CN215388646U - Excrement high ammonia recovery system - Google Patents
Excrement high ammonia recovery system Download PDFInfo
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- CN215388646U CN215388646U CN202120364076.8U CN202120364076U CN215388646U CN 215388646 U CN215388646 U CN 215388646U CN 202120364076 U CN202120364076 U CN 202120364076U CN 215388646 U CN215388646 U CN 215388646U
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Abstract
The utility model provides a high ammonia recovery system for excrement, and belongs to the technical field of ammonia recovery. The recovery and recovery system comprises a spraying unit, a circulating unit, an acid adding unit, a precipitation unit, an alkali adding unit and a recovery unit; this recovery system carries out deodorization and absorbs the ammonia in the waste gas through spraying the unit to waste gas, and the rethread deposits the unit and realizes the recovery to nitrogen, phosphorus, not only carries out high-efficient deodorization ammonia to the waste gas that the fermentation produced, reduces air pollution, still to phosphoric acid, ammonia recycle, generates high-efficient slowly-releasing fertilizer, reduces the deodorization cost, improves economic benefits greatly.
Description
Technical Field
The utility model belongs to the technical field of ammonia recovery, and relates to a high ammonia recovery system for excrement.
Background
Composting is a common treatment mode of chicken manure, a large amount of gas is discharged in the composting process to cause nutrient loss, the loss amount of nitrogen in the traditional aerobic composting process is about 16-76% of the initial total nitrogen, the contribution rate of ammonia volatilization to nitrogen loss can reach 40-80%, and NH (ammonia) content can reach 40-80%3Is the main form of nitrogen loss during composting. And NH3After being discharged to the atmosphere, the wastewater undergoes a series of reactions to form secondary sublife such as sulfate, nitrate and ammonium, which are important precursors for haze formation, namely NH3Is an important prerequisite for forming PM2.5, and accounts for 20-60% of the total amount of PM2.5 in China. In addition, these secondary organisms, after settling, can cause eutrophication of the water body, acidification of the soil, disruption of biodiversity and affect the net gas exchange between the atmosphere and the biosphere, and thus NH in animal husbandry3Emission reduction is always a research hotspot at home and abroad.
Many researches report that straws or padding are covered on the surface of a manure pile, and adsorbents such as sulfur, ferrous sulfate, phosphate ore, biochar, calcium superphosphate and zeolite can be added in the composting process to effectively reduce NH in the composting process3However, these NH groups3The emission reduction measures are often caused by increasing workload, increasing fertilizer cost, influencing composting effect and the like, so that the measures are rarely used in actual composting production practiceTo the application. Therefore, most of the technologies for removing the feces fermentation odor still rely on tail end collection and treatment, for example, common deodorization facilities comprise a spray tower, a filter tank, a trickling filter tower and the like, and the industry commonly uses a multi-stage filler spray tower and a filter tank, wherein the spray tower usually adopts chemical and physical methods to realize rapid deodorization, and is matched with tail end biological deodorization, but the investment and the operation cost of the deodorization method are too high, and the deodorization method is not capable of bearing the livestock and poultry breeding industry. Aiming at the high ammonia odor of the excrement fermentation, the equipment investment can be reduced only by shortening the reaction time in order to reduce the cost, although the ammonia is very soluble in water, if the ammonia in the odor is quickly adsorbed/absorbed, the ammonia can be realized only by the fastest chemical reaction, but the chemical deodorization medicament cost is also too high. Therefore, how to provide a technology for efficiently recovering ammonia gas is a technical problem which needs to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a high ammonia gas recovery system for excrement, and the technical problems to be solved by the utility model are as follows: how to recover ammonia gas generated by fermenting excrement.
The purpose of the utility model can be realized by the following technical scheme:
a high ammonia recovery system of excrement and urine, including spraying the unit, circulating unit, adding the acid unit, precipitating the unit, adding alkali unit and recovery unit;
the spraying unit is provided with a plurality of spraying heads;
the circulating unit comprises a reservoir and a circulating water pump, the reservoir is positioned below the spray header, the reservoir is connected with the spray header through a pipeline, and the circulating water pump is used for lifting water in the reservoir to the spray header through the pipeline;
the acid adding unit comprises an acid adding barrel and an acid adding water pump, the acid adding barrel is connected with the water storage tank through a pipeline, and the acid adding water pump is used for pumping acid in the acid adding barrel into the water storage tank;
the sedimentation unit includes wastewater disposal basin, lifting water pump, sedimentation tank, mixer, magnesium salt container and backward flow water pump, the wastewater disposal basin is connected through the pipeline with the cistern, the lower part of sedimentation tank is connected with the wastewater disposal basin through the pipeline, lifting water pump is arranged in promoting the water of wastewater disposal basin to the sedimentation tank, be provided with first net that separates in the sedimentation tank, the mixer is installed in the top of sedimentation tank, and the stirring leaf of mixer is located the first top that separates the net, and the magnesium salt container is linked together through the pipeline with the below of sedimentation tank, the backward flow water pump through the pipeline with the sedimentation tank in the first water extraction that separates the net top to the sedimentation tank in first separate the net below.
The alkali adding unit comprises an alkali adding barrel and an alkali adding water pump, the alkali adding barrel is connected with the lower part of the precipitation barrel through a pipeline, and the alkali adding water pump is used for pumping alkali water in the alkali adding barrel into the precipitation barrel;
the recovery unit comprises a drying tank, the drying tank is connected with the bottom of the settling tank through a pipeline, a water outlet is formed in the drying tank, a second separation net is arranged on the water outlet, and the water outlet is connected with the wastewater tank through a pipeline.
In foretell high ammonia recovery system of excrement and urine, the unit that sprays includes spray column and glass steel fan, the glass steel fan is linked together through the top of pipeline with the spray column, the glass steel fan is used for carrying the waste gas that produces the fermentation workshop compost to the spray column in, be provided with a plurality of shower heads in the spray column.
In foretell high ammonia recovery system of excrement and urine, the unit that sprays is including spraying room and negative-pressure air fan, negative-pressure air fan is used for carrying the waste gas that produces fermentation workshop compost to spraying in the room, be provided with a plurality of shower heads in the room that sprays.
In the fecal high ammonia gas recovery system, the acid adding unit further comprises a first PH meter, a probe of the first PH meter is placed in the water reservoir, and when the first PH meter detects that the PH of water in the water reservoir is greater than 7, the acid adding water pump is controlled to pump acid in the acid adding barrel into the water reservoir so as to keep the PH of the water in the water reservoir to be less than 7.
In the fecal high ammonia gas recovery system, the alkali adding unit further comprises a second PH meter, a probe of the second PH meter is placed in the precipitation barrel, and when the PH of the water in the precipitation barrel is detected to be less than 8.5, the alkali adding water pump is controlled to pump the alkaline water in the alkali adding barrel into the precipitation barrel so as to keep the PH of the water in the precipitation barrel between 8.5 and 9.0.
In the excrement high ammonia gas recovery system, the sedimentation barrel is provided with a plurality of drain pipes.
A recovery method of the excrement high ammonia gas recovery system comprises the following steps:
A. extracting waste gas generated by fermentation in the fermentation workshop to a spraying unit;
B. starting a first pH instrument, detecting the pH value in the wastewater pool, and controlling an acid adding water pump to pump acid in an acid adding barrel into the water pool when the first pH instrument detects that the pH value of water in the water pool is greater than 7 so as to keep the pH value of the water in the water pool to be less than 7;
C. starting a circulating water pump, pumping water in the reservoir to a spray header, spraying waste gas through the spray header to absorb ammonia gas, and dropping the sprayed water into a wastewater pool for reuse;
D. when the ammonia EC in the water reservoir reaches 280ms/cm, opening a pipeline between the water reservoir and the wastewater pool, and enabling water in the water reservoir to flow into the wastewater pool;
E. starting a lifting water pump, pumping water in the wastewater tank to a precipitation barrel, starting a stirrer, and stirring the water in the precipitation barrel;
F. starting a second pH meter, detecting the pH value in the precipitation barrel, and controlling an alkali adding water pump to pump alkali water in the alkali adding barrel into the precipitation barrel when the pH value of water in the precipitation barrel is detected to be less than 8.5 so as to keep the pH value of the water in the precipitation barrel between 8.5 and 9.0;
G. when the pH value of the water in the sedimentation barrel is kept between 8.5 and 9.0, adding magnesium salt into the sedimentation barrel, starting a reflux water pump, and pumping and refluxing the water above the first separation net in the sedimentation barrel to the lower part of the first separation net in the sedimentation barrel;
H. stopping the operation of the stirrer and the reflux water pump after 20min, standing the water in the sedimentation barrel for 3h, discharging clear water above the sedimentation barrel through a drain pipe above the sedimentation barrel, and discharging sediment at the bottom of the sedimentation barrel to a drying tank through a pipeline;
I. and naturally drying the precipitate in the drying tank.
In the method for recovering high ammonia from feces, in step B, the acid is concentrated phosphoric acid; in step G, the magnesium salt is magnesium chloride or magnesium sulfate or magnesium oxide.
Compared with the prior art, the utility model has the following advantages:
this recovery system carries out deodorization and absorbs the ammonia in the waste gas through spraying the unit to waste gas, and the rethread deposits the unit and realizes the recovery to nitrogen, phosphorus, not only carries out high-efficient deodorization ammonia to the waste gas that the fermentation produced, reduces air pollution, still to ammonia, phosphoric acid recycle, generates high-efficient slowly-releasing fertilizer, reduces the deodorization cost, improves economic benefits greatly.
Drawings
FIG. 1 is a schematic structural diagram of a recycling system according to an embodiment;
FIG. 2 is a schematic structural diagram of a recycling system according to the second embodiment.
In the figure, 1, a spraying unit; 2. a circulation unit; 3. an acid addition unit; 4. a precipitation unit; 5. an alkali adding unit; 6. a recovery unit; 7. a shower head; 8. a reservoir; 9. a water circulating pump; 10. adding an acid barrel; 11. adding an acid water pump; 12. a wastewater tank; 13. lifting the water pump; 14. a settling barrel; 15. a blender; 16. a first screen; 17. adding an alkali barrel; 18. adding an alkali water pump; 19. a drying tank; 20. a spray tower; 21. a glass fiber reinforced plastic fan; 22. a demister; 23. a first pH meter; 24. a second pH meter; 25. a reflux water pump; 26. a water outlet; 27. a second screen; 28. a drain pipe; 29. a spraying chamber; 30. a negative pressure fan; 31. a first room; 32. a second room; 33. a plastic water curtain; 34. an air outlet; 35. and (4) a magnesium salt container.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the drawings, but the present invention is not limited to these embodiments.
The first embodiment is as follows:
as shown in fig. 1, the recovery system comprises a spraying unit 1, a circulating unit 2, an acid adding unit 3, a precipitation unit 4, an alkali adding unit 5 and a recovery unit 6; the spraying unit 1 is provided with a plurality of spraying heads 7; the circulating unit 2 comprises a reservoir 8 and a circulating water pump 9, the reservoir 8 is positioned below the spray header 7, the reservoir 8 is connected with the spray header 7 through a pipeline, and the circulating water pump 9 is used for lifting water in the reservoir 8 to the spray header 7 through the pipeline; the acid adding unit 3 comprises an acid adding barrel 10 and an acid adding water pump 11, the acid adding barrel 10 is connected with the water storage tank 8 through a pipeline, and the acid adding water pump 11 is used for pumping acid in the acid adding barrel 10 into the water storage tank 8; the sedimentation unit 4 comprises a wastewater tank 12, a lifting water pump 13, a sedimentation barrel 14, a stirrer 15, a magnesium salt container 35 and a backflow water pump 25, specifically, the stirrer 15 comprises a motor and a stirring blade, the motor is arranged above the sedimentation barrel 14, the stirring blade is connected with an output shaft of the motor, and the stirring blade is placed in the sedimentation barrel 14; the waste water tank 12 is connected with the water storage tank 8 through a pipeline, the lower part of the sedimentation barrel 14 is connected with the waste water tank 12 through a pipeline, the lifting water pump 13 is used for lifting water in the waste water tank 12 into the sedimentation barrel 14, the first separation net 16 is arranged in the sedimentation barrel 14, the stirring machine 15 is arranged above the sedimentation barrel 14, the stirring blade of the stirring machine 15 is positioned above the first separation net 16, the magnesium salt container 35 is communicated with the lower part of the sedimentation barrel 14 through a pipeline, the water above the first separation net 16 in the sedimentation barrel 14 is extracted to the lower part of the first separation net 16 in the sedimentation barrel 14 through a pipeline by the backflow water pump 25, the flow of water at the bottom of the sedimentation barrel 14 is accelerated by the backflow water pump 25, and the sediment generated in the barrel is used as a crystal seed, so that the sediment is accelerated; the alkali adding unit 5 comprises an alkali adding barrel 17 and an alkali adding water pump 18, wherein the alkali adding barrel 17 is connected with the lower part of the precipitation barrel 14 through a pipeline, and the alkali adding water pump 18 is used for pumping alkali water in the alkali adding barrel 17 into the precipitation barrel 14; the recovery unit 6 comprises a drying tank 19, the drying tank 19 is connected with the bottom of the settling barrel 14 through a pipeline, a water outlet 26 is arranged in the drying tank 19, a second separation net 27 is arranged on the water outlet 26, the water outlet 26 is connected with the wastewater tank 12 through a pipeline, a water outlet 26 is arranged in the drying tank 19, the second separation net 27 is arranged on the water outlet 26, and when sediment in the settling barrel 14 flows into the drying tank 19, the drying of the sediment can be accelerated through the normally open water outlet 26. .
In the recovery system, waste gas generated by composting is extracted to a spray unit 1, the spray unit 1 sprays acidic water to the waste gas through a spray header 7, so that ammonia in the waste gas is dissolved in the water, the water dissolved with the ammonia in a reservoir 8 can be used for multiple times, namely the water is extracted to the spray header 7 through a circulating water pump 9 to absorb ammonia and soluble odor in odor, when EC (electrical conductivity) of the water in the reservoir 8 reaches 280ms/cm, the water in the reservoir 8 is discharged to a waste water tank 12, the water in the waste water tank 12 is extracted to a sedimentation barrel 14 through a lifting water pump 13, alkali water and magnesium salt stored in a magnesium salt container 35 are added into the sedimentation barrel 14 to start a stirrer 15 to stir, so that the ammonia, phosphoric acid and magnesium salt in the waste water in the sedimentation barrel 14 generate sediment under an alkaline condition, the sediment is struvite, the struvite is dried in a drying tank 19 through a pipeline, finally, struvite can be secondarily utilized as an efficient slow-release fertilizer. This recovery system carries out the ammonia in deodorization and the absorption waste gas through spraying unit 1 to waste gas, and rethread precipitation unit 4 realizes the recovery to nitrogen, phosphorus, not only carries out high-efficient deodorization ammonia to the waste gas that the fermentation produced, reduces air pollution, still to ammonia, phosphoric acid recycle, generates high-efficient slowly-releasing fertilizer, reduces the deodorization cost, reduces the working costs, improves economic benefits greatly.
As shown in fig. 1, in this embodiment, the spraying unit 1 includes a spraying tower 20 and a glass fiber reinforced plastic fan 21, an air outlet of the glass fiber reinforced plastic fan 21 is communicated with a top of the spraying tower 20 through a pipeline, the glass fiber reinforced plastic fan 21 is used for conveying waste gas generated by composting in a fermentation workshop into the spraying tower 20, and a plurality of spraying heads 7 are disposed in the spraying tower 20. In the structure, the glass fiber reinforced plastic fan 21 conveys waste gas generated by composting in a fermentation workshop to the bottom of the spray tower 20, the waste gas flows from the bottom to the top in the spray tower 20 by means of the power of the glass fiber reinforced plastic fan, the ammonia in the waste gas is dissolved by the acid sprayed by the spray tower 20, the dissolved water falls into the reservoir 8 again, and the waste gas after acid cleaning is discharged in the upper air through the glass fiber reinforced plastic centrifugal fan 21 and a chimney at the rear end. As other embodiments, a demister 22 is further disposed in the spray tower 20, and the demister 22 can effectively remove mist generated during spraying in the spray tower 20, and reduce damage of water vapor to the rear-end glass fiber reinforced plastic centrifugal fan 21.
As shown in fig. 1, in the embodiment, the acid adding unit 3 further includes a first PH meter 23, a probe of the first PH meter 23 is placed in the water reservoir 8, and when the first PH meter 23 detects that the PH of water in the water reservoir 8 is greater than 7, the acid adding water pump 11 is controlled to pump acid water in the acid adding barrel 10 into the water reservoir 8 so as to maintain the PH of water in the water reservoir 8 to be less than 7. In this structure, detect the pH value of water in the cistern 8 through first PH appearance 23, automatic control adds sour water pump 11 and adds the sour water of water in to the cistern 8 for water in the cistern 8 keeps PH <7 all the time. Preferably, the acid is concentrated phosphoric acid.
As shown in fig. 1, in this embodiment, the alkalifying unit 5 further includes a second PH meter 24, a probe of the second PH meter 24 is placed in the precipitation tub 14, and when it is detected that the PH of the water in the precipitation tub 14 is less than 8.5, the alkalifying water pump 18 is controlled to pump the alkali water in the alkalifying tub 17 into the precipitation tub 14, so as to maintain the PH of the water in the precipitation tub 14 between 8.5 and 9.0. In the structure, the PH value of the water in the sedimentation barrel 14 is detected by the second PH meter 24, and the alkali water pump 18 is automatically controlled to add alkali water into the water in the sedimentation barrel 14, so that the PH value of the water in the sedimentation barrel 14 is kept between 8.5 and 9.0. Preferably, the alkaline water is a 40% sodium hydroxide solution.
As shown in fig. 1, in this embodiment, a water outlet 26 is disposed in the drying tank 19, a second partition net 27 is disposed on the water outlet 26, and the water outlet 26 is connected to the wastewater tank 12 through a pipeline. In the structure, a water outlet 26 is arranged in the drying tank 19, a second separation net 27 is arranged on the water outlet 26, and when sediment in the sedimentation barrel 14 flows into the drying tank 19, the drying of the sediment can be accelerated by the normally open water outlet 26.
Example two:
as shown in fig. 2, the recycling system of the present embodiment has substantially the same structure as that of the first embodiment, except that the spraying unit 1 includes a spraying room 29 and a negative pressure fan 30, the negative pressure fan 30 is used for conveying waste gas generated by composting in the fermentation workshop to the spraying room 29, and a plurality of spray heads 7 are disposed in the spraying room 29. The present embodiment can be applied to the case where the shower unit 1 is the shower booth 29. Specifically, the shower room 29 comprises a first room 31 and a second room 32, the first room 31 and the second room 32 are arranged adjacently, plastic water curtains 33 are arranged at the bottoms of the first room 31 and the second room 32, and as other embodiments, plastic fillers are arranged at the bottoms of the first room 31 and the second room 32 to ensure ventilation between the first room 31 and the second room 32. The plastic water curtain 33 is provided with a first group of spray headers 7, the middle part of the second room 32 is provided with a second group of spray headers 7, the first group of spray headers 7 and the second group of spray headers 7 are both connected with a circulating water pump, the top part of the second room 32 is also provided with an air outlet 34, the negative pressure fan 30 extracts waste gas generated by fermentation in the fermentation workshop into the first room 31, the waste gas enters the bottom part of the second room 32 after being sprayed by the first group of spray headers 7 and then is sprayed by the second group of spray headers 7, complete deodorization and ammonia removal of the waste gas can be ensured, and the waste gas after deodorization and ammonia removal is discharged through the air outlet 34.
Example three:
the present embodiment provides a recycling method using the recycling system of the first embodiment or the second embodiment, wherein the recycling method includes the following steps:
A. extracting waste gas generated by fermentation in a fermentation workshop to a spraying unit 1; namely, the waste gas is extracted to the spray tower 20 through the glass fiber reinforced plastic fan 21, or the waste gas is extracted to the spray room 29 through the negative pressure fan 30;
B. starting a first pH meter 23, detecting the pH value in the wastewater tank 12, and when the first pH meter 23 detects that the pH value of water in the water storage tank 8 is greater than 7, controlling an acid adding water pump 11 to pump acid in an acid adding barrel 10 into the water storage tank 8 so as to keep the pH value of the water in the water storage tank 8 less than 7, so as to keep the circulating water acidic and maintain the high ammonia absorption of the circulating water; preferably, the acid is concentrated phosphoric acid.
C. Starting a circulating water pump 9, pumping water in a reservoir 8 to a spray head 7, spraying waste gas through the spray head 7 to absorb ammonia gas, and dropping the sprayed water into a wastewater pool 12 for reuse;
D. when EC (namely conductivity) in the water reservoir 8 reaches 280ms/cm, a pipeline between the water reservoir 8 and the wastewater pool 12 is opened, and water in the water reservoir 8 flows into the wastewater pool 12;
E. starting a lifting water pump 13, pumping water in the wastewater tank 12 to a sedimentation barrel 14, starting a stirrer 15, and stirring the water in the sedimentation barrel 14;
F. starting a second pH meter 24, detecting the pH value in the precipitation barrel 14, and controlling an alkali adding water pump 18 to pump alkali water in an alkali adding barrel 17 into the precipitation barrel 14 when the pH value of water in the precipitation barrel 14 is detected to be less than 8.5 so as to keep the pH value of the water in the precipitation barrel 14 between 8.5 and 9.0; preferably, the alkaline water is a 40% sodium hydroxide solution.
G. When the pH value of the water in the sedimentation barrel 14 is kept between 8.5 and 9.0, magnesium salt is added into the sedimentation barrel 14, a reflux water pump 25 is started, and the water above the first separation net 16 in the sedimentation barrel 14 is pumped back to flow below the first separation net 16 in the sedimentation barrel 14;
H. the stirrer 15 and the reflux water pump 25 stop working for 20min, the water in the sedimentation barrel 14 stands for 3h, clear water above the sedimentation barrel 14 is discharged through a drain pipe 28, and sediment at the bottom of the sedimentation barrel 14 is discharged to a drying tank 19 through a pipeline; clear water above the sedimentation barrel 14 is discharged to the reservoir 8 or the wastewater tank 12 through a drain pipe 28 above the sedimentation barrel 14; in other embodiments, the sediment in the sedimentation barrel 14 can be discharged to the drying tank 19 after single or multiple times of sedimentation according to the quantity of the sediment;
I. and naturally drying the sediment in the drying tank 19.
Preferably, in step G, the magnesium salt is magnesium chloride or magnesium sulfate; struvite in the precipitate generated by the reaction of magnesium chloride or magnesium sulfate has high purity, and the magnesium chloride or magnesium sulfate can be directly dissolved in water. As another example, magnesium oxide may be substituted for the magnesium salt in order to reduce the cost of magnesium salts, and the recovery rate of phosphorus is not changed (> 99%), but the recovery rate of ammonia is reduced.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Claims (6)
1. A high ammonia recovery system of excrement and urine, characterized by comprising a spraying unit (1), a circulating unit (2), an acid adding unit (3), a precipitation unit (4), an alkali adding unit (5) and a recovery unit (6);
the spraying unit (1) is provided with a plurality of spraying heads (7);
the circulating unit (2) comprises a water storage tank (8) and a circulating water pump (9), the water storage tank (8) is positioned below the spray header (7), the water storage tank (8) is connected with the spray header (7) through a pipeline, and the circulating water pump (9) is used for lifting water in the water storage tank (8) to the spray header (7) through the pipeline;
the acid adding unit (3) comprises an acid adding barrel (10) and an acid adding water pump (11), the acid adding barrel (10) is connected with the water storage tank (8) through a pipeline, and the acid adding water pump (11) is used for pumping acid in the acid adding barrel (10) into the water storage tank (8);
the sedimentation unit (4) comprises a wastewater pool (12), a lifting water pump (13), a sedimentation barrel (14), a stirrer (15), a magnesium salt container (35) and a reflux water pump (25), the waste water tank (12) is connected with the water storage tank (8) through a pipeline, the lower part of the sedimentation barrel (14) is connected with the waste water tank (12) through a pipeline, the lifting water pump (13) is used for lifting the water in the wastewater tank (12) to the sedimentation barrel (14), a first separation net (16) is arranged in the sedimentation barrel (14), the stirrer (15) is arranged above the sedimentation barrel (14), and the stirring blade of the stirrer (15) is positioned above the first separation net (16), the magnesium salt container (35) is communicated with the lower part of the sedimentation barrel (14) through a pipeline, the reflux water pump (25) pumps water above the first separation net (16) in the sedimentation barrel (14) to the lower part of the first separation net (16) in the sedimentation barrel (14) through a pipeline;
the alkali adding unit (5) comprises an alkali adding barrel (17) and an alkali adding water pump (18), the alkali adding barrel (17) is connected with the lower part of the precipitation barrel (14) through a pipeline, and the alkali adding water pump (18) is used for pumping alkali water in the alkali adding barrel (17) into the precipitation barrel (14);
recovery unit (6) are including mummification pond (19), mummification pond (19) are connected through the bottom of pipeline with precipitation bucket (14), be provided with delivery port (26) in mummification pond (19), be provided with the second on delivery port (26) and separate net (27), delivery port (26) are connected with wastewater disposal basin (12) through the pipeline.
2. The excrement high ammonia gas recovery system according to claim 1, wherein the spray unit (1) comprises a spray tower (20) and a glass fiber reinforced plastic fan (21), the glass fiber reinforced plastic fan (21) is communicated with the top of the spray tower (20) through a pipeline, the glass fiber reinforced plastic fan (21) is used for conveying waste gas generated by composting in a fermentation workshop into the spray tower (20), and a plurality of spray headers (7) are arranged in the spray tower (20).
3. A fecal high ammonia recovery system according to claim 1 characterized in that the spray unit (1) comprises a spray booth (29) and a negative pressure air blower (30), the negative pressure air blower (30) is used to transport the waste gas generated by composting in the fermentation workshop into the spray booth (29), and several spray headers (7) are arranged in the spray booth (29).
4. A fecal high ammonia recovery system according to claim 1 characterized in that the acid adding unit (3) further comprises a first pH meter (23), the probe of the first pH meter (23) is placed in the reservoir (8), when the first pH meter (23) detects that the pH of the water in the reservoir (8) is >7, the acid adding water pump (11) is controlled to pump the acid in the acid adding barrel (10) into the reservoir (8) to keep the pH of the water in the reservoir (8) at < 7.
5. The high ammonia recovery system from feces according to claim 1, wherein the alkalifying unit (5) further comprises a second pH meter (24), a probe of the second pH meter (24) is placed in the precipitation barrel (14), and when the pH of the water in the precipitation barrel (14) is detected to be less than 8.5, the alkalifying water pump (18) is controlled to pump the alkaline water in the alkalifying barrel (17) into the precipitation barrel (14) so as to maintain the pH of the water in the precipitation barrel (14) between 8.5 and 9.0.
6. A fecal high ammonia recovery system according to any of the claims 1-5 characterized in that the precipitation vat (14) is provided with several drainage pipes (28).
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