CN211823488U - Coal sample fluidized drying device - Google Patents
Coal sample fluidized drying device Download PDFInfo
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- CN211823488U CN211823488U CN202020382985.XU CN202020382985U CN211823488U CN 211823488 U CN211823488 U CN 211823488U CN 202020382985 U CN202020382985 U CN 202020382985U CN 211823488 U CN211823488 U CN 211823488U
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Abstract
The utility model provides a device that coal sample fluidization was dried, the device have the stoving time short, dry even power consumptive advantage such as few. The coal sample fluidization drying device comprises a fluidization unit, an air supply unit, a sample introduction unit, a sample outlet unit and a dust removal unit; the fluidization unit comprises a hot air chamber, a fluidization chamber and a settling chamber which are sequentially arranged from bottom to top, the hot air chamber and the fluidization chamber are separated by adopting a structure which is ventilated and can bear a coal sample, and the settling chamber provides a flowing space for drying the coal sample; the settling chamber is connected with an induced draft fan to lead out wind; the air supply unit is used for supplying hot air to the hot air chamber; the sample introduction unit is used for feeding a coal sample into the fluidization chamber; the sample outlet unit is used for sampling the dried coal sample; the dust removal unit is connected to the upper part of the settling chamber or arranged in the settling chamber and used for purifying the heated coal sample by hot air.
Description
Technical Field
The utility model relates to a coal sample fluidization drying's device for coal system appearance in-process carries out fluidization fast drying to the coal sample.
Background
In the coal-fired power plant, the quality of coal is required to be detected no matter the coal is put into the field or the coal is put into the furnace, in the coal sample preparation process, the drying of the coal sample is an important link in the coal sample preparation process, the drying time of the coal sample influences the working efficiency, and the drying uniformity and the temperature control accuracy influence the economic benefit of the power plant.
The sample drying device that coal fired power plant used at present is far infrared heating drying device, and the device is longer to coal sample stoving time, and the power consumption is big and the coal sample is heated less evenly (because of the coal is in static state), and is not suitable with the required quick, high-efficient, accurate development requirement of coal fired power plant intelligent management.
Disclosure of Invention
In order to solve the technical insufficiency that current coal sample drying device exists, the utility model provides a coal sample fluidization drying device, the device have the stoving time short, dry even power consumptive advantage such as few.
The utility model discloses a concrete technical scheme as follows:
a coal sample fluidization drying device comprises a fluidization unit, an air supply unit, a sample introduction unit, a sample outlet unit and a dust removal unit;
the fluidization unit comprises a hot air chamber, a fluidization chamber and a settling chamber which are sequentially arranged from bottom to top, the hot air chamber and the fluidization chamber are separated by adopting a structure which is ventilated and can bear a coal sample, and the settling chamber provides a flowing space for drying the coal sample; the settling chamber is connected with an induced draft fan to lead out wind;
the air supply unit is used for supplying hot air to the hot air chamber;
the sample introduction unit is used for feeding a coal sample into the fluidization chamber;
the sample outlet unit is used for discharging a dried coal sample;
the dust removal unit is arranged at the upper part of the settling chamber and is used for purifying hot air of the heated coal sample;
the hot air sent out by the air supply unit enters the fluidization chamber from the hot air chamber through the bottom of the fluidization chamber under the suction of the induced draft fan; meanwhile, the coal sample is fed into the fluidizing chamber from the sample introduction unit, the coal sample in the fluidizing chamber is fluidized and dried by hot air, and the dried hot air is led out after passing through the dust removal unit.
Furthermore, the upper part of the settling chamber or the upper part of the dust removal unit is also provided with an exhaust chamber, and the exhaust chamber is connected with the induced draft fan to lead out wind.
Furthermore, the whole fluidizing chamber is designed in a gradually expanding mode.
Furthermore, a stirring device is arranged in the fluidizing chamber and used for stirring the coal sample in the fluidizing chamber.
Further, the air supply unit comprises an air supply blower, a heater and an air pipe; the air sent by the air feeder is heated by the heater and then sent to the hot air chamber.
Furthermore, the sample introduction unit comprises a coal inlet hopper, a coal inlet pipe and a gate valve arranged at the outlet of the coal inlet hopper, the coal hopper is connected with the coal inlet pipe, the coal inlet pipe is connected to the lower part of the fluidization chamber, and the gate valve is arranged between the coal inlet hopper and the coal inlet pipe and used for controlling the coal inlet amount;
furthermore, the sample outlet unit comprises a coal outlet hopper, the coal outlet hopper is arranged at the bottom of the hot air chamber, and a coal discharge valve is arranged between the coal outlet hopper and the hot air chamber.
Furthermore, a ventilation plate with dense holes is arranged between the hot air chamber and the fluidization chamber, and the ventilation plate is rotatably supported between the hot air chamber and the fluidization chamber through a rotating cylinder.
Further, the coal-saving device also comprises a control unit, wherein the gate valve, the coal discharging valve and the rotary cylinder are respectively in control connection with the control unit, the gate valve is provided with an actuator, and the gate valve is connected with the control unit through the actuator.
Furthermore, the dust removal unit adopts a sintered filter element, is arranged in the settling chamber and is positioned at the top of the settling chamber, and is used for filtering the settled hot air.
The utility model discloses in, the heater heats through filterable clean air is advanced through the blast pipe by the forced draught blower, then gets into hot-blast room, provides required wind temperature, wind pressure and the amount of wind for coal is dried.
Coal containing certain moisture is blown up by hot air with corresponding pressure and temperature through the ventilation plate after entering the fluidization chamber and is in a semi-suspension state, meanwhile, the coal is more conducive to fluidization under the action of the stirring and twisting device, and the fluidization state of the coal is better and better along with the separation of the moisture of the coal.
The dried coal is introduced from the coal hopper, enters the fluidization chamber through the coal guide pipe after the gate valve is opened, and is automatically closed after the coal is fed.
When the coal is dried, the coal discharge valve is in a closed state, the air pressure of the hot air chamber is ensured, the coal is slowly opened through the coal discharge valve after the coal is dried and is placed into the coal hopper, and the dried coal is sucked away by the negative pressure pipe at the bottom of the coal hopper for crushing.
The coal is at the in-process of drying, makes the mixture carry out dilatation deceleration and backward flow when the deposit room, and such process is repeated just the process that moisture in the coal appeared, and the exhaust gets into the exhaust chamber after the filter filters, discharges in the atmosphere after leading to the draught fan through the aspiration channel.
Compared with the prior art, the utility model have following beneficial effect:
1. the utility model discloses utilize the wind pressure that the air supply in-process produced to advance the fluidization to the coal sample that needs to dry, the temperature that utilizes the air supply is dried to the coal sample that needs to dry, makes the coal sample be in dynamic drying state, and not only the stoving time is short, power consumptive few, and drying temperature is even moreover, control is convenient, has solved the not enough that far infrared coal sample drying device exists.
2. The utility model discloses a coal sample drying device is applicable to the coal sample after the full water test and dries, is applicable to various coal. Different drying temperatures can be set according to different drying requirements during drying, and automatic control can be realized.
3. The utility model discloses a coal sample drying device generally adopts 30-40 ℃ of low temperature stoving, does not have the influence to the coal quality measurement.
Drawings
FIG. 1 is a schematic structural diagram of a coal sample fluidized drying device in an embodiment (also referred to as an abstract drawing);
in the figure, 1-blower; 2-air pipe; 3-a heater; 4-hot air chamber; 5-a ventilating plate; 6-a stirring device; 7-a fluidizing chamber; 8-a coal feeding hopper; 9-a gate valve; 10-an actuator; 11-a coal inlet pipe; 12-a coal discharge valve; 13-coal hopper; 14-a coal guide pipe; 15-a settling chamber; 16-a filter; 17-an exhaust chamber; 18-an air suction pipe; 19-a draught fan; 20-framework.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in figure 1, the coal sample fluidized drying device of the utility model mainly comprises a fluidizing unit, an air supply unit, a sample introduction unit, a sample outlet unit and a dust removal unit. The fluidization unit comprises a hot air chamber 4, a fluidization chamber 7, a settling chamber 15 and an exhaust chamber 17 which are sequentially arranged from bottom to top, wherein a structure which is ventilated and can bear a coal sample is adopted between the hot air chamber 4 and the fluidization chamber 7, and the exhaust chamber 17 is connected with an induced draft fan 19;
wherein, the air supply unit is used for supplying hot air to the hot air chamber 4; the sample introduction unit is used for feeding a coal sample into the fluidization chamber 7; the sample outlet unit is used for sampling the dried coal sample; the dust removal unit is used for purifying hot air of the heated coal sample;
the hot air sent out by the air supply unit enters the fluidization chamber 7, the hot air enters the fluidization chamber 7 from the bottom of the fluidization chamber 7 under the suction of the induced draft fan 19, the coal sample is sent into the fluidization chamber 7 from the sample introduction unit, the hot air fluidizes and dries the coal sample in the fluidization chamber, and the hot air flows through the settling chamber 15 and is discharged from the exhaust chamber. The dust removal unit is arranged in the settler 15, and the hot air after dust removal enters the exhaust chamber 17 and is led out by the induced draft fan 19 for discharge or utilization.
The air supply unit comprises an air feeder 1, a heater 3 and an air pipe 2; the air sent by the air feeder is heated by the heater and then sent to the hot air chamber 4;
the sample introduction unit comprises a coal inlet hopper 8, a coal inlet pipe 11 and a gate valve 10 arranged at the outlet of the coal inlet hopper, the coal hopper is connected with the coal inlet pipe, the coal inlet pipe is connected with the lower part of the fluidization chamber 7, and the gate valve 9 is arranged between the coal inlet hopper and the coal inlet pipe and used for controlling the coal inlet amount;
the sample outlet unit comprises a coal outlet hopper 14 which is arranged at the bottom of the hot air chamber, and a coal discharge valve is arranged between the coal outlet hopper and the hot air chamber;
the apparatus is further provided with a frame 20 for supporting and holding the various components of the fluidized drying apparatus, while control lines or pipes may be routed.
A fluidization unit: in order to dry the coal sample quickly and uniformly, a dense pore plate is used for ventilation, so that the coal sample is blown by hot air with certain pressure and temperature and is suspended in a fluidization chamber in a semi-suspension manner, the coal sample and the dry hot air can be mixed fully, and the effect of quickly and uniformly drying is achieved.
A dust removal unit: the dust removal unit is generally arranged in the settling chamber 15, and in order to quickly discharge exhaust gas and not take away dust in the coal sample in the drying process of the coal sample, the dust removal device adopts a 3-micron multi-tube sintered filter element for dust removal, so that the coal sample is not lost, and the exhaust gas is not polluted.
An air supply unit: the air supply unit mainly ensures that the air temperature, the air quantity and the air pressure required by the coal sample drying can be provided when the coal sample is dried, wherein, in order to ensure the air temperature when the coal sample is dried, an online air electric heating device is selected, and the heating temperature is automatically controlled to be +5 ℃ at the temperature required by the coal sample drying. In order to ensure the uniform air pressure and the required air quantity of each point of the air permeable plate, a fluidizing air chamber with a certain volume is arranged in the air supply unit, so that the air pressure of the air chamber at the bottom of the air permeable plate is uniformly distributed and does not change in the coal sample drying process, and the reliability and the stability of the flow during the coal sample drying process are ensured.
A settling chamber: the settling chamber is a flowing space for drying the coal sample, the speed of the coal sample is reduced to 3-5 m/s when the coal sample is thrown to the settling chamber at an initial speed of 15-20 m/s after being fluidized in the fluidizing chamber, the coal sample flows back into the fluidizing chamber along with the reduction of the expansion speed of the settling chamber to zero, then the coal sample is thrown to the settling chamber again after being fluidized, the aim of drying the coal sample is achieved through a sequential circulating process, a dense-phase area, a dilute-phase area and a backflow area are arranged on a path through which the coal sample passes in the drying process, and exhaust gas enters the dust removal chamber after the coal sample reflows, is discharged into the atmosphere after dust removal, so a certain working space is required to be designed for the settling chamber, and the rising flowing time of the coal sample is selected to be 0.3.
The sample introduction unit and the sample discharge unit: the sample introduction unit is connected with the actuator through a gate valve, and can automatically open and connect the front coal sample when the drying device has coal inlet conditions after being started and preheated; the sample outlet unit consists of a hot air chamber and a discharge valve, wherein the discharge valve is closed to form a closed air holding chamber in the coal sample drying process to provide hot air with required pressure and temperature for the coal sample drying, when a fluidizing air chamber bears a ventilation plate and is opened after the coal sample is dried, the coal sample is put into the hot air chamber, after a coal-dischargeable negative-pressure coal suction signal is received at the rear, a bottom valve of the sample outlet unit is slowly opened to discharge coal to a coal outlet hopper, and the coal sample in the drying device is completely discharged under the auxiliary action of a vibrator, so that a drying cycle is completed.
The utility model discloses the stoving process of device is as follows:
1. firstly, confirming that the ventilation plate 5, the gate valve 9 and the coal discharging valve 12 are in a closed state, and adding a coal sample into the fluidization chamber.
2. And starting the induced draft fan 19 to keep the interior of the drying device at negative pressure.
3. The stirring device 6 is started together with the blower 1.
4. The heater 3 is activated to heat the supply air (the temperature required for drying is preset for different coal types).
5. When the exhaust temperature is 25-30 ℃ (25 ℃ when the natural temperature is low and 30 ℃ when the natural temperature is high), and when the coal is detected to start to be fed to the drying device in front, the gate valve 9 is opened to uniformly feed the coal into the fluidization chamber, the gate valve 9 is closed after the coal feeding is finished, and the drying device is in a working state.
6. When the exhaust temperature is close to the temperature required by drying and is unchanged, the coal is dried, the heater 3, the stirring device 6, the blower 1 and the induced draft fan 19 are stopped in sequence, and the negative pressure of the coal suction pipe is required to be established after the coal is conveyed backwards and dried.
7. Firstly, the ventilation plate 5 is opened to put coal into the hot air chamber 4, the coal valve 12 is slowly opened to put coal into the coal hopper 13, and then the coal is guided into the coal suction negative pressure pipe through the coal guide pipe 14 to enter the next procedure.
8. And (3) starting rappers arranged on the filter 16 and the fluidizing chamber 7 while discharging coal, and simultaneously starting an induced draft fan for back flushing to remove accumulated coal in the drying device.
Example two:
the alternative design of this example is: the fluidizing chamber 7 is of a divergent design as a whole. The whole fluidization chamber 7 of the embodiment adopts a gradually expanding design, and after rising along with the fluidization of the coal sample from the ventilation plate 5 upwards, the whole fluidization chamber 7 is gradually expanded, so that the mixture of the coal sample and hot air is gradually converted into a dilute phase from a concentrated phase, and the contact area of the coal sample and air is increased, the drying speed of the coal sample is increased, and the drying effect is better; meanwhile, the whole fluidization chamber adopts a gradually expanding design to ensure that the initial speed of the coal sample after being fluidized is higher, and then the coal sample is subjected to speed reduction and backflow to enter the next circulation, so that the coal sample is always kept in a region with higher hot air temperature for mixing and drying.
Meanwhile, the design of the large volume of the hot air chamber 4, in order to make the wind temperature and the wind pressure passing through the ventilation plate uniform, the design of the large volume is adopted for the hot air chamber 4, so that the hot air chamber serves as a wind storage chamber for fluidizing wind, the wind storage volume is 2 times of ventilation volume, and the uniformity of the pressure and the temperature of the fluidizing wind is ensured.
Example three:
the alternative design of this example is: the fluidizing chamber 7 is also provided with a stirring device 6 for stirring the coal sample in the fluidizing chamber 7. The stirring device 6 is arranged in the fluidization chamber 7, and in order to prevent the relatively humid coal sample from forming a cluster shape after entering the fluidization chamber 7 and being incapable of being fluidized after being implanted, after the stirring device 6 is arranged, the clustered part of the coal sample can be smashed through rake teeth of the stirring device 6, so that the coal sample is promoted to enter a fluidization state during drying.
Example four:
the alternative design of this example is: the design of the ventilating plate 5 with dense holes is adopted between the hot air chamber 4 and the fluidization chamber 7, and the ventilating plate 5 is rotatably supported between the hot air chamber 4 and the fluidization chamber 7 through a rotating cylinder. In the embodiment, the ventilating plate 5 is designed as a dense pore plate, and is supported by a high-torque rotating cylinder, so that the ventilating plate has triple functions, is used as a bottom plate of a fluidizing chamber and is used for storing a coal sample to be dried in a closed state; secondly, ventilation is carried out during the drying of the coal sample, and as the ventilation plates 5 are dense small holes, the air distribution and fluidization power are uniform, and the fluidization effect is better; thirdly, the coal sample can be overturned for discharging after being dried, and the rotary radius exceeds the diameter of the turning plate, so the discharging is complete and has no residue.
Example five:
the alternative design of this example is: the device also comprises a control unit, a gate valve 9 of the sample injection unit, a coal discharge valve 12 between the hot air chamber 4 and the coal hopper of the sample outlet unit, and a rotary cylinder which are respectively connected with the control unit, and the opening and closing of the rotary cylinder are automatically controlled by the control unit. The gate valve 9 is provided with an actuator, and the gate valve 9 is connected with the control unit through the actuator. The automatic continuous drying of the coal sample can be realized through the program connection of each control unit.
Example six:
the alternative design of this example is: the dust removal unit adopts a sintered filter element, is arranged in the settling chamber and is positioned at the top of the settling chamber and used for filtering the settled hot air. The sintering filter core that the dust removal was used adopts the elastic plate fixed and adopts the cushion to be connected between settling chamber and exhaust chamber, when the coal sample is drying the back and is beating to the dust removal filter core and take off dirt, the shake frequency and the amplitude of filter core can reach the great value, are favorable to the cleanness of dust removal pipe, clean of blowback again for each stoving circulation dust removal pipe keeps clean state.
Claims (10)
1. The utility model provides a coal sample fluidization drying's device which characterized in that: the device comprises a fluidization unit, an air supply unit, a sample introduction unit, a sample discharge unit and a dust removal unit;
the fluidization unit comprises a hot air chamber, a fluidization chamber and a settling chamber which are sequentially arranged from bottom to top, the hot air chamber and the fluidization chamber are separated by adopting a ventilating structure capable of bearing a coal sample, and the settling chamber provides a flowing space for drying the coal sample; the settling chamber is connected with an induced draft fan to lead out wind;
the air supply unit is used for supplying hot air to the hot air chamber;
the sample introduction unit is used for feeding a coal sample into the fluidization chamber;
the sample outlet unit is used for discharging a dried coal sample;
the dust removal unit is arranged at the upper part of the settling chamber and is used for purifying hot air of the heated coal sample;
the hot air sent out by the air supply unit is sucked by the draught fan and enters the fluidization chamber from the hot air chamber through the bottom of the fluidization chamber; meanwhile, the coal sample is fed into the fluidizing chamber from the sample introduction unit, the coal sample in the fluidizing chamber is fluidized and dried by hot air, and the dried hot air is led out after being dedusted by the dedusting unit.
2. The coal sample fluidized drying device according to claim 1, characterized in that: and an exhaust chamber is further arranged on the upper part of the settling chamber or the upper part of the dust removal unit and is connected with the draught fan to lead out air.
3. The coal sample fluidized drying device according to claim 1, characterized in that: the whole fluidization chamber is in a gradually expanding design.
4. The coal sample fluidized drying device according to claim 3, characterized in that: and a stirring device is also arranged in the fluidizing chamber and used for stirring the coal sample in the fluidizing chamber.
5. The coal sample fluidized drying device according to claim 4, characterized in that: the air supply unit comprises an air feeder, a heater and an air pipe; the air sent by the air feeder is heated by the heater and then sent to the hot air chamber.
6. The coal sample fluidized drying device according to claim 5, characterized in that: the sample introduction unit comprises a coal inlet hopper, a coal inlet pipe and a gate valve arranged at the outlet of the coal inlet hopper, the coal hopper is connected with the coal inlet pipe, the coal inlet pipe is connected with the lower part of the fluidization chamber, and the gate valve is arranged between the coal inlet hopper and the coal inlet pipe and used for controlling the coal inlet amount.
7. The coal sample fluidized drying device according to claim 6, characterized in that: the sample outlet unit comprises a coal outlet hopper which is arranged at the bottom of the hot air chamber, and a coal discharge valve is arranged between the coal outlet hopper and the hot air chamber.
8. The coal sample fluidized drying device of claim 7, wherein: an air permeable plate structure with dense holes is adopted between the hot air chamber and the fluidization chamber, and the air permeable plate is rotatably supported between the hot air chamber and the fluidization chamber through a rotating cylinder.
9. The coal sample fluidized drying device of claim 8, wherein: the coal discharging device is characterized by further comprising a control unit, wherein the gate valve, the coal discharging valve and the rotary cylinder are respectively in control connection with the control unit, the gate valve is provided with an actuator, and the gate valve is connected with the control unit through the actuator.
10. The coal sample fluidized drying device of claim 9, wherein: the dust removal unit adopts a sintered filter element, is arranged in the settling chamber and is positioned at the top of the settling chamber and used for filtering the settled hot air.
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| CN202020382985.XU CN211823488U (en) | 2020-03-24 | 2020-03-24 | Coal sample fluidized drying device |
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| CN202020382985.XU CN211823488U (en) | 2020-03-24 | 2020-03-24 | Coal sample fluidized drying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238171A (en) * | 2020-03-24 | 2020-06-05 | 南京国电环保科技有限公司 | Coal sample fluidized drying device |
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2020
- 2020-03-24 CN CN202020382985.XU patent/CN211823488U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238171A (en) * | 2020-03-24 | 2020-06-05 | 南京国电环保科技有限公司 | Coal sample fluidized drying device |
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