Coupling system for preparing soil conditioner through sludge harmless treatment and resource utilization

Abstract

The utility model provides a coupling system for preparing a soil conditioner through harmless treatment and resource utilization of sludge. The coupling system is characterized in that an inlet and an outlet of an aerobic fermentation tank are respectively connected with a first conveyor and a second conveyor, and the top of the aerobic fermentation tank is connected with a heavy metal ion passivator feeder, a harmful organic matter decomposer feeder, a pH value regulator feeder and a fermentation inoculant feeder; an inlet and an outlet of the first crusher are respectively connected with a second conveyor and a third conveyor; an inlet and an outlet of the stirring mixer are respectively connected with a third conveyor and a fourth conveyor; an inlet and an outlet of the granulator are respectively connected with a fourth conveyor and a fifth conveyor, and the top of the granulator is connected with an adhesive spraying device; an inlet and an outlet of the dryer are respectively connected with a fifth conveyor and a sixth conveyor; an inlet of the cooling machine is connected with a sixth conveyor, an outlet of the cooling machine is connected with the screening machine through a seventh conveyor, and the product is the soil conditioner. According to the utility model, harmless treatment and resource comprehensive utilization of the sludge are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of environmentally friendly agriculture, and in particular to a coupling system for harmless treatment of sludge and resource utilization to prepare a soil conditioner. Background Art

[0002] There are many types of sludge, including urban and rural domestic sludge, coal washing sludge, food processing sludge, chemical industry sludge, light industry sludge, agricultural and sideline products processing sludge, river (wetland) sludge, etc. The composition of sludge is very complex, containing different components and different contents of organic matter, plant nutrients (nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, copper, zinc, manganese, molybdenum, boron), plant beneficial elements (silicon, titanium, selenium, nickel, vanadium), or harmful heavy metal elements (lead, cadmium, chromium, arsenic, mercury) and harmful organic compounds.

[0003] The harmless treatment and comprehensive resource utilization of sludge can not only eliminate the harm caused by sludge to the ecological environment, but also turn waste into treasure, which is a move that benefits the country and the people. Therefore, it is of great significance to carry out harmless treatment of sludge, promote resource utilization, recycle the energy and resources in sludge, and achieve synergistic efficiency of pollution reduction and carbon reduction.

[0004] At present, the commonly used method for sludge resource utilization is: the sludge produced by the sewage treatment plant is treated by anaerobic digestion or aerobic fermentation and then used as fertilizer or soil conditioner. Although this sludge treatment method realizes the resource utilization of sludge, anaerobic digestion or aerobic fermentation cannot completely passivate and inactivate the heavy metal ions in the sludge, the harmful organic matter cannot be completely decomposed, the harmful bacteria cannot be completely killed, and the pH value of the sludge cannot be adjusted. Therefore, although the prepared fertilizer or soil conditioner contains organic matter and plant nutrients and beneficial elements that can improve the soil and enhance the soil fertility of the sludge, it also contains harmful heavy metal elements (lead, cadmium, chromium, arsenic, mercury), harmful organic compounds and harmful bacteria, etc., which are contained in the sludge. Therefore, applying the prepared fertilizer or soil conditioner to the soil will still cause secondary pollution and damage the ecological environment. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects in the prior art and provide a coupling system for harmless treatment of sludge and resource utilization to prepare a soil conditioner. The coupling system eliminates the pollution of sludge to the ecological environment through harmless treatment of sludge, can turn waste into treasure, and realize comprehensive utilization of resources.

[0006] The utility model provides a coupled system for harmless treatment of sludge and resource utilization to prepare soil conditioner, comprising: a heavy metal ion passivator feeder connected to an aerobic fermentation tank, a harmful organic matter decomposer feeder, a pH value regulator feeder and a fermentation agent feeder.

[0007] Preferably, a turning mixer is provided inside the aerobic fermentation tank; the gas input end of the aerobic fermentation tank is connected to the blower, the inlet of the aerobic fermentation tank is connected to the first conveyor for conveying sludge, and the outlet of the aerobic fermentation tank is connected to the second conveyor; the second conveyor is connected to the inlet of the first pulverizer, and the outlet of the first pulverizer is connected to the third conveyor; the third conveyor is connected to the inlet of the stirring mixer, and the outlet of the stirring mixer is connected to the fourth conveyor; the fourth conveyor is connected to the inlet of the granulator, and the outlet of the granulator is connected to the fifth conveyor; the top of the granulator is connected to the adhesive spraying device.

[0008] Preferably, a plurality of nutrient element feeders are connected to the top of the stirring mixer.

[0009] Preferably, there are three nutrient element feeders, including a macronutrient element feeder, a medium nutrient element feeder and a trace nutrient element feeder.

[0010] Preferably, the heavy metal ion passivator feeder, the harmful organic matter decomposer feeder, the pH regulator feeder, the fermentation agent feeder, the macronutrient feeder, the medium nutrient feeder and the trace nutrient feeder all include a metering device, and the metering devices are all connected to the controller for regulating the feeding amount of the heavy metal ion passivator feeder, the harmful organic matter decomposer feeder, the pH regulator feeder, the fermentation agent feeder, the macronutrient feeder, the medium nutrient feeder and the trace nutrient feeder through the controller.

[0011] Preferably, the fifth conveyor is connected to the inlet of the dryer, the outlet of the dryer is connected to the inlet of the cooler through the sixth conveyor, the outlet of the cooler is connected to the inlet of the screening machine through the seventh conveyor, the first outlet of the screening machine is connected to the packaging machine through the eighth conveyor, the packaging machine is connected to the loader through the ninth conveyor, and the packaged products loaded by the loader are transported to the finished product warehouse for storage.

[0012] Preferably, the second outlet of the screening machine is connected to the granulator through a tenth conveyor.

[0013] Preferably, the third outlet of the screening machine is communicated with the inlet of the second pulverizer through an eleventh conveyor, and the outlet of the second pulverizer is communicated with the granulator through a twelfth conveyor.

[0014] Preferably, the aerobic fermentation tank is connected to the tail gas absorption and dust removal system through a first conveying pipe; the first pulverizer is connected to the dust removal system through a second conveying pipe; and the top of the dryer is connected to the gas collection and dust removal system through a third conveying pipe.

[0015] Preferably, the sludge conveyed by the first conveyor is transported from a sludge source to a sludge storage yard by a sludge transport vehicle, and the sludge in the sludge storage yard is transported to an aerobic fermentation tank by the first conveyor.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model adds an appropriate amount of heavy metal ion passivator, harmful organic matter decomposer, pH value regulator, and fermentation agent to the sludge sent into the aerobic fermentation tank, and then passesivates and fixes the heavy metals in the sludge, decomposes the harmful organic matter, kills the harmful bacteria, evaporates part of the water, etc., to achieve harmless treatment of the sludge; the harmlessly treated sludge is crushed, stirred, granulated, dried, cooled, screened, etc. to prepare soil conditioner or organic fertilizer for agriculture to improve soil, soil fertility, crop yield, and improve the quality of agricultural products. It can not only eliminate the harm of sludge to the ecological environment, but also turn waste into treasure and realize the comprehensive resource utilization of sludge.

[0018] 2. The utility model is more conducive to soil improvement and plant growth by adding appropriate amounts of macro, medium and micro nutrients necessary for plant growth into the mixing and blending machine. The soil conditioner or organic fertilizer prepared by the utility model contains higher organic matter and plant nutrients than soil conditioners or organic fertilizers prepared with livestock and poultry manure, plant straw, edible fungus residue, etc. as raw materials, and the product quality and effect are significantly better than similar soil conditioners or organic fertilizers, which can better improve soil, increase soil fertility, increase crop yields, and improve the quality of agricultural products.

[0019] 3. The utility model can passivate heavy metal ions in sludge, decompose harmful organic matter, adjust the pH value of materials, and kill harmful bacteria in one step. Compared with the existing technology, the harmless treatment and comprehensive resource utilization are more thorough, the equipment investment and resource utilization costs are lower, and the product quality and application effect are better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the actual production process flow chart of the utility model;

[0021] Description of reference numerals:

[0022] 1. Sludge source, 2. Sludge storage, 3. First conveyor, 4. Aerobic fermentation tank, 5. Metering device, 6. Heavy metal passivator feeder, 7. Harmful organic matter decomposer feeder, 8. pH regulator feeder, 9. Fermentation agent feeder, 10. Tail gas absorption and dust removal system, 11. Second conveyor, 12. First crusher, 13. Dust removal system, 14. Third conveyor, 15. Mixer, 16. Macronutrient feeder, 17. Medium nutrient feeder, 18. Micronutrient Element feeder, 19. Fourth conveyor, 20. Granulator, 21. Binder spray device, 22. Fifth conveyor, 23. Dryer, 24. Air collection and dust removal system, 25. Sixth conveyor, 26. Cooler, 27. Seventh conveyor, 28. Screener, 29. Tenth conveyor, 30. Eleventh conveyor, 31. Second crusher, 32. Twelfth conveyor, 33. Eighth conveyor, 34. Packaging machine, 35. Ninth conveyor, 36. Loader, 37. Finished product warehouse, 38. Blower. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the utility model is not limited by the specific implementation. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] In order to solve the problem that the existing domestic sewage treatment plants do not thoroughly treat the sludge raw materials for harmlessness before preparing fertilizers or soil conditioners, that is, the heavy metal ions contained in the sludge are not completely passivated and inactivated, the harmful organic matter cannot be completely decomposed, the harmful bacteria are not completely killed, and the pH value of the sludge is not adjusted, so that the prepared fertilizers or soil conditioners still contain harmful heavy metal elements (lead, cadmium, chromium, arsenic, mercury), harmful organic compounds and harmful bacteria contained in the sludge, and thus still cause harm to the environment after being applied to the soil.

[0025] Therefore, Figure 1 As shown, the utility model provides a coupling system for harmless treatment of sludge and resource utilization to prepare soil conditioner, which can solve the above-mentioned problems. The coupling system includes: an aerobic fermentation tank 4, a first crusher 12, a mixer 15 and a granulator 20.

[0026] Among them: the inlet of the aerobic fermentation tank 4 is connected to the first conveyor 3 for conveying sludge, the outlet of the aerobic fermentation tank 4 is connected to the second conveyor 11, and the top of the aerobic fermentation tank 4 is connected with a heavy metal ion passivator feeder 6, a harmful organic matter decomposer feeder 7, a pH value regulator feeder 8 and a fermentation agent feeder 9; the inlet of the first crusher 12 is connected to the second conveyor 11, and the outlet of the first crusher 12 is connected to the third conveyor 14; the inlet of the stirring mixer 15 is connected to the third conveyor 14, and the outlet of the stirring mixer 15 is connected to the fourth conveyor 19; the inlet of the granulator 20 is connected to the fourth conveyor 19, and the outlet of the granulator 20 is connected to the fifth conveyor 22; the top of the granulator 20 is connected to the adhesive spray device 21.

[0027] Specifically, a turning mixer is provided inside the aerobic fermentation tank 4 ; the gas input end of the aerobic fermentation tank 4 is connected to the blower 38 .

[0028] The sludge and the heavy metal ion passivator, harmful organic matter decomposer, pH regulator and fermentation bacteria added to the aerobic fermentation tank 4 are regularly turned over by the walking turning mixer, which is beneficial to mixing and harmlessly treating the sludge, passivating and fixing the heavy metals in the sludge, decomposing harmful organic matter, and adjusting the pH value of the sludge. At the same time, air is introduced into the material by the blower 38, which is beneficial to the growth of beneficial bacteria in the fermentation bacteria under aerobic conditions and the killing of harmful pathogens.

[0029] Specifically, a plurality of nutrient element feeders are connected to the top of the mixer 15 for adding nutrient elements that are beneficial to plant growth and soil improvement to the fermented, decomposed and crushed sludge material.

[0030] Specifically, there are three nutrient feeders, including a macronutrient feeder 16, a medium nutrient feeder 17 and a trace nutrient feeder 18, which increase the nutrient content of the soil conditioner by adding macronutrients, mediumnutrients and tracenutrients to the decomposed sludge.

[0031] Specifically, in order to realize automated production, the heavy metal ion passivator feeder 6, the harmful organic matter decomposer feeder 7, the pH value regulator feeder 8, the fermentation agent feeder 9, the macronutrient feeder 16, the medium nutrient feeder 17 and the trace nutrient feeder 18 all include a metering device 5, and the metering device 5 is connected to the controller for regulating the feeding amount of the heavy metal ion passivator feeder 6, the harmful organic matter decomposer feeder 7, the pH value regulator feeder 8, the fermentation agent feeder 9, the macronutrient feeder 16, the medium nutrient feeder 17 and the trace nutrient feeder 18 through the controller.

[0032] Specifically, for the convenience of storage and sales, the fifth conveyor 22 is connected to the entrance of the dryer 23, the outlet of the dryer 23 is connected to the entrance of the cooler 26 through the sixth conveyor 25, the outlet of the cooler 26 is connected to the entrance of the screener 28 through the seventh conveyor 27, the first outlet of the screener 28 is connected to the packaging machine 34 through the eighth conveyor 33, the packaging machine 34 is connected to the loader 36 through the ninth conveyor 35, and the packaged products loaded by the loader 36 are transported to the finished product warehouse 37 for storage.

[0033] Specifically, the second outlet of the screening machine 28 is connected to the granulator 20 through the tenth conveyor 29. The screened material does not need to be crushed again due to its small particle size, so it is sent to the granulator 20 again through the tenth conveyor 29 and re-granulated together with fresh materials.

[0034] Specifically, the third outlet of the screening machine 28 is connected to the inlet of the second crusher 31 through the eleventh conveyor 30, and the outlet of the second crusher 31 is connected to the granulator 20 through the twelfth conveyor 32. Since the material contains large particle size, it needs to be crushed again by the second crusher 31, and the crushed material is returned to the granulator 20.

[0035] Specifically, the aerobic fermentation tank 4 is connected to the tail gas absorption and dust removal system 10 through a first conveying pipe; the first pulverizer 12 is connected to the dust removal system 13 through a second conveying pipe; and the top of the dryer 23 is connected to the gas collection and dust removal system 24 through a third conveying pipe.

[0036] Specifically, the sludge transported by the first conveyor 3 is transported from the sludge source 1 to the sludge storage yard 2 by a sludge transport vehicle, and the sludge in the sludge storage yard 2 is transported to the aerobic fermentation tank 4 through the first conveyor 3 .

[0037] Working principle:

[0038] The sludge is transported from the sludge source 1 to the sludge storage yard 2 by a sludge transport vehicle, and then sent to the aerobic fermentation tank 4 by the first conveyor. Then, the content of heavy metal ions and harmful organic matter in the sludge and the pH value of the sludge are detected by chemical analysis. The heavy metal ion passivator feeder 6, the harmful organic matter decomposer feeder 7, the pH value regulator feeder 8 and the fermentation bacteria feeder are measured by the calculation device 5 and the heavy metal ion passivator, harmful organic matter decomposer, pH value regulator and fermentation bacteria in the fermentation bacteria feeder are sent to the aerobic fermentation tank 4 in appropriate amounts. Then, the sludge and the heavy metal ion passivator, harmful organic matter decomposer, pH value regulator and fermentation bacteria are regularly turned and thrown by the walking turning and throwing mixer. At the same time, air is introduced into the aerobic fermentation tank 4 by the blower 38. After high-temperature fermentation at 55°C-75°C, the sludge in the aerobic fermentation tank 4 is harmlessly treated, the heavy metals in the sludge are passivated and fixed, the harmful organic matter is decomposed, the harmful bacteria are killed, and part of the water is evaporated.

[0039] The decomposed sludge mixture after the fermentation harmless treatment is crushed by the first crusher 12, and the crushed sludge mixture is sent to the mixing mixer 15 through the second conveyor 14. Then, the macronutrients, medium nutrients and trace nutrients in the macronutrient feeder 16, the medium nutrient feeder 17 and the trace nutrient feeder 18 are measured by the calculation device 5 and added into the mixing mixer 15 in appropriate amounts to mix and stir with the crushed sludge. The uniformly mixed material is sent to the granulator 20 through the fourth conveyor 19, and at the same time, the binder spray device 21 is used to spray the material. The binder is sprayed into the granulator 20 for granulation, the granulated material is sent to the dryer 23 for drying via the fifth conveyor 22, the dried soil conditioner or fertilizer is sent to the cooler 26 for cooling via the sixth conveyor 25, the cooled soil conditioner or fertilizer is sent to the screening machine 28 for screening via the seventh conveyor 27, the soil conditioner or fertilizer that meets the particle size requirements after screening is sent to the packaging machine 34 for packaging via the eighth conveyor 33, the packaged soil conditioner or fertilizer is sent to the loader 36 via the ninth conveyor 35, and the loader transports the packaged products to the finished product warehouse 37 to complete product storage. When the sieved particle size does not meet the requirements, it will be sent to the second outlet or the third outlet according to the particle size. The sieved material sent to the second outlet does not need to be crushed again because of its small particle size, so it is sent to the granulator 20 again through the tenth conveyor 29 and re-granulated with fresh materials. The sieved material sent to the third outlet contains materials with large particle sizes, so it needs to be crushed again by the second crusher 31. The crushed material is returned to the granulator 20 and re-granulated with fresh materials. In this way, the harmless treatment of sludge and comprehensive resource utilization are achieved.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coupling system for harmless treatment of sludge and resource utilization to prepare soil conditioner, characterized in that: include: A heavy metal ion passivating agent feeder (6), a harmful organic matter decomposing agent feeder (7), a pH value adjusting agent feeder (8) and a fermentation agent feeder (9) connected to the aerobic fermentation tank (4); The aerobic fermentation tank (4) is provided with a tumbling mixer inside; the gas input end of the aerobic fermentation tank (4) is connected to the blower (38); the inlet of the aerobic fermentation tank (4) is connected to the first conveyor (3) for conveying sludge, and the outlet of the aerobic fermentation tank (4) is connected to the second conveyor (11); the second conveyor (11) is connected to the inlet of the first crusher (12), and the outlet of the first crusher (12) is connected to the third conveyor (14); the third conveyor (14) is connected to the inlet of the stirring mixer (15), and the outlet of the stirring mixer (15) is connected to the fourth conveyor (19); the fourth conveyor (19) is connected to the inlet of the granulator (20), and the outlet of the granulator (20) is connected to the fifth conveyor (22); the top of the granulator (20) is connected to the adhesive spraying device (21).

2. The coupling system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 1, characterized in that: The top of the stirring mixer (15) is connected to a plurality of nutrient element feeders.

3. The coupling system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 2, characterized in that: There are three nutrient element feeders, including a macronutrient element feeder (16), a medium nutrient element feeder (17) and a trace nutrient element feeder (18).

4. The coupling system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 3, characterized in that: The heavy metal ion passivator feeder (6), the harmful organic matter decomposer feeder (7), the pH value regulator feeder (8), the fermentation agent feeder (9), the macronutrient feeder (16), the medium nutrient feeder (17) and the trace nutrient feeder (18) all comprise a metering device (5), and the metering device (5) is connected to a controller and is used for regulating the feeding amount of the heavy metal ion passivator feeder (6), the harmful organic matter decomposer feeder (7), the pH value regulator feeder (8), the fermentation agent feeder (9), the macronutrient feeder (16), the medium nutrient feeder (17) and the trace nutrient feeder (18) through the controller.

5. The coupling system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 1, characterized in that: The fifth conveyor (22) is connected to the inlet of the dryer (23), the outlet of the dryer (23) is connected to the inlet of the cooler (26) through the sixth conveyor (25), the outlet of the cooler (26) is connected to the inlet of the screening machine (28) through the seventh conveyor (27), the first outlet of the screening machine (28) is connected to the packaging machine (34) through the eighth conveyor (33), the packaging machine (34) is connected to the loader (36) through the ninth conveyor (35), and the packaged products loaded by the loader (36) are transported to the finished product warehouse (37) for storage.

6. The coupled system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 5, characterized in that: The second outlet of the screening machine (28) is connected to the granulator (20) through the tenth conveyor (29).

7. The coupled system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 6, characterized in that: The third outlet of the screening machine (28) is connected to the inlet of the second pulverizer (31) through the eleventh conveyor (30), and the outlet of the second pulverizer (31) is connected to the granulator (20) through the twelfth conveyor (32).

8. The coupled system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 5, characterized in that: The aerobic fermentation tank (4) is connected to the tail gas absorption and dust removal system (10) through a first conveying pipe; the first pulverizer (12) is connected to the dust removal system (13) through a second conveying pipe; and the top of the dryer (23) is connected to the gas collection and dust removal system (24) through a third conveying pipe.

9. The coupled system for harmless treatment of sludge and resource utilization to prepare soil conditioner according to claim 1, characterized in that: The sludge transported by the first conveyor (3) is transported from a sludge source (1) to a sludge storage yard (2) by a sludge transport vehicle, and the sludge in the sludge storage yard (2) is transported to an aerobic fermentation tank (4) via the first conveyor (3).

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