Roots Blower for Leather-Tanning Tank Aeration & Waste-gas Deodorization | Shangu (Mingtian Machinery) Complete Solution

In leather-tanning production lines, aeration-agitation for tanning, liming and deliming tanks, together with odorous waste-gas collection and bio-deodorization treatment for hair-removal and tanning workshops, are critical links to guarantee stable production and environmental compliance. Tanning workshops feature harsh operating conditions with hydrogen sulfide, ammonia fumes, trace acid-alkali corrosive mist, and leather-particle dust. Ordinary standard blowers easily suffer impeller corrosion, seal failure and filter blockage. Once blower shutdown occurs, incomplete tanning reaction downgrades finished-leather quality; meanwhile waste-gas-treatment failure will trigger exhaust-emission non-compliance, causing dual losses in both production and environmental protection.

Tri-lobe Roots blowers belong to positive-displacement air-supply equipment, delivering stable airflow with low sensitivity to pipe back-pressure fluctuation. They can supply steady process air for tanning-tank oxidation-agitation to realize uniform and sufficient tanning reaction. They can also provide process air for bio-trickling filter & scrubber deodorization systems, or work under vacuum mode to extract odorous gas from tanning workshops. Roots blowers serve as core power equipment for leather-tanning plant production and waste-gas-odor-removal projects.

Shandong Mingtian Machinery Group under brand Shangu is a national-level Specialized, Refined, Differential & Innovative “Little-Giant” enterprise. Supported by full-series tri-lobe Roots blower portfolio complying with Chinese mechanical, explosion-protection and environmental-protection standards, we undertake new-build & retrofitting domestic tanning-plant projects as well as overseas complete-set leather-equipment export orders. We deliver integrated solutions including blower selection, anti-corrosion / explosion-proof customization, full-accessory packages and working-condition calculation for leather-tanning applications.

1. Applicable Product Standards

Valid Chinese Domestic Standards

1. JB/T 8941.1-2014 General-purpose Roots blowers — Part 1: Technical specifications (Current valid) Specifies overall material requirements, vibration limits and intake-medium requirements: maximum intake temperature ≤45 °C; solid-particle content of intake air ≤100 mg/m³. Standard cast-iron blowers cannot be directly deployed in tanning workshops filled with hydrogen-sulfide, ammonia mist and leather dust. Custom upgrades such as high-efficiency corrosion-resistant intake filtration, anti-corrosion coating and special mechanical seals are mandatory.
2. JB/T 8941.2-2014 General-purpose Roots blowers — Part 2: Performance test methods (Current valid) Factory-test benchmark for airflow, shaft-power and matched-motor-power verification. All catalogue performance data of Mingtian are obtained under standard intake conditions: 20 °C, absolute pressure 101.325 kPa, relative humidity 65%. Marked Qs in datasheets refers to inlet flow under this reference condition.

Important site note: Tanning workshops keep high-humidity all-year-round with elevated summer ambient temperature. Some plants are located on plateaus. Never directly adopt catalogue Qs for model-selection; flow-pressure correction according to actual intake temperature, medium composition and altitude is mandatory.

1. HJ/T 251-2006 Technical requirement for environmental-protection product — Roots blower Special environmental-protection-industry standard for blowers used in waste-gas treatment. It requires minimum 6000 hours cumulative trouble-free running time, and defines specifications for noise, sealing and protection grade for acceptance of tanning-plant deodorization-system equipment.
2. GB/T 2888-2008 Methods of noise measurement for fans and Roots blowers Official noise-measurement standard. Tanning workshops and waste-gas-treatment stations are often adjacent to office zones; complete silencer packages shall be applied to keep noise output compliant.
3. GB 28381-2012 Limited values of energy efficiency and energy-efficiency grades for blowers Mandatory energy-efficiency regulation. Tanning-tank aeration and deodorization systems mostly run 24-hours non-stop. Energy-efficiency directly determines long-term electricity-operation costs for tanning mills.
4. GB 3836.1-2021 Explosive atmospheres — Part 1: General requirements for equipment Mandatory explosion-proof standard for finishing sections with organic-solvent hazards in tanning plants. Motors, electrical accessories, coupling guards and equipotential bonding shall meet required explosion-proof grades to eliminate ignition risks.

Important note on international-standard equivalence: The test procedure of JB/T 8941.2-2014 refers to ISO 1217 positive-displacement compressors acceptance-test standard, but is NOT equivalent. Domestic Chinese test reports cannot directly replace ISO-1217-compliant reports for overseas projects. For exported leather-industry projects, performance recalculation shall be conducted according to local altitude, workshop temperature and waste-gas composition. Catalogue Qs parameters shall NOT be used directly.

Critical Unit Conversion (For domestic tanning-mill & overseas export projects, built-in our product catalogue)

Definition: Qs = catalogue-listed inlet flow (m³/min) under standard intake state. Overseas leather-industry clients commonly use CFM for flow; pressure units include kPa, kgf/cm², PSI and mmHg.

1. Flow conversion: 1 m^3/min = 35.3147 CFM
2. Pressure conversion: 9.8kPa = 0.1 kgf/cm^2 = 73.5mmHg = 1.422PSI
3. Flow conversion from reference-state (0 °C) to standard-intake-state (20 °C): Qs = Qn × 1.0732

✨ Practical industry pitfalls (rarely published online):

1. Mis-selection merely based on tank volume or nominal deodorizer airflow: Many tanning-mill engineers size blowers only by tank capacity or name-plate airflow of deodorization equipment, ignoring total system resistance generated by pipe elbows, diffuser plates, scrubber packing and filter cartridges. 10-15 % safety margin for airflow-pressure must be reserved. As filter media and diffuser plates get fouled in service, rising system resistance will cause insufficient tanning-tank aeration and under-capacity deodorization, leading to exhaust non-compliance.
2. Seal-failure hazard from condensed ammonia & hydrogen-sulfide: Corrosive mist inside tanning workshops cools down and condenses inside blower casing. Ordinary oil-lubricated shaft seals will be diluted and corroded by condensate, resulting in medium leakage. Simple paint anti-corrosion cannot solve this issue. Double-face mechanical seals with optional nitrogen-purge protection shall be adopted. A large proportion of field blower failures originate from improper seal selection instead of main-unit quality defects.
3. Easily-ignored leather-dust intake-filtration risk: Hair-removal processes produce fine leather particles and collagen dust. Simple coarse screens get clogged rapidly, triggering insufficient intake, over-heating and overload. Large-dust-holding-capacity intake filters are required with periodic cartridge maintenance. Many blower shutdown incidents are caused by insufficient filter configuration.
4. Medium back-flow risk at shutdown: When aeration pipelines for tanning tanks or vacuum waste-gas-collection pipelines stop running, corrosive mist and sewage droplets may flow backward into blower units. Blow-off valves and check valves cannot be omitted. A great number of blower damages in tanning factories are caused by process-medium back-flow, not inherent quality defects.
5. Airflow attenuation at high altitude: For tanning mills located on plateaus, actual blower output airflow declines with lower atmospheric pressure. Working-condition correction is mandatory. Direct adoption of plain-land catalogue parameters will result in insufficient tanning-tank dissolved-oxygen and under-rated deodorization airflow.

2. Working-condition Challenges & Customer Key Concerns for Leather-Tanning Plants

Typical application scenarios include aeration-agitation for tanning / liming tanks, vacuum extraction of odorous gas from tanning workshops, bio-deodorization-tower process air supply, biochemical-pool aeration for comprehensive tanning-plant wastewater. Beyond procurement price, leather-manufacturing buyers focus on the practical requirements listed below:

1. 24-hour continuous-operation reliability: Tanning-production and waste-gas-deodorization lines run non-stop year-round. Impeller high-precision dynamic balancing; unit-vibration complies with JB/T 8941.1-2014 limits, minimise unplanned shutdown and avoid production suspension & environmental-non-compliance penalties.
2. Resistance against corrosion & leather dust: Workshops contain hydrogen-sulfide, ammonia fumes and leather dust. Large-capacity intake-filter system is required; optional anti-corrosion coating, 304 / 316L stainless-steel wetted-parts, double-face mechanical seals plus nitrogen-purge sealing structure for corrosive-vapour conditions.
3. Sufficient performance safety margin: Compensate pipeline loss and resistance rise caused by fouled filter media and packing; reserve 10-15 % airflow-pressure safety margin to guarantee uniform tanning-tank aeration and stable deodorization airflow.
4. Adjustable airflow capacity: Variable-frequency-drive compatible. Dynamically adjust aeration output according to tanning-process phases and real-time waste-gas concentration to balance process performance and power-saving.
5. Workshop noise-control: Complete silencer packages for tanning workshops and waste-gas-treatment stations near office zones.
6. Complete accessory packages: Large-capacity corrosion-resistant air filter, inlet-outlet silencers, safety valves, check valves, blow-off valves, flexible expansion joints, PLC VFD control cabinet; full explosion-proof electrical kits for hazardous-area sites, to reduce secondary-integration workload for tanning-plant owners.
7. Convenient maintenance: Universal spare-parts with short delivery lead-time for easy on-site servicing by in-plant maintenance crews.
8. Custom-building capability: Anti-corrosion coating, stainless-steel wetted-parts, mechanical-seal nitrogen-purge protection, explosion-proof motor; custom base dimension support for retrofitting of legacy tanning-plant equipment.
9. Export-oriented requirements: Imperial-unit datasheets (CFM / PSI), English catalogues, special-voltage motors, performance recalculation complying with ISO working-condition requirements for global leather-industry EPC suppliers.

3. Mingtian Shangu Model Matching for Leather-Tanning-Tank Aeration & Waste-gas Deodorization Projects

Shangu product portfolio includes MTS, RSR, MTR-V vacuum pumps, MTRF / MTRG heavy-duty Roots blowers. Performance range: flow 0.6-1057 m³/min, pressure rise 9.8-196 kPa. Our product series cover small-scale tanning workshops, medium-size tanning mills up to large-scale integrated leather-manufacturing-group facilities.

Series	Working Pressure	Flow Range	Typical Leather-Tanning-Industry Applications
MTS 3-lobed Roots Blower (Belt-drive)	9.8-98 kPa positive pressure	1.1-60 m³/min	Workhorse model for small-&-medium-size tanning mills. Aeration-agitation for small-volume tanning / liming tanks; air supply for compact bio-deodorization towers; retrofitting for old-tanning-plant renovation projects. Compact footprint. Optional intelligent VFD control cabinet, mechanical-seal, anti-corrosion & explosion-proof configuration for intermittent or 24-h continuous-production scenarios.
RSR 3-lobed Roots Blower (Belt-drive / Direct-coupling)	9.8-98 kPa positive pressure	0.6-184 m³/min	General-purpose workhorse for medium-&-large-size tanning mills. Multi-parallel tanning-tank aeration-agitation; process air supply for bio-deodorization & scrubber systems; biochemical aeration for tanning-plant wastewater. High spare-part compatibility. Full-set silencer & safety-piping accessories available. Designed for long-time continuous-duty production.
MTR-V Roots Vacuum Pump (Negative-pressure series)	-9.8 ~ -49 kPa negative pressure	1-420 m³/min	Vacuum extraction of odorous fumes from tanning & hair-removal workshops. Must equip large-capacity high-efficiency corrosion-resistant intake-filter to block leather particles and corrosive condensate impurities entering main unit.
MTRF / MTRG Heavy-duty Roots Blower	9.8-147 kPa positive pressure	40-1057 m³/min	Large-scale integrated leather-manufacturing groups; aeration for multi-group large-volume tanning tanks, air supply for large-capacity waste-gas-deodorization systems. Water-cooled construction for heavy-duty long-time high-pressure running. Custom options include stainless-steel wetted-parts, mechanical-seal plus nitrogen-purge protection and anti-corrosion coating for high-humidity corrosive tanning-workshop environments.

Model-selection tips

1. For small-&-medium-size tanning mills with small-volume tanning tanks and compact deodorization systems: Prioritize MTS or small-frame RSR models. Upgrade large-capacity corrosion-resistant intake-filter and install check & blow-off valves. Mechanical-seal construction is required if hydrogen-sulfide / ammonia fumes exist.
2. For medium-&-large-size tanning mills with multi-parallel tanning-tank aeration and bio-deodorization facilities: Adopt RSR series. VFD control system is recommended to adjust airflow dynamically according to tanning-cycle and real-time waste-gas load.
3. For vacuum-extraction of workshop odorous waste-gas: Select MTR-V vacuum pump with reinforced intake-filter configuration; check-valve omission shall be avoided.
4. For large-scale leather plants and high-throughput deodorization projects: Choose MTRF / MTRG heavy-duty models. Calculate full resistance of pipelines plus scrubber packing and filter cartridges and reserve sufficient airflow-pressure margin. Upgrade anti-corrosion / stainless-steel wetted-parts and nitrogen-purge sealing for media containing hydrogen-sulfide and ammonia.
5. Deploy full-set explosion-proof configuration for motors and all electrical accessories in finishing workshops with organic-solvent hazards. Working-condition performance correction is required for high-altitude plant sites.

4. Core Advantages of Mingtian Shangu Products

1. Strong R&D & Manufacturing Capacity: National-level High-tech Enterprise & Specialized-Refined-Differentiated-Innovative Little-Giant Enterprise. Technical team includes professor-level senior engineers, PHD and master-degree specialists. Equipped with 5-axis machining centers and high-speed dynamic-balancing test benches. Every impeller undergoes high-precision dynamic balancing. Unit-vibration performance exceeds the limit value specified in JB/T 8941.1-2014, well-suited for 24-hour continuous-running tanning-plant production.
2. Credible Performance Data: Each unit passes factory performance test complying with JB/T 8941.2-2014. We offer professional flow-pressure correction for corrosive high-humidity tanning-workshop conditions, high-altitude sites and overseas projects. Eliminate wrong-model-selection risks caused by directly applying air-condition catalogue parameters; prevent insufficient aeration and under-rated deodorization performance.
3. Flexible Configuration & Complete Delivery: Belt-drive or direct-coupling options. Available accessories: inlet / outlet silencers, large-capacity corrosion-resistant air filters, safety valves, check valves, blow-off valves, flexible expansion joints, PLC intelligent control cabinets (VFD, no-load startup & overload protection). Custom options: anti-corrosion coating, stainless-steel wetted-parts, mechanical-seal plus nitrogen-purge protection, explosion-proof motor. Custom base dimension support for retrofitting existing old tanning-plant equipment.
4. Dual support for domestic tanning-mill & export EPC orders: Chinese / English catalogues, dual-set datasheets in m³/min & CFM. Custom special-voltage motors are offered for domestic and global leather-industry EPC contractors.
5. Professional Technical Service & Spare-part Support: In-house spare-parts warehouse for fast lead-time. Send us project parameters: process purpose (tanning-tank aeration / vacuum waste-gas extraction / deodorization-tower air supply), medium composition, design airflow, working pressure, total pipeline length, elbow quantity, explosion-proof requirement, site altitude. We will deliver custom-tailored blower proposal for you.

5. Contact Information

For full PDF catalogue, performance datasheets and custom-tailored solution for leather-tanning-tank aeration & waste-gas-deodorization projects, please feel free to reach us:

📞 WhatsApp / Wechat: +86 187 5316 3090
📧 Email: [email protected]
📞 Phone / WhatsApp: +86 187 6611 7068
📧 Email: [email protected] | [email protected]
🌐 Official Website: https://www.mtrootsblower.com

💡 Recommended project-information for model-selection submission: Process purpose (tanning-tank aeration /
vacuum waste-gas extraction /
deodorization-tower air supply), medium composition, design airflow, working pressure, total pipeline length, elbow quantity, presence of H₂S/
NH₃ corrosive fumes, explosion-proof requirement, site altitude, VFD requirement. Accurate inputs help avoid risks such as insufficient aeration, waste-gas-treatment non-compliance and unit damage caused by corrosive-medium back-flow.