Sludge treatment production line

Abstract

The utility model discloses a sludge treatment production line, which relates to the technical field of sludge treatment and comprises a sludge treatment workshop, a fermentation workshop and a drying and packaging workshop. A sludge pool, a stirring pool, a size mixing tank, a filter press, a crusher, a waste gas treatment device and a wastewater treatment device are arranged in the sludge treatment workshop, the sludge pool, the stirring pool, the size mixing tank, the filter press and the crusher are sequentially connected, the stirring pool is connected with the waste gas treatment device, and the filter press and the sludge pool are respectively connected with the wastewater treatment device; the crusher is connected with the fermentation workshop, and the fermentation workshop is used for fermenting soil powder formed by the crusher; a drying machine and a packaging machine are arranged in the drying and packaging workshop, the drying machine is used for drying the fermented soil powder, and the packaging machine is used for packaging the dried soil powder. The sludge drying device can be used for drying sludge, so that the fuel value in the sludge can be conveniently utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge treatment production line. Background Art

[0002] With the accelerated pace of urbanization in China, the urban population has expanded rapidly, generating a significant amount of sludge. Sludge is a byproduct of the mud-water separation process at sewage treatment plants. Sludge treatment adheres to three principles: volume reduction, harmlessness, and resource utilization. Currently, the initial sludge treatment at domestic sewage treatment plants in my country uses a disc screw extruder or centrifuge to treat the raw slurry at a moisture content of 98%. The resulting sludge has a moisture content of approximately 80%. A plate and frame filter press is then used to create a sludge cake with a moisture content of 56-63%. The raw slurry is fluid, but solids after filtration. Landfilling is the primary method for disposing of the sludge cake, which contains a fuel value of 1400-1800 kcal, resulting in a waste of resources. Utility Model Content

[0003] The purpose of the utility model is to provide a sludge processing production line to solve the problems existing in the above-mentioned prior art, and to be able to dry the sludge and facilitate the utilization of the fuel value in the sludge.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a sludge treatment production line, comprising: a sludge treatment workshop, a fermentation workshop and a drying and packaging workshop; the sludge treatment workshop is provided with a mud pool, a stirring pool, a slurry mixing tank, a filter press, a crusher, an exhaust gas treatment device and a wastewater treatment device, the mud pool, the stirring pool, the slurry mixing tank, the filter press and the crusher are connected in sequence, the stirring pool is connected to the exhaust gas treatment device, the mud pool and the filter press are respectively connected to the wastewater treatment device, the mud pool is used for slurry mixing treatment of the sludge, the stirring pool is used for mixing the mud and chemical agents, the slurry mixing tank is used for material-saving treatment, the filter press is used for squeezing the mud in the slurry mixing tank into a mud cake, the crusher is used for crushing the mud cake formed by the filter press; the crusher is connected to the fermentation workshop, and the fermentation workshop is used for fermenting soil powder formed by the crusher; the drying and packaging workshop is provided with a dryer and a baler, the dryer is used for drying the fermented soil powder, and the baler is used for packaging the dried soil powder.

[0006] Preferably, the sludge treatment workshop includes a first workshop and a second workshop, the mud pool and the stirring pool are located in the first workshop, and the slurry mixing tank, the filter press, the crusher, the waste gas treatment device and the wastewater treatment device are all located in the second workshop.

[0007] Preferably, the sludge treatment workshop is also provided with a floor scale, a chemical bin and a metering scale. The floor scale is used to weigh the sludge, the chemical bin is used to hold chemical agents, the chemical bin is connected to the metering scale, the metering scale is connected to the stirring tank, and the metering scale is used to weigh the chemical agents.

[0008] Preferably, a cover is provided on the top of the mud pool, and the mud pool, the slurry mixing tank and the fermentation workshop are respectively connected to the waste gas treatment device.

[0009] Preferably, a trash rack is provided between the mud pool and the stirring pool, the bottom of the mud pool and the bottom of the stirring pool are integrally provided, and the bottom of the mud pool is higher than the bottom of the stirring pool.

[0010] Preferably, there are at least two slurry mixing tanks, a slurry pump is provided between the stirring tank and the slurry mixing tank, and a stirrer is provided in the slurry mixing tank.

[0011] Preferably, a sewage buffer tank is further provided in the sludge treatment workshop, and the sewage buffer tank is connected to the filter press and the wastewater treatment device respectively.

[0012] Preferably, the exhaust gas treatment device includes a spray tower and an activated carbon box, the spray tower is provided with a gas inlet, the gas outlet of the spray tower is connected to the gas inlet of the activated carbon box, and the gas outlet of the activated carbon box is connected to the atmosphere.

[0013] Preferably, it also includes a product workshop, which is used to store the packaged soil powder.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] The use of the utility model can achieve volume reduction treatment. From the time the sludge enters the mud pool to the time the soil powder is dried, the moisture content is reduced from about 80% to 2%, and the volume is reduced by 79.6%; it can achieve harmless treatment. The entire production line is produced in a closed environment. The exhaust gas is treated by the exhaust gas treatment device to meet the discharge standards. The wastewater is treated by the wastewater treatment device to reach industrial Class 2 water and is discharged into the pipeline network, and the other part is reused; it can achieve resource processing. The treated bagged soil powder contains organic matter and can be sold as aquaculture soil or greening soil. It also contains fuel value and can be sold to garbage incineration plants, power plants and cement plants according to the kilocalorie value. The treated soil powder does not need to be dehydrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a top view of the sludge treatment production line of the utility model;

[0018] Figure 2 This is the main view of the sludge treatment workshop of the utility model;

[0019] Figure 3 This is a sludge treatment flow chart of the utility model;

[0020] In the picture: 1: floor scale, 2: mud pool, 3: trash rack, 4: mixing tank, 5: measuring scale, 6: mud pump, 7: reagent warehouse, 8: first slurry mixing tank, 9: second slurry mixing tank, 10: sewage buffer tank, 11: second water pump, 12: first water pump, 13: air compressor, 14: vertical plunger pump, 15: filter press, 16: crusher, 17: exhaust gas treatment device, 18: wastewater treatment device, 19: slurry mixing water pump, 20: fermentation tank, 21: dryer, 22 baling machine, 23: product workshop. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The purpose of the utility model is to provide a sludge processing production line to solve the problems existing in the above-mentioned prior art, and to be able to dry the sludge and facilitate the utilization of the fuel value in the sludge.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] like Figures 1 to 2As shown, this embodiment provides a sludge treatment production line, including: a sludge treatment workshop, a fermentation workshop, a drying and packaging workshop and a product workshop 23, and the sludge treatment workshop, the fermentation workshop, the drying and packaging workshop and the product workshop 23 are all sealed; the sludge treatment workshop is provided with a floor scale 1, a mud pool 2, a stirring pool 4, a reagent warehouse 7, a measuring scale 5, a slurry mixing tank, a filter press 15, a sewage buffer tank 10, a crusher 16, an exhaust gas treatment device 17 and a wastewater treatment device 18, and the mud pool 2, the stirring pool 4, the slurry mixing tank, the filter press 15 and the crusher 16 are connected in sequence.

[0025] In this embodiment, the floor scale 1 is arranged at the head end of the sludge treatment workshop, and the floor scale 1 is used to weigh the sludge; the mud pool 2 is arranged behind the floor scale 1, and the mud pool 2 is used to perform slurry treatment on the sludge. The mud pool 2 is connected to the wastewater treatment device 18, and a slurry mixing water pump 19 is provided on the pipeline between the mud pool 2 and the wastewater treatment device 18. The water treated by the wastewater treatment device 18 is passed into the mud pool 2 for slurry treatment with the sludge. A lid is provided on the top of the mud pool 2 to prevent the odor from overflowing. When the sludge is poured into the mud pool 2, the lid is opened by an electric hoist. After the sludge is poured, the lid is closed by an electric hoist. The mud pool 2 is connected to the exhaust gas treatment device 17, and the odor in the mud pool 2 is passed into the exhaust gas treatment device 17; a trash rack 3 is provided between the mud pool 2 and the stirring tank 4. The trash rack 3 is located behind the mud pool 2, and the stirring tank 4 is located behind the trash rack 3. A groove is opened between the slurry tank 2 and the stirring tank 4, and the trash rack 3 is located in the groove. The trash rack 3 is used to keep down debris larger than 3 mm and then bag the debris. The bottom of the mud pool 2 and the bottom of the stirring tank 4 are integrally arranged. The bottom of the mud pool 2 is higher than the bottom of the stirring tank 4, which is convenient for the mud to flow into the stirring tank 4; the mud enters the stirring tank 4 through the trash rack 3, and the agent bin 7 is used to hold chemicals. The agent bin 7 is connected to the metering scale 5 through a spiral auger and is located behind the metering scale 5. The metering scale 5 is used to calculate the amount of chemicals. The metering scale 5 is connected to the stirring tank 4 through a spiral auger and is located behind the stirring tank 4. The metering scale 5 is used to weigh the chemicals. The amount of chemicals is determined according to the weight of the sludge dosed by the scale 1. The mud and chemicals are simultaneously introduced into the stirring tank 4 for stirring. The ammonia and methane generated in the stirring tank 4 are introduced into the exhaust gas treatment device 17.

[0026] In this embodiment, a submersible mixer is provided in the slurry mixing tank, which stores slurry mixed with chemicals. The slurry mixing tank is provided behind the chemical bin 7. There are preferably two slurry mixing tanks, namely a first slurry mixing tank 8 and a second slurry mixing tank 9. A slurry pump 6 is provided between the stirring tank 4 and the slurry mixing tank. The slurry mixing tank is used for material-saving processing until the mud and water are separated.

[0027] In this embodiment, the filter press 15 is preferably a plate and frame filter press, which is used to squeeze the mud in the slurry mixing tank into a mud cake. The sewage buffer tank 10 is located behind the slurry mixing tank and is used to store the sewage generated by the filter press 15. The sewage buffer tank 10 is respectively connected to the filter press 15 and the wastewater treatment device 18. A first water pump 12 is provided between the filter press 15 and the sewage buffer tank 10. The first water pump 12 is used to pump the sewage squeezed out by the filter press 15 into the sewage buffer tank 10. A second water pump 11 is provided between the sewage buffer tank 10 and the wastewater treatment device 18. The second water pump 11 is used to pump the sewage in the sewage buffer tank 10 into the wastewater treatment device 18.

[0028] In this embodiment, an air compressor 13 is provided behind the second water pump 11, and the air compressor 13 provides an air source for the valves of the entire control system; a vertical plunger pump 14 is arranged behind the air compressor 13, and a filter press 15 is provided behind the vertical plunger pump 14, and the vertical plunger pump 14 is used to extract the mud in the slurry mixing tank and pump it into the filter press 15.

[0029] In this embodiment, the crusher 16 is arranged behind the filter press 15. The mud cake formed by the filter press 15 is transported to the crusher 16 by a belt conveyor. The crusher 16 is used to crush the mud cake to form soil powder.

[0030] In this embodiment, the waste gas treatment device 17 and the waste water treatment device 18 are located at the rear end of the sludge treatment workshop. The waste gas treatment device 17 includes a spray tower and an activated carbon box. The number of spray towers and activated carbon boxes is set as needed. The activated carbon box is equipped with activated carbon. The spray tower is equipped with a gas inlet. The gas inlet of the spray tower is connected to the mud pool 2, the stirring pool 4, and the slurry mixing tank respectively. The gas outlet of the spray tower is connected to the gas inlet of the activated carbon box. The gas outlet of the activated carbon box is connected to the atmosphere. Ammonia gas becomes ammonia water, and methane is absorbed by the activated carbon. After treatment by the waste gas treatment device 17, the gas meets the emission standards. After treatment by the waste water treatment device 18, the COD content in the waste water is reduced, and it can be discharged in compliance with the standards and enter the pipeline network. Part of it enters the mud pool 2 and is reused as slurry mixing water.

[0031] In this embodiment, the sludge treatment workshop includes a first workshop and a second workshop. The weighing scale 1, mud pool 2, trash rack 3, mixing pool 4 and measuring scale 5 are located in the first workshop, and the slurry mixing tank, filter press 15, crusher 16, exhaust gas treatment device 17 and wastewater treatment device 18 are all located in the second workshop. Dividing the sludge treatment workshop into the first workshop and the second workshop can isolate the odor generated when the mud truck unloads the sludge. These odors enter the exhaust gas treatment device 17 through the pipe of the mud pool 2.

[0032] In this embodiment, the crusher 16 is connected to the fermentation workshop, and the fermentation workshop is arranged separately on one side of the factory area. The fermentation workshop is connected to the exhaust gas treatment device 17, which can treat the lees odor generated during fermentation. A fermentation tank 20 is set in the fermentation workshop. The fermentation tank 20 is used to ferment the soil powder formed by the crusher 16. The soil powder and fermentation bacteria are placed in the fermentation tank 20 and stacked for 7 days to complete the fermentation.

[0033] In this embodiment, a dryer 21 and a baler 22 are provided in the drying and baling workshop. The dryer 21 is used to dry the fermented soil powder until it is absolutely dry. The baler 22 is arranged behind the dryer 21. The dried soil powder is transported to the baler 22 by a belt conveyor and loaded into small woven bags to realize the packaging of the soil powder.

[0034] In this embodiment, the product workshop 23 is used to store and stack woven bags filled with soil powder.

[0035] The use of the utility model can achieve volume reduction treatment. From the time the sludge enters the mud pool 2 to the time the soil powder is dried, the moisture content is reduced from about 80% to 2%, and the amount is reduced by 79.6%; it can achieve harmless treatment. The entire production line is produced in a closed environment. The exhaust gas is treated by the exhaust gas treatment device 17 to meet the discharge standards, and the wastewater is treated by the wastewater treatment device 18 to reach industrial Class 2 water and be discharged into the pipeline network, and the other part is reused; it can achieve resource processing. The treated bagged soil powder contains organic matter and can be sold as aquaculture soil or greening soil. It also contains fuel value and can be sold to garbage incineration plants, power plants and cement plants according to the kilocalorie value. The treated soil powder does not need to be dehydrated, and no odor is generated when the soil powder is burned.

[0036] The present embodiment is economical for treating sludge, with low production costs. From the time the sludge enters the tank to the finished product, the costs of chemicals, human machinery, and electricity will not exceed RMB 130 per ton, and there is also a portion of income from the sale of the finished product. The equipment investment is small, and the equipment investment for the entire production line is only one-tenth of that of other products of the same specifications. The sludge is transformed from waste into a resource through treatment and sold, creating benefits for society.

[0037] like Figure 3 As shown, this embodiment provides a sludge treatment method using a sludge treatment production line, comprising the following steps:

[0038] Step 1: slurry preparation: add mud with a water content of 80% and water into the mud pool 2 and stir to form slurry;

[0039] Step 2, chemical reaction treatment: The slurry is added to the stirring tank 4, and chemical agents are added to the stirring tank 4 in proportion and stirred evenly. The chemical agents (inorganic substances) react with the slurry to produce a large amount of ammonia and a small amount of methane and sulfide gases. The colloid of the mud is destroyed, the pathogens are killed, and the odor of the mud is reacted. The waste gas generated is passed into the waste gas treatment device 17 and discharged into the atmosphere after treatment;

[0040] Step 3: Material saving treatment: add the chemically reacted slurry into the slurry mixing tank to save material. Multiple slurry mixing tanks can be used in turn.

[0041] Step 4: Filter press treatment: After the slurry has been fully reacted, the mud and water have been completely separated. The mud in the slurry mixing tank is injected into the filter press 15, and is pressed to form a mud cake with a water content reduced to 40%. The generated wastewater is treated in the wastewater treatment device 18 and the treated wastewater is passed into the mud pool 2 and / or the pipe network;

[0042] Step 5: Crushing: The mud cake formed by the filter press 15 is placed in the crusher 16 for crushing to form soil powder with particles less than 3 mm;

[0043] Step 6, fermentation treatment: The soil powder formed by the crusher 16 is placed in a fermentation workshop for fermentation for 7 days. The fermentation process generates a high temperature of about 70 degrees Celsius and is accompanied by the smell of fermented lees. The lees smell is treated by the exhaust gas treatment device 17, at which time the moisture content is further reduced from 40% to about 20%;

[0044] Step seven, drying treatment: the fermented soil powder is sent to the drying and packaging workshop, and is dried by the dryer 21. The moisture content of the dried soil powder is finally reduced to 2%, which is almost completely dry; the dried soil powder enters the packaging machine 22 and is packed into small woven bags (25kg).

[0045] Application Examples

[0046] Location: Zhaoqing, Guangdong Province.

[0047] Company name: Guangdong Huayang Solid Waste Treatment Center.

[0048] Processing capacity: 50 tons of domestic sewage sludge with a moisture content of about 80% per day.

[0049] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A sludge treatment production line, characterized by: include: Sludge treatment workshop, fermentation workshop and drying and packaging workshop; The sludge treatment workshop is provided with a mud pool, a stirring pool, a slurry mixing tank, a filter press, a crusher, an exhaust gas treatment device and a wastewater treatment device. The mud pool, the stirring pool, the slurry mixing tank, the filter press and the crusher are connected in sequence, the stirring pool is connected to the exhaust gas treatment device, the mud pool and the filter press are respectively connected to the wastewater treatment device, the mud pool is used for slurry mixing treatment of the sludge, the stirring pool is used for mixing the mud and chemical agents, the slurry mixing tank is used for material-saving treatment, the filter press is used for squeezing the mud in the slurry mixing tank into a mud cake, and the crusher is used for crushing the mud cake formed by the filter press; the crusher is connected to the fermentation workshop, and the fermentation workshop is used to ferment the soil powder formed by the crusher; the drying and packaging workshop is provided with a dryer and a baler, the dryer is used to dry the fermented soil powder, and the baler is used to package the dried soil powder.

2. The sludge treatment production line according to claim 1, characterized in that: The sludge treatment workshop includes a first workshop and a second workshop, the mud pool and the stirring pool are located in the first workshop, and the slurry mixing tank, the filter press, the crusher, the waste gas treatment device and the wastewater treatment device are all located in the second workshop.

3. The sludge treatment production line according to claim 1, characterized in that: The sludge treatment workshop is also provided with a floor scale, a chemical bin and a metering scale. The floor scale is used to weigh the sludge, the chemical bin is used to hold chemical agents, the chemical bin is connected to the metering scale, the metering scale is connected to the stirring tank, and the metering scale is used to weigh the chemical agents.

4. The sludge treatment production line according to claim 1, characterized in that: A cover is provided on the top of the mud pool, and the mud pool, the slurry mixing tank and the fermentation workshop are respectively connected to the waste gas treatment device.

5. The sludge treatment production line according to claim 1, characterized in that: A trash rack is provided between the mud pool and the stirring pool. The bottom of the mud pool and the bottom of the stirring pool are integrally provided. The bottom of the mud pool is higher than the bottom of the stirring pool.

6. The sludge treatment production line according to claim 1, characterized in that: There are at least two slurry mixing tanks, a slurry pump is provided between the stirring pool and the slurry mixing tank, and a stirrer is provided in the slurry mixing tank.

7. The sludge treatment production line according to claim 1, characterized in that: A sewage buffer tank is also provided in the sludge treatment workshop, and the sewage buffer tank is connected to the filter press and the wastewater treatment device respectively.

8. The sludge treatment production line according to claim 1, characterized in that: The waste gas treatment device includes a spray tower and an activated carbon box. The spray tower is provided with a gas inlet. The gas outlet of the spray tower is connected to the gas inlet of the activated carbon box. The gas outlet of the activated carbon box is connected to the atmosphere.

9. The sludge treatment production line according to claim 1, characterized in that: It also includes a product workshop, which is used to store the packaged soil powder.

Images