CN115043569B - Sludge co-firing system and co-firing method for thermal power plant - Google Patents
Sludge co-firing system and co-firing method for thermal power plant Download PDFInfo
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- CN115043569B CN115043569B CN202210716486.3A CN202210716486A CN115043569B CN 115043569 B CN115043569 B CN 115043569B CN 202210716486 A CN202210716486 A CN 202210716486A CN 115043569 B CN115043569 B CN 115043569B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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Abstract
The application provides a sludge blending combustion system and a blending combustion method for a thermal power plant, and belongs to the technical field of sludge blending combustion treatment. In the co-combustion system, a drying cylinder is arranged above the top of a boiler through a mounting assembly, an annular cavity is formed in the side wall of the drying cylinder, the bottom of the annular cavity is communicated with the inner side of the top of the boiler through a first hot air pipe, and the top of the annular cavity is connected with one end of a first exhaust pipe; the inner side of the bottom of the drying cylinder is communicated with one end of the sludge transfer unit; the center of the top of the boiler is connected with a uniform drying assembly through a connecting assembly, the top of the uniform drying assembly is connected with a rotating shaft power assembly, and the rotating shaft power assembly is arranged on an installation assembly; the three-stage drying unit is arranged on the outer side of the boiler, the bottom of the three-stage drying unit is connected with the vibration falling-promoting unit, and the vibration falling-promoting unit is arranged on the outer side of the bottom of the boiler. The blending combustion system can improve the drying effect and efficiency of the sludge, improve the blending combustion treatment effect of the sludge and fully utilize the high-temperature flue gas of the boiler.
Description
Technical Field
The application relates to the technical field of sludge co-firing treatment, in particular to a sludge co-firing system and a co-firing method of a thermal power plant.
Background
Along with the development of industrialization and the acceleration of urban process in China, a large amount of industrial sludge and domestic sludge are generated, the sludge has high water content and contains a large amount of pathogenic bacteria, parasitic ova, chromium, mercury and other heavy metal toxic and harmful substances, and the problem of sludge treatment becomes a great environmental protection problem to be solved in the current society.
At present, most of sludge drying-burning engineering put into operation in a thermal power plant belongs to reconstruction engineering, and the original boiler cannot directly accept sludge with high water content, and needs to be dried first and then put into the boiler of the thermal power plant for blending burning.
However, the existing sludge drying and combustion integrated device still has the following defects: when the water content of the sludge is too high, the drying efficiency of the sludge is low, and the sludge can be used by blending combustion after being dried for a long time, so that the blending combustion treatment efficiency of the sludge is affected.
Disclosure of Invention
The application aims to provide a sludge co-combustion system of a thermal power plant so as to solve the technical problems.
The second purpose of the application is to provide a method for mixing and burning the sludge in the thermal power plant.
The application can be realized as follows:
in a first aspect, the application provides a sludge blending combustion system of a thermal power plant, which comprises a boiler, wherein a furnace mouth is arranged on the side surface of the bottom of the boiler, and the sludge blending combustion system of the thermal power plant further comprises: the device comprises a sludge feeding and drying unit, a secondary feeding and drying unit, a tertiary drying unit, a sludge transferring unit and a vibration falling promotion unit;
the sludge feeding and drying unit comprises a first hot air pipe, a drying cylinder, an annular cavity, a mounting assembly and a first exhaust pipe, wherein the drying cylinder is mounted above the top of the boiler through the mounting assembly, the annular cavity is formed in the side wall of the drying cylinder, the bottom of the annular cavity is communicated with the inner side of the top of the boiler through the first hot air pipe, the top of the annular cavity is connected with one end of the first exhaust pipe, and the inner side of the bottom of the drying cylinder is communicated with one end of the sludge transferring unit;
the secondary feeding drying unit is arranged on the connecting component and the uniform drying component, the center of the top of the boiler is connected with the uniform drying component through the connecting component, the top of the uniform drying component is connected with the rotating shaft power component, and the rotating shaft power component is arranged on the mounting component;
the three-stage drying unit is arranged on the outer side of the boiler, the bottom of the three-stage drying unit is connected with the vibration falling promotion unit, and the vibration falling promotion unit is arranged on the outer side of the bottom of the boiler.
In an alternative embodiment, even stoving subassembly includes hollow pivot, screw feed blade and spiral cavity, and the middle part rotates in the stoving section of thick bamboo and is connected with hollow pivot, and the side of hollow pivot is provided with screw feed blade, and screw feed blade's inside has seted up the spiral cavity, and the inside intercommunication of spiral cavity and hollow pivot is provided with steam interception subassembly at the top of hollow pivot.
In an alternative embodiment, the connecting assembly comprises a second hot air pipe, a lower rotary joint, a second exhaust pipe and an upper rotary joint, the top center of the boiler is connected with the bottom end of the second hot air pipe, the top end of the second hot air pipe is connected with the bottom end of the hollow rotating shaft through the lower rotary joint, the top end of the hollow rotating shaft is connected with one end of the second exhaust pipe through the upper rotary joint, and the second exhaust pipe is connected with the top end of the first exhaust pipe.
In an alternative embodiment, the tertiary stoving unit includes spiral stoving cell body and drum frame, and the outside of boiler is equipped with the vertical spout of no less than two, and spiral stoving cell body spiral is around the outside at the boiler, and the inboard of spiral stoving cell body be equipped with spout vertical sliding connection's draw runner, the outside fixedly connected with drum frame of spiral stoving cell body, the top of spiral stoving cell body is sealed through the top baffle.
In optional embodiment, mud transfer unit includes transfer passageway, transfer axle, synchronous power component, the adapter sleeve, transfer pole and transfer dish, the top of transfer passageway is linked together to the bottom inboard of stoving section of thick bamboo, the bottom downwardly extending of transfer passageway just is located spiral stoving cell body's top upside, spiral stoving cell body's bottom is located the fire door side, equidistant rotation is connected with the transfer axle in the transfer passageway, the adapter sleeve has been cup jointed through the fixed both ends of every transfer axle, two adapter sleeves are connected respectively at the both ends of transfer pole, and the inboard equidistant transfer dish that is connected with of transfer pole, evenly seted up the through-hole on the transfer dish, and the side box is installed to one side of transfer passageway, install synchronous power component in the side box, synchronous power component connects the transfer axle.
In an alternative embodiment, the vibration fall promoting unit comprises a vibration jacking component and a fall back component, the vibration jacking component comprises a vibration generating motor, a cam and a roller, the bottom of the cylinder frame is provided with a wheel seat, the wheel seat rotates the roller through a wheel shaft, the outer side of the bottom of the boiler is fixedly connected with a motor mounting ring, the motor mounting ring is fixedly provided with the vibration generating motor through a side sleeve, an output shaft of the vibration generating motor is connected with the cam, and the cam is in rolling connection with an annular groove on the outer peripheral side of the roller.
In an alternative embodiment, the falling back assembly comprises tension springs, the positions of the bottoms of the cylinder frames, which are positioned on two sides of the wheel seat, are respectively connected with the top ends of the two tension springs through spring fixing columns, the bottom ends of the two tension springs are respectively connected with two spring fixing plates, and the two spring fixing plates are respectively fixed at the bottoms of the boilers.
In an alternative embodiment, the sludge blending and burning system of the thermal power plant further comprises a sludge stirring assembly, and the sludge stirring assemblies are arranged at equal intervals inside the spiral drying groove body.
In an alternative embodiment, the sludge blending combustion system of the thermal power plant further comprises a sludge blending combustion control unit, the sludge blending combustion control unit comprises a control door plate and a door shaft stop assembly, side blocks are respectively fixed at the tops of two sides of the bottom end of the spiral drying groove body, a door shaft is rotatably connected between the two side blocks, the outer end of the door shaft is connected with a hand wheel, the bottom of the door shaft is connected with the control door plate corresponding to the bottom end opening of the spiral drying groove body, and the door shaft stop assembly for controlling the rotation of the door shaft is installed on the side blocks at the front side.
In a second aspect, the present application provides a method for blending combustion of sludge in a thermal power plant, wherein the blending combustion is performed by using the sludge blending combustion system in the thermal power plant according to any one of the foregoing embodiments.
The beneficial effects of the application include:
1. the sludge to be treated is firstly placed into the drying cylinder, high-temperature flue gas generated by combustion in the boiler enters the annular cavity on the side wall of the drying cylinder through the first hot air pipe, the sludge in the drying cylinder is heated and dried, then the high-temperature flue gas is discharged through the first exhaust pipe for aftertreatment, the high-temperature flue gas generated by combustion in the boiler can enter the uniform drying assembly through the connecting assembly, the drying area of the sludge can be increased through the uniform drying assembly, the falling speed of the sludge in the drying cylinder is controlled, meanwhile, the drying efficiency is improved, and the sludge with high water content can be effectively treated;
2. the relatively dry sludge is transferred to the three-stage drying unit through the sludge transfer unit, and the three-stage drying unit is positioned at the outer side of the boiler, and the sludge is dried for the third time through the heat radiated outwards by the boiler, so that the sludge suitable for being mixed and burned into the boiler is dried, the vibration falling-promoting unit can promote the falling of the sludge in the three-stage drying unit, and the falling of the sludge in the three-stage drying unit is avoided.
3. The drying effect and the drying efficiency of the sludge can be improved, the sludge which can be used for drying can be prevented from being dried after long-time drying, and the co-firing treatment effect of the sludge is improved;
4. the high-temperature flue gas of the boiler can be fully utilized, so that energy sources for drying are saved, and most of steam generated by drying can be conveniently recovered.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a sludge blending combustion system of a thermal power plant;
FIG. 2 is a schematic diagram of a side view structure of a sludge blending combustion system of a thermal power plant;
FIG. 3 is a schematic diagram of a partial enlarged structure of the sludge co-firing system in the thermal power plant of the application at A in FIG. 2;
FIG. 4 is a schematic diagram of the internal structure of a sludge transfer unit of the sludge blending combustion system of the thermal power plant;
FIG. 5 is a schematic diagram of a partial structure of a sludge transfer unit of the sludge blending combustion system of the thermal power plant;
FIG. 6 is a schematic diagram of a partial cross-sectional structure of a sludge blending combustion system of a thermal power plant;
FIG. 7 is a schematic diagram of a partial enlarged structure of the sludge co-firing system of the thermal power plant at the position B in FIG. 6;
fig. 8 is a schematic diagram of a local structure of a sludge co-firing control unit of the sludge co-firing system in the thermal power plant.
Icon: 1-a boiler; 2-a sludge feeding and drying unit; 21-a first hot air pipe; 22-a drying cylinder; 23-an annular cavity; 24-conical blocking edge; 25-fixing sleeve; 26-mounting the spoke rod; 27-mounting holes; 28-exhaust pipe I; 29-a mud adding groove; 3-secondary feeding and drying units; 31-a second hot air pipe; 32-a lower swivel; 33-hollow rotating shaft; 34-screw feed blades; 35-helical cavity; 36-a steam shield cone cover; 37-a steam treatment pipe; 38-exhaust pipe II; 39-upper swivel; 4-a spindle power assembly; 41-a motor base; 42-a power motor; 43-long axis; 44-a drive pulley; 45-driving belt; 46-a driven pulley; a 5-sludge transfer unit; 51-transfer channel; 52-side box; 53-a transfer motor; 54-transfer shaft; 55-sprocket; 56-a chain; 57-connecting sleeve; 58-transfer bar; 59-transfer plate; 6-three-stage drying units; 61-spiral drying groove body; 62-top baffle; 63-slide bar; 64-sliding grooves; 65-jacking and fixing rings; 66-erecting a connecting rod; 67-bottom fixing ring; 7-a vibration falling promotion unit; 71-a motor mounting ring; 72-side sleeve; 73-a vibration generating motor; 74-cam; 75-wheel seat; 76-wheel axle; 77-a roller; 78-spring fixing plate; 79-extension spring; 710—spring fixing posts; 8-a sludge mashing assembly; 81-a shredding motor; 82-crushing arched rods; 83-a mashing shaft; 9-a sludge blending burning control unit; 91-side blocks; 92-door spindle; 93-controlling the door panel; 94-a hand wheel; 95-control gear; 96-bottom fixing blocks; 97-compressing a spring; 98-clamping blocks; 99-side handle; 10-furnace mouth; 11-a boiler fuelling tank; 12-separator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application 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 application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
Example 1
Referring to fig. 1 to 8, the present embodiment provides a sludge co-firing system for a thermal power plant, which includes a boiler 1, wherein a furnace mouth 10 is provided on a bottom side surface of the boiler 1.
As shown in fig. 1 to 3, the sludge co-firing system of the thermal power plant further comprises a sludge feeding and drying unit 2, a secondary feeding and drying unit 3, a tertiary drying unit 6, a sludge transferring unit 5 and a vibration falling promotion unit 7.
Please combine fig. 1, fig. 2 and fig. 6, the sludge feeding and drying unit 2 comprises a first hot air pipe 21, a drying cylinder 22, an annular cavity 23, a mounting assembly and a first exhaust pipe 28, the drying cylinder 22 is mounted above the top of the boiler 1 through the mounting assembly, the annular cavity 23 is formed in the side wall of the drying cylinder 22, the bottom of the annular cavity 23 is communicated with the inner side of the top of the boiler 1 through the first hot air pipe 21, the top of the annular cavity 23 is connected with one end of the first exhaust pipe 28, and the inner side of the bottom of the drying cylinder 22 is communicated with one end of the sludge transferring unit 5.
The top of the dryer cylinder 22 is provided with a tapered stop 24 to prevent sludge from spilling over the top rim of the dryer cylinder 22. A mud adding groove 29 is arranged at one side of the conical baffle edge 24 and is used for adding mud at the mud adding groove 29, and the mud enters the drying cylinder 22 along the inner side of the conical baffle edge 24 due to gravity.
As shown in fig. 1, the installation assembly comprises a fixing sleeve 25, a mounting spoke rod 26 and a mounting hole 27, the outer side of the drying cylinder 22 is fixedly sleeved with the fixing sleeve 25, the outer side annular array of the fixing sleeve 25 is connected with one end of the mounting spoke rod 26, the other end of the mounting spoke rod 26 is provided with at least two mounting holes 27, and the mounting holes 27 are fixedly arranged on an external reconstruction bracket through mounting bolts, so that the drying cylinder 22 is stably supported.
The secondary is fed stoving unit 3 and is installed at coupling assembling and even stoving subassembly, and even stoving subassembly is connected through coupling assembling in the top center of boiler 1, and pivot power pack 4 is connected at the top of even stoving subassembly, and pivot power pack 4 installs on the installation component.
Referring to fig. 2 again, the uniform drying assembly includes a hollow rotating shaft 33, a screw feeding blade 34 and a screw cavity 35, the hollow rotating shaft 33 is rotatably connected to the middle part in the drying cylinder 22, the screw feeding blade 34 is disposed on the side surface of the hollow rotating shaft 33, the screw cavity 35 is disposed in the screw feeding blade 34, the screw cavity 35 is communicated with the inside of the hollow rotating shaft 33, and the steam interception assembly is disposed at the bottom of the hollow rotating shaft 33.
Referring to fig. 1 and 2, the steam interception assembly includes a steam shielding conical cover 36 and a steam treatment pipe 37, the bottom of the hollow rotating shaft 33 is fixedly sleeved with the steam shielding conical cover 36, the top of the center of the steam shielding conical cover 36 is connected with one end of the steam treatment pipe 37, the other end of the steam treatment pipe 37 is connected with a steam treatment device, and the steam mixed with toxic gas in sludge is prevented from being discharged.
The high-temperature flue gas enters the hollow rotating shaft 33 and then enters the spiral cavity 35, so that the hollow rotating shaft 33 and the spiral feeding blades 34 are in a high-temperature state, the contact area between the spiral feeding blades 34 and the hollow rotating shaft 33 and the sludge in the drying cylinder 22 is increased, and the rotating shaft power assembly 4 drives the hollow rotating shaft 33 and the spiral feeding blades 34 to rotate so as to control the falling of the sludge, so that the problem of sludge drying failure caused by the rapid passing of the sludge through the drying cylinder 22 is avoided. And moreover, the high-temperature flue gas in the boiler is adopted for drying, no extra energy is needed, the steam interception component can intercept a large amount of steam at the previous two drying positions, so that the water vapor at the sludge evaporation position is conveniently collected for treatment, and harmful substances in the water vapor are prevented from being discharged.
Referring to fig. 1 and 2, the connection assembly includes a second hot air pipe 31, a lower rotary joint 32, a second exhaust pipe 38 and an upper rotary joint 39, the top center of the boiler 1 is connected with the bottom end of the second hot air pipe 31, the top end of the second hot air pipe 31 is connected with the bottom end of the hollow rotating shaft 33 through the lower rotary joint 32, the top end of the hollow rotating shaft 33 is connected with one end of the second exhaust pipe 38 through the upper rotary joint 39, and the second exhaust pipe 38 is connected with the top end of the first exhaust pipe 28.
The lower rotary joint 32 and the upper rotary joint 39 are pipe connection devices, and the connected pipes can rotate relatively.
The lower rotary joint 32 and the upper rotary joint 39 can allow the hollow rotating shaft 33 to keep connection effectiveness with pipelines at two ends when rotating, hot gas in the boiler 1 enters the hollow rotating shaft 33 through the hot gas pipe II 31 and the lower rotary joint 32 and then is discharged through the exhaust pipe II 38, and smoke after being used in the exhaust pipe II 38 and the exhaust pipe I28 is mixed, so that subsequent smoke treatment is facilitated.
Referring to fig. 1, the rotating shaft power assembly 4 includes a motor base 41, a power motor 42, a long shaft 43, a driving pulley 44, a driving belt 45, and a driven pulley 46, the side surface of the fixed sleeve 25 is fixedly connected with the power motor 42 through the motor base 41, the top output shaft of the power motor 42 is connected with the bottom end of the long shaft 43, the top end of the long shaft 43 is connected with the driving pulley 44, the top of the hollow rotating shaft 33 is fixedly connected with the driven pulley 46, and the driven pulley 46 is in transmission connection with the driving pulley 44 through the driving belt 45.
The power motor 42 works to drive the long shaft 43 and the driving belt pulley 44 to rotate, and the driven belt pulley 46 is driven to rotate through the rotation of the driving belt 45, so that the hollow rotating shaft 33 and the spiral feeding blades 34 are driven to rotate in the drying cylinder 22, the falling speed of the sludge can be controlled through the rotating speed, meanwhile, the sludge can be stably moved downwards, and the sludge is promoted to be transferred out through the sludge transfer unit 5.
The tertiary stoving unit 6 is installed in the outside of boiler 1, and the vibrations are promoted and fall unit 7 is connected to the bottom of tertiary stoving unit 6, and vibrations are promoted and fall unit 7 is installed in the bottom outside of boiler 1.
Referring to fig. 1 and 2, the three-stage drying unit 6 includes a spiral drying groove body 61, a top baffle 62, a slide bar 63, a slide groove 64 and a cylindrical frame, at least two vertical slide grooves 64 are provided on the outer side of the boiler 1, the spiral drying groove body 61 is spirally wound on the outer side of the boiler 1, the slide bar 63 vertically slidably connected with the slide groove 64 is provided on the inner side of the spiral drying groove body 61, the cylindrical frame is fixedly connected to the outer side of the spiral drying groove body 61, and the top end of the spiral drying groove body 61 is closed by the top baffle 62.
The cylinder frame includes top solid ring 65, perps pole 66, bottom solid ring 67, and the bottom of top solid ring 65 passes through the perps pole 66 of annular array and connects the top of bottom solid ring 67, and perps pole 66 to be fixed in spiral stoving cell body 61's outside, and top solid ring 65, perps pole 66, bottom solid ring 67 form a stable cylinder frame, promotes the structural strength of spiral stoving cell body 61, avoids spiral stoving cell body 61 to hold too much mud and causes the deformation.
The bottom of spiral stoving cell body 61 is located the outside of fire door 10, and the outer end of fire door 10 connects boiler fuel filling groove 11, and the middle part is provided with baffle 12 in the boiler fuel filling groove 11, and baffle 12 separates boiler fuel filling groove 11 into two charging channel, and one charging channel passes through the fuel, and another corresponds the bottom of spiral stoving cell body 61 for the mud grain after passing through the drying.
In the above-mentioned structure, spiral stoving cell body 61 spiral is around the outside at boiler 1, can effectively utilize the outside radiating heat of boiler 1, and the drum frame can be fixed in the outside of spiral stoving cell body 61, still can guarantee that the stable structure is indeformable after guaranteeing to hold many mud in the spiral stoving cell body 61, and slide 63, spout 64 can make spiral stoving cell body 61 can vertical activity, conveniently carry out vertical vibrations operation to spiral stoving cell body 61, do benefit to the whereabouts of being dried mud in the spiral stoving cell body 61.
Referring to fig. 1, 4 and 5, the sludge transfer unit 5 includes a transfer passage 51, a side case 52, a transfer shaft 54, a synchronous power assembly, a connecting sleeve 57, a transfer lever 58 and a transfer tray 59. The bottom inboard intercommunication transfer passage 51 of stoving section of thick bamboo 22, the bottom downwardly extending of transfer passage 51 just is located the top upside of spiral stoving cell body 61, the bottom of spiral stoving cell body 61 is located the fire door 10 side, equidistant rotation is connected with transfer axle 54 in the transfer passage 51, the adapter sleeve 57 has been cup jointed through the fixed both ends of every transfer axle 54, two adapter sleeves 57 are connected respectively at the both ends of transfer pole 58, and the inboard equidistant transfer dish 59 that is connected with of transfer pole 58, evenly seted up the through-hole on the transfer dish 59, and side box 52 is installed to one side of transfer passage 51, install synchronous power component in the side box 52, synchronous power component connects transfer axle 54.
With continued reference to fig. 4, the synchronous power assembly includes a transfer motor 53, a sprocket 55, and a chain 56, wherein an end portion of each transfer shaft 54 extends into the side case 52 and is connected with the sprocket 55, the sprocket 55 is in transmission connection with the chain 56, one of the transfer shafts 54 extends to the outer side of the side case 52 and is connected with an output shaft of the transfer motor 53, the transfer motor 53 is fixed to the outer side of the side case 52, the transfer shafts 54 are driven to rotate by the operation of the transfer motor 53, and the transfer shafts 54 are synchronously rotated in the same direction by the synchronous transmission of the sprocket 55 and the chain 56.
The sludge dried at the bottom of the drying cylinder 22 is hardened, the spiral feeding blade 34 pushes the sludge into the transfer channel 51, the synchronous power assembly works to drive the transfer shaft 54 in the transfer channel 51 to rotate, then the transfer rod 58 is driven to rotate through the connecting sleeve 57, the hard sludge is stirred and smashed by the transfer rod 58, the stirring effect on the sludge can be improved through the transfer disc 59, the air permeability of the transfer disc 59 can be realized through the through hole, the phenomenon that excessive sludge is stuck on the side surface of the transfer disc 59 with a large section is avoided, and the side box 52 protects the synchronous power assembly.
By placing sludge to be treated into the drying cylinder 22, the high-temperature flue gas generated by burning the boiler 1 enters the annular cavity 23 on the side wall of the drying cylinder 22 through the first hot air pipe 21, the sludge in the drying cylinder 22 is heated and dried, then the high-temperature flue gas is discharged for post-treatment through the first exhaust pipe 28, the high-temperature flue gas generated by burning the boiler 1 can enter the uniform drying assembly through the connecting assembly, the drying area of the sludge can be increased through the uniform drying assembly, the falling speed of the sludge in the drying cylinder 22 is controlled, the drying efficiency is improved, the sludge with high water content can be effectively treated, the relatively dried sludge is transferred to the three-stage drying unit 6 through the sludge transfer unit 5, and the sludge is dried for the third time through the heat radiated by the boiler 1 because the three-stage drying unit 6 is positioned outside the boiler 1, so that the sludge suitable for being mixed and burnt into the boiler 1 is prevented from falling slowly in the three-stage drying unit 6 through the vibration promoting unit 7.
Further, the sludge co-combustion system of the thermal power plant further comprises a vibration falling promotion unit 7.
Referring to fig. 2 and 3, the vibration-and-fall promoting unit 7 includes a vibration jack-up assembly including a motor mounting ring 71, a side sleeve 72, a vibration generating motor 73, a cam 74, a wheel seat 75, a wheel shaft 76, and a roller 77, and a fall-back assembly. The wheel seat 75 is installed to the bottom of drum frame, and wheel seat 75 rotates gyro wheel 77 through shaft 76, and the bottom outside fixedly connected with motor collar 71 of boiler 1, motor collar 71 are fixed with vibrations through side cover 72 and take place motor 73, and the output shaft of vibrations take place motor 73 is connected cam 74, and cam 74 rolls with the ring channel roll connection of gyro wheel 77 periphery side.
The motor mounting ring 71 and the side sleeve 72 are used for fixedly mounting the vibration generating motor 73, the vibration generating motor 73 works to drive the cam 74 to rotate, and the irregularity of the cam 74 can push the roller 77 in the wheel seat 75 to move up and down while rolling, so that the cylindrical frame drives the spiral drying groove body 61 to move up and down, the spiral drying groove body 61 can form a vibration effect, and spiral falling of sludge in the spiral drying groove body 61 is promoted. Through the cooperation that the annular groove made gyro wheel 77 and cam 74 stable, the back fall subassembly makes spiral stoving cell body 61 stable along spout 64 gliding, avoids because the too big spiral stoving cell body 61 of causing of frictional force can not fall, ensures the steady progress of vibrations.
The drop-back assembly includes a spring retainer plate 78, a tension spring 79, and a spring retainer post 710. The bottom of drum frame is located the top of two extension springs 79 through spring fixed column 710 connection respectively in the position of wheel seat 75 both sides, and two spring fixed plate 78 are connected respectively to the bottom of two extension springs 79, and two spring fixed plate 78 are fixed respectively in the bottom of boiler 1, and spring fixed plate 78 and spring fixed column 710 are stable to the extension spring 79 both ends are fixed, make drum frame have stable downward trend through the pulling force of extension spring 79, avoid drum frame can not stable whereabouts.
Further, the sludge co-combustion system of the thermal power plant further comprises a sludge crushing assembly 8.
Referring to fig. 6, sludge mashing assemblies 8 are mounted on the inner side of the spiral drying tank body 61 at equal intervals, and the sludge mashing assemblies 8 mashing sludge in the spiral drying tank body 61, so that subsequent blending is facilitated, meanwhile, the falling of the sludge in the spiral drying tank body 61 can be promoted by stirring, the falling of the sludge can be delayed by reverse stirring, and the drying time of the sludge is sequentially increased.
Referring to fig. 6 and 7, the sludge mashing assembly 8 includes a mashing motor 81, a mashing arch bar 82, a mashing shaft 83, the mashing shaft 83 is connected to the inside of the spiral drying tank 61 by an equidistant rotation, the mashing shaft 83 is fixedly connected to the mashing arch bar 82 at an equal angle to the side of the mashing shaft 83, the mashing motor 81 is connected to one end of the mashing shaft 83, and the mashing motor 81 is fixed to the outside of the spiral drying tank 61.
Wherein the stirring motor 81 adopts a servo motor, can rotate positively and negatively, can drive the stirring shaft 83 and the crushing arch rod 82 to rotate anticlockwise to stir the sludge when the stirring motor 81 rotates clockwise, can slow down the sliding speed of the sludge in the spiral drying groove body 61 in the process of stirring the sludge at the moment, and can also speed up the sliding speed of the sludge in the spiral drying groove body 61 in the process of stirring the sludge when the stirring motor 81 rotates anticlockwise.
Further, the sludge co-firing system of the thermal power plant further comprises a sludge co-firing control unit 9.
Referring to fig. 7 and 8, the sludge co-firing control unit 9 includes a side block 91, a door shaft 92, a control door panel 93, a hand wheel 94, and a door shaft stopper assembly. The top of the two sides of the bottom end of the spiral drying groove body 61 is respectively fixed with a side block 91, a door shaft 92 is rotatably connected between the two side blocks 91, the outer end of the door shaft 92 is connected with a hand wheel 94, the bottom of the door shaft 92 is connected with a control door plate 93 corresponding to the bottom end opening of the spiral drying groove body 61, and a door shaft stop assembly for controlling the rotation of the door shaft 92 is arranged on the side block 91 on the front side.
The door shaft 92 is controlled by the door shaft stop assembly, so that the opening, closing and stirring of the door plate 93 are controlled, the falling speed of crushed aggregates after sludge drying is controlled, the amount of doped combustion in the boiler is controlled, and the hand wheel 94 facilitates the rotation of the door shaft 92.
As shown in fig. 8, the door shaft stopper assembly includes a control gear 95, a bottom fixing block 96, a compression spring 97, a latch 98, and a side handle 99. The door shaft 92 is fixed with the control gear 95 in the place ahead of the side piece 91 of front side, and the preceding bottom of side piece 91 of front side is fixed with the end fixed block 96, and the top of end fixed block 96 passes through compression spring 97 and connects fixture block 98, pushes the side that fixture block 98 blocked into control gear 95 under compression spring 97 elastic force, and the both sides of fixture block 98 are provided with the side respectively and hold 99.
The clamping block 98 can be pulled down through the side handle 99, the compression spring 97 can be compressed, the clamping block 98 is separated from the control gear 95, the door shaft 92 is conveniently rotated through the hand wheel 94, the opening and closing degree of the bottom end opening of the spiral drying groove body 61 by the control door plate 93 is controlled, the falling amount of sludge particles is controlled, the side handle 99 is loosened, the compression spring 97 rebounds to enable the clamping block 98 to be clamped with the control gear 95 again, the control door plate 93 is in a stable state again, and an operator does not need to hold the hand wheel 94 in real time to control the control door plate 93.
Example 2
The embodiment provides a method for blending and burning sludge in a thermal power plant, and specifically adopts the method for blending and burning sludge in the thermal power plant provided in the embodiment 1.
For reference, the co-firing process may include the steps of:
step one: putting sludge to be treated into a drying cylinder 22, enabling hot flue gas in a boiler 1 to enter an annular cavity 23 through a first hot gas pipe 21, heating the side wall of the drying cylinder 22, and primarily drying the sludge by the drying cylinder 22;
step two: hot flue gas in the boiler 1 enters a hollow rotating shaft 33 through a lower rotating joint 32 and then spreads into a spiral cavity 35 of a spiral feeding blade 34, a rotating shaft power assembly 4 drives the spiral feeding blade 34 to rotate in a drying cylinder 22, the falling speed of sludge in the drying cylinder 22 is controlled, and meanwhile, the sludge is secondarily dried by means of heat in the hollow rotating shaft 33 and the spiral feeding blade 34;
step three: the sludge falls down through a transfer channel 51 in the sludge transfer unit 5, a synchronous power assembly drives a transfer shaft 54 to rotate in the transfer channel 51, and secondarily dried sludge is scattered through a transfer disc 59 on a connecting sleeve 57 and then falls down to the top of a spiral drying groove 61;
step four: the scattered sludge continuously falls in the spiral drying groove body 61, and the heat radiated outwards from the side surface of the boiler 1 dries the scattered sludge of the spiral drying groove body 61 again;
step five: the sludge crushing assembly 8 crushes the falling sludge in the spiral drying groove body 61, and simultaneously stirs the sludge to ensure that the sludge is dried at all angles;
step six: the vibration jacking component in the vibration falling promotion unit 7 controls the spiral drying groove body 61 to vibrate up and down, the spiral drying groove body 61 is ensured to fall back normally through the falling component, and the vibration of the spiral drying groove body 61 enables the sludge crushed inside to fall down stably;
step seven: the hand wheel 94 in the sludge blending burning control unit 9 is used for twisting the door shaft 92, and the control door plate 93 is used for controlling the size of the bottom end opening of the spiral drying groove body 61 and controlling the amount of sludge blending burning.
It should be noted that, in the above embodiments, the input ends of the power motor 42, the transfer motor 53, the vibration generating motor 73 and the shredding motor 81 are electrically connected to the output end of the external power source through the external PLC controller, respectively, the power motor 42, the transfer motor 53 and the shredding motor 81 are all servo motors, the vibration generating motor 73 is a three-phase asynchronous motor, and the external PLC controller controls the power motor 42, the transfer motor 53, the vibration generating motor 73 and the shredding motor 81 to operate by a method commonly used in the prior art.
In summary, the system and the method for mixing and burning the sludge in the thermal power plant can improve the drying effect and the drying efficiency of the sludge, avoid long-time drying to dry the available sludge, improve the mixing and burning treatment effect of the sludge, fully utilize the high-temperature flue gas of the boiler 1, save the energy used for drying, and conveniently recycle most of steam generated by drying.
The present application is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a thermal power factory mud adulterated system of burning, includes the boiler, the mouth has been seted up to the bottom side of boiler, its characterized in that, thermal power factory mud adulterated system of burning still includes: the device comprises a sludge feeding and drying unit, a secondary feeding and drying unit, a tertiary drying unit, a sludge transferring unit and a vibration falling promotion unit;
the sludge feeding and drying unit comprises a first hot air pipe, a drying cylinder, an annular cavity, a mounting assembly and a first exhaust pipe, wherein the drying cylinder is mounted above the top of the boiler through the mounting assembly, the annular cavity is formed in the side wall of the drying cylinder, the bottom of the annular cavity is communicated with the inner side of the top of the boiler through the first hot air pipe, the top of the annular cavity is connected with one end of the first exhaust pipe, and the inner side of the bottom of the drying cylinder is communicated with one end of the sludge transferring unit;
the secondary feeding drying unit is arranged on the connecting component and the uniform drying component, the center of the top of the boiler is connected with the uniform drying component through the connecting component, the top of the uniform drying component is connected with the rotating shaft power component, and the rotating shaft power component is arranged on the mounting component;
the three-stage drying unit is arranged at the outer side of the boiler, the bottom of the three-stage drying unit is connected with the vibration falling promotion unit, and the vibration falling promotion unit is arranged at the outer side of the bottom of the boiler;
the three-stage drying unit comprises a spiral drying groove body and a cylindrical frame, wherein at least two vertical sliding grooves are formed in the outer side of the boiler, the spiral drying groove body surrounds the outer side of the boiler in a spiral mode, sliding strips which are vertically connected with the sliding grooves in a sliding mode are arranged on the inner side of the spiral drying groove body, the cylindrical frame is fixedly connected to the outer side of the spiral drying groove body, and the top end of the spiral drying groove body is closed through a top baffle;
the sludge transfer unit comprises a transfer channel, transfer shafts, synchronous power assemblies, connecting sleeves, transfer rods and transfer plates, wherein the inner side of the bottom of the drying cylinder is communicated with the top of the transfer channel, the bottom end of the transfer channel extends downwards and is positioned on the upper side of the top end of the spiral drying groove body, the bottom end of the spiral drying groove body is positioned on the side face of a furnace mouth, the equidistant rotation in the transfer channel is connected with the transfer shafts, the connecting sleeves are fixedly sleeved at the two ends of each transfer shaft, the two ends of each transfer rod are respectively connected with the two connecting sleeves, the inner side of each transfer rod is connected with the transfer plates at equal intervals, through holes are uniformly formed in the transfer plates, a side box is arranged on one side of each transfer channel, the synchronous power assemblies are arranged in the side box, and the synchronous power assemblies are connected with the transfer shafts;
the vibration falling promotion unit comprises a vibration jacking component and a falling component, the vibration jacking component comprises a vibration generation motor, a cam and a roller, the bottom of the cylinder frame is provided with a wheel seat, the wheel seat rotates the roller through a wheel shaft, the outer side of the bottom of the boiler is fixedly connected with a motor mounting ring, the motor mounting ring is fixedly provided with the vibration generation motor through a side sleeve, an output shaft of the vibration generation motor is connected with the cam, and the cam is in rolling connection with an annular groove on the outer periphery side of the roller.
2. The thermal power plant sludge co-firing system according to claim 1, wherein: the even stoving subassembly includes hollow pivot, screw feed blade and spiral cavity, the middle part rotates in the stoving section of thick bamboo and is connected with hollow pivot, the side of hollow pivot is provided with screw feed blade, screw feed blade's inside has seted up spiral cavity, the inside intercommunication of spiral cavity and hollow pivot, the top of hollow pivot is provided with steam interception subassembly.
3. The thermal power plant sludge co-firing system according to claim 2, wherein: the connecting assembly comprises a second hot air pipe, a lower rotary joint, a second exhaust pipe and an upper rotary joint, wherein the top center of the boiler is connected with the bottom end of the second hot air pipe, the top end of the second hot air pipe is connected with the bottom end of the hollow rotating shaft through the lower rotary joint, the top end of the hollow rotating shaft is connected with one end of the second exhaust pipe through the upper rotary joint, and the second exhaust pipe is connected with the top end of the first exhaust pipe.
4. The thermal power plant sludge co-firing system according to claim 1, wherein: the falling-back assembly comprises tension springs, the bottoms of the cylinder frames are located at two sides of the wheel seat and are connected with the top ends of the two tension springs through spring fixing columns respectively, the bottom ends of the two tension springs are connected with two spring fixing plates respectively, and the two spring fixing plates are fixed at the bottom of the boiler respectively.
5. The thermal power plant sludge co-firing system according to claim 1, wherein: the thermal power plant sludge blending system further comprises a sludge crushing assembly, and the sludge crushing assemblies are equidistantly arranged on the inner side of the spiral drying groove body.
6. The thermal power plant sludge co-firing system according to claim 1, wherein: the sludge blending combustion system of the thermal power plant further comprises a sludge blending combustion control unit, the sludge blending combustion control unit comprises a control door plate and a door shaft stop assembly, side blocks are respectively fixed at the tops of two sides of the bottom end of the spiral drying groove body, a door shaft is rotationally connected between the two side blocks, the outer end of the door shaft is connected with a hand wheel, the bottom of the door shaft is connected with the control door plate corresponding to the bottom opening of the spiral drying groove body, and the door shaft stop assembly for controlling the rotation of the door shaft is installed on the side blocks at the front side.
7. A method for blending and burning sludge in a thermal power plant, which is characterized in that the method for blending and burning sludge in the thermal power plant is adopted according to any one of claims 1-6.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB186370A (en) * | 1921-05-02 | 1922-10-02 | Samuel Buxton | Improvements in or relating to drying systems |
| CN103398387A (en) * | 2013-08-16 | 2013-11-20 | 南京创能电力科技开发有限公司 | Automatic sludge blending combustion system |
| CN104016564A (en) * | 2014-06-23 | 2014-09-03 | 王子国 | Sludge multi-effect drying incineration treatment system and application method thereof |
| CN108561888A (en) * | 2018-06-27 | 2018-09-21 | 广东电网有限责任公司 | A kind of coal-burning power plant's sludge co-combustion system |
| CN112460610A (en) * | 2020-12-09 | 2021-03-09 | 西安西热控制技术有限公司 | Thermal power plant mixes burning mud and removes foul smell system |
-
2022
- 2022-06-22 CN CN202210716486.3A patent/CN115043569B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB186370A (en) * | 1921-05-02 | 1922-10-02 | Samuel Buxton | Improvements in or relating to drying systems |
| CN103398387A (en) * | 2013-08-16 | 2013-11-20 | 南京创能电力科技开发有限公司 | Automatic sludge blending combustion system |
| CN104016564A (en) * | 2014-06-23 | 2014-09-03 | 王子国 | Sludge multi-effect drying incineration treatment system and application method thereof |
| CN108561888A (en) * | 2018-06-27 | 2018-09-21 | 广东电网有限责任公司 | A kind of coal-burning power plant's sludge co-combustion system |
| CN112460610A (en) * | 2020-12-09 | 2021-03-09 | 西安西热控制技术有限公司 | Thermal power plant mixes burning mud and removes foul smell system |
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