CN217677258U - Device for drying sludge by using flue gas - Google Patents
Device for drying sludge by using flue gas Download PDFInfo
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- CN217677258U CN217677258U CN202221040665.1U CN202221040665U CN217677258U CN 217677258 U CN217677258 U CN 217677258U CN 202221040665 U CN202221040665 U CN 202221040665U CN 217677258 U CN217677258 U CN 217677258U
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Abstract
The utility model relates to the technical field of sludge treatment, and discloses a device for drying sludge by using flue gas, which comprises a drying tower, a flue gas conveying device and a coal grinding device, wherein an atomization unit is arranged in the drying tower and is used for atomizing wet sludge into sludge droplets, and a flue gas inlet is arranged on one side of the drying tower, which is close to the bottom; the flue gas conveying device is communicated with a flue gas inlet of the drying tower so that flue gas enters the drying tower to dry the sludge liquid drops; and the coal grinding device is communicated with the drying tower and is used for receiving and treating the dried sludge. The utility model has simple and practical process flow and remarkable energy-saving effect, and can effectively realize the fuel utilization of the sludge; dry mud directly gets into the coal pulverizer simultaneously, and the reducible pollution to the factory environment realizes the clean utilization of mud, the utility model discloses have potential scale industrial application prospect.
Description
Technical Field
The utility model relates to a sludge treatment technical field especially relates to a device of dry mud of flue gas.
Background
Due to the rapid growth of urban population and the rapid development of industrialization, a large amount of urban domestic sewage and industrial wastewater are generated, the yield of sludge serving as an accessory product of a sewage treatment plant is increased year by year, the sludge treatment burden of the sewage treatment plant is increased, and meanwhile, huge pollution and damage are generated to the ecological environment where human lives. The sludge has the characteristics of high water content, fine particles, small specific gravity, large volume and the like, and is difficult to treat, and the sludge contains a large amount of organic fragments, bacterial thalli, heavy metals, inorganic particles, colloids and the like, so that the secondary pollution is caused to the treatment of the sludge, and the like. Therefore, the development of a novel sludge treatment technology and the realization of reduction, harmlessness and resource utilization of sludge treatment become important research directions for developing low-carbon economy at present.
At present, the sludge heat treatment utilization is one of the mature technical processes in various sludge treatment methods, can achieve the reduction, the harmlessness and the stabilization of the sludge to a greater extent, and can utilize the low calorific value of the sludge. However, the sludge pre-drying treatment needs to consume a large amount of heat, and can generate secondary pollution such as harmful gas and residues, so that the problems of high cost, high energy consumption, difficult treatment of secondary pollution and the like are caused. Therefore, how to realize the resource utilization of the sludge with high water content in an energy-saving, effective and clean manner is very important.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, provide a device of dry mud of flue gas to utilize the flue gas waste heat to carry out the drying to mud, and directly send into the mud after the drying and grind in the coal grinding device, send to the furnace burning, realize resourceization, the clean utilization of mud.
The utility model adopts the technical proposal that: a device for drying sludge by using flue gas comprises
The drying tower is internally provided with an atomization unit for atomizing wet sludge into sludge droplets, and one side of the drying tower, which is close to the bottom, is provided with a flue gas inlet;
the flue gas conveying device is communicated with a flue gas inlet of the drying tower so that flue gas enters the drying tower to dry the sludge liquid drops;
and the coal grinding device is communicated with the drying tower and is used for receiving and treating the dried sludge.
Preferably, in the device for drying sludge by using flue gas, a heat exchange unit is further arranged in the drying tower, the heat exchange unit is located at the bottom of the atomization unit, and the heat exchange unit is communicated with the flue gas conveying device.
Preferably, in the device for drying sludge by using flue gas, a sludge receiving unit is further arranged in the drying tower, the sludge receiving unit is positioned at the bottom of the heat exchange unit, and the sludge receiving unit is communicated with the coal grinding device through a pneumatic conveying pump.
Preferably, in the device for drying sludge by using flue gas, an atomizing nozzle is arranged in the atomizing unit, and the atomizing nozzle is fixed at the top of the drying tower;
further preferably, the atomizing nozzle is a gas-liquid two-phase flow atomizing nozzle, and the atomizing nozzle is connected with a gas storage tank.
Preferably, in the device for drying sludge by using flue gas, a spraying tray is arranged at the bottom of the atomizing nozzle, and a plurality of small holes are formed in the spraying tray.
Preferably, in the device for drying sludge by using flue gas, the top of the drying tower is connected with a dust removal device for treating the flue gas after heat exchange.
Preferably, in the above device for drying sludge by flue gas, the dust removing device is a bag-type dust remover.
Preferably, in the above apparatus for drying sludge by using flue gas, the coal mill includes a coal dropping pipe and a coal mill, and the sludge receiving unit enters the coal mill through the coal dropping pipe to mix with raw coal.
Preferably, in the above device for drying sludge by using flue gas, the flue gas conveying device includes an electrostatic precipitator, and the electrostatic precipitator is communicated with the flue gas inlet of the drying tower.
Preferably, in the above apparatus for drying sludge by flue gas, the electrostatic precipitator is in communication with an outlet of the denitrification reactor.
The utility model provides a device of dry mud of flue gas, compared with the prior art, its beneficial effect lies in:
(1) The wet sludge and the compressed air are fully atomized into liquid drops with small particle size in the atomizing nozzle, and the liquid drops and the waste heat smoke gas from the upstream in a countercurrent manner are subjected to heat and mass transfer; meanwhile, the porous spraying tray arranged below the atomizing nozzle increases the contact time of the flue gas and the sludge liquid drops, so that the heat exchange effect is more obvious; the dry sludge falls into the sludge receiving device under the action of gravity, is directly sent into a coal mill through a pneumatic conveying pump to be milled and powdered, and is sent into a hearth to be combusted, so that the environment of a plant area can be obviously improved;
(2) The utility model discloses the technological process that flue gas drying mud device involved is simple, practical, and energy-conserving effect is showing, can effectively realize resourceization, the clean utilization of mud, has potential large-scale industrial application prospect.
Drawings
FIG. 1 is a schematic view of the working flow of the sludge drying device for flue gas of the embodiment of the present invention.
In the figure:
1 is a wet sludge bin, 2 is a screw pump, 3 is an atomizing nozzle, 4 is a spraying tray, 5 is a drying tower, 6 is an electrostatic dust collector, 7 is a sludge receiving unit, 8 is a pneumatic conveying pump, 9 is a coal mill, 10 is a coal dropping pipe, 11 is a raw coal bin, 12 is a gas storage tank, 13 is a dust removal device, 14 is an atomizing unit, and 15 is a heat exchange unit.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to the attached figure 1, the embodiment of the utility model discloses a device of dry mud of flue gas, including drying tower 5, flue gas conveyor and coal grinding device.
Wherein, the drying tower 5 is internally provided with an atomizing unit 14, a heat exchange unit 15 and a sludge receiving unit 7 from top to bottom in sequence.
In some embodiments of the present invention, an atomizing nozzle 3 is disposed in the atomizing unit 14, the atomizing nozzle 3 is fixed to the top of the drying tower 5, and the atomizing nozzle 3 is connected to a gas storage tank 12 for introducing compressed air into the atomizing nozzle 3 to atomize wet sludge entering the drying tower 5 into sludge droplets;
specifically, the atomizing nozzle 3 may be a gas-liquid two-phase flow atomizing nozzle.
The bottom of the atomizing nozzle 3 is provided with a spraying tray 4 for separating an atomizing unit 14 and a heat exchange unit 15; and a plurality of small holes are formed in the spraying tray 4 and used for upwards discharging waste heat flue gas and dropping sludge liquid drops, and meanwhile, the spraying tray 4 can also bear partial sludge liquid drops, so that the contact time of the flue gas and the sludge liquid drops is prolonged, and the drying efficiency of wet sludge is improved.
The utility model discloses in some embodiments, the flue gas air inlet has been seted up to heat transfer unit 15 bottom one side, and heat transfer unit 15 passes through the flue gas air inlet and is connected with flue gas conveyor to make the flue gas get into in the drying tower 5, the mud liquid drop carries out heat exchange with the used heat flue gas at heat transfer unit 15.
The utility model discloses some embodiments, flue gas conveyor includes electrostatic precipitator 6, and the waste heat flue gas carries out heat exchange to drying tower 5 in through the pipe-line transportation after 6 processes of electrostatic precipitator.
Specifically, the source of the waste heat flue gas may be in equipment for generating the waste heat flue gas, such as a denitration reactor, and the like, and may be specifically determined according to actual conditions in a factory.
In some embodiments of the present invention, the sludge receiving unit 7 is located at the bottom of the drying tower 5 in a funnel shape, and is used for collecting the dry sludge which falls under the action of gravity and is subjected to heat exchange; the bottom of the sludge receiving unit 7 is provided with a sludge outlet which is connected with a coal grinding device, and dry sludge is conveyed into the coal grinding device through a pneumatic conveying pump 8.
The utility model discloses in some embodiments, 5 tops of drying tower are provided with the exhanst gas outlet, and the exhanst gas outlet communicates to dust collector 13, and the flue gas after the heat transfer carries out subsequent processing in proper order through the aperture, the exhanst gas outlet to dust collector 13 that spray tray 4.
Specifically, the dust removing device 13 may be a bag-type dust remover, and may be selectively replaced according to actual conditions.
The utility model discloses in some embodiments, the coal grinding device includes raw coal bunker 11, coal breakage pipe 10 and coal pulverizer 9, and in raw coal in the raw coal bunker 11 got into coal pulverizer 9 through coal breakage pipe 10, mud receiving element 7 carried dry mud to coal breakage pipe 10 through pneumatic conveying pump 8 simultaneously, and then got into in the coal pulverizer 9 and mix the milling powder with raw coal, sent into the furnace burning, and the effectual pollution of having avoided mud foul smell is showing and is improving the surrounding environment.
The utility model discloses above-mentioned device of dry mud of flue gas's working process does:
(1) Wet sludge enters a drying tower 5 from a wet sludge bin 1 through a screw pump 2, and is atomized by compressed air in an atomizing nozzle 3 to form sludge droplets with the particle size of 2-4 mm;
(2) Waste heat flue gas from a denitration reactor passes through an electrostatic dust collector 6 and then enters a drying tower 5 from a flue gas inlet from bottom to top, the waste heat flue gas and sludge liquid drops form counter flow, the waste heat flue gas and the sludge liquid drops exchange heat in a heat exchange unit 15, the flue gas after heat exchange passes through small holes in a spray tray 4 and then is discharged from the top of the drying tower 5, the flue gas enters a bag-type dust collector for subsequent treatment, and dried sludge falls into a sludge receiving unit 7 under the action of gravity;
(3) The dried sludge is conveyed to a coal dropping pipe 10 from a sludge receiving unit 7 through a pneumatic conveying pump 8, enters a coal mill 9 for milling and pulverizing, is mixed with raw coal and then is conveyed to a hearth for combustion and utilization.
To sum up, the embodiment of the utility model leads the waste heat flue gas from the outlet of the denitration reactor to enter the drying tower from bottom to top after passing through the electrostatic precipitator, so as to dry the wet sludge; pumping wet sludge to an atomizing nozzle through a screw rod, and atomizing in the atomizing nozzle through compressed air; a layer of porous spraying tray is arranged below the atomizing nozzle, so that gas-liquid contact time is prolonged, and gas flow is uniformly distributed; the dried sludge falls into a sludge receiving unit under the action of gravity, is directly conveyed to a coal dropping pipe through a pneumatic conveying pump, enters a coal mill to be milled into powder, and is conveyed into a hearth to be combusted. The utility model has simple and practical process flow and remarkable energy-saving effect, and can effectively realize the fuel utilization of the sludge; dry mud directly gets into the coal pulverizer simultaneously, and the reducible pollution to the factory environment realizes the clean utilization of mud, the utility model discloses have potential scale industrial application prospect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (9)
1. A device for drying sludge by flue gas is characterized by comprising
The drying tower is internally provided with an atomizing unit for atomizing wet sludge into sludge droplets, and one side of the drying tower close to the bottom is provided with a flue gas inlet;
the flue gas conveying device is communicated with a flue gas inlet of the drying tower so that flue gas enters the drying tower to dry the sludge liquid drops;
and the coal grinding device is communicated with the drying tower and is used for receiving and treating the dried sludge.
2. The device for drying sludge by using flue gas as claimed in claim 1, wherein a heat exchange unit is further arranged in the drying tower, the heat exchange unit is positioned at the bottom of the atomization unit, and the heat exchange unit is communicated with the flue gas conveying device.
3. The device for drying sludge by using flue gas as claimed in claim 2, wherein a sludge receiving unit is further arranged in the drying tower, the sludge receiving unit is positioned at the bottom of the heat exchange unit, and the sludge receiving unit is communicated with the coal grinding device through a pneumatic conveying pump.
4. The device for drying sludge by using flue gas as claimed in claim 1, wherein an atomizing nozzle is arranged in the atomizing unit, and the atomizing nozzle is fixed at the top of the drying tower.
5. The device for drying sludge by using flue gas as claimed in claim 4, wherein a spraying tray is arranged at the bottom of the atomizing nozzle, and a plurality of small holes are arranged on the spraying tray.
6. The device for drying sludge by using flue gas as claimed in claim 1, wherein a flue gas outlet is arranged at the top of the drying tower, and the flue gas outlet is connected with a dust removal device for treating the flue gas after heat exchange.
7. The device for drying sludge by using flue gas as claimed in claim 6, wherein the dust removing device is a bag-type dust remover.
8. The apparatus for flue gas sludge drying of claim 3, wherein the coal mill comprises a coal dropping pipe and a coal mill, and the sludge receiving unit enters the coal mill through the coal dropping pipe to be mixed with raw coal.
9. The apparatus for flue gas drying of sludge as claimed in claim 1, wherein said flue gas conveying means comprises an electrostatic precipitator, said electrostatic precipitator being in communication with a flue gas inlet of said drying tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221040665.1U CN217677258U (en) | 2022-04-29 | 2022-04-29 | Device for drying sludge by using flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221040665.1U CN217677258U (en) | 2022-04-29 | 2022-04-29 | Device for drying sludge by using flue gas |
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| Publication Number | Publication Date |
|---|---|
| CN217677258U true CN217677258U (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221040665.1U Active CN217677258U (en) | 2022-04-29 | 2022-04-29 | Device for drying sludge by using flue gas |
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| CN (1) | CN217677258U (en) |
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- 2022-04-29 CN CN202221040665.1U patent/CN217677258U/en active Active
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