CN206502756U - A kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer - Google Patents

Abstract

The utility model discloses a device for producing organic fertilizer by mixing excess sludge with kitchen waste and producing methane, which comprises a sludge hopper, a kitchen waste hopper, a mixing bin, a crushing wheel knife, an air lock, a feeding pipe, and a Oxygen fermenter, paddle agitator, sensor module, heat exchange sleeve, porous partition, discharge port, drain port, exhaust pipe, granulator, crawler belt, dryer, methane collector, air purifier, Vent the tube. Compared with the prior art, the utility model pulverizes the kitchen waste and mixes it with the remaining sludge of the urban sewage treatment plant, and then carries out anaerobic fermentation in the anaerobic fermentation tank. The methane produced by the fermentation is collected and utilized, and the solid residue after fermentation is For the production of organic fertilizer, the device has the characteristics of simple structure, stable and reliable operation, good system sealing and high safety.

Description

A device for producing organic fertilizer by mixing excess sludge with kitchen waste to produce methane

technical field

The utility model relates to a solid waste treatment device, which belongs to the field of resource utilization of solid waste, in particular to a device for producing methane from surplus sludge mixed with kitchen waste to produce organic fertilizer.

Background technique

Excess sludge is a by-product produced in the process of treating domestic sewage by activated sludge method. Its output is large, its moisture content is high, and resource utilization is difficult. Especially in recent years, the urbanization process has accelerated, and the per capita water consumption has increased. The substantial increase in the sewage treatment rate has led to a rapid increase in the output of excess sludge in urban sewage treatment plants. Excess sludge has become an important source of urban solid waste and an important part of the garbage siege. It is different from other solid waste Because the remaining sludge contains a large amount of organic matter, animal and plant (microorganism) residues, fiber, heavy metals, etc., if it cannot be properly treated, it will definitely cause serious harm to the ecological environment. Containing a large amount of water, it is very difficult to transport and transfer. Therefore, the treatment of excess sludge has its own unique requirements. It needs to be treated as soon as possible and nearby, and it needs to be stabilized, harmless, and preferably resource-based. The disposal methods of typical urban domestic sewage residual sludge mainly include resource utilization (such as preparation of building materials, roadbed materials, etc.), energy utilization (such as oil production, gas production, incineration power generation, protein extraction), land utilization (such as composting, soil improvement, etc.) etc.), landfill, etc.

Kitchen waste refers to the waste generated in the daily life of residents and activities such as food processing, catering services, and unit meals, including discarded vegetable leaves, leftovers, leftovers, fruit peels, eggshells, tea dregs, bones, etc. The main sources are home kitchens, restaurants, restaurants, canteens, markets and other industries related to food processing. It has the characteristics of high moisture content, perishability, and rich nutrients. If it cannot be properly treated and disposed of, it will cause harm to the living environment and human health. In recent years, due to the development of the economy, the improvement of people's living standards, and the unprecedented development of the catering industry, the amount of kitchen waste has increased greatly. As the times require, a large number of kitchen waste processors have emerged. There are two main types of garbage processors. One is to crush kitchen waste and discharge it into the municipal pipe network. This kind of kitchen waste treatment device is commonly used to treat domestic kitchen waste; The treatment device is generally suitable for large-scale kitchen waste treatment, and is often used in large canteens, restaurants, and hotels. The principle of the first type of kitchen waste disposer to deal with kitchen waste is to discharge the kitchen waste into the sewer pipe after being washed with a large amount of water. This method does not fundamentally treat the kitchen waste, but treats the solid The remaining garbage is crushed and transported to the urban sewage treatment plant through the municipal pipe network. This treatment method has a large number of potential hazards, such as the waste of a large amount of water resources, the increase in the treatment capacity of the sewage treatment plant, the increase in the water pollution load of the sewage treatment plant, and the municipal The deposition and congestion of the pipe network, the increase in the infrastructure cost and maintenance cost of the sewage pipe network, etc. The treatment principle of the second type of kitchen waste is that after the kitchen waste is crushed, the kitchen waste is anaerobically fermented under suitable environmental conditions to reduce the amount of kitchen waste. The operation of this type of kitchen waste processor is stable At the same time, due to the generation of methane and hydrogen sulfide gas during anaerobic fermentation, it is easy to cause peculiar smell in the air of restaurants, canteens and hotels.

Utility model content

The purpose of the utility model is to provide a device for producing organic fertilizer by mixing residual sludge with kitchen waste to produce organic fertilizer in order to solve the problem of resource utilization of remaining sludge from urban domestic sewage and kitchen waste.

The utility model achieves the above-mentioned purpose through the following technical solutions: a device for producing organic fertilizer by mixing surplus sludge with kitchen waste, including 10 sludge hoppers, 11 kitchen waste hoppers, 12 mixing bins, and 13 crushing wheels Knife, 14 air locker, 15 feed pipe, 2 anaerobic fermentation tank, 21 paddle agitator, 22 sensor module, 23 heat exchange sleeve, 24 porous partition, 25 discharge port, 26 drain port, 27 row Air pipe, 3 granulator, 30 crawler, 4 dryer, 5 methane collector, 6 air cleaner, 60 vent pipe.

Further, a crushing wheel knife 13 is installed at the center of the mixing bin 12 .

Further, the air locker 13 is a hammer type air locker.

Further, the upper and lower ends of the anaerobic fermentation tank 2 are flanged to the tank body, which is convenient for disassembly and maintenance. The anaerobic fermentation tank 2 is provided with the paddle agitator at the center along the axial direction 21. The exhaust pipe 27 is provided on the top, the sensor module 22 is installed on the inner wall of the top, the porous partition 24 is provided at the middle and lower part, and the drain pipe 26 is provided at the bottom.

Further, the sensor module 22 includes at least a temperature sensor, a pressure sensor, a pH sensor and a liquid level sensor.

Further, hot water or cold water is passed into the heat exchange sleeve 23 to keep the temperature in the anaerobic fermentation tank 2 at 48-58°C.

Further, the granulator 3 is preferably a pan granulator.

Further, the dryer 4 is preferably a tray dryer.

The sludge hopper 10 and the kitchen waste hopper 11 are all connected to the mixing bin 12 through pipelines, and are connected by flange sealing. The bottom of the mixing bin 12 is equipped with the air locker 14, and the The air locker 14 communicates with the anaerobic fermenter 2 through the feed pipe 15, and is sealed by a flange. The anaerobic fermenter 2 is a tank-type device, and the outer wall is covered with the The heat exchange sleeve 23, the axial center position of the anaerobic fermentation tank 2 is equipped with the paddle agitator 21, the top of the anaerobic fermentation tank 2 is perforated and an exhaust pipe 27 is installed, The top inner wall of the anaerobic fermentation tank 2 is equipped with the sensor module 22, and the lower part of the anaerobic fermentation tank 2 is welded with a porous partition plate 24 obtained by opening holes in a stainless steel plate; The bottom of the fermenter 2 is provided with the drain port 26; the side wall of the anaerobic fermenter 2 has the discharge port 25 above the porous partition 24; The port 25 is communicated with the granulator 3 through a pipeline; the granulator 3 is communicated with the dryer 4 through a crawler belt 30; the anaerobic fermentation tank 2 is communicated with the methane collector 5 It communicates with the exhaust pipe 27, the end of the methane collector 5 is connected with the air cleaner 6, and the air cleaner 6 is provided with an emptying pipe 60. All devices in the system and between devices and pipelines are connected by flange seals.

The beneficial effect of the utility model lies in that the utility model is a device for producing organic fertilizer by mixing surplus sludge with kitchen waste and producing methane. When the temperature and pressure are appropriate, anaerobic and facultative bacteria will hydrolyze the pulverized kitchen waste and the remaining sludge of urban sewage treatment plants, and convert the macromolecular organic matter in solid waste into soluble Small-molecule organic monomers, these soluble organic substances continue to ferment under the action of microorganisms to generate hydrogen, formic acid, bicarbonate, pyruvate, ethanol and various volatile lower fatty acids. Next, hydrogen-producing acetogenic bacteria Under the action of simple organic matter is converted into acetic acid and hydrogen, bicarbonate is converted into acetic acid, and finally, under the action of methanogenic bacteria, acetic acid, hydrogen, and carbon dioxide are converted into methane, and the solid residue after hydrolysis can be prepared as agricultural organic fertilizer. The device not only realizes the recycling of solid waste, but also converts the organic pollutants that have potential threats to the environment in the residual sludge of urban sewage treatment plants into energy, and the solid clinker after hydrolysis is converted into agricultural organic fertilizer. The structure of the device Simple, stable and reliable operation, good system sealing and high safety.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 Schematic diagram of the mixing bin structure.

Figure 3 is a schematic diagram of the structure of the air locker.

In Figures 1 to 3: 10-sludge hopper, 11-kitchen waste hopper, 12-mixing bin, 13-crushing wheel knife, 14-air locker, 15-feeding pipe, 2-anaerobic fermentation tank, 21-paddle agitator, 22-sensor module, 23-heat exchange sleeve, 24-porous partition, 25-outlet, 26-drain, 27-exhaust pipe, 3-granulator, 30- Tracks, 4-dryer, 5-methane collector, 6-air cleaner, 60-vent pipe.

detailed description

Below in conjunction with accompanying drawing 1～3, the utility model is further described:

As shown in Figures 1 to 3: the utility model includes a sludge hopper 10, a kitchen waste hopper 11, a mixing bin 12, a crushing wheel knife 13, an air lock 14, a feeding pipe 15, an anaerobic fermentation tank 2, a paddle type agitator 21, sensor module 22, heat exchange sleeve 23, porous partition 24, discharge port 25, drain port 26, exhaust pipe 27, granulator 3, crawler belt 30, dryer 4, methane collector 5, air purifier 6, vent pipe 60.

As shown in Figures 1 to 3: the sludge after preliminary dehydration in the sludge dehydration workshop of the urban sewage treatment plant is transported to the sludge hopper 10 for standby use, and the kitchen waste is transported to the kitchen waste hopper 11 for standby use. When the equipment is running, the sewage The sludge in the mud hopper 10 and the kitchen waste in the kitchen waste hopper 11 enter the mixing bin 12 and are crushed by the crushing wheel knife 13. When enough remaining sludge and kitchen waste are mixed in the mixing bin, the air lock The counterweight 1 of the device 14 moves upward, the upper flap is opened, the evenly mixed remaining sludge and kitchen waste enter the air lock 14, the upper flap is closed, the counterweight 2 moves upward, and the lower flap of the air lock 14 Open, and the uniformly mixed surplus sludge and kitchen waste enter the anaerobic fermentation tank 2 through the feed pipe 15, and are further mixed after being stirred by the paddle agitator 21, and the mixed surplus sludge and kitchen waste mixture is dispersed in the porous On the partition 24, the solid-liquid separation is initially carried out by gravity on the porous partition 24, the solid phase mixture is anaerobically fermented under the action of anaerobic bacteria, and the liquid phase penetrates the porous partition 24 and enters the bottom of the anaerobic fermentation tank 2 , when the liquid level reaches a certain height, the drain port 26 at the bottom of the anaerobic fermentation tank 2 is opened, and the liquid phase is discharged and circulated to the wastewater treatment link for treatment. It is provided that when the temperature, pressure, and pH value in the anaerobic fermentation tank 2 are suitable for the reproduction of anaerobic bacteria and facultative bacteria, the anaerobic bacteria and facultative bacteria decompose the organic matter in the remaining sludge and kitchen waste, and the solid waste The macromolecular organic matter is converted into soluble small molecular organic monomers, and these soluble organic matter continue to ferment under the action of microorganisms to generate hydrogen, formic acid, bicarbonate, pyruvate, ethanol and various volatile lower fatty acids, and then , under the action of hydrogen-producing acetogenic bacteria, simple organic matter is converted into acetic acid and hydrogen, bicarbonate is converted into acetic acid, and finally, under the action of methanogenic bacteria, acetic acid, hydrogen, and carbon dioxide are converted into methane, and the methane gas produced It is discharged into the methane collector 5 through the exhaust pipe 27 to collect methane gas, and other non-methane gases are discharged. After being purified by the air cleaner 6, they are discharged from the vent pipe 60. The temperature and pH value in the anaerobic fermentation tank 2 The pressure and pressure are monitored and obtained by the sensor module 22, and the reaction in the anaerobic fermentation tank 2 is controlled according to the monitoring results. After the anaerobic fermentation process is completed, the solid-phase mixture, that is, the clinker of the anaerobic fermentation, becomes the raw material for preparing organic fertilizer, and the output The mouth 25 is opened, and the clinker of anaerobic fermentation is transported to the granulator 3 through the pipeline for organic fertilizer granulation, and the organic fertilizer obtained from the granulation is transported to the dryer 4 through the crawler belt 30 for drying, and then bagged for sale.

Claims (7)

1. a kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer, it is characterised in that：Including：Sludge bucket （10）, rubbish from cooking bucket（11）, blending bunker（12）, broken flywheel knife（13）, flapper（14）, feed pipe（15）, anaerobic fermentation tank （2）, dasher（21）, sensor assembly（22）, heat exchange sleeve（23）, porous barrier（24）, discharging opening（25）, discharge outlet （26）, blast pipe（27）, comminutor（3）, crawler belt（30）, dryer（4）, methane collection device（5）, air purifier（6）, emptying Pipe（60）；Sludge bucket（10）, rubbish from cooking bucket（11）Blending bunker is connected to by pipeline（12）, and connected using flange seal Connect, blending bunker（12）Bottom is provided with flapper（14）, flapper（14）Pass through feed pipe（15）With anaerobic fermentation tank（2）Even It is logical, and pass through flange seal；Anaerobic fermentation tank（2）For pot type device, outside wall surface is coated with heat exchange sleeve（23）, anaerobic fermentation tank （2）Connected up and down between two end sockets and tank body using flange, anaerobic fermentation tank（2）Axial centre position is provided with dasher （21）, anaerobic fermentation tank（2）Top drilling and blast pipe is installed（27）, anaerobic fermentation tank（2）Top inner wall face install There is sensor assembly（22）, anaerobic fermentation tank（2）Middle and lower part is welded with porous barrier obtained by stainless steel plate perforate（24）, anaerobism Fermentation tank（2）Bottom is provided with discharge outlet（26）, anaerobic fermentation tank（2）Side wall, in porous barrier（24）Top be provided with out Material mouth（25）；Discharging opening（25）With comminutor（3）Pass through pipeline communication, comminutor（3）With dryer（4）Pass through crawler belt（30）Even It is logical, anaerobic fermentation tank（2）With methane collection device（5）Pass through blast pipe（27）Connection, methane collection device（5）It is net that end is connected to air Change device（6）, air purifier（6）It is provided with blow-down pipe（60）, between each device in system and each device is used with pipeline enclosure Flange seal is connected.

2. a kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer according to claim 1, its feature It is：Described blending bunker center is provided with described broken flywheel knife.

3. a kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer according to claim 1, its feature It is：Described flapper is Weight type flapper.

4. a kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer according to claim 1, its feature It is：Described sensor assembly comprises at least temperature sensor, pressure sensor, pH sensors and liquid level sensor.

5. a kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer according to claim 1, its feature It is：The temperature in hot water or cold water, the described anaerobic fermentation tank of holding is passed through in described heat exchange sleeve at 48 ~ 58 DEG C.

6. a kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer according to claim 1, its feature It is：Described comminutor is preferably pan-type pelletizer.

7. a kind of device of excess sludge mixture rubbish from cooking methane phase organic fertilizer according to claim 1, its feature It is：Described dryer is preferably tray drier.