Dust removal equipment refers to equipment that separates dust from flue gas, also called dust collector or dust removal equipment.
The application of dust removal equipment technology is closely related to the industrialization process in China. The dust removal equipment generally includes mechanical dust collectors, wet dust collectors, electrostatic precipitators and bag dust collectors. The comparison of the technical performance of the four dust removal devices is shown in the figure below:
1, mechanical dust collector is the use of dust gravity sedimentation, inertia or centrifugal force separation of dust, dust removal efficiency is generally below 90%, dust removal efficiency is low, low resistance, the advantage is to save energy.
2. The wet scrubber uses the gas-liquid contact scrubbing principle to separate the dust contained in the dust-laden gas into the liquid to remove the dust in the gas. Its dust removal efficiency is slightly higher than mechanical dust collectors, but it can easily cause secondary pollution of the washing liquid.
3, electrostatic precipitator is to dust gas through the strong electric field, so that the dust particles charged, when it passes through the dust removal electrode, with positive / negative charge particles are respectively negative / positive electrode plate adsorption, thereby removing the dust in the gas. Electrostatic precipitators have higher dust removal efficiency, but their dust removal efficiency is greatly affected by the specific resistance of the dust, which can easily lead to unstable dust removal efficiency. Since the 1990s, electrostatic precipitators have been widely used in the treatment of soot pollution, such as thermal power generation, cement kilns and other high temperature, large smoke volume, and more complex working conditions.
4. Bag filter is the use of fiber filter to capture solid particles in dust-containing gas to form a filter dust cake, and filter dust cake to further filter fine dust particles, in order to achieve the purpose of efficient dust removal. The bag type dust removal equipment can stably achieve high dust removal efficiency, the dust emission can reach within 5mg/m3, and the dust removal efficiency is not affected by dust and other dust characteristics such as resistance. In general, dust with a particle size of less than 10 microns (ie, inhalable particles) has a greater impact on human health, and baghouses have a high separation efficiency for inhalable particles. The range of application of bag filter in the treatment of normal temperature flue gas (<120°C) pollution is gradually expanding. With the further development of high-temperature filter materials and pulse cleaning technologies, bag filter is dealing with high temperature with excellent dust removal performance. In the field of high-concentration flue gas treatment, it has been more and more widely used.
The Knock Sensor is located on the engine block, cylinder head or intake manifold. This is because its function is to sense vibrations caused by engine knock or detonation. The PCM uses this signal to alter the ignition timing and prevent detonation. It will compare this information with its preset tables to identify a valid knock or ping. If a ping is sensed, it will retard the ignition timing to protect the engine from this damaging pre-ignition.
