CN104761104A - Pig farm manure retreated recycling utilization system - Google Patents

Abstract

The invention discloses a pig farm manure retreated recycling utilization system, which comprises a manure collection unit, a solid-liquid separation unit, an anaerobic fermentation unit, a biogas utilization unit and a biogas slurry utilization unit, wherein the manure collection unit comprises a collecting reservoir, a manure pit, a settling tank and a liquid storage tank, the solid-liquid separation unit consists of a solid-liquid separation machine and an organic fertilizer treatment device, the anaerobic fermentation unit is a multistage anaerobic reaction device and consists of a primary anaerobic reaction tank and a secondary anaerobic reaction tank, the biogas utilization unit consists of a biogas slurry storage tank, a forest irrigation device and a farmland irrigation device, and a plastic soft protection layer is arranged above the manure pit. According to the pig farm manure retreated recycling utilization system, not only can manure be fermented to produce biogas and biogas slurry, but also the solid and liquid separation can generate organic fertilizer, the secondary pollution possibility of the waste gas can be avoided, the waste can be effectively and fully reutilized, and the comprehensive utilization rate can be improved.

Description

Pig farm manure reprocessing resource recycling system

Technical field:

The invention relates to a manure utilization system, in particular to a pig farm manure reprocessing resource recycling system. By adopting solid-liquid separation and anaerobic fermentation technology, the manure water is firstly separated into dry manure and manure water, and then dried The manure is processed into organic fertilizer, and the manure is anaerobically fermented to produce biogas and biogas slurry. The biogas can be used to generate electricity, and the biogas slurry can be used to irrigate farmland and trees.

Background technique:

With the development of animal husbandry and the rapid increase of large-scale pig farms and pig breeding areas, the main problem brought about is the treatment of a large amount of fecal sewage and wastewater: due to the strong leaching of feces and urine, if not properly treated, It will enter the groundwater layer through surface runoff and infiltration, or accumulate in the soil, causing soil pollution. The surface runoff of pig farm manure and urine open-air dumps during the rainy season is the main way to cause surface water and groundwater pollution. Therefore, how to effectively deal with the excrement and urine of large-scale pig farms is a major problem to be solved urgently. If there is a way to effectively treat the manure and sewage produced by breeding and reuse the manure, it can save a lot of money for the breeding industry and improve the comprehensive utilization rate of manure.

Invention content:

The technical problem to be solved by the present invention is to provide a recycling system for pig farm manure reprocessing resources, which can not only produce biogas and biogas liquid through fermentation of manure water, but also produce organic fertilizer through solid-liquid separation, so that waste can be effectively Fully reuse and improve the comprehensive utilization rate.

The technical scheme that the present invention takes for solving technical problems is:

A pig farm manure reprocessing resource recycling system, comprising a manure collection unit, a solid-liquid separation unit, an anaerobic fermentation unit, a biogas utilization unit and a biogas slurry utilization unit, and the manure collection unit includes a liquid collection tank and a septic tank , a sedimentation tank and a liquid storage tank. After the feces and sewage discharged from the farm pass through the liquid collection tank, the waste liquid flows into the liquid storage tank after being precipitated in the sedimentation tank for use, and the solid manure and the solid manure filtered out of the liquid collection tank The solid manure deposited in the sedimentation tank is transported to the cesspool for use; the solid-liquid separation unit includes a solid-liquid separator and an organic fertilizer treatment device, and the solid manure in the cesspool is treated by the solid-liquid separator 1. The solid matter is processed by the organic fertilizer treatment device, and the liquid flows into the liquid storage tank; the anaerobic fermentation unit is a multi-stage anaerobic reaction device, including a primary anaerobic reaction tank and a secondary anaerobic reaction tank. The waste liquid in the liquid storage tank is lifted by the lifting pump and then enters the primary anaerobic reaction tank and the secondary anaerobic reaction tank; the biogas utilization unit includes a biogas cabinet, a water-sealed biogas purification tank and a biogas power generation device. The biogas produced in the first-stage anaerobic reaction tank and the second-stage anaerobic reaction tank enters the biogas tank through the gas collection pipe, and the biogas output from the biogas tank is purified by the water-sealed biogas purification tank and then input to the biogas power generation In the device; the biogas slurry utilization unit includes a biogas slurry storage pond and a forest irrigation device, and the biogas slurry produced in the first-stage anaerobic reaction tank and the secondary anaerobic reaction tank flows into the biogas slurry storage pond through the biogas slurry delivery pipeline Among them, according to needs, the biogas slurry in the biogas slurry storage tank flows into the forest irrigation device for recycling; the liquid storage tank and the biogas slurry storage tank are both installed underground; Plastic soft protective layer.

The liquid collection pool is a "convex" structure, which is made of concrete pouring. The lower part is a solid wall hollow structure. The upper half of the collection tank is irregularly provided with several waste liquid through holes, and the outer end of the collection tank is set There is a layer of filter screen, and the collection tank and the filter screen are connected by bolts, and the solid manure filtered out of the filter screen is transported to the septic tank for use; the top height of the collection tank is lower than that of the farm. The height of the slats for pig herds.

The sedimentation tank is composed of a small ring pool, a middle ring pool and a big ring pool; Several small through holes are irregularly arranged on the two small partitions; the middle ring pool is arranged in the inner cavity of the large ring pool, and four large partitions are evenly arranged between the middle ring pool and the large ring pool, and each large ring pool There are several large through-holes irregularly arranged on the partition; the positions of the four small partitions and the four large partitions are staggered and evenly arranged, and a small partition is provided at the position corresponding to the middle and lower part of every two large partitions , a large partition is arranged at a corresponding position above every two small partitions.

The water-sealed biogas purification tank includes a tank body, the lower end of the tank body is provided with a control valve and a water inlet pipe, and the upper end of the tank body is provided with an air intake pipe and an exhaust pipe; the lower end nozzle of the air intake pipe is located in the tank body Below the water surface, the lower end nozzle of the exhaust pipe is located above the water surface; a transparent water level gauge is provided on the outside of the tank body, and a pressure sensor is provided at the inner upper end, and the pressure sensor is connected to the controller and the alarm through a connection; The upper nozzle of the air intake pipe is connected with the gas outlet of the biogas cabinet, and the upper nozzle of the exhaust pipe is connected with the biogas power generation device; the exhaust pipe is provided with a check valve to prevent The discharged biogas returns to the tank body; the upper end of the transparent water level gauge is fixed on the upper end of the tank body through a fixing bracket.

The forestry irrigation device includes a liquid extraction pipeline, a liquid extraction pump, a main infusion pipe, a forestry irrigation branch infusion pipe and a farmland irrigation branch infusion pipe; the forestry irrigation branch infusion pipe is provided with a first control valve, and the farmland irrigation branch The infusion tube is provided with a second control valve.

According to needs, the multi-stage anaerobic reaction device can be equipped with three or more anaerobic reaction tanks to carry out multi-stage anaerobic fermentation reactions.

The present invention adopts solid-liquid separation technology and anaerobic fermentation technology to separate manure water into dry manure and manure water, and dry manure is processed into organic fertilizer, which can directly fertilize crops and trees, and manure water is anaerobic Fermentation produces biogas and biogas slurry. Biogas can be used to generate electricity and biogas slurry can be used to irrigate farmland and trees.

In the present invention, a high-temperature and oxidation-resistant plastic soft protective layer is arranged above the septic tank, which can effectively prevent waste gas from being discharged into the atmosphere and cause secondary pollution, which is in line with the enterprise development concept of environmental protection and pollution-free; Both the liquid pond and the biogas slurry storage pond are set underground to save space.

In the present invention, the liquid collection pool is designed as a "convex" structure, the upper part is a collection tank, and a layer of filter screen is arranged at the outer end of the collection tank, which can initially separate the wastewater from the farm and block the solid matter in the waste liquid Enter the liquid collection tank to improve the solid-liquid separation effect and reduce the treatment cost. The solid manure filtered out of the filter screen is transported to the septic tank, directly processed by the organic fertilizer treatment device, and then enters the reuse link.

In the sedimentation tank of the present invention, the small ring pool, the middle ring pool and the large ring pool are nested together to reduce the occupied area, and the sewage flows along the circumferential direction, and performs circular flow between different cavities through the through holes of the partitions , increase the flow path, slow down the flow velocity, and improve the sedimentation effect.

The invention is provided with a water-sealed biogas purification pressure tank device, which uses the water in the pressure tank to filter the biogas, removes impurities in the biogas, purifies the gas, and improves the combustion value; and the exhaust pipe is provided with a non-return The valve makes the biogas flow in one direction and improves the safety performance of use.

The forestry irrigation device of the present invention comprises a liquid extraction pipeline, a liquid extraction pump, a main infusion pipe, a branch infusion pipe for forestry irrigation and a branch infusion pipe for farmland irrigation. A first control valve is arranged on the branch infusion pipe for forestry irrigation. The pipe is provided with a second control valve, through which the speed and flow of water can be controlled to improve the irrigation efficiency of the forest field.

The difference between the manure comprehensive utilization system of the present invention and the general wastewater treatment system is that not only the manure water is fermented to produce biogas, but also undergoes solid-liquid separation to produce organic fertilizer, and avoids the secondary pollution of waste gas Possibility, so that the waste can be effectively and fully reused, and the comprehensive utilization rate can be improved.

The positive beneficial effects of the present invention are as follows:

1. In the present invention, the solid is made into organic fertilizer, the biogas is used to generate electricity, and the biogas slurry is used to irrigate farmland and trees, so that the waste can be effectively and fully reused, and the comprehensive utilization rate is improved.

2. The present invention fundamentally solves the problem of manure water treatment in large-scale aquaculture, and realizes the maximization and rationalization of clean production and waste utilization.

3. The present invention avoids the possibility of secondary pollution caused by exhaust gas, conforms to the production concept of environmental protection and pollution-free, and is worthy of popularization.

4. The present invention includes multiple processes, which can effectively treat the waste from pig farms without polluting the surrounding environment, turn waste into treasure, and improve the economic benefits of pig farms.

Description of drawings:

Fig. 1 is the structural principle schematic diagram of the present invention;

Fig. 2 is the schematic diagram of the enlarged structure of the liquid collection tank in Fig. 1;

Fig. 3 is the enlarged schematic diagram of the sedimentation tank in Fig. 1;

Fig. 4 is a schematic diagram of the enlarged structure of the water-sealed biogas purification pressure tank in Fig. 1;

Fig. 5 is a schematic diagram showing an enlarged structure of the forest irrigation device in Fig. 1 .

Detailed ways:

Below in conjunction with accompanying drawing, the present invention will be further explained and illustrated:

See Figure 1, Figure 2, Figure 3, Figure 4 and Figure 5, a pig farm manure reprocessing resource recycling system, including manure collection unit, solid-liquid separation unit, anaerobic fermentation unit, biogas utilization unit and biogas slurry Utilization unit; the manure collection unit includes a liquid collection tank 2, a septic tank 3, a sedimentation tank 4 and a liquid storage tank 5. After the feces and sewage 1 discharged from the farm pass through the liquid collection tank 2, the waste liquid passes through the sedimentation tank 4 after sedimentation Flow into the liquid storage tank 5 for use, and the solid manure filtered out by the liquid collection tank 2 and the solid manure deposited in the sedimentation tank 4 are transported to the septic tank 3 for use; the solid-liquid separation unit includes a solid-liquid separator 6 and Organic fertilizer processing device 7, solid manure in cesspool 3 is processed by solid-liquid separator 6, solid matter is processed by organic fertilizer processing device 7, and liquid flows into liquid storage tank 5; anaerobic fermentation unit is multi-stage The anaerobic reaction device includes a primary anaerobic reaction tank 9 and a secondary anaerobic reaction tank 10. The waste liquid in the liquid storage tank 5 is lifted by the lift pump 8 and then enters the primary anaerobic reaction tank 9 and the secondary anaerobic reaction tank. In the oxygen reaction tank 10; the biogas utilization unit includes a biogas cabinet 12, a water-sealed biogas purification pressure tank 13 and a biogas power generation device 14, and the biogas produced in the primary anaerobic reaction tank 9 and the secondary anaerobic reaction tank 10 is collected The gas pipeline 11 enters the biogas tank 12, and the biogas output from the biogas tank 12 is purified by the water-sealed biogas purification pressure tank 13 and then input into the biogas power generation device 14; the biogas slurry utilization unit includes a biogas slurry storage pond 16 and a forest field The irrigation device 17, the biogas slurry produced in the primary anaerobic reaction tank 9 and the secondary anaerobic reaction tank 10 flows into the biogas slurry storage tank 16 through the biogas slurry delivery pipeline 15, and the biogas slurry in the biogas slurry storage tank 16 Flow into the forest field irrigation device 17 for recycling; wherein: the liquid storage tank 5 and the biogas slurry storage tank 16 are all arranged underground, and a high-temperature and oxidation-resistant plastic soft protective layer is arranged above the septic tank 3 .

The liquid collection tank 2 is a "convex" structure, which is formed by pouring concrete. The lower part is a solid wall hollow structure. The upper part of the collection tank 18 is irregularly provided with a number of waste liquid through holes. A layer of filter screen 19 is provided, and the collection tank 18 is connected with the filter screen 19 by bolts 20. The solid manure filtered out of the filter screen 19 is transported to the septic tank 3 for use. The height of the top of the collection tank 18 is lower than The height of the manure slab for pigs in the farm.

Settling tank 4 is made up of small ring pool 21, middle ring pool 22 and big ring pool 23, and small ring pool 21 is arranged in the inner cavity of middle ring pool 22, and four small compartments are evenly arranged between small ring pool 21 and middle ring pool 22 plate 25, several small through holes are irregularly arranged on each small partition 25; the middle ring pool 22 is arranged in the inner cavity of the large ring pool 23, and four large ring pools are evenly arranged between the middle ring pool 22 and the large ring pool 23. The partitions 24, each large partition 24 is irregularly provided with several large through-holes; the positions of the four small partitions 25 and the four large partitions 24 are staggered from each other and arranged evenly, corresponding to the bottom of each two large partitions. A small partition is arranged at the position of each two small partitions, and a large partition is arranged at a corresponding position above every two small partitions.

The water-sealed biogas purification pressure tank 13 includes a tank body 29, the lower end of the tank body 29 is provided with a control valve 30 and a water inlet pipe 31, and the upper end of the tank body 29 is provided with an air intake pipe 26 and an exhaust pipe 27; the lower end of the air intake pipe 26 is located at Below the water surface in the tank body 29, the lower end nozzle of the exhaust pipe 27 is located above the water surface; a transparent water level gauge 33 is arranged on the outside of the tank body 29, and a pressure sensor 34 is arranged on the inner upper end, and the pressure sensor 34 is connected with the controller and the alarm by connecting wires. The upper nozzle of the intake pipe 26 is connected with the gas outlet of the biogas tank 12, and the upper nozzle of the exhaust pipe 27 is connected with the biogas generator 14; a check valve 28 is arranged on the exhaust pipe 27 to prevent The discharged biogas flows back into the tank body 29 ; the upper end of the transparent water level gauge 33 is fixed on the upper end of the tank body 29 through the fixing frame 32 .

The forest field irrigation device 17 comprises a liquid extraction pipeline 35, a liquid extraction pump 36, a main infusion pipe 37, a forestry irrigation branch infusion pipe 38 and a farmland irrigation branch infusion pipe 40; a first control valve 39 is arranged on the forestry irrigation branch infusion pipe 38, A second control valve 41 is provided on the farmland irrigation branch infusion pipe 40 .

According to needs, the multi-stage anaerobic reaction device can be equipped with three or more anaerobic reaction tanks to carry out multi-stage anaerobic fermentation reactions.

The present invention not only ferments manure water to produce biogas and biogas liquid, but also undergoes solid-liquid separation to produce organic fertilizer, and avoids the possibility of secondary pollution caused by waste gas, so that waste can be effectively and fully reused, and comprehensive utilization rate.

Claims (6)

1. A pig farm manure reprocessing resource recycling system, comprising a manure collection unit, a solid-liquid separation unit, an anaerobic fermentation unit, a biogas utilization unit and a biogas slurry utilization unit, characterized in that: the manure collection unit includes a set Liquid pool (2), septic tank (3), sedimentation tank (4) and liquid storage tank (5), after the feces and sewage (1) discharged from the farm pass through the liquid collection tank (2), the waste After being settled in the sedimentation tank (4), the liquid flows into the liquid storage tank (5) for use, and the solid manure filtered by the liquid collection tank (2) and the solid manure deposited in the sedimentation tank (4) are transported to the septic tank ( 3) for use; the solid-liquid separation unit includes a solid-liquid separator (6) and an organic fertilizer treatment device (7), and the solid manure in the cesspool (3) is treated by the solid-liquid separator (6) Finally, the solid matter is processed by the organic fertilizer treatment device (7), and the liquid flows into the liquid storage tank (5); the anaerobic fermentation unit is a multi-stage anaerobic reaction device, including a first-stage anaerobic reaction tank (9) and the secondary anaerobic reaction tank (10), the waste liquid in the liquid storage tank (5) is lifted by the lift pump (8) and then enters the primary anaerobic reaction tank (9) and the secondary anaerobic reaction tank (10); the biogas utilization unit includes a biogas cabinet (12), a water-sealed biogas purification pressure tank (13) and a biogas power generation device (14), the primary anaerobic reaction tank (9) and the secondary anaerobic The biogas produced in the oxygen reaction tank (10) enters the biogas cabinet (12) through the gas collection pipe (11), and the biogas output from the biogas cabinet (12) is purified by a water-sealed biogas purification pressure tank (13) After that, it is input into the biogas power generation device (14); the biogas slurry utilization unit includes a biogas slurry storage tank (16) and a forest irrigation device (17), the primary anaerobic reaction tank (9) and the secondary anaerobic reaction tank The biogas slurry produced in the tank (10) flows into the biogas slurry storage tank (16) through the biogas slurry delivery pipeline (15), and the biogas slurry of the biogas slurry storage tank (16) flows into the forest irrigation device (17) as required The liquid storage tank (5) and the biogas slurry storage tank (16) are both arranged underground; the top of the septic tank (3) is provided with a high-temperature and oxidation-resistant plastic soft protective layer. 2. The pig farm manure reprocessing resource recycling system according to claim 1, characterized in that: the liquid collection pool (2) is a "convex" structure made of concrete, and the lower part is a solid wall Hollow structure, the collection tank (18) in the upper part is irregularly provided with several waste liquid through holes, and a layer of filter screen (19) is arranged at the outer end of the collection tank (18), the collection tank (18) and the filter The nets (19) are connected by bolts (20), and the solid manure filtered out of the filter net (19) is transported to the septic tank (3) for use; the top height of the collection tank (18) is It is lower than the height of the pigs in the farm. 3. The pig farm manure reprocessing resource recycling system according to claim 1, characterized in that: the sedimentation tank (4) consists of a small ring pool (21), a middle ring pool (22) and a large ring pool (23 ) composition; the small ring pool (21) is set in the inner cavity of the middle ring pool (22), and four small partitions (25) are uniformly arranged between the small ring pool (21) and the middle ring pool (22) , each small partition (25) is irregularly provided with several small through-holes; Four large partitions (24) are evenly arranged between the pools (23), and several large through holes are irregularly arranged on each large partition (24); the four small partitions (25) and the four large partitions The positions of the partitions (24) are staggered from each other and arranged evenly. A small partition is provided at the position corresponding to the middle of every two large partitions, and a large partition is provided at the position corresponding to the top of every two small partitions. 4. The pig farm manure reprocessing resource recycling system according to claim 1, characterized in that: the water-sealed biogas purification pressure tank (13) includes a tank body (29), and the tank body (29) The lower end is provided with a control valve (30) and a water inlet pipe (31), and the upper end of the tank (29) is provided with an air inlet pipe (26) and an exhaust pipe (27); the lower end of the air inlet pipe (26) is located at Below the water surface in the tank body (29), the lower end nozzle of the exhaust pipe (27) is located above the water surface; a transparent water level gauge (33) is provided on the outside of the tank body (29), and a pressure sensor ( 34), the pressure sensor (34) is connected to the controller and the alarm through a wire; the upper nozzle of the inlet pipe (26) is connected to the gas outlet of the biogas cabinet (12), and the exhaust The upper nozzle of the pipe (27) is connected with the biogas power generation device (14); the exhaust pipe (27) is provided with a check valve (28) to prevent the discharged biogas from flowing back into the tank (29) Inside; the upper end of the transparent water level gauge (33) is fixed on the upper end of the tank body (29) through a fixing bracket (32). 5. The pig farm manure reprocessing resource recycling system according to claim 1, characterized in that: the forest field irrigation device (17) includes a liquid extraction pipeline (35), a liquid extraction pump (36), a main infusion pipe (37), forestry irrigation branch infusion pipe (38) and farmland irrigation branch infusion pipe (40); the forestry irrigation branch infusion pipe (38) is provided with a first control valve (39), and the farmland irrigation branch infusion pipe (40) is provided with a second control valve (41). 6. The pig farm manure reprocessing resource recycling system according to claim 1, characterized in that: as required, the multi-stage anaerobic reaction device can be provided with three or more anaerobic reaction tanks for multi-stage Anaerobic fermentation reaction.