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since 2010

Xinxiang Dayu Filtration Equipment Co., Ltd. is a well-known enterprise that provides filtration solutions. The company is dedicated to the development of filtration technology, technical consultation......
2010Establishment time
8600Production plant area
1000registered capital
20Patent certificate

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Xinxiang Dayu Filtration Equipment Co., Ltd. is a filtration equipment enterprise that provides filtration solutions. The company is committed to the development, technical consulting, and technical services of filtration technology in the fields of gas, liquid, and oil, as well as the research and development, production, and sales of filters and filter cartridges.
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Diversified products

Diversified products

The main products of Xinxiang Dayu Filter Equipment Co., Ltd. include PP melt blown and wire wound series filter cartridges, microporous folded membrane filter cartridges, high flow filter cartridges, power plant condensate filter elements, natural gas coalescence separation filter cartridges, stainless steel filter cartridges, environmental sanitation vehicle specific filters, stainless steel security filters, and other products.
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Technological innovation

Technological innovation

The company has a fully enclosed clean room, production equipment, and a complete production process, as well as an innovative technical and research and development team, ensuring the quality of its products.
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After Sales

After Sales

The company adheres to the spirit of "Yu the Great's Flood Control", and "focus and concentration" are our endless pursuit goals. We participate in market competition with perfect products, reasonable prices, and thoughtful after-sales service. We sincerely welcome customers to visit and guide us, cooperate sincerely, and make our small contributions to the sustainable development of water resources and the improvement of the human living environment.
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Natural gas generator set - pre module filter element of pressure regulating station

1、 Technical parameters:Product Name: Pressure Regulating Station, Pre Module Filter CartridgeProduct specifications: 152 * 1000mm 152 * 736mmDesign pressure: 6.5MpaFiltering accuracy: 1-3 μ m2、 Design proposal1. Material selection:Because the filter element is a pressure regulating station and pre module filter element, the metal parts are made of stainless steel with good corrosion resistance, and the filter material is made of imported ultra-fine special glass fiber, which has a large pollutant holding capacity, long service life, good compatibility with various mixed gases, high filtration efficiency, and interception rate of 1-3 μ m impurities is higher than 99.99%. The sealing material is made of ultra-fine fiber compression felt, which has good oil aging resistance.3. Composition and working principle of filter elementComposed of inner lining skeleton, filter layer, and sealing layer.3.2 Working principle:The gas passes through the shell and is filtered through the filter layer to remove solid particles, impurities, aerosols, and other desulfurization impurities. The filtered clean liquid flows out of the inner hole and enters the filter outlet for subsequent system use. Impurities are regularly removed through the filter discharge outlet.The working principle diagram is as follows: 4. Design and calculation of filter support strengthAccording to the "Specification for Filtration and Separation Equipment in Gas Pipeline Engineering" and customer requirements, the working pressure of the filter is 4.6Mpa, the initial pressure drop of the filter element is 5Mpa, and the pressure difference when replacing the filter element is 0.6Mpa.
2020-08-13

The function and usage precautions of coconut shell activated carbon

Coconut shell activated carbon is a type of carbon with a developed pore structure, a large specific surface area, and adsorption capacity. The total surface area of each gram of activated carbon can reach over 1500 square meters. There are many types of activated carbon, which can be divided into plant-based carbon, coal based carbon, petroleum based carbon, bone charcoal, blood charcoal, and so on according to different raw materials; According to the manufacturing method, it can be divided into gas activated carbon and physical activated carbon; Chemical activation method charcoal, also known as chemical activation method charcoal; Chemical physical activated carbon; According to their appearance, activated carbon can be divided into powdered activated carbon, amorphous granular activated carbon, shaped granular activated carbon, spherical carbon, fibrous carbon, woven carbon, etc.Coconut shell activated carbon can be divided into gas-phase adsorption carbon, liquid-phase adsorption carbon, sugar use carbon, industrial carbon, catalyst, and catalyst carrier carbon according to their applications. Activated carbon has adsorption and catalytic properties, is insoluble in water and other solvents, and has physical and chemical stability. Except for high temperature contact with oxygen and reaction with strong oxidants such as ozone, chlorine, and dichromate, it is extremely stable under actual usage conditions. Due to its excellent properties as an adsorbent, activated carbon has a wide range of applications. What are the functions of coconut shell activated carbon1. Coconut shell particle activated carbon is commonly used in gas-phase adsorption, usually allowing the airflow to pass through the activated carbon layer for adsorption. According to the different states of the activated carbon layer in the adsorption device, there are several types of adsorption layers: fixed layer, moving layer, and flowing layer. However, in small adsorbers such as refrigerators and deodorizers in cars, adsorption relies on gas convection and diffusion. In addition to granular activated carbon, activated carbon fibers and activated carbon molded products are also increasingly being used in gas-phase adsorption.2. The air in instrument rooms, air conditioning rooms, basements, and underwater facilities often contains body odor, smoking odor, cooking odor, oil, organic and inorganic sulfides, corrosive components, etc. due to external pollution or the influence of human activities in enclosed environments, causing corrosion of precision instruments or affecting human health. Activated carbon can be used for purification to remove impurities.3. Coconut shell activated carbon can be used in chemical plants, leather factories, paint factories, and engineering projects that use various organic solvents. It contains various organic solvents, inorganic and organic sulfides, hydrocarbons, chlorine gas, oil, mercury, and other harmful components to the environment. Activated carbon can be used for adsorption before discharge. The gases emitted from atomic energy facilities contain radioactive substances such as krypton, xenon, iodine, etc., which must be adsorbed clean with activated carbon before being discharged. The flue gas generated by the combustion of coal and heavy oil contains sulfur dioxide and nitrogen oxides, which are harmful components that pollute the atmosphere and form acid rain. They can also be adsorbed and removed by activated carbon.4. There are still many uses of coconut shell activated carbon for refining gases, such as gas masks, cigarette filters, refrigerator deodorizers, car exhaust treatment devices, etc., all of which utilize the adsorption properties of activated carbon to remove toxic, harmful, or odorous components from gases.5. Thiol removal activated carbon: used as a carrier for gasoline desulfurization (deodorization) catalysts in catalytic units of refineries.6. Vinylon catalyst activated carbon: used in the chemical industry as a catalyst carrier, such as as as a catalyst carrier for vinyl acetate.7. Monosodium glutamate refined activated carbon: used for decolorization and refinement of mother liquor in the production process of monosodium glutamate, and can also be used for decolorization and refinement of fine chemical products.8. Special activated carbon for cigarette filters: used in cigarette filters in the cigarette industry to remove toxic and harmful substances such as tar and nicotine from cigarettes.9. Citric acid specific activated carbon: used for decolorization, refining, and deodorization of various acids such as citric acid, amino acids, and cysteine.10. Special activated carbon for direct drinking water treatment: Activated carbon is used for deep water purification of household direct drinking water, water treatment in waterworks, and bottled water production.Precautions for using coconut shell activated carbon1. Coconut shell activated carbon should not be mixed with hard substances during transportation, and should not be stepped on to prevent the carbon particles from breaking and affecting the quality.2. Storage should be carried out on porous adsorbents, so during transportation, storage, and use, it is necessary to absolutely prevent water immersion, as a large amount of water will fill the active voids after immersion, rendering them ineffective.3. Coconut shell activated carbon should be used to prevent tar substances from entering the activated carbon bed during use, in order to avoid blocking the pores of the activated carbon and losing its adsorption function. Effectively remove coke equipment and purify gas.4. When storing or transporting fire-resistant activated carbon, direct contact with a fire source should be avoided to prevent ignition. During the regeneration of activated carbon, oxygen should be avoided and the regeneration should be thorough. After regeneration, it must be cooled with steam to below 80 ℃, otherwise the temperature will be high and the activated carbon will spontaneously ignite when exposed to oxygen.
2020-08-01

Recycling and refurbishing power plant condensate filters and elements

   There is only one reason for power restrictions and outages: excessive power consumption! The sudden increase in electricity consumption has already exhausted the annual power generation plan quota.Why did the national electricity consumption suddenly surge? Ultimately, it is due to the impact of the pandemic. The spread of the epidemic has devastated the global economy, especially in processing kingdoms like India and Vietnam, where manufacturing has stagnated due to the out of control of the epidemic. So naturally, global orders flooded into China, and massive orders were thrown over, forcing Chinese manufacturing companies to work overtime and accelerate production at full capacity! While engaging in large-scale production, electricity consumption suddenly surged by 20.6%.At this point, you may be surprised. Isn't it a good thing to focus on production? Massive orders promote the prosperity of foreign trade exports, which is a great thing! Why did you suddenly stop shouting?The reason is correct, but at this moment, foreign trade is facing an awkward situation, mainly divided into:1. The massive printing of money by the United States has caused global inflation and skyrocketed commodity prices;2. The price of sea freight has increased sevenfold;3. The price increase of small commodities cannot compare to the price increase of bulk commodities.In the international trade system, there is an iron law: "Whatever China buys, it rises; whatever China sells, it fallsIn 2021, coal prices doubled, and 70% of China's electricity generation relies on thermal power generation, which of course relies on coal. The skyrocketing price of coal has resulted in extremely high electricity generation costs for us.However, the prices of the products we produce at full capacity have not increased much, and coupled with the 7-fold increase in shipping prices, the products we export may even be at a loss.What's the use of taking on so many foreign trade orders when we use the high cost electricity we generate to produce unprofitable goods? This not only consumes our manpower and material resources, but also creates a huge crisis, so of course we need to stop it immediately!Some small manufacturing enterprises, in order to make a profit of a few dollars, constantly increase their production efforts and constantly raise inventory. If the epidemic eases and foreign production resumes, our products will have to fall into our own hands, causing overcapacity, which is a big problem! Enterprises may suffer losses at the slightest, and in severe cases, they may go bankrupt in batches.**The determination to restrict electricity is to force those enterprises with high investment, high energy consumption, and high emissions to complete industrial upgrading, actively step out of their comfort zone, and avoid falling into crisis.We cannot work overtime, it takes time and effort to earn such a small amount of money; Others can easily control the prices of commodities and make huge profits!Power rationing, endure temporary pain, and consider the overall situation!
2021-09-25

How to maintain the reverse osmosis equipment system during shutdown

Once the reverse osmosis system is in operation, it should be kept in a stable operating state as much as possible. Each start and stop of the system involves changes in flow rate and pressure, which generate mechanical stress on the membrane components. Therefore, it is necessary to minimize the frequency of system startup and shutdown as much as possible, and normal startup and shutdown should also proceed smoothly. So how should the reverse osmosis water treatment equipment be maintained and serviced after it needs to be stopped for a period of time? The maintenance measures vary depending on the length of downtime. 1、 Normal shutdown steps of the systemOpen the production water discharge valve, open the bypass control valve of the high-pressure pump, reduce the inlet flow of the system, and slowly open the concentrated water control valve to reduce the pressure to around 30-40 psi. Close the corresponding dosing device and maintain this low-pressure flushing until the conductivity of the concentrated water is consistent with that of the inlet water. After 5-10 minutes of low-pressure flushing, the system will shut down.2、 Suspension for 0-2 daysShort term shutdown can be carried out according to normal shutdown procedures, but low-pressure flushing must be performed, and in order to prevent bacterial growth, it is necessary to flush every 24 hours.3、 Suspension for 2-25 days1. After shutdown, ensure that the pressure vessel is filled with pure water produced by R0, and close all inlet, concentrate, and production valves to prevent membrane element drying and microbial growth;When the temperature is above 20 ℃, it is necessary to rinse again every 12 hours; When the temperature is below 20 ℃, rinse again every 24 hours;3. For surface water or water sources with high microbial pollution, a solution containing 1.0% sodium bisulfite prepared from R0 water should be used to flush the reverse osmosis system. If the membrane elements are soaked in this solution at the same time, the effect will be better and the repeated flushing cycle will be correspondingly extended;During system shutdown, the temperature should be maintained between 5 ℃ and 45 ℃. Low temperature is beneficial for the preservation of membrane components, but at the same time, the system should be prevented from freezing and freezing.4、 Long term shutdown for more than 25 days1. Follow the normal shutdown procedure and rinse the system with product water at low pressure. At the same time, perform a chemical cleaning and sterilization treatment. After cleaning, rinse the system with R0 produced water at low pressure until the conductivity of the concentrated water is consistent with that of the inlet water;2. Prepare a protective solution containing 1.0% sodium bisulfite using reverse osmosis to produce pure water. Use a chemical cleaning system to cycle and rinse the membrane components, eliminate air from the pressure vessel, and completely immerse the membrane components in the protective solution to prevent them from drying out. Close all inlet valves, concentrate valves, and production valves to prevent air from entering and rendering the protective solution ineffective;3. Check the pH value of the protective solution every week. When the pH is less than 3, the protective solution should be replaced in a timely manner;During system shutdown, the temperature should be maintained between 5 ° C and 45 ° C. Low temperature is beneficial for the preservation of membrane components, but at the same time, the system should be prevented from freezing and freezing.

What material pipeline should be used for reverse osmosis equipment?

The selection of pipeline materials for reverse osmosis equipment should consider both internal and external factors. The internal factors are the corrosion caused by water quality on the pipeline, while the external factors are the operating environment. The operating environment of reverse osmosis equipment determines the external corrosion of pipelines. If the operating environment is good, surface coatings (such as paint or galvanizing) are generally used. The corrosion of pipelines by water quality should consider residual chlorine, chemicals, pH value, temperature, etc.Stainless steel pipelineThe basic advantage of stainless steel is its good resistance to general corrosion. Stainless steel rarely undergoes current corrosion and stress corrosion damage, but it is prone to pitting and crevice corrosion. Pitting represents local corrosion of the metal, causing concave holes on its surface. If the chromium oxide passivation layer is damaged, chloride ions will attack the exposed metal to form pitting. Gap corrosion is related to pitting corrosion caused by a small amount of static water around small holes, gasket surfaces, sediments, and cracks under screws. To avoid pitting and crevice corrosion of high-pressure pipelines in membrane systems, the following suggestions are suggested:For general water sources, 304 stainless steel can be used;1. When the salt content of the raw water is between 2-5000PPM, it is recommended to use 316 stainless steel with a carbon content of less than 0.08%;2. When the salt content of the raw water is between 5-7000PPM, it is recommended to use 316L stainless steel with a carbon content of less than 0.03%;3. When the salt content of raw water is between 7-30000PPM, it is recommended to use 904L stainless steel with a molybdenum content of 4% -5%.316 stainless steel is the second widely used steel type after 304, mainly used in the food industry and surgical equipment. Adding molybdenum element gives it a special corrosion-resistant structure. Due to its better resistance to chloride corrosion compared to 304, it is also used as "ship steel". SS316 is commonly used in nuclear fuel recovery devices.UPVC pipelineThe characteristics of UPVC pipes are as follows:1. Strong corrosion resistance: Compared with general cast iron pipes and galvanized pipes, PVC pipes have extremely strong corrosion resistance, can withstand strong acids and alkalis, and will not rust or scale. Don't worry about the phenomenon of "red water" when using.2. Low fluid resistance: The inner wall of the PVC pipe is very smooth. Its surface roughness coefficient is only 0.009, and the fluid resistance is very small, so it will not excessively reduce water pressure.3. High mechanical strength: UPVC pipes for water supply have good water pressure resistance, impact resistance, and tensile strength. They can withstand 110 atmospheres of pressure for 1 hour at room temperature without breaking.4. Sanitary and non-toxic: UPVC pipes for water supply use adopt a unique green and environmentally friendly lead-free formula system instead of the traditional composite lead salt formula system, which will not damage water quality or affect human health.5. Lightweight texture and easy installation and construction: The density of PVC pipes is one-fifth of that of general cast iron, making transportation, loading, and unloading convenient. And special adhesive or elastic sealing components are used for bonding, making installation and construction simple and fast.6. Temperature adaptability of water supply pipes: UPVC pipes for water supply should be used within the temperature range of room temperature. Low temperature, increased brittleness, unfavorable for installation and construction; The temperature is too high, the tensile strength decreases, and the water pressure resistance decreases.7. Good water tightness: After 15 minutes of adhesive bonding, the bonding strength can reach 12.5/C or above, and there will be no significant decrease after many years of use. The sealing ring at the joint of the elastic sealing element also has a considerable service life compared to PVC pipes, and there is no concern of aging and water leakage.

Water treatment, detailed explanation, must read for environmental protection industry!

The methods of water treatment include physical treatment and chemical treatmentWith the continuous improvement of human life, the problem of eutrophication of water bodies with nutrients such as ammonia nitrogen and phosphorus, and the gradual improvement of sewage discharge standards by the Environmental Protection Bureau, the traditional "primary treatment" and "secondary treatment" water treatment technology and equipment that have been used for many years are no longer suitable for the treatment requirements of high turbidity and high concentration sewage today. Moreover, the treatment process is long, the system is large, and a large amount of odor is emitted. In order for operators to meet the new emission standards, they need to invest heavily in expanding the existing sewage treatment system, increasing the land occupation, high cost of sewage treatment equipment, and high post maintenance costs. However, traditional sewage deep treatment and recycling technology systems (such as activated carbon filtration, microporous filtration, permeable membrane purification, etc.) have high investment and high post maintenance and operation costs, which are difficult for too many operators to afford.Water treatment includes two types: sewage treatment and drinking water treatment. In some places, sewage treatment is further divided into two types, namely sewage treatment and reclaimed water reuse. The commonly used water treatment agents include polyaluminum chloride, polyaluminum ferric chloride, basic aluminum chloride, polyacrylamide, activated carbon, and various filter media.The processing process of raw water (raw water) to meet the water quality requirements of finished water (domestic water, production water, or dischargeable wastewater).When processing wastewater, it is called wastewater treatment. The purpose of wastewater treatment is for the discharge (discharge into water bodies or land) or reuse (see wastewater treatment, wastewater reuse) of wastewater.Impurities in water and treatment methods: Impurities in water include carried coarse substances, suspended solids, colloids, and dissolved substances. Coarse substances such as floating aquatic plants, garbage, large aquatic organisms, gravel in wastewater, and large debris in rivers. In water supply engineering, coarse impurities are removed by the facilities of the water intake structure and are not included in the scope of water treatment.As for domestic water (or urban public water supply), raw water taken from high-quality water sources (well water or well protected water supply dedicated reservoirs) only needs to be disinfected to become finished water; Raw water from general rivers or lakes must first be removed of sediment and other impurities that can cause turbidity, and then disinfected; Raw water with severe pollution also needs to remove pollutants such as organic matter; Raw water containing iron and manganese (such as some well water) requires removal of iron and manganese. Domestic water can meet the water quality requirements of general industrial water, but industrial water sometimes requires further processing, such as softening, desalination, etc.By adopting a reasonable water treatment process and combining it with deep water treatment, the treated water can meet the standards of GB5084-1992 and CECS61-94 for water recovery, and can be recycled for a long time, saving a lot of water resources.The commonly used sewage treatment technologies include biochemical methods, such as Activated Sludge Process, Fixed Biofilm Processes, Combined Biological Processes, etc; Physical and chemical methods, such as Granular Media Filtration, Activated Carbon Adsorption, Chemical Precipitation, Membrane Processes, etc; Natural treatment methods, such as Stabilization Ponds, Aerated or Facultative Lagoons, Constructed Wetlands, Chemical Color Coarse Resin Treatment, and Nanofiltration Membrane Separation Principle.The principle of dissolution and diffusion: The permeate dissolves in the membrane and diffuses and transfers along its driving force gradient, forming a chemical equilibrium between phases on the surface of the nanofiltration membrane. The transfer form is: energy=concentration o mobility o driving force, so that a substance must overcome the osmotic pressure when passing through the membrane.The reason why the nanofiltration process has ion selectivity is that there are negative charged groups on or in the nanofiltration membrane, which interact with each other through electrostatic forces to hinder the permeation of multivalent ions. The possible charge density of nanofiltration membrane is 0.5-2meq/g.Separation principle of nanofiltration membraneNanofiltration membrane is mainly used to remove solute particles with a diameter of about 1 nanometer (nm) and a cut-off molecular weight of 100-1000. It is mainly used in the field of drinking water to remove trihalomethanes intermediates, odors, chromaticity, pesticides, synthetic detergents, soluble organic matter, hardness components such as Ca and Mg, and evaporation residues.Processing technologyThe purified water treatment process depends on the quality of the raw water.If it is ordinary surface water, it needs to be sterilized and flocculants added before entering the above process.
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