Aug 09, 2016
Singapore Yisi High Cell Reactor is widely used in gas absorption equipment. It can also be used as a gas and liquid phase reactor. Since the liquid flows down the surface of the packing, a liquid film is formed on the surface of the packing to react with the gas phase, so the liquid phase The amount of the subject is small. Suitable for transient, fast and medium speed reactions. For example, catalytic hot alkali absorbs CO2, water absorbs NOX to form nitric acid, water absorbs HCl to form hydrochloric acid, and absorbs SO3 to form sulfuric acid, etc., usually using the Singapore Yisi high cell reactor. The Singapore Yisi high cell reactor has the advantages of simple structure, pressure drop, easy adaptability to various corrosive media and difficulty in causing solution foaming.
The Singapore Yisi high cell reactor also has a number of shortcomings. First, it can't remove heat directly from the tower. When the heat of reaction is high, it must be heated in the form of sensible heat by increasing the amount of liquid spray. Second, because of the problem of the lowest wetting rate, in many cases. Self-circulation is required to ensure basic wetting of the packing, but this self-circulation destroys the principle of countercurrent. Despite this, the Singapore Technic Cell Reactor is a common device for gas-liquid reactions and chemical absorption. Especially in the case of atmospheric pressure and low pressure, when the pressure drop becomes the main contradiction and the reaction solvent is easy to foam, the Singapore Yisi high cell reactor is particularly suitable.
There are many ways to plant cells in Singapore's Yisi high cell reactor. It can be said that there are many different methods. Today, Xiaobian simply introduces three common preparation methods:
1. The adsorption method, also known as the carrier binding method, is based on the electrostatic, surface tension and adhesion between the charged microbial cells and the carrier, so that the microbial cells are fixed on the surface and inside of the carrier to form a biofilm. The adsorption method can be divided into physical adsorption method and ion adsorption method. The method is simple to operate, and the immobilization process has little effect on cell activity.
2. The embedding method is to embed the microorganisms in a limited space such as tiny lattices or microcapsules of the gel, and the microorganisms are wrapped in the space and cannot leave, and the substrate and the product can freely enter and exit the space, and commonly used Gel embedding method. Fiber embedding method and microcapsule method. The embedding method has little effect on cell activity, and it is a commonly used method for immobilizing cells.
3. The cross-linking method is a reaction group such as a shuttle group with a surface of a microbial cell by using an agent containing two or more functional groups. The amino group and the like react to crosslink the cells into a lattice structure to form an immobilized mesh, and the binding force is a covalent bond. The immobilization method has a large loss of microbial reactivity, and the cross-linking agent used is mostly expensive, so the application is limited.
The Singapore Yisi high cell reactor should be designed so that as long as the sludge layer does not expand to the precipitator, sludge particles or flocculent sludge can slide back into the reaction chamber. It should be recognized that sometimes the sludge layer expands into the precipitator. A bad thing. Conversely, the expanded mud layer present in the precipitator traps the dispersed sludge particles/flocs while it also removes the biodegradable dissolved COD. An important device is a three-phase separator, which is installed at the top of the reactor and divides the reactor into a lower reaction zone and an upper precipitation zone. In order to obtain a satisfactory sedimentation effect on the sludge flocs/granules in the upflow in the precipitator, the first main purpose of the three-phase separator is to separate the biogas generated from the sludge bed/layer as efficiently as possible, in particular Under high load conditions, the reflector of the Singapore Yisi high cell reactor under the plenum is to prevent biogas from escaping through the gap between the plenums to the sedimentation chamber, and the baffle is also beneficial to reduce the reaction chamber. Liquid flotation caused by high gas production.
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