CN209853963U - Sludge drying aerobic fermentation system - Google Patents
Sludge drying aerobic fermentation system Download PDFInfo
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- CN209853963U CN209853963U CN201920040678.0U CN201920040678U CN209853963U CN 209853963 U CN209853963 U CN 209853963U CN 201920040678 U CN201920040678 U CN 201920040678U CN 209853963 U CN209853963 U CN 209853963U
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Abstract
The utility model discloses a sludge drying aerobic fermentation system. Comprises a sludge forming machine, a low-temperature heat pump drier and an aerobic composting bin which operate in a closed way; the sludge forming machine and the low-temperature heat pump drying machine are arranged on a supporting platform, an aerobic composting bin is arranged below the supporting platform, and a film rolling machine capable of rolling and expanding a polytetrafluoroethylene film and an aeration pipeline with a grid structure paved on the ground are arranged in the aerobic composting bin. The system can crush and mold municipal sludge with the water content of about 80 percent, then dry the sludge to the water content of about 60 percent, then mix the sludge with about 15 percent of additional auxiliary materials and about 0.1 percent of high-temperature strains to form a sludge stack, cover a special material film above the stack, and carry out aerobic composting under the action of forced ventilation; the whole set of equipment achieves the purpose of reducing the additive amount of the auxiliary materials through drying and reducing, reduces odor escape in the composting process through film covering, and simultaneously keeps the temperature of a compost body and the oxygen concentration of the uniform compost body, so that the composting period is shortened, and sludge reduction and recycling are achieved quickly and efficiently.
Description
Technical Field
The utility model relates to a sewage treatment plant mud utilization technical field belongs to a sludge drying processing system equipment, particularly, relates to a system equipment that mud low temperature heat pump mummification machine and membrane cover good oxygen composting device ally oneself with and use.
Background
Along with the large-scale construction and operation of sewage treatment plants in China, the sludge yield is greatly increased, and the sludge treatment problem is more prominent. The sludge is difficult to be recycled due to high water content, high viscosity, bacteria, pathogens and the like, and is subjected to proper drying treatment and then used for subsequent treatment such as composting or incineration, so that the sludge reduction can be realized, the investment and operation cost of the sludge composting technology is low, and the composted sludge can be used as landscaping fertilizer or even agricultural fertilizer, so that the recycling of the sludge is realized.
The existing sewage treatment plant mainly adopts a sludge heat drying technology which is mainly divided into high-temperature drying, medium-temperature drying and low-temperature drying, and the drying potential is exerted by reducing the air humidity. Wherein the low-temperature drying temperature is below 100 ℃, the volatilization of malodorous gas can be effectively avoided, the release of benzene series is reduced to the maximum extent, and the low-temperature drying device has good energy-saving and environmental-friendly benefits.
The integrated composting equipment in the existing composting technology has high investment cost or the operation effect can not meet the requirement. The traditional trough type composting has low investment cost and wider application, but the odor pollution generated in the trough type composting process, the composting period is long, and the large occupied area restricts the popularization of the composting technology.
How to realize the reduction and the resource of the sludge, and reduce the sludge disposal cost and the secondary pollution to the environment is a technical difficulty to be solved.
Disclosure of Invention
According to the not enough of prior art existence, the utility model provides a system that mud low temperature heat pump mummification machine and membrane cover good oxygen composting device ally oneself with usefulness can realize carrying out the mud mummification minimizing under the low temperature condition high-efficiently, and then reduces investment, the running cost of later stage compost to whole resourceful process does not cause secondary pollution to the environment.
In order to achieve the technical purpose, the utility model discloses a following technical scheme realizes:
the utility model provides a sludge drying aerobic fermentation system, includes sludge forming machine and the low temperature heat pump mummification machine of enclosed operation, its characterized in that: also comprises an aerobic composting bin which runs in a closed way;
the sludge forming machine and the low-temperature heat pump drier are arranged on the supporting platform, an aerobic composting bin is arranged below the supporting platform, and dried sludge discharge ports of the sludge forming machine and the low-temperature heat pump drier are positioned on the top surface of the aerobic composting bin;
and a film rolling machine capable of rolling the expanded polytetrafluoroethylene film and an aeration pipeline with a grid structure paved on the ground are arranged in the aerobic composting bin.
The support platform is provided with an auxiliary material bin, an outlet at the bottom of the auxiliary material bin is provided with a mixing screw conveyor which runs in a closed mode, and the outlet end of the mixing screw conveyor is located at a dried sludge discharge port.
And the film rolling machine is positioned at the upper part of the aerobic composting bin and is of a scroll structure used for rolling along the transverse direction or the longitudinal direction of the aerobic composting bin to cover and roll the expanded polytetrafluoroethylene film on the sludge composting body.
The aeration pipeline is composed of aeration main pipes and aeration branch pipes which are arranged and communicated at intervals, and aeration holes are uniformly arranged at intervals on the aeration branch pipes.
And further, the aeration holes are arranged on the lower half parts of the aeration branch pipes, two rows of aeration holes with downward openings are arranged on each aeration branch pipe at equal intervals, and the radial included angle of the two rows of aeration holes is 90 degrees.
Further the aerobic composting bin is provided with a temperature detector and an oxygen content detector.
And furthermore, at least two groups of mesh belt conveyors which are combined up and down and run in an end-to-end mode are arranged below an inlet and an outlet of the sludge forming machine which are connected with the sludge bin, and the outlet of the lower mesh belt conveyor is positioned at a dried sludge discharge hole.
And further, at least two groups of vertically combined mesh belt conveyors which run in an end-to-end connection mode run in the closed low-temperature heat pump drying machine, and a hot air fan of the low-temperature heat pump drying machine is arranged at the bottom of the low-temperature heat pump drying machine.
The top surface of the aerobic composting bin is provided with an exhaust port, and the exhaust port is communicated with the air purification device through a negative pressure pipeline.
The utility model has the advantages that:
low operation cost: the drying stage of the equipment adopts a low-temperature closed drying machine taking a heat pump technology as a core, the energy is saved compared with the traditional technology of directly drying sludge by a heat source, the drying is carried out until 60 percent of sludge is reduced by half, the consumption of auxiliary materials in the later composting process is reduced, the area of a composting site is saved, the composting efficiency is improved by a film-covered composting technology, the composting period is shortened, the power consumption generated by aeration is further saved, and the operation cost of the whole equipment is reduced.
High safety performance: the temperature of the drying process is controlled to be 40-55 ℃, and the drying process is carried out in a fully-closed box body, so that the explosion danger is avoided, and the escape of harmful gas is avoided. The water separated from the sludge under the low temperature condition is relatively clean water, complex treatment is not needed, and secondary pollution to a water body is avoided. The composting process also adopts a film covering technology which can prevent odor from escaping, and the secondary pollution to the environment is not caused in the sludge reduction and recycling processes.
The drying machine is of a modular assembly structure, is convenient to install and maintain, small in occupied area, simple in composting structure, capable of adopting a civil structure and low in investment cost.
Except that the compost sludge, the auxiliary materials and the microbial inoculum are mixed by the forklift, the whole equipment is automatically controlled by the PLC, and the automation degree of the equipment is high.
The nutrient content of the sludge after the compost is decomposed is more than 3 percent, and the compost is free of toxic and harmful substances, can be used as a fertilizer for landscaping, and even can be directly used as an agricultural fertilizer, so that the reduction, harmlessness and recycling of the sludge are realized.
Drawings
Fig. 1 is a schematic front view of the device of the present invention;
fig. 2 is a schematic side view of the present invention;
FIG. 3 is a view showing the arrangement of the aeration conduit;
FIG. 4 is a schematic cross-sectional view of an aeration manifold, showing the distribution and opening pattern of aeration holes;
FIG. 5 is a schematic view of an aeration manifold in which the dot-shaped holes are aeration holes.
In the figure: 1 is a sludge storage bin, 2 is a sludge forming machine, 3 is a low-temperature heat pump drier, 4 is an auxiliary storage bin, 5 is a supporting platform, 6 is an aerobic composting bin, 7 is an equipment room, 31 is a mesh belt conveyor, 32 is a heat pump system, 33 is a fan, 34 is a mixing screw conveyor, 35 is a dried sludge discharge port, 61 is an automatic rolling door, 62 is a stack body, 63 is an expanded polytetrafluoroethylene membrane, 64 is a temperature detector, 65 is an oxygen content detector, 66 is a film rolling machine, 67 is an exhaust port, 68 is an aeration pipeline, 68a is a main pipe, 68b is a branch pipe, 68c is an aeration hole, 69 is a pipeline ditch, 71 is a door, 72 is an exhaust fan, 73 is an electrical appliance control cabinet, and 74 is an air blower.
Detailed Description
The present invention will be further described with reference to the following embodiments, which are intended to illustrate the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the scope of the present invention.
With reference to the attached drawings.
As shown in fig. 1 and 2, a sludge drying system comprises a sludge storage bin 1, a sludge forming machine 2, a low-temperature heat pump drying machine 3, an auxiliary material bin 4, a supporting platform 5, an aerobic composting bin 6 and an equipment room 7, wherein the supporting platform 5 is located above the aerobic composting bin 6 and the equipment room 7, the sludge storage bin 1, the sludge forming machine 2 and the low-temperature heat pump drying machine 3 above the supporting platform are arranged in series from top to bottom, the auxiliary material bin 4 is located outside the low-temperature drying machine 3, and the aerobic composting bin 6 and the equipment room 7 below the auxiliary material bin are arranged in parallel; the low-temperature heat pump drying machine 3 is mainly internally provided with a mesh belt conveyor 31, a heat pump system 32 and a fan 33, the mixing screw conveyor 34 and the aerobic composting bin 6 are mainly provided with a film rolling machine 66, an expanded polytetrafluoroethylene film 63, an aeration pipeline 68, an exhaust port 67, a temperature detector 64 and an oxygen content detector 65, and the equipment room 7 is mainly provided with a door 71, an exhaust fan 72, an electric appliance control cabinet 73 and a blower 74.
Blocky sludge with the water content of about 80 percent after dehydration in a sewage treatment plant enters a sludge forming machine 2 from a material bin 1, the blocky sludge is crushed and formed in the sludge forming machine 2 to form strips with the thickness of about 5mm, the strip-shaped sludge directly falls into a low-temperature heat pump dryer 3 to form a sludge layer with good air permeability, a heat pump system 32 of the low-temperature heat pump dryer 3 dehumidifies and heats air to form hot dry air, the hot dry air is driven by a fan 33 and continuously passes through the sludge layer on a mesh belt conveyor 31 from bottom to top, and the sludge is dehydrated and dried to the water content of about 60 percent. The volume and the weight of the dewatered sludge are reduced by half, so that the amount of the auxiliary materials added in the later composting process is reduced by half, the area of a composting site is reduced, and the composting cost is reduced.
The dried sludge falls onto the mixing screw conveyor 34 under the conveying action of the mesh belt conveyor 31, one part of the mixing screw conveyor 34 is positioned inside the drying machine, the other part of the mixing screw conveyor is positioned outside the drying machine, the part positioned outside the drying machine is connected with the auxiliary material bin 4, the auxiliary material and the strains are mixed according to a certain proportion, and then the mixture enters the auxiliary material bin through the external conveyor at a speed which is 15% of the discharging speed of the dried sludge, and the adding amount of the dried sludge and the auxiliary material is 1: 0.15. Because the same mixing material conveying screw machine 34 is adopted, the auxiliary materials can be preliminarily mixed with the dried sludge in the conveying process through the spiral stirring effect after entering the drying machine, and the preliminarily mixed sludge falls into the aerobic composting chamber 6 from the dried sludge discharge port 35.
Because the dried sludge discharge port 35 is positioned above the middle of the aerobic composting bin 6 and is close to the automatic rolling door 61 side of the aerobic composting bin 6, the falling dried sludge and auxiliary materials form a conical compost body in the middle of the aerobic composting bin 6, when the outer edge of the conical compost body reaches the automatic rolling door 61, the mixing screw conveyor 34 stops conveying the materials, meanwhile, a forklift enters the aerobic composting bin 6 from the automatic rolling door 61 side to mix the compost body again, and piles the mixed materials to the other side of the composting chamber, the forklift exits the aerobic composting bin 6 after the materials are piled, and the mixing screw conveyor 34 continues to operate until the aerobic composting bin 6 is full.
After the aerobic composting bin 6 is fully piled, the external conveyor stops feeding the sludge and the auxiliary materials, the sludge forming machine 2 and the low-temperature heat pump drying machine 3 stop running, the film rolling machine 66 runs, the expanded polytetrafluoroethylene film 63 covers the pile body 62 through manual assistance, and two holes are reserved on the expanded polytetrafluoroethylene film 63 in the middle of the pile body 62 and used for inserting the temperature detector 64 and the oxygen content detector 65. When the expanded polytetrafluoroethylene membrane 63 is covered and the temperature detector 64 and the oxygen content detector 65 are inserted into the corresponding positions, the operator exits the aerobic composting bin 6, closes the automatic rolling door 61, and starts the blower 74 to compost.
The air quantity and the aeration frequency of the blower 74 are automatically adjusted through the data of the temperature detector 64 and the oxygen content detector 65 in the composting process, so that the temperature of the compost 62 is basically maintained at 50-70 ℃, and the oxygen content is maintained at 5-15%.
The arrangement mode of the aeration pipelines 68 is in a Chinese character feng shape, so that uniform aeration at each corner of the pile is ensured, the aeration holes 68c on the aeration branch pipes 68b are two rows of downward 45-degree holes which are staggered, and the peripheries of the aeration holes 68c are protected by paving auxiliary materials, so that fine dust particles and the like in the pile can be prevented from blocking the aeration holes 68 c.
The expanded PTFE membrane 63 serves to help maintain the temperature of O in the stack 622Uniform concentration and temperature distribution while preventingThe odor substances generated in the composting process escape. Under the auxiliary action of the expanded polytetrafluoroethylene membrane 63, the composting period can be shortened to 8-10 d, and the composting process does not need to be turned over, so that the composting process is simplified.
When the temperature of the compost body 62 naturally drops below 40 ℃, composting is finished, a small amount of odor generated due to untight film covering and the like in the aerobic composting bin 6 is replaced through an exhaust port 67 above the aerobic composting bin 6, then the automatic rolling door 61 is opened, the expanded polytetrafluoroethylene film 63 is rolled up through the film rolling machine 66 and the assistance of operators, and then a forklift transports the compost product out of the aerobic composting bin 6.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a sludge drying aerobic fermentation system, includes sludge forming machine and the low temperature heat pump mummification machine of enclosed operation, its characterized in that: also comprises an aerobic composting bin which runs in a closed way;
the sludge forming machine and the low-temperature heat pump drier are arranged on the supporting platform, an aerobic composting bin is arranged below the supporting platform, and dried sludge discharge ports of the sludge forming machine and the low-temperature heat pump drier are positioned on the top surface of the aerobic composting bin;
and a film rolling machine capable of rolling the expanded polytetrafluoroethylene film and an aeration pipeline with a grid structure paved on the ground are arranged in the aerobic composting bin.
2. The sludge drying aerobic fermentation system according to claim 1, which is characterized in that: the support platform is provided with an auxiliary material bin, an outlet at the bottom of the auxiliary material bin is provided with a mixing screw conveyor which runs in a closed mode, and the outlet end of the mixing screw conveyor is located at a dried sludge discharge port.
3. The sludge drying aerobic fermentation system according to claim 2, characterized in that: the film rolling machine is positioned at the upper part of the aerobic composting bin and is of a scroll structure used for rolling along the transverse direction or the longitudinal direction of the aerobic composting bin to cover and roll the expanded polytetrafluoroethylene film on the sludge composting body.
4. The sludge drying aerobic fermentation system according to claim 2, characterized in that: the aeration pipeline is composed of an aeration main pipe and aeration branch pipes which are arranged and communicated at intervals, and aeration holes which are uniformly arranged at intervals are arranged on the aeration branch pipes.
5. The sludge drying aerobic fermentation system according to claim 4, characterized in that: the aeration holes are arranged on the lower half parts of the aeration branch pipes, two rows of aeration holes with downward openings are arranged on each aeration branch pipe at equal intervals, and the radial included angles of the two rows of aeration holes form 90 degrees.
6. The sludge drying aerobic fermentation system according to claim 2, characterized in that: the aerobic composting bin is provided with a temperature detector and an oxygen content detector.
7. The sludge drying aerobic fermentation system according to claim 2, characterized in that: the inlet of the sludge forming machine is connected with the sludge bin, at least two groups of mesh belt conveyors which are combined up and down and run in an end-to-end mode are arranged below the outlet, and the outlet of the lower mesh belt conveyor is positioned at the dried sludge discharge port.
8. The sludge drying aerobic fermentation system of claim 7, wherein: the at least two groups of vertically combined and end-to-end connected mesh belt conveyors operate in a closed low-temperature heat pump drying machine, and a hot air fan of the low-temperature heat pump drying machine is arranged at the bottom of the low-temperature heat pump drying machine.
9. The sludge drying aerobic fermentation system according to any one of the claims 1 to 8, characterized in that: and the top surface of the aerobic composting bin is provided with an exhaust port, and the exhaust port is communicated with the air purification device through a negative pressure pipeline for discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040678.0U CN209853963U (en) | 2019-01-10 | 2019-01-10 | Sludge drying aerobic fermentation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040678.0U CN209853963U (en) | 2019-01-10 | 2019-01-10 | Sludge drying aerobic fermentation system |
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| CN209853963U true CN209853963U (en) | 2019-12-27 |
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| CN201920040678.0U Active CN209853963U (en) | 2019-01-10 | 2019-01-10 | Sludge drying aerobic fermentation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578633A (en) * | 2020-05-22 | 2020-08-25 | 广西佳尔通环境科技有限公司 | Method for drying by electromagnetic induction heating airflow of cover film |
| CN115780470A (en) * | 2022-11-16 | 2023-03-14 | 瑞邦环境治理(广东)有限公司 | Method for homogenizing and recycling stock garbage ex-situ treatment material |
-
2019
- 2019-01-10 CN CN201920040678.0U patent/CN209853963U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578633A (en) * | 2020-05-22 | 2020-08-25 | 广西佳尔通环境科技有限公司 | Method for drying by electromagnetic induction heating airflow of cover film |
| CN111578633B (en) * | 2020-05-22 | 2023-11-28 | 广西佳尔通环境科技有限公司 | Airflow drying method by using cover film electromagnetic induction heating |
| CN115780470A (en) * | 2022-11-16 | 2023-03-14 | 瑞邦环境治理(广东)有限公司 | Method for homogenizing and recycling stock garbage ex-situ treatment material |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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Address after: Group 1, Puhe community, Taixing Town, East Industrial Zone, Xindu District, Chengdu City, Sichuan Province Co-patentee after: Guotou xinkaishui Environmental Investment Co.,Ltd. Patentee after: SICHUAN TIANRUNDE ENVIRONMENT ENGINEERING Co.,Ltd. Address before: 610500 Sichuan province Chengdu Xindu Industrial District East District Taixing town Pu River community one club Co-patentee before: XINKAI WATER ENVIRONMENT INVESTMENT Co.,Ltd. Patentee before: SICHUAN TIANRUNDE ENVIRONMENT ENGINEERING Co.,Ltd. |
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| CP03 | Change of name, title or address |