Process plan for building small-scale organic fertilizer production line equipment

With the rapid development of animal husbandry and planting industry in China, a large number of livestock and poultry manure produced by large-scale breeding can not be disposed of in time and become pollution sources. How to treat these pollution sources from the source and make rational use of them as soon as possible? Considering various factors, the ideal way is to use all kinds of large, medium and small organic fertilizer production lines and processing equipment to recycle these wastes for ecological utilization.

Tongda heavy industry company after years of development, all kinds of organic fertilizer production line equipment technology and process has been mature, and verified in the market, by the customer’s recognition and support. This complete set of equipment can quickly ferment and dry waste organic matter, no secondary pollution, environmental protection and energy saving, large output, can meet the requirements of environmental protection and industrial production. Today we look at the small organic fertilizer production line equipment factory construction process.

Basis and conditions for setting up equipment for small organic fertilizer production line:

1.The quality of this product conforms to the national standards for organic fertilizer, special green food fertilizer and organic compound fertilizer.

2.Product models are divided into five series: grain, vegetables (fruits and vegetables, vegetable leaves), fruit trees, flowers and lawns. Each series of crops according to the growth characteristics of the preparation of thousands of models.

3.Reliable supply of raw materials. The main raw materials of this product are livestock and poultry dung, and auxiliary materials include waste such as peat, wood chips, straw, bean cake, horn bone meal, etc. The supply of surrounding materials shall not be less than 70 tons/day.

4.The main raw materials of organic fertilizer production include: pig manure, cow manure and chicken manure from farms; Ingredients include: straw, straw, charcoal, grass carbon, rice husk and so on.

5.The production process of organic fertilizer basically includes: inoculation and fermentation of organic materials (pre-fermentation), main fermentation, grinding, compound and mixing, drying, granulation, cooling, screening, metering and packaging and other processes.

Organic fertilizers mainly have the following characteristics:

1.Full nutrient and high content. Contains a variety of nutrients needed for the growth of crops.

2.Fertilizer effect lasts for a long time, which has both forward strength and later effect. It can fully meet the needs of various nutrients in the whole growth period of crops and does not take off fertilizer in the later growth period.

3.Easy to use, do base fertilizer – sub – application, application method is simple, labor saving, time saving, labor saving.

4.The cost is low and the price is relatively low among similar commodities.

5.High efficiency, input-output ratio of 1:10~30 or more.

6.Widely used, widely applicable to all kinds of soil and various crops, including a variety of greenhouse vegetables, fruit trees, economic crops, food crops and medicinal materials, flowers, lawns, seedlings, etc. (different formulas).

Small organic fertilizer production line basic process flow:

1.Fermentation process section of organic fertilizer

(1) fermentation

With 20 tons of cow dung, 10 tons of chicken dung and 20 tons of pig dung as raw materials, they were added into the mixed pre-fermentation device (imported from the Netherlands) to inoculate, fully mix and pre-ferment organic materials.

(2) the main fermentation

Using three-stage horizontal anaerobic fermentation equipment (patented equipment), adding biological strains, the fermentation temperature is controlled at 50-56℃, and the color is dark brown after the completion of fermentation, without feces odor but with the smell of compost. After biogas is collected, it enters the biogas boiler through the water-sealed tank and the flame arrester for combustion to provide heat for the fermentation device, granulation and drying unit.

2.Compounding process section of organic fertilizer

(1)The ingredients (straw, straw, bean cake, bone meal, hoof and horn powder, etc.) were crushed, while the inorganic fertilizer was crushed.

(2) Raw material blending and mixing

Organic and inorganic ingredients are mixed according to different series of products. Blend well in a blender. Let’s say it’s 12%, about 12 tons.

(3) Water content control

Adding straw powder or peat, organic materials with high C/N ratio and low moisture content, the amount of adding is 6 tons/day of charcoal, 6 tons/day of grass carbon and 18 tons/day of straw and wheat straw. After treatment, the moisture content of raw materials is 50%-65% and the C/N ratio is 20-30. The added material must be thoroughly crushed.

3.Organic fertilizer granulation process

(1)Fermentation storage for 1 day after the crushing, the fermentation of good organic materials for drying, crushing, screening.

(2) Combination and mixing

In the process of making a series of special fertilizer, according to different soil conditions and different crops, add inorganic nutrients and concentrate organic matter and trace element minerals, so that the fertilizer contains a variety of nutrients needed for plant growth, such as nitrogen, phosphorus, potassium, sodium, manganese, zinc, copper and so on. According to the formula will be nitrogen, phosphorus, potassium and good fermentation materials for computer mixing ratio, conveying to the granulator for granulation. Organic and inorganic ingredients are mixed according to different series of products. Blend well in a blender. Let’s say it’s 12%, about 12 tons.

(3) the granulation

Due to the production of biological fertilizer, organic matter is the main, cellulose is much, forming conditions are poor, and the addition of a fertilizing function of living bacteria, the production process is not exposed to high temperature and other characteristics. Building material is unfavorable use disk granulation and drum granulating method, because the two kinds of technology, the requirements of raw material grinding fineness, high granulating moisture is high, a stream of water content to around 30%, drying for this load is large, the loss is great bacteria effectively, and into the ball low rate, (60% ~ 70%), the production process of dust is very big, the operating environment is very poor, Therefore, for the production of organic biological fertilizer, the production of environmental extrusion method should be better, the environmental extrusion of raw material crushing requirements are low, the molding rate is up to more than 95%, the particle water content after molding is low, the drying load is small, can reduce the loss of effective bacteria, dust is small, the operation environment is better.

Raw material into the granulator, add the right amount of water or steam, bonded into granules, granulation after the material through the belt conveyor into the dryer for drying. The particle diameter was 3.0-4.0mm, and the granulation rate was greater than 70%

Note: Different raw materials are suitable for different granulation processes. For example, the water content of pig manure is much greater than that of sheep manure, which directly affects the final granulation results. Specific production process and organic fertilizer equipment is more appropriate, the need to consult relevant manufacturers in detail when planning the construction of organic fertilizer plant.

(4) dry

In the production process of biological fertilizer, not only the water content of the particles after forming should generally exceed the index and need to be dried at low temperature, but also the water content of the organic material after fermentation is about 30%~40%, and the water content of the particles after granulation is generally between 15%~20%. The fertilizer quality index requires that the water content is less than 14%, so it needs to be dried. Therefore, the drying section is an indispensable and important process in the production process of biological fertilizer, which directly affects the output, quality and energy consumption. It is very important for the manager to choose the model specifications of the dryer and control the process conditions.

In order to avoid the effective living bacteria in the drying process due to high temperature and death, the drying temperature of the material shall not be higher than 60℃(generally 50℃), so the hot air temperature in contact with the material should be different according to the water content of the material, generally not more than

130℃, it is necessary to control the hot air temperature by sections, which can improve the thermal efficiency and avoid the death of effective living bacteria. According to these features, the belt type dryer is suitable, this machine is suitable for low temperature and low moisture drying, and can control the temperature of the hot air to enter, to ensure that the material temperature is not higher than in the whole process of drying temperature, the tail also can increase the natural wind cooling section, cools the association materials immediately after drying, have the function of multi-usage, drying of permeability is good granular fertilizer, Very suitable, and the material drying is stable and uniform, particles are not damaged by any, residence time and feeding speed can be adjusted, in order to achieve the drying effect, because most of the hot air can be recycled, high thermal efficiency, heat source can be used to provide steam biogas boiler.

In the front of the dryer is provided with a secondary granulation area, the material in this section can achieve secondary granulation. Then the feed plate full dry material will raise, the dryer tail through exhauster pipelines, take out wet hot air, into the sedimentation chamber settlement, exhaust after through settlement after washing tower spray dust, spray water recycled by water pump, after dealing with the secondary dust, exhaust gas chimney discharged into the atmosphere.

(5) to cool

The drying material is sent into the cooling machine through the belt conveyor for cooling. The cooling process is mainly to use the fan to send the natural air into the cooling machine through the pipeline for cooling the material. The wind direction of the cooling machine is countercurrent, and the exhaust gas and the drying exhaust gas pumped into the settlement room by the fan and the pipeline are processed and discharged into the atmosphere.

After cooling, the material enters the screening, the large particle material is crushed and the screened powder material enters the return material belt and is transported to the granulator for regranulation, and the finished product enters the automatic packaging system for packaging.

Characteristics of production process of small organic fertilizer production line:

(1) Recovering and utilizing bio-energy by high-temperature two-stage fermentation with anaerobic fermentation irrigation. This project plans to use biogas to generate electricity, using mature gas generator set or dedicated biogas generator set.

(2) the use of organic fertilizer granulator, can be in 20%~40% of the moisture content caused by solid spherical particles, greatly save energy and equipment, improve the efficiency.

(3) in the drying process is specially equipped with polishing, mixing round function, make the granule more smooth.

(4) can be pure organic fertilizer granulation, or organic, inorganic fertilizer granulation, no special requirements for granulation materials.