| 摘要 |
FIELD: railway transport. ^ SUBSTANCE: invention relates to systems of heating and draining of high-viscosity products from railway tanks on trestles furnished with centralized pressure manifold with hot product. According to proposed method, pressure manifold of hot product is used at heating and draining of high-viscosity products from tanks as source of hot product. At initial stage of discharge, with pump switched off, closed circuit is filled with hot product from manifold. Said circuit includes suction pipeline connected with bottom part of tank, pump and pressure pipeline connected with bottom part of tank. Then circulation of product in closed circuit is set by means of pump with subsequent draining of product by means of pump into intake manifold with simultaneous delivery of hot product from pressure manifold into bottom part of tank. Again circulation of product in closed circuit is set, with simultaneous delivery of hot product from pressure manifold along second pressure pipeline into upper part of tank with subsequent draining of product into intake manifold and delivery of hot product to bottom part of tank. Product draining into intake manifold and circulation of product in closed circuit are repeated until cold product in tank is completely replaced by hot product, after which complete draining of product into intake manifold is carried out. Device for implementing the method is proposed. ^ EFFECT: reduced service expenses, provision of drain of hot product both through lower drain valve and through upper hatch. ^ 6 cl, 9 dwg |
