Overview
The internal inlet screen grid is a specialized mechanical filtration device designed for continuous solid-liquid separation in industrial and municipal applications. As primary treatment equipment, it serves as the first line of defense in wastewater treatment plants by intercepting large debris that could damage downstream pumps and processes. Unlike traditional bar screens, the internal inlet design allows for submerged installation within tanks or channels, optimizing space utilization. Modern versions incorporate automated raking mechanisms and self-cleaning features to maintain consistent flow rates while minimizing manual maintenance requirements.
Structure and Working Principle
The core component consists of parallel metal bars (typically 5-20mm thick) welded to supporting frames at precise spacing (usually 3-50mm). The grid assembly is mounted at a 60-75° angle to the flow direction, creating a screening surface where solids are trapped while liquid passes through. Advanced models feature rotating rake systems with teeth that travel along the bars to dislodge collected debris into a hopper. Some designs incorporate spray wash systems for sticky materials. The structural integrity is maintained through heavy-duty side plates and cross supports capable of withstanding hydraulic pressures up to 0.3MPa in demanding applications.
Key Features
Corrosion resistance is paramount, with stainless steel being the preferred material for harsh environments. Many industrial-grade models feature epoxy-coated carbon steel frames for cost-sensitive applications with moderate chemical exposure. Modern units offer smart monitoring capabilities including differential pressure sensors to detect clogging and automated speed adjustment for the rake mechanism. Optional features include integrated compactors for dewatering collected solids and explosion-proof motors for hazardous locations. The modular design allows for field assembly of large units exceeding 3m in width.
Application Areas
Municipal wastewater treatment plants constitute the largest application sector, where these grids protect pumps and prevent clogging in secondary treatment systems. They're equally vital in industrial settings - particularly food processing, paper mills, and chemical plants handling fibrous or bulky byproducts. Specialized versions serve unique roles in aquaculture for intake water filtration and in power plants for cooling water screening. The mining industry utilizes heavy-duty variants with abrasion-resistant coatings to handle slurry flows containing rock fragments and mineral tailings.
Maintenance and Precautions
Routine maintenance involves monthly inspection of bar spacing (tolerance ±1mm), lubrication of moving parts, and checking wear plates on automatic models. Critical signs of wear include bent bars exceeding 5% of the spacing dimension or rake teeth showing >20% material loss. Operators should monitor for unusual vibrations indicating misalignment and ensure proper functioning of limit switches on automated units. In freezing climates, heating elements or air burst systems may be required to prevent ice buildup. Always lock out power before performing manual cleaning or maintenance.
B2B Procurement Guide
Industrial buyers should specify flow capacity (maximum and minimum), required clearance between bars, and materials of construction based on chemical exposure. For automated models, cycle time adjustability and alarm functions should be clearly defined. Lead times typically range 6-12 weeks for custom configurations. Consider total cost of ownership - premium materials like 316L stainless may justify higher upfront costs in corrosive environments. Request performance guarantees for throughput capacity and verify third-party certifications for welding standards and material composition.
Related Manufacturers
- 主营：排水管、桥架管箱、地埋管道、格栅盖板、玻璃钢格栅、玻璃钢树池格栅、地网格板、电缆桥架、玻璃钢桥架、洗车房盖板、排水排污管、玻璃钢管道、大口径管道、排水沟盖板、切割拼接网格、除臭玻璃钢管、桥架电缆线槽、电力电缆保护管、槽式梯式波纹板、耐高温电缆线架、通风排污缠绕管
- 主营：冲孔板、钢格板、钢板网、钢格栅、插接钢格栅、钢格栅板、不锈钢格栅板、热镀锌钢格栅、齿形钢格栅、穿孔板、金属网、筛网、球型立柱、异型钢格板、石笼网、热镀锌钢格板、不锈钢钢格板、球立柱、龟甲网、张拉网、踏步板、齿形钢格板、插接钢格板、扩张网
- 主营：不锈钢格栅板、平台地漏网格
- 主营：玻璃钢水罐、玻璃钢脱硫塔、净化除尘设备、玻璃钢格栅、玻璃钢化粪池
- 主营：沟盖板、钢格板、网格板、格栅板、镀锌格栅、地网格栅、踏步板、钢盖板、钢格盖板、排污防护板、金属楼梯踏板、市政雨水篦子、小区雨水井盖板
- 主营：勾花网、球场围网、球场围栏、污水厂生化池钢格栅、运动场栅栏、篮球场栅栏、体育场围网、篮球场护栏、铁丝网围网、排球场场地、铁丝网防护网、体育场防护网、绿色场地围网、球场地面施工、护栏网围栏网、篮球场地围网
- 主营：钢格板、镀锌沟盖板、排水沟盖板、钢格栅、镀锌钢格栅板、钢格栅盖板、镀锌网格板、踏步板
- 主营：玻璃钢格栅、电缆沟盖板
- 主营：镀锌沟盖板、重型钢格板、排水沟盖板、钢格栅、钢格栅板、金属冲孔网板、不锈钢格栅板、热镀锌钢格板、圆孔冲孔筛网、别墅铸铁围栏、不锈钢冲孔板、外墙装饰冲孔板、对插防滑网格板、过滤筛网、铁艺护栏、隔离护栏网
- 主营：钢格板、钢格踏板、水沟盖板、钢格栅板、镀锌格栅盖板、热镀锌格栅板、楼梯踏步格栅板、楼梯踏步板、光伏走道板、下水道盖板、焊接沟盖板
- 主营：走线槽、电缆管、树篦子、地格栅、玻璃钢格栅、防滑排水格栅、地沟盖板、电缆桥架、布线槽盒、化工管道、排污管道、通风管道、支架槽盒、玻璃钢管道、排污水管道、防火阻燃槽盒、电缆保护槽盒、市政排水管道、排污排水管道、污水池网格板、电力电缆保护管、电线槽防火槽盒、除臭污水纤维管、玻璃钢电缆槽盒
- 主营：踏步板、钢格板定做、排水沟盖板、平台格栅板、镀锌钢格栅板、不锈钢格栅板、排水沟盖格栅板、电厂防滑格栅板、加厚镀锌钢格板、平台镀锌钢格板、检修平台走道板、平台检修走道板
- 主营：钢格板、不锈钢钢格板、镀锌钢格板、钢格栅、格栅板、不锈钢格栅、镀锌钢格栅、钢格栅盖板、格栅盖板、钢格栅板、镀锌格栅板、水沟盖板、沟盖板、钢格板踏步板、平台钢格板、压焊钢格板、齿形钢格板、防滑钢格板、热镀锌钢格板、插接钢格板、复合钢格板、异形钢格板、热浸锌钢格板
- 主营：玻璃钢储罐、不锈钢水箱、玻璃钢脱硫塔、防眩板、标志桩、玻璃钢管道、电缆沟盖板、拉挤型材、玻璃钢出水口保护罩
- 主营：钢格栅、热镀锌钢格栅、钢格栅板、踏步板、平台钢格板、走廊脚踏板
- 主营：石笼网、边坡防护网、体育场围网、玻璃钢格栅、车间隔离网、护栏网、钢丝网片、声屏障
- 主营：沟盖板、隔离网、钢格板、格栅板、钢格栅、格栅盖板、平台板、围栏网、喷漆围网、球场围网、操场围网、低碳扁钢、316不锈钢、平台沟盖、电厂平台、锌钢护栏、花纹盖板、组装围网、球场围栏、雨水篦子、排水盖板、浸塑围网、操场护栏、防滑盖板、运动场围栏
- 主营：玻璃钢电缆桥架、槽式电缆桥架、梯式电缆桥架、玻璃钢格栅、花纹盖板格栅、波纹板桥架、加强电缆桥架、玻璃钢管道、玻璃钢夹砂管道、玻璃钢通风管道、玻璃钢排水管道、专用网格板树篦子、养殖网格板、泵站
- 主营：下水道沟盖板、钢格板、集水坑盖板、钢格栅、观景走道平台钢格栅、异形平台格栅、304不锈钢格栅、工业平台钢格栅、楼梯踏步板、异形钢格板、重型插接格板、钢格板平台、平台踏步板、插接钢格板平台、镀锌喷漆低碳钢板、网格水沟盖板、下水道篦子、复合花纹盖板
- 主营：钢格板、踏步板、沟盖板、钢格栅、玻璃钢格栅、不锈钢水篦子
- 主营：围栏网、防护网、球场围网、镀锌钢格栅板、不锈钢格栅板、运动场围栏、楼梯踏步板、沟盖板、锌钢围栏、钢格板
- 主营：刮泥机、中心传动刮吸泥机、周边传动刮泥机、机械格栅、格栅除污机、内进流网板式格栅机、钢丝绳格栅除污机、转鼓式格栅机、阶梯式格栅除污机、外进水微滤机、内进水微滤机、虹吸式刮泥机、桥式吸砂机、行车式刮泥机、全桥式刮泥机、链条式刮泥机、滚筒式微滤机、纤维转盘过滤器、滤布滤池、转鼓精密过滤器、旋流沉沙器
- 主营：捞毛机、捞渣机、叠螺式污泥脱水机、孔板阶梯格栅、内进流格栅、耙齿格栅、反捞式格栅、转鼓格栅、高精密过滤器
- 主营：撇水器、尼龙耙、除砂机、粗格栅、细格栅、桶格栅、上料机、捞杂机、栏污机、石灰乳、捞砂机、清污机、分离机、撇油机、刮泥机、水装置、输送机、配药机、滗水器、吸泥机、活性炭、排泥机、301配件、离心机、拦污栅
- 主营：刮泥机、加药装置、叠螺机、格栅机、砂水分离器、气浮机、一体化污水处理设备、旋转滤网、螺旋输送机、皮带输送机、带式压滤机、纤维转盘过滤器、磁分离、转鼓精密过滤器、微滤机、生物转盘
- 主营：格栅机、阶梯格栅、网板格栅、阶梯式格栅、不锈钢孔板格栅、除污机
- 主营：FA净水器、滗水器、超滤反渗透、机械格栅、内进流格栅、带式浓缩脱水一体机、叠螺污泥脱水机、多介质过滤器、螺旋输送机、皮带输送机、气浮设备、浅层砂过滤器、吸刮泥机、砂水分离器、生物转盘、石灰料仓、微滤机、纤维转盘过滤器、斜管沉淀器、旋流沉砂池
- 主营：纤维转盘过滤器、转鼓式精密过滤器、三腔式自动加药装置、内进流网板格栅、转鼓式格栅、外进水微滤机、回转式格栅清污机、机械格栅、内进流格栅、干粉投加装置、螺旋砂水分离器、无轴螺旋输送机、加药装置、微滤机、螺旋输送机、喷淋塔、旋流沉砂池、水力筛、滗水器、螺旋压榨机、皮带输送机
- 主营：叠螺机、污泥脱水机、带式压滤机、内进流格栅机、转鼓格栅、格栅机、污泥压滤机、污泥浓缩机、气浮机、气浮设备、溶气气浮设备、螺旋输送机、纤维转盘过滤器、加药装置、转鼓精密过滤器、移动污泥脱水车
- 主营：推流器、调节池、增氧机、机械格栅机、清洗格栅机、细格栅除污机、不锈钢格栅机、搅拌机、推进器、搅拌器、废水处理、预制泵站、搅拌设备、刮吸泥机、浓缩排泥机、潜水轴流泵、污泥回流泵、离心曝气机、喷泉曝气机、行车吸泥机、周边吸泥机、废水稠厚器、皮带输送机、太阳能喷泉、射流曝气机
- 主营：格栅机、细格栅网板、阶梯格栅除污机、粗细除污机、污水处理设备、污水处理捞渣机