CN219929898U - Sludge drying treatment system - Google Patents
Sludge drying treatment system Download PDFInfo
- Publication number
- CN219929898U CN219929898U CN202320643265.8U CN202320643265U CN219929898U CN 219929898 U CN219929898 U CN 219929898U CN 202320643265 U CN202320643265 U CN 202320643265U CN 219929898 U CN219929898 U CN 219929898U
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- Prior art keywords
- sludge
- treatment system
- sludge drying
- drying treatment
- heating device
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- 239000010802 sludge Substances 0.000 title claims abstract description 78
- 238000001035 drying Methods 0.000 title claims abstract description 47
- 239000000428 dust Substances 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000005406 washing Methods 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000003518 caustics Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 18
- 239000002956 ash Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The utility model discloses a sludge drying treatment system, which comprises a sludge drying machine, wherein a wet sludge feed inlet, an air inlet, a dry sludge discharge outlet and a wet gas outlet are arranged on the sludge drying machine; the wet gas outlet is sequentially connected with a first heating device and a dust removing device. Further, a second heating device is arranged at the ash bucket at the bottom of the dust removing device. The air inlet is provided with a second heating device; the first heating device is connected with the second heating device. The utility model solves the problems of dust remover adhesion and blockage existing in the existing sludge drying treatment system.
Description
Technical Field
The utility model belongs to the technical field of sludge treatment, and particularly relates to a novel sludge drying treatment system.
Background
The sludge drying technology realizes the reduction by heating and drying the sludge and reducing the water content. The traditional sludge drying is natural air drying by using a storage yard, and a plurality of sludge drying technologies are heat drying technologies at home and abroad, and common sludge drying equipment such as fluidized bed drying, disc drying, blade drying, belt drying and the like are adopted.
The heat drying technology has the advantages of high speed and good effect, adopts primary energy sources such as steam, hot air and the like, but under the disturbance of the dryer, the exhaust steam at the outlet of the dryer contains a large amount of small particle dust, and the dust is easy to adhere to the inner wall of a flue before entering the cyclone dust collector to cause blockage due to high humidity and low temperature of the exhaust steam, so that a drying system is frequently stopped, and the running cost is increased.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the utility model provides a sludge drying treatment system.
The sludge drying treatment system comprises a sludge drying machine, wherein a wet sludge feed inlet, an air inlet, a dry sludge discharge outlet and a wet gas outlet are arranged on the sludge drying machine; the wet gas outlet is sequentially connected with a first heating device and a dust removing device.
In a further scheme, a second heating device is arranged at the air inlet; the first heating device is connected with the second heating device; and the heat medium of the first heating device is conveyed to the second heating device to heat air after being heated by the wet gas, and the heated hot air is conveyed into the sludge drier to be used as replacement gas of the wet gas.
In a further scheme, a third heating device is arranged at the ash bucket at the bottom of the dust removing device.
In a further scheme, a first access hole is formed in a communicating pipeline between the dust removing device and the first heating device.
In a further scheme, dust collected by the dust removing device is conveyed to the dry sludge outlet through a fly ash conveying screw and an inclined chute in sequence.
In a further scheme, a gas outlet of the dust removing device is sequentially connected with the condensing device, the harmful substance adsorption device and the alkaline washing tower. In a further scheme, a second overhaul port is arranged on a pipeline for connecting the dust removing device with the condensing device. In a further scheme, the alkaline washing tower is sequentially connected with an induced draft fan and a chimney.
Alternatively, the sludge dryer is a blade dryer.
In a further scheme, the wet sludge inlet is connected with at least one set of feeding device. Alternatively, the feeding device is a bucket lifting feeding device; or, the feeding device comprises a hopper, a stirrer is arranged in the hopper, a feeding screw is arranged at the outlet of the hopper, and the feeding screw is connected with the wet sludge inlet.
The exhaust steam heater is arranged in the system, the air inlet heater is arranged in other schemes, and the exhaust steam heater and the air heater are connected, so that the problem of flue blockage is solved, the use efficiency of steam energy is improved, and the operation cost is reduced.
In some schemes, the spiral ash conveying and chute arranged at the ash discharging port of the cyclone dust collector realize normal operation of the dust collector, fundamentally solve the problems of hardening, bonding and unsmooth ash discharging of the ash discharging port of the dust collector, and further improve the system integration level. Besides, in the further scheme, the stirrer arranged in the wet sludge bin realizes uniform feeding of sludge, avoids the phenomena of wet sludge stacking and bridging, and is beneficial to the stable operation of the blade drier.
Drawings
FIG. 1 is a block diagram of a sludge drying treatment system in an embodiment of the utility model;
FIG. 2 is a schematic top view of FIG. 1 according to the present utility model;
fig. 3 is a schematic view showing a wet sludge hopper in the embodiment of the present utility model.
Detailed Description
Unless specifically stated otherwise, scientific and technical terms herein have been understood based on the knowledge of one of ordinary skill in the relevant art.
The terms bottom, top, and the like, as used herein, refer to the direction or orientation of the drawing, and it is to be understood that the specific direction or orientation is merely an example of the utility model and that equivalents may be substituted for those illustrated in the drawings based on the disclosure herein.
Referring to fig. 1, the sludge drying treatment system of the utility model comprises a sludge dryer 5, wherein a wet sludge feed port 6, a dry sludge discharge port 11, a wet gas outlet 7 (also called a dead steam outlet) and an air inlet are arranged on the sludge dryer; the first heating device 18 and the dust removing device 8 are sequentially connected to the wet gas outlet.
In a specific scheme, the sludge drying system can be selected from the existing drying machines such as a fluidized bed drying machine, a disc drying machine, a blade drying machine or a belt drying machine; the system shown in the figure 1 is a blade dryer (comprising an inner cylinder and an outer cylinder, wherein a heat medium channel is formed between the inner cylinder and the outer cylinder, and the wet sludge inlet, the air inlet, the dry sludge outlet and the wet gas outlet are all communicated with the inner cylinder). The dust removing device can be a cloth bag dust remover or a cyclone dust remover; the system shown in fig. 1 is a cyclone. The first heating device can be a steam heater or an electric heater.
When the device works, wet sludge with the water content of 75-85% enters a desiccator through a wet sludge feed inlet, and the desiccation temperature in the desiccator is controlled at a proper temperature, such as 50-100 ℃; drying by a dryer to obtain dry sludge with the water content meeting the requirement (such as 10% -30%), and discharging the dry sludge from a dry sludge discharge port at the tail end of the dryer;
in the drying process, air enters the dryer from an air inlet to displace the wet steam generated in the dryer, so that the wet steam (also called exhaust steam) enters a first heating device from an exhaust steam outlet to be heated to about 100-120 ℃, and the adhesion of particles in the exhaust steam and the blockage of a flue are avoided; the heated gas enters a dust removing device to collect particles in the exhaust steam, and dust in the gas is discharged after being collected.
For wet sludge with different water contents, the specific temperature involved in each link in the process can be adjusted according to actual needs, and especially the water content of the wet sludge has direct influence on the system temperature.
According to practical application, in some schemes, a first access hole E1 is arranged on a flue connected with a dust removing device at a first heater outlet, and as shown in FIG. 1, an access hole is arranged at a bent pipe of the flue, so that online cleaning and maintenance are realized.
In a further preferred scheme, a heating device is arranged at a dust outlet or a dust hopper at the bottom of the dust removing device 8, so that the temperature of the dust hopper is maintained at a reasonable temperature, such as above 100 ℃, and the exhaust steam condensation is prevented from influencing the dust discharging and dust removing efficiency.
In some schemes, in order to improve the energy utilization efficiency and improve the temperature of the air entering the drier, a second heating device 10 is arranged at the air inlet, and the first heating device is connected with the second heating device; the hot medium (such as steam) of the first heating device is heated by the wet gas and then is conveyed to the second heating device to heat the air, and the heated hot air is conveyed into the sludge drier to be used as replacement gas of the wet gas.
In other schemes, the dust collected by the dust removing device is sequentially conveyed to the dry sludge outlet through a fly ash conveying screw and an inclined chute 9. The fly ash at the bottom of the dust removing device is conveyed to a spiral and an inclined chute, enters a dry sludge discharge port of the blade drier, and is discharged into a ton bag together with the dry sludge of the drier. On one hand, the phenomenon that ash is not smooth and blocked due to the fact that ash discharging holes at the bottom of a dust remover are in contact with wet flue gas and fly ash is adhered to the ash discharging holes is avoided, and the dust removing efficiency of the dust remover is further reduced; and the chute is connected with the dry mud discharge port of the blade dryer, and shares the same discharge port, so that ash is smoothly discharged in practical application, and the slurry is not blocked.
In a further scheme, a gas outlet of the dust removing device is sequentially connected with the condensing device 12, the harmful substance adsorbing device 14 and the alkaline washing tower 15. The exhaust steam after dust removal enters a condensing device to be condensed, then the condensed wastewater enters a wastewater tank 13 to be collected, and finally the wastewater is pumped into a sewage tank;
the exhaust steam after condensation enters a harmful substance adsorption device 14 such as an activated carbon adsorption box to remove heavy metals, deodorization, toxic and harmful gases and the like in the exhaust steam; then enters an alkaline washing tower 15 (alkali liquor in the alkaline washing tower is usually NaOH solution, sodium carbonate solution or sodium bicarbonate solution and the like) to remove acid gas in the exhaust steam, so that the tail gas is discharged after reaching the standard. In a further scheme, an outlet of the alkaline washing tower is sequentially connected with a draught fan 16 and a chimney 17, and exhaust steam is effectively discharged; the induced draft fan can provide negative pressure for the sludge drying system and power the exhaust steam flow, so that the problem that odor, dust and other tissues fly away due to positive pressure of the dryer is avoided. In a further preferred scheme, a water outlet is formed in the shell of the induced draft fan, water in the shell can be normally discharged out of the bottom of the chimney, and a water accumulation discharge port is formed in the shell.
In some schemes, an access hole E2 is formed in a connecting pipeline of the dust removing device and the condensing device, and as shown in fig. 1, an access hole is formed in a bent pipe of the connecting pipeline.
In other schemes, the device (such as a sludge drier, a first heating device or/and a second heating device) which adopts steam as a heat source in the collecting system works to generate steam condensate, and the collected condensate is used as an internal cleaning liquid of the condensing device 12, so that the recycling of the condensate is realized, and the use of water resources is saved.
In order to meet the requirements of different users, one or more feeding devices are arranged at the wet sludge feeding port of the drier. When a plurality of feeding devices are provided, the positions and the corresponding material-exhausting modes of the plurality of feeding devices can be different. Two feeding devices positioned in different directions are arranged at the wet sludge feeding port of the drier shown in fig. 1, one of the feeding devices is a bucket feeding device 4 which is arranged along the axial direction of the drier, and the bucket feeding device adopts a bucket lifting feeding mode and has a bag breaking function; the other wet sludge bin 1 is arranged at the side of the desiccator, the wet sludge bin 1 like the example 1 comprises a hopper 1-1 with a V-shaped structure, an outlet at the lower part of the hopper is connected with a wet sludge feeding screw 1-3, and a stirrer 1-2 is arranged in the hopper close to the bottom, so that the wet sludge can be uniformly discharged, and the phenomena of stacking and bridging are avoided; in practical application, a user can select a mud feeding mode according to the needs.
Claims (11)
1. The sludge drying treatment system is characterized by comprising a sludge drying machine, wherein a wet sludge feed inlet, an air inlet, a dry sludge discharge outlet and a wet gas outlet are arranged on the sludge drying machine;
the wet gas outlet is sequentially connected with a first heating device and a dust removing device.
2. The sludge drying treatment system of claim 1 wherein a second heating device is provided at the air inlet; the first heating device is connected with the second heating device; and the heat medium of the first heating device is conveyed to the second heating device to heat air after being heated by the wet gas, and the heated hot air is conveyed into the sludge drier to be used as replacement gas of the wet gas.
3. The sludge drying treatment system of claim 1 wherein a third heating means is provided at the bottom hopper of the dedusting device.
4. The sludge drying treatment system of claim 1, wherein a first access opening is provided in a communication line between the dust removing device and the first heating device.
5. The sludge drying treatment system of claim 1, wherein the dust collected by the dust removal device is conveyed to the dry sludge outlet through a fly ash conveying screw and an inclined chute in sequence.
6. The sludge drying treatment system of claim 1, wherein the gas outlet of the dust removal device is connected with the condensing device, the harmful substance adsorption device and the alkaline washing tower in sequence.
7. The sludge drying treatment system of claim 6 wherein the dedusting device is provided with a second access port on the connection line with the condensing device.
8. The sludge drying treatment system of claim 7, wherein the caustic scrubber is connected in sequence with an induced draft fan and a chimney.
9. The sludge drying treatment system of claim 1 wherein the sludge dryer is a paddle dryer.
10. The sludge drying treatment system of claim 1 wherein at least one set of feed means is connected to the wet sludge inlet.
11. The sludge drying treatment system of claim 10 wherein the feed means is a bucket lift feed means; or, the feeding device comprises a hopper, a stirrer is arranged in the hopper, a feeding screw is arranged at the outlet of the hopper, and the feeding screw is connected with the wet sludge inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320643265.8U CN219929898U (en) | 2023-03-28 | 2023-03-28 | Sludge drying treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320643265.8U CN219929898U (en) | 2023-03-28 | 2023-03-28 | Sludge drying treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219929898U true CN219929898U (en) | 2023-10-31 |
Family
ID=88503977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320643265.8U Active CN219929898U (en) | 2023-03-28 | 2023-03-28 | Sludge drying treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219929898U (en) |
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2023
- 2023-03-28 CN CN202320643265.8U patent/CN219929898U/en active Active
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