| 摘要 |
Method for thermochemical renovation of the heat engineering equipment restoring their efficiency close to the original one, consisting in filling the equipment at the first stage and for some time with heated circulating bath of ion exchange properties, and next in removing the solution remained after the reaction together with a suspension of partially dissolved sediments into the sewage system, and in rinsing the equipment with water and compressed air, and next, at the second stage, in introducing new solution dissolving the sediments which contains, apart from active hydronium ions, corrosion inhibitors, and after the dissolution reaction in introducing the solution into a storage reservoir, where the solution is neutralized with milk of lime and next removed to the sewage system, and in filling the empty heat engineering equipment again with water and performing hydropneumatic rinsing until dissolved sediments are eliminated from the equipment, characterized in that at the first stage in the renovation liquid acting as an ion exchange agent there is 100dm<3> of water, from 0.5 to 6.0 kg of NaOH, from 2.0 to 6.0 kg of Na3PO4 and 2 kg of a detergent which heated to 95 degrees C and remaining in a closed circulation is kept in the equipment for 48 hours and next it is removed to the sewage system, and the heat engineering equipment is rinsed with the use of hydropneumatic method for two hours under pressure equal to 0.2 MPa, and next, at the second stage, the renovation - dissolving liquid is introduced into the equipment, which liquid contains from 0.5 to 3.0% by weight of hydrochloric acid and 0.05% by weight of methylthiourea which remains circulating constantly in the equipment for 12 up to 24 hours, preferably 15 hours, and next it is introduced into storage reservoir for the purpose of neutralization with milk of lime and removed to the sewage system, and the heating equipment is again filled with water and air mixture and rinsed under pressure equal to 0.3 MPa until dissolved sediments in the form of suspension are removed from the equipment.
|
