CN113790579A - Vacuum drying dehydration device and gasification furnace system - Google Patents
Vacuum drying dehydration device and gasification furnace system Download PDFInfo
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- CN113790579A CN113790579A CN202111159319.5A CN202111159319A CN113790579A CN 113790579 A CN113790579 A CN 113790579A CN 202111159319 A CN202111159319 A CN 202111159319A CN 113790579 A CN113790579 A CN 113790579A
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- gate valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
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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
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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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
- F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
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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
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
Abstract
The invention provides a vacuum drying dehydration device and a gasification furnace system, and relates to the technical field of coal chemical industry. The vacuum drying dehydration device comprises a hopper, a gas-liquid separation component and a gas-liquid conveying pipeline, wherein a partition plate is arranged in the hopper to divide the hopper into a first hopper and a second hopper; the hopper is divided into two independent compartments, namely a first hopper and a second hopper, the two small hoppers are sealed by a top gate valve and a bottom gate valve, the top gate valve is opened to convey slag materials output from a feed opening of the gasification furnace into the first hopper or the second hopper, and an adjusting valve corresponding to a gas-liquid conveying pipeline is opened to perform vacuum pumping by a vacuum pump under the heating condition so as to perform the process of vacuum drying and dehydration; and after the dehydration is finished, opening the bottom gate valve to discharge the solid slag. The first hopper and the second hopper are alternately and circularly used to match the continuous operation of the slag conveyor, the dehydration is efficient, the occupied area of the device is small, and the operation cost is low.
Description
Technical Field
The invention relates to the technical field of coal chemical industry, in particular to a vacuum drying dehydration device and a gasification furnace system.
Background
At present, the slag tapping gasifier is widely applied to coal chemical enterprises, can improve the utilization efficiency of coal, and reduces the discharge amount of pollutants. However, the liquid-carrying waste slag generated after gasification has a certain negative influence on the ecological environment. Because the water content in the slag is higher, the slag is continuously drained in the loading process, the environment of a slag water loading area is poor, and a large amount of water resources are wasted. In addition, in the process of slag car transportation, black water is continuously leached out, so that the ground of the slag transportation road is locally collapsed, and the transportation road and the surrounding environment are seriously influenced.
In order to reduce the water content in the coarse slag, most enterprises adopt methods such as a sedimentation method, a classification or high-frequency vibration screening method, a high-temperature drying and heating method, an airing method and the like to carry out coarse slag dehydration, and the method specifically comprises the following steps:
the sedimentation method is adopted, sediment pools in a plurality of areas need to be built, coarse slag generated in the gasification furnace is subjected to sedimentation dehydration in different sedimentation pools, the coarse slag in the last sediment pool is grabbed out by a grab bucket, and the coarse slag dehydration work is completed. The method has large floor area, long settling time and poor dewatering effect.
The classification or high-frequency vibration sieve method is generally divided into two-stage dehydration, including primary vibration sieve dehydration and secondary vibration sieve dehydration, and a coarse slag buffer tank, a belt conveyor and the like are required to be arranged in the middle process.
The high-temperature drying and heating method adopts high-temperature steam or hot air for direct heating and drying, and the method needs a large-scale blower and heating equipment, so that the operation energy consumption and the cost are higher, and the occupied area is larger.
In view of this, the present application is presented.
Disclosure of Invention
The invention aims to provide a vacuum drying dehydration device and a gasification furnace system, which can obviously improve the efficiency of coarse slag dehydration of a gasification furnace, and have small floor area and low operation cost.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a vacuum drying dehydration device, which comprises a hopper, a gas-liquid separation component and a gas-liquid conveying pipeline, wherein a partition plate is arranged in the hopper to divide the hopper into a first hopper and a second hopper;
the first hopper and the second hopper respectively comprise a hopper main body with openings at the top and the bottom, a top gate valve for sealing the top of the hopper main body and a bottom gate valve for sealing the bottom of the hopper main body, the openings at the top of the hopper main bodies of the first hopper and the second hopper are respectively opposite to the feed opening of the gasification furnace, and the top gate valve and the bottom gate valve are respectively detachably connected with the hopper main body;
the gas-liquid separation assembly comprises a gas-liquid separation tank and a vacuum pump connected with the top of the gas-liquid separation tank, the gas-liquid conveying pipeline comprises a first gas-liquid conveying pipeline and a second gas-liquid conveying pipeline, an inlet of the first gas-liquid conveying pipeline is communicated with the first hopper, an inlet of the second gas-liquid conveying pipeline is communicated with the second hopper, and outlets of the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline are communicated with an inlet of the gas-liquid separation tank; the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline are both provided with regulating valves;
the hopper is provided with a heater for heating the first hopper and the second hopper.
In an alternative embodiment, the height of the other end surface of the first hopper opposite to the partition plate is higher than that of the partition plate, and the height of the other end surface of the second hopper opposite to the partition plate is higher than that of the partition plate, so that the top end surface of the hopper is in a shape with a lower middle and two higher sides.
In an optional embodiment, the inlet end of the first gas-liquid conveying pipeline extends into the first hopper from a bottom gate valve on the first hopper, and the inlet end of the second gas-liquid conveying pipeline extends into the second hopper from a bottom gate valve on the second hopper; the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline both comprise vertical hoses, and regulating valves on the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline are both located between the vertical hoses and the bottom gate valves.
In an alternative embodiment, the bottom and top gate valves on the first and second hoppers each include a valve plate for acting as a closure;
all be provided with the curb plate that sets up around the valve plate on two bottom gate valves, be provided with the filter screen on the roof of curb plate, curb plate and valve plate form the filtrate groove that is used for holding filtrating.
In an alternative embodiment, the bottom and top gate valves on the first and second hoppers each include a drive for driving a valve plate to control the opening or closing of the bottom and top gate valves.
In an alternative embodiment, the valve plates of the bottom gate valve and the top gate valve are provided with a sealing member for sealing connection with the top or the bottom of the hopper.
In an alternative embodiment, the heater comprises a heating coil disposed around the hopper bodies on the first and second hoppers.
In an alternative embodiment, the gas-liquid separation device further comprises a filtrate pump, and the feed end of the filtrate pump is connected with the bottom of the gas-liquid separation tank.
In an optional implementation mode, the device further comprises a controller, a liquid level detection mechanism is further arranged on the gas-liquid separation tank, the liquid level detection mechanism is in communication connection with the controller, and the filtrate pump and the vacuum pump are electrically connected with the controller, so that the controller controls the filtrate pump and the vacuum pump to work according to detected liquid level information.
In a second aspect, the invention provides a gasification furnace system comprising the vacuum drying dehydration device of any one of the previous embodiments.
The embodiment of the invention has the following beneficial effects: the hopper is divided into two independent compartments, namely a first hopper and a second hopper, the two small hoppers are sealed by a top gate valve and a bottom gate valve, the top gate valve is opened to convey slag materials output from a feed opening of the gasification furnace into the first hopper or the second hopper, and when the top gate valve and the bottom gate valve are in a sealed state, a regulating valve corresponding to a gas-liquid conveying pipeline is opened, so that the process of vacuum drying and dehydration can be carried out by utilizing a vacuum pump under the heating condition; and after the dehydration is finished, opening the bottom gate valve to discharge the solid slag. Through first hopper and the alternate recycling of second hopper to match the continuous operation of dragveyer, connect the material to realize the complete sealing of hopper through two little hoppers batch intermittent type, improved vacuum effect greatly. Therefore, the vacuum drying dehydration device provided by the invention has the advantage of high dehydration efficiency, and the device has the advantages of small occupied area, low operation cost and good market application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a vacuum drying dehydration device provided by an embodiment of the present invention;
fig. 2 is a schematic structural view of the hopper of fig. 1.
Icon: 100-a vacuum drying dehydration device; 110-a hopper; 111-a first hopper; 112-a second hopper; 113-a divider plate; 114-a hopper body; 115-top gate valve; 116-bottom gate valve; 117-filter screen; 118-a filtrate tank; 101-a valve plate; 102-a side plate; 120-a heater; 121-inlet of heating source; 122-heating heat source outlet; 130-gas-liquid conveying pipeline; 131-a first gas-liquid conveying pipeline; 132-a second gas-liquid delivery line; 133-vertical hose; 134-a regulating valve; 140-a gas-liquid separation module; 141-a gas-liquid separation tank; 142-a vacuum pump; 143-filtrate pump; 144-a water vapor discharge pipe; 145-filtrate recovery tube; 146-a liquid level detection mechanism; 150-slag car; 001-feed opening.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, the present embodiment provides a vacuum drying dehydration apparatus 100, which includes a hopper 110, a heater 120, a gas-liquid conveying pipeline 130 and a gas-liquid separation assembly 140, wherein the hopper 110 is configured to receive slag with liquid output from a feed opening 001 of a gasification furnace, the heater 120 is used to heat the hopper 110, the gas-liquid conveying pipeline 130 is used to convey gas-liquid materials to the gas-liquid separation assembly 140 for gas-liquid separation, and a vacuum pump 142 can be used to evacuate the hopper 110, so as to implement a process of vacuum drying dehydration.
The vacuum drying dehydration is to utilize the boiling point of the water in the material to be reduced under the vacuum condition, and a large amount of water is discharged through a vacuum system after being subjected to vaporization phase change under the heating condition, so that the water content of the coarse slag material can be greatly reduced, and the dry slag discharge is realized.
The hopper 110 is internally provided with a partition plate 113 to divide the hopper 110 into a first hopper 111 and a second hopper 112, and the two small hoppers 110 can be regarded as two compartments, and the two compartments are controlled to be alternately recycled to match the continuous operation of the slag conveyor, so that the coarse slag dewatering efficiency is obviously improved. Since the two small hoppers 110 need to be vacuumized separately in the process, the two small hoppers 110 need to be completely sealed.
Further, the first hopper 111 and the second hopper 112 each include a hopper main body 114 having openings at the top and the bottom, a top gate valve 115 for capping the top of the hopper main body 114, and a bottom gate valve 116 for capping the bottom of the hopper main body 114, the openings at the top of the hopper main bodies 114 of the first hopper 111 and the second hopper 112 each face the feed opening 001 of the gasification furnace, and the top gate valve 115 and the bottom gate valve 116 are detachably connected to the hopper main body 114. The two small hoppers are sealed through a top gate valve 115 and a bottom gate valve 116, the top gate valve 115 is opened, slag output from a gasification furnace feed opening 001 can be conveyed into the first hopper 111 or the second hopper 112, when the top gate valve 115 and the bottom gate valve 116 are sealed, a regulating valve 134 corresponding to the gas-liquid conveying pipeline 130 is opened, and the process of vacuum drying and dehydration can be performed by vacuumizing through a vacuum pump under the heating condition; after the dehydration is finished, the bottom gate valve is opened to discharge the solid slag (the solid slag can be discharged into the slag car 150 below). The first hopper 111 and the second hopper 112 are alternately recycled to match the continuous operation of the dragveyer.
Specifically, when the top gate valve 115 and the bottom gate valve 116 are used for covering the hopper body 114, each group needs to be sealed to perform the operation of vacuumizing the first hopper 111 and the second hopper 112. The overall shape of the hopper body 114 is not limited and may be a hexahedral structure as shown in the drawings.
In some embodiments, referring to fig. 1 and 2, the height of the other end surface of the first hopper 111 opposite to the partition plate 113 is higher than the height of the partition plate 113, and the height of the other end surface of the second hopper 112 opposite to the partition plate 113 is higher than the height of the partition plate 113, so that the top end surface of the hopper 110 is in a shape with a lower middle and two higher sides. Thus, when the first hopper 111 is in a sealed state for vacuum-pumping operation, only the top gate valve 115 on the second hopper 112 is opened for feeding, and the slag falling on the top gate valve 115 on the first hopper 111 falls into the second hopper 112 under the action of gravity, so that only a single small hopper feeds the slag.
In some embodiments, the bottom and top gate valves 116, 115 on the first and second hoppers 111, 112 each include a valve plate 101 for functioning as a closure, the shape and size of the valve plate 101 matching the inlet and outlet shapes of the hopper body 114 to enable a complete seal when closed. Therefore, to increase the sealing effect, the valve plates 101 of the bottom gate valve 116 and the top gate valve 115 are provided with a sealing member (not shown), such as a sealing strip, for sealing connection with the top or bottom of the hopper 110.
In some embodiments, the bottom and top gate valves 116, 115 on the first and second hoppers 111, 112 each include a drive (not shown) for driving the valve plate 101 to control the opening or closing of the bottom and top gate valves 116, 115. The driving member can be a common air cylinder and the like, and can control the opening and the closing of the bottom gate valve 116 and the top gate valve 115.
Further, in order to better realize the separation of solid and liquid, the valve plates 101 on the two bottom gate valves 116 are respectively provided with a side plate 102 arranged around the valve plates 101, the top wall of the side plate 102 is provided with a filter screen 117, and the side plate 102 and the valve plates 101 form a filtrate tank 118 for containing filtrate. The solid-liquid separation of the slag from the feed opening 001 is realized in the two small hoppers, the solid is on the filter screen 117, the liquid falls into the filtrate groove 118 below, the liquid can be output through the gas-liquid conveying pipeline 130, and the solid slag on the filter screen 117 can be discharged into the slag car 150 when the bottom gate valve 116 is opened.
Specifically, the filter screen 117 may be separated by a CDcd surface, and divided into two filter screens; the filtrate tank 118 is also separated by the CDcd surface and is divided into two tanks, and the filtrate tank 118, the filter screen 117 and the valve plate 101 jointly form a bottom gate valve 116, namely M3 and M4.
The heater 120 is used for heating the first hopper 111 and the second hopper 112, and may be a general electric heating device, and the specific structure is not limited.
In some embodiments, the heater 120 comprises a heating coil disposed about the hopper body 114 on the first and second hoppers 111, 112, the heating coil having a heating heat source inlet 121 and a heating heat source outlet 122, the heat source being input from the heating heat source inlet 121 and output from the heating heat source outlet 122 after heat exchange through the hopper 110. Indirect heating with hot air, hot water or steam may be used, with low pressure steam and hot water being preferred.
The gas-liquid separation assembly 140 comprises a gas-liquid separation tank 141 and a vacuum pump 142 connected with the top of the gas-liquid separation tank 141, the gas-liquid conveying pipeline 130 comprises a first gas-liquid conveying pipeline 131 and a second gas-liquid conveying pipeline 132, the inlet of the first gas-liquid conveying pipeline 131 is communicated with the first hopper 111, the inlet of the second gas-liquid conveying pipeline 132 is communicated with the second hopper 112, and the outlets of the first gas-liquid conveying pipeline 131 and the second gas-liquid conveying pipeline 132 are both communicated with the inlet of the gas-liquid separation tank 141; the first gas-liquid conveying pipeline 131 and the second gas-liquid conveying pipeline 132 are both provided with a regulating valve 134. The evacuation of the first hopper 111 or the second hopper 112 can be regulated by regulating the opening and closing of the two regulating valves 134, typically, the two regulating valves 134 are in an open-closed state.
In some embodiments, the inlet end of the first gas-liquid conveying pipeline 131 extends into the first hopper 111 from the bottom gate valve 116 on the first hopper 111, and the inlet end of the second gas-liquid conveying pipeline 132 extends into the second hopper 112 from the bottom gate valve 116 on the second hopper 112; the first gas-liquid conveying pipeline 131 and the second gas-liquid conveying pipeline 132 both comprise a vertical hose 133, and the regulating valves 134 on the first gas-liquid conveying pipeline 131 and the second gas-liquid conveying pipeline 132 are both positioned between the vertical hose 133 and the bottom gate valve 116. The vertical hose 133 can move along with the bottom gate valve 116 when the bottom gate valve 116 is opened, so that the operation is convenient. Specifically, the first gas-liquid conveying pipe 131 and the second gas-liquid conveying pipe 132 may communicate with the inlet of the gas-liquid separation tank 141 through a length of a header pipe.
In some embodiments, the gas-liquid separation module 140 further comprises a filtrate pump 143, and a feed end of the filtrate pump 143 is connected to a bottom of the gas-liquid separation tank 141. Thus, the gas output from the top of the gas-liquid separation tank 141 is conveyed by the vacuum pump 142 and is vented or recovered by the vapor discharge pipe 144; the filtrate separated by the gas-liquid separation tank 141 is output by the filtrate pump 143 and returned to the apparatus through the filtrate recovery pipe 145 to be recycled, so that the water resource consumption of the apparatus is reduced, and the energy-saving effect is achieved.
In some embodiments, the gas-liquid separation assembly 140 further includes a controller, the gas-liquid separation tank 141 is further provided with a liquid level detection mechanism 146, and may further be provided with a liquid level alarm mechanism in a matching manner, the liquid level detection mechanism 146 is in communication connection with the controller, and the filtrate pump 143 and the vacuum pump 142 are electrically connected with the controller, so that the controller controls the operation of the filtrate pump 143 and the vacuum pump 142 according to the detected liquid level information. When the gas-liquid separation tank 141 is at a high liquid level, the controller controls the vacuum pump 142 to stop working, the filtrate pump 143 is started, and the filtrate is returned to the device through the filtrate recovery pipe 145 for recycling; when the filtrate in the gas-liquid separation tank 141 is at a low liquid level, the controller controls the filtrate pump 143 to stop working, and the vacuum pump 142 is started to perform normal vacuum drying and dewatering operation.
The technical route of the vacuum drying dehydration device 100 is as follows: the hopper 110 is used for receiving the liquid-carrying material from the feed opening 001, heating the material by a heating coil and vacuumizing the vacuum pump 142, and then carrying out vaporization phase change on moisture in the heated material under high temperature and vacuum conditions (the conditions are not satisfactory, otherwise, the moisture in the pores of the material is difficult to carry out vaporization phase change), and after water vapor passes through the filter screen 117, the vertical hose 133 and the connecting pipeline thereof, the water vapor enters the gas-liquid separation tank 141 for separation, the separated gas is emptied or recycled by the vacuum pump 142 and the water vapor discharge pipe 144, and the separated filtrate is sent to the device for recycling by the filtrate pump 143 and the filtrate recycling pipe 145.
More specifically, the gate valve M1 on the ABCD plane, the gate valve M2 on the CDEF plane, the gate valve M3 on the ABCD plane, the gate valve M3 on the CDEF plane, and the gate valves M1 and M2 are arranged in an inward slope, so that the materials can be conveniently collected; the gate valves M3 and M4 are horizontally arranged (non-slope hopper), so that the contact area between the bottom filter screen and the materials in the hopper is enlarged, namely the vacuumizing area of the bottom materials is increased, and the vacuumizing and dehydrating effects are enhanced. A description of the process carried out for one working cycle in connection with each valve plate:
(1) under the circumstances of hopper 110, each connecting tube and gas-liquid separation jar 141 evacuation, open the governing valve 134 of first hopper 111 below, open vacuum pump 142, open push-pull valve M1 and connect material (other push-pull valves keep closing), open heating coil heat source, at the continuous in-process of receiving material of BDbd compartment, heating coil continuously heats the material, and vacuum pump 142 continuously evacuates the material in to first hopper 111 simultaneously, tentatively deviates from the moisture in the material.
(2) Under the condition that BDbd compartment material was received fully, close push-pull valve M1, open push-pull valve M2 and receive the material to the DFdf compartment, BDbd compartment is totally enclosed space this moment, along with the operation of vacuum pump, carry out the evacuation (opening the governing valve 134 of BDbd compartment below, close another valve) to BDbd compartment, negative pressure can descend fast in the space, moisture in the material can produce the phase transition fast under the high temperature condition and vaporize, a large amount of steam passes filter screen 117 and gets into gas-liquid separation jar 141 and separate, the moisture of desorption is collected in gas-liquid separation jar 141 temporarily.
(3) During the vacuum drying dehydration of the BDbd compartment material, the DFdf compartment material is also collected, at which time the regulating valve 134 below the DFdf compartment is opened to close the other valve, and at which time the vacuum system starts to vacuum dry dehydrate the DFdf compartment material. Meanwhile, the gate valve M3 is opened to discharge the material dehydrated by the BDbd compartment into the slag car 150, and after the discharge is finished, the gate valve M1 is opened and the M2 is closed, namely, the next circulating material receiving, heating and vacuum drying process of the BDbd compartment is started.
An embodiment of the present invention provides a gasification furnace system, which includes the vacuum drying dehydration apparatus 100 according to any one of the foregoing embodiments, and may further include a gasification furnace and other devices.
Application example 1
Taking a certain coal-to-methanol device as an example, the device adopts a dry coal powder gasification technology in a gasification system, and adopts a liquid-state slag discharge technology in a gasification furnace. The original design is that the coarse slag generated by the gasification furnace is fished out by the slag dragging machine and is continuously discharged from the feed opening 001, and the water content of the discharged coarse slag is 40 percent. In the processes of slag discharge and vehicle transportation, a large amount of water is scattered on the ground, so that the factory and road environment is polluted, and the waste of water resources is also caused.
After technical improvement is carried out by adopting the technical scheme of the application, the operation is as follows:
firstly, opening a gate valve M1, closing the gate valve M2/M3/M4, feeding the coarse slag fished out by a slag salvaging machine into a hopper of a BDbd compartment for receiving the coarse slag, simultaneously enabling an inlet of a heating coil to be the same as the steam condensate of a field device, opening a condensate valve, and heating the material in the hopper by using the steam condensate of the field device. Open governing valve 134 under the DFdf compartment, open vacuum pump 142, at the BDbd compartment in-process that lasts the receipts material, heating coil lasts the heating to the material, vacuum pump 142 lasts the evacuation to the material simultaneously, deviates from moisture in the material tentatively.
Setting program control time or under the condition that the BDbd compartment is full of materials, closing a gate valve M1, opening a gate valve M2 to receive the DFdf compartment, wherein the BDbd compartment is a fully-closed space, negative pressure in the space can be rapidly reduced (about 70kpa) along with the operation of a vacuum pump, moisture in the materials is rapidly vaporized and evaporated under the conditions of negative pressure and high temperature, a large amount of water vapor passes through a filter screen 117 and enters a gas-liquid separation tank 141 to be separated, and the removed moisture is collected in the gas-liquid separation tank 141. Meanwhile, the water vapor discharge pipe 144 of the vacuum pump is communicated with the top of the black water pool of the slag conveyor, and a small amount of moisture which is not separated is discharged into the black water side of the slag conveyor along with the water vapor discharge pipe 144 of the vacuum pump, so that water resources are recovered to the maximum extent, and meanwhile, the random discharge phenomenon of field waste gas is avoided.
During the vacuum drying dehydration of the BDbd compartment materials, the DFdf compartment materials are also collected (the collection process is automatically controlled by a time program and is about 30min), at this time, the regulating valve 134 below the DFdf compartment is opened to close the other valve, and at this time, the vacuum system starts to perform vacuum drying dehydration on the DFdf compartment materials. Meanwhile, the gate valve M3 is opened to discharge the material dehydrated by the BDbd compartment to the slag car 150, and after the discharge is finished, the gate valve M1 is opened and the M2 is closed, namely, the next circulating material receiving, heating and vacuum drying process of the BDbd compartment is started. Thereby performing a cycle. Therefore, the moisture content of the crude slag after moisture removal can be guaranteed to be below 10%, the crude slag is sent out by the slag car 150 for treatment, water does not fall in the transportation process, and the method is clean and environment-friendly.
In addition, gas and liquid after vacuum dehydration are mixed and enter the gas-liquid separation tank 141, a liquid level alarm and trigger switch is arranged on the gas-liquid separation tank 141, when the gas-liquid separation tank 141 is at a high liquid level (the liquid level is more than 80%), the system automatically stops the vacuum pump 142, the filtrate pump 143 is started, filtrate is returned to a black water pool of the slag conveyor through the filtrate recovery pipe 145 for recycling, and the water resource consumption of the device is reduced; when the filtrate in the gas-liquid separation tank 141 is at a low liquid level (the liquid level is less than 15%), the system automatically stops the filtrate pump 143, starts the vacuum pump 142, and performs normal vacuum drying and dehydration operation.
Tests show that the treated coarse slag has low water content and low equipment investment and operation cost, simultaneously recovers a large amount of water, realizes closed cycle use and recovery of a water path, is efficient and environment-friendly, and simultaneously has clean field production environment and improves the field civilized production level.
To sum up, the embodiment of the invention provides a vacuum drying dehydration device and a gasification furnace system, which are a dehydration system integrating vacuum and heating drying into a whole, and avoid the operation defects of the conventional sedimentation, vibrating screen or high-temperature drying and other modes, compared with the prior art, the invention has the following technical advantages:
(1) in general operating factories, the heat sources are rich in hot water with the temperature of 70-100 ℃, condensate or steam with higher temperature, and the partial heat sources have no utilization and recovery value in many factories, so most of the heat sources are discharged on site.
(2) Through dividing into two compartments with the hopper, two compartments carry out circulation treatment to the liquid-carrying waste solid that discharges, can realize that single compartment realizes the full-enclosed at the dehydration in-process, have guaranteed the vacuum and the temperature of hopper, have improved vacuum and heating mummification effect, have also realized simultaneously and have connect material work in succession.
(3) The design of the feeding port and the discharging port of the hopper is superior to that of the traditional hopper, and the feeding port of the hopper is inclined inwards by adopting a slope, so that the receiving of materials is facilitated; the discharge gate adopts planar design (conventional discharge gate is the toper down), has increased the contact surface of dehydration material with the evacuation, prevents that the material from excessively piling up upwards and reducing vacuum effect.
(4) The application has the following outstanding advantages: according to the principle that the pressure is reduced and the boiling point of water is reduced, the space pressure is reduced in a closed space for processing materials while the temperature of the liquid and the waste solid is increased, negative pressure is formed, so that the moisture carried on the surface of the materials and the internal water in gaps of the materials are subjected to phase change vaporization, and the purpose of efficiently removing the moisture is achieved.
(5) Compared with the traditional process, the automatic operation control of the gas-liquid separation tank and the recycling of water resources are enhanced. The liquid level control and interlocking switch is arranged on the gasification separating tank, and signals are connected with the vacuum pump and the motor of the filtrate pump. When the gas-liquid separation tank is at a high liquid level, the system automatically stops the vacuum pump, starts the filtrate pump, and returns the filtrate to the device through the filtrate recovery pipe for recycling, so that the water resource consumption of the device is reduced; when the filtrate in the gas-liquid separation tank is at a low liquid level, the system automatically stops the filtrate pump, starts the vacuum pump and performs normal vacuum drying and dewatering operation.
(6) The equipment of the application is simple in design, complex procedures such as primary dehydration and secondary dehydration of conventional technologies do not exist, occupied space is small, and extra large-scale equipment is not added. The water content of the treated coarse slag is low, the equipment investment and the operation cost are low, a large amount of water is recycled, and the method is efficient and environment-friendly.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A vacuum drying dehydration device is characterized by comprising a hopper, a gas-liquid separation component and a gas-liquid conveying pipeline, wherein a partition plate is arranged in the hopper to divide the hopper into a first hopper and a second hopper;
the first hopper and the second hopper respectively comprise a hopper main body with openings at the top and the bottom, a top gate valve for sealing the top of the hopper main body and a bottom gate valve for sealing the bottom of the hopper main body, the openings at the top of the hopper main bodies of the first hopper and the second hopper are respectively opposite to the feed opening of the gasification furnace, and the top gate valve and the bottom gate valve are respectively detachably connected with the hopper main body;
the gas-liquid separation assembly comprises a gas-liquid separation tank and a vacuum pump connected with the top of the gas-liquid separation tank, the gas-liquid conveying pipeline comprises a first gas-liquid conveying pipeline and a second gas-liquid conveying pipeline, an inlet of the first gas-liquid conveying pipeline is communicated with the first hopper, an inlet of the second gas-liquid conveying pipeline is communicated with the second hopper, and outlets of the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline are both communicated with an inlet of the gas-liquid separation tank; the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline are both provided with regulating valves;
the hopper is provided with a heater for heating the first hopper and the second hopper.
2. The vacuum drying dehydration device of claim 1, characterized in that the height of the other end surface of the first hopper opposite to the partition plate is higher than the height of the partition plate, and the height of the other end surface of the second hopper opposite to the partition plate is higher than the height of the partition plate, so that the top end surface of the hopper is in a shape with a lower middle and two higher sides.
3. The vacuum drying dehydration device of claim 1, wherein the inlet end of the first gas-liquid conveying pipeline extends into the first hopper from the bottom gate valve on the first hopper, and the inlet end of the second gas-liquid conveying pipeline extends into the second hopper from the bottom gate valve on the second hopper; the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline both comprise vertical hoses, and the regulating valves on the first gas-liquid conveying pipeline and the second gas-liquid conveying pipeline are both located between the vertical hoses and the bottom gate valve.
4. The vacuum drying dehydration device of any of claims 1-3 characterized in that said bottom gate valve and said top gate valve on said first hopper and said second hopper each comprise a valve plate for functioning as a cover;
two on the bottom push-pull valve all be provided with on the valve plate around the curb plate that the valve plate set up, be provided with the filter screen on the roof of curb plate, the curb plate with the valve plate forms the filtrate groove that is used for holding filtrating.
5. The vacuum drying dehydration device of claim 4 characterized in that said bottom gate valve and said top gate valve on said first hopper and said second hopper each comprise a drive for driving said valve plate to control said bottom gate valve and said top gate valve to open or close.
6. The vacuum drying dehydration device of claim 4 characterized in that said valve plates of said bottom gate valve and said top gate valve are each provided with a sealing member for sealing connection with the top or bottom of said hopper.
7. The vacuum drying dehydration apparatus of claim 1 wherein said heater comprises a heating coil disposed around said hopper body on said first hopper and said second hopper.
8. The vacuum drying dehydration device of claim 1 further comprising a filtrate pump, wherein the feed end of the filtrate pump is connected with the bottom of the gas-liquid separation tank.
9. The vacuum drying dehydration device according to claim 8, further comprising a controller, wherein a liquid level detection mechanism is further disposed on the gas-liquid separation tank, the liquid level detection mechanism is in communication connection with the controller, and the filtrate pump and the vacuum pump are electrically connected with the controller, so that the controller controls the filtrate pump and the vacuum pump to operate according to the detected liquid level information.
10. A gasifier system comprising the vacuum drying dehydration apparatus of any of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111159319.5A CN113790579A (en) | 2021-09-30 | 2021-09-30 | Vacuum drying dehydration device and gasification furnace system |
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| CN202111159319.5A CN113790579A (en) | 2021-09-30 | 2021-09-30 | Vacuum drying dehydration device and gasification furnace system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474819A (en) * | 2022-01-12 | 2022-05-13 | 中国矿业大学 | Device and method for quickly dehydrating coal gasification fine slag and demolding molded blocks by continuously applying vacuum force and pressure |
| CN114669233A (en) * | 2022-04-20 | 2022-06-28 | 北京干雾科技有限公司 | Device and method for mixed utilization of pebble coal and coal gasification fine slag |
-
2021
- 2021-09-30 CN CN202111159319.5A patent/CN113790579A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474819A (en) * | 2022-01-12 | 2022-05-13 | 中国矿业大学 | Device and method for quickly dehydrating coal gasification fine slag and demolding molded blocks by continuously applying vacuum force and pressure |
| CN114669233A (en) * | 2022-04-20 | 2022-06-28 | 北京干雾科技有限公司 | Device and method for mixed utilization of pebble coal and coal gasification fine slag |
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