channel 23 and exhaust channel 24, wherein intake channel 23 is for passing into high temperature drying gas, and exhaust channel 24 is taken away drier moisture and carried out the gas after heat exchange with drier for discharging, as shown in Figure 2.Thus, can realize desiccant regeneration, and after high temperature drying gas and drier heat exchange, make drier there is certain temperature, then in this drier and raw material tower 1, the gas with steam carries out heat exchange, make the gas that will enter in raw material tower 1 there is uniform temperature, thereby can be used as the origin of heat that brown coal heat up.Certainly, the utility model is not limited to this, in other embodiment of the present utility model, on drying tower 2, also can not be provided with intake channel 23 and exhaust channel 24, when the drier in drying tower 2 reaches capacity state, can take out the drier in saturation state in drying tower 2, in drying tower 2, put into new drier.
Alternatively, high temperature drying gas is high temperature drying air or high temperature drying nitrogen.When high temperature drying gas is air, can be directly emptying, when high temperature drying gas is nitrogen, reusable edible is to reduce production costs.It will be appreciated that, high temperature drying gas can also be other gas, and is not limited to air or nitrogen.Certainly, the utility model is not limited to this, and in another example of the present utility model, high temperature drying gas can also be the flue gas of temperature at 110 ℃～300 ℃.Here, it should be noted that, the temperature of high temperature drying gas can be determined according to the kind of drier, and " flue gas " can be understood as flue gas, and this flue gas is known by those skilled in the art, at this, is not described in detail.As shown in Figure 2, when the brown coal in raw material tower 1 are dried processing, can only open air inlet pipeline 21, start the vavuum pump 3 on air inlet pipeline 21, the gas in raw material tower 1 can flow in drying tower 2 gradually, pressure in control raw material tower 1 is in a lower scope, after the vacuum that reaches technological requirement until raw material tower 1, due to the pressure decreased in raw material tower 1, thereby the moisture in brown coal can be deviate from a lower temperature, close vavuum pump 3, close air inlet pipeline 21, progressively open outlet pipe 22, making gas automatic slowly in drying tower 2 injects in raw material tower 1, by air-flow, directly contact with brown coal, in order to brown coal, heat up, and the moisture of deviating from brown coal is taken away, while reaching pressure balance between tower 2 to be dried and raw material tower 1, close outlet pipe 22, so far complete the gas exchange process between a raw material tower 1 and drying tower 2, thereby brown coal are through primary drying.Repeatedly repeat aforesaid operations, can further be dried brown coal.
In an embodiment of the present utility model, the two ends of air inlet pipeline 21 are located at respectively the top of drying tower 2 and raw material tower 1, and the two ends of outlet pipe 22 are located at respectively the bottom of drying tower 2 and raw material tower 1.As shown in Figure 2, one end of air inlet pipeline 21 is connected to the top of drying tower 2, its other end is connected to the top of raw material tower 1, so that the top of drying tower 2 and raw material tower 1 is communicated with, one end of outlet pipe 22 is connected to the bottom of drying tower 2, its other end is connected to the bottom of raw material tower 1, so that the bottom of drying tower 2 and raw material tower 1 is communicated with.
Certainly, the utility model is not limited to this, in another embodiment of the present utility model, the two ends of air inlet pipeline 21 also can be located at respectively the bottom of drying tower 2 and raw material tower 1, and the two ends of outlet pipe 22 are located at respectively the top (scheming not shown) of drying tower 2 and raw material tower 1.It will be appreciated that, the setting position of air inlet pipeline 21 and outlet pipe 22 is not limited to top and bottom, also can be arranged on other position of corresponding drying tower 2 or raw material tower 1.
For example, in the example of Fig. 2, the air inlet pipeline 21 between vavuum pump 3 and drying tower 2 is provided with the first valve 211, and outlet pipe 22 is provided with the second valve 221.Thus, when opening the first valve 211, close the second valve 221, while starting vavuum pump 3, gas in raw material tower 1 flows in drying tower 2 gradually, make the pressure decreased in raw material tower 1, thereby brown coal can be dried at lower temperature, prevented the generation of the phenomenons such as overheated and spontaneous combustion or blast.
Further, on intake channel 23 and exhaust channel 24, be respectively equipped with the 3rd valve 231 and 241.Thus, when the drier in drying tower 2 carries out high temperature drying processing, can open respectively the 3rd valve 231 and 241 on intake channel 23 and exhaust channel 24, high temperature drying gas enters in drying tower 2 to carry out heat exchange and to take away the moisture in drier with drier by intake channel 23, then the gas that carries out heat exchange with drier and take away the moisture in drier is by outside exhaust channel 24 discharge drying towers 2, make desiccant regeneration, thereby drier can recycled for multiple times, effectively reduces cost.It will be appreciated that, the regeneration temperature of drier can be determined according to the kind of drier.
Further, the top of raw material tower 1 is provided with deduster 4, and alternatively, this deduster 4 is sack cleaner 4.Thus, by deduster 4 is set, can effectively remove the dust in raw material tower 1, be conducive to the stable operation of vavuum pump 3.
As shown in Figure 2, drying tower 2 is two.Thus, can effectively improve the drying efficiency of brown coal.
In one of them embodiment of the present utility model, in raw material tower 1, by charging aperture 12, pack brown coal into, in two drying towers 2, be respectively charged into drier (as molecular sieve), open the first valve 211 on one of them drying tower 2, all the other valve complete shut-downs.Start vavuum pump 3, in raw material tower 1, gas flows into this drying tower 2 gradually, and the pressure of controlling in raw material tower 1 is 0.001-0.08MPa, after the vacuum that reaches technological requirement, closes vavuum pump 3 until raw material tower 1, closes the first valve 211.Progressively open the second valve 221 on this drying tower 2, make the gas automatic slowly in this drying tower 2 inject raw material tower 1, while reaching pressure balance between this drying tower 2 and raw material tower 1, close the second valve 221.So far complete the gas exchange process between a raw material tower 1 and one of them drying tower 2.
Open the first valve 211 on another drying tower 2, start vavuum pump 3, in raw material tower 1, gas flows into this drying tower 2 gradually, the same pressure of controlling in raw material tower 1 is 0.001-0.08MPa, after the vacuum that reaches technological requirement until raw material tower 1, close vavuum pump 3, close the first valve 211 on this drying tower 2.Progressively open the second valve 221 on this drying tower 2, make the gas automatic slowly in this drying tower 2 inject raw material tower 1, while reaching pressure balance between this drying tower 2 and raw material tower 1, close the second valve 221.So far complete the gas exchange process between a raw material tower 1 and this drying tower 2.
In the gas exchange process carrying out between raw material tower 1 and one of them drying tower 2, can carry out the desiccant regeneration operation in another drying tower 2 simultaneously, concrete mode is: open respectively the intake channel 23 of this drying tower 2 and the 3rd valve 231 and 241 on exhaust channel 24, air inlet on intake channel 23 is filled with high temperature drying gas, and desiccant dryness is regenerated.After desiccant dryness, stop air feed, and close the 3rd valve 231 and 241 on intake channel 23 and exhaust channel 24.
Same, in the gas exchange process carrying out between raw material tower 1 and drying tower 2, can carry out the desiccant regeneration operation in drying tower 2 simultaneously, concrete mode is: open the intake channel 23 of this drying tower 2 and the 3rd valve 231 and 241 on exhaust channel 24, the air inlet on the intake channel 23 of this drying tower 2 is filled with high temperature drying gas.After desiccant dryness, stop air feed, and close the 3rd valve 231 and 241 on intake channel 23 and exhaust channel 24.
Alternatively, the pressure that vavuum pump 3 is controlled in raw material tower 1 is 0.001～0.08MPa.In one of them example of the present utility model, when being provided with two drying towers 2, open the first valve 211 on the air inlet pipeline 21 being communicated with raw material tower 1 of one of them drying tower 2, all the other valve Close Alls, start vavuum pump 3, the gas in raw material tower 1 flows into drying tower 2 gradually, and the pressure in raw material tower 1 can reduce gradually, the pressure that can control in raw material tower 1 is 0.001～0.08MPa, and now the moisture in brown coal can be deviate from lower temperature.Certainly, the utility model is not limited to this, starts vavuum pump 3, and the pressure that also can control in raw material tower 1 is other numerical value.
Alternatively, the temperature of the brown coal in raw material tower 1 is 50～150 ℃.During desiccant regeneration, require drier in higher state of temperature, therefore, drier itself has played certain accumulation of heat effect, in addition, when steam contacts with drier, also can discharge a part of heat, this two parts heat together, via the gas flow process between drying tower 2 and raw material tower 1, pass to brown coal to provide brown coal drying required heat, and to adjust air-flow, enter the size of raw material tower 1 interior speed by controlling the size of the second valve 221 on outlet pipe 22, the temperature that can control thus raw material tower 1 interior brown coal is 50～150 ℃, thereby prevented that brown coal are subject to localized hyperthermia and the phenomenon that spontaneous combustion is even exploded occurs.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claim and equivalent thereof.
Claims (9)
1. a brown coal drying system, is characterized in that, comprising:
Raw material tower, limits spatial accommodation to hold brown coal in described raw material tower, on described raw material tower, have charging aperture and discharging opening;
At least one drying tower, described at least one, drying tower communicates with described raw material tower by air inlet pipeline and outlet pipe respectively, places drier in described drying tower; And
Vavuum pump, described vavuum pump is located on described air inlet pipeline.
2. brown coal drying system according to claim 1, it is characterized in that, on described drying tower, be respectively equipped with intake channel and exhaust channel, wherein said intake channel is used for passing into high temperature drying gas, and described exhaust channel is taken away described drier moisture and carried out the gas after heat exchange with described drier for discharging.
3. brown coal drying system according to claim 2, is characterized in that, described high temperature drying gas is temperature at air or the nitrogen of 110 ℃～300 ℃.
4. brown coal drying system according to claim 1, is characterized in that, the two ends of described air inlet pipeline are located at respectively the top of described drying tower and described raw material tower, and the two ends of described outlet pipe are located at respectively the bottom of described drying tower and described raw material tower.
5. brown coal drying system according to claim 1, is characterized in that, the top of described raw material tower is provided with deduster.
6. according to the brown coal drying system described in any one in claim 1-5, it is characterized in that, described drying tower is two.
7. brown coal drying system according to claim 1, is characterized in that, the pressure that described vavuum pump is controlled in described raw material tower is 0.001～0.08MPa.
8. brown coal drying system according to claim 1, is characterized in that, the temperature of the brown coal in described raw material tower is 50～150 ℃.
9. brown coal drying system according to claim 1, is characterized in that, described drier is molecular sieve, silica gel, anhydrous calcium chloride, anhydrous magnesium sulfate or dead plaster.
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|---|---|---|---|---|
| CN103673510A (en) * | 2013-05-14 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Lignite drying method and lignite drying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110106006A (en) * | 2019-04-04 | 2019-08-09 | 太原理工大学 | A kind of non-heating power dewatering of Bed for Fine Coal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142402C (en) * | 1998-12-04 | 2004-03-17 | 胡培光 | Serial grains vacuum drying and storing facilities |
| EP1650515A1 (en) * | 2004-10-21 | 2006-04-26 | S.B. Plastic Machinery S.r.l. | Vacuum dryer for granular plastic materials |
| CN201449126U (en) * | 2009-07-31 | 2010-05-05 | 潍坊沃尔特化学有限公司 | A vacuum drying cabinet filtering equipment |
| RU2406951C1 (en) * | 2009-08-21 | 2010-12-20 | Закрытое Акционерное Общество "Твин Трейдинг Компани" | Procedure for drying capillary-porous loose materials and device for implementation of this procedure |
| AT508754B1 (en) * | 2010-03-03 | 2011-04-15 | Wittmann Kunststoffgeraete | DEVICE FOR DRYING BULK GOODS |
| CN103673510B (en) * | 2013-05-14 | 2016-06-22 | 北京神雾环境能源科技集团股份有限公司 | Brown coal drying method and brown coal drying system |
-
2013
- 2013-05-16 CN CN201310182234.8A patent/CN103673510B/en active Active
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673510A (en) * | 2013-05-14 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Lignite drying method and lignite drying system |
| CN103673510B (en) * | 2013-05-14 | 2016-06-22 | 北京神雾环境能源科技集团股份有限公司 | Brown coal drying method and brown coal drying system |
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| Publication number | Publication date |
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| CN103673510A (en) | 2014-03-26 |
| CN103673510B (en) | 2016-06-22 |
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Denomination of utility model: Lignite drying system and technology with superheated steam capable of recycling waste steam heat Effective date of registration: 20180322 Granted publication date: 20140319 Pledgee: The Bank of Beijing Limited by Share Ltd. Anwar Road Branch Pledgor: Shenwu Technology Group Co.,Ltd. Registration number: 2018990000210 |
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