SU1286245A1 - Apparatus for treatment of sediments of natural and waste water - Google Patents

Abstract

The invention relates to apparatus for the treatment of natural and sewage sludge and reduces the energy consumption for sludge treatment and the metal intensity of the apparatus. The apparatus comprises a hopper 1, a filter sheet 3 lying on a conveyor belt 2, a freezing chamber 9 with a heat insulating casing 11 and nozzles 10, where coolant from the evaporator 25 of the cooling mashine flows, a defrosting chamber 12 with nozzles 13, where the coolant from the condenser 27 flows. The filter sheet 3 with sediment is moved over the freezing chamber 9 and the defrosting chamber 12, then coming off the conveyor belt 2 to the drainage plate 14. Full dewatering is carried out using a moisture-proof tape 16, 18 and 19 support rollers. The regeneration of the filtering web is carried out in the unit 22 with the help of nozzles 23. 1 c. Ff. 1 il. S (L 17 18 16 9 18 y 00 O5 to 4i SP

Description

The invention relates to the treatment of sediments formed during the purification of natural and waste waters, and may find application in public utilities and industry in the treatment of difficult dehydration sediments by the method of artificial freeze-thawing.

The aim of the invention is to reduce the energy consumption for the treatment of sludge and the metal intensity of the apparatus.

The drawing shows the proposed apparatus for processing natural and sewage sludge.

The apparatus has a sludge hopper 1, a conveyor belt 2, a filter belt 3, a driven roller 4, a driving roller 5 of a transport belt 2, a driving roller 6 of the filtering sheet 3, an actuator 7, a tension roller 8, a freezing chamber 9 with nozzles 10, and heat insulating casing 11 installed in the upper part of the conveyor belt, defrosting chamber 12 with nozzles 13, drainage plate 14, filter collection 15, moisture-proof tape 16, guide roller 17, squeezing rollers 18, support rollers 19, sludge removal unit with nozzles 20 and brushes 2i, node 22 regeneration with nozzles 23 connected to the defrosting chamber 12, a tank 24, a refrigerating machine including an evaporator 25, a compressor 26 and a condenser 27 connected through a filtrate collector 15 to the regeneration unit 22.

The dehydrator contains free filtration units and a pressing filter, the free filtration unit is equipped with a drainage plate 14 located under the filter cloth, the filter pressing unit has squeezing rollers 18, a guide roller 17 covered with a common moisture-proof tape and located above the filter cloth, and supporting rollers 19, installed under the filter sheet.

The device works as follows.

The initial sludge from reservoir 24 is fed to bupker 1, with which it is applied as a thin layer to the filter cloth 3 lying on the transport belt 2. By cooling the belt 2 with coolant coming from the evaporator 25 and evenly distributed over the bottom surface of the belt 2 by the nozzles 10, the blade 3 is cooled and the sediment deposited on it is cooled as the tape 2 and the blade 3 move together above the freezing chamber 9, closed by a heat insulating casing 11 installed in the freezing chamber neither

With the passage of the tape 2 and the blade 3 above the chamber 12, the frozen sediment is thawed due to the irrigation of the lower surface of the tape by the coolant flowing from the condenser 27 and distributed over the surface of the tape by nozzles

13. After passing through the defrosting chamber, the tape 2 is fed to the roller 5, and the sheet 3 to the drainage plate 14 of the desiccant. Due to the forces of gravity part

The free water released during the thawing of the cage is discharged through the filter sheet and the drainage plate into the filtrate container 15. The final dewatering is carried out by a filtering unit consisting of a moisture-proof tape 16,

pressed roller rollers 18 to the canvas 3, and support rollers 19. The guide roller 17 provides uniform tension of the belt 16. The movement of the belt 16 is carried out by moving the fabric 3. After dewatering, the fabric 3 with sediment passes over the nozzles 20, from which compressed air is supplied and then goes to the roller 6 where the dried sludge is removed by the brushes 21. Next, the web is regenerated by the nozzles.

23. In order to intensify the regeneration process, heat from the condenser 27 is supplied to the sludge removal unit.

The tension of the web 3 is controlled by the roller 8, and the tape 2 by the roller 4. The movement of the belt 2 is carried out by the roller 5, and

blades 3 - roller 6, the rotation of which is driven by a common drive 7. In the case of stopping the drive 7, the deposit from the tank 24 to the hopper 1 stops and it is emptied. Pressure

filtering can be changed by changing the pressure of the rollers 18. Heat removal from the coolant and heat supply to the coolant is carried out by heat exchange with the coolant circulating in the system of the refrigerating machine. The normal mode of freezing and thawing of the sediment is carried out by changing the temperature and consumption of heat carriers, which, in turn, are supported by the operation of the cooling machine.

40

Claims (1)

Invention Formula five . Apparatus for processing sediments of natural and waste waters, including a conveyor belt, a refrigerating machine, a sludge hopper and a freezing chamber with cooling nozzles installed in the upper part of the conveyor belt, a defrosting chamber with heat transfer agent, a dehydrator with filter sheet, a collection filtrate assembly Sludge Q, a regeneration unit connected to a defrosting chamber and through a filtrate collector with a refrigerating machine, characterized in that it is equipped with an installed in the chamber in order to reduce energy consumption for sludge treatment and metal intensity of the apparatus. 5 freezing with a heat insulating jacket, successively installed a drainage plate located under the filter sheet, coming down from the conveyor 3Л tape, filtering unit, endless waterproof tape, In this case, the defrosting chamber is located in an bending squeeze-out and guiding rollers at the upper part of the conveyor belt. ki mounted above the filter sheet 2. The apparatus according to claim 1, characterized in that, and the support rollers mounted under that the filtering unit is made in the filtering web.