Operation, Maintenance and Technical Development of TQ-M Mushroom-type Extraction Equipment

The TQ-M mushroom-type extraction equipment is a standardized process device widely applied in pharmaceutical manufacturing, natural product processing, food deep processing and fine chemical industries. Adopting a mushroom-shaped cavity structure with a wider upper section and a narrower lower section, the equipment features an expanded upper cavity that provides sufficient buffering space for material boiling, effectively restraining boiling surge, foam entrainment and material loss during production. The compact lower cylinder integrates a concentrated jacket heat exchange area with stable heat exchange efficiency, which is adaptable to various process conditions including water extraction, alcohol extraction, thermal reflux extraction, forced circulation dynamic extraction, aromatic oil rectification and organic solvent recovery, delivering excellent process adaptability. The equipment consists of a main tank, top defoaming mechanism, tubular condenser, cooler, oil-water separation assembly, bottom double-layer filtration device, pneumatic slag discharge structure, circulating conveying system, CIP in-situ cleaning system and process detection instruments. Fabricated with polished stainless steel, the tank cavity has no sanitary dead corners and complies with industrial clean production specifications, supporting both intermittent single-unit production and collaborative operation of multi-unit linked production lines.

The operational stability, process accuracy and service life of the equipment rely on standardized and systematic maintenance management. Based on the structural characteristics, operating conditions and shutdown status of the equipment, maintenance work is divided into three levels: daily operational maintenance, periodic in-depth overhaul and long-term shutdown preservation. Targeted preventive management of key vulnerable structures can effectively eliminate equipment failures and ensure continuous production and stable process performance.

Daily operational maintenance is a routine procedure after each production batch, serving as the fundamental guarantee for maintaining equipment cleanliness and reducing failure risks. After discharging materials, the built-in rotary cleaning device shall be activated to fully spray and clean the inner tank wall, feeding port, observation mirror, pipeline connectors and other areas to remove residual materials. The bottom double-layer filtration assembly shall be disassembled to clean herbal residues and colloidal sediments attached to filter plates and screens, preventing pore blockage and metal corrosion caused by dried materials and ensuring unobstructed liquid flow. Special attention shall be paid to the sealing system of the slag discharge door; residual impurities in flange gaps and locking structure surfaces shall be cleaned, and the integrity of sealing components shall be inspected to avoid scratches, deformation and material adhesion. Hard tools are prohibited from contacting sealing structures to prevent leakage caused by sealing failure. Auxiliary equipment including condensers, coolers and defoamers shall be reversely flushed to remove pipeline and filter dirt, and accumulated media in oil-water separators shall be drained to avoid cavity corrosion and pipeline blockage due to long-term static storage. Finally, pneumatic pipelines, cylinder components, pressure and temperature sensors shall be inspected to eliminate pipeline aging, air leakage and instrument zero offset, and moisture-proof protection shall be implemented for electrical terminals.

Periodic in-depth overhaul includes monthly maintenance and quarterly overhaul, which are critical to long-term stable equipment operation. Monthly maintenance focuses on the heat exchange system, power conveying system and filtration system. The jacket interior shall be regularly flushed with softened water to remove scale accumulation that may reduce heat exchange efficiency and prolong production cycles. Acid cleaning and descaling shall be performed periodically according to water quality conditions, and steam traps shall be inspected to avoid pipeline water hammer and abnormal equipment vibration. The operating status of circulating delivery pumps shall be monitored to check for mechanical seal leakage and bearing overheating, and lubricants shall be replenished for transmission components. All flange and clamp connections shall be fastened to prevent pipeline corrosion and medium leakage. The filtration assembly shall be completely disassembled and cleaned; deformed, damaged or unreparable filter screens shall be replaced in a timely manner, and hinge rotating parts shall be maintained to ensure flexible opening and closing of the filtration assembly.

Quarterly systematic overhaul covers comprehensive disassembly, inspection, component replacement and parameter calibration. Sealing parts at the slag discharge door, feeding port and observation mirror shall be fully inspected and replaced regularly. Long-term exposure to alternating cold and heat and organic solvent immersion may cause hardening, swelling and aging of sealing components, and defective operation is strictly prohibited. Pneumatic actuators including cylinders, locking rollers and piston rods shall be disassembled and cleaned of dust and rust. The working pressure consistency of multiple cylinders shall be calibrated to ensure uniform locking force and tight sealing of the slag discharge door. Safety interlock mechanisms shall be verified for reliable protection to prevent safety accidents caused by misoperation. Professional metering institutions shall calibrate pressure and temperature detection instruments to ensure accurate process parameter collection. Electrical control circuits shall be systematically sorted out, and wiring terminals shall be reinforced with moisture-proof and explosion-proof treatments to adapt to complex industrial environments. Non-destructive testing shall be conducted on stress-concentrated areas such as tank welds, discharge ports and heat exchange cylinders to detect micro cracks and local corrosion, and polishing, welding and passivation treatments shall be performed to eliminate potential safety hazards.

Standardized preservation maintenance is required for equipment idle for more than fifteen days. After shutdown, the tank, pipelines and heat exchange components shall be fully flushed with pure water and dried with clean hot air to completely eliminate residual water, preventing microbial growth and stainless steel pitting corrosion. The slag discharge door shall be kept slightly closed to avoid permanent deformation of sealing parts caused by long-term compression. Motors, cylinders and other power components shall be dust-proof sealed with air supply ports blocked. For outdoor installed equipment, thermal insulation layers and outer protective structures shall be covered for waterproof protection. Before restarting production, complete in-situ cleaning and pure steam sterilization shall be carried out, and production can only resume after passing cleanliness inspection.

A preventive fault diagnosis mechanism shall be established for daily equipment operation to address common failures in a targeted manner. Abnormally low heating rate is mainly caused by jacket scale accumulation, steam trap failure or blocked steam distribution pipelines, which requires regular descaling and accessory maintenance. Reduced liquid discharge is primarily attributed to filter screen blockage; residues shall be cleaned by softening immersion instead of high-pressure flushing to avoid structural damage. Leakage and air leakage of the slag discharge door result from unstable air supply pressure, locking mechanism jamming or damaged sealing parts, which require timely maintenance and rectification. Forcing compression to cover up equipment defects is not allowed.

With the intelligent and low-carbon transformation of the manufacturing industry, higher standards have been raised for the stability, energy consumption control, process accuracy and cleanliness level of extraction equipment. The technical iteration of TQ-M mushroom-type extraction equipment mainly focuses on six directions: intelligent digital control, energy-saving structural optimization, high-cleanliness process adaptation, modular flexible design, green environmental transformation and material upgrading.

Intelligent digital upgrading is the core trend of equipment technical iteration. Traditional equipment relies on manual operation and manual parameter recording with low automation and poor data traceability. The upgraded equipment is equipped with an integrated programmable control system to realize full-process automatic programmed operation including heating, extraction, reflux, solvent replenishment, slag discharge, cleaning and sterilization. Supported by IoT data acquisition units, it can real-timely collect core operating data such as temperature, pressure, medium flow and energy consumption, and automatically generate production batch reports. It also realizes predictive maintenance through early warning of potential faults including scale accumulation, abnormal air pressure and sealing failure, effectively reducing unplanned shutdown frequency. Equipped with an online visual monitoring module replacing traditional manual tank opening inspection, the system real-timely monitors internal material reaction and boiling status, improving process control accuracy and avoiding cleanliness pollution risks caused by manual operation.

Heat exchange structure optimization and waste heat recovery are key directions for equipment energy conservation. Traditional equipment suffers from high steam energy consumption and waste of condensation waste heat. The upgraded equipment is equipped with a condensed water waste heat recovery loop, which recycles high-temperature condensed water generated during production for material preheating and cleaning water heating, significantly reducing steam consumption. Optimized zonal heat exchange structure and upgraded jacket flow guide design improve overall heat exchange uniformity, avoid degradation of effective components caused by local overheating and enhance extraction process stability. For special processes such as aromatic oil extraction, a high-low temperature cascade condensation structure is adopted to improve the recovery rate of functional components, reduce organic solvent volatilization loss, and achieve dual improvement of process quality and energy consumption reduction.

The equipment’s cleanliness process adaptability is continuously optimized to meet high-cleanliness production scenarios such as sterile preparations and high-end functional extracts. Upgraded tank surface treatment technology reduces inner wall roughness and minimizes material adhesion and scaling. The cleaning and sterilization system supports automatic switching of multiple working conditions, realizing programmed full-process operations including acid-base cleaning, hot water flushing, pure water purification and steam sterilization, which meets the specifications of high-end biomanufacturing and sterile production. The filtration system is upgraded with high-precision modular sintered filter screens replacing traditional simple screens, improving solid-liquid separation accuracy, adapting to low-temperature fine extraction processes and expanding the equipment’s process applicability.

Modular flexible structural design is an important upgrading direction for multi-scenario production adaptation. Traditional equipment features fixed structure and single function with poor adaptability. The new-generation equipment adopts standardized connecting interfaces and modular split structures, allowing optional installation of functional modules such as dynamic stirring, ultrasonic assisted extraction and microwave enhanced extraction according to process requirements, realizing multi-process switching for single equipment. The standardized design of supporting structures and pipeline interfaces enables flexible adaptation to small-batch single-unit production and multi-tank linked continuous production lines, conforming to the industry’s characteristics of multi-variety and flexible production, reducing production line transformation costs and improving universal adaptability.

The green low-carbon and environmental protection performance of the equipment has been continuously improved to meet the requirements of industrial clean production. For organic solvent extraction processes, the closed collection system is optimized with closed pipelines and condensation recovery devices installed at volatile points such as breathing ports and slag discharge ports to control unorganized emission of volatile organic compounds. Upgraded high-density thermal insulation materials reduce surface heat dissipation and improve heat energy utilization efficiency. Optimized pneumatic air supply systems and power drive systems equipped with energy-saving pressure stabilizing valves and high-efficiency energy-saving motors stabilize operating conditions and reduce long-term power and energy consumption, complying with green manufacturing standards.

Equipment materials and corrosion resistance are continuously upgraded. For harsh working conditions with corrosive media and strong polar solvents, special material configurations such as titanium alloy lining and composite alloy tanks are available on the basis of conventional 316L stainless steel, effectively improving corrosion resistance and extending equipment service life. Sealing components adopt modified composite PTFE materials with excellent high and low temperature resistance, solvent resistance and aging resistance, which extend component replacement cycles and reduce long-term operation and spare part costs.

In conclusion, with its stable structural design and excellent process adaptability, the TQ-M mushroom-type extraction equipment maintains stable application value in natural product extraction and fine processing. Its operational efficiency, process stability and service life are highly dependent on standardized and refined operation and maintenance management. Standardized management of core vulnerable parts including sealing structures, heat exchange systems, filtration components and pneumatic mechanisms is the core guarantee for long-term stable operation. Against the background of intelligent manufacturing and green low-carbon development, this type of equipment will continue technical iteration through digital empowerment, energy-saving structure optimization, cleanliness upgrading and modular transformation, evolving from traditional fixed process equipment into integrated, intelligent and green standardized process units to adapt to the refined, high-end and flexible production development needs of various industries.