Advantages and disadvantages of screw press sludge dewatering

How much do you know about the advantages and disadvantages of the screw press sludge dewatering? I think when you hear the name of the screw press sludge dewatering, what you think of is the advantages of wide use, small floor area and so on. I'm afraid many people don't understand other advantages! We are summed up a lot of experience, to do a specific analysis, to see what kind of advantages and disadvantages of screw press sludge dewatering!

Now let's take you to understand the advantages and disadvantages of the screw press sludge dewatering?

Advantages of screw press sludge dewatering:

It is widely used

1. It is suitable for sludge from municipal sewage, food, beverage, chemical industry, leather, welding material, papermaking, printing and dyeing, pharmaceutical and other industries.

2. Suitable for dewatering of high and low concentration sludge. When dewatering low concentration (2000mg / L ~) sludge, there is no need to build thickening tank and storage tank, which can reduce the construction cost, phosphorus release and anaerobic odor generation.

Small design

The design is compact. The dehydrator includes electric control cabinet, metering tank, flocculation mixing tank and dehydrator body.

2. Small space, easy to repair and replace; small weight, easy to carry.

Not easy to block

1. It has the function of self-cleaning. There is no need to clean to prevent the filter gap from blocking, so as to reduce the water consumption and the burden of internal circulation.

2. Be good at dewatering oily sludge.

Low speed operation

1. The rotating speed of the screw shaft is about 2 ~ 3 rpm, and the electrode consumption is low.

2. Less trouble, less noise and vibration, safe operation.

The operation is simple

1. Through the electric control cabinet, it can be connected with the drug foaming machine, sludge pump and dosing pump to realize 24-hour continuous unmanned operation.

The daily maintenance time is short and the maintenance work is simple.

Durable

1. Almost all of the body is made of stainless steel, which can extend the service life.

2. The replacement parts are only spiral shaft and traveling ring, and the service cycle is long.

Cost reduction of design, construction and operation

1. Product specifications are diverse, complete series, for different processing scale, can choose the right model, avoid overuse.

2. The machine body is compact in design and integrated in thickening and dewatering. It is equipped with auxiliary devices such as electric control cabinet and sludge flocculation mixing tank. It has strong compatibility with supporting equipment and is convenient for design.

3. Small design, easy to adjust measures to local conditions, can reduce the floor space and construction cost of dehydrator itself.

4. With the function of sludge thickening, there is no need for thickening and storage unit, which reduces the overall floor space and construction cost of sewage treatment facilities.

5. The main body of the dehydrator has the function of self-cleaning, so it is not necessary to use a lot of water to clean in order to prevent sludge blockage.

6. Low speed screw extrusion technology, low power consumption.

The electric control cabinet is equipped with automatic control device, which can realize 24-hour full-automatic continuous unmanned operation from conveying sludge, injecting liquid medicine, thickening and dewatering to discharging sludge cake, so as to reduce labor costs.

Operating cost of screw stacking machine:

1. Low concentration direct dehydration, do not concentrate equipment and site;

2. The power consumption per hour is 1.95kw. If it operates according to 12 hours, the annual power consumption is 1.95 * 1 * 12 * 365 = 8541 CNY per kilowatt hour. If it operates 24 hours a day, the annual power consumption is 1.95 * 1 * 24 * 365 = 17082 CNY;

3. Low speed operation, no vibration, very low noise;

4. The maintenance and management is simple. Only the moving ring and screw shaft need to be replaced. The replacement cycle of the moving ring is 3-4 years, and the replacement cycle of the screw shaft is as long as 11 years

Operating cost of centrifuge:

1. It is necessary to build a concentration tank and the cost is high;

2. The power consumption of centrifuges with the same processing capacity is 22.5kW per hour. If the centrifuges are operated according to 12 hours, the annual power consumption is 22.5 * 1 * 12 * 365 = 98550 yuan, if the centrifuges are operated according to 24 hours, the annual power consumption is 22.5 * 1 * 24 * 365 = 197100 yuan;

3. High speed operation, great noise, affect the physical and mental health of workers;

The maintenance management is difficult, the hub is easy to break down and needs to be returned to the factory for maintenance. The cost is high and the production is affected.

Disadvantages of screw press sludge dewatering:

1. The noise is loud and the heart beats faster at the scene;

2. The change of material concentration needs to adjust the speed and speed difference in time;

3. In the high-speed environment, the site is dirty, and there is fog containing mud;

4. Improper operation may result in blockage of sludge outlet and possibility of re slurrying of sludge during backwashing.

The wear and tear of a good equipment shows that the ring piece is more than one year and less than two years, and the spiral shaft is more than three years. Of course, it depends on the nature of the sludge. The easier it is to handle, the shorter the service life of the dry sludge will be. But this is only an individual case, and we can ignore it. The warranty period of an equipment is one year, and I estimate that the cost settlement should also be one year, so you should pay attention to the equipment purchase. The future maintenance cost will be a large sum of money. As for how much, I believe you owners will calculate more clearly than I do.

Advantages of screw type dehydrator

1. It is widely used in municipal, food and beverage, slaughtering and breeding, printing and dyeing, petrochemical, papermaking, leather, pharmaceutical and other industries;

2. Equipment is not easy to be blocked - the unique structure of dynamic and static ring filter joint makes the equipment not easy to be blocked. There is no need to prevent the filter joint from being blocked, and a large amount of flushing is carried out, so as to reduce the water consumption for flushing, reduce the burden of internal circulation, and solve the troubles caused by traditional equipment blockage to enterprises;

3. Continuous and automatic operation - the sludge dewatering machine adopts automatic control from extracting sludge, injecting liquid medicine and discharging sludge cake. Through the electric control cabinet, it is linked with the medicine soaking machine, sludge feeding pump and dosing pump. It does not need personnel to operate the equipment, and will not cause blockage, filtration and other process safety. The daily maintenance is simple, and it can be operated unattended for 24 hours. It realizes the continuous and automatic operation of sludge dewatering in the real sense;

4. Save operating costs - integrated overall design, compact design, greatly save operating costs. Low speed spiral extrusion technology makes the power consumption greatly reduced; the equipment is not blocked, the flushing water is greatly reduced; 24-hour automatic unmanned operation, the labor cost is greatly reduced. Therefore, this equipment has really become a new type of energy-saving and environmental protection equipment in line with the policy;

There is no secondary pollution - the rotating speed of the screw shaft is about 2 ~ 3 rpm, no vibration, and the noise is very small; the lamination has the self-cleaning function, and it will not block, only needs a small amount of water to wash, and there is no secondary water pollution; in addition, the sludge runs at such a slow state, and the odor does not diffuse, so it creates a very good operating environment;

6. The machine body is light and durable - due to the direct use of mechanical extrusion technology, there is no need for roller and other large body, so the machine design is quite light; almost all of the body is made of stainless steel, the replacement parts are only spiral shaft and moving ring, with long service life and durability;

7. Save project investment - the stacked screw sludge dewatering machine has the function of sludge thickening, which can directly treat the aerobic sludge in the aeration tank without thickening and storage unit, thus reducing the construction cost of the overall occupied space of the sewage treatment facilities;

8. Enhance the function of phosphorus removal - sludge dewatering under aerobic conditions will not release phosphorus under anoxic or anaerobic conditions in traditional sludge thickening tank or storage tank, so as to improve the phosphorus removal function of the whole sewage treatment system.

The advantage of this equipment is saving energy. Save water, electricity, labor, floor space and simple operation, which many manufacturers will boast.

But our users must choose according to their own actual situation!

Inapplicable, some inorganic sludge dewatering and treatment capacity is seriously low, and the cost of single equipment is high.

The main technical and economic indexes involved in the practical engineering application of dehydration equipment include: ① treatment capacity, ② moisture content of mud cake, ③ chemical dosage, ④ power consumption, flushing water consumption, etc.

Advantages 1: the stacked screw type sludge dewatering machine is originated from foreign advanced technology, and then introduced into China to realize localization. It has been widely used in various industries in the process of sewage treatment for many years, as a supplement to the existing domestic technology products. The product has long service life, small occupation space, convenient maintenance, low operation cost, and can realize 24-hour full-automatic operation

The second advantage: at the same time, the characteristics of low concentration treatment make the equipment reduce the dependence on sludge storage tank (thickening tank) to a certain extent, which can save investment for new sewage projects.

The advantages of the application range of the screw type sludge dewatering machine are as follows:

The screw type sludge dewatering machine has a wide range of applications, such as petroleum, municipal, chemical, breeding, pharmaceutical, textile, printing and dyeing, machinery manufacturing, and so on.

What are the advantages and disadvantages of the screw press sludge dewatering? It has been introduced almost. The screw press sludge dewatering is a good choice for many small enterprises. Although there are some problems, the advantages of the screw press sludge dewatering can be ignored.