The filter press is a filter separator. Its working principle is to use a pressure pump to inject the suspension into multiple closed filter chambers formed by multiple vertically arranged filter plates under the action of a hydraulic system. There is pressure on both sides of the filter cloth. Otherwise, the liquid in the filter chamber passes through the filter cloth adjacent to the filter plate and is discharged from the filter press along the filtrate confluence channel. The solid impurities after dehydration are trapped in the filter chambers to form filter cakes, and the adjacent filter plates are separated by a pull plate machine. The filter cakes in each filter chamber fall under the action of gravity to achieve solid-liquid separation. Filter presses are widely used in various industries, including environmental protection, mineral processing, chemistry, food and medicine.
After years of introduction, digestion and independent innovation, the production technology and process equipment level of the filter press industry in my country has been greatly improved, the technical content and quality of the products have been greatly improved, and the overall equipment level is close to the world's advanced level. Not only the operating efficiency of the filter press equipment has reached the international advanced level, but also the operating reliability of the equipment is getting smaller and smaller with foreign countries, and local products are gradually entering the international market.
The demand for the filter press market in my country has increased from approximately 35,100 units in 2012 to 107,200 units in 2019, with an average annual compound growth rate of 13.3%. In 2012, the production volume of my country's filter press market was about 3.65 units, which increased to 153,400 units in 2019, with a compound annual growth rate of 22.8%. After bottoming out in 2016, my country's filter press market began to recover. By 2019, the market size will reach 6.92 billion yuan, a growth rate of 21%.
In recent years, driven by a series of government policies, my country's urban sewage treatment facilities have basically been completed. In 2018, the national urban sewage treatment rate reached 95.49%.
Although the level of sewage treatment in my country has been continuously improved, and the scale of treatment has been at a high level in the world, the level of supporting sludge treatment has not reached the corresponding requirements, and the level of sludge treatment has lagged seriously. The data shows that in 2018, the scale of single-day disposal of harmless sludge nationwide was 74,200 tons, and the proportion of harmless sludge was only 40%. With the increasing awareness of the environmental risks and hazards of sludge in various regions in recent years, various national and local policies, regulations, and plans have been promulgated one after another, and the trend of "equal attention to sludge and water" is gradually taking shape, and standards for sludge treatment and disposal costs are also emerging. The trend of increasing year by year has become a major benefit for the development of the sludge
The increase in the proportion of sludge harmless disposal will boost market demand for filter presses
The generation of sludge mainly comes from the treatment of sewage, and 30% to 50% of the pollutants in the sewage are transferred to the sludge. The moisture content of sludge is a core indicator for the harmless treatment and resource utilization of sludge. Under normal circumstances, 10 to 30 tons of sludge can be produced for every 10,000 tons of industrial sewage treated, and 5 to 8 tons of sludge with a moisture content of 80% can be produced for every 10,000 tons of domestic sewage. With the acceleration of urbanization and the acceleration of science and technology, the amount of sewage generated and the treatment rate have also increased, resulting in more sludge. In 2018, the amount of sludge produced in China was 80.263 million tons, an increase of 17.93 billion tons from 2014 .
Filter press is a rigid requirement for the field of sludge treatment. In the process of sludge treatment and disposal, the requirements for moisture content in each process are becoming more and more stringent, which stimulates the demand for mechanical dehydration equipment. Under normal circumstances, the sludge treatment and disposal system should include sludge stabilization, reduction and harmless treatment and disposal processes, based on this, to realize the rationalization of resource utilization. At present, among the various technical routes in the field of domestic sludge treatment, energy drying, mechanical dehydration, aerobic fermentation, and anaerobic digestion technologies account for 31%, 27%, 18%, and 20%, respectively, of which mechanical dehydration is one of the A mainstream technical route. Filter press filtration is one of the most important equipment for mechanical dehydration, which has rigid requirements.
The increase in the production of machine-made sand and the large-scale trend of mines have increased the demand for the filter press market. In the production process of the machine-made sand wet process, one procedure is water washing, so a lot of sewage is generated during the process of washing the sand with water. The current treatment technology route is generally to use a filter press to separate the sand washing wastewater, the mud is filtered into a mud cake and discharged, and the clean water is returned to the clean water turret to realize the efficiency of fine sand recovery, solid waste dry discharge treatment and water resources Recycling and reuse. With the development of mechanical sand production, the scale of mines and standardization, the implementation of environmental protection policies has been strengthened, and the large amount of waste water disposal demand brought about will become another increase in filter presses, and further increase the market space for filter presses.
Industry concentration continues to increase
Filter press is a capital-intensive industry, and its high-end products and mass customization production needs require a large amount of capital investment, and the industry has a high barrier to entry. Data in June 2020 showed that the total number of companies engaged in the production of professional filter presses reached 186, of which only 17 had registered capital of more than 50 million yuan. There are 322 companies with a registered capital of less than 10 million yuan, accounting for about 95%. Therefore, there are many small enterprises, the processing scale of products is small, the types of products are small, and the quantity of high-end products is small. These enterprises often rely on low prices to compete. Large companies constitute barriers to their core competitiveness in terms of technology, R&D, industry, equipment, and sales channels. Their profitability is stronger than that of small and medium-sized enterprises, and their core competitive advantages are solid.
Import substitution is accelerating, and the domestic concentration trend is clear. Domestic filter press companies have obvious advantages in terms of sales price, operating cost and response speed. Jingjin Environmental Protection Division is a leading company in the filter press industry. The company's profitability is the industry leader. In 2019, the company's gross profit margin reached 34.75%. In addition, the domestic diaphragm filter press technology is relatively mature and can replace imported filter plates. This is conducive to cultivating the consumption habits of downstream companies to purchase and use domestic filter presses, promote the development of domestic filter presses, and benefit major domestic manufacturers The formation of central tendency.
Environmental protection innovation advantages in the development of filter press market
The application of automatic plate and frame filter press in the field of environmental protection is mainly to treat municipal sewage sludge, tap water sludge, industrial wastewater sludge, river and lake sludge, etc.; in the coal industry, it is mainly used for the dehydration of coal slurry. With the continuous increase in quantity, the demand for plate and frame filter presses also increases; in the food industry, the importance of the starch industry in the national economy has also increased the demand for filter presses. The demand for hydraulic automatic plate and frame filter presses in various industries is showing a trend of rapid growth.
The automatic plate and frame filter press industry wants to achieve sustainable development and maintain a competitive advantage, and comprehensively optimize the internal management, technological innovation, product quality, service system, marketing strategy and other aspects to enhance the stamina of the enterprise. In the design and manufacture of the plate and frame filter press, an increased level of automation will be achieved, which can automatically complete the entire filtration process without manual assistance, realize automatic start, automatic feed, automatic discharge of faults, automatic discharge, automatic stop, etc.
With the introduction of environmental protection policies and increased efforts to control environmental pollution, there is huge room for the development of the automatic plate and frame filter press industry. Therefore, driven by environmental protection policies, fully automatic plate and frame filter press companies should promptly change their development concepts, actively absorb foreign corporate ideas, management and operating methods, and introduce technology and talents to drive the overall industry to become bigger and stronger.
The principle is to use a special filter medium to dilute the liquid from the mixed liquid to control energy consumption during the production process and reduce subsequent pollution. The reinforced polypropylene plate and frame filter press is an environmentally friendly equipment suitable for various fields. With the characteristics of high pressure resistance and durability, it is more economical and environmentally friendly. The new environmental protection policy promotes the development of the plate and frame filter press industry, and the plate and frame filter press manufacturers will usher in a good time for development next.
In work, the filter plate is often moved back and forth repeatedly, which is subject to a pressure. Keep the filter chamber in a high-pressure working range all the year round, which will easily cause the filter plate to break or the filter plate handle error. If the plate and frame filter press is going to be out of service for a long time, there are some operations that need to be strictly followed, mainly to allow the equipment to run quickly and work normally after the "holiday" is over. Before long-term use, one is to check the filter plate, and the other is to change the hydraulic oil.
At present, the plate and frame filter presses on the filter press market are divided into multiple uses and multiple models. Each style of plate and frame filter press has different functions and different roles in work. Plate and frame filter presses are widely used in chamber filter presses and plate and frame filter presses. It is understood that the food, chemical, pharmaceutical, oil refining, sewage treatment and other industries need to use plate and frame filter presses to separate solids and liquids.
Compared with the plate and frame filter press, the superior technology is the advantage of the chamber filter press. It has the advantages of less loss when feeding, good sealing performance, uniform washing of the filter cake, low moisture content, and uniform pressure in each filter chamber, which is not easy to damage the plate. , Basically applicable to all solid-liquid separation industries and other characteristics. There are also disadvantages such as low efficiency, poor filtering effect, and easy damage to the filter plate.
The future development of the plate and frame filter press will be more difficult, and the road of development and survival must adapt to the following trends. Plate and frame filter presses must adapt to the changing trend of the filter press market development, grasp the direction of the filter press market, and think of customers. To improve the overall performance of the equipment, in addition to the stable operation of the equipment and the improvement of the filtering effect, the automation, humanization, convenience and greenness of the equipment must be further improved. The plate and frame filter press is energy-saving, low energy consumption, and environmentally friendly. The equipment will not produce secondary hazards during operation, and while achieving filtration and drying, it reduces the moisture of the filter cake. It makes great innovations in drying and breaks the development of traditional filter presses. Bottleneck.
Under the current background of increasing efforts in environmental protection, my country's plate and frame filter press enterprises should make full use of contemporary scientific and technological achievements, focus on researching new products urgently needed for the development of the national economy and national defense, and improve the quality and technical level of existing products. The urgently needed filter press equipment in food, medicine, urban sewage treatment and other industries forms a new growth point.
People’s growing consumer demand has also led to the development of the fully automatic plate and frame filter press market, but with that, in the face of the growing plate and frame filter press market, the fully automatic filter press industry is also constantly changing. The continuous innovation of products can meet the needs of the market. With the change of people's life and consumption concepts, the fully automatic plate and frame filter press has been continuously improved in accordance with the changes of the times.
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