CN216513341U

CN216513341U - Modernized plant wastewater recycling system

Info

Publication number: CN216513341U
Application number: CN202122990580.1U
Authority: CN
Inventors: 贾龙
Original assignee: Beijing Zhinonggu Technology Co ltd; Beijing Dabeinong Technology Group Co Ltd
Current assignee: Beijing Zhinonggu Technology Co ltd; Beijing Dabeinong Biotechnology Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-05-13
Anticipated expiration: 2031-12-01

Abstract

The utility model provides a modern livestock farm wastewater recycling system which comprises an excrement fermentation treatment unit, a biogas boiler, a high-pressure flushing device, a terminal flushing device and a transition water tank, wherein the excrement fermentation treatment unit collects excrement sewage, ferments the collected excrement sewage to obtain biogas and sewage to be disinfected, the obtained biogas is communicated with a gas inlet of the biogas boiler through a pipeline, the sewage to be disinfected enters the biogas boiler through the pipeline to be disinfected at high temperature, a water outlet of the biogas boiler is communicated with the high-pressure flushing device and the transition water tank through the pipeline, the high-pressure flushing device is communicated with the terminal flushing device through the pipeline, and the transition water tank is communicated with the high-pressure flushing device through the pipeline. The utility model utilizes the biogas generated by anaerobic fermentation of the fecal sewage of the farm, and thoroughly disinfects and recycles the wastewater separated after the advanced treatment of the anaerobic fermentation of the pig farm sewage in a heating mode at high temperature, thereby not only reducing the sewage discharge of the pig farm, but also solving the biogas discharge problem of the pig farm.

Description

Modernized plant wastewater recycling system

Technical Field

The utility model belongs to the technical field of aquaculture wastewater treatment, and particularly relates to a wastewater recycling system for a modern farm.

Background

China is the biggest pig raising country in the world, 50% of stock pigs in the world are raised in China, and with the rise of the pig raising industry, large-scale pig farms are more and more, and the pig farms are also larger. The environmental protection of pig farms is currently a serious problem facing large companies. The pig farm sewage mainly comprises pig urine, pig manure and pigsty washing water. At present, sewage treatment of a pig farm mainly comprises standard discharge, agriculture and animal husbandry combination and the like. Due to the fact that African swine fever is subjected to grave, most of large-scale pig farms are generally located in remote mountain areas, and sewage of the pig farms is generally discharged after reaching standards. Under the influence of treatment cost, the standard of standard discharge of the sewage of the pig farm mainly comprises the discharge standard of pollutants for livestock and poultry breeding industry and the water quality standard of farmland irrigation, and the treated sewage still needs to be discharged into rural fields matched with the breeding farm and cannot be directly discharged into the external environment. However, the land available for digestion in the southern mountainous region is limited, and the sewage discharge requirement of a pig farm cannot be met, particularly in karst terrain regions such as Yunobu regions. Therefore, how to discharge the treated sewage becomes a general problem in various large pig raising places.

The sewage treatment system generates a large amount of biogas in the early anaerobic fermentation process, and the treatment approaches of the biogas mainly comprise power generation, boiler heating, direct combustion and the like at present. The biogas power generation needs to invest a large amount of cost to purchase a biogas generator, biogas purification, biogas pressurization equipment and the like, which not only leads to the greatly improved cost of the pig farm sewage treatment system, but also leads to the low utilization efficiency of the later stage biogas power generation equipment in the later stage pig farm operation process because most modern pig farms are automated equipment and have higher requirements on the stability of electric power. The biogas power generation equipment is generally idle at a later stage. At present, biogas heating can only be used in winter, heating is not needed in a pig farm in summer, sewage treatment equipment produces the largest gas in summer, and particularly in south areas, because the winter is shorter, the utilization efficiency of the biogas heating is not high. The direct combustion of the biogas not only causes a great deal of waste, but also causes a great deal of pollution and the like if the combustion is insufficient.

The Chinese patent application CN109205931A, a method for treating and recycling wastewater from pig farms, in the prior art, has the technical scheme that the wastewater from pig farms is subjected to anaerobic treatment and advanced wastewater treatment, and is disinfected by a disinfectant, and then the wastewater is recycled, but for diseases abused by the pig farms at present, particularly African swine fever, DNA viruses are contained, and the virus in the wastewater is hardly thoroughly destroyed by disinfecting the recovered wastewater by the disinfectant, so that the biological safety of the pig farms cannot be ensured. The breeding farm produces a large amount of biogas in the early sewage treatment process, and the biogas is not effectively utilized at present, so that a large amount of energy is wasted, and air is polluted.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a wastewater recycling system for a modern farm.

In order to achieve the purpose, the utility model adopts the following technical scheme that:

the utility model provides a modernized plant waste water recycle system, it includes excrement and urine fermentation processing unit, the biogas boiler, high pressure flushing device, terminal flushing device and transition water tank, excrement and urine fermentation processing unit collects the marsh gas that obtains of fermentation after the processing with excrement and urine sewage and the sewage of treating the disinfection, the marsh gas export of excrement and urine fermentation processing unit heats through the gas entry of pipeline intercommunication biogas boiler, the sewage of treating the disinfection with excrement and urine fermentation processing unit is used for the heating disinfection through pipeline intercommunication biogas boiler, the delivery port of biogas boiler communicates high pressure flushing device and transition water tank respectively through the pipeline, high pressure flushing device communicates terminal flushing device through the pipeline, the transition water tank passes through pipeline intercommunication high pressure flushing device.

The system for recycling wastewater of the modern farm as described above preferably comprises a transfer tank, a solid-liquid separator, a UASB anaerobic fermentation tank, a biogas tank, a coagulation flocculation treatment tank, a wastewater tank to be disinfected and a wastewater discharge tank, wherein the transfer tank is provided with the solid-liquid separator which carries out solid-liquid separation on wastewater and then conveys the liquid into the UASB anaerobic fermentation tank, an upper outlet of the UASB anaerobic fermentation tank is communicated with an inlet of the biogas tank, and the biogas tank is communicated with a biogas boiler through a pipeline; the lower extreme of UASB anaerobic fermentation jar sends into liquid through the pipeline and thoughtlessly congeals in the flocculation treatment pond, thoughtlessly congeals the flocculation treatment pond and passes through the pipeline intercommunication and wait to disinfect the effluent water sump, waits to disinfect the effluent water sump and passes through pipeline intercommunication biogas boiler, thoughtlessly congeals the flocculation treatment pond and passes through pipeline intercommunication and discharge the effluent water sump, discharges the effluent water sump and locates the below of thoughtlessly congealing the flocculation treatment pond.

In the wastewater recycling system for the modern farm as described above, a desulfurization/dehydration processor is preferably disposed between the biogas tank and the biogas boiler.

As above-mentioned modernized plant waste water recycle system, preferably, fecal fermentation processing unit is still including two-stage A/O fermentation treatment pond, two-stage A/O fermentation treatment pond is located between UASB anaerobic fermentation jar and the flocculation treatment pond of coagulating, and two-stage A/O fermentation treatment pond passes through the pipeline and communicates UASB anaerobic fermentation jar and flocculation treatment pond of coagulating respectively. Furthermore, a water outlet of the UASB anaerobic fermentation tank is communicated with a water inlet of the two-stage A/O fermentation treatment tank, and a water outlet of the two-stage A/O fermentation treatment tank is communicated with a water inlet of the coagulation flocculation treatment tank.

According to the wastewater recycling system for the modern farm, preferably, the wastewater recycling system for the modern farm further comprises a farm water tank, and the farm water tank is communicated with the transition water tank through a pipeline to supply water to the transition water tank.

According to the modern livestock farm wastewater recycling system, preferably, the tonnage of the biogas boiler needs to heat the recycled water to 85 ℃ or above for 10 min.

In the wastewater recycling system of the modern farm as described above, preferably, the pipe and the interface sealing member of the high-pressure flushing device are made of corrosion-resistant materials.

The utility model has the beneficial effects that:

according to the system for recycling the wastewater of the modern farm, biogas generated by anaerobic fermentation of the fecal sewage of the farm is utilized, and wastewater separated after anaerobic fermentation of the fecal sewage of the farm and the like is thoroughly sterilized at high temperature and then recycled. Therefore, sewage discharge of the farm can be reduced, and the problem of biogas discharge of the farm can be solved. The sewage of pig farms such as the sewage mainly used breed the dormitory ground washing, the trough is washed, the vehicle washs adopts the marsh gas heating that plant sewage treatment produced, after the high temperature disinfection, be used for the washing of plant vehicle, the colony house, road, realize the recycle of plant sewage, reduce sewage discharge, mainly used southwest mountain area does not have the sewage treatment of the scale plant of supporting land used of disappearing, the emission that has reduced sewage has reduced waste gas again so promptly.

The modernized farm wastewater recycling system provided by the utility model is used for wastewater treatment and recycling of a large-scale pig farm, and has the following advantages:

1. the method can recycle about 60 tons of sewage every day, which accounts for about 30 percent of sewage amount of a pig farm, and can greatly reduce sewage discharge and later-period absorption pressure.

2. The generated methane is fully utilized, the methane is completely recycled, the emission of waste gas is greatly reduced, and carbon neutralization in China is facilitated.

3. The volume and the cost of the sewage storage tank at the later stage are reduced.

4. Can reduce the water consumption of a pig farm, save water resources and save about 60 tons of water each day.

5. The sewage recovery and the high-pressure washing are combined for the first time, only a pipeline from the sewage transfer tank to the high-pressure washing needs to be added, the length of the pipeline is relatively small, and the manufacturing cost is relatively low. The sewage treatment system and the high-pressure flushing system of the pig farm are basically standard-matched of the pig farm, and other hardware equipment is not required to be added.

6. The pig farm sewage recovery research is many before, but most of the pig farm sewage is disinfected by chemical reagents and then reused, and the utility model realizes the sewage recovery and utilization by adopting a high-temperature disinfection mode for the first time at home and abroad.

7. The high-temperature disinfection reclaimed water is absolutely safe, the tail end of a water outlet can still keep the high temperature of about 60 ℃, objects to be cleaned, such as vehicles, the ground, a trough and the like, have a certain antivirus effect, and can kill bacteria and viruses in partial environment to a certain degree.

8. The high temperature at the tail end of the recovered water is more beneficial to washing the ground, vehicles and the like, and the labor intensity is reduced.

Drawings

FIG. 1 is a schematic diagram of a preferred system of the present invention.

FIG. 2 is a schematic flow chart of a 5000-head sow farm sewage recycling system during operation.

Detailed Description

The following examples are intended to further illustrate the utility model but should not be construed as limiting it. Modifications and substitutions may be made thereto without departing from the spirit and scope of the utility model.

Example 1

A modernized plant waste water recycle system includes: excrement and urine fermentation processing unit, biogas boiler 1, high pressure flushing device 2, terminal flushing device 3, transition water tank 4, excrement and urine fermentation processing unit collects the marsh gas and a part sewage that obtains after handling with excrement and urine sewage and carries out disinfection treatment, let in biogas boiler with marsh gas through the biogas pipeline and heat, get into biogas boiler 1 with a part sewage that treats disinfection and heat the disinfection back, through pipeline intercommunication high pressure flushing device 2 and transition water tank 4, transition water tank 4 is used for boiler water cooling, functions such as supplementary boiler water, high pressure flushing device communicates terminal flushing device through the pipeline.

The outer side of the transition water tank 4 is also provided with a pig farm water tank 5, and the pig farm water tank 5 is used for supplementing water when the water is insufficient in winter.

The excrement fermentation treatment unit comprises a transfer tank 6, a solid-liquid separator, a UASB anaerobic fermentation tank 7, a methane tank 8, a coagulation flocculation treatment tank 9, a sewage tank 10 to be disinfected and a sewage discharge tank 11, wherein the transfer tank 6 is communicated with a sewage area through a pump and is provided with the solid-liquid separator, the transfer tank 6 conveys liquid into the UASB anaerobic fermentation tank 7 through the solid-liquid separator, the solid-liquid separator separates out solids, and the separated solids can be directly stacked and then used as fertilizer. An air outlet at the upper end of the UASB anaerobic fermentation tank 7 is communicated with an inlet of a biogas cabinet 8, the biogas cabinet is communicated with a desulfurization/dehydration processor 12, and the desulfurization/dehydration processor is communicated with a biogas boiler through a pipeline. The below of UASB anaerobic fermentation tank 7 is established and is thoughtlessly congealed flocculation treatment pond 9, liquid pump is gone into with liquid pump after the processing and is thoughtlessly congealed the flocculation treatment pond, it has the flocculating agent to add in the flocculation treatment pond to congeal, after flocculating liquid, send into the sewage pool 10 of waiting to disinfect with liquid partly through pipeline and pump, wait to disinfect the sewage pool 10 and communicate biogas boiler 1 through the pipeline, the below of coagulating flocculation treatment pond 9 still is equipped with discharges the effluent water sump 11, accessible pipeline intercommunication, it can be used to irrigate the emission to discharge the sewage after 11 will handle in the discharge effluent water sump. A two-stage A/O fermentation treatment tank can be arranged between the UASB anaerobic fermentation tank 7 and the coagulation flocculation treatment tank 9, the water outlet of the UASB anaerobic fermentation tank is communicated with the water inlet of the two-stage A/O fermentation treatment tank, the water outlet of the two-stage A/O fermentation treatment tank is communicated with the water inlet of the coagulation flocculation treatment tank, the liquid after fermentation treatment of the UASB anaerobic fermentation tank 7 enters the two-stage A/O fermentation treatment tank through a pump, and the liquid after fermentation treatment of the two-stage A/O fermentation treatment enters the coagulation flocculation treatment tank 9 through the pump for flocculation sedimentation.

The specific design can be carried out according to the needs, taking 5000-head sow farms as an example, the sewage is generated by about 200 tons each day, wherein about 30% of the sewage is expected to be recycled, and 60 tons of transition water tanks or buffer tanks for recycling the sewage are designed. 1200m produced in a pig farm every day³The biogas can heat 60 tons of sewage (every day) to 85 ℃ for 10min, and most of bacteria and viruses including African swine fever viruses in the sewage can be completely killed at 85 ℃ for 10min, so that the biological safety of a pig farm is ensured. The high-temperature sterilized recovered water is conveyed to high-pressure flushing equipment through a pipeline, and a pig farm water tank is designed at the high-pressure flushing equipment to clean the high-temperature sterilized recovered waterAnd water is introduced, and when the gas production in winter is too low and the recovered sewage is not heated enough, tap water is used for cleaning the pig farm. The high-pressure flushing equipment conveys the recovered sewage to the terminal flushing equipment for cleaning the ground, roads, vehicles, manger water and the like of the pigsty. Wherein the selection of the biogas boiler comprises the following steps: the tonnage of the biogas boiler needs to be selected to heat the recovered water to 85 ℃, and the temperature is kept for 10 min. Selecting the type of the high-pressure flushing equipment: the treated sewage still has higher COD and oxidant concentration, and the selection of high pressure flushing equipment pipeline and interface sealing member need corrosion resistant material.

The flow schematic diagram of the wastewater recycling system for the modern farm provided by the utility model for the 5000-head sow farm sewage recycling system is shown in fig. 2, excrement and sewage (about 200 cubic meters are generated every day) generated by a piggery are sent into a transfer pool through a piggery sewage discharge pipeline, liquid obtained by the excrement in the transfer pool after passing through a solid-liquid separator is sent into a UASB anaerobic fermentation tank for fermentation to generate biogas, the generated biogas enters a biogas cabinet for biogas collection, and the biogas entering the biogas cabinet is subjected to desulfurization/dehydration treatment to obtain clean biogas for use as biogas supplied to a biogas boiler. The sewage treated by the UASB anaerobic fermentation tank enters a two-stage A/O fermentation treatment tank, the sewage subjected to anaerobic and aerobic two-stage A/O fermentation enters a coagulation flocculation treatment tank for advanced treatment, then part of the sewage is subjected to disinfection treatment, the sewage is discharged into a sewage tank to be disinfected, the sewage is recovered by a pump from the sewage tank to be disinfected and then enters a methane boiler for heating at 85 ℃, the disinfection treatment is kept for 10min, and the obtained recovered water can be used as water for high-pressure washing of equipment such as a main machine or the like or stored in a transition water tank. And discharging the other part of sewage treated by the coagulation flocculation treatment tank into a discharge sewage tank (1.8 kilometers, which can be used for sewage treatment capacity of 4-6 months) for discharging.

For a pig farm with the breeding scale of 5000 sows, about 200 tons of sewage are produced every day, and by adopting the system disclosed by the utility model, about 60 tons of sewage can be recovered every day, which accounts for about 30% of the sewage amount of the pig farm, so that the discharge of the sewage and the later consumption pressure can be greatly reduced. And the generated methane is fully utilized, the methane is completely recycled, the emission of waste gas is greatly reduced, and carbon neutralization in China is facilitated. The volume and the cost of the sewage storage tank at the later stage are reduced. The treated sewage is generally stored for 4 months, the nutrient requirements of crops are met, the sewage pool is about 2.4 ten thousand cubic meters in 5000-head sow farms, and if the sewage is reduced by 30% every day, only 1.68 ten thousand cubic meters are needed in the follow-up process. In karst terrain areas such as Yunobu, the cost is high because the local soil is less, the biogas slurry pool can only use a cement pool, the cost of the pool is about 600 ten thousand yuan per 2.4 ten thousand cubic meters, the biogas slurry pool can be reduced by 30 percent after sewage recovery, and the cost is reduced by about 200 ten thousand yuan per.

The utility model combines the sewage recovery and the high-pressure flushing for the first time, and only needs to add a transition water tank and a pipeline to the high-pressure flushing equipment on the basis of the original piggery equipment, so the cost is lower. The sewage treatment system and the high-pressure flushing system of the pig farm are basically standard fittings of the pig farm, other hardware equipment is not needed to be added, the absolute biological safety of the sewage is realized after the sewage is disinfected by adopting a high-temperature mode for the first time, the high temperature is the best disinfection mode of the pig farm at present, the high-temperature disinfection recovered water is not only absolute safety, but also the tail end of a water outlet can still keep the high temperature of about 60 ℃, objects are cleaned to a certain extent, such as vehicles, the ground, a trough and the like have certain antivirus effect, bacteria and viruses in partial environment can be killed to a certain extent, the recycling of the methane and the sewage is realized, the biological safety is also ensured, and the production cost is also greatly reduced.

Claims

1. The utility model provides a modernized plant waste water recycle system, a serial communication port, it includes excrement and urine fermentation processing unit, the biogas boiler, high pressure flushing device, terminal flushing device and transition water tank, excrement and urine fermentation processing unit collects the marsh gas that obtains of fermentation after the processing with excrement and urine sewage and the sewage of treating the disinfection, the marsh gas export of excrement and urine fermentation processing unit is used for heating through the gas entry of biogas boiler of biogas pipeline intercommunication, the sewage of treating the disinfection of excrement and urine fermentation processing unit gets into the biogas boiler through the pipeline and heats the disinfection, the delivery port of biogas boiler communicates high pressure flushing device and transition water tank respectively through the pipeline, high pressure flushing device communicates terminal flushing device through the pipeline, the transition water tank communicates high pressure flushing device through the pipeline.

2. The wastewater recycling system according to claim 1, wherein the fecal fermentation treatment unit comprises a transfer tank, a solid-liquid separator, a UASB anaerobic fermentation tank, a biogas tank, a coagulation flocculation treatment tank, a to-be-disinfected sewage tank and a discharge sewage tank, wherein the transfer tank is provided with the solid-liquid separator, the solid-liquid separator carries out solid-liquid separation on sewage and then conveys liquid into the UASB anaerobic fermentation tank, an upper end gas outlet of the UASB anaerobic fermentation tank is communicated with an inlet of the biogas tank, and the biogas tank is communicated with a biogas boiler through a pipeline; the lower extreme of UASB anaerobic fermentation jar will be sent into liquid through the pipeline and thoughtlessly congeal in the flocculation treatment pond, thoughtlessly congeal the flocculation treatment pond and will communicate through the pipeline and wait to disinfect the effluent water sump, wait to disinfect the effluent water sump and pass through pipeline intercommunication biogas boiler, thoughtlessly congeal the flocculation treatment pond and pass through pipeline intercommunication and discharge the effluent water sump, discharge the effluent water sump and locate the below of thoughtlessly congealing the flocculation treatment pond.

3. The wastewater recycling system according to claim 2, wherein a desulfurization/dehydration treatment unit is provided between the biogas tank and the biogas boiler.

4. The wastewater recycling system according to claim 2, wherein the fecal fermentation treatment unit further comprises a two-stage A/O fermentation treatment tank, the two-stage A/O fermentation treatment tank is arranged between the UASB anaerobic fermentation tank and the coagulation flocculation treatment tank, and the two-stage A/O fermentation treatment tank is communicated with the UASB anaerobic fermentation tank and the coagulation flocculation treatment tank through pipelines respectively.

5. The wastewater recycling system according to claim 1, wherein the modern farm wastewater recycling system further comprises a farm water tank which is communicated with the transition water tank through a pipeline and is used for supplying water to the transition water tank.

6. The wastewater recycling system of claim 1, wherein the tonnage of the biogas boiler requires heating the recycled water to 85 ℃ or above for 10 min.

7. The wastewater recycling system of claim 1, wherein the piping and interface seals of the high pressure flush device are corrosion resistant materials.