Type air floatation precipition machine

1, Properties and Uses
    Belt filter press is my company in the digestion and absorption of foreign advanced technology, based on self-developed a new type of efficient sludge treatment equipment, which has high efficiency, low energy consumption, good dehydration effect, simple structure, easy maintenance, low noise, running smooth, safe, reliable, continuous automatic production advantages. Now widely used in solid-liquid separation project on the petroleum, chemical, coal, metallurgy, building materials, textile, food and water supply and drainage and environmental protection.
    Belt filter press sludge is based on the original belt filter press concentrated on the increase, including sludge thickener concentration section, dewatering section, sludge mixed reaction system, can be directly secondary settling tank sludge (water rate of 99.2-99.6%) was concentrated dehydration, thus eliminating the traditional thickener, saving a lot of investment.
    Belt filter press is a way to process the concentrated (95-98% moisture) material to further dehydration cake effective equipment, with continuous automatic production, equipment installation features low production costs and can switch to a different mesh filter with continuously variable speed, solid-liquid separation to suit different types of materials. The whole structure is reasonable, to prevent water splashing, high precision roll system is installed, the number of small detuning, extending the filter belt, lifetime bearings and pneumatic components, the main drive motor variable speed, increasing the speed range, running smooth, front flush water unit increased cleaning brush, rinse the filter with improved effect, reducing the wash water, sludge dewatering rate increases.
2. Working principle
   Belt filter press throughout the process can be divided into three basic stages: sludge flocculation, gravity filter press dewatering, dewatering.
2.1 sludge flocculation
   Before sludge dewatering process must go through flocculation, flocculation refers to a coagulant (ie, a polymer - polymer electrolyte) of the suspension was pretreated, flocculants and sludge mixing, the suspension system The solid particles are bonded to produce agglomeration, the solid and liquid phases separate. Flocculation sludge is in the flocculation reactor, the sludge retention time of about 1-3min in the flocculation reactor.
2.2 gravity dehydration
   By flocculation of the sludge moisture content of 99.3% by the concentrator gravity dehydration, sludge moisture rate of 95-98%, in order to reduce the sludge before squeezing liquidity, must emerge more free water, gravity dewatering zone is to achieve this a function of sludge in the filter belt from external forces, filter sludge load running segment has an upper angle, friction coefficient and filter with mud and water are not the same, mud drag up row with the filter with water down , sludge accumulation process have a relatively prolonged gravitational dewatering time is conducive to free water from coming out. Sludge and then through a reverse anti-pu to squeeze new belt, before entering the filter with two clamping press, belt filter in a single random run, its role is to evacuate the sludge evenly distributed in the surface of the filter belt so that further dehydration.
2.3 dewatering
   Gravity dewatering sludge, with the movement of the wedge into the belt filter press filter belt between the upper and lower sections, the compression dehydration to obtain, but also a part of the sludge off the free water surface, and then formed into the roll of seven "S "shaped press section, due to the sludge filter with the change of direction with a plurality of curved stick between the shearing force to squeeze inside the free water.
3 main institutions and characteristics:
3.1 major institutions
3.1.1 The main drive belt filter press
    In order to meet the requirements of a belt filter press using different speed, gear by the speed reducer, drive shaft and motor. Reducer with shaft-mounted mechanical CVT. The driving speed of the drive by electronic control box PLC adjusted to achieve the speed can be adjusted with the purpose of the filter; motor with continuously variable transmission, drives with overload and overheating protection, motor protection class IP55, insulation class F. Two main drive roller, exterior coated with neoprene, increasing the friction coefficient between the belts and rollers of. The main drive roller driven filter belt movement velocity filter with variable speed at 1.5-6.0m / min range bearing life should be more than 10,0000 hours. Drives with overload and overheating protection, motor protection rating of IP55, F class insulation.
3.1.2 filter belt tensioner and filter with automatic correction device
    Filter belt press filter on the filter belt tensioner and belt correction device controlled by a pneumatic system. Up and down the belts are tight suspension relies on two cylinders to complete. When the filter needs to be adjusted with the required tension can be regulation and control filter belt tensioner cylinder valve, so that it is set up tight cylinder with a pressure filter belt tensioner. On both sides of the lower filter belt with a motorized valve, when the filter belt run offset normal position When 15mm, will touch valve, pneumatic valve is turned on, so that corrective cylinder drive roller offset correction angle, change the direction and size of the frictional component, in the role of correcting rolls back into place so that the filter band. When the filter with deviation greater than 25mm and have special factors make the filter with pneumatic control failure, squeeze the stick side across the filter with proximity switches can temporarily stop and alarm.
3.1.3 filter with flushing device
   Belt filter press in the work process, the belts should run continuously to maintain the filter with clean, avoid material into the filter with the gap caused by blockage in the return section of the upper and lower filter belt and concentrated belt, a wash means, including flush tanks, pipes, water pipes and valves, special replaceable nozzle, pipe built with a brush. Flushing device has a good seal, ease of maintenance and cleaning, rinse water without splashing wet cake, rinse the nozzle with automatic cleaning device. When the belts run through the flush tank, filter belts are clean, ready for the next cycle of the sludge press.
3.1.4 filter belt
   Filter filter are used with polyester monofilament net, its strength> 600N / cm, life expectancy up to 10,000 hours, heat setting, the filter with the non-joint, has a tensile strength, resistance to twists and turns, acid and alkali resistance temperature changes durable. Concentrated effect, make sludge is concentrated to 95-98%, the filter with easy to wash, as well as the subsequent dehydration reduces the load.
3.1.5 into the mud pumps and dosing pumps.
   Into the mud and dosing pumps use a single screw with a motorized volume adjustment device that adjusts the range of 45-100%; trouble-free pump operation time accumulated more than 20,000h. Strongly bonded rubber stator and housing, which face without defect seams, pores and cracks. A stator working life is not less than 40,000 hours. Bearing temperature rise should not exceed the ambient temperature 35 ℃, the limiting temperature should not exceed 80 ℃. Bearing mechanical or packing seal. Pump noise level should not exceed 70dB (A). Housing material is cast iron pumps, rotating parts made of stainless steel, corrosion resistant alloy steel screw material, the stator material is hard and wear resistant rubber, the motor for the motor, the motor should have current protection, motor protection class IP55 , insulation class F.
3.1.6 Automatic dosing flocculant preparation system
   Flocculant modulation stock concentration of 0.5% to 1%, 0.1% flocculant concentration, flocculant type should be used in domestic polymer powder or liquid flocculants. Perfect instrumentation system complete, accurate indication. Pipeline without leakage. Dosing pump operating conditions should be satisfied PH3 ~ 12, normal, medium viscosity <5500cps, flow regulating, medium concentration of 0.1% to 0.6% of the high-molecular flocculant. Motor protection class ip55, f-level insulation. <P = "">
3.2 Design features:
Concentrated gravity dehydration long paragraph 3.2.1, filter sludge load on the running section has a dip, with the filter sludge accumulation process with a drag to have a prolonged time gravity dehydration, sludge after two reverse anti-pu to squeeze new belt. improve the efficiency of dehydration.
3.2.2 The use of automatic flushing flushing faucets automatic voltage regulator, with good sealing, easy maintenance and cleaning, to meet the needs of the cleaning cloth.
3.2.3 Two filter with holding press section has a few V-care stick, increasing the sludge treatment capacity, and a corresponding reduction in the chance with a deviation of the filter, with self-correction features.
3.2.4 Two-way pneumatic correction device, make correction more direct, structural stability, long service life.
3.2.5 cloth thickener tank equipped with staggered comb rake mud, mud cloth more uniform so conducive to enhancing the efficiency of dehydration.
4, the control system
   Sludge dewatering PLC system that can run all the equipment to realize the linkage, stop, fault alarm, indication, and can their working conditions and failures
And other signals transmitted to the display, including hardware integration and software programming PLC systems sludge control, with the following main control functions:
4.1 Linkage start filter full set of equipment;
4.2 Linkage stop filter full set of equipment;
4.3 Contact PLC electrical control system has the following features automatic protection
   With polarizing filter alarm limit position, stop;
   Filter belt tensioning control failure alarm, parking;
   Washing the filter with insufficient water pressure alarm, parking;
   Flocculant dosing control failure alarm, parking;
   Related equipment failure alarm, parking;
   Overload alarm, parking;
   Insufficient air pressure alarm, parking;
   External signal a shutdown (emergency stop);
4.4 Safety Interlock
They live / test operation mode and in manual and automatic mode, the device can effectively guarantee safe operation.
4.5 Step interlock
Step interlock interlock for all programs is a particular means that they can operate effectively in automatic or manual mode.
4.6 PLC system will automatically monitor air pressure, low pressure on the filter belt tension can not guarantee the normal operation of the filter press.
Recoil water pressure is less than the predetermined value, PLC system will automatically issue commands to the system monitor and adjust operating parameters.
5. Installation and commissioning:
5.1 installation:
Installation should be in accordance with the installation drawing, interior design foundation and affiliated facilities. Check civil meets the design requirements. When installed, adjust the horn, the device in the horizontal plane, the horn and civil embedded steel welding firm, will host the fixed platen, Flocculator discharge port and the material inlet position aligned and leveled, then Its legs and civil embedded steel welding firm.
5.2 Debugging
  Equipment required after installation is complete, according to the following requirements and steps for debugging:
5.2.1 All equipment and piping cleaned, they can not leave any foreign body, check for loose joints, lubricants and lubricating moving parts of the injection of the main drive gear case. Promptly eliminate the problem
5.2.2 lubricator to lubricate pneumatic systems, pneumatic components ensure action parts are fully lubricated cylinder rod exposed parts butter or rust oil. Start the compressor, the compressor starts the pressure was adjusted to 0.8MPa, pneumatic before tensioning cylinder will vent filter with raised roller center, checking the pneumatic piping for leaks and repaired in a timely manner, according to the pneumatic schematic detect tension of offset cylinder and cylinder working status is consistent with the design and tensioning cylinder pressure adjusted 0.4-0.6MPa, correction cylinder pressure was adjusted to 0.8MPa. Manual adjustment concentrated segment filter belt tensioner degrees, so that the tension of the press section of the belts considerably.
5.2.3 Start a filter drive gear, observe the filter belt deflection is operating within its design limits, the gear unit is gradually adjusted to the slowest speed, medium speed, fastest, and observe whether the belts run smoothly up and down the filter mesh belt machine band are synchronized. Adjusting with moderate speed, no-load running 2 hours.
5.2.4 Open the flushing water valve, observe whether there Mifengbuyan leaking, if timely repair.
5.2.5 The good flocculation sludge into the thickener by the Flocculator observed with the machine is functioning properly, by changing the filter, lower tension force filter belt tensioner cylinder speed, change into the mud, change thereby adjusting the sludge to achieve the best effect and extrusion processing amount.
5.2.6 regulate the work of the agencies properly, the device can be put into use.
6. Maintenance:
6.1 regularly to each bearing, tensioner slide grease (about a month) for six months to conduct a little maintenance. Once a year overhaul. Special attention replacement of wearing parts (especially of offset nylon wheel) to ensure that the overall performance of the device is running in good condition.
6.2 timely and regular basis to the pneumatic system lubricating oil mist filter in addition to water, to ensure the operation of pneumatic components parts are fully lubricated cylinder rod exposed parts butter or rust oil.
6.3 The operator is prohibited on the host running the debris thrown into the rotation of the filter band, non-operating personnel at the inside of the host running his hand into the rotating filter belt and other moving parts.
6.4 maintaining enter sludge belt filter press before flocculation in good condition. Often get through the mud pipeline flocculation, sedimentation sludge shall not affect the mud. When put into the mud down a long tube and rinse the condenser vent in the reservoir sludge.
6.5 monthly irrigation tube removed, remove scale cleaning nozzles.