The Stenner Mixing tank series is designed for retrofitting existing tank systems. Its sealed design eliminates the need for suction line guards. This series of tanks is ideal for use with chemical manufacturers’ recommended injection systems. Its simple installation process requires only the installation of safety screws and requires no modification. Its features include an easy to use user interface and a high-capacity safety pump. Moreover, it has been designed for crystallization applications.
Mixing tank design for crystallization applications
The design of mixing tank series for crystallization applications is similar to that of solids suspension applications, although some advanced crystallizers incorporate unique design elements to meet specific requirements. For example, some crystallizers use jacketed round vessels instead of jacketed rectangular tanks, while others use draft tube technologies. Whatever your crystallization process requirements, ProQuip can assist you in designing the ideal crystallizer tank.
The process of crystallization requires a small active volume and a means of supersaturation. These two elements can be achieved with different types of equipment. A typical crystallisation tank features a vortex mixer, rotor-stator, or impinging jets. These types of mixers have small active volumes, allowing them to provide excellent micromixing and supersaturation values. Moreover, their short mixing times can help in achieving a consistent control of nucleation.
A properly mixed zone is essential to minimize undesirable effects, such as crash nucleation, oiling out, and agglomeration. To avoid this, subsurface addition of antisolvent is important. The feed pipe diameter and antisolvent rate must be carefully matched to avoid oversaturation. Using too-large a pipe diameter can result in reverse flow and plugging.
The CMC series of crystallization tanks are available in capacity ranges from ten to fifty m3. The tanks are made of 316L stainless steel and are ideally suited for crystallisation of whey, permeates, and lactose juices. The tanks can also be equipped with ultra-clean vents, which can help protect the product from external contamination.
The design of the mixing tank series for crystallization applications shares many similarities with the design of a mixing tank for liquid blending applications. The mixing tank is fitted with a heat source, usually a pipe coil or plate. The tank is either jacketed or not, and is typically round in shape. Jacketed mixing tanks are recommended when there is a high possibility of scraped wall agitation, but they can be used in most applications.
Features of a side entry tank mixer
A side entry tank mixer offers a number of advantages over a conventional tank mixer. These advantages include a faster mixing speed and greater homogeneity. It also eliminates the need for manual adjustment. The mixing swivel assembly is made of stainless steel and features an elastomer seal.
Side entry mixers are ideal for use in storage tanks with low headroom. They also reduce the cost of large tank installations compared to top entry mixers. Another benefit is that they eliminate the need for long shafts that are necessary in tall tanks. This means less maintenance and less sludge accumulation.
A side entry tank mixer can be designed with high efficiency impellers for efficient mixing. These impellers have a high thrust-to-power ratio, which ensures maximum mixing efficiency. These impellers are available in carbon steel or 316ss materials. They can also have an imbalanced design to suit the application.
Side entry tank mixers can be installed in either cluster or distributed configurations. They are suitable for large process operations. They feature advanced sealing mechanisms that prevent leakage. In addition, they can be retrofitted to existing systems. An optional shutoff device makes it easy to maintain the seal without emptying the tank.
Side entry mixers are an excellent option for large process operations and applications where top entry is not practical. They deliver exceptional efficiency and performance for every tank size. Aside from their high efficiency, side entry tank mixers are easy to maintain and can save a great deal of time. A side entry tank mixer can also help you to avoid manual cleaning procedures. These mixers also offer ease of maintenance and are ideal for many types of applications.
One of the most common mixer applications is in the oil and gas industry. This application involves blending liquids within storage tanks, creating product in refineries, and preventing bottom sludge from settling at the bottom of a tank. Another common use is as part of a water treatment plant to prevent contamination from waste water.
Sealed design eliminates need for suction line guards
These mixing tanks are designed with a sealed design to eliminate the need for suction line guards and provide high volume output with quick turnaround. The constant mixing helps to keep the chemical in solution and prevent it from settling. Available in 7.5, 15, and 30 gallon sizes, the models are UL/cUL listed and are ideal for intermittent applications.
Thermal stratification
The mixing tank series is a key component in water treatment facilities. The temperature gradient within the tank may be as small as 0.1degC. A temperature gradient this small can promote the growth of bacteria and reduce the water quality. Hence, it is crucial to properly mix the water in the storage tank to prevent this from happening.
Several one-dimensional models have been proposed to model mixing in thermal stratification storage tanks. Some of them assume uniform mixing throughout the tank, while others allow spatial variation in mixing intensity. The published models were developed by adjusting the parameters until they achieved qualitative agreement with measured profiles. However, the literature does not provide quantitative criteria for evaluating these models.
In addition to using active mixing, a tank can be equipped with a solar-powered mixer. This device produces a jet of cool water from the bottom, which forms the core of a toroidal flow structure that moves the water throughout the tank. Disinfectants can be added safely and reliably through this mixing system, reducing the risk of nitrification and thermal stratification.
The GridBee(r) is a compact, submersible electric mixer that uses high-volume flow to mix water. It uses solar energy for power and has a deep-cycle battery backup. A solar-powered mixer consists of an intake that is an inch above the tank floor. The unit automatically adjusts its speed in order to create a complete bottom-to-top mix.
Active mixing eliminates issues with sampling inconsistency
The problem with sampling inconsistency is usually a result of differences between the raw materials used in the production of a specific product. In order to avoid product inconsistency, plants must ensure that all components are purchased and tested to meet the same specifications. This can be a challenge since some ingredients have strict specifications while others are tolerant to a variety of physical parameters. Either way, proper mixing is essential to avoid product inconsistency.
While mixing is a process that is more difficult to observe, good observations are critical to evaluating the process and identifying improvements. While mixing is the most fundamental operation in a production facility, it is also one of the most difficult to measure. Many variables, including tank size and metal construction, can make direct observation of mixing conditions difficult or impossible.
The FVM and FEM with consistent stabilization methods both predict a nearly equal amount of mixing at the outlet of a mixer. This may be acceptable if the Pe number of the cells is moderate. However, inconsistency in sampling methods will result in different concentration profiles.
The grid size can also affect the performance of mixing in a micromixer. For a single-stage micromixer, a cell size of 1010 can lower the Pe number to 2. The AD equation does not reflect the instabilities around cell Pe number of two.