Selection of concentrated sulfuric acid pump

The selection of concentrated sulfuric acid pump is a common problem in chemical industry practitioners, and concentrated sulfuric acid pump is used in many production processes, which inevitably involves the problem of type selection, such as improper selection, light ones can cause higher costs, more maintenance work, affect production, and heavy ones may lead to personal and property safety, so how to select the type correctly has become one of the important issues.

Case medium: 98% concentrated sulfuric acid.

Medium specific gravity: 1.84.

Medium temperature: room temperature.

Content of solid particles in the medium: 1% fine particles.

Transport flow design: 12 m3/H

Conveying head design: summary of 20 M selection:

1.Material: there are many materials that can withstand concentrated sulfuric acid, but the material I suggest is still fluoroplastic (polytetrafluoroethylene / F46), because this material not only has excellent corrosion resistance, but also its sealing and mechanical strength are also prominent. in order to ensure the safety and durability in the process of conveying concentrated sulfuric acid, fluoroplastic is determined as the material of concentrated sulfuric acid pump.

2.Pump type: conveying high specific gravity concentrated sulfuric acid with a specific gravity of 1.84, it is obvious that the magnetic drive pump is not the best choice, because the magnetic torque in the magnetic pump does not meet the requirements, it is likely to lead to adverse phenomena such as "demagnetization" or "heating" (unless the magnetic coupling is selected as a "rare earth magnetic cylinder" with high magnetic performance, but this increases the cost of the pump). Therefore, I suggest using centrifugal pump.

3.The problem of motor power: because the specific gravity of concentrated sulfuric acid is 1.84, we can calculate the actual shaft power of the pump according to a simple formula, and the actual shaft power = (water test) shaft power × specific gravity.

Therefore, it can be calculated that the motor power required for the pump is at least "1.9x1.84mm 3.496", so the motor power should be selected as: 4KW.

4.Machine seal selection: the original machine seal can be ignored, but it is mentioned in the case that there are 1% fine particles in the medium, so the machine seal had better choose the wear-resistant machine seal-cemented carbide machine seal, particle-resistant machine seal.

The difference between magnetic pump and shielded pump

1. The shielding pump directly uses the principle of the motor, and the energy consumption of the magnetic pump motor is transferred to the impeller through the internal and external magnetic steel (part of the energy is converted into the heating of the magnetic steel), so the efficiency of the shielded pump is higher than that of the magnetic pump in theory.

2. As can be seen from the structure, the biggest disadvantage of the shielded pump is that it is impossible to maintain (very difficult). In the process of use, whether there is a problem with the pump body or the motor, the user is basically unable to maintain it by himself. The repair of the magnetic pump is not much different from the ordinary pump. The motor bearing of the shielded pump is in contact with the medium, so it is difficult to guarantee its service life. Therefore, the shielded pump is not only difficult to maintain, but also difficult to repair, and its reliability can not be guaranteed (such as bearing faults can not be predicted, you can not detect and observe fault phenomena and precursors), shielded pumps can not find hidden dangers in operation, once there is a problem, it is fatal damage.

3. The thickness of the isolation sleeve of the magnetic pump is more than 3 times that of the shielded pump, so the tightness and reliability are more guaranteed.

4. The motor bearing of the shield pump is lubricated by the medium, the motor does not have a fan, and the heat dissipation of the motor is carried out by the internal circulation of the medium. This leads to a higher failure rate of the shielded motor. Magnetic pump motor is an ordinary motor, which dissipates heat by fan and is mature and reliable. But also because the noise of the magnetic pump is louder than that of the shielded pump.

5. The structure of the shielded pump is more compact, so it is smaller than the magnetic pump and saves space.

6. The shielded pump has no coupling, and the magnetic pump and the motor are connected through the coupling and need to be aligned.

7. Due to the problem of magnetic material, the maximum power of magnetic pump is lower than that of shielded pump, which leads to the limitation of magnetic pump in some heavy load applications caused by high flow rate and high pressure.

8. The magnetic pump is more applicable to the strong corrosive medium than the shielded pump, because its isolation sleeve is thicker (the thickening of the shielding sleeve of the shielding pump will affect the electromagnetic effect of the stator winding and the rotor winding).

9. The magnetic pump can not be used when the medium contains metal particles (such as iron filings), because the ferromagnetic material will be attracted by the magnetic steel, resulting in failure. And the shielded pump can be handled.

Which pump to choose to transport hydrochloric acid solution?

In the chemical industry, acid-alkali solution is the most common chemical substance, therefore, many friends in the chemical industry need to choose pumps suitable for transporting acid-base solutions. in fact, there is also a special category of chemical pumps in the pump industry. it is classified according to working conditions, and these chemical pumps can be used to transport various chemicals with different acidity and basicity. I would like to share with you a recent consultation we received: what kind of pump should you choose to transport hydrochloric acid solution? If you have questions about this, take a look at the following.

Hydrochloric acid transport, choose stainless steel water pump or fluoroplastic water pump, transport hydrochloric acid medium whether from the design or material are recommended to choose acid and alkali-resistant fluoroplastic chemical pump, fluoroplastic pump material has CFRPP/FRPP/CPVC/PCDF, these materials are super acid-resistant and strong alkali-resistant.

Polyacrylamide (PAM) is a synthetic polymer composed of repeating units of acrylamide. It is widely used as a flocculant, thickener, and binder in various industrial processes, including water treatment, papermaking, mining, and petroleum production. Here is an introduction to the physical and chemical properties of polyacrylamide:

1. Molecular Structure: Polyacrylamide is a linear polymer with a molecular weight ranging from a few thousand to several million Daltons. It consists of long chains of acrylamide monomers linked together by amide bonds (-CONH-). The structure of polyacrylamide can be modified by copolymerization with other monomers to incorporate specific properties.

2. Solubility: Polyacrylamide is highly soluble in water, forming clear and viscous solutions. It has the ability to absorb and retain large amounts of water, which contributes to its excellent water treatment properties. The solubility of PAM can be affected by factors such as molecular weight, ionic strength, and pH.

3. Ionic Character: Polyacrylamide can be classified into two main types based on its ionic character: nonionic and anionic/cationic. Nonionic PAM is electrically neutral, while anionic PAM carries negative charges and cationic PAM carries positive charges along the polymer chain. The ionic character determines the interactions of PAM with other substances and its performance in different applications.

4. Flocculation and Dispersion: Polyacrylamide exhibits flocculation properties, meaning it can cause the aggregation of suspended particles in a liquid. The polymer chains form bridges between particles, leading to the formation of larger, settleable flocs. This property is extensively used in water and wastewater treatment processes.

5. Rheological Properties: Polyacrylamide solutions display high viscosity, which is desirable in applications such as thickening and emulsion stabilization. The viscosity is influenced by factors like molecular weight, concentration, and temperature. PAM solutions can form gels under specific conditions, allowing them to act as thickening agents.

6. Stability: Polyacrylamide is stable under normal conditions, but its stability can be affected by factors such as temperature, pH, and the presence of oxidizing agents. High temperatures can cause the degradation of PAM, leading to a decrease in its performance.

7. Biocompatibility: Polyacrylamide is generally considered safe for use in industrial applications. However, its use in certain consumer products, such as cosmetics, may require additional scrutiny to ensure safety. It is important to follow proper handling and disposal practices to minimize environmental impacts.

Overall, the physical and chemical properties of polyacrylamide make it a versatile polymer with a wide range of applications in various.

In the realm of water treatment, a groundbreaking solution has emerged - the application of Moving Bed Biofilm Reactor (MBBR) technology. This innovative approach to wastewater treatment has proven its efficiency and reliability in various applications worldwide. But what role does plastic MBBR packing play in this process, and is it a game-changer?

MBBR systems utilize biocarriers to create an ideal environment for microorganisms to thrive. These biocarriers, often made of plastic, provide a large surface area for the formation of biofilms, which break down organic matter present in the wastewater. Traditional MBBR packing materials have been predominantly made of materials like high-density polyethylene (HDPE) and polypropylene (PP).

However, plastic MBBR packing introduces a new level of efficiency and effectiveness to the treatment process. The use of specialized plastic materials enhances the overall performance of the MBBR system, resulting in improved removal of pollutants and a higher treatment capacity. Plastic MBBR packing combines the advantages of durability, lightweight construction, and excellent biofilm adhesion properties.

China, with its booming water treatment industry, has emerged as a leading manufacturer of MBBR packing. Chinese companies are at the forefront of developing and producing plastic MBBR packing for water treatment applications. Their expertise and investment in research and development have led to the creation of advanced plastic MBBR packing options that outperform conventional materials.

One notable advantage of plastic MBBR packing is its resistance to clogging, which is a common concern in traditional systems. The design of plastic MBBR media promotes even distribution of wastewater and enhances oxygen transfer, preventing blockages and ensuring smooth operation even in high-load conditions. This result is longer maintenance intervals and increased process stability, saving both time and resources.

Another significant aspect is the scalability of plastic MBBR packing systems. The modular design allows for easy expansion or reduction of the treatment capacity, making it adaptable to changing demands. This flexibility makes it an ideal choice for both small-scale applications and large municipal projects.

Furthermore, plastic MBBR packing exhibits excellent resistance to corrosion, chemicals, and UV exposure. This durability ensures a longer lifespan of the MBBR media, reducing the need for frequent replacements and maintenance. Ultimately, the use of plastic MBBR packing not only improves the efficiency of the water treatment process but also reduces operational costs in the long run.

In conclusion, plastic MBBR packing has the potential to revolutionize water treatment processes. China’s prominence in manufacturing MBBR packing, coupled with continuous advancements in plastic technologies, has made it a key player in this innovation. The benefits of plastic MBBR packing, including enhanced efficiency, scalability, and durability, make it a compelling choice for water treatment applications worldwide. As we look ahead, the adoption of plastic MBBR packing will likely continue to grow, driving advancements in sustainable and efficient water treatment practices.

Are you a Plastic Random Packing enthusiast looking for tips and tricks to elevate your packing game? Look no further! In this article, we will share some expert advice on Plastic Ralu Random Packing Tower Packing. Whether you’re a beginner or a seasoned pro, these tips will help you achieve optimal results with your tower packing.

1. Choose the Right Packing Material

Selecting the appropriate plastic random packing material is crucial for optimal tower performance. Consider factors like chemical compatibility, heat resistance, and pressure drop. It’s important to understand the specific requirements of your application to make an informed decision.

2. Proper Installation

Ensure that the tower is clean and free from any debris before installing the plastic random packing. Make sure to carefully follow the manufacturer’s instructions for installation. Incorrect installation can lead to poor tower performance and decreased efficiency.

3. Optimize Packing Density

Maintaining the right packing density is essential for achieving efficient mass transfer and reducing pressure drop. Over-packing can lead to excessive pressure drop, while under-packing can result in limited mass transfer. Therefore, find the optimal balance by following the manufacturer’s recommendations for packing density.

4. Distribute Packing Uniformly

It’s important to distribute the plastic random packing uniformly throughout the tower. Uneven packing distribution can cause channeling, resulting in reduced efficiency. Use appropriate equipment and techniques to ensure an even spread of packing material.

5. Regular Inspections and Maintenance

Periodic inspections play a vital role in ensuring your tower packing performs optimally. Monitor for signs of fouling, damage, or any other issues that may affect performance. Additionally, develop a maintenance schedule to clean or replace the packing when necessary.

6. Manage Liquid and Gas Flow

Proper liquid and gas distribution is key to achieving excellent tower performance. Uneven liquid or gas flow can cause channeling or inefficient mass transfer. Consider using distributor trays or other devices to evenly distribute the liquid or gas throughout the tower.

7. Monitor Tower Performance

Regularly monitor tower performance by measuring key parameters such as pressure drop, temperature, and liquid holdup. Performing regular performance tests helps identify any issues or deviations from the expected performance. Make adjustments as needed to maintain efficient operation.

8. Consult with Experts

If you’re unsure about any aspect of your plastic random packing tower, don’t hesitate to seek advice from industry experts or manufacturers. They can provide valuable insights and recommendations based on their experience and knowledge.

In conclusion, Plastic Ralu Random Packing Tower Packing can greatly enhance tower performance when done correctly. By following these tips and tricks, you can ensure optimal performance, improve efficiency, and achieve better results. Remember to choose the right packing material, install it properly, maintain packing density, distribute uniformly, perform regular inspections and maintenance, manage liquid and gas flow, monitor tower performance, and seek advice when needed. Happy packing adventures!

The preparation of polyacrylamide involves a polymerization reaction of acrylamide monomer using a suitable initiator. Here are the main steps involved in the preparation process:

1. Monomer Selection: Acrylamide (CH2=CHCONH2) is chosen as the primary monomer for polyacrylamide synthesis due to its reactivity and ability to form long polymer chains.

2. Initiator Selection: A chemical initiator is required to initiate the polymerization reaction by generating free radicals. Common initiators for polyacrylamide include ammonium persulfate (APS) and N,N,N',N'-tetramethylethylenediamine (TEMED).

3. Polymerization: The polymerization reaction usually takes place in an aqueous solution. Here are the steps involved:

   a. Preparation of Monomer Solution: Acrylamide monomer is dissolved in water to create a monomer solution. Depending on the desired polymer properties, co-monomers or crosslinkers may be added to the solution.

   b. Initiator Addition: The initiator, such as APS and TEMED, is added to the monomer solution. APS decomposes in water to generate sulfate radicals, while TEMED helps initiate the reaction.

   c. Initiation: After adding the initiator, the reaction mixture is typically heated to a suitable temperature, often around 60-70°C. This initiates the formation of free radicals.

   d. Polymerization: Free radicals produced by the initiator react with acrylamide monomers, causing them to join together and form long polymer chains. The reaction proceeds until all the monomers are consumed or until terminated by adding a termination agent, such as ammonium persulfate or hydrogen peroxide.

   e. Post-Reaction Treatment: After the desired reaction time, the reaction mixture is often cooled and subjected to further processing steps, such as filtration, precipitation, or drying, to obtain the final polyacrylamide product.

It's important to note that the polymerization process can be modified by adjusting various parameters such as monomer concentration, initiator concentration, reaction temperature, reaction time, and the addition of crosslinking agents or functional groups, to achieve specific properties and tailor polyacrylamide for applications.

Horizontal centrifugal pump suitable for transporting phosphate

At ordinary times, attention should be paid to the rationality in the selection of phosphoric acid pump. The so-called reasonable selection of phosphate pump is to comprehensively consider the comprehensive technical and economic indicators such as the investment and operation cost of phosphoric acid pump unit and phosphoric acid pumping station, so as to make it in line with the principles of economy and application. The principle of acid resistance of most phosphate pumps is mainly due to the material of the pump. generally, phosphate pumps use non-metallic materials as the overflowing parts of the pump, such as "polyethylene, polypropylene, polyperfluoroethylene propylene, etc.", in which polyperfluoroethylene propylene (PVDF) is one of the good acid-resistant materials, which can basically resist the corrosion of any acid medium, so it is called plastic king.
It is necessary to meet the requirements of flow rate and head, that is, the operation point of the phosphoric acid pump (the intersection of the device characteristic curve and the performance curve of the phosphoric acid pump) is often kept in the interval, which saves power and is not easy to damage the parts.

Type selection of sodium hypochlorite dosing pump

Sodium hypochlorite, an inorganic compound with chemical formula NaClO, is a hypochlorite and is the most common "chlorine" bleach in household washing. Sodium hypochlorite is mainly used in bleaching, industrial wastewater treatment, papermaking, textile, pharmaceutical, fine chemical, sanitary disinfection and many other fields.

As one of the strong corrosion media, sodium hypochlorite pump is an important industrial raw material which is widely used. The corrosion degree of the material to the medium with different concentration and temperature is also different, so today we can choose from the following three aspects for the selection of sodium hypochlorite dosing pump:

1. The on-site working condition of sodium hypochlorite pump:
It is necessary to specify the on-site working conditions, such as the concentration of sodium hypochlorite, the working temperature, whether there are particles in the medium, as well as the flow rate and head to be satisfied in the whole work.

2. The pump structure suitable for sodium hypochlorite:
The pumps that can be used to transport sodium hypochlorite are: magnetic pump, self-priming pump, centrifugal pump, submerged pump. The specific type should be based on the concentration of sodium hypochlorite and other conditions, to choose to use self-priming pump or magnetic pump. Mabel magnetic pump without shaft seal design is completely leak-proof, but also according to the site installation environment to choose to use horizontal or vertical.

3. Material selection of sodium hypochlorite pump:
Basic plastics can be used, such as: PP, PVDF, ETFE (polytetrafluoroethylene) and other materials.

What is the difference between plastic-lined centrifugal pump and all-plastic centrifugal pump？

Plastic lined centrifugal pump and all-plastic centrifugal pump we have heard the most should be lined pump, mainly for the chemical pump flow parts and channel metal nesting, in the surface plating polytetrafluoroethylene plastic, to prevent the chemical pump due to the corrosion of the medium and damage the smoothness of the flow channel, while affecting the efficiency of the chemical pump, change the nature of the medium, The whole plastic pump is the whole pump head is made of polytetrafluoroethylene plastic casting, the plastics used in these two kinds of pumps are polytetrafluoroethylene material, which can effectively transport some acid alkaline, organic solvents, oxidants and other chemical solvents.

The common lining pump for the IHF series of corrosion resistant chemical centrifugal pump itself is suitable for negative 20℃~120℃ temperature conditions, can be a variety of concentrations of acid, alkali, oxidizing media transport, impeller and pump cover with metal insert external fluorine plastic, the pump body with metal shell lined with fluorine plastic, can withstand the weight of the pipeline while withstand mechanical impact. The shaft seal adopts external bellows mechanical seal, the static ring uses 99% alumina ceramic, and the moving ring is tetrafluoroidal filling material, which is characterized by good corrosion resistance and sealing, and does not need to disassemble the import and export pipes when the parts are replaced.

IHF centrifugal chemical pump, the pump head is made of fluorine plastic lining die, the main material is polymer material, F26 material, F46 material, fluorine plastic alloy material. Due to different materials, the price error is relatively large.