CN115745356A - Sludge drying system and equipment utilizing waste heat of thermal power plant - Google Patents
Sludge drying system and equipment utilizing waste heat of thermal power plant Download PDFInfo
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- CN115745356A CN115745356A CN202211439145.2A CN202211439145A CN115745356A CN 115745356 A CN115745356 A CN 115745356A CN 202211439145 A CN202211439145 A CN 202211439145A CN 115745356 A CN115745356 A CN 115745356A
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Abstract
The invention discloses a sludge drying system and equipment utilizing waste heat of a thermal power plant, which comprises a wet sludge spiral feeder, a hollow spiral drying cylinder, a dry sludge spiral feeder, a sludge forming machine, a belt type sludge drying conveying device, a sludge scraper and a tail gas treatment device, wherein a stirring roller is separated from a central shaft by the hollow spiral drying cylinder, so that sludge is not blocked at a joint, smoke is introduced into the central shaft for circulation, heat exchange can be enhanced, sludge is effectively dried, energy consumption is reduced, a motor can adjust the rotating speed according to the viscosity and drying condition of the sludge, the sludge is ensured to enter the equipment and be conveyed at a constant speed and is heated uniformly, the sludge is dried by utilizing waste smoke and waste water discharged by power generation of the thermal power plant, the mass transfer efficiency of the sludge is improved by heat supply, the discharge of pollutants is reduced, the equipment effectively avoids a maximum viscous zone with the water content of 40-60% by adding powdery dry materials, the conveying energy consumption of drying is reduced, and energy is saved.
Description
Technical Field
The embodiment of the invention relates to the technical field of sludge treatment, in particular to a sludge drying system and equipment utilizing waste heat of a thermal power plant.
Background
In recent years, the sewage treatment rate of China is improved year by year, the amount of sludge generated in the sewage treatment process is increased day by day, and the sludge treatment becomes a concern all over the world in order to prevent secondary pollution and efficiently utilize effective components of municipal sludge. At present, sludge treatment modes mainly comprise landfill, incineration, composting and the like, but no matter how the method needs to be dried, the economic and efficient drying of the sludge becomes an important subject of sludge treatment.
A large amount of waste heat will be discharged every day to the steam power plant, utilizes the waste heat that the steam power plant generated electricity discharged to carry out the mummification to mud and handles, can make the water content greatly reduced of mud on the one hand like this, and it is finally safe, rationally to deal with it, still can make full use of the waste heat that the steam power plant originally can't utilize simultaneously, makes the energy not wasted, has embodied circular economy's development theory.
The inventor researches and discovers that along with the reduction of the water content of the sludge, the viscosity of the sludge is increased and then reduced, and a high-viscosity interval of the sludge exists, so that the energy consumption for conveying the sludge is increased. Researches show that when the water content of the sludge is 40-60%, the viscosity of the sludge is higher than that of the sludge with other water contents. At present, common sludge drying equipment comprises a spiral dryer, a fluidized bed dryer, a rotary disc dryer and the like, sludge is fully dried by only using a drying technology, sludge in a high viscous region is attached to the inner wall of the drying equipment and a stirring roller to increase drying energy consumption, and even a blockage accident of the sludge equipment can be caused in serious conditions, so that the stronger the capacity of a sludge drying system for treating viscous and adhesive sludge is, the better the capacity is.
The inventor researches and finds that when the water content of the sludge is reduced to below 40%, the heat conductivity coefficient of the sludge is reduced, the mass transfer rate is gradually reduced, the heat transfer efficiency is far lower than that of the sludge drying process with high water content, at the moment, if the sludge is continuously dried, the required higher drying temperature enhances heat exchange, but the sludge drying temperature is higher than 150 ℃, a large amount of volatile organic matters in the sludge are released, and air pollution is caused, so that the energy utilization rate of the existing drying technology with the same temperature is low.
Disclosure of Invention
In order to solve the problems, the invention provides a sludge drying system and equipment using waste heat of a thermal power plant, which solve the problems that the sludge has the largest viscosity between 40% and 60% of water content and is easy to attach to the inner wall of the drying equipment and a stirring roller or a spiral conveying device to increase energy consumption, and avoid serious accidents even causing the blockage of the sludge equipment, which causes the use of the equipment to be influenced after solidification.
In order to achieve the purpose, the invention adopts the technical scheme that:
a sludge drying system and equipment utilizing waste heat of a thermal power plant comprise a sludge primary drying device, a sludge mixing treatment device, a sludge secondary drying and conveying device and a tail gas recovery system, wherein the primary drying device comprises a sludge feeding device, a hollow spiral drying cylinder, a waste heat recovery heating cylinder and a flue gas circulation shaft, the hollow spiral drying cylinder is horizontally arranged, the waste heat recovery heating cylinder flue gas circulation shaft is sleeved outside the hollow spiral drying cylinder and is arranged at the axis of the hollow spiral drying cylinder, the waste heat recovery heating cylinder and the flue gas circulation shaft are communicated at the second end of the hollow spiral drying cylinder, the input end of the waste heat recovery heating cylinder and the output end of the flue gas circulation shaft are both arranged at the first end of the hollow spiral drying cylinder, and the waste heat recovery heating cylinder and the flue gas circulation shaft form a heat medium circulation channel so as to primarily dry sludge in the hollow spiral drying cylinder; a hollow spiral blade is arranged in the hollow spiral drying cylinder, a motor IV is arranged at the end face of the second end of the hollow spiral drying cylinder, and the power end of the motor IV is connected with the hollow spiral blade to drive sludge in the hollow spiral drying cylinder to be stirred and conveyed from the first end to the second end of the hollow spiral drying cylinder;
the hollow spiral drying cylinder is provided with a sludge output end and a tail gas recovery end near the second end, the sludge output end is connected with the input end of the sludge mixing treatment device, and the output end of the sludge mixing treatment device is connected with the input end of the secondary sludge drying and conveying device; the tail gas recovery end is connected with the input end of the tail gas recovery system.
Preferably, the sludge feeding device comprises a wet sludge feeding device and a dry sludge feeding device, the output end of the wet sludge feeding device is connected to the first end of the hollow spiral drying cylinder, and the output end of the dry sludge feeding device is connected to the second end of the hollow spiral drying cylinder.
Preferably, the wet sludge feeding device comprises a first feed hopper, three groups of helical blades, a transmission device, a first motor and a second motor, wherein the three groups of helical blades are all arranged in the first feed hopper and are attached to the conical inner wall in the first feed hopper, and the output end of the first motor is in power connection with the three groups of helical blades through the transmission device and can drive the helical blades to rotate; the second motor is connected with the three groups of helical blades through a transmission device and can drive the three groups of helical blades to revolve along the axis of the first feed hopper;
dry mud feed arrangement includes second feeder hopper, auger delivery blade and motor three, and wherein the auger delivery blade sets up in the second feeder hopper, motor three's output with the auger delivery blade is connected, and the auger delivery blade extends to the lower part delivery outlet department of second feeder hopper by the middle part of second feeder hopper.
Preferably, the sludge primary drying device has 2-4 groups.
As preferred, mud compounding processing apparatus is including being used for the mud mixing machine with the mud intensive mixing of mud and being used for the mud extrusion after the preliminary drying to be the mud extrusion spiral of strip, the input of mud mixing machine with the mud output of the elementary drying device of mud is connected, and the output setting of mud mixing machine is in the top of mud extrusion spiral, mud extrusion spiral sets up the top at the first end of the secondary dry conveyor of mud.
Preferably, the main body of the secondary drying and conveying device is a belt-type sludge drying and conveying device, the belt-type sludge drying and conveying device comprises a plurality of fixed rotating wheels, the fixed rotating wheels are hollow tubular structures, the tubular structures of two adjacent fixed rotating wheels are connected through a high-temperature-resistant bent hose, so that the tubular structures in the fixed rotating wheels form sequentially-connected channels, and a heating medium is introduced into the channels to perform secondary heating on the sludge conveyed by the conveying surface of the belt-type sludge drying and conveying device through the fixed rotating wheels;
and a sludge scraper for removing sludge on the conveying surface of the belt type sludge drying and conveying device is arranged at the second end of the belt type sludge drying and conveying device.
Preferably, the device further comprises a partition drying device protective shell, the hollow spiral drying cylinder, the waste heat recovery heating cylinder, the flue gas circulation shaft, the sludge mixing treatment device and the secondary sludge drying and conveying device are all arranged in the partition drying device protective shell, and a spiral dry sludge discharge port is formed in the partition drying device protective shell close to the second end of the belt type sludge drying and conveying device.
Preferably, the inner cavity of the protective shell of the partition drying device is communicated with the tail gas recovery system through a pipeline.
Preferably, the tail gas recovery system comprises a tail gas condensing device and a tail gas biological treatment device which are connected in sequence.
Preferably, the heat medium is waste heat flue gas at 130-180 ℃ or waste steam at 110-150 ℃.
The beneficial effects of the invention are as follows:
1. the invention relates to a partition sludge drying device which consists of a hollow spiral drying cylinder, a forming device and a belt type drying conveying device. The sludge drying realizes the partition drying on one device, namely the hollow spiral drying cylinder is adopted to improve the heat exchange efficiency with the water content of 80-60 percent, and the belt type drying device is adopted from 40 percent to full drying to avoid high conveying energy consumption.
2. According to the hollow spiral drying cylinder, waste heat flue gas or waste heat water of a thermal power plant is introduced into the hollow position and the outer side of the cylinder, so that sludge can be effectively dried in a wrapping manner, and heat transfer is more sufficient; compare simultaneously in traditional have axle spiral drying equipment sludge very easily in the adhesion of stirring roller seam crossing, consume the energy height and need the manual cleaning, adopt hollow spiral drying drum to separate stirring roller and center pin, make seam crossing no longer block mud, reduce and carry the energy consumption, the drying drum is placed in belt mummification device top parallel, but a plurality of equipment simultaneous workings, sludge is dried to the high efficiency more.
3. According to the invention, a heating device is arranged below the track of the belt type drying equipment, the heating device is composed of pipelines, adjacent pipelines are connected by a bendable heat-resistant hose, the pipelines of the hose are staggered, and according to drying heat transfer, sludge mass transfer coefficient and pollutant release characteristics, waste flue gas with the temperature of 130-180 ℃ or waste steam with the temperature of 110-150 ℃ is introduced at an inlet and can work simultaneously with the flue gas introduced below a drying cylinder, so that the sludge is dried and formed up and down simultaneously, and the sludge mass transfer and heat transfer effect is improved.
4. The wet sludge spiral feeder consists of three spirals, wherein the vertical spiral can adjust the feeding speed according to the sludge drying effect to ensure that the sludge enters the hollow spiral drying cylinder at a constant speed; the motor of the hollow spiral drying cylinder can adjust the rotating speed according to the sludge drying effect, so that the sludge is heated uniformly without the occurrence of shell clamping accidents.
5. According to the invention, the dry sludge with the moisture content of about 60% conveyed by the hollow spiral drying cylinder is effectively mixed with the powdery dry material added by the dry sludge spiral feeder, so that the moisture content of the sludge is reduced to about 40%, the maximum viscous region of the sludge with the moisture content of 40-60% is effectively avoided, the conveying energy consumption of a drying project is reduced, and the energy is saved.
6. The waste gas generated by sludge drying is introduced into the tail gas treatment device by the induced draft fan, so that the high-efficiency utilization of the waste water of the thermal power plant is realized, the tail gas treatment is realized, and the environment is protected.
7. The invention effectively utilizes the waste heat of the thermal power plant as a drying heat source, realizes the drying treatment of wet sludge through the circulating heat exchange of the flue gas, effectively utilizes the waste heat to reduce the cost of sludge drying, realizes the harmless treatment of the sludge and improves the economic benefit of project operation.
Drawings
FIG. 1 is a front view of a sludge drying system and apparatus utilizing waste heat from a thermal power plant according to the present invention.
FIG. 2 is a rear view of the sludge drying system and apparatus using waste heat of a thermal power plant according to the present invention
FIG. 3 is a top view of the sludge drying system and apparatus utilizing waste heat of a thermal power plant according to the present invention.
FIG. 4 is a schematic diagram showing the connection between the fixed rotating wheel and the heat-resistant hose in the system and apparatus for drying sludge using waste heat of a thermal power plant according to the present invention.
FIG. 5 is a schematic cross-sectional view of a thermal medium channel and a hollow spiral drying cylinder in the sludge drying system and apparatus using waste heat of a thermal power plant according to the present invention.
The reference numerals include:
1-partitioning a drying device protective shell; 2-a wet sludge feeding device; 3, a first motor; 4, a second motor; 5-hot medium channel; 6, a third motor; 7-a dry sludge feeding device; 8, motor four; 9-tail gas condensing equipment; 10-a tail gas biological treatment device; 11-motor five; 12-a fixed wheel; 13-belt type sludge drying and conveying device; 14-heat resistant hose; 15-a mud scraper; 16-spiral discharge port of dry sludge; 17-motor six; 18-hollow spiral drying cylinder; 19-flue gas circulation shaft; 20-sludge mixing machine; 21-sludge extrusion forming spiral; 22-drying device base; 23-gear one; 24-motor seven; 25-a sludge forming machine; 26-a support seat; 27-sludge drying tail gas pipeline;
a-a third cartridge; b-a second cartridge; c-a first barrel; d-wet sludge; e-dry active heating medium.
Detailed Description
In order to make the purpose, technical solution and advantages of the present technical solution clearer, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present teachings.
As shown in fig. 1 to 5, the present embodiment provides a sludge drying system and apparatus using waste heat of a thermal power plant, including a primary sludge drying device, a sludge mixing processing device, a secondary sludge drying and conveying device, and a tail gas recovery system, wherein the primary sludge drying device includes a sludge feeding device, a hollow spiral drying cylinder 18, a waste heat recovery heating cylinder, and a flue gas circulation shaft 19, wherein the hollow spiral drying cylinder 18 is horizontally disposed, the hollow spiral drying cylinder 18 is externally sleeved with the waste heat recovery heating cylinder flue gas circulation shaft 19, which is disposed at an axial center of the hollow spiral drying cylinder 18, the waste heat recovery heating cylinder and the flue gas circulation shaft 19 are communicated at a second end of the hollow spiral drying cylinder 18, an input end of the waste heat recovery heating cylinder and an output end of the flue gas circulation shaft 19 are both disposed at a first end of the hollow spiral drying cylinder 18, and the waste heat recovery heating cylinder and the flue gas circulation shaft 19 form a heat medium circulation channel to primarily dry sludge in the hollow spiral drying cylinder 18; a hollow spiral blade is arranged inside the hollow spiral drying cylinder 18, a motor IV 8 is arranged at the end face of the second end of the hollow spiral drying cylinder 18, and the power end of the motor IV 8 is connected with the hollow spiral blade to drive sludge in the hollow spiral drying cylinder 18 to be stirred and conveyed from the first end to the second end of the hollow spiral drying cylinder 18; the hollow spiral drying cylinder 18 is provided with a sludge output end and a tail gas recovery end near the second end, the sludge output end is connected with the input end of a sludge mixing processing device, and the output end of the sludge mixing processing device is connected with the input end of a sludge secondary drying and conveying device; the tail gas recovery end is connected with the input end of the tail gas recovery system.
Specifically, waste heat flue gas or hot water of a thermal power plant enters through a heat medium channel 5, the temperature is about 90-130 ℃, as shown in fig. 5, the heat medium channel 5 is located in the hollow spiral drying cylinder 18, enters between the second cylinder B and the third cylinder A, and is discharged from the first cylinder C to wrap the hollow spiral drying cylinder 18, the motor four 8 is located at the tail of the hollow spiral drying cylinder 18, the motor four 8 works to drive the hollow spiral blades to carry and turn wet sludge, the rotating speed of the hollow spiral blades can be adjusted according to the sludge drying condition to enable the sludge to be heated uniformly, the hollow spiral conveying is adopted to enable the conveyed sludge not to block or block equipment, and therefore conveying energy consumption is reduced. The waste flue gas or hot water heating medium circulates for a circle and is discharged by a first cylinder C of the spiral drying cylinder; the moisture content of the wet sludge is reduced to about 60 percent after the wet sludge is dried by the hollow spiral drying cylinder 18, and the wet sludge is mixed with dry sludge added by a dry sludge spiral feeding device at the tail part of the hollow spiral drying cylinder 18 and enters a sludge mixer 20 and then enters a sludge forming machine 25. As shown in fig. 5, a flow path for the drying heat medium E is formed inside the first drum C and between the second drum B and the third drum a, and a flow path for the wet sludge D is formed between the first drum C and the second drum B.
The sludge feeding device comprises a wet sludge feeding device 2 and a dry sludge feeding device 7, wherein the output end of the wet sludge feeding device 2 is connected to the first end of the hollow spiral drying cylinder 18, and the output end of the dry sludge feeding device 7 is connected to the second end of the hollow spiral drying cylinder 18. The wet sludge feeding device 2 is connected with a first end of a hollow spiral drying cylinder 18 of the partition sludge drying device, the dry sludge spiral feeding device is connected with the vicinity of a second end of the hollow spiral drying cylinder 18 of the partition sludge drying device, mixed sludge enters a sludge forming machine 25 and falls onto a lower belt type sludge drying conveying device 13 through extrusion forming, finally dried sludge is scraped by a sludge scraper 15 to obtain dried sludge, waste gas generated in the whole sludge drying process is conveyed into a tail gas condensing device 9 through a drying tail gas pipeline to condense and liquefy water, and uncondensed gas enters a biological treatment device to be treated.
The wet sludge feeding device 2 comprises a first feeding hopper, three groups of helical blades, a transmission device, a first motor 3 and a second motor 4, wherein the three groups of helical blades are all arranged in the first feeding hopper and are attached to the conical inner wall in the first feeding hopper, and the output end of the first motor 3 is in power connection with the three groups of helical blades through the transmission device and can drive the helical blades to rotate; the second motor 4 is connected with the three groups of helical blades through a transmission device and can drive the three groups of helical blades to revolve along the axis of the first feeding hopper. Wet sludge feed arrangement 2 is located 18 front positions of hollow spiral mummification drum of subregion sludge mummification device, it is wet among the sludge feed arrangement 2 that motor one 3 is located wet sludge feed arrangement 2 top, motor one 3 works and drives three helical blade and move respectively and can be according to mud viscosity regulation of rotation speed, motor two 4 also are located wet sludge feed arrangement 2 tops, motor two 4 works and drives three spiral and move around the center pin simultaneous movement, from the mud moisture content 80% left and right sides that the opening part added, it is comparatively thick, three screw axis rotates simultaneously and mutual independence can effectively will glue thick mud and all scrape down, do not keep the residuality, need not consume the manual work and clear up.
The dry sludge feeding device 7 comprises a second feeding hopper, an auger conveying blade and a motor III 6, wherein the auger conveying blade is arranged in the second feeding hopper, the output end of the motor III 6 is connected with the auger conveying blade, and the auger conveying blade extends to the lower output port of the second feeding hopper from the middle part of the second feeding hopper. In the dry sludge feeding device 7, a motor III 6 is positioned at the top of the dry sludge feeding device 7, the motor III 6 works to drive a helical blade to rotate, so that the powdery dry material is added to be mixed with sludge with the water content of about 60% in the hollow spiral drying cylinder, the mixture falls into a sludge mixing machine 20 below and then enters a sludge forming machine 25, and the water content of the mixed sludge is below 40%. The sludge with the water content of 40-60% has strong viscosity, so that the maximum viscosity area can be effectively avoided, the dried conveying energy consumption is reduced, and the energy is saved.
The sludge primary drying device has 2-4 groups. As shown in figure 3, the partition sludge drying equipment is provided with two hollow spiral drying cylinders 18, and is characterized in that the hollow spiral drying cylinders 18 are arranged in parallel, the two hollow spiral drying cylinders 18 can work respectively and do not interfere with each other, all generated sludge falls into a lower sludge forming machine 25, in actual work, 2-4 hollow spiral drying cylinders 18 can be arranged according to the widths of the lower sludge forming machine 25 and a belt type sludge drying conveying device 13, and the partition sludge drying equipment can realize independent drying functions.
Mud compounding processing apparatus is including being used for the mud mixing machine 20 with the mud fully stirred and being used for the mud extrusion after the preliminary drying to be the mud extrusion spiral 21 of strip, and the input of mud mixing machine 20 is connected with the mud output of the elementary drying device of mud, and the output setting of mud mixing machine 20 is in the top of mud extrusion spiral 21, and mud extrusion spiral 21 sets up the top at the first end of the secondary dry conveyor of mud. Specifically, in the sludge forming machine 25, a motor seven 24 is positioned at the tail of the sludge forming machine 25, a gear one 23 is meshed with a forming gear and is connected with the motor seven 24 in a staggered manner, the motor seven 24 works to drive the gear one 23 and the forming gear to move so that the sludge forming machine 25 starts to work, and sludge from the sludge mixing machine 20 is changed into a noodle shape through the forming machine and falls onto a conveying belt of the lower belt type sludge drying conveying device 13.
The main body of the secondary drying and conveying device is a belt type sludge drying and conveying device 13, a motor five 11 is used for driving the belt type sludge drying and conveying device 13 to rotate as a power device, the inside of the belt type sludge drying and conveying device 13 comprises a plurality of fixed rotating wheels 12, the inside of each fixed rotating wheel 12 is of a hollow tubular structure, the tubular structures of every two adjacent fixed rotating wheels 12 are connected through a heat-resisting hose 14, a channel which is sequentially connected is formed by the tubular structures inside the fixed rotating wheels 12, a heat medium is introduced into the channel, and a mud scraper 15 used for removing the mud on the conveying surface of the belt type sludge drying and conveying device 13 is arranged at the second end of the belt type sludge drying and conveying device 13 for secondary heating the mud conveyed by the conveying surface of the belt type sludge drying and conveying device 13 through the fixed rotating wheels 12. The belt type sludge drying and conveying device 13 comprises a fixed rotating wheel 12, a heat-resistant hose 14 and a supporting base. After the sludge falls to a conveyor belt of a belt type sludge drying and conveying device 13 by a forming machine, as shown in the fourth figure, a waste flue gas heat medium pipeline is arranged on an intermediate shaft of a fixed rotating wheel 12, adjacent pipelines are connected by a heat-resisting hose 14, a plurality of pipelines are parallelly placed and staggered, waste flue gas of a thermal power plant is introduced at an inlet, the temperature is about 110-150 ℃, the semi-dry formed sludge on the conveyor belt above is dried, the moisture content of the semi-dry formed sludge is reduced to be below 20%, waste gas in the drying process enters a tail gas condensing device 9 and a biological treatment device through a tail gas pipeline, when the sludge moves to the tail part of the belt type sludge drying and conveying device 13, a sludge scraper 15 scrapes the formed completely dry sludge, the sludge scraper 15 is placed below the inclined part of the belt type sludge drying and conveying device 13 and is used for scraping the dry sludge adhered to the conveyor belt to make the dry sludge fall to a sludge collecting part below, and the belt type sludge drying and conveying device 13 is supported by a supporting base. If the waste water of the thermal power plant is used to replace the waste flue gas, the temperature of the waste water is controlled to be about 130-180 ℃.
As shown in fig. 5, the sludge drying system and apparatus using waste heat of thermal power plant further include a partition drying device protective casing 1, the hollow spiral drying cylinder 18, the waste heat recovery heating cylinder, the flue gas circulation shaft 19, the sludge mixing processing device and the secondary sludge drying conveying device are all disposed in the partition drying device protective casing 1, and a dry sludge spiral discharge port 16 is disposed at a second end of the partition drying device protective casing 1 close to the belt type sludge drying conveying device 13. The dry sludge spiral discharge port 16 is directly connected with the partition drying device protective shell 1 to form an inclined surface to prevent sludge from gathering and blocking an outlet. Six 17 motors are located spiral discharge gate top, and six 17 motors work and drive the helical blade motion and derive the mud that scraper 15 scraped and collect the department to mud, and the exit places a plurality of helical blade simultaneous workings, effectively derives all mud, does not leave the relict, and whole mummification equipment is supported by mummification device base 22. The internal cavity of the partition drying device protective shell 1 and the tail gas recovery end of the hollow spiral drying cylinder 18 are communicated with a tail gas recovery system through a sludge drying tail gas pipeline 27.
The tail gas recovery system comprises a tail gas condensing device 9 and a tail gas biological treatment device 10 which are connected in sequence. The tail gas condensing device 9 and the tail gas biological treatment device 10 are positioned on the right side of the whole drying equipment, are connected with each part by a sludge drying tail gas pipeline 27 and are used for collecting waste water gas generated in the operation process of the treatment system and converting the waste water gas into H 2 O and CO 2 And when non-toxic and harmless gas is released, the lower outlet is used for discharging condensed water.
In this embodiment, the hollow spiral drying cylinder 18, the wet sludge feeding device 2 and the dry sludge feeding device 7 are all fixedly installed inside the partition drying device protective casing 1, and the belt type sludge drying conveying device 13 is fixed inside the partition drying device protective casing 1 through the supporting seat 26.
In the description of the present invention, it is to be understood that the terms "top", "front", "rear", "vertical", "horizontal", "up", "down", "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the scope of the present invention.
The foregoing is only a preferred embodiment of the present invention, and many variations in the specific embodiments and applications of the invention may be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the claims of this patent.
Claims (10)
1. The utility model provides an utilize sludge drying system and equipment of steam power plant waste heat which characterized in that: the sludge drying device comprises a sludge primary drying device, a sludge mixing treatment device, a sludge secondary drying and conveying device and a tail gas recovery system, wherein the primary drying device comprises a sludge feeding device, a hollow spiral drying cylinder, a waste heat recovery heating cylinder and a flue gas circulation shaft, the hollow spiral drying cylinder is horizontally arranged, the waste heat recovery heating cylinder flue gas circulation shaft is sleeved outside the hollow spiral drying cylinder and is arranged at the axle center of the hollow spiral drying cylinder, the waste heat recovery heating cylinder and the flue gas circulation shaft are communicated at the second end of the hollow spiral drying cylinder, the input end of the waste heat recovery heating cylinder and the output end of the flue gas circulation shaft are both arranged at the first end of the hollow spiral drying cylinder, and the waste heat recovery heating cylinder and the flue gas circulation shaft form a heat medium circulation channel so as to primarily dry sludge in the hollow spiral drying cylinder; a hollow spiral blade is arranged in the hollow spiral drying cylinder, a motor IV is arranged at the end face of the second end of the hollow spiral drying cylinder, and the power end of the motor IV is connected with the hollow spiral blade to drive sludge in the hollow spiral drying cylinder to be stirred and conveyed from the first end to the second end of the hollow spiral drying cylinder;
the hollow spiral drying cylinder is provided with a sludge output end and a tail gas recovery end near the second end, the sludge output end is connected with the input end of the sludge mixed material processing device, and the output end of the sludge mixed material processing device is connected with the input end of the sludge secondary drying and conveying device; the tail gas recovery end is connected with the input end of the tail gas recovery system.
2. The system and the apparatus for sludge drying using waste heat of thermal power plant as claimed in claim 1, wherein: sludge feeding device includes wet sludge feeding device and dry sludge feeding device, wet sludge feeding device's output is connected and is being close to the first end department of hollow spiral mummification drum, dry sludge feeding device's output is connected and is being close to the second end department of hollow spiral mummification drum.
3. The system and the equipment for drying sludge by using waste heat of a thermal power plant as claimed in claim 2, wherein: the wet sludge feeding device comprises a first feeding hopper, three groups of helical blades, a transmission device, a first motor and a second motor, wherein the three groups of helical blades are all arranged in the first feeding hopper and are attached to the conical inner wall in the first feeding hopper, and the output end of the first motor is in power connection with the three groups of helical blades through the transmission device and can drive the helical blades to rotate; the second motor is connected with the three groups of helical blades through a transmission device and can drive the three groups of helical blades to revolve along the axis of the first feed hopper;
dry mud feed arrangement includes second feeder hopper, auger delivery blade and motor three, and wherein the auger delivery blade sets up in the second feeder hopper, motor three's output with the auger delivery blade is connected, and the auger delivery blade extends to the lower part delivery outlet department of second feeder hopper by the middle part of second feeder hopper.
4. The system and the equipment for drying sludge by using waste heat of a thermal power plant as claimed in claim 1, wherein: the sludge primary drying device comprises 2-4 groups.
5. The system and the equipment for drying sludge by using waste heat of a thermal power plant as claimed in claim 1, wherein: mud compounding processing apparatus is including being used for the mud mixing machine with the mud extrusion after being used for preliminary drying with mud intensive mixing be the mud extrusion spiral of strip, the input of mud mixing machine with the mud output of the elementary drying device of mud is connected, and the output setting of mud mixing machine is in the top of mud extrusion spiral, mud extrusion spiral sets up the top at the first end of the secondary dry conveyor of mud.
6. The system and the apparatus for sludge drying using waste heat of thermal power plant as claimed in claim 1, wherein: the main body of the secondary drying and conveying device is a belt type sludge drying and conveying device, the belt type sludge drying and conveying device comprises a plurality of fixed rotating wheels, the fixed rotating wheels are hollow tubular structures, the tubular structures of two adjacent fixed rotating wheels are connected through a high-temperature-resistant bent hose, so that the tubular structures in the fixed rotating wheels form sequentially connected channels, and a heat medium is introduced into the channels to perform secondary heating on sludge conveyed by the conveying surface of the belt type sludge drying and conveying device through the fixed rotating wheels;
and a second end of the belt type sludge drying and conveying device is provided with a sludge scraper for removing sludge on the conveying surface of the belt type sludge drying and conveying device.
7. The system and the equipment for drying sludge by using waste heat of a thermal power plant according to any one of claims 1 to 6, wherein: still include subregion mummification device protective housing, hollow spiral mummification drum, waste heat recovery heating cylinder, flue gas circulation axle, mud compounding processing apparatus and secondary drying conveyor of mud all set up in subregion mummification device protective housing, subregion mummification device protective housing closes on belt sludge mummification conveyor's second end and is equipped with dry mud spiral discharge gate.
8. The system and the apparatus for sludge drying using waste heat of thermal power plant as claimed in claim 7, wherein: and the inner cavity of the protective shell of the partition drying device is communicated with the tail gas recovery system through a pipeline.
9. The system and the apparatus for sludge drying using waste heat of thermal power plant as claimed in claim 7, wherein: the tail gas recovery system comprises a tail gas condensing device and a tail gas biological treatment device which are sequentially connected.
10. The system and the apparatus for sludge drying using waste heat of thermal power plant as claimed in claim 1, wherein: the heat medium is waste heat flue gas at 130-180 ℃ or waste steam at 110-150 ℃.
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| CN202211439145.2A CN115745356A (en) | 2022-11-17 | 2022-11-17 | Sludge drying system and equipment utilizing waste heat of thermal power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117623582A (en) * | 2024-01-25 | 2024-03-01 | 湖南清源华建环境科技有限公司 | Superheated steam drying heat recovery sludge back mixing device, system and method |
-
2022
- 2022-11-17 CN CN202211439145.2A patent/CN115745356A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117623582A (en) * | 2024-01-25 | 2024-03-01 | 湖南清源华建环境科技有限公司 | Superheated steam drying heat recovery sludge back mixing device, system and method |
| CN117623582B (en) * | 2024-01-25 | 2024-04-26 | 湖南清源华建环境科技有限公司 | Superheated steam drying heat recovery sludge back mixing device, system and method |
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