HDPE 재활용 (high-density polyethylene recycling) is one of the highest-volume and most profitable plastic recycling streams worldwide — covering pipes, drums, crates, bottles, caps, and industrial containers. The full HDPE recycling process requires 6 categories of equipment, each with material-specific configurations that differ from PET, PVC, or PP recycling lines. Get the equipment selection wrong and you produce off-spec rHDPE pellets that fail buyer specifications. This guide covers every HDPE recycling machine category, complete line configurations, capital cost benchmarks, and a buyer’s checklist for sizing your HDPE recycling plant.
For pipe-specific HDPE recycling, see our dedicated 플라스틱 파이프 재활용 프로세스 가이드. For PET-specific equipment, see the PET flake dryer guide. This article focuses on HDPE recycling end-to-end equipment selection.
Why HDPE Is Different from Other Plastic Recycling Streams
HDPE has three properties that drive HDPE-specific equipment requirements:
- Low moisture sensitivity — HDPE absorbs less than 0.01% moisture from ambient air (PET absorbs 0.4–0.5%). HDPE recycling lines tolerate 3–5% moisture into the extruder for most applications, eliminating the need for crystallizers and desiccant dryers required by PET
- High mechanical toughness — HDPE pipes, drums, and containers are thick-walled and impact-resistant. Shredding and granulating equipment needs higher motor torque and reinforced blades compared to film or PET recycling
- Wide application diversity — HDPE waste streams range from clean post-industrial pipe scrap to contaminated post-consumer bottles to mixed-color crates. Equipment configuration depends heavily on input source quality
These properties keep HDPE recycling capital cost 30–50% below equivalent PET lines (no crystallizer, no desiccant dryer, simpler thermal stage) and operating cost 20–30% below PET (less drying energy). HDPE is the most economical plastic to recycle at scale.
The 6 Categories of HDPE Recycling Equipment
A complete HDPE recycling line uses equipment from these 6 categories, in sequence:
- HDPE 분쇄기 — primary size reduction (40–120 mm chips)
- HDPE granulator (pipe crusher) — secondary size reduction (8–15 mm flakes)
- HDPE washing line — friction washing, float-sink separation, optional hot wash
- HDPE dewatering / drying system — centrifugal dewatering and optional thermal drying
- HDPE 펠릿화기 — extrusion and pellet cutting
- Auxiliary equipment — sorting, metal detection, conveyors, storage silos
Some operations skip categories depending on input quality and end-product spec. Pipe extrusion plants with clean scrap can skip washing (categories 3 only need granulator + dryer + pelletizer). Plants selling unprocessed flakes can skip pelletizing. Most HDPE recycling plants use all 6 categories for high-value pellet output.
Category 1: HDPE Shredder
The HDPE shredder is the first machine in any HDPE recycling line. It reduces oversized HDPE waste — pipes, drums, IBC tanks, large containers, baled rigid scrap — into 40–120 mm chips that downstream equipment can handle.
HDPE Shredder Types
- Single-shaft HDPE shredder — 가장 일반적인 구성; 랜터 + 히드로릭 푸셔; 800–5,000 kg/h 처리량; 파이프, 드럼, 혼합 고정된 스캔프 처리에 적합
- 양쪽 축(둘레 축) HDPE 쇼어더 — 두 개의 반대 방향으로 회전하는 랜터; 처리량이 낮지만 혼합/오염된 폐기물을 더 잘 받아들이며; 500–3,000 kg/h
- 파이프 전용 HDPE 쇼어더 — 1,600 mm 직경, 6 m 길이의 장관 파이프까지 확장형 수평 피드; 인프라 파이프 재활용에 특화. 자세히 보기 HDPE 파이프 쇼어더 제품 페이지
- 이동식 HDPE 쇼어더 — 트레일러나 스키드 설치형 단위로 현장에서 분산된 HDPE 폐기물 흐름 처리. 자세히 보기 이동식 파이프 파쇄기
HDPE 쇼어더 사양
- Motor power: 처리량 및 재료 두께에 따라 30–250 kW
- Blade material: D2 도구 강철(표준) 또는 SKD-11(프리미엄); 깨끗한 HDPE에 8,000–12,000 시간의 서비스 생명
- 랜터 직경: 350–650 mm
- 출력 크기: 40–120 mm 스크린 제어
- 초기 투자 비용: 용량 및 구성에 따라 $30,000–$300,000
이동식 대 fixed 쇼어더 선택 기준에 대한 정보, 자세히 보기 mobile vs fixed shredder selection guide.
카테고리 2: HDPE 그란ولا이저(파이프 크러셔)
HDPE 그란ولا이저(또는 HDPE 크러셔, 파이프 크러셔)는 쇼어더 출력(40–120 mm 칩)을 8–15 mm 플리킹으로 줄입니다 — 씻기, 건조, extrusion에 필요한 크기. 그란ولا이저는 두 번째 크기 감소 단계로, 씻기와 펠릿화에 가는 실제 플리킹 출력을 생산합니다.
HDPE 그란ولا이저 유형
- 수증기 그란ولا이저 — 작업 중에 절삭 공간에 물이 주입됨; 날이 식어지고, 일부 표면 오염을 씻음, 먼지를 줄임; HDPE 후 소비자 흐름에 표준
- 건조 그란ولا이저 — no water in chamber; smaller footprint, no wastewater handling; suitable for clean pipe extrusion plant scrap
- 대형 HDPE 파이프 크러셔 — 두께가 두꺼운 파이프 칩에 특화; 넓은 피드 개구, 높은 토크. 자세히 보기 large diameter HDPE pipe crusher
HDPE 그란ولا이저 사양
- Motor power: 500–3,000 kg/h 용량에 따라 22–110 kW
- 높은 속도는 더 큰 센트리푸지 힘을 생성하여 더 많은 습도를 제거하지만, 에너지 소비, 소음, 손상을 증가시킵니다. 최적의 속도는 습도 제거와 운영 비용 간의 균형을 맞춥니다. 400–600 RPM (HDPE는 PET보다 높은 속도를 견딜 수 있습니다)
- 출력 플리킹 크기: 8–15 mm screen-controlled
- 초기 투자 비용: $25,000–$100,000
Category 3: HDPE Washing Line
그만큼 HDPE washing line cleans flakes from contamination (dirt, labels, residue, light contaminants) and separates HDPE from any cross-polymer mix. For HDPE-only post-industrial streams, washing is sometimes skipped. For post-consumer HDPE (bottles, drums) or infrastructure pipe (excavated soil), washing is mandatory.
HDPE Washing Line Stages
- Pre-washing tank — soaks flakes 5–10 minutes; loosens dirt and surface contamination
- 마찰 와셔 — high-speed mechanical scrubbing; 30–55 kW motor for 1 ton/h
- Float-sink separation tank — water density 1.0 g/cm³; HDPE (0.95 g/cm³) floats and is collected from the surface; PVC, PET, and other dense contaminants sink
- Hot wash (optional) — 80–95°C with caustic soda; removes labels and adhesives; needed for premium HDPE pellets
- Rinsing tank — clean water rinse before drying
HDPE Washing Line Specifications
- 용량: 500–3,000 kg/h typical for HDPE recycling
- Water consumption: 2–5 m³/ton of input flakes (closed-loop with filtration reduces by 60–80%)
- 초기 투자 비용: $80,000–$250,000 for complete HDPE washing line at 1 ton/h
Category 4: HDPE Dewatering & Drying System
Washed HDPE flakes leave the washing line at 30–40% surface moisture. The drying system reduces moisture to extrusion-ready spec.
Mechanical Dewatering (Mandatory)
에이 원심 탈수기 spins flakes at 800–1,500 RPM, throwing water radially through a perforated screen. Output: 2–4% moisture flakes ready for direct extrusion (HDPE only — PET would still need thermal drying).
- Motor power: 22–55 kW for 500–2,000 kg/h capacity
- Energy consumption: 30–50 kWh per ton dewatered
- 초기 투자 비용: $15,000–$45,000
For horizontal vs vertical centrifugal dewatering selection, see our comparison guide.
Thermal Drying (Optional for HDPE)
For premium HDPE pellets (fiber-grade, food-contact, high-spec extrusion), an optional 열 건조기 reduces moisture from 2–4% to under 0.5%. For most HDPE applications (pipe, drum, crate, low-spec), thermal drying is unnecessary — centrifugal dewatering alone produces extrusion-ready flakes.
- Motor + heater: 7.5 kW blower + 80–200 kW electrical heater
- Energy consumption: 120–180 kWh per ton evaporated
- 초기 투자 비용: $25,000–$80,000
For a complete drying-stage configuration, see our plastic drying system pillar guide.
Category 5: HDPE Pelletizing Machine
그만큼 HDPE 펠릿화기 melts dried flakes and forms them into recycled HDPE pellets ready for new product manufacturing. Single-screw extruders are most common for HDPE (vs. twin-screw, which is more common for PET because of higher degassing requirements).
HDPE Pelletizing Process
- Hopper feeding — dried HDPE flakes feed into the extruder hopper; level sensors maintain consistent feed
- 압출 — flakes melt at 180–220°C in the extruder barrel; screw conveys melt forward; degassing zone removes any residual moisture or volatiles
- 여과법 — melt passes through a screen changer (typically 60–100 mesh) to remove fines, paper, and other contamination
- 펠렛화 — die-face cutter (water ring) or strand pelletizer chops the extrudate into 2–4 mm pellets
- Cooling and storage — pellets cool in water, dry in centrifugal pellet dryer, and are bagged or silo-stored
HDPE Pelletizer Specifications
- Motor power: 55–250 kW for 300–2,500 kg/h pellet output
- Screw L/D ratio: 30:1–35:1 for HDPE (allows adequate melt time and degassing)
- 산출: 2–4 mm rHDPE pellets, density 0.95 g/cm³, MFI matched to virgin grade
- 초기 투자 비용: $50,000–$200,000
Category 6: Auxiliary Equipment
HDPE recycling lines need supporting equipment for material handling, contamination control, and quality assurance:
- 자기 분리기 — overhead drums or pulleys to remove ferrous metal from input stream; protects shredder/granulator blades
- Eddy current separators — non-ferrous metal removal (aluminum from caps, copper from cables); see our 와전류 분리 장치 가이드
- NIR sorters — automated polymer-type identification and removal of cross-polymer contamination; mandatory for mixed-source HDPE
- Conveyors — belt or screw conveyors between stages; capital cost $5,000–$25,000 per stage
- Storage silos — buffer storage between stages; smooths flow variations
- Quality control instruments — melt flow indexer, density meter, moisture analyzer; $20,000–$40,000 total
Complete HDPE Recycling Line Configurations
| 애플리케이션 | Equipment Required | 처리량 | 초기 투자 |
|---|---|---|---|
| HDPE pipe-to-pipe (closed loop) | All 6 categories | 500–3,000 kg/h | $250,000–$600,000 |
| HDPE bottle-to-bottle | All 6 + hot wash + label removal | 500~2,000kg/시간 | $300,000–$700,000 |
| HDPE drum/IBC tank recycling | Heavy-duty shredder + categories 2–6 | 500–2,500 kg/h | $280,000–$650,000 |
| Pipe extrusion plant inline (clean scrap) | Granulator + dryer + pelletizer (skip 1, 3) | 200~1,500kg/시간 | $80,000–$200,000 |
| Mixed post-consumer HDPE | All 6 + NIR sorting + extra wash stages | 500–2,500 kg/h | $400,000–$900,000 |
| Mobile HDPE shredding (no on-site pelletizing) | Mobile pipe shredder only | 800–4,500 kg/h | $80,000–$250,000 |
핵심 요약: HDPE pipe-to-pipe closed-loop recycling at 1 ton/h costs $250,000–$600,000 — significantly less than equivalent PET bottle-to-bottle ($600,000–$1,000,000+) because HDPE doesn’t need crystallizers or desiccant pellet dryers. The simpler thermal stage is HDPE’s biggest economic advantage over PET recycling.
HDPE Recycling Equipment Cost Breakdown
For a 1 ton/h HDPE recycling plant (typical mid-size operation), here’s how capital cost distributes across equipment categories:
| 범주 | 장비 | 일반적인 비용(USD) | 총 % |
|---|---|---|---|
| 1 | HDPE 분쇄기 | $60,000–$150,000 | 20–25% |
| 2 | HDPE granulator | $25,000–$80,000 | 10–15% |
| 3 | HDPE washing line | $80,000–$200,000 | 25–35% |
| 4 | Dewatering + optional thermal | $15,000–$80,000 | 5–15% |
| 5 | HDPE 펠릿화기 | $50,000–$180,000 | 20–30% |
| 6 | Auxiliary (sorters, conveyors, QC) | $30,000–$80,000 | 10–15% |
| Total | Complete 1 ton/h HDPE recycling plant | $260,000–$770,000 | 100% |
Add 15–25% to total for installation costs: foundation work, electrical hookup (typically 200–500 kW total connected load), wastewater treatment (if not already in place), and on-site commissioning.
HDPE Recycling Plant Buyer’s Checklist
Step 1: Identify Your Input Source
Pipe waste? Bottles? Drums? Mixed post-consumer? Each has different shredder and washing requirements. Pipe waste needs specialized horizontal-feed shredders. Bottles need label removal during washing. Drums need heavy-duty shredders for thick walls. Mixed streams need NIR sorting upstream.
Step 2: Define Your End-Product Spec
Pipe-grade pellets (low-spec, $800–$1,000/ton): centrifugal dewatering only, no thermal drying. Premium grade (extrusion molding, $1,000–$1,500/ton): add thermal drying. Food-contact rHDPE ($1,500–$2,000/ton): hot wash + thermal drying + extra QC. The end-product spec drives 30–40% of total equipment cost.
Step 3: Calculate Peak Throughput
Peak feed is typically 1.5–2× daily average due to batch operation and cleanup gaps. Size each equipment category for peak; install buffer hoppers between stages to absorb variations. The shredder is usually the throughput bottleneck — size it 20% above other categories.
Step 4: Verify Material of Construction
HDPE is non-corrosive, so carbon steel is acceptable for most equipment (vs. stainless steel mandatory for PET). However: if your line will also process PVC, specify acid-resistant materials (chlorine off-gassing). For food-contact rHDPE, use SS304 in all material-contact areas.
Step 5: Plan Wastewater Handling
HDPE washing lines use 2–5 m³ water per ton input. Closed-loop water recycling reduces consumption by 60–80% but adds $30,000–$80,000 to capital cost. Without closed-loop, plan for wastewater treatment infrastructure (settlement tanks, filtration, pH adjustment). Local wastewater discharge regulations vary widely — verify before line design.
HDPE Recycling Equipment Common Buyer Mistakes
Mistake 1: Buying Equipment Designed for PET
HDPE doesn’t need crystallizers or desiccant pellet dryers. Operations that buy “complete plastic recycling lines” sometimes get sold PET-spec equipment and pay 30–50% more capital cost for capabilities they don’t use. Specify HDPE-only equipment unless you’ll process PET on the same line.
Mistake 2: Skipping Float-Sink Separation
Float-sink separation seems redundant for “single-material HDPE” inputs. Reality: post-consumer HDPE always contains 1–3% PVC contamination from labels, fittings, or sorting errors. PVC at HDPE extrusion temperatures generates HCl and degrades the polymer. Always include float-sink stage for any non-pristine HDPE input.
Mistake 3: Undersizing the Pelletizer
The pelletizer is the most expensive single category and the throughput bottleneck for downstream output. Sizing the pelletizer at upstream peak rather than 80% utilization causes recurring melt instability and pellet quality issues. Size pelletizer at 110–120% of average input to give degassing time and quality margin.
Mistake 4: Inadequate Quality Control
rHDPE pellets need MFI, density, contamination, and moisture testing per batch to meet buyer specs. Operations selling rHDPE without consistent QC end up with rejected lots and stuck inventory. Budget $20,000–$40,000 for inline QC instrumentation as part of initial line design.
자주 묻는 질문
HDPE 재활용을 위해 필요한 장비는 무엇인가요?
A complete HDPE recycling line requires 6 categories of equipment: (1) HDPE shredder, (2) HDPE granulator/pipe crusher, (3) HDPE washing line (friction washer + float-sink + optional hot wash), (4) HDPE dewatering and optional thermal drying, (5) HDPE pelletizing machine, and (6) auxiliary equipment (magnetic/eddy current separators, NIR sorters, conveyors, QC instruments). Total: 8–14 individual machines for a 1 ton/h line.
How much does HDPE recycling equipment cost?
For a complete 1 ton/h HDPE recycling line: $260,000–$770,000 depending on input source quality and end-product spec. Pipe-to-pipe closed-loop: $250,000–$600,000. Bottle-to-bottle (with hot wash): $300,000–$700,000. Pipe extrusion plant inline (clean scrap, simpler line): $80,000–$200,000. Mobile-only operations: $80,000–$250,000. Add 15–25% for installation costs.
What is HDPE recycling?
HDPE recycling converts end-of-life high-density polyethylene products — pipes, drums, IBC tanks, bottles, caps, crates — into recycled HDPE (rHDPE) pellets for new product manufacturing. The process has 5 stages: collection & sorting, primary shredding (40–120 mm chips), secondary granulating (8–15 mm flakes), washing & separation, and drying & pelletizing. Output rHDPE pellets are typically 30–40% cheaper than virgin HDPE and suitable for new pipe extrusion (closed-loop), injection molding, and blow molding.
HDPE 재활용 장비와 PET 재활용 장비의 차이점은 무엇인가요?
Three main differences: (1) HDPE doesn’t need a crystallizer (PET requires one for sheet/bottle grades because amorphous PET sticks at high temperatures); (2) HDPE doesn’t need a desiccant pellet dryer (PET bottle-to-bottle requires sub-50 ppm moisture, achieved only with desiccant drying); (3) HDPE thermal drying is optional (PET thermal drying is mandatory). These differences make HDPE recycling lines 30–50% cheaper in capital cost and 20–30% cheaper in operating cost than equivalent PET lines.
HDPE 펠릿의 판매 가격은 얼마인가요?
Recycled HDPE (rHDPE) pellet prices vary by quality grade: pipe-grade rHDPE (low-spec, suitable for non-pressure pipe and crates): $700–$1,000/ton; standard injection-grade rHDPE: $900–$1,300/ton; food-contact rHDPE (rare, requires hot wash + premium QC): $1,500–$2,200/ton. Virgin HDPE typically sells at $1,200–$1,800/ton depending on global oil prices. rHDPE typically prices 25–40% below virgin equivalent grades.
HDPE 재활용이 이익스러운가요?
Yes — HDPE recycling is one of the most profitable plastic recycling streams. Capital payback typically 3–5 years for 1 ton/h operations with reliable input streams. Profitability factors: input cost ($0–$200/ton from waste suppliers), pellet sales price ($800–$1,500/ton), operating cost ($150–$300/ton for energy, labor, consumables, water). Net margin: $300–$700/ton depending on stream quality. HDPE pipe-to-pipe closed-loop recycling has the highest margins because pipe waste is clean, single-material, and high-volume.
HDPE granulator는 무엇인가요?
An HDPE granulator (also called an HDPE crusher or pipe crusher) is the secondary size-reduction machine in an HDPE recycling line. It takes shredded HDPE chips (40–120 mm) and reduces them to 8–15 mm flakes ready for washing and pelletizing. HDPE granulators use 22–110 kW motors at 400–600 RPM with screen-controlled output. The most common type for HDPE pipe recycling is a wet granulator with water injection for cooling and dust reduction. Capital cost: $25,000–$100,000.
결론
HDPE recycling equipment selection depends on input source (pipes, drums, bottles, mixed), throughput (typically 500–3,000 kg/h), and end-product spec (pipe-grade, injection-grade, food-contact). The 6 equipment categories — shredder, granulator, washing line, dewatering/drying, pelletizing, auxiliary — work in sequence to convert end-of-life HDPE waste into high-value rHDPE pellets. Capital cost for a complete 1 ton/h HDPE recycling line ranges $260,000–$770,000, significantly below equivalent PET lines because HDPE doesn’t require crystallizers or desiccant drying.
Energycle supplies complete HDPE recycling equipment lines and individual machines: HDPE 파이프 쇼더, mobile HDPE shredders, HDPE pipe crushers, HDPE washing lines, 원심 탈수기, 그리고 HDPE pelletizing machines. 재료 유형, 처리량 요구 사항, 원하는 출력 크기를 가진 with your HDPE input source, throughput target, and end-product spec — we’ll recommend the right configuration with detailed quote, line layout, and installation timeline.
