(1) Ready to measure the material and tools of the filter cloth, soft braided rope and measuring tape.
(2) Let the belt filter press run normally and adjust the speed of the motor to the minimum speed.
(3) When the metal fittings running to the filter belt of the filter press are present, attach the long enough braided rope to the metal fitting of the filter cloth. Let the braided rope rotate with the operation of the filter cloth.
(4) Mark the braided rope when the braided rope rotates with the filter belt once, that is, when the metal joint appears. This measures the length of one week of the braided rope around the filter cloth, which is the length of the filter cloth.
(5) The same method measures the length of the other filter.
Note: When the braided rope is in operation with the filter cloth, the end of the hand holding the braided rope will slightly force when the filter cloth is running, so that the braided rope will be tight, otherwise the measured length error is relatively large.
Be careful not to ignore the length of the metal fittings. The metal fittings are to be counted in the length of the filter tape when measuring.
Filter cloth selection:
There are dozens of kinds of woven textures in filter press belts used for sludge concentration and dewatering. The technical parameters of the filter belt are porosity, water permeability, air permeability, and the diameter of the latitude and longitude lines. Filter cloth selection should follow the following principles:
(1) The nature of the sludge. Such as: printing and dyeing sludge, domestic sludge, chemical sludge. This kind of sludge basically has such characteristics, the sludge particles are delicate, strong in viscosity, poor in permeability, and strong in fluidity. The filter cloth selected for this type of sludge should have good cake peelability, good water permeability, and dense weave texture.
(2) The use of the net. The network used for the sludge thickening and filter section is very different. The sludge has just flocculated and concentrated. At this time, it needs to be woven into a group. It needs to be woven with a simple, porous, fast filter screen, which has good results and high operating efficiency.
The filter cloth used for the press-pressing press section is relatively tightly woven and has a small porosity. Of course, the dewatering of materials such as cassava slag, papermaking, and other slurry is excluded.
Closed-circuit Centrifugal Spray Dryer is a system composed of a closed circulation loop, and the heat carrier can be recycled. For the drying of volatile materials that are organic chemical solvents, toxic or can cause harm to people and the environment after escaping, the organic solvents or products contained in the material liquid are easily oxidizable, flammable and explosive materials. Under normal circumstances, the materials that need to be used in this process cannot contact oxygen, so most of the heat carriers use inert gases (such as nitrogen, carbon dioxide, etc.); this method is also called inert gas drying. The exhaust gas discharged from the Dryer, after gas-solid separation, also passes through the condenser to recover the solvent or remove the moisture, and then enters the dryer for recycling after being heated up by the heater. Through the heating medium and closed circulation method, we can effectively avoid the danger of high temperature in the drying of materials, prevent contact with oxygen during the Spray Drying Process, and recover more than 90% of the dust.
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