CN210683632U - Utilize production system of anaerobism natural pond sediment production solid fertilizer - Google Patents

Abstract

The utility model discloses an utilize production system of anaerobism natural pond sediment production solid fertilizer, including mixing raw materials storage yard, good oxygen fermentation vat, ageing feed bin, chain slat feeder, band conveyer, rubbing crusher, screening machine, proportioning bins, nutrition regulator proportioning bins, stirring mixer, granulation trimmer, drum-type stoving cooling integration equipment, quantitative packaging machine. The utility model provides a perfect, economical and applicable production system which can reasonably utilize biogas residues and straws, and has short production period, energy conservation and environmental protection. The organic fertilizer produced by the process has high production efficiency and good fertility.

Description

Utilize production system of anaerobism natural pond sediment production solid fertilizer

Technical Field

The utility model relates to a fertilizer technical field, concretely relates to utilize production system of anaerobism natural pond sediment production solid fertilizer.

Background

Years of research and practice prove that organic wastes generated in human life and environment, such as: the most practical and effective treatment method for organic matters, crop straws, fallen forest leaves, greening vegetation, grass cutting, kitchen waste, livestock excrement and the like separated from household garbage is dry anaerobic fermentation, and three substances of biogas, biogas slurry and biogas residues are generated after fermentation. Wherein: the marsh gas can be used for gas power generation; the water of the biogas slurry after reaching the standard through sewage treatment can be used for production; how to effectively utilize the biogas residues containing rich nutrient components to change waste into valuable, and creating economic benefits, environmental benefits and social benefits to the maximum extent is a big problem at present.

In recent years, with the rapid development of socioeconomic performance of China, the urbanization process is accelerated, the living standard of people is rapidly improved, and the yield of municipal domestic waste is increased day by day. Domestic garbage is generated by 0.9-1.2 kg per person per day, and the daily life is increased by 3% -5% per year. The release display of the national environmental protection department 2016: in 2015, the production of 246 domestic wastes of large and medium cities in China is 18564 ten thousand tons, and the total quantity of the domestic wastes produced in rural areas is 49640 thousand tons every year. There are three main methods for domestic and foreign treatment of municipal solid waste: landfill, incineration and partial composting (kitchen waste and livestock manure compostable). For vast rural areas, the work of centralized treatment of domestic garbage has not been referred to a counseling agenda.

China is a big agricultural country and gradually accelerates the urbanization process, and the current problems are as follows: firstly, the yield of various agricultural crop straws is very high, at least more than 70 percent of the straws are not effectively utilized at present, and the straws are mainly burnt out in the field, so that a great deal of resource waste and environmental pollution are caused; secondly, the urban and rural environment greening level is continuously improved, and the grass cutting and tree falling of greening vegetation are increased year by year; thirdly, the breeding industry is continuously developed, and the excrement of the livestock is gradually increased.

At present, organic matters, kitchen waste, livestock and poultry manure, crop straws, fallen leaves of forest trees, greening vegetation, grass cutting and the like in the household garbage are basically collected and then burned or buried, so that a large amount of resources are wasted, environmental pollution is caused, and land for burying is increased.

In a word, if the organic matters in large quantity are collected to be used as fermentation raw materials, the produced biogas, biogas slurry and biogas residues can be further effectively utilized, a large amount of energy can be regenerated, and meanwhile, the landfill land can be reduced, and the problem of serious environmental pollution can be solved.

Chinese patent document CN 101774848B (201010011344.4) discloses a biogas residue organic fertilizer and a preparation method thereof, which comprises the steps of pretreatment of biogas residue, blending before granulation, granulation and shaping, drying and cooling. The method has the advantages that the biogas residue pretreatment time is as long as 5-6 months, air drying and solidification are adopted, the solidification efficiency is low, and the straws and the like cannot be fully utilized. Chinese patent document CN101229982A (200810014630.9) discloses a method for producing an organic compound fertilizer from biogas residues, wherein straws are added into the biogas residues to prepare an organic fertilizer, but the straws are not decomposed, so that the organic fertilizer cannot be fully utilized, and diseases and insect pests are increased.

At present, the difference of products of solid organic fertilizer produced by biogas residues at home and abroad is very large, and the solid organic fertilizer is difficult to meet the requirement of 'organic fertilizer standard' (NY525-2012) standard 'of agricultural industry standard of the people's republic of China, so that the solid organic fertilizer cannot be sold or has few market demands, and the main reason is that: the process technology has the characteristics of weak pertinence, incompleteness, mismatching, low automation control level and unstable product quality in the process of manufacturing the organic fertilizer by using the biogas residues as the raw materials.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, provide a perfect, economical and applicable production process which can reasonably utilize biogas residues and straws, and has the advantages of short production period, energy conservation and environmental protection. The organic fertilizer produced by the process has high production efficiency and good fertility.

In order to achieve the purpose, the technical scheme of the utility model is to design a production process for producing solid organic fertilizer by using biogas residues, which comprises the following steps:

(1) mixing of raw materials

Dehydrating biogas residues generated by anaerobic fermentation of organic matters until the water content of the biogas residues is 70-75%, and adding crushed straws with the water content of 10-20% to enable the water content of the uniformly mixed raw materials to be 60-65%; the volume ratio of the biogas residues to the straws is 4-6: 1;

stacking the mixed raw materials in a uniformly mixed raw material yard, adding a fermentation microbial inoculum to form a mixed material, and fully and uniformly mixing the raw materials by using a pile turning machine;

(2) material distribution and aerobic fermentation of mixed materials

Selecting the aged mixed material from bottom to top, feeding the mixed material into an aerobic fermentation tank, fully mixing the mixed material, performing primary fermentation, moving the mixed material at the feeding end to the discharging end by a movable upender the next day, leaving the length of the feeding end meeting the material distribution requirement of one day, performing a new round of material distribution, and circularly reciprocating until the material reaches the discharging end to complete the whole fermentation period;

the aerobic fermentation period of the mixed material is 10-15 days, and the water content of the material after aerobic fermentation is 40-45%;

(3) secondary ageing of material after aerobic fermentation

Taking the fermented material out of the discharge end of the fermentation tank by using a forklift and conveying the fermented material to an aging area, wherein the aging period of the material for producing the powdered fertilizer is 20-25 days, and the water content of the aged material is 30-33%; the material aging period for producing the granular fertilizer is 10-15 days, and the water content of the aged material is 35-37%;

(4) preparation of powdered fertilizer

Crushing the aged material by a crusher, and then feeding the crushed material into a sieving machine to be sieved, wherein the particle size of the sieved material is less than or equal to 2 mm; mixing the screened materials with a nitrogen source, a phosphorus source and a potassium source according to a standard, stirring, mixing and bagging; the total adding amount of the nitrogen source, the phosphorus source and the potassium source is combined with the content of original nitrogen, phosphorus and potassium in the material, and the nitrogen, phosphorus and potassium are added according to the calculated amount according to the content of the produced organic fertilizer with different standards;

(5) preparation of granular fertilizer

Crushing the aged material by a crusher, and then feeding the crushed material into a sieving machine to be sieved, wherein the particle size of the sieved material is less than or equal to 2 mm; mixing the screened materials with a nitrogen source, a phosphorus source and a potassium source according to a standard, stirring, mixing and bagging; the water content of the mixed material is 34-35%; adding water to adjust the water content of the material to 35-36%, feeding the material into a granulator for granulation, and feeding the granulated material into a drum-type drying, cooling and screening integrated device for drying after granulation.

As the preferred technical scheme, the raw materials in the raw material pretreatment are mixed in a mode that biogas residues and crushed straws are tiled and stacked, and the biogas residues and the straws are alternately placed; the thickness of the layer laid by the biogas residues is less than 10mm, and the thickness of the layer laid by the straws is determined by calculation according to the water content of the biogas residues and the straws. The raw material pretreatment is carried out by uniformly mixing the biogas residues, the crushed straws and the fermentation inoculant together, and the stacking height of the mixed materials is 1.2-1.5 m.

According to the preferable technical scheme, the width of the aerobic fermentation tank is 4-5m, and the height of the aerobic fermentation tank is 1.6-2 m; the aerobic fermentation tank is provided with a feeding end and a discharging end, the lengths of the feeding end and the discharging end are 1/10-1/15 of the total length of the aerobic fermentation tank respectively, the bottom of the aerobic fermentation tank is provided with a tank bottom aeration coil pipe, dense and orderly vent holes are formed in the circumference of the aeration coil pipe, and the arrangement, the quantity and the air supply pressure of the vent holes in the aeration coil pipe from the feeding end to the discharging end of the aerobic fermentation tank are determined according to the oxygen demand of the mixed materials at each stage.

According to the preferable technical scheme, the drying and granulating process of the granular materials is that hot air is arranged at the front section of the drum-type drying, cooling and screening integrated equipment to dry and dehumidify the granular materials; the middle section is cold air, the granular materials are cooled and further dehumidified, and the water content of the granular materials is guaranteed to be 20-22%; and screening the cooled granular materials at the rear section, wherein the size of a sieve pore is 8-12 meshes.

A production system for producing solid organic fertilizer by using anaerobic biogas residues comprises a blending raw material yard, an aerobic fermentation tank, an aging bin, a chain plate feeder, a belt conveyor, a crusher, a screening machine, a proportioning bin, a nutrition regulator proportioning bin, a stirring mixer, a granulation shaping machine, a drum-type drying and cooling integrated device and a quantitative packaging machine;

the discharge ports of the biogas residue bin and the straw bin are respectively connected with one end of a belt conveyor, and the other end of the belt conveyor is connected with a blending raw material yard; a forklift is arranged between the blending raw material storage yard and the feeding end of the aerobic fermentation tank; a movable upender is arranged at the feed end of the aerobic fermentation tank, a tank bottom aeration coil is arranged at the bottom of the aerobic fermentation tank, vent holes are arranged on the circumference of the tank bottom aeration coil, and a forklift is arranged between the discharge end of the aerobic fermentation tank and an upper hopper of the chain plate type feeder; a discharge port of the chain plate type feeder is communicated with a feed port of the crusher through a belt conveyor, and the discharge port of the crusher is connected with a feed end of the first screening machine; the oversize materials are conveyed by a belt conveyor and returned to the feed inlet of the crusher for crushing again; conveying the undersize materials into a proportioning bin by a belt conveyor; the discharge ports of the proportioning bin and the nutrition regulator proportioning bin are communicated with the feed port of the stirring mixer, the discharge port of the stirring mixer is connected with the feed port of the granulating and shaping machine through a belt conveyor, and the discharge port of the granulating and shaping machine is communicated with the feed port of the drum-type drying and cooling integrated equipment through the belt conveyor; the front section of drum-type stoving cooling integration equipment and hot-blast main entry intercommunication, the back end and the cold air duct entry intercommunication of drum-type stoving cooling integration equipment are equipped with exhaust gas exhaust apparatus in the middle of the drum-type stoving cooling integration equipment, and the discharge gate of drum-type stoving cooling integration equipment is connected with the feed inlet of second screening machine, and the oversize of second screening machine is connected with quantitative packaging machine through band conveyer respectively with undersize.

As a preferable technical scheme, the waste gas exhaust device comprises an exhaust pipeline and a bag-type dust collector which are communicated with each other.

The utility model has the advantages and the beneficial effects that:

(1) the utility model discloses the bio-organic fertilizer of making is with organic waste and organic waste rubbish that agricultural production produced carry out aerobic fermentation once more for the natural pond sediment that raw materials anaerobic fermentation produced and obtains, further degrades the organic matter for the raw materials thoroughly becomes thoroughly decomposed, can not burn the root system because of secondary fermentation, compares fermentation period with prior art and is short, and the fermentation is complete.

(2) By controlling the oxygen demand of the aerobic fermentation in different periods, the aerobic fermentation time is reduced, and the fermentation rate of the biogas residues is improved.

(3) The utility model discloses a solid fertilizer compares with traditional chemical fertilizer and has soil and not harden, and the effect of agricultural production afterward strength is big, once fertilizes can at least in three years internal medicine performance fertility effect, and this kind of fertilizer is used annually, and soil can be more and more fertile, is favorable to crops to grow and develops.

(4) The utility model discloses the bio-organic fertilizer who makes accords with the agricultural industry standard of the people's republic of china "organic fertilizer standard" (NY525-2012) standard and "bio-organic fertilizer" (NY884-2012) standard, adds other inorganic fertilizer through the right amount, satisfies the many-sided demand of vegetation, reduces cultivation cost, alleviates peasant burden.

Drawings

FIG. 1 is a process flow diagram of the present invention;

in the figure: 1. a biogas residue bin; 2. a straw bin; 3. uniformly mixing the raw material storage yard; 4. an aerobic fermentation tank; 5. an aging bin; 6. a pulverizer; 7. a first screening machine; 8. a proportioning bin; 9. a nutrition regulator batching bin; 10. stirring and mixing the materials; 11. a granulating and shaping machine; 12. a drum-type drying and cooling integrated device; 13. a second screening machine; 14. a quantitative packaging machine; 15. a hot air duct; 16. an exhaust gas exhaust device; 17. a cold air pipeline.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

A production process for producing a solid organic fertilizer by using biogas residues comprises the following steps:

(1) mixing of raw materials

Dehydrating biogas residues generated by anaerobic fermentation of organic matters until the water content of the biogas residues is 70-75%, and adding crushed straws with the water content of 10-20% to enable the water content of the uniformly mixed raw materials to be 60-65%; the volume ratio of the biogas residues to the straws is 4-6: 1;

stacking the mixed raw materials in a uniformly mixed raw material yard, adding a fermentation microbial inoculum to form a mixed material, and fully and uniformly mixing the raw materials by using a pile turning machine;

(2) material distribution and aerobic fermentation of mixed materials

Selecting the aged mixed material from bottom to top, feeding the mixed material into an aerobic fermentation tank, fully mixing the mixed material, performing primary fermentation, moving the mixed material at the feeding end to the discharging end by a movable upender the next day, leaving the length of the feeding end meeting the material distribution requirement of one day, performing a new round of material distribution, and circularly reciprocating until the material reaches the discharging end to complete the whole fermentation period;

the aerobic fermentation period of the mixed material is 10-15 days, and the water content of the material after aerobic fermentation is 40-45%;

(3) secondary ageing of material after aerobic fermentation

Taking the fermented material out of the discharge end of the fermentation tank by using a forklift and conveying the fermented material to an aging area, wherein the aging period of the material for producing the powdered fertilizer is 20-25 days, and the water content of the aged material is 30-33%; the material aging period for producing the granular fertilizer is 10-15 days, and the water content of the aged material is 35-37%;

(4) preparation of powdered fertilizer

Crushing the aged material by a crusher, and then feeding the crushed material into a sieving machine to be sieved, wherein the particle size of the sieved material is less than or equal to 2 mm; stirring, mixing and bagging the screened materials, a nitrogen source, a phosphorus source and a potassium source according to standards; the total adding amount of the nitrogen source, the phosphorus source and the potassium source is less than or equal to 10 percent of the material; the total addition amount is combined with the original nitrogen, phosphorus and potassium content in the materials, and the total addition amount is added according to the calculated amount according to the content of the produced different standard organic fertilizers;

(5) preparation of granular fertilizer

Crushing the aged material by a crusher, and then feeding the crushed material into a sieving machine to be sieved, wherein the particle size of the sieved material is less than or equal to 2 mm; stirring, mixing and bagging the screened materials, a nitrogen source, a phosphorus source and a potassium source according to standards; the water content of the mixed material is 34-35%; adding water to adjust the water content of the material to 35-36%, feeding the material into a granulator for granulation, and feeding the granulated material into a drum-type drying, cooling and screening integrated device for drying after granulation.

The raw material pretreatment adopts the mixing mode that biogas residues and crushed straws are tiled and stacked, and the biogas residues and the straws are alternately placed; the thickness of the layer laid by the biogas residues is less than 10mm, and the thickness of the layer laid by the straws is determined by calculation according to the water content of the biogas residues and the straws. The raw material pretreatment is carried out by uniformly mixing the biogas residues, the crushed straws and the fermentation inoculant together, and the stacking height of the mixed materials is 1.2-1.5 m.

The width of the aerobic fermentation tank is 4-5m, and the height of the aerobic fermentation tank is 1.6-2 m; the aerobic fermentation tank is provided with a feeding end and a discharging end, the lengths of the feeding end and the discharging end are 1/10-1/15 of the total length of the aerobic fermentation tank respectively, the bottom of the aerobic fermentation tank is provided with a tank bottom aeration coil pipe, dense and orderly vent holes are formed in the circumference of the aeration coil pipe, and the arrangement, the quantity and the air supply pressure of the vent holes in the aeration coil pipe from the feeding end to the discharging end of the aerobic fermentation tank are determined according to the oxygen demand of the mixed materials at each stage.

The drying and granulating process of the granular materials is that hot air is arranged at the front section of the drum-type drying, cooling and screening integrated equipment to dry and dehumidify the granular materials; the middle section is cold air, the granular materials are cooled and further dehumidified, and the water content of the granular materials is guaranteed to be 20-22%; and screening the cooled granular materials at the rear section, wherein the size of a sieve pore is 8-12 meshes.

A production system for producing solid organic fertilizer by using anaerobic biogas residues comprises a blending raw material yard, an aerobic fermentation tank, an aging bin, a chain plate feeder, a belt conveyor, a crusher, a screening machine, a proportioning bin, a nutrition regulator proportioning bin, a stirring mixer, a granulation shaping machine, a drum-type drying and cooling integrated device and a quantitative packaging machine which are sequentially arranged;

biogas residues and straws are respectively stored in a biogas residue bin 1 and a straw bin 2, the biogas residues and the straws are respectively conveyed to a blending raw material storage yard 3 by a belt conveyor to be blended and aged, the aged mixture is conveyed to a feeding end of an aerobic fermentation tank 4 by a forklift, a movable upender is arranged at the feeding end of the aerobic fermentation tank, a tank bottom aeration coil is arranged at the bottom of the aerobic fermentation tank, vent holes are arranged on the circumference of the tank bottom aeration coil, and the aerobically fermented material at the discharging end of the aerobic fermentation tank is placed in an aging bin 5 by the forklift; the materials in the aging bin are conveyed into an upper hopper of a chain plate type feeder by a forklift, are conveyed to a feed port of a crusher 6 by a belt conveyor through uniform distribution, and a discharge port of the crusher is connected with a feed end of a first sieving machine 7; the oversize materials are conveyed by a belt conveyor and returned to the feed inlet of the crusher for crushing again; the undersize is sent into a proportioning bin 8 by a belt conveyer; the discharge ports of the proportioning bin and the nutrition regulator proportioning bin 9 are communicated with the feed port of the stirring mixer 10, the discharge port of the stirring mixer is connected with the feed port of the granulating and shaping machine 11 through a belt conveyor, and the discharge port of the granulating and shaping machine is communicated with the feed port of the drum-type drying and cooling integrated equipment 12 through the belt conveyor; the front section of drum-type stoving cooling integration equipment and hot-blast main 15 entry intercommunication, the back end and the cold air duct 17 entry intercommunication of drum-type stoving cooling integration equipment are equipped with exhaust gas exhaust apparatus 16 in the middle of the drum-type stoving cooling integration equipment, and the discharge gate of drum-type stoving cooling integration equipment is connected with the feed inlet of second screening machine, and the oversize and undersize of second screening machine 13 are connected with quantitative packaging machine 14 through band conveyer respectively.

The exhaust gas exhaust device comprises an exhaust pipeline and a bag-type dust collector which are communicated with each other.

The process can be used for producing both powder fertilizer and granular fertilizer.

The production process of the powder fertilizer comprises the following steps:

(1) raw material source and mixing for preparing fertilizer

Biogas residues generated by the anaerobic fermentation of the organic matters are dewatered and then conveyed to a blending raw material yard of an organic fertilizer making workshop by a belt conveyor. According to the requirement of the fertilizer preparation process, the water content and the uniformity of the water content of the fertilizer preparation raw materials must be controlled, so that a proper amount of crushed plant straws needs to be mixed in the biogas residues according to the difference of the water content of the biogas residues, the mixing process of the straws is finished in a blending raw material yard, and the water content of the blending raw materials is controlled to be 60%.

The mixing mode is that biogas residues and straws are layered and tiled and stacked, namely a layer of biogas residues is tiled, a layer of crushed straws is tiled on the biogas residues, a layer of biogas residues is tiled on the crushed straws, and a layer of biogas residues is tiled on the biogas residues, the two materials are tiled alternately, and the thickness of the tiled layer is determined by calculation according to the water content of the biogas residues and the straws; the size and height of the material pile can be determined according to site conditions.

(2) Distributing and aerobic fermentation

Distributing materials to the fermentation tank once every day, taking materials from one side of the uniformly mixed raw material yard to the lower side and the upper side by adopting a forklift, respectively feeding the materials into a plurality of good-culture fermentation tanks, uniformly distributing the materials to the feeding end of the tanks, and then starting the aerobic fermentation process; the next day, the movable upender is used for turning, raw materials can be further mixed uniformly in the turning process, the raw materials are moved to the discharge end of the fermentation tank, and after the length of the feed end which can meet the material distribution requirement of one day is set free, the material distribution process of the current day is started; the process is circulated until the material reaches the discharging end of the fermentation tank. The fertilizer preparation raw materials complete the whole aerobic fermentation period, and the aerobic fermentation period is generally 10-15 days. Therefore, the lengths of the feeding end and the discharging end are 1/10-1/15 of the total length of the aerobic fermentation tank respectively. The days of the fermentation period are determined according to the components and the characteristics of the fermentation raw materials, and the important point is that all the raw materials fed into the tank are completely fermented in the aerobic fermentation period. The water content of the material after aerobic fermentation is controlled to be 40 percent.

The width of the fermentation tank is 4-5m and the height is 1.6-2 m. The number and length of the fermentation tanks are mainly determined according to site conditions, production capacity and fermentation period determined according to raw material conditions.

In the aerobic fermentation process: sufficient fresh air is supplied to the materials by the aeration coil pipe at the bottom of the tank (dense and orderly vent holes are arranged on the circumference of the aeration pipe) so as to meet the requirement of aerobic fermentation of the materials on oxygen.

The installation mode of the aeration coil pipe at the bottom of the tank, the arrangement and the number of the vent holes on the pipe and the selection of the air supply pressure are mainly determined according to the raw material conditions (including air permeability) and the thickness of the cloth in the tank. Because the oxygen demand of the materials is different in each stage of aerobic fermentation, a sectional quantitative gas supply method is adopted in the length direction of the fermentation tank.

(3) Discharging and ageing

Taking out the fermented materials from the discharge end of the fermentation tank by using a forklift, conveying the fermented materials to an aging area, and piling the fermented materials into aging material piles respectively according to the discharge time for aging the materials. Under normal conditions, the material for producing the powder fertilizer needs to be aged for 20 days, and the water content of the aged material is controlled to be 33%.

(4) Crushing and sieving

And conveying the aged material to a hopper at the upper part of a chain plate feeder by using a forklift, uniformly distributing the material, conveying the material to a crusher by using a belt conveyor, and conveying the crushed material to a screening machine by using the belt conveyor for screening. The oversize large-particle materials are conveyed by a belt conveyor to return to the belt conveyor and then are conveyed to a pulverizer to be continuously pulverized; materials with the screen size less than or equal to 2mm are qualified organic fertilizer raw materials and are conveyed to a proportioning bin through a belt conveyor.

(5) Compounding and blending

The batching system is provided with 4 batching bins, wherein 1 is an organic fertilizer batching bin produced by the process, and the other 3 are N, P, K batching bins respectively, according to the current national organic fertilizer production standard, ① organic fertilizer (NY525-2012), ② biological organic fertilizer (NY884-2012), ③ urban garbage agricultural control standard (GB 8172-87), the components are batched in proportion, materials which are well proportioned by a belt conveyor below the bins are conveyed to a stirring mixer for stirring and mixing, and then the mixture is conveyed to a bidirectional distributing belt conveyor by the belt conveyor.

(6) Powder fertilizer bagging-off

When the powder fertilizer is produced, the whole process of the bulk powder fertilizer production is completed after the ingredients are added. In order to facilitate storage, sale, transportation and fertilization of farmers, the process is provided with an automatic powder fertilizer metering and packaging function, namely, the powder fertilizer is conveyed to a packaging machine by a bidirectional material distributing belt conveyor for packaging, and automatic weighing and automatic packaging are realized.

The production process of the granular fertilizer comprises the following steps:

the source and the mixing of the raw materials for preparing the fertilizer, the distribution and the aerobic fermentation steps are the same as the steps for preparing the powder fertilizer, the material for producing the granular fertilizer needs to be aged for 10 days, and the water content of the aged material is controlled to be 37 percent.

The steps of crushing and sieving and compounding and mixing are also the same as in the preparation of the powdered fertilizer.

Granulating, drying and cooling:

after the nitrogen, phosphorus and potassium are mixed, the powder fertilizer is conveyed to a granulator by a bidirectional material-separating belt conveyor to be granulated. And then the granulated fertilizer is conveyed to drum-type drying, cooling and screening integrated equipment by a belt conveyor to be dried, cooled and screened. Hot air for drying is fed from a hot air inlet pipeline, and during the continuous and uniform rotation process of the drum-type drying, cooling and screening integrated equipment, the granular fertilizer is continuously dried and dehumidified by the hot air at the front section of the equipment so as to improve the strength of granular fertilizer particles; cold air is introduced into the middle section through a cold air inlet at the tail part of the roller to continuously cool and further dehumidify the granulated fertilizer, so that the granulated fertilizer meets the water content requirement of the organic fertilizer production standard; the dried and cooled waste gas is discharged by an exhaust device, and is sent to a bag-type dust remover through an exhaust pipeline to be discharged after reaching standards after dust removal.

Screening and packaging granular fertilizer:

and screening the cooled granular fertilizer at the rear section of the drum-type drying, cooling and screening integrated equipment, wherein the granular fertilizer is arranged below the screen, and the granular fertilizer is arranged above the screen, and is automatically weighed and packaged by a granular fertilizer packaging machine and a granular fertilizer packaging machine respectively.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (2)

1. A production system for producing a solid organic fertilizer by using anaerobic biogas residues is characterized by comprising a blending raw material yard, an aerobic fermentation tank, an aging bin, a chain plate feeder, a belt conveyor, a crusher, a screening machine, a proportioning bin, a nutrition regulator proportioning bin, a stirring mixer, a granulation shaping machine, a drum-type drying and cooling integrated device and a quantitative packaging machine;

the discharge ports of the biogas residue bin and the straw bin are respectively connected with one end of a belt conveyor, and the other end of the belt conveyor is connected with a blending raw material yard; a forklift is arranged between the blending raw material storage yard and the feeding end of the aerobic fermentation tank; a movable upender is arranged at the feed end of the aerobic fermentation tank, a tank bottom aeration coil is arranged at the bottom of the aerobic fermentation tank, vent holes are arranged on the circumference of the tank bottom aeration coil, and a forklift is arranged between the discharge end of the aerobic fermentation tank and an upper hopper of the chain plate type feeder; a discharge port of the chain plate type feeder is communicated with a feed port of the crusher through a belt conveyor, and the discharge port of the crusher is connected with a feed end of the first screening machine; the oversize materials are conveyed by a belt conveyor and returned to the feed inlet of the crusher for crushing again; conveying the undersize materials into a proportioning bin by a belt conveyor; the discharge ports of the proportioning bin and the nutrition regulator proportioning bin are communicated with the feed port of the stirring mixer, the discharge port of the stirring mixer is connected with the feed port of the granulating and shaping machine through a belt conveyor, and the discharge port of the granulating and shaping machine is communicated with the feed port of the drum-type drying and cooling integrated equipment through the belt conveyor; the front section of drum-type stoving cooling integration equipment and hot-blast main entry intercommunication, the back end and the cold air duct entry intercommunication of drum-type stoving cooling integration equipment are equipped with exhaust gas exhaust apparatus in the middle of the drum-type stoving cooling integration equipment, and the discharge gate of drum-type stoving cooling integration equipment is connected with the feed inlet of second screening machine, and the oversize of second screening machine is connected with quantitative packaging machine through band conveyer respectively with undersize.

2. The system for producing the solid organic fertilizer by using the anaerobic biogas residue as claimed in claim 1, wherein the exhaust gas exhaust device comprises an exhaust pipeline and a bag-type dust collector which are communicated with each other.

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