Imported Venturi steam injector

Imported Venturi steam injector(also known as steam injector or steam jet heat pump), is a fluid power pump that does not have mechanical transmission or mechanical working structural components. It creates a low-pressure area in the throat by driving the energy of steam under high pressure. This low-pressure area utilizes the pressure difference to draw in low-pressure steam. Subsequently, high-pressure and low-pressure steam are mixed in the diffuser, and the output pressure is higher than the original low-pressure steam, thereby achieving a pressure increase of low-pressure steam. This process is based on rigorous principles of fluid mechanics, aiming to effectively utilize low-pressure steam and reduce energy waste through energy conversion and transfer.

constitute

Injector, also known as jet pump or vacuum pump. A pump that utilizes the jetting effect of high-pressure working fluid to transport fluids. It consists of a nozzle, a suction chamber, a contraction section, a diffuser, and an expansion section. For the sake of smooth operation, a vacuum chamber (also known as a suction chamber) is installed at the throat; In order to ensure sufficient mixing of the two fluids, there is a mixing chamber behind the vacuum chamber. During operation, the working fluid is sprayed out from the nozzle at a high speed, creating low pressure in the vacuum chamber, causing the conveyed liquid to be drawn into the vacuum chamber and then into the mixing chamber. In the mixing chamber, high-energy working fluid and low-energy conveyed liquid are fully mixed to exchange energy with each other, and the speed gradually becomes consistent. When entering the diffusion chamber through the throat, the speed slows down and the static pressure rises, achieving the purpose of conveying liquid.

working principle

The working principle of the steam jet vacuum cleaner is that the working steam forms a high velocity through the nozzle, and the steam pressure energy is converted into velocity energy, which mixes with the inhaled gas in the mixing chamber and enters the expansion chamber. In the expansion chamber, the velocity gradually decreases and the velocity energy is converted back into pressure energy, resulting in a significantly higher pressure of the mixed gas discharged by the vacuum cleaner than the pressure in the suction chamber. The most suitable working medium for the injector is water vapor, as it provides a large amount of energy and can be condensed into water in the inter stage condenser before being discharged, without increasing the suction capacity of the subsequent injector. The pressure of the working steam varies with the conditions of the factory system, and is generally used0.784—1.079MPa(cease)The lowest working steam pressure actually used by domestic refineries is0.392MPa(cease)The temperature of the working steam should exceed the saturation temperature of the steam at the corresponding pressure30At a temperature of ℃, a steam separator should be installed near the jet vacuum cleaner on the working steam pipeline to ensure that the steam entering the nozzle does not carry water droplets, in order to avoid severe erosion of the jet vacuum cleaner by wet steam at high speeds.

Parameters that users need to provide

1Working medium, pressure (gauge pressure, absolute pressure)

2, (bypass) suction medium, pressure (gauge pressure, absolute pressure), temperature, flow rate

3Flow rate, pressure (gauge pressure, absolute pressure), medium, temperature at the inlet end of the working medium (nozzle)

4Mixed discharge outlet flow rate, pressure, temperature

5Material

Imported Venturi steam injectorpurpose:

The Venturi steam injector is widely used in industrial fields powered by steam, such as power, chemical, textile, food, papermaking, petroleum, and thermal power, mainly to increase low-pressure steam pressure. Namely, using steam of higher pressure to inject steam of lower pressure, to obtain steam of a certain intermediate pressure For example, improving the parameters of heating steam, recovering steam waste heat, and recovering flash steam from high-temperature condensed water can achieve significant energy-saving effects.

1、Power plant: Many large and medium-sized enterprises have their own thermal power plants, which are supplied with steam by the extraction and back pressure of steam turbines. However, due to the fixed extraction pressure (back pressure) of the steam turbine design, there are often situations where the steam supply of the steam turbine cannot meet the production needs. A Venturi steam injector can be used to increase the pressure to meet the user's requirements by using boiler fresh steam injection to extract or exhaust steam from the steam turbine.

2、Exhaust steam and steam waste heat recovery: using higher pressure steam to inject lower pressure steam, obtaining steam at a certain intermediate pressure to achieveThe purpose of "low quality, high use" or waste heat utilization.

3、 Condensed water and flash steam recovery: Recovering condensed water and flash steam generated by steam heating in the production process, increasing steam pressure, and saving energy and consumption.

4、Adding a spray cooling device at the outlet end forms a set of temperature and pressure reducers with injection function.

5、In the process, recycling and reusing exhaust gas reduces emptying and saves steam consumption