Sludge centralized distribution device based on the working principle of the sludge dewatering machi

A variety of chemicals can be used for sludge deep dewatering, and the following are the most common chemicals used for ordinary sludge dewatering:

Cationic polyacrylamide: This is a polymer flocculant, which can flocculate small particles in sludge into larger particles through adsorption and bridging, and improve the sedimentation performance and dewatering performance of sludge.

Polyaluminum chloride: This is an inorganic polymer coagulant, which can coagulate with impurities in the sludge to form an insoluble precipitate, so that the water in the sludge is separated.

Lime: Lime can neutralize with the acids in the sludge, adjust the pH value of the sludge, and promote the cohesion and settlement of the sludge.

Diatomaceous earth: Diatomaceous earth has the characteristics of porosity and high specific surface area, which can be used as a filter aid to improve the filtration performance and dewatering performance of sludge.

It should be noted that different kinds of agents are suitable for different sludge properties and treatment requirements, so it is necessary to choose the appropriate agent according to the specific situation in practical applications. For sludge with high organic matter, under the condition that lime is not allowed to be added in the process, it is necessary to customize the organic deep sludge dewatering agent, and adjust the corresponding process parameters to ensure the sludge treatment effect.

The standard guide mud mass is concentrated in the filter cloth, and the width and narrowness of the sludge mass can be adjusted according to the characteristics of the sludge when pressed, so that the filter cloth and the sludge dewaterer roller can bear a uniform extrusion force to prevent the occurrence of leak detection.

Sludge dewatering machine has made a great contribution to the protection of human ecological environment, it will play a role in the treatment of sludge after sewage treatment in sewage treatment plants and sewage stations.

Types of sewage desilters:

The adaptation of various sludge dewatering machines is somewhat different, the sludge of the sewage treatment plant is roughly physical sludge, biochemical sludge and physicochemical biological mixture sludge, and there are currently three models of sludge dewatering machine commonly used in China, filter belt type, centrifugal type, spiral ring disc type and plate and frame type.

Sludge dewatering machine of filter belt type: poor adaptability to mixed sludge and biochemical sludge, more sludge reflux, adaptation to physical sludge, and low water content of filter cake, large water consumption for backwashing, high energy consumption, complex maintenance. Spiral Ring Butterfly:

Its disadvantage is that the output is low, and the first generation of dehydrator represented by the 3-4 one-day prototype has been popularized and applied in China. Centrifugal type: all can be adapted to all three types of sludge, its disadvantage is that it is noisy due to its high speed, and its energy consumption is high.

Working principle of sludge dewatering machine::

1. Belt sludge dewatering machine: it is composed of two upper and lower tensioned filter belts with sludge layer, its shape is like an S shape, from a series of circulating roller cylinders, rolling and shearing force on the sludge. Because of its own tension, the capillary water hidden in the sludge layer is separated, and the function of sludge dewatering has been achieved.

2. Centrifugal sludge dewatering machine: it is composed of spiral device materials with a hollow shaft, sludge is fed into the drum by the hollow shaft, and the centrifugal force is thrown into the drum cavity under high-speed rotation, forming solid-liquid separation, because the specific gravity is different, the sludge is transmitted to the cone end of the drum, and is continuously discharged from the outlet under the impetus of the screw conveyor; The liquid discharged from the weir mouth to the outer liquid ring layer of the bowl is discharged by gravity.

3. Stacked sludge dewatering machine: fixed ring, the spiral shaft is formed by holding a series in it, receiving gravity concentration and the internal pressure formed by the sludge by the back pressure plate in the process of advancing to achieve dewatering, and the filtrate is squeezed out of the filter slit formed by the fixed ring and the moving ring, and the mud cake is squeezed from the end of the dewatering part.

4. Plate and frame sludge dewatering machine: the sludge is extruded by the high-pressure pump through the plate and frame, and the water in the sludge is discharged through the filter cloth in a closed state, so as to achieve the purpose of dewatering.

The treatment capacity of the sludge dewatering machine should be controlled within an appropriate range to avoid causing equipment overload to make the system fluctuate frequently and affect the treatment effect because of the sudden increase in load, combined with the flocculant flow rate and the difference degree and the sludge flow rate to adjust, and the treatment efficiency of the larger equipment can be achieved at the same time. , you can get it for free

There are many models of belt sludge dewatering machine, mainly used in industrial water treatment, sewage treatment, water treatment and other industries, its working principle is the separation of water-containing sludge, transported to the sludge mixing tank by the sludge pump, and at the same time adding coagulant for full mixing reaction, flocculant is a polymer, and the sludge slurry has a bridge when mixing. Netting. Adsorption electrical neutralization function, and then flow into the sludge distributor of the belt sludge filter press, the sludge is evenly distributed to the gravity dewatering area, and under the two-way grooming and gravity of the sludge rake, the sludge moves with the movement of the dewatering filter belt, and quickly removes the free water of the sludge.

Due to the long design of the gravity dewatering zone, the maximum gravity dewatering is achieved. The flipped sludge enters the super-long wedge-shaped pre-pressure dewatering zone and slowly clamps the sludge unloaded in the gravity zone to form a sandwich-style angle layer, and slowly increases the pressure filtration in order to minimize the residual free water in the mud layer

s "Crushing section, in".

In the "S" type pressing section, the sludge is sandwiched in the middle of the upper and lower two layers of filter cloth, and is repeatedly pressed by a plurality of press rollers, and when the upper and lower filter belts pass through the waveform path formed by the staggered rollers, due to the alternating sequence of the upper and lower positions of the two filter belts, the shear force is generated on the clamped mud cake, and most of the water remaining in the sludge is filtered out, so that the mud cake is dehydrated again, and finally the dry mud cake is scraped off by the fiber scraper, and transported to the sludge storage place by the belt conveyor or shaftless screw conveyor.

1.The treatment capacity of the sludge dewatering machine is controlled within an appropriate range, and the sludge flow rate, flocculant flow rate and difference are adjusted to avoid frequent fluctuations in the system and affect the treatment effect caused by the sudden increase in load caused by the equipment overload, and at the same time, it can achieve a larger equipment treatment efficiency;

2.When the sludge concentration changes, the flocculant flow rate and differential velocity should be adjusted in time, which should not only ensure the treatment effect but also avoid waste; When the sludge flow rate increases or the sludge concentration increases, the flocculant flow tracking increases, and the differential velocity increases accordingly. The sludge flow rate decreases or the sludge concentration decreases, the flocculant flow tracking decreases, and the differential velocity decreases accordingly;

3.There is no best flocculant, only the most suitable, the flocculant model and consumption depend not only on the quality of the agent and the sludge properties matching, but also on the matching with the equipment structure type and operating conditions, only the three get the best combination of operation, in order to achieve the lowest flocculant consumption, the best treatment effect and the highest treatment efficiency.

4.The performance of mud biscuits should be combined with torque data to determine the optimal differential speed value range, and in principle, the lower differential degree should be used as much as possible to achieve better treatment effect and save flocculant consumption without causing centrifuge clogging and satisfying the processing capacity.

5.The work of all on-site management and operation personnel is to constantly observe, adjust and summarize in time, and seek the best and relatively stable perfect cooperation of all working parameters in various changes that may occur as much as possible.

Under normal circumstances, this kind of observation and adjustment should be carried out once in 1 2 hours, and it is necessary to strictly avoid the situation that the equipment operating parameters adhere to for a long time or a shift without any adjustment after starting, and the laziness or lack of responsibility of the operators on the site is one of the main reasons for the long-term operation efficiency of the sludge dewatering workshop is not high, the treatment effect fluctuates greatly and the waste of chemical consumption.

6. Frequently test the dehydration effect of the dehydrator, if the separating liquid (or filtrate) is found to be turbid and the solid return rate is reduced, the cause should be analyzed in time and targeted measures should be taken to solve it.

7. Frequently observe the sludge dewatering effect, if the solid content of the mud cake decreases, the situation should be analyzed and targeted measures should be taken.

8. Frequently observe the operation status of the sludge dewatering device, and take corrective measures for abnormal phenomena to ensure normal operation.

9. Sufficient flushing time of the dehydrator should be ensured every day, and when the dehydrator listens to the machine, the inside of the machine and the whole body should be rinsed thoroughly to ensure cleanliness and reduce the odor. Otherwise, it is very difficult to rinse after the sludge has dried.

10. According to the requirements of the dehydrator, often do a good job of observation and inspection and maintenance of the machine.

11. Always pay attention to check the easy wear and tear of the dehydrator, and replace it if necessary.

12. Timely find the damage of sand particles in the mud in the mud of the dehydrator to the filter belt, and replace it in time when the damage is serious.

13. Make analysis and measurement records.

The types of sludge dewatering machines include belt filter press dewatering machine, which has good dewatering effect and clean separation of sludge and water.

Hello! The following are the commonly used sludge dewatering machines and their working principles:

1. Plate and frame sludge dewatering machine: In a closed state, the sludge driven by the high-pressure pump is squeezed by the plate and frame, so that the water in the sludge is discharged through the filter cloth to achieve the purpose of dewatering.

2. Belt sludge dewatering machine: the sludge layer is carried by the upper and lower two tensioned filter belts, passing through an S-shape from a series of regularly arranged roller cylinders, relying on the tension of the filter belt itself to form the pressing and shearing force of the sludge layer, and squeezing out the capillary water in the sludge layer, so as to realize sludge dewatering.

3. Centrifugal sludge dewatering machine: It is composed of a screw conveyor with a hollow shaft, and the sludge is fed into the drum by the hollow shaft, and under the centrifugal force generated by high-speed rotation, the sludge is thrown into the drum cavity. Due to the different specific gravity, solid-liquid separation is formed.

Under the impetus of the screw conveyor, the sludge is conveyed to the cone end of the bowl and continuously discharged from the outlet; The liquid in the liquid ring layer is continuously discharged from the weir mouth to the outside of the bowl and discharged by gravity.

4. Stacked sludge dewatering machine: the filtration body formed by the fixed ring and the swimming ring are superimposed on each other, and the spiral shaft runs through it. The filtrate is discharged from the filter slit formed by the fixed ring and the movable ring, and the mud cake is discharged from the end of the dewatering section.

Nico Environmental Technology**** Sludge Non-thermal Drying NHD Technology, using non-heating method to dewater and dry sludge, it only takes 10 minutes to reduce the moisture content of sludge from 85%-80% to 55%, and then through the forced ventilation drying technology in the non-heated state, the moisture content in the sludge continues to reduce to 40%, and the energy consumption is only 10% of thermal drying, and the treatment process will not produce odor.

Sludge heatless drying NHD technology "overcomes the worldwide problem of high energy consumption and odor generation of sludge drying." Another striking result is that the dried mud cake has a fairly high calorific value.

Due to the drying process without heating, the loss of organic matter in the sludge is avoided. The biomass fuel made from the dried mud cake has been tested by the authoritative department, and the actual detection effect of the sludge heatless drying project of the MCC Sewage Treatment Plant in Funing District, Qinhuangdao is taken as an example, and the calorific value reaches 4080 kcal, which is higher than that of lignite, and the mud is truly turned into "coal". It realizes the principle of circular economy advocated by the state, and truly realizes the reuse of resources for sludge treatment and disposal.

Common dewatering machines are sludge dewatering machines, belt dewatering machines.

The common sludge dewatering machine has belt filter press dewatering machine equipment, which has high efficiency and advanced technology.

This is the working principle of the "New Ring" belt sludge dewatering machine, which is designed according to the dewatering characteristics of the sludge. Principle: The conditioned sludge enters the gravity dewatering area of the belt sludge dewatering machine, and is in the distribution mechanism and the dredge mechanism.