The features of Sludge dewatering belt press
Sludge dewatering belt press has compact structure, small footprint, simple operation, easy maintenance, less water, high washing net, greatly shorten washing time, improve productivity, continuous operation, and can also choose different mesh screen for different pulp types to reduce pulp loss.
1. Sludge dewatering belt press has a reinforced frame, beautiful and elegant appearance.
2. The structure of Sludge dewatering belt press has smooth operation and low noise.
3. The concentration pre-treatment equipment is equipped with good mud flocculation effect and low operating cost.
4. The filter cloth configured in the gravity dewatering area makes the material evenly distributed and prolongs the life of the filter belt.
5. With extra-long gravity dewatering area and wedge dewatering, the material is fully dewatered and will not run away. The dewatering effect is good. Therefore, the production capacity is large, energy-saving and efficient.
The following is a brief introduction of the structure and working condition of each main component of Sludge dewatering belt press.
1、Frame: The frame of the belt press filter is mainly used to support and fix the press roller system and other parts.
2、Pressing roller system: It consists of rollers arranged in order from large to small diameter. When the sludge is held by the upper and lower filter belts and passes through the press rollers in turn, a pressure gradient from small to large is formed under the tension of the filter belt, so that the pressing force on the sludge in the dewatering process increases continuously and the water in the sludge is gradually removed.
3、 Gravity zone dewatering device: It mainly consists of gravity zone bracket and trough. After the flocculation, the material is stripped of a large amount of water in the gravity zone, and the liquidity becomes poor, creating conditions for later extrusion dewatering.
4、 Wedge-shaped zone dewatering device: The wedge-shaped zone formed by the upper and lower filter belts exerts squeezing pressure on the clamped materials and carries out pre-press dewatering to meet the requirements of the press dewatering section on the liquid content and liquidity of the materials.
5、filter belt: It is the main component of the belt press filter. The separation process of solid phase and liquid phase of sludge is carried out by the upper and lower filter belts as the filtering medium, and the pressing force required to remove the moisture of the material is obtained by bypassing the pressing roller under the action of the upper and lower filter belt tensioning force.
6, the filter belt adjustment device: by the implementation of components: cylinder, adjusting roller signal anti-pneumatic, electrical system. Its role is to adjust the uneven tension of the filter belt, roller installation error, uneven feeding and other reasons caused by the filter belt runaway, so as to ensure the continuity and stability of the belt press filter.
7. Filter belt cleaning device: It consists of sprinkler, cleaning water receiving box and cleaning cover. When the filter belt walks, it passes through the cleaning device continuously and is impacted by the pressure water sprayed by the sprinkler, the materials remaining on the filter belt are separated from the belt under the action of pressure water, so that the belt is regenerated and prepared for the next dewatering process.
8, filter belt tensioning device: composed of tensioning cylinder, tensioning roller and synchronization mechanism, its role is to tension the filter belt and provide the necessary tension conditions for the production of the pressing force of pressing dewatering, and the adjustment of its tension size can be achieved by adjusting the air pressure of the tensioning cylinder of the air pressure system.
9 、Unloading device: consists of scraper plate, knife frame, unloading roller, etc. Its function is to strip the filter cake and filter belt after dewatering to achieve the purpose of unloading.
10、Transmission device: It is composed of motor, reducer, gear transmission mechanism, etc. It is the power source of the filter belt walking, and can meet the requirements of different belt speeds in the process by adjusting the speed of the reducer.
11, air pressure system: The system is mainly composed of power source (storage tank, motor, air pump, etc.), execution components (cylinder) and air pressure control components (including pressure relays, pressure flow and directional control valves). Through the pneumatic control element, the air pressure, flow and direction are controlled to ensure that the pneumatic actuating element has a certain thrust and speed, and works normally according to the predetermined procedure. It is the power source to complete the filter belt tensioning and adjusting operation.
The main body host part is made of stainless steel, including the main dewatering shaft, waterproof cover, mud flap and other parts.
The frame of the main machine is made of square tube welded, and its surface is treated with high-strength spray paint, and its rusting ability can reach more than 10 years.
The bearing seat is sealed by iron casting to strengthen the strength and wear resistance.
According to the physical characteristics of different materials choose different filters, using high strength. Smooth surface, good water permeability, not easy to block, high solids recovery rate, easy to clean.
Reasons for decrease in solids content of Sludge dewatering blocks
①The nature of sludge or the amount of incoming sludge is changed, and the dosing amount or type of dewatering machine is not suitable for the change of situation, resulting in the decrease of dewatering performance of sludge and the decrease of solids content of Sludge dewatering blocks, at this time, the test should be conducted again to determine the appropriate flocculant type or dosing amount, and 40 degree cationic flocculant is recommended.
②The belt speed is too fast, so that the sludge extrusion time is not enough, the Sludge dewatering blocks become thin and the solid rate decreases, the countermeasure is to reduce the belt speed in time.
③The belt tension is too small, which cannot produce enough squeezing force and shearing force, so that the solid content of Sludge dewatering blocks decreases, and the belt tension should be increased appropriately.
④The filter belt is clogged and the water cannot be filtered out, so that the water content of dewatering sludge rises, the operation should be stopped and the filter belt should be flushed carefully before putting it back into operation. It is recommended to check whether the molecular weight of flocculant is too high.