CN112551854A - Municipal sludge drying treatment system - Google Patents
Municipal sludge drying treatment system Download PDFInfo
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- CN112551854A CN112551854A CN202011311534.8A CN202011311534A CN112551854A CN 112551854 A CN112551854 A CN 112551854A CN 202011311534 A CN202011311534 A CN 202011311534A CN 112551854 A CN112551854 A CN 112551854A
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- sludge
- municipal sludge
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- 239000010802 sludge Substances 0.000 title claims abstract description 209
- 238000001035 drying Methods 0.000 title claims abstract description 126
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000003546 flue gas Substances 0.000 claims abstract description 55
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 47
- 239000002918 waste heat Substances 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims description 59
- 239000010865 sewage Substances 0.000 claims description 24
- 238000004332 deodorization Methods 0.000 claims description 15
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 239000013589 supplement Substances 0.000 claims description 7
- 239000008234 soft water Substances 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims 4
- 239000002689 soil Substances 0.000 abstract description 12
- 230000009467 reduction Effects 0.000 abstract description 6
- 239000003337 fertilizer Substances 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 abstract description 4
- 238000010981 drying operation Methods 0.000 abstract description 2
- 230000003020 moisturizing effect Effects 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 7
- 230000032258 transport Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a municipal sludge drying treatment system, which relates to the technical field of sludge treatment and comprises a flue gas heat exchange device, a wet material storage and conveying device, a sludge drying machine and a dry material storage and conveying device, wherein waste heat in industrial flue gas is recovered through the flue gas heat exchange device, the heat is transferred to a sludge drying machine, the sludge drying machine dries municipal sludge by using the heat, the dried municipal sludge is conveyed to the dry material storage and conveying device for storage, the drying operation is carried out by using the waste heat in the industrial flue gas, so that energy is recycled, energy is saved, meanwhile, the content of harmful organisms in soil can be reduced in the drying process, the water content of the dried municipal sludge is greatly reduced, the volume is greatly reduced, the reduction and the harmlessness are realized, in addition, the dried sludge is convenient to transport and store, and the calorific value, The soil property is good, and the soil can be reused as fuel, fertilizer and the like, so that the municipal sludge is recycled.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a municipal sludge drying treatment system.
Background
For municipal sludge produced in cities, the conventional treatment mode at present is 'mechanical dehydration + centralized landfill', namely the municipal sludge is simply mechanically drained and then conveyed to a specified place by a sewage conveying vehicle for landfill, the municipal sludge is large in size and low in transportation efficiency due to the fact that mechanical drainage cannot be fully dewatered (the water content is up to more than 80%), meanwhile, a large amount of microorganisms, germs, ova and the like contained in the municipal sludge can affect the environment when the municipal sludge is directly buried, the municipal sludge is high in self heat value and good in soil quality, and the direct landfill can cause resource waste.
Disclosure of Invention
The invention aims to provide a municipal sludge drying treatment system, which can utilize waste heat in industrial flue gas to dry municipal sludge, greatly reduce the volume of the treated municipal sludge, reduce the content of harmful organisms in soil and realize reduction, harmlessness and recycling.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a municipal sludge drying treatment system, which comprises a flue gas heat exchange device, a wet material storage and conveying device, a sludge drying machine and a dry material storage and conveying device, wherein the flue gas heat exchange device is connected with the sludge drying machine and used for recovering waste heat in industrial flue gas and transferring heat to the sludge drying machine, the wet material storage and conveying device is connected with the sludge drying machine and used for storing municipal sludge and conveying the municipal sludge to the sludge drying machine, the sludge drying machine is connected with the dry material storage and conveying device and used for drying the municipal sludge conveyed by the wet material storage and conveying device, and the dry material storage and conveying device is used for outputting the dried municipal sludge from the sludge drying machine and storing the sludge.
In optional embodiment, municipal sludge drying processing system still includes cooling heat transfer equipment, cooling heat transfer equipment with the sludge drying machine is connected for cool off the hot-air that produces in the sludge drying machine to form condensation sewage.
In optional embodiment, cooling indirect heating equipment includes closed cooling tower and cooling coil, cooling coil with the sludge drying machine is connected, the delivery port of closed cooling tower with cooling coil's water inlet is connected, cooling coil's delivery port with the water inlet of closed cooling tower is connected, so that the closed cooling tower with cooling coil constitutes the cooling cycle pipeline.
In an optional embodiment, the municipal sludge drying treatment system further comprises a condensation sewage treatment device, wherein the condensation sewage treatment device is connected with the sludge drying machine and is used for treating the condensation sewage generated in the sludge drying machine.
In the optional embodiment, municipal sludge drying processing system still includes biological deodorization equipment, biological deodorization equipment with the sludge drying machine is connected, is used for the foul smell that the sludge drying machine produced handles.
In optional embodiment, wet material storage conveying equipment includes the wet feed bin of transfer, stores wet feed bin, screw conveyer and screw rod pump sending pipeline, the wet feed bin of transfer sets up under ground for the holding is emptyd municipal sludge, the wet feed bin of storage sets up on subaerial, is used for the storage municipal sludge, screw conveyer simultaneously with the wet feed bin of transfer with the feed inlet of the wet feed bin of storage is connected, be used for with in the wet feed bin of transfer municipal sludge promotes to the wet feed bin of storage, screw rod pump sending pipeline simultaneously with the discharge gate of the wet feed bin of storage with the feed inlet of sludge drying machine is connected, be used for with in the wet feed bin of storage municipal sludge is carried extremely sludge drying machine.
In an optional embodiment, the dry material storage and conveying equipment comprises a dry material bin and a scraper conveyor, wherein the scraper conveyor is respectively connected with the discharge port of the sludge drying machine and the dry material bin and is used for conveying the dried municipal sludge to the dry material bin.
In optional embodiment, the sludge drying machine includes casing, conveying mesh belt, make-up machine and circulating fan, conveying mesh belt with the make-up machine all sets up in the casing, the make-up machine with wet material storage conveying equipment is connected, and sets up conveying mesh belt's pan feeding end, be used for with tile behind the municipal administration mud shaping on the conveying mesh belt, flue gas heat transfer equipment with the casing is connected, circulating fan sets up on the inner wall of casing, be used for with the process air after flue gas heat transfer equipment heating is carried extremely conveying mesh belt.
In an optional embodiment, the flue gas heat exchange equipment includes waste heat exchanger, heat exchange coil, water knockout drum, water collector and hot water circulating pump, waste heat exchanger is used for retrieving waste heat in the industry flue gas, heat exchange coil with the sludge drying machine is connected, the delivery port of water knockout drum with waste heat exchanger's water inlet passes through pipe connection, waste heat exchanger's delivery port with the water inlet of water collector passes through pipe connection, the water inlet of water collector with heat exchange coil's water inlet passes through pipe connection, heat exchange coil's delivery port with the water inlet of water knockout drum passes through pipe connection, the hot water circulating pump sets up heat exchange coil with on the pipeline between the water knockout drum.
In optional embodiment, flue gas indirect heating equipment still includes frequency conversion level pressure moisturizing device, frequency conversion level pressure moisturizing device includes softened water tank, mechanical filter and moisturizing level depressor, softened water tank's delivery port with the water inlet of moisturizing level depressor passes through the pipe connection, mechanical filter sets up the softened water tank with on the pipeline between the moisturizing level depressor, the delivery port of moisturizing level depressor pass through the pipe connection in heat exchange coil with pipeline between the water knockout drum.
The beneficial effects of the embodiment of the invention include, for example:
according to the municipal sludge drying treatment system provided by the embodiment of the invention, waste heat in industrial flue gas is recovered through the flue gas heat exchange equipment, the heat is transferred to the sludge dryer, the sludge dryer is used for drying municipal sludge by using the heat, the dried municipal sludge is conveyed to the dry material storage and conveying equipment for storage, and drying operation is carried out by using the waste heat in the industrial flue gas, so that energy is recycled, energy is saved, the content of harmful organisms in soil can be reduced in the drying process, the water content of the dried municipal sludge is greatly reduced, the volume is greatly reduced, reduction and harmlessness are realized, in addition, the dried sludge is convenient to transport and store, the heat value and the soil quality are good, and the sludge can be used as fuel, fertilizer and the like for reutilization, so that the municipal sludge is recycled.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of the overall structure of a municipal sludge drying treatment system according to an embodiment of the invention;
FIG. 2 is a schematic view of a connection structure of the sludge drying machine in FIG. 1;
FIG. 3 is a schematic structural view of the sludge dryer in FIG. 1;
FIG. 4 is a schematic structural view of the flue gas heat exchange device in FIG. 1;
fig. 5 is a schematic structural diagram of the cooling heat exchange device in fig. 1.
Icon: 100-a municipal sludge drying treatment system; 110-flue gas heat exchange equipment; 111-waste heat exchanger; 113-heat exchange coil; 115-a water separator; 117-water collector; 118-hot water circulation pump; 119-a variable-frequency constant-pressure water replenishing device; 1191-soft water tank; 1193-mechanical filter; 1195-supplement water pressure setting device; 130-wet material storage and conveying equipment; 131-a wet transfer bin; 133-storage wet silo; 135-a screw conveyor; 137-screw pumping duct; 150-sludge drier; 151-a housing; 153-a mesh belt; 155-a forming machine; 157-circulating fan; 160-dry material storage and conveying equipment; 161-dry stock bin; 163-scraper conveyor; 170-cooling the heat exchange equipment; 171-closed cooling tower; 173-a cooling coil; 180-condensation sewage treatment equipment; 190-biological deodorization equipment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
As disclosed in the background, municipal sludge produced in cities of the prior art, which is typically subjected to simple mechanical dewatering and then transported by transport vehicles to landfills for sequestration, is environmentally undesirable despite its low cost. The municipal sludge has high water content and large volume, and the landfill site is generally far away, so that the transportation is difficult, a large amount of time is consumed for transportation, the transportation cost is increased, a large amount of humus, organic matters and the like in the municipal sludge cause high heat value and good soil quality, and the resources are wasted by direct burial.
In order to solve the above problems, the embodiment provides a municipal sludge drying treatment system 100, which can utilize the residual heat in the industrial flue gas to dry the municipal sludge, so that the volume of the treated municipal sludge is greatly reduced, the content of harmful organisms in the soil can be reduced, and reduction, harmlessness and recycling are realized. It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment
Referring to fig. 1 to 5, the present embodiment provides a municipal sludge drying treatment system 100, which can utilize waste heat in industrial flue gas to dry municipal sludge, so that the waste heat is reused, energy is saved, the volume of the treated municipal sludge is greatly reduced, transportation and storage are facilitated, the content of harmful organisms in soil can be reduced, the water content is low, the treated sludge can be used as fertilizer or fuel, and reduction, harmlessness and recycling are achieved.
The municipal sludge drying treatment system 100 provided by this embodiment includes a flue gas heat exchange device 110, a wet material storage and transportation device 130, a sludge drying machine 150, a dry material storage and transportation device 160, a cooling heat exchange device 170, a condensed sewage treatment device 180, and a biological deodorization device 190, the flue gas heat exchange device 110 is connected to the sludge drying machine 150 for recovering waste heat in industrial flue gas and transferring heat to the sludge drying machine 150, the wet material storage and transportation device 130 is connected to the sludge drying machine 150 for storing municipal sludge and transferring the municipal sludge to the sludge drying machine 150, the sludge drying machine 150 is connected to the dry material storage and transportation device 160 for drying the municipal sludge transferred by the wet material storage and transportation device 130, and the dry material storage and transportation device 160 is used for outputting the dried municipal sludge from the inside of the sludge drying machine 150 and storing the dried municipal sludge. The cooling and heat exchanging device 170 is connected to the sludge drying machine 150, and is configured to cool the hot air generated in the sludge drying machine 150 to form condensed sewage. The condensed sewage treatment device 180 is connected to the sludge drying machine 150 and is used for treating condensed sewage generated in the sludge drying machine 150. The biological deodorization device 190 is connected to the sludge drying machine 150, and is used for treating odor generated by the sludge drying machine 150.
In this embodiment, the flue gas heat exchange device 110 is installed at the industrial flue gas discharge pipeline and is connected with the sludge drying machine 150 through a pipeline. For example, the flue gas heat exchange device 110 is installed at a flue gas discharge pipeline of an electrolytic aluminum plant, and can recycle heat in industrial flue gas generated by the electrolytic aluminum plant, and transfer the heat to the sludge drying machine 150 through a heat medium, so as to dry municipal sludge inside the sludge drying machine 150. Of course, the flue gas heat exchange device 110 can be installed on other factories or flue pipes with industrial flue gas, and is not limited in detail here.
The wet material storage and conveying equipment 130 comprises a transfer wet bin 131, a storage wet bin 133, a screw conveyor 135 and a screw pumping pipeline 137, wherein the transfer wet bin 131 is arranged below the ground and used for containing dumped municipal sludge, the storage wet bin 133 is arranged above the ground and used for storing the municipal sludge, the screw conveyor 135 is simultaneously connected with feed inlets of the transfer wet bin 131 and the storage wet bin 133 and used for lifting the municipal sludge in the transfer wet bin 131 to the storage wet bin 133, and the screw pumping pipeline 137 is simultaneously connected with a discharge outlet of the storage wet bin 133 and a feed inlet of a sludge drying machine 150 and used for conveying the municipal sludge in the storage wet bin 133 to the sludge drying machine 150.
In this embodiment, the wet feed bin 131 of transfer is the opening setting to be provided with on the opening and to open and shut ground lid, when the transport vechicle transports municipal sludge to the wet feed bin 131 department of transfer, ground lid is opened, and the transport vechicle pours municipal sludge into the wet feed bin 131 of transfer, and municipal sludge in the wet feed bin 131 of transfer upwards sends into under screw lifting action of screw conveyer 135 and stores in the wet feed bin 133 temporarily. Specifically, the screw conveyor 135 is disposed at the bottom of the wet intermediate transferring bin 131 and connected to the wet storage bin 133 through a pipe, wherein the screw conveyor 135 may refer to an existing screw conveying apparatus and will not be described in detail herein.
In this embodiment, in order to avoid leakage of odor and prevent external rainwater from entering the transfer moisture bin 131, a transfer box shed is installed on the ground around the transfer moisture bin 131, a transfer chamber is formed inside the transfer box shed, and an openable gate is provided through which a transport vehicle can enter and exit the transfer chamber.
In this embodiment, a screw pumping pipeline 137 is disposed between the wet storage bin 133 and the sludge drying machine 150, and a screw pump is disposed at the bottom of the wet storage bin 133 and connected to the screw pumping pipeline 137 to convey the municipal sludge stored in the wet storage bin 133 to the sludge drying machine 150 for drying.
The dry material storage and conveying equipment 160 comprises a dry material bin 161 and a scraper conveyor 163, wherein the scraper conveyor 163 is respectively connected with a discharge port of the sludge drying machine 150 and the dry material bin 161 and is used for conveying the dried municipal sludge to the dry material bin 161. Specifically, scraper conveyor 163 is connected with sludge drying machine 150 to be connected with dry feed bin 161 through the pipeline, can carry the municipal sludge that the moisture content is lower after the stoving is accomplished to dry feed bin 161.
In this embodiment, the sludge drying machine 150 includes a housing 151, a conveying mesh belt 153, a forming machine 155 and a circulating fan 157, the conveying mesh belt 153 and the forming machine 155 are both disposed in the housing 151, the forming machine 155 is connected to the wet material storage and conveying device 130 and disposed at a feeding end of the conveying mesh belt 153, and is configured to form the municipal sludge and then spread the sludge on the conveying mesh belt 153, the flue gas heat exchanger 110 is connected to the housing 151, and the circulating fan 157 is disposed on the housing 151 and is configured to convey the air heated by the flue gas heat exchanger 110 to the conveying mesh belt 153.
It should be noted that, in this embodiment, the volume of the moisture transferring bin 131 is 30m3The storage wet bin 133 has a volume of 120m3The water content of the municipal sludge transported to the wet transfer bin 131 by the transport vehicle is 80% or more, and the water content of the dried municipal sludge is 30% or less, wherein the water content can be adjusted by controlling the length of the conveying mesh belt 153 and the heating temperature of the flue gas heat exchange device 110. During actual drying, wet sludge with the water content of 80% is lifted to a wet storage bin 133 from a wet transfer bin 131 through a screw conveyor 135, is conveyed to a sludge drying machine 150 through a screw pump, enters municipal sludge of the sludge drying machine 150, is molded through a molding machine 155 and then is flatly laid on a conveying mesh belt 153, heated dry hot air at about 70 ℃ is contacted with the wet sludge through the conveying mesh belt 153 to become wet hot air, moisture in the municipal sludge is taken away, and the wet hot air is cooled to about 40 ℃ through a cooling heat exchange device 170 and becomes saturated cold airIn the process, the moisture in the hot and humid air is condensed into a liquid state and discharged to the condensed sewage treatment apparatus 180 in the form of condensed sewage for treatment. And the saturated cold air at about 40 ℃ is conveyed to the flue gas heat exchange equipment 110 through a pipeline, the temperature is increased to dry hot air at about 70 ℃ again under the heating action of the flue gas heat exchange equipment 110, and the dry hot air is conveyed to the conveying mesh belt 153 through the circulating fan 157 to perform a circulating dehumidification and drying process. Wherein conveying mesh belt 153 is the multilayer, and the mud after the shaping is dried to the moisture content below 30% through multilayer conveying mesh belt 153, and the mud after the mummification is through ejection of compact to scraper conveyor 163, through scraper conveyor 163 conveying to dry feed bin 161 and temporarily store, accomplishes the stoving of mud.
It is noted that the wet transfer bin 131, the wet storage bin 133, the sludge drying machine 150 and the dry storage bin 161 together form a sludge drying system, so as to dry the sludge. Wherein, the wet storage bin 133 and the dry storage bin 161 are both accommodated in the factory building, so as to avoid the leakage of odor.
In the present embodiment, two sludge drying machines 150 are provided, and the daily processing capacity of each sludge drying machine 150 is 50 tons, but the sludge drying machines 150 may be one or three, and the like, and are not limited specifically herein.
In this embodiment, the sludge drying machine 150 is connected to the cooling heat exchanger 170 and the flue gas heat exchanger 110 through a set of heat exchange circulation pipes, and realizes heat transfer. Specifically, the air in the heat exchange circulation pipeline is heated to 70 ℃ by the flue gas heat exchange device 110 to form high-heat dry air to dry the sludge on the conveying mesh belt 153, take away the moisture of the sludge, and then is cooled to 40 ℃ by the cooling heat exchange device 170 to form circulation.
In this embodiment, the cooling heat exchanging device 170 includes a closed cooling tower 171 and a cooling coil 173, the cooling coil 173 is connected to the sludge drying machine 150, a water outlet of the closed cooling tower 171 is connected to a water inlet of the cooling coil 173, and a water outlet of the cooling coil 173 is connected to a water inlet of the closed cooling tower 171, so that the closed cooling tower 171 and the cooling coil 173 form a cooling circulation pipeline. Specifically, adopt no filler closed cooling tower 171 as cooling heat transfer system, be equipped with the cooling water in the closed cooling tower 171, realize the heat exchange between cooling coil 173 and the heat transfer circulating line for the moist hot air heating of cooling cycle drinking cup in the cooling coil 173, the cooling cycle water after the heating is through the cooling back of closed circulation cooling tower, again through cooling coil 173 to the moist hot air condensation, so the circulation is reciprocal. Meanwhile, the closed cooling tower 171 is supplemented with water by a main water tank, and drained water enters a plant drainage pipe network, so that the closed cooling tower 171 has a remarkable water-saving effect.
In this embodiment, the flue gas heat exchange device 110 includes a waste heat exchanger 111, a heat exchange coil 113, a water separator 115, a water collector 117 and a hot water circulating pump 118, the waste heat exchanger 111 is used for recovering waste heat in industrial flue gas, the heat exchange coil 113 is connected with the sludge drying machine 150, a water outlet of the water separator 115 is connected with a water inlet of the waste heat exchanger 111 through a pipeline, a water outlet of the waste heat exchanger 111 is connected with a water inlet of the water collector 117 through a pipeline, a water inlet of the water collector 117 is connected with a water inlet of the heat exchange coil 113 through a pipeline, a water outlet of the heat exchange coil 113 is connected with a water inlet of the water separator 115 through a pipeline, and the hot water circulating pump 118 is disposed on a.
Further, for the moisturizing, flue gas heat exchange equipment 110 still includes frequency conversion level pressure moisturizing device 119, frequency conversion level pressure moisturizing device 119 includes softened water tank 1191, mechanical filter 1193 and moisturizing level pressure ware 1195, softened water tank 1191's delivery port passes through the pipe connection with the water inlet of moisturizing level pressure ware 1195, mechanical filter 1193 sets up on the pipeline between softened water tank 1191 and moisturizing level pressure ware 1195, the delivery port of moisturizing level pressure ware 1195 passes through the pipeline of pipe connection between heat transfer coil 113 and water knockout drum 115.
In this embodiment, the waste heat exchanger 111 is installed on a discharge pipe of industrial flue gas, softened water is used as a heat transfer medium, and the softened water in the waste heat exchanger 111 is heated to about 95 ℃ after heat exchange with flue gas. Specifically, the number of the waste heat exchangers 111 is 6, the waste heat exchangers are respectively installed on different flue gas discharge pipes, 95 ℃ hot water generated by the waste heat exchangers 111 is respectively collected to a water collector 117 from far and near pipelines from the 6 waste heat exchangers 111, and then is connected to a heat exchange coil 113 installed on a sludge drying machine 150 through a pipeline by the water collector 117, 70 ℃ return water generated by heat exchange between the heat exchange coil 113 and a heat exchange circulating pipeline is sent to an inlet of a hot water circulating pump 118 after system impurities are removed through a filter, and is sent to a water separator 115 after being pressurized by the hot water circulating pump 118, so that the pressure of the system is balanced and the system is convenient to adjust, the water separator 115 sends out two main pipelines which are respectively connected to the near end waste heat exchangers 111 and the far end waste heat exchangers 111.
The water supplemented by the heat exchange system is softened by the water treatment system through the plant area water supply, and then is supplemented to the hot water system pipe network by adopting the variable-frequency constant-pressure water supplementing device 119, so that the production requirement is maintained.
In this embodiment, odor is also generated during the sludge drying process, and in order to avoid leakage of odor, a drying plant is also installed on the ground around the sludge drying machine 150, or odor generated during the sludge drying process can be treated in a high-concentration and low-concentration manner according to the division of functional sections of the production plant. For a drying factory building and a dry and wet material storehouse factory building, the designed ventilation frequency is 8 times/h, and 1 set of designed deodorization air quantity is 80000m3The biological deodorization equipment 190 for processing the low-concentration odor generated in the space is matched with the deodorization air pipe to maintain the negative pressure state in the factory building. For dry and wet material storehouse plants and newly-built sludge drying machine 150 plants, air holes and air exhaust holes are reserved in the equipment, the designed ventilation frequency is 10 times/h, and 1 set of designed deodorization air volume is 30000m3The biological deodorization device 190 of/h treats the high concentration odor generated from the space. After treatment, the odor emission generated in the sludge drying process reaches the emission limit value of the emission Standard of malodorous pollutants (GB 14554-93).
It should be noted that the structure and deodorizing principle of the bio-deodorizing device 190 in the present embodiment can be referred to the existing deodorizing device, and will not be described in detail herein.
In the present embodiment, the condensed sewage treatment apparatus 180 mainly treats the condensed sewage generated by the sludge drying machine 150 and the drainage of the biological deodorization apparatus 190. The condensed sewage treatment designed in the embodiment adopts integrated equipment, and is built once according to the wet sludge treatment amount of 300t/d in total scale. In the sludge drying process, the dewatering amount of wet sludge is 214.28t/d, the drainage amount of the biological deodorization tower is 12t/d, so the total amount of production wastewater generated in the whole project is 271.5t/d, and the design is finally carried out according to the treatment scale of 300 t/d. The effluent of the treated sewage needs to reach the first class B standard of pollutant discharge Standard of urban Sewage treatment plant (GB 18918-2002).
It should be noted that the structure and sewage treatment principle of the condensed sewage treatment apparatus 180 in this embodiment may refer to an existing deodorization apparatus, and will not be described in detail herein.
In summary, in the municipal sludge drying treatment system 100 provided by this embodiment, the moisture content of the municipal sludge entering the plant is about 80%, the municipal sludge is discharged from the totally enclosed sludge truck, enters the transfer wet bin 131, is conveyed to the storage wet bin 133 by the screw elevator for short-term storage, is pumped into the sludge dryer 150 by the screw pump, the moisture content of the sludge dried by the sludge dryer 150 reaches below 30%, and is input into the high-level dry bin 161 by the scraper conveyor 163 for storage, and is then transported to the qualified unit for treatment, in the whole treatment process, the flue gas heat exchange device 110 provides the heat source required for drying for the sludge drying host, and the matched softening and water replenishing device replenishes the heat transfer medium (the item is softened water); a matched cooling system is adopted to cool the high-temperature high-humidity gas generated in the sludge drying process, and the formed condensed sewage is treated by the integrated condensed sewage treatment equipment 180 to reach the standard; and (3) treating malodorous gas generated in the sludge drying process by adopting a biological deodorization system. Retrieve the waste heat in the industry flue gas through flue gas heat transfer equipment 110, and with heat transfer to sludge drier, sludge drier 150 utilizes this heat stoving municipal sludge, municipal sludge after the stoving is carried to drier storage conveyor 160 and is stored, dry operation is dried through the waste heat that utilizes in the industry flue gas, make the energy obtain recycle, the energy has been practiced thrift, can reduce harmful organism content in the soil simultaneously in the stoving process, and municipal sludge moisture content greatly reduced after the stoving, the volume reduces by a wide margin, reduction and innoxiousness have been realized, in addition, the sludge transportation after the stoving, the storage is convenient, and the calorific value, soil property is better, can regard as fuel, fertilizer etc., carry out the reuse, realize the resourceful of municipal sludge.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a municipal sludge drying processing system, its characterized in that, includes flue gas heat transfer equipment, wet material storage conveyor, sludge drying machine and dry material storage conveyor, flue gas heat transfer equipment with sludge drying machine connects for retrieve the waste heat in the industry flue gas, and with heat transfer extremely sludge drying machine, wet material storage conveyor with sludge drying machine connects for save municipal sludge, and will municipal sludge carries extremely sludge drying machine, sludge drying machine with dry material storage conveyor connects, be used for the stoving by wet material storage conveyor carries municipal sludge, dry material storage conveyor is used for after will drying municipal sludge follows sludge drying machine exports to outside to the storage.
2. The municipal sludge drying treatment system according to claim 1, further comprising a cooling heat exchange device connected to the sludge drying machine for cooling the hot air generated in the sludge drying machine to form condensed sewage.
3. The municipal sludge drying treatment system according to claim 2, wherein the cooling heat exchange device comprises a closed cooling tower and a cooling coil, the cooling coil is connected to the sludge drying machine, the water outlet of the closed cooling tower is connected to the water inlet of the cooling coil, and the water outlet of the cooling coil is connected to the water inlet of the closed cooling tower, so that the closed cooling tower and the cooling coil form a cooling circulation pipeline.
4. The municipal sludge drying treatment system according to claim 2, further comprising a condensation sewage treatment device connected to the sludge drying machine for treating the condensation sewage generated in the sludge drying machine.
5. The municipal sludge drying treatment system according to claim 4, further comprising a biological deodorization device connected to the sludge drying machine for processing odor generated by the sludge drying machine.
6. The municipal sludge drying treatment system according to any one of claims 1 to 5, wherein the sludge drying treatment system comprises a sludge drying treatment tank, the wet material storage and conveying equipment comprises a wet material transferring bin, a wet material storage bin, a screw conveyor and a screw pumping pipeline, wherein the wet material transferring bin is arranged under the ground, and is used for containing the dumped municipal sludge, the wet storage bin is used for being arranged above the ground, and is used for storing the municipal sludge, the screw conveyer is simultaneously connected with the feed inlets of the intermediate wet transferring bin and the wet storing bin, the screw rod pumping pipeline is simultaneously connected with a discharge hole of the storage wet bin and a feed inlet of the sludge drying machine, and is used for conveying the municipal sludge in the storage wet bin to the sludge drying machine.
7. The municipal sludge drying treatment system according to any one of claims 1 to 5, wherein the dry material storage and conveying equipment comprises a dry material bin and a scraper conveyor, and the scraper conveyor is connected with a discharge port of the sludge drying machine and the dry material bin respectively and is used for conveying the dried municipal sludge to the dry material bin.
8. The municipal sludge drying treatment system according to any one of claims 1 to 5, wherein the sludge drying machine comprises a housing, a conveying mesh belt, a forming machine and a circulating fan, the conveying mesh belt and the forming machine are both arranged in the housing, the forming machine is connected with the wet material storage and conveying equipment and arranged at a feeding end of the conveying mesh belt, the forming machine is used for forming the municipal sludge and then flatly laying the formed municipal sludge on the conveying mesh belt, the flue gas heat exchange equipment is connected with the housing, and the circulating fan is arranged on the housing and used for conveying air heated by the flue gas heat exchange equipment to the conveying mesh belt.
9. The municipal sludge drying treatment system according to any one of claims 1 to 5, wherein the flue gas heat exchange device comprises a waste heat exchanger, a heat exchange coil, a water separator, a water collector and a hot water circulating pump, the waste heat exchanger is used for recovering waste heat in the industrial flue gas, the heat exchange coil is connected with the sludge drying machine, a water outlet of the water separator is connected with a water inlet of the waste heat exchanger through a pipeline, a water outlet of the waste heat exchanger is connected with a water inlet of the water collector through a pipeline, a water inlet of the water collector is connected with a water inlet of the heat exchange coil through a pipeline, a water outlet of the heat exchange coil is connected with a water inlet of the water separator through a pipeline, and the hot water circulating pump is arranged on a pipeline between the heat exchange coil and the water separator.
10. The municipal sludge drying treatment system according to claim 9, wherein the flue gas heat exchange equipment further comprises a variable frequency constant pressure water supplement device, the variable frequency constant pressure water supplement device comprises a soft water tank, a mechanical filter and a water supplement pressure stabilizer, the water outlet of the soft water tank is connected with the water inlet of the water supplement pressure stabilizer through a pipeline, the mechanical filter is arranged on the soft water tank and the water supplement pressure stabilizer, the water outlet of the water supplement pressure stabilizer is connected with the heat exchange coil pipe and the pipeline between the water distributors through a pipeline.
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| CN202011311534.8A CN112551854A (en) | 2020-11-20 | 2020-11-20 | Municipal sludge drying treatment system |
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| CN202011311534.8A CN112551854A (en) | 2020-11-20 | 2020-11-20 | Municipal sludge drying treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473341A (en) * | 2020-05-22 | 2020-07-31 | 常州英科环境科技有限公司 | Mechanical rotary sludge incineration system and working method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473341A (en) * | 2020-05-22 | 2020-07-31 | 常州英科环境科技有限公司 | Mechanical rotary sludge incineration system and working method |
Non-Patent Citations (1)
| Title |
|---|
| 李登新: "《<固体废物处理与处置>工程素质综合训练》", 31 August 2019, 中国环境出版社 * |
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Application publication date: 20210326 |