FR2864952A1 - Treatment procedure for agricultural or industrial effluents containing chemicals uses closed circuit with pump, filter, electrolysis tank and evaporation - Google Patents

Abstract

The procedure uses a plant with a water tank (35) for washing out containers that have held chemicals, a pump (25) and an electrolytic tank (12) in which the filtered water is degraded by flocculation. the tank contains electrodes (06) fed by a direct current converted from the mains alternating current in a control unit (28) that maintains a constant amperage during the electrolysis process. The treatment process operates in a closed circuit, with the filter taking out the flocculated materials and other pollutants each time the water is pumped through it, and a second tank (33) allows a low pressure to be created in it so that water can be evaporated at a lower temperature and chemicals separated from it by gravity. The evaporated water is collected in a buffer tank (21), and chemicals are drawn off and destroyed.

Description

The present invention relates to a method and a device for

  treatment of agricultural or industrial effluents containing chemical substances (fungicides, insecticides, or phytosanitary). This treatment is carried out by successive operations of pumping filtrations, electrolysis and boiling of the water to separate the water and the chemical substances in suspension, in order to

  recover and isolate the chemical materials alone in a container, to be able to destroy them. The clean water being kept in another container for a next wash of effluents.

  Few things exist today in cleaning, destroying used packaging or destroying unused chemicals. There is no obligation on the part of the Ministry of the Environment 10 regarding the products used by winegrowers by

example.

  The accompanying drawings illustrate the invention: FIG. 1 represents the steps of the first phase of the process when the water is loaded with chemical effluents before the electrolysis that are: washing 35, pumping 25, filtration going 18, the filling of the electrolytic tank 12, the powering up of the electrolyser by the cabinet 28.

  FIG. 2 represents the stages of the return phase of the process when the water is separated from the water and the flocculated effluents which it is charged after flocculation, which are: flocculation 12, pumping 25, sludge discharge flocculated through the return filtration 18, the evaporation of the water 33, the filling of the clean water buffer tank 21, the evacuation of the chemical substances in the filter 18 and the low pressure apparatus 33.

  FIG. 3 represents the site seen from above. The references used in FIGS. 1, 2 and 3 are: (A) The flow sucked (water plus chemical powder) by the pump (B) The flow of water and effluents having undergone filtration.

  (B ') The volume of chemical substances retained in filter 18 (C) The flow of water and flocculated chemical substances (C') The volume of flocculated materials retained in filter 18 after another filtration (D) The flow clean water vapor after the apparatus 33 under low pressure to the buffer tank (D ') The volume of chemical materials remained at the bottom of the tank 33 after evaporation of water. (E) The water that is poured from the buffer tank 21 into the tank 35 for a new wash.

  (1) Level sensor (blocks the pump when the desired maximum volume is reached) (2) Continuous power supply cable for both electrodes (3) Copper squares (04) The plug and the bottom valve of the electrolytic tank (5) The bridge that carries the two electrodes.

  (6) Electrodes in the form of plates.

  (7) The lid of the electrolytic cell (8) The four air grids of the electrolytic cell 10 (09) The three glands (the cable of the probe level, the supply of the 2 electrodes) (10) The handle of the lid of the electrolytic tank.

  (11) The rim of the electrolytic tank allowing its lifting for transport.

  (12) Electrolytic tank (13) Electrolytic tank supply cable path (14) Panels (hazard and CE Markings) (15) Electrolytic cell cover padlock (16) Manometer pressure on the filter (17) The high inlet valve of the filter (18) The filter.

  (19) The low filter outlet valve (20) The pressure trap for removing air from the circuit (21) The buffer tank (22) The valve and the high drain of the buffer vessel for the admission of steam (23) The pump electrical box (on / off button and power converter) (24) The pump inlet connection (in the center of the fin disc) (25) The pump (26) The valve stopping the pump.

  (27) The high output connection of the pump (28) The electrical cabinet with the system for straightening the current (29) The fence encircling the space around the electrolytic tank (30) The concrete slab that supports the tank Electrolytic (31) Gate opening on the electrolytic tank (32) Hoses for connecting the devices (pump, filter, tanks) (33) The device under low pressure to evaporate the water (34) The output of the steam (35) Wash tank (36) Wash tank outlet valve (37) Safety padlock that locks the switch handle (closed) (38) Low valve for pumping clean water into The invention will be a tool for all users who want to stop unused chemical residues remaining on the walls or in the bottom of the containers, or even wash the spreading tools, or tractors ... Our principle is simple and can be implemented easily. We need an open plan space of about fifty square meters 30. A fence 29 will be arranged around with a 31 key-closing gate. There is a basin 35 for washing the containers or for recovering the dirty water flowing from an external washing. With the aid of a pump 25 this water charged with chemical effluents passes through a filter 18 so that it retains the suspended matter. Then the pump 25 sends the water a little less charged (since already filtered) in an electrolytic tank 12. A pair of electrodes 06 diffuse in this liquid a continuous electric current of high amperage to destroy and flocculate the chemical materials contained in this liquid. Once this electrolysis is complete, this water is sent by the pump 25 a second time through the filter 18, then in a device 33 which by a lowering of the pressure boils the water to a low enough temperature. This low temperature will prevent the formation of gas. The water vapor is collected in a buffer tank 21. The water can be reused for a next washing in closed circuit by transferring it into the pond 35. Chemical substances deposited in the filter and in the apparatus after boiling are seized or scraped for destruction or recycling.

  In summary, the present invention relates to a method for treating agricultural or industrial effluents containing chemical substances (fungicides, insecticides, or phytosanitary) in closed circuit characterized in that it comprises: a) washing the packages in the tank 35 serves to mix the remains of the chemical materials with the water of this tank (the flow A). Thus these packages become recyclable. b) Pumping with the pump 25 between the tank 35, the filter 18 and the electrolytic tank 12.

  c) The filtration stops some of the chemical materials (the flow B ').

  d) The pumping 25 sends the remaining effluent mixed with water (stream B) into the electrolytic tank 12 to be degraded by flocculation 12.

  e) An action through an electrical cabinet 28 rectifies the (alternating) electric current 5 of the EDF network in direct current to distribute it to the electrodes 06.

  f) Furthermore this action through an electrical cabinet 28 is designed to maintain a constant amperage throughout the duration of the electrolysis 12.

  g) Electrolysis to degrade suspended matter (mostly of chemical origin).

  h) Pumping 25 between the electrolytic cell 12 the filter 18 and the apparatus 33 under low pressure. I) Filtration 18 stops the flocculated materials (stream C ').

  j) The pumping 25 pushes this water still loaded with chemical materials into a reservoir 33 (stream C) in which the pressure can be lowered so as to evaporate the water at low temperature and separate by gravity the chemical materials (D-flow). ').

  k) The evaporated water is collected in a buffer tank 21 (the flow D).

  151) Chemical materials are taken at each point of filtration to be evacuated and destroyed (in the filter 18 and in the tank of the low-pressure apparatus 33 (the flow D ') after the evaporation of water.

  m) Cleaning of appliances and filters is done regularly.

  n) The clean water (stream E) contained in the buffer tank 21 is returned to the tank 35 for a new wash.

  This process provides an advantage over the water saving since the user will re-use the same water cleaned for each new cycle. It will not make any rejection in the environment.

  Thus not only are all the chemical substances stopped, and in addition that no rejection is spread in the environment, there is no more pollution.

  The device according to the invention is characterized in that it comprises by different materials that are: a) A tank 35 for carrying out the washing of the packages serves to mix the remains of the chemical materials with the water of this reservoir (the flow A) . Thus these packages become recyclable. b) A pump 25 between the tank 35, a filter 18 and an electrolytic tank 12.

  c) A filter 18 stops by filtration a part of the chemical materials (the flow B ').

  d) A pump 25 sends the remaining effluent mixed with water (stream B) into the electrolytic tank 12 to be degraded by flocculation 12.

  e) An electrical cabinet 28 rectifies the electric current (alternating) of the EDF network in direct current to regulate it to a constant amperage and to distribute it to the electrodes 06.

  f) A cabinet 28 is designed to maintain a constant amperage throughout the electrolysis 12. After a few hours of electrolysis of these chemicals mixed with water, a foam is formed on the surface, created by flocculation 12 .

  g) An electrolytic cell 12 provided with at least one pair of electrodes 06 h) The pump 25 between the electrolytic cell 12 the filter 18 and the apparatus 33 under low pressure.

  i) A filter 18 stops the flocculated materials (the flow C ').

  j) The pump 25 pushes the water still loaded with chemical materials into a reservoir 33 (stream C).

  k) An apparatus 33 in which the pressure can be lowered so as to evaporate the water at low temperature and to separate by gravity the chemical materials (flow D ') 1) A buffer tank 21 bored and at atmospheric pressure in which the water evaporated is collected (the flow D), then the water being cooled, resumes its liquid state (flow E). m) The pump 25 sends the clean water of the buffer tank 21 through the valve 38 to the container 35.

  And in particular that the vacuum is made in the apparatus 33 by suction of the air, in order to lower the pressure, once this device contains a certain volume of water loaded with chemicals. The action of lowering the pressure in the apparatus 33, results in the evaporation of the water contained in the apparatus 33 at a low temperature. The action of evaporating water with a pressure lower than atmospheric pressure will generate energy savings since the phenomenon of evaporation of water will take place at room temperature. The action of washing used packagings or packaging containing remains of unused chemicals will give the producers of these products the opportunity to reuse the same packaging or the same packaging several times. The effect of evaporating the water has the effect of separating by gravity the water vapor and the suspended matter in the water before its evaporation. The buffer tank 21 (in which the ambient pressure is equal to the atmospheric pressure) is buried to create cooling that will recondense the water vapor and add the volume of water corresponding to the volume of water already stored in the buffer tank . An electrical cabinet 29 via the relay of a level probe 01 interrupts the supply of the pump 25 when the volume of the effluents in the electrolytic tank 12 exceeds the desired level. The electrolytic tank 12, the filter 18, the trestles 05 are made of composite materials or fiberglass, and the trestles 05 carry the electrodes horizontally as low as possible at the bottom of the electrolytic cell 12. An open container 35, in which are washed packaging, bags or containers of chemicals, to facilitate the recycling of these packaging once clean. A pump 25 passes the water loaded with diluted powder chemicals through a filter 18. This filter 18 has a nozzle 17 at the inlet and a nozzle 19 at the outlet. A manometer 16 indicates the internal pressure of the filter 18, a strainer 20 serves to drain the filter 18. The level probe 01 stops the pump 25, if the volume of the previously filtered water exceeds the maximum level that can contain this tank. The cables 02 feed the electrodes 06. These electrodes 06 are placed at the bottom of the electrolytic tank 12 on the trestles 05. The cables 02 are tightened on the copper squares 03 by the clamps. The drain plug 04 and the bottom valve of the electrolytic tank are made of PVC. The lid 07 of the electrolytic cell must be closed when the electrolysis is working. The four ventilation grids 08 allow the ventilation of the tank 12. The three packings 09 allow the passage of sealed cables in the tank. The handle 10 of the lid of the tank 12 allows its animating. The rim 11 on the side of the tank 12 ensures the lifting of the tank 12 and its transport. The cable path 13 allows the passage of the cables on the concrete slab 30 safely. Signs 14 inform safety procedures and CE Marking. The padlocks 15 of the tank lid 12, and the handle of the disconnector 37 provides greater security. The buffer vessel 21 for collecting clean water. The valve 22 to close this container. The electrical box 23 to vary the electrical frequency of the pump 25, so its power. The input connector 24 of the pump, the outlet connector 27 can connect the pipes. The stop valve 26 of the pump to prevent its defusing. The fence 29 surrounding the space around the various appliances, tanks, filters ... The concrete slab 30 for any level wear. The portal opening on the site. The various pipes to connect the different parts of the device. The output of the water vapor from the apparatus 33 under low pressure. The wash basin 35 and its outlet valve 36. The pipes 32 serve to connect the different parts and appliances of the device. The water vapor through the valve 34 which flows into the buffer tank 21. The low valve 38 allows pumping clean water to fill the basin 35.

Claims (5)

1) Process for treating agricultural or industrial effluents containing chemical substances (fungicides, insecticides, or phytosanitary) in a closed circuit, characterized in that it comprises: a) The washing of the packages in the tank 35 is used to mix the remains of the chemical materials with the water of this tank (flow A). b) Pumping with the pump 25 between the reservoir 35 the filter 18 and the electrolytic tank 12. c) The filtration stops some of the chemical materials (the flow B '). d) The pumping 25 sends the remaining effluent mixed with water (stream B) in the electrolytic tank 12 to be degraded by flocculation 12. e) Action through an electrical cabinet 28 rectifies the electric current (alternating ) of the EDF network in direct current to distribute it to the electrodes 06. f) An action through an electrical cabinet 28 is designed to maintain a constant amperage throughout the duration of the electrolysis 12. g) Electrolysis to degrade the suspended matter (mostly of chemical origin). h) Pumping 25 between the electrolytic cell 12 the filter 18 and the apparatus 33 under low pressure. i) The filtration 18 stops the flocculated materials (the flow C '). j) The pumping 25 pushes this water still loaded with chemical materials in a tank 33 (the flow C) in which the pressure can be lowered so as to evaporate the water at low temperature and separate by gravity the chemical materials (flow D '). k) The evaporated water is collected in a buffer tank 21 (the flow D).   1) The chemical materials are taken at each point of filtration to be evacuated and stripped (in the filtrel8 and in the tank of the low pressure apparatus 33 (the flow D ') after the evaporation of the water.   m) Cleaning of appliances and filters is done regularly.   n) The clean water (stream E) contained in the buried buffer tank 21 is returned to the tank 35 for a new wash.   2864952 8 2) Device for treating agricultural or industrial effluents containing chemical substances (fungicides, insecticides, or phytosanitary) in a closed circuit characterized in that it comprises a) A tank 35 for washing the packages used to mix the remains of the materials 5 with the water of this tank (flow A).   b) A pump 25 between the tank 35, a filter 18 and an electrolytic tank 12.   c) A filter 18 stops by filtration a part of the chemical materials (the flow B ').   d) A pump 25 sends the remaining effluent mixed with water (stream B) into the electrolytic tank 12 to be degraded by flocculation 12.   e) An electrical cabinet 28 rectifies the electric current (alternating) of the EDF network in direct current to regulate it to a constant amperage and to distribute it to the electrodes 06.   f) An electrical cabinet 28 is designed to maintain a constant amperage throughout the duration of the electrolysis i2.   g) An electrolytic cell 12 provided with at least one pair of electrodes 06 h) The pump 25 between the electrolytic cell 12 the filter 18 and the apparatus 33 under low pressure.   i) A filter 18 stops the flocculated materials (the flow C ').   j) The pump 25 pushes the water still loaded with chemical materials into a reservoir 33 (stream C).   k) A device 33 in which the pressure can be kissed so as to evaporate the water at low temperature and to separate by gravity the chemical materials (flow D ').   201) A buffer tank 2lentered and at atmospheric pressure in which the evaporated water is collected (the flow D), then the water being cooled, resumes its liquid state (flow E). m) The pump 25 sends the clean water of the buffer tank 21 through the valve 38 to the container 35.   3) Device according to claim 2 characterized in that the vacuum is made in the apparatus 33 25 by suction of the air, to lower the pressure, once this device contains a certain volume of water loaded of chemicals.   4) Device according to claim 2 characterized in that an electrical cabinet 29 through the relay of a level probe 01 cuts the supply of the pump 25 when the volume of the effluents in the electrolytic tank 12 exceeds the level wish.   2864952 _9_ 5) Device according to claim 2 characterized in that the electrolytic tank 12, the filter 18, the easels 05 are made of composite materials or fiberglass, and the easels 05 carry the electrodes horizontally as low as possible at the bottom of the electrolytic tank 12 10 15 20 25