An important step in wastewater treatment is to remove stones, sand, grease, etc. contained in wastewater by mechanical treatment, such as screens, sedimentation or air flotation. Only in this way can further processing be carried out. The network decontamination machine can be widely used in large flow water treatment places such as urban sewage treatment, water plant intakes, rainwater pumping stations , cooling water intakes of power plants, etc. Network decontamination machine is also a kind of sewage treatment equipment. , and it can remove the coloring effect is also ideal. So we need to get to know this type of equipment together. The peripheral transmission mud scraper is mainly seen in the following aspects. 1. Working principle
We useWe will use the rotating grid decontamination machine, generally to intercept and remove various forms of debris in the fluid. The mechanical grid has such a function mainly because of its unique equipment. rotating grid chains. Driven by the gear motor, the rake tooth chain of the equipment will rotate in the direction of the countercurrent flow. When the rake tooth chain moves to the upper part of the equipment, due to the guiding effect of the pulleys and curved rails, a relatively self-cleaning movement will occur between each set of rake teeth. In this way, most of the materials will be solid. removed due to the gravity relationship and fell. The remaining part will be cleaned by the reverse movement of the cleaner. 2. Performance characteristics
Since the rotating grid decontamination machine is an automatically operating equipment, it can be seen that itsn degree of automation is relatively high, so it has advantages in separation efficiency, energy consumption, corrosion resistance, etc. Comparatively advantageous. And because the overload protection device is installed on the equipment, it can ensure safe and stable operation even if no one is watching. In addition, according to the different needs of different users, the operating interval of the rotating grid decontamination machine can be adjusted arbitrarily to achieve periodic operation. In addition, this type of machine also has many functions, which significantly reduces the risk of breakdowns, thereby simplifying maintenance work. 3. Scope of application
It is mainly used in wastewater treatment, such as tap water industry, power plant water inlet, etc. It can also be used as a screentakes center stage in wastewater treatment processes in textile, food processing, papermaking, leathermaking and other industry equipment. We see that its field of application is very broad. 4. Technical parameters and selection (1). Equipment specifications and rake teeth
Equipment specifications are divided into gsly300-3600 types according to the width of the machine. If the machine width exceeds 1800mm, it will be configured as a parallel machine. The rake tooth grid set is divided into various specifications such as 1mm, 3mm, 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, etc. Selection is based on water flow, lift height, total solid-liquid separation volume, and particle shape and size of the separated material. Pick and choose different materials at the same time. (2). Equipment length specifications
Can be lengthened arbitrarilybased on user needs and actual usage.
The steam condensing equipment in the power plant is mainly the condenser! It also comes with a vacuum pump for vacuuming!
A heat exchanger that condenses turbine exhaust steam into water, also called a rehydrator. Condensers are mainly used in steam turbine electrical appliances and are divided into water-cooled condensers and There are two types of air-cooled condensers. In addition to condensing the steam turbine exhaust steam into water for reuse in the boiler, the condenser can also establish and maintain a vacuum at the steam turbine exhaust steam.
According to the different steam condensation methods, condensers can be divided into two types: surface type (also called bulkhead type) and hybrid type (also called cont type).act). In a surface condenser, vapor separated from the cooling fluid is condensed into liquid on a cooling wall (usually a metal tube). The cooling fluid can be water or air. Water-cooled surface condensers are divided into single flow (Fig. 1) and double flow (Fig. 2) according to the cooling water flow mode. In a mixing condenser, vapor is condensed into a liquid while being mixed with a cooling fluid. The condensed vapor may be water vapor or the vapor of other substances.
Single flow condenser, double flow condenser, water cooled surface condenser are mainly composed of shell, tube bundle, hot well, a water chamber and other rooms. Exhaust steam from the turbine enters the casing through the neck, condenses into water on the cooling tube bundle and accumulates in the wells hot, then is pumped by the condensate pump. Cooling water (also called circulating water) enters the cooling tube bundle from the inlet water chamber and is discharged from the outlet water chamber. In order to ensure high vacuum and good heat transfer effect in the condenser when condensing steam, it is also equipped with air extraction equipment, which continuously extracts air and other non-condensable gases escaping into the condenser. Air extraction equipment mainly includes water jet air extractors, steam jet air extractors, mechanical vacuum pumps and combination vacuum pumps, etc.
The air in the air-cooled surface condenser passes horizontally or naturally ventilated outside the tube bundle using a fan, while the steam flows to the inside the tube bundle and condenses into water. In order toTo improve heat transfer outside the tube, this type of condenser uses externally finned tubes. Its back pressure is much higher than that of a water condenser.
There are two types of hybrid condensers: spray type and plane jet type. In the spray condenser, the cooling water is atomized into droplets; In the flat jet condenser, the cooling water comes into contact with the turbine exhaust steam in the form of a film. Typically, a plane jet structure is used because it has a higher vacuum and can vent all non-condensable gases.