Production line and factory setup overview
A small system converting fresh grapes to raisins through sorting, optional permitted pretreatment, tray or rack loading, forced-air solar-tunnel drying, auxiliary drying, moisture conditioning and packing.
Recommended lowest-entry line configuration For the lowest credible entry, select a modular solar tunnel holding 200-500 kg of fresh grapes per batch, with food-grade racks, solar-powered fans, temperature and humidity sensors and a small auxiliary heater.
200-500 kg/batchstarter fresh-grape load
3-10 daysweather-dependent drying cycle
15-18%typical target raisin moisture
3-6entry operators
Production process and implementation sequence
- Fresh-grape receiving, variety segregation and defect sorting
- Gentle washing where required and surface draining
- Optional buyer-approved pretreatment or dipping
- Single-layer tray or rack loading
- Forced-air solar-tunnel drying with regular monitoring
- Rack rotation and optional auxiliary heat during weak sun
- Cooling and moisture conditioning in food-grade bins
- Destemming where required, grading, packing and storage
Products, capacity and market fit
- Afghan grapes can be converted near vineyards, reducing fresh-fruit loss and transport pressure.
- An enclosed tunnel protects fruit from dust, insects and sudden light rain better than open drying.
- Solar heat reduces routine fuel use while an auxiliary heater improves completion reliability.
- Modular tunnels let growers add capacity after one harvest season proves the product and market.
- Solar-dried green raisins - Buyer-approved color, moisture, cleanliness and texture - Domestic premium and export-oriented buyers
- Solar-dried dark raisins - Uniform natural color and stable moisture - Retail, bakery and ingredient buyers
- Industrial raisin grade - Food-safe smaller fruit within processor contract limits - Bakeries, confectionery and further processing
Core production machinery and line specifications
| Machine / stage | Function / value | Production note |
|---|---|---|
| Sorting and preparation tables | Removes damaged grapes and prepares uniform lots | Shaded, washable food-contact surfaces |
| Wash and drain station | Cleans grapes only where the process specification requires it | Potable water and complete surface drainage |
| Food-grade drying trays and racks | Holds grapes in shallow ventilated layers | Removable, washable and corrosion-resistant |
| Solar tunnel enclosure | Captures heat while shielding fruit from dust, pests and rain | UV-stable cover, screened air inlets and service aisle |
| Solar air collector and circulation fans | Raises air temperature and moves moisture out of the tunnel | Variable airflow with photovoltaic supply |
| Auxiliary indirect-air heater | Completes drying during weak sun or high humidity | Small clean-energy backup with no flue gas on product |
| Temperature, humidity and product-moisture instruments | Guides airflow, rack rotation and batch release | Logged inlet, outlet and product readings |
| Conditioning bins and pack sealer | Equalizes moisture and packs stable raisins | Food-grade covered bins and semi-manual packing |
Raw materials, utilities and factory requirements
- Sound Afghan grapes from varieties proven suitable for raisins
- Potable water
- Only legally permitted pretreatment materials accepted by the target market
- Food-grade trays, liners, pouches and cartons
- Labels and lot-coding consumables
- High-sun drying site with safe drainage and wind protection
- Photovoltaic supply or stable electricity for fans and instruments
- Small clean auxiliary heat source
- Potable water and hygienic preparation area
- Dry, cool conditioning and finished-raisin storage
Indicative low-entry investment and implementation plan
These planning ranges prioritize economical machinery, local labor and local civil works. Final pricing follows confirmed capacity, product specification, delivery terms and site conditions.
| Scope | Indicative range | Entry-plan note |
|---|---|---|
| Sorting, washing and preparation equipment | US$2k-5k | Simple food-grade launch area |
| Solar tunnel, collector, trays and racks | US$5k-13k | One 200-500 kg/batch module |
| Fans, instruments and auxiliary heater | US$3k-8k | Hybrid completion capability |
| Conditioning, grading and semi-manual packing | US$3k-7k | Basic finished-product section |
| Installation, freight and initial spares | US$3k-7k | Use safe local civil fabrication where practical |
| Indicative low-entry total | US$16k-40k | Land, building, grapes, cold store and optical sorter excluded |
Detailed proposal and next step
The proposal contains the complete line flow, machinery scope, raw-material and utility requirements, implementation stages and indicative entry planning. Final configuration follows confirmed products, capacity, site and budget.