An integrated aquaculture sludge preparation granular fertilizer device

Abstract

The invention discloses an integrated device for preparing granular fertilizer from aquaculture sludge, which comprises a shell body I, a composting unit, a spiral elevator dryer, and a roller brush. The composting unit is arranged in the shell body, a feed port is opened at the top of the shell body I and is connected to the composting unit, the spiral elevator dryer is sleeved on the outside of the composting unit, a plurality of roller brushes are movably arranged between the inner wall of the shell body I and the spiral elevator dryer, a loading conveyor belt is arranged in the spiral elevator dryer, and the loading conveyor belt at the outlet extends along the roller brush to the bottom entrance of the spiral elevator dryer, the bottom outlet of the composting unit is arranged above the loading conveyor belt at the entrance of the spiral elevator dryer, a fertilizer granule outlet is opened at the shell body I below the roller brush, and a thermal insulation layer is arranged in the shell body I; the device of the invention strengthens aerobic composting of aquaculture sludge through temperature control and magnetic field action, and dries the sludge to prepare granular fertilizer at the temperature generated by the composting unit. The device has the advantages of simple structure and operation, high efficiency, high economic benefit, and the like.

Description

Technical Field

[0001] The invention belongs to the field of aquaculture sludge treatment and recovery, and particularly relates to an integrated aquaculture farm sludge granular fertilizer making device. Background Art

[0002] During the livestock and poultry farming process, the sludge generated by wastewater treatment usually contains a large amount of organic matter and nutrients, and has potential resource utilization value. However, the sludge treatment methods in the prior art, such as composting, incineration, landfill, etc., have problems such as high cost, complex operation, waste of resources, and low treatment efficiency. Therefore, there is an urgent need for a device that can efficiently and economically treat livestock and poultry farm sludge and convert it into granular fertilizer. By effectively treating farm sludge and converting it into granular fertilizer, not only can the discharge of waste be reduced, but also the efficiency of resource utilization can be improved, the breeding cost can be reduced, and the goals of circular economy and sustainable development can be achieved. Summary of the Invention

[0003] The present invention provides an integrated device for preparing granular fertilizer from aquaculture sludge, so as to solve the problems of low resource utilization rate, low treatment efficiency, complex treatment equipment and high cost of existing aquaculture sludge.

[0004] The device for preparing granular fertilizer from integrated aquaculture sludge of the present invention comprises a shell body I, a composting unit, a spiral elevator dryer, and a roller brush. The composting unit is arranged in the shell body, a feed port is opened at the top of the shell body I and is connected to the composting unit, the spiral elevator dryer is sleeved on the outside of the composting unit, a plurality of roller brushes are movably arranged between the inner wall of the shell body I and the spiral elevator dryer, a loading conveyor belt is arranged in the spiral elevator dryer, and the loading conveyor belt at the outlet extends along the roller brush to the bottom entrance of the spiral elevator dryer, the bottom outlet of the composting unit is arranged above the loading conveyor belt at the entrance of the spiral elevator dryer, a fertilizer granule outlet is opened at the shell body I below the roller brush, and a heat-insulating layer is arranged in the shell body I.

[0005] The composting unit includes a shell II, which is provided with an aquaculture sludge inlet and is connected to the feed port of shell I. A front composting chamber and a rear composting chamber are arranged in shell II, an agitator is arranged in the front composting chamber, and a valve I is arranged on the discharge port at the lower end of the front composting chamber; the rear composting chamber is located below the front composting chamber and a valve II and an adjustable scraper are arranged at its discharge port, and a spiral electrode is arranged in the interlayer of shell II and acts on the front composting chamber and the rear composting chamber.

[0006] The aerobic composting cycle of the front composting chamber is 5 to 8 days, the composting temperature is controlled at 60 to 80°C, the composting humidity is 50% to 60%, the amount of composting supplementary fermentation agent added is 50 to 150 g / t, the amount of deodorant added is 0.25 to 1 kg / t, the stirring cycle is once every 2 to 3 days, each time for 2 to 4 hours, and the rear composting chamber is a temporary storage and fermentation chamber for fertilizer.

[0007] The spiral electrode is made of one of nickel-chromium alloy, iron-chromium-aluminum alloy and tungsten alloy; the heat-insulating layer is made of polystyrene filler.

[0008] The adjustable sludge scraper controls the thickness of the fermentation product on the loading conveyor belt to be 1-8 mm, and a groove with a depth of 10 mm is provided on the loading conveyor belt.

[0009] The device also includes a temperature and humidity monitor and a controller. The controller is respectively connected to the spiral electrode, the stirrer, the material conveyor belt, the temperature and humidity monitor, and the valve I. The controller is a conventional controller that uses conventional methods to control the opening and closing of the connection components.

[0010] The beneficial results of the present invention are:

[0011] 1. The present invention reduces sludge discharge, improves resource utilization efficiency, reduces aquaculture costs, and achieves the goals of circular economy and sustainable development through integrated treatment of aquaculture sludge;

[0012] 2. The present invention uses spiral electrodes to provide a magnetic field and ensure fermentation temperature to kill pathogens, parasite eggs, and passivate heavy metals, thereby achieving the purpose of harmless sludge treatment and reducing the fermentation cycle;

[0013] 3. The integrated device for preparing granular fertilizer from aquaculture sludge provided by the present invention fully utilizes the high temperature generated by the composting process by adopting front and rear composting chambers, and dries sludge sheets with a thickness of 1 to 8 mm into mud blocks under the lifting and transportation of a spiral elevator dryer, and then forms granules for recovery under the action of a roller brush. This process achieves the purpose of fertilizerization and granulation of aquaculture sludge, and the operation is also simple, with the characteristics of low processing cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the integrated aquaculture sludge preparation granular fertilizer device;

[0015] Figure 2 Schematic diagram of the composting unit structure;

[0016] Figure 3 Schematic diagram of the adjustable scraper structure;

[0017] In the figure: 1-shell I, 2-composting unit, 3-front composting chamber, 4-mixer, 5-aquaculture sludge inlet, 6-spiral electrode, 7-valve I, 8-rear composting chamber, 9-valve II, 10-adjustable scraper, 11-spiral lifting dryer, 12-shell II, 13-loading conveyor belt, 14-roller brush, 15-fertilizer particle outlet, 16-insulation layer. DETAILED DESCRIPTION

[0018] In order to make the purpose and advantages of the embodiments of the present invention clearer, the process flow in the embodiments of the present invention will be clearly and completely described below in combination with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0019] like Figure 1 As shown, in the following embodiment, the integrated aquaculture sludge preparation granular fertilizer device includes a shell I1, a composting unit 2, a spiral lifting dryer 11, and a roller brush 14. A feed port is opened on the top of the shell I, and the composting unit is arranged in the shell. The composting unit 2 includes a shell II12, a sludge inlet 5 is opened on the shell II and is connected to the feed port of the shell I. A front composting chamber 3 and a rear composting chamber 8 are provided in the shell II. A stirrer 4 is provided in the front composting chamber 3, and a valve I7 is provided on the lower end discharge port of the front composting chamber 3; the rear composting chamber 8 is located below the front composting chamber and a valve II9 and an adjustable scraper 10 are provided at its discharge port. The spiral electric Electrode 6 is arranged in the interlayer of shell II and acts on the front composting chamber and the rear composting chamber; the spiral elevator dryer is set on the outside of the composting unit, and several roller brushes are movably arranged between the inner wall of shell I and the spiral elevator dryer. A loading conveyor belt 13 is provided in the spiral elevator dryer, and the loading conveyor belt at the outlet extends along the roller brush to the bottom entrance of the spiral elevator dryer. The bottom outlet of the composting unit is arranged above the loading conveyor belt at the entrance of the spiral elevator dryer. A fertilizer particle outlet 15 is opened at shell I below the roller brush. A polystyrene insulation layer 16 is provided in shell I, and a groove with a depth of 10 mm is provided on the loading conveyor belt.

[0020] Example 1: The spiral electrode of the device of this embodiment is a nickel-chromium alloy electrode. First, the aquaculture sludge enters the front composting chamber 3 through the feed port of shell I and the aquaculture sludge inlet 5 of shell II. During the composting process, the spiral electrode 6 is started to control the compost temperature at 60~70℃ and the compost humidity at 50%~55%. The amount of EM compost fermentation agent added during the composting process is 100g / t, and the amount of strong microbial deodorant added is 0.5kg / t. The agitator 4 is used for stirring during the composting process, and the stirring cycle is controlled to once every 2 days, each time for 3 hours. After the aquaculture sludge composting is completed, the valve I7 is opened to allow the fertilizer to fall into the rear composting chamber 8 for temporary storage.

[0021] Granulation process: Open valve II9 to allow the fertilizer in the rear composting chamber to fall into the loading conveyor 13. Through the movement of the loading conveyor 13, the fermentation product falling onto the loading conveyor forms a layer with a thickness of 5 mm under the action of the adjustable scraper 10. The loading conveyor moves from bottom to top in the spiral elevator dryer. At the same time, the heat generated by the composting unit is used to dry the fermentation product. The loading conveyor carrying the dried fermentation product is sent out from the outlet of the spiral elevator dryer, and under the action of the roller brush 14, granules are formed and enter the fertilizer granule outlet 15 for collection.

[0022] Example 2: The spiral electrode of the device of this embodiment is a tungsten alloy electrode. The device also includes a temperature and humidity monitor and a controller. The controller is respectively connected to the spiral electrode, the stirrer, the material conveyor belt, the temperature and humidity monitor, and the valve I. The controller is a conventional controller and uses conventional methods to control the opening and closing of the connection components.

[0023] First, the aquaculture sludge enters the front composting chamber 3 through the feed port of shell I and the aquaculture sludge inlet 5 of shell II. During the composting process, the spiral electrode 6 is activated to control the compost temperature at 65-70°C and the compost humidity at 55%-60%. During the composting process, the EM composting starter is added at a rate of 120g / t and the Yiqiang microbial deodorant is added at a rate of 1kg / t. The composting process is stirred by the stirrer 4, and the stirring cycle is controlled to be once every three days, each time for 2 hours. After the aquaculture sludge composting is completed, the valve I 7 is opened to allow the fertilizer to fall into the rear composting chamber 8 for temporary storage.

[0024] Granulation process: Open valve II9 to allow the fertilizer in the rear composting chamber to fall into the loading conveyor 13. Through the movement of the loading conveyor 13, the fermentation product falling onto the loading conveyor forms a layer with a thickness of 8 mm under the action of the adjustable scraper 10. The loading conveyor moves from bottom to top in the spiral elevator dryer. At the same time, the heat generated by the composting unit is used to dry the fermentation product. The loading conveyor carrying the dried fermentation product is sent out from the outlet of the spiral elevator dryer, and under the action of the roller brush 14, granules are formed and enter the fertilizer granule outlet 15 for collection.

Claims

1. An integrated device for preparing granular fertilizer from aquaculture sludge, characterized by: The invention comprises a housing I (1), a composting unit (2), a spiral elevator dryer (11), and a roller brush (14), wherein the composting unit is arranged in the housing, a feed port is opened at the top of the housing I and is connected to the composting unit, the spiral elevator dryer is mounted on the outside of the composting unit, a plurality of roller brushes are movably arranged between the inner wall of the housing I and the spiral elevator dryer, a loading conveyor belt (13) is arranged in the spiral elevator dryer, and the loading conveyor belt at the outlet extends along the roller brush to the bottom entrance of the spiral elevator dryer, the bottom outlet of the composting unit is arranged above the loading conveyor belt at the entrance of the spiral elevator dryer, a fertilizer particle outlet (15) is opened at the housing I below the roller brush, and a heat-insulating layer (16) is arranged in the housing I; The composting unit (2) comprises a shell II (12), wherein a sludge inlet (5) is provided on the shell II (12) and is communicated with a feed port of the shell I, a front composting chamber (3) and a rear composting chamber (8) are provided in the shell II, a stirrer (4) is provided in the front composting chamber (3), and a valve I (7) is provided on the discharge port at the lower end of the front composting chamber (3); the rear composting chamber (8) is located below the front composting chamber and a valve II (9) and an adjustable scraper (10) are provided at the discharge port thereof, a spiral electrode (6) is provided in the interlayer of the shell II and acts on the front composting chamber and the rear composting chamber; the adjustable scraper controls the thickness of the fermentation product on the loading conveyor belt to be 1 to 8 mm; The conveyor belt carrying the dried fermentation product is sent out from the spiral elevator dryer outlet, and particles are formed under the action of the roller brush (14) and enter the fertilizer particle outlet (15) for collection.

2. The device for preparing granular fertilizer from integrated aquaculture sludge according to claim 1 is characterized in that: The aerobic composting cycle in the front composting room is 5 to 8 days. The amount of fermentation agent added during the composting process is 50 to 150 g / t, the amount of deodorant added is 0.25 to 1 kg / t, the stirring cycle is once every 2 to 3 days, and each time is 2 to 4 hours. The rear composting room is a temporary storage and fermentation room for fertilizer.

3. The device for preparing granular fertilizer from integrated aquaculture sludge according to claim 2 is characterized in that: The spiral electrode is made of one of nickel-chromium alloy, iron-chromium-aluminum alloy and tungsten alloy; the heat-insulating layer is a polystyrene layer.

4. The device for preparing granular fertilizer from integrated aquaculture sludge according to claim 1 is characterized in that: The loading conveyor belt is provided with grooves with a depth of 10 mm.

5. The device for preparing granular fertilizer from integrated aquaculture sludge according to claim 1 is characterized in that: The compost temperature is controlled at 60~80℃ and the compost humidity is 50%~60%.

6. The device for preparing granular fertilizer from integrated aquaculture sludge according to claim 1 is characterized in that: It also includes a temperature and humidity monitor and a controller. The controller is connected to the spiral electrode, the stirrer, the material-carrying conveyor belt, the temperature and humidity monitor, and the valve I respectively.

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