Preventing dust is the focus of safe production and environmental protection in feed mills. Dust is produced in many aspects of feed production, such as the transport of materials. Crush, mix, sieve, package, etc. When the dust and air are mixed to a certain concentration, an open flame will cause a dust explosion. People who are in an environment with a lot of dust for a long time will seriously affect their health. If the dust falls on the equipment, it will cause the electrical equipment to malfunction and cause an accident. Therefore, the condiment plant must take measures to control the dust.
The important principle of dust control in feed mills is “mainly closed, supplemented by suctionâ€. First, the dust-generating machinery and equipment should be sealed as much as possible, and then the dust-removing wind net should be designed and arranged in appropriate parts. Select the type of dust removal device. After normal work, it is necessary to regularly maintain the dust removal equipment to ensure its good running condition.
At present, feed mills are often used. Dust collector and bag filter. The centrifugal dust remover separates the powder in the high-speed mixed airflow from the dust-containing air by centrifugal force to achieve the purpose of dust removal, and the preparation is simple and the separation efficiency is high. In order to improve the dust removal efficiency, the feed mill often uses two or four centrifugal dust collectors of the same size in parallel, and the capacity is the sum of the capacity of the centrifugal dust collector. The bag filter is a purification device that filters dust in a gas using organic fibers, inorganic fibers, and an adhering dust layer thereof. The dust removal efficiency is high and will not corrode. However, its large volume and high equipment investment make it easy for the wet dust to clog the crust, and its filter cartridge needs regular maintenance and replacement.
In order to effectively control the diffusion of dust, it is necessary to select the dust removal point where it is most likely to generate dust.
Feeding port: It is easy to generate dust during the feeding process. One pulse dust collector can be set in each feeding port, and the dust removing cover of the lowering port is directly placed. In this way, it can be used as dust for feeding or as suction for the base of the feeding hoist, so as to achieve the effect of feeding and dust removal.
At the pulverizer: usually the pulverizer discharge port is connected with the material seal continuation flower, and the material sealing auger reverse reverse pulsing a pulse dust collector can simultaneously achieve the suction and dust removal problems of the pulverizer.
Add small materials: small materials because of the small amount, it is not easy to participate in automatic batching, in the production process. Add it separately. This dust is special. The point is fine grain size and easy to dust. It can be used as a small material adding machine (SBLMa4 type), which can not only add small materials, but also solve dust leakage, which effectively guarantees the quality of feed products.
Silo group: Large and medium-sized feed mills have high silos, and the materials are easy to dust when entering the warehouse. Negative pressure facilities should be installed for treatment. For a combined silo group, the raised dust can be collected through one or two suction points through the communication in the upper part of the silo. The general practice is to set 1 point in the warehouse to be crushed, 2 points on the batching bin, 1 point in the grain bin, and 1 spot in the finished product warehouse, which are combined into the respective dust removal wind nets. The suction volume can be determined according to the size of the silo, and then the pulse dust collector is configured. When using this method for dust control, it must be ensured that there is material in all the batching bins, otherwise the accuracy of the batching scale will be affected.
Other places: In the area of ​​raw material cleaning and finished product packaging, the suction point should also be designed to be incorporated into the combined wind network.
Each suction point should reach a certain amount of suction and wind speed. When the suction volume is constant, the larger the suction port is, the smaller the wind speed is. The smaller the suction port is, the larger the wind speed is. There is a range of air volumes and wind speeds required for each point of dust collection. Minimize air volume while meeting dust control. Wind speed to reduce energy consumption and prevent the room from forming a vacuum. When Ding Yi design and equipment are installed, a control valve should be installed at the appropriate position of each suction pipe to adjust the wind speed and air volume in the air duct.
Generally speaking, each feed processing workshop has a central dust collector. Some dust removal points are far away and the process route is long. Therefore, the air duct should be laid as vertical as possible to reduce the number of curved and horizontal pipe sections and shorten the length of horizontal pipelines. In order to prevent the pipeline from being blocked by the accumulated dust, the interface of the pipeline should prevent air leakage.
Independent wind network design: independent air network should be used for high concentration and trace components. It should not be added directly to the compound feed, and should be diluted and added in small proportions.
Air venting arrangement: The suction port of the dust suction device should be facing the place with the most dust. In order to avoid excessive material being extracted, the suction port should not be located near the area where the material is in the agitated state or in the airflow of the powder.
Thiocyanate (also known as rhodanide) is the anion [SCN]−. It is the conjugate base of thiocyanic acid. Common derivatives include the colourless salts Potassium Thiocyanate and Sodium Thiocyanate. Organic compounds containing the functional group SCN are also called thiocyanates. Mercury(II) thiocyanate was formerly used in pyrotechnics.
Thiocyanate is analogous to the cyanate ion, [OCN]−, wherein oxygen is replaced by sulfur. [SCN]− is one of the pseudohalides, due to the similarity of its reactions to that of halide ions. Thiocyanate used to be known as rhodanide (from a Greek word for rose) because of the red colour of its complexes with iron. Thiocyanate is produced by the reaction of elemental sulfur or thiosulfate with cyanide
Thiocyanate[4] is known to be an important part in the biosynthesis of hypothiocyanite by a lactoperoxidase.[5][6][7] Thus the complete absence of thiocyanate[8] or reduced thiocyanate[9] in the human body, (e.g., cystic fibrosis) is damaging to the human host defense system.[10][11]
Thiocyanate is a potent competitive inhibitor of the thyroid sodium-iodide symporter.[12] Iodine is an essential component of thyroxine. Since thiocyanates will decrease iodide transport into the thyroid follicular cell, they will decrease the amount of thyroxine produced by the thyroid gland. As such, foodstuffs containing thiocyanate are best avoided by Iodide deficient hypothyroid patients.[13]
In the early 20th century, thiocyanate was used in the treatment of hypertension, but it is no longer used because of associated toxicity.[14] Sodium nitroprusside, a metabolite of which is thiocyanate, is however still used for the treatment of a hypertensive emergency. Rhodanese catalyzes the reaction of sodium nitroprusside with thiosulfate to form the metabolite thiocyanate
Our main Thiocyanates are Sodium Thiocyanate, Potassium Thiocyanate, ammonium thiocyanate.
Thiocyanate
Sodium Thiocyanate, Potassium Thiocyanate,ammonium thiocyanate
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