SU679531A1 - Apparatus for regenerating waste solutions - Google Patents

Description

(54) DEVICE FOR THE REPRODUCTION OF SPENT

SOLUTIONS. This goal is achieved due to the fact that the sludge removal unit is set as separate pallets with perforated walls and two perforated bottoms sealed with a tubular skeleton, and also due to the fact that in the vertical tubes of the skeleton on the side facing the inside of the pallet , fulfilled. holes in FIG. 1 shows a sectional regeneration device; in fig. 2 - the same plan view; in fig. 3 .- sectional construction of the pallet; in fig. 4 is a section A-A in FIG. 3; in fig. 5 - section BB in FIG. 3. The device has a capacity of 1 rectangular shape in plan with double walls, forming a shirt 2, filled with BOY. On Ana tank 1 installed pallets 3 so that they cover the entire area of the tank. The beams are fastened on the sides of the tank on racks. 4 dl pawned on pallets 3 when drying the sediment. The container 1 has a folding double-leaf or sliding cover 5 with a slot 6 for the passage of suspensions from 7 from the pallets 3. The lifting and lowering of the pallets 3 is performed by the hook 8 of the workshop crane. The container 1 has a float discharger 9. To maintain the temperature of the solutions in the regeneration process at the necessary level, as well as to accelerate the drying of the sludge when the solution is drained, capacity 1 is equipped with a heating system: with heaters 1O, steam coils or tubular electric heaters. For the supply of cooling water to the jacket 2, there is a pipe 11, to drain water from the jacket — pipe 12. The pallet 3 consists of a tubular frame 13, which serves simultaneously as an air manifold, and has four vertical pipes 14 with holes 15 at the four corners. air purge than provided. mixing the peer thief before its regeneration and drying the precipitate at the end of the process. The side walls 16 of the pallet 3 have openings 17, are covered from the inside by filtering mesh 18 and are designed to filter the sediment - separating the liquid phase with crc solid. The pallet 3 has two perforated bottoms: an internal 19 with hinges 20, a spring 21 for pressing the bottom from a vertical and a latch 22 for fixing it in a vertical position and outwardly a folding bottom 23 with hinges 24 having a locking device 25 for fixing, the bottom in a closed position horizontal exposure. Bottoms 19 and 23, as well as walls 16, have openings 17 and are covered with filtering mesh. Or cloth 18 For supplying air from the factory network to the pallet there is a single detachable (autovalve) 20 and flexible sleeve 27. For hanging on squirrel 4, the pallet has a hook 28, and for lifting and transporting with a workshop crane, a bracket, 29. The device works as follows. The hollows 3 are mounted on the bottom of the tank 1 with the hook 8 of the workshop cargo crane, while the inner bottoms 19 of the pallets 3 are placed in a vertical position and held by the hook 22. The spent solution developed to its maximum aluminum content (not suitable for herbs). - lees), is pumped into the tank 1. In the process of pumping the solution is cooled with cold water supplied to the jacket 2 of the tank 1 through the nozzle 11, to the required regeneration temperature. After heat exchange, water from the scrub is diverted through pipe 12. When diluted with water, the solution is stirred by supplying air to the pallets with flexible sleeves 27. After a certain amount of sludge is deposited on the outer bottom 23 of the pan (the lighter as the heavier component of the solution is deposited first) (e.g., wire-running) acting on the latch 22, the inner bottom 19 of the pallet 3 under the action of the spring 21 is pressed to the horizontal position of the stop in the layer of the settled sludge. Then there is the process of self-decomposition of the solution with the precipitation of aluminum hydroxide on the inner bottom 19. According to the oxidation process of regeneration. " the enrichment of the liquid phase (clarified solution) using the float discharge device 9 is drained or pumped out without stirring into a working or spare bath at a low suction rate in the drain device. The sludge and regeneration sediment remain in the pallets 3. With the help of the hook 8 of the workshop crane, the pallets 3 are raised from the bottom & capacious

ti 1 n are suspended on beam 4. Next, the sludge is dried in suspended pallets. In order to accelerate drying, the precipitate r is blown with air through the holes in the pipes 14. Air is supplied by a flexible hose from the workshop pneumatic network through a quick-release coupling (autovalve) 26 provided on each container.

The alkaline liquid collected from the bottom of the tank 1 is pumped out and fed into the working or spare bath. Further, in the tank 1, an increased temperature is created by turning on the heating elements 1O and the sludge is further dried.

After drying, the pallets 3 by the workshop crane are delivered to the place of unloading to a dump truck or other transport for export to storage or disposal sites.

Sludge and aluminum hydroxide are discharged separately. First, the naruz bottom 23 is opened and the slurry in the double bottom space is discharged. After that, the inner bottom is opened .19 and the regenerated aluminum hydroxide is unloaded.

Alternatively, drying of the precipitate may be carried out in a separate drying chamber located adjacent to the containers 1.

Since self-decomposing descalers for regeneration, which in most cases have not one but two or more regenerators, it is possible to use replaceable sets of pallets that are rearranged for drying from one regenerator to another. In this case, the duration of drying the sludge and sediment can be increased to a maximum equal to

the duration of the process of self-decomposition, which does not take up for drying the device released from the solution for regeneration. In this case, there will be 2 sets of pallets at the same time: one in the regenerated solution, the other (being dried) is suspended above the solution. At the same time, the flowing down sediment suspension will stimulate the self-depression of the solution, forming additional crystallization centers in the solution.

Thus, the proposed device allows simultaneous regeneration of alkaline aluminates solutions, as well as drying aluminum hydroxide.

Claims (2)

1. A device for the regeneration of waste solutions, such as alkaline aluminate, containing a tank having a heating system, a mixing node and a sludge removal unit with a filter element, which is different in order to separate and precipitate products of different specific gravity separately and simultaneously their drying, the site removal of sediment is made In the form of individual pallets with perforated walls and two perforated bottoms fastened with a tubular frame. 2. A device according to claim 1, characterized in that holes are made in the vertical tubes of the frame on the side facing the inside of the pallet. four-/) ll and wrigle 5-6 t 1b. Y / y 5