CN204607825U - Recycling system after a kind of cow dung reprocessing - Google Patents

Abstract

The utility model belongs to the field of treatment and utilization of livestock and poultry manure, in particular to a recycling system for cow manure after reprocessing. A separator and a cow dung drying room, the cow dung drying room is connected with a heating source biogas combustion chamber, and the biogas combustion chamber is connected to an anaerobic fermentation tank through a biogas delivery pipeline, and the connection between the biogas combustion chamber and the anaerobic fermentation tank A desulfurization tower is arranged between them, and the liquid separated by the dry-wet separator flows to the digester. The utility model separates biogas recovery from fermented manure from biogas slurry utilization, increases the utilization of biogas, reduces the pollution during biogas slurry irrigation and facilitates the utilization of biogas slurry, and the biogas produced by anaerobic fermentation of cow manure A large amount of biogas is used to heat and dry the solid residue in the process of manure recycling to prepare cattle bedding materials, so as to achieve the purpose of recycling.

Description

A recycling system for cow manure after reprocessing

technical field

The utility model belongs to the field of livestock and poultry manure treatment and utilization, in particular to a recycling system for cow manure after reprocessing, more specifically, relates to a solid material obtained after processing and reprocessing cow manure as a raw material for use as a bedding material for cow beds A system in which liquids are used for crop irrigation.

Background technique

As a kind of animal organic fertilizer, cow dung is a precious resource. Cattle eat a lot of food and excrete more feces and urine than other livestock every day. An adult cow excretes 28.4-48.1kg per day and night. The daily urine output ranges from 6.5 to 14.1kg. A large amount of cow dung not only pollutes the air and water sources, but also occupies a large area of land. At present, the treatment methods of cow dung at home and abroad are mainly used for composting and biogas production.

Using composting treatment method, cow dung is processed by biochemical processing technology to make green organic fertilizer, but due to the compact texture of cow dung, the composition is similar to that of pig manure, the water content in the manure is high, the aeration is poor, the decomposition is slow, the fermentation temperature is low, and the fertilizer efficiency Slow, so it is customary to call cow dung "cold fertilizer".

Using a simple treatment method for preparing biogas, such as directly fermenting a large amount of cow dung in anaerobic fermentation equipment to produce a large amount of biogas, after fermentation, the treatment method for the remaining residue is usually unsatisfactory.

In order to solve the above problems, various solutions have appeared at present. For example, Chinese patent literature discloses a new type of cow manure treatment system [Patent No. ZL201320634426.3], which consists of a septic tank, a solid-liquid separator, a drying Composed of a device, a pulverizer, and a biogas digester, the cow manure is sent to the solid-liquid separator through the raw material conveying pipe by the manure flushing pump for solid-liquid separation, and the separated solid cow manure is output from the outlet of the solid-liquid separator. Enter the drier for drying treatment, the dried cow manure is processed into cow bedding material through the crushing system, and the separated liquid enters the underground biogas digester through the separation liquid output pipe.

The liquid separated by the above technical scheme achieves zero discharge and will not pollute the environment, but it has at least three defects: 1. The utilization rate of feces is not high, no effective anaerobic fermentation process is carried out and only for biogas Therefore, the generated biogas is very limited, especially the utilization of the generated biogas is lacking, and a recycling system cannot be formed, that is, the biogas generated by the feces itself is used for the heating and drying of solid feces ; 2. Since biogas is produced from anaerobic fermentation equipment, especially when it is fermented at medium temperature or high temperature, it carries a large amount of H ₂ S. Since there is still a large amount of water vapor in the biogas, the water and H ₂ S in the biogas Together, they accelerate corrosion and clogging of metal pipes, valves and flowmeters. In addition, H ₂ S burns to generate SO _{2 ,} which combines with water vapor in the combustion product to form sulfurous acid, which causes corrosion on the metal surface of the equipment, and also causes pollution to the atmospheric environment and affects human health. Therefore, before using the biogas, the H ₂ S in it must be removed; 3. The biogas slurry fermentation and biogas slurry utilization in the biogas digester are integrated. Environmental protection treatment will produce serious pungent odor and pollute the environment. Based on the above, this case arises.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and to provide a kind of recycling of cow dung after reprocessing, which uses cow dung as raw material to process and reprocess the solids obtained for cattle bedding and liquid for crop irrigation. system.

The technical solution adopted by the utility model to solve the problem is:

A cow dung recycling system after reprocessing, according to the cow dung treatment process, sequentially includes a cowshed, a manure collection tank, a homogenization tank, an anaerobic fermentation tank, a dry-wet separator and a cow dung drying room, the cow dung The drying chamber is connected with a heating source biogas combustion chamber, and the biogas combustion chamber is connected to the anaerobic fermentation tank through a biogas transmission pipeline. A desulfurization tower is arranged between the biogas combustion chamber and the anaerobic fermentation tank. It flows to the biogas slurry tank, and the biogas slurry from the biogas slurry tank is pumped to the farmland that needs to be irrigated.

In the aforesaid cow dung recycling system after reprocessing: the desulfurization tower is respectively connected to the biogas combustion chamber and the heating water tower through the biogas pipeline.

In the above-mentioned cow dung recycling system after reprocessing: the heating water tower is connected to the anaerobic fermentation tank, and the hot water is transported to the inner wall interlayer of the anaerobic fermentation tank through the hot water delivery pipeline.

In the above-mentioned recycling system after reprocessing cow dung: a partition for isolating long thick fibers is also provided between the manure collecting tank and the homogenizing tank.

In the aforesaid cow dung recycling system after reprocessing: the manure collection tank is connected with the biogas slurry tank through a pump.

In the aforesaid cow dung recycling system after reprocessing: the cow dung drying chamber is provided with a cow dung conveying auger.

In the above-mentioned cow dung recycling system after reprocessing: the cow dung drying chamber is also provided with a heat exhaust gas pipeline.

In the above-mentioned cow dung recycling system after reprocessing: a manure washing pump is arranged between the cow house and the manure collection tank.

In the above-mentioned recycling system after cow dung reprocessing: the top of the anaerobic fermentation tank is provided with a biogas outlet.

The beneficial effects of the utility model are: the utility model separates the recovery of fermented biogas from feces and the utilization of biogas slurry, thereby increasing the utilization of biogas and greatly reducing the pollution of biogas, which meets the utilization standard of biogas slurry, and utilizes A large amount of biogas produced by manure heats and dries the solid residue in the process of manure recycling to prepare cattle bedding materials to achieve the purpose of recycling.

Description of drawings

Fig. 1 is the utility model not showing the structural representation of heating water tower;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is a schematic structural diagram of an anaerobic fermentation tank.

In the figure: 1. Cowshed, 2. Manure flushing pump, 4. Septic tank, 5. Partition, 6. Homogenizer tank, 7. Desulfurization tower, 8. Anaerobic fermentation tank, 81. Anaerobic fermentation tank inner wall interlayer, 82, hot water delivery pipe, 83, water outlet, 84, biogas outlet, 9, wet and dry separator, 10, biogas combustion chamber, 11, cow dung drying room, 12, cow dung conveying auger, 13. Cattle bedding material, 14. Exhaust heat pipe, 15. Heating water tower, 16. Biogas slurry tank.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model will be further described

As shown in Figures 1 to 3, the utility model provides a recycling system for cow dung after reprocessing. According to the cow dung treatment process, it sequentially includes a cowshed 1, a manure collection tank 4, a homogenization tank 6, and an anaerobic fermentation tank. 8. The dry-wet separator 9 and the cow dung drying room 11, the liquid separated by the dry-wet separator 9 flows to the biogas slurry tank 16, and the biogas slurry in the biogas slurry tank 16 is pumped to the farmland that needs to be irrigated, and the cow dung drying room 11 is connected with a heating source biogas combustion chamber 10, the biogas combustion chamber 10 is connected to the anaerobic fermentation tank 8 through a biogas delivery pipeline, a desulfurization tower 7 is arranged between the biogas combustion chamber 10 and the anaerobic fermentation tank 8, and the desulfurization tower 7 is used Iron oxide is used as a desulfurizer to desulfurize the biogas. The desulfurized biogas is respectively connected to the biogas combustion chamber 10 and the heating water tower 15 through the pipeline, and the heating water tower 15 is connected to the anaerobic fermentation tank 8. The delivery pipeline 82 is transported to the inner wall interlayer 81 of the anaerobic fermentation tank 8, which is used to maintain the temperature in the anaerobic fermentation tank 8, and a drain port 83 is arranged below the anaerobic fermentation tank 8, which can be used for water discharge, cow dung drying room Cow dung conveying auger 12 is arranged inside 11 for conveying cow dung. Cow dung drying chamber 11 is also provided with exhaust heat pipe 14 to the outside to prevent indoor danger due to high air temperature. The top of anaerobic fermentation tank 8 is provided with biogas Outlet 84, the biogas is piped to all points of use.

The working principle of the utility model is as follows: the cow feces produced in the cowshed 1 are gathered in the manure collection tank 4, and a manure washing pump 2 is arranged between the cow shed 1 and the manure collection tank 4, and the manure washing pump 2 will collect the manure The liquid feces in the pool 4 are pumped into the barn 1 to flush the excrement and flow back into the septic tank 4 to form a cycle. The septic tank 4 is also connected with the biogas slurry tank 16 pump to dilute the concentration in the septic tank 4. When the septic tank If the concentration in 4 is too high, the biogas slurry in the biogas slurry tank 16 will be pumped into the cesspool 4 for dilution. When the cow manure in the cesspool 4 reaches a certain amount, it will be pumped to the homogenization tank 6, and the manure will be collected. Between the pool 4 and the homogenization pool 6, there is a partition 5 for isolating long and thick fibers, and then fermented in the anaerobic fermentation tank 8, and the residue after fermentation is separated from the solid and liquid by the dry-wet separator 9, and the solid cow dung enters The cow dung drying chamber 11 is dry, and the heat source of the cow dung drying chamber 11 is produced by the biogas combustion produced by the anaerobic fermentation tank 8, and the biogas produced by the anaerobic fermentation tank 8 is firstly desulfurized by the desulfurization tower 7, and part of it is used in the biogas Combustion chamber 10 burns and dries cow dung, part of which is used to heat water to maintain the temperature in anaerobic fermentation tank 8 at low temperature, and finally passes through cow dung drying chamber 11 to dry and pulverize cow dung into a water content of about 30%. Cattle bedding material, the liquid separated by the dry-wet separator 9 flows to the biogas slurry tank 16, and the biogas slurry in the biogas slurry tank 16 is pumped to the farmland that needs to be irrigated.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, these Improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims (9)

1. A cow dung recycling system after reprocessing is characterized in that: according to the cow dung treatment process, it comprises successively cowshed (1), cesspool (4), homogenate tank (6), anaerobic fermentation tank (8 ), dry-wet separator (9) and cow dung drying chamber (11), described cow dung drying chamber (11) is connected with heating source biogas combustion chamber (10), and this biogas combustion chamber (10) passes biogas The delivery pipeline is connected to the anaerobic fermentation tank (8), and a desulfurization tower (7) is arranged between the biogas combustion chamber (10) and the anaerobic fermentation tank (8), and the dry-wet separator (9) separates The liquid flows to the biogas slurry tank (16), and the biogas slurry in the biogas slurry tank (16) is pumped to farmlands that need to be irrigated. 2. A system for recycling cow dung after reprocessing according to claim 1, characterized in that: the desulfurization tower (7) is connected to the biogas combustion chamber (10) and the heating water tower (15) through the biogas delivery pipeline respectively ). 3. the recycling system after a kind of cow dung reprocessing according to claim 2 is characterized in that: described heating water tower (15) links to each other with anaerobic fermentation tank (8), and hot water is passed through hot water delivery pipeline ( 82) Transport to the inner wall interlayer (81) of the anaerobic fermentation tank. 4. The recycling system after a kind of cow dung reprocessing according to claim 1 is characterized in that: between the described septic tank (4) and the homogenizer tank (6), there is also a device for isolating long thick fiber The slump (5). 5. A system for recycling cow dung after reprocessing according to claim 1, characterized in that: said septic tank (4) is connected to the biogas slurry tank (16) through a pump. 6. A system for recycling cow dung after reprocessing according to claim 1, characterized in that: the cow dung drying chamber (11) is provided with a cow dung conveying auger (12). 7. A system for recycling cow dung after reprocessing according to claim 6, characterized in that: said cow dung drying chamber (11) is also provided with a heat exhaust pipe (14). 8. A system for recycling cow dung after reprocessing according to claim 1, characterized in that: a manure flushing pump (2) is arranged between the cowshed (1) and the manure collection tank (4) . 9. A system for recycling cow dung after reprocessing according to claim 3, characterized in that: the top of the anaerobic fermentation tank (8) is provided with a biogas outlet (84).