Municipal sewage treatment plant sludge drying has those imported equipment is better, please recomm

At present, there are two main types of domestic and international sludge drying equipment, one is plate and frame filter press and the other is centrifugal dehydrator. We will purchase a lot every year, imported and domestic are commonly used, and most of the foreign imports to China are centrifugal.

So our experience is that the centrifugal dewatering rate is too low, and the sewage splashes everywhere during operation. So I think the domestic plate and frame type is very good, saving money and easy maintenance.

Let me tell you a sad thing: we purchased a certain brand of centrifugal dehydrator according to the requirements of a certain owner, and after it was put into production, the director of the big factory saw that the ground was leaking seriously, and said no, he was playing tricks with us and saying no, we said: We are completely in accordance with your requirements for procurement, don't be unreasonable, in progress.

Imported equipment for sludge drying of municipal sewage treatment plant, Alfa Laval Aldec G3 decanter centrifuge in Sweden.

Alfa Laval ALDEC G3 decanter centrifuge is a new generation of sludge dewatering equipment for municipal and industrial wastewater treatment industry, designed to provide sludge dewatering, sludge thickening, sewage treatment, separation, filtration and purification and other process performance. It makes the processing capacity larger and the sludge drier; 15% saving flocculant for rotary feeding; Save energy.

How it works: The separation process takes place along a bowl with a horizontal cylindrical section equipped with a screw conveyor. The material enters the bowl through a fixed feed pipe and is smoothly accelerated by the feed distributor. The centrifugal force generated by the rotation settles the solids cake on the inner wall of the bowl.

The rotation of the spiral is the same as that of the bowl, and as the speed of the spiral decreases, the solids are pushed towards the end of the cone of the bowl. The mud cake is discharged through the slag discharge port of the drum. The separation process takes place in the entire cylindrical section of the drum, and the separated liquid is discharged to the liquid phase outlet through the energy-saving weir plate at the large end of the drum.

At present, the sludge treatment process of sewage treatment plant is the most advanced in the world: including volume reduction, stability, harmlessness and comprehensive use.

The process flow is: the perfect sludge disposal technology is: the remaining sludge sludge thickening, sludge digestion, sludge dewatering, mud cake.

Introduction: The composting, landfilling, drying and heating disposal of sludge and its final use are called sludge disposal.

Biochemical treatment.

I now know that in economically developed areas, during the sewage treatment process, sewage treatment plants have begun to add sludge to reduce microbial preparations, deodorize and reduce the amount. Reduced wastewater treatment plant costs. It should be well applied.

Your question is the most advanced process, I think it should be the steam drying process.

However, this process technology is not yet mature, and few sewage treatment plants are in use.

Direct heating drum drying technology.

Indirect heating drum drying technology.

Centrifugal drying technology.

Indirect multi-disc drying technology (pearl process).

Fluidized bed sludge drying technology.

Since the late 80s of the 20th century, sludge drying technology has been widely used in developed countries such as Europe and the United States. For example, in the early 80s of the 20th century, only a few sewage treatment plants in the European Union used sludge thermal drying equipment to treat sludge, but by the end of 1994, there were about 180 sludge drying treatment plants, and the number is still increasing year by year; In Europe, the amount of sludge treated with heat treatment will double in the next decade; The number of sludge heat treatment plants in the Commonwealth will increase tenfold in the next decade; Since 1995, at least 28 new sludge drying plants have been designed or installed in the United States. At the same time, sludge drying technology has also received more and more attention from the environmental engineering community in developing countries, providing valuable experience for sludge disposal in China.

Liaocheng Huafeng Chemical.

The steam drying process is very mature, why are there not a few factories in use? We have been using pulp leaf drying for three years, and it has been very stable. The heat transfer efficiency is relatively high, and all kinds of drying equipment have strengths, so it is necessary to choose products that are suitable for their own processing capacity and treatment nature.

There is no state-of-the-art, only the suitable.

It should be the sludge integrated treatment device of Zhejiang Oukemei Technology Co., Ltd.

There is no state-of-the-art only more suitable.

At present, there are many brands of sludge treatment equipment and sludge drying equipment. But the real effect is not very good, many brands of equipment can not achieve the moisture content of the country, but Shandong Fuhang sludge treatment equipment can reduce the moisture content to 30-40%, which can fully meet the needs of customers, and [Shandong Fuhang sludge treatment equipment] has many advantages:

Multi-layer three-dimensional design, less land occupation, fast drying, scientific and reasonable structure;

The use of solar energy as the main energy source to meet the needs of sustainable development;

The power consumption of evaporation of 1t water is only 60-80kw h, while the power consumption of traditional thermal drying technology is 800-1060kw h;

After drying, the volume of sludge can be reduced to the original 1 3-1 5, which can achieve stabilization and retain its original reuse value.

The system runs stably, safely, and the amount of dust generated is small;

High degree of automation, convenient operation and maintenance, long service life;

The system has a high degree of transparency and good environmental coordination.

Multi-layer three-dimensional design, less land occupation and high efficiency;

The use of solar energy as the main energy source to meet the needs of sustainable development;

The power consumption of evaporation of 1t water is only 60-80kw h, while the power consumption of traditional thermal drying technology is 800-1060kw h;

After drying, the volume of sludge can be reduced to the original 1 3-1 5, which can achieve stabilization and retain its original reuse value.

The system runs stably, safely, and the amount of dust generated is small;

High degree of automation, convenient operation and maintenance, long service life;

The system has a high degree of transparency and good environmental coordination.

The sludge drying treatment system truly realizes the harmlessness, reduction, stabilization and resource utilization of sludge. The system has passed the expert demonstration of the Ministry of Construction, creating a new era of sludge treatment and disposal in China. The technology has reached the domestic advanced level, and can be widely used in sludge treatment and disposal in municipal, chemical, metallurgy, electric power, coal and other industries.

The advanced technology applied in the sludge drying equipment - the combination of solar energy and heat pump technology to dry the sludge at low temperature.

Methods can be divided into:1

Direct heating type: the hot gas generated by the combustion chamber is directly mixed with the sludge, so that the sludge can be heated, the water can be evaporated and the dry sludge product can be obtained, which is the application of the differential Luzhou flow drying technology; 2

Indirect heating type: The virtual hot gas generated by the combustion furnace is passed through the steam.

According to the way the hot medium contacts with the sludge, it can be divided into: 1

Direct heating type: the hot gas generated by the combustion chamber is directly mixed with the sludge, so that the sludge can be heated, the water can be evaporated and the dry sludge product is finally obtained, which is the application of convection drying technology; 2

Indirect heating type: the hot gas generated by the combustion furnace is transmitted through the steaming gas and hot oil medium to heat the wall of the device, so that the wet sludge on the other side of the wall is heated and the water is evaporated and removed, which is the application of conduction drying technology; 3

Direct and indirect "combined drying: that is"Convection-conduction technique"of the combination.

According to the form of equipment, it can be divided into: drum type, turntable type, belt dismantling type, spiral type, centrifugal drying high-speed jujube machine, spray multi-effect evaporator, fluidized bed, multi-coil type, film type, pulp plate type and other forms.

As far as I know, the current domestic municipal sludge dryer is not mature, and the main type of spine is still the technology and equipment that has infiltrated into foreign countries.

However, in terms of sludge dryers for printing and dyeing factories, tanneries, paper mills, and electroplating plants, the sludge dryers designed and manufactured by domestic manufacturers such as Guangzhou Kaicheng Drying Equipment are relatively mature.