Expansion Project Of Advanced Technology 27-28T/H Fish Feed Plant For Eel Fish Shrimp Prawn Crab Feed Production

The customer's original eel fish feed plant project uses animal protein raw materials, starch, soybean meal, etc. as raw materials, and through the processes of mixing and crushing ingredients, the annual production of eel compound feed is 35,000 tons.

Work system of the 27-28 t/h fish feed plant

Before the expansion, there were 50 employees, of which 20 were accommodated in the fish feed manufacturing plant and 30 were not. The new expansion fish feed plant project has added 120 employees, of which 60 are accommodated in the fish feed plant and 60 are not. The working system of employees before and after the fish feed plant expansion remains the same, with 250 working days a year, 16 hours a day.

It can be calculated from the running time of the fish feed plant project, the output of the large 27-28 tons per hour advanced technology fish feed plant project is 9166t/m, 440t/d, 27.5t/h (27-28t/h).

Engineering economic and technical indicators

Foma Feed Co., Ltd. is located in Doushan Town, Taishan City, China. The 27-28 tons large fish feed production plant covers a total area of ​​81069.64m², the eel fish feed plant project base area before expansion is 8111.55m², and the construction area is 13049.75m².

• Before expansion: The main buildings in the eel fish feed plant area include: a 1-story workshop, a 5-story workshop tower, a 6-story staff dormitory, a 1-story canteen, and a 2-story office Building, 1 building and 1 floor warehouse.
• After expansion: The base area of ​​this fish feed plant expansion project is 20163.3m² and the building area is 32736.3m². The fish feed plant expansion project adds a 1-story workshop, a 1-story raw material workshop, a 7-story workshop work tower, and a 1-story workshop. The boiler room on the 1st floor and the power distribution room on the 1st floor of the building.

Product solutions of the large 27-28 t/h fish feed plant

The fish feed plant project before the expansion is mainly engaged in the production of eel compound feed, with an annual output of 35,000 tons of eel compound feed.

This aqua fish feed plant expansion project is mainly engaged in the production of multi-type pellet feed and extruded feed, with an annual output of 90,000 tons of complete compound pellet feed and 20,000 tons of extruded feed.

What's aquatic compound feed?

In different growth stages of aquatic products, according to nutritional needs, according to scientific formula, a variety of feeds from different sources are evenly mixed according to a certain proportion, and the feed is produced according to the specified technological process.

Main raw and auxiliary material consumption

Note: This 27-28 tons fish feed plant expansion project is equipped with two 10t/h biomass particulate matter-fired steam boilers (one of which is for standby). The amount of steam required for the granulation and maturation process of this expansion project is 120t/d (30000t/a), the amount of biomass fuel used is calculated as 600,000 kcal/ton of water evaporation heat, and the biomass calorific value is 4500 kcal/kg, the biomass boiler efficiency is 80%, the consumption of biomass pellets in this fish feed plant is 5,000 tons/year.

Biomass fuel is a new type of fuel supported by the Chinese state. It mainly uses rural corn stalks, wheat stalks, sawdust and other crops and solid wastes as raw materials. After crushing, it is pressurized and densified. It is a renewable resource. The biomass pellet components used in this fish feed plant project are shown in the table below.

Main fish food production machine for the fish feed plant

This fish feed plant expansion project mainly increases the production of pellet feed and extruded feed. The supporting aquafeed equipment before and after expansion is shown in the following table:

Water and electricity consumption of the automatic 27-28 t/h fish feed plant

Water supply and drainage

The water used in this aquatic fish feed plant project is mainly boiler water, waste gas treatment spray waste water supplementary water and employee domestic water, of which the boiler water consumption is 1780t/a, the waste gas treatment spray waste water supplementary water consumption is 2t/d, and the domestic water consumption is 3300t/a a.

The drainage system of this aquatic fish feed plant project adopts rainwater and sewage diversion system. Boiler sewage is clean sewage and is directly discharged through rainwater pipes.

The spray wastewater of the malodorous gas treatment system (water spray washing device) is recycled after sedimentation and is not discharged.

The oily sewage from the cafeteria is pretreated by the oil separator and the slag separator, and the ordinary domestic sewage is pretreated by the three-stage septic tank.

Power consumption

The electricity used in this fish feed manufacturing plant project is wired from the local power supply main line, and diesel generators are not used for the equipment. The electricity consumption before and after the expansion is shown in the table below.

Fish feed making process flow of the 27-28 t/h fish feed plant

After the raw materials are screened and magnetically separated, the meal will first enter the primary crushing system, and then be transported to the batching bin, while the powdery raw materials will directly enter the batching bin, and then the various materials will be mixed in proportion by the weighing system.

After mixing, it enters the ultra-fine pulverization system for pulverization, and after pulverization, the secondary ingredients are mixed, and then the qualified products are obtained through the steps of granulation, post-curing, cooling (air cooling), sieving and impurity removal, and packaging.

1. Feeding cleaning section of fish feed manufacturing plant:

   Design 2 feeding ports, and the feeding port is equipped with a grid screen which can be used as the first impurity removal equipment to remove impurities such as sack lines.

   Each feeding port is equipped with a separate pulse dust collector; the powder and meal are manually unpacked in the 1# workshop and put into the feeding port.

   After being sent to the main workshop by scraper and elevator for cleaning and iron removal, the meal Enter into the silo to be pulverized, and the powder enters the batching silo.

2. The first crushing section:

   A wide-screen hammer crusher is configured, and the crushed material enters the batching bin through the screw conveyor, elevator and distributor.

   The feeding device of the pulverizer adopts stepless speed change to meet the pulverization requirements of different materials, realize full-load work, improve pulverization efficiency, reduce power consumption, and work stably and reliably.

3. The first batching and mixing section:

   Design a double-scale batching system, each system has 24 batching bins, the bin capacity should reach more than 360m³, and the capacity of the primary mixer is 2 tons/batch.

   A pulse dust collector is set on the upper part (distributor) of the chute into the silo, which sucks air into the chute and the silo to prevent dust from escaping.

4. Second ultrafine pulverization section:

   A total of 4 ultrafine pulverizers are used to pulverize the batched raw materials. The micro-pulverizing pneumatic conveying system is equipped with Shakeron and circular pulse dust collectors, and a secondary negative pressure conveying dust removal system.

5. Second batching and mixing section:

   Design a double-scale batching system, there are two systems, each system is equipped with 4 batching bins, the bin capacity is more than 80m³, and each is equipped with a mixer of 2 tons/batch. The small material feeding port is equipped with a separate pulse dust collector.

6. Curing and cooling section:

   The mixed powder enters the silo to be granulated, and then enters the fish pellet making machine through the screw feeder and conditioner, and is pressed into various diameters by ring die with different apertures qualified products are obtained after post-curing, cooling and grading.

7. Packaging section of fish feed manufacturing plant:

   Qualified products are weighed by the finished product packaging scale and then sewn into the package; this section uses a total of 6 packaging scales, including 4 sets of 20kg large packaging and 2 sets of 5kg small packaging.

   For large packages over 20 kg, semi-automatic automatic wrapping and automatic thread trimming are used. Small packaged feed products under 5 kg are fully automatic canned and heat-sealed.

Extruded feed production process flow of floating fish

The production process of puffed feed adopts the first pulverization and then batching, intermittent mixing, (super) micro pulverization, secondary batching, puffing, drying, oil injection, cooling (air cooling), screening into the finished product warehouse and complete production of packaging craft.

1. Feeding cleaning section:

   Design 2 feeding ports, and the feeding port is equipped with a grid screen which can be used as the first impurity removal equipment to remove impurities such as sack lines. Each feeding port is separately equipped with a square pulse dust collector;

   Powder and meal are manually unpacked and put into the feeding port, and sent to the main workshop by scraper and elevator for cleaning and cleaning. After removing iron, the meal raw materials enter the silo to be pulverized, and the powder and auxiliary materials enter the batching silo.

2. First crushing section:

   One set of wide-screen hammer crusher is equipped, and the crushed material enters the batching bin through the screw conveyor, elevator and distributor. The feeding device of the pulverizer adopts stepless speed change to meet the pulverization requirements of different materials, realize full-load work, improve pulverization efficiency, reduce power consumption, and work stably and reliably.

3. First batching and mixing section:

   Design a double-scale batching system, each system has 24 batching bins, the bin capacity should reach more than 360m³, and the capacity of the one-time mixer is 2 tons/batch.

4. Secondary ultrafine pulverization section:

   A total of 6 ultrafine pulverizers are used to superfine the batched raw materials, and the pulverized powder enters the secondary batching bin by means of negative pressure pneumatic conveying.

5. Secondary batching mixing section:

   Design a double-scale batching system, which is divided into two systems, one of which has 5 batching bins with a capacity of 100m³, and the other set has 7 batching bins with a capacity of 140m³. The capacity of the secondary mixer is 2 tons/batch.

6. Drying, cooling and packaging section:

   The extruded feed enters the dryer for drying, and then passes through, sieving, thermal spraying, cooling, and re-screening to obtain qualified products, which enter the finished product warehouse for packaging.

Environmental measures of the automatic 27-28t/h fish feed plant

Exhaust gas

The waste gas produced by the fish feed plant project is mainly the process dust, stench, and combustion tail gas produced by the boiler.

Dust from the aqua feed production process

Aiming at the dust generated from feeding, crushing, granulating, cooling, screening, packaging and other processes in the feed production process, this fish feed plant project has set up 2 sets of dust and waste gas collection systems (one set of dust and waste gas collection systems for pellet feed and extruded feed) , that is, pulse dust collectors are installed after the units corresponding to the above-mentioned dust-producing sections (the dust generated in the crushing section is treated by cyclone and pulse dust collectors).

The dust can be uniformly discharged from the tube, and the dust will meet the second-stage secondary standard of the local standard "Air Pollutant Emission Limits" after being collected and processed. In general, after the dust is collected and processed, the emission is small and the impact on the surrounding environment is small.

Smells

The stench of the 27-28t/h aqua shrimp crab prawn fish feed plant project mainly comes from the granulation, curing and cooling processes of the aqua fish pellet feed production line, and the puffing, drying and cooling processes of the extruded fish feed production line.

The main pollutants are ammonia and trimethylamine. The odor generating nodes of the fish pellet feed production line and the odor generating nodes of the extruded fish feed production line of the project are all closed facilities.

The client aqua fish feed company has set up an exhaust system for the above closed facilities, and an air supply system has been added for drying and cooling.

We have set up 2 sets of waste gas collection and treatment facilities for the client company (using the combined process of water spray washing device + UV photolysis purifier). The exhaust gas treatment facility installed on the roof is used for treatment, and then discharged through the exhaust pipe at high altitude.

The malodorous gas is treated by a water spray washing device + UV photolysis purifier, and its treatment efficiency can reach more than 90%. The treated exhaust gas is discharged through a 15m high exhaust pipe, and the external exhaust gas can meet the "Odor Pollutant Emission Standard". The requirements for the emission standard value of odor pollutants have little impact on the surrounding atmospheric environment.

Boiler exhaust gas

The 27-28t/h customized fish feed plant project is equipped with two 10t/h biomass-fired boilers. The main pollutants of boiler exhaust gas are SO2, NOx and soot. The customer used "cyclone dust removal + cloth bag" to treat biomass combustion waste gas, and the dust removal rate is ≥ 95%. 765-2010), it is discharged through a 15m exhaust pipe, which meets the requirement that the discharge of the gas boiler chimney shall not be less than 8m.

After the above-mentioned corresponding measures are taken to deal with the boiler waste gas of the project, the impact on the regional ambient air is small.

Kitchen exhaust

The shrimp fish feed plant project kitchen is equipped with a fume purifier to purify the kitchen fume. The fume purification efficiency is 75%. After being treated by a high-efficiency electrostatic fume purification facility, it is led to the roof of the building. 》The requirements for small catering units have less impact on the surrounding atmospheric environment.

Noise

The main source of noise pollution in the fish feed plant project is the noise generated during the operation of the production equipment, and its source intensity is about 70~85dB(A).

After the construction unit adopts comprehensive prevention and control measures such as sound insulation, shock absorption, and noise reduction, and then attenuates the natural distance, the surrounding noise at the boundary of the fish feed plant can meet the requirements of Emission Standard for Environmental Noise at the Boundary of Industrial Enterprises (GB12348-2008). [That is, ≤60dB(A) during the day, ≤50dB(A) at night], and the impact on the surrounding acoustic environment is not obvious.

Solid waste

The solid waste during the operation period of the 27-28t/h fish feed plant project mainly includes: production waste, ash after biomass combustion, dust collected by boiler fume, waste ion exchange resin, packaging waste, domestic waste, etc.

• The process dust collected by the pulse dust collector in the production waste is reused in production, and the impurities that are initially cleaned in the warehouse will be cleared and transported by the sanitation department;
• The ash content after biomass combustion and the dust collected from boiler dust are handed over to nearby villagers for greening fertilizer or farmland fertilizer;
• The packaging waste is collected and handed over to the material company for recycling;
• Waste ion exchange resin shall be recycled and disposed of by units with hazardous waste management license;
• The domestic garbage is collected and sent to the sanitation department for centralized treatment.

After the solid waste generated by this 27-28t/h fish feed plant project has been properly treated, the impact on the surrounding environment will not be obvious.