RU2063377C1 - Plant for ozonization of liquid media - Google Patents

Abstract

FIELD: chemical treatment of liquid media, sewage treatment by ozonization and preparation of drinking water. SUBSTANCE: plant has oxygen-containing mixture source connected in series with ozone generator and dispersing device which is connected with reservoir containing liquid to be ozonized by means of circulating pipe line through pump. Reservoir is connected with ozone generator through filter, drier and chamber-receiver of varying volume. Plant may be provided with dispersing device of injector type which is fitted in suction section of circulating pipe line and pulser or cavitator fitted in delivery section of circulating pipe line. EFFECT: enhanced efficiency. 1 dwg

Description

 The invention relates to the chemical treatment of liquid media and can be used for wastewater treatment by ozonation, the preparation of drinking water and other mass transfer processes involving gases and liquids.

 A known installation for wastewater treatment with ozonation, containing a source of oxygen-containing mixture, an ozone generator, an ejector-mixer and a dispersant, which is connected through a circulation pipe to a tank for ozonized liquid [1] The tank for ozonated liquid is equipped with sewage inlet pipes, exhaust gas outlet pipes mixtures and purified water. The introduction of the ozone-air mixture is carried out by an ejector-mixer installed between the pump and the reservoir with liquid on the discharge part of the circulation pipeline.

 However, the low efficiency of ozone, the environmental hazard of the ozonation unit, due to the incomplete absorption of ozone, and the need to enrich the source air with oxygen, require the creation of special devices and additional energy costs for both the air enrichment process and the subsequent disposal of residual ozone.

 The proposed installation allows you to ensure the environmental safety of the ozonation process, to achieve the complete conversion of oxygen to ozone and reduce energy costs for its production.

 The proposed installation for ozonation of liquid media contains a source of oxygen-containing mixture, connected in series with an ozone generator and a dispersing device, which is connected through a pump through a circulation pipe to a tank for ozonated liquid, and the tank is connected through a filter, dryer and a volume-changing receiver chamber to a generator ozone. The installation can be equipped with an injection-type dispersing device on the suction part of the circulation pipe and a pulsator or cavitator on the discharge part of the circulation pipe.

 The difference of the proposed installation is the connection of the tank with ozonated liquid through a filter, a desiccant and a volume-changing receiver chamber with an ozone generator.

 An injection-type dispersant is preferably located on the suction portion of the circulation pipe.

 The preferred location of the pulsator or cavitator on the discharge part of the circulation pipe.

 The drawing shows a process diagram of the proposed installation for ozonation of water.

 The installation consists of an oxygen-containing mixture source 1, an ozone generator 2, an ejection type dispersant 3, a circulation pipe 4, a pump 5, a tank for ozonized liquid 6, a gas cycle pipeline 7, a filter 8, a desiccant 9, a receiver chamber 13. A tank for ozonized liquid equipped with a pipe for supplying liquid 10, a pipe for draining liquid 11, a pipe for removing sludge 12. The installation may include an injection type dispersant 14 on the suction part of the circulation pipe and a pulsator or cavitator 15 on the discharge part of the circulation pipe.

 Installation for ozonation of liquid media works as follows.

 The ozonated liquid through the pipe 10 is supplied to the reservoir 6 and the pump 5 is turned on, which circulates the liquid in the pipeline 4 and drives the dispersants 3 or 14. The dispersant draws in and disperses the ozone-containing mixture from the source 1 through the ozone generator 2, where synthesis of ozone from an oxygen-containing mixture. The mixture of liquid and bubbles of ozone-oxygen-containing gases enters the tank 6, where the gases are separated from the liquid, then through a pipe 7 through a filter 8, a desiccant 9 and a camera-receiver 13 to the ozone generator 2. Here again, ozone is generated from the mixture and the mixture is dispersed into the ozonated liquid.

 To increase the efficiency of the process of assimilation of ozone, a pulsator or cavitator 15 is turned on.

 Thus, the ozone-containing mixture circulates in the gas space of the installation, which is completely isolated from the atmosphere. The mixture is circulated until the ozone is completely consumed. The installation allows using pure oxygen as a source with almost 100% conversion to ozone. In addition, the problem of utilization of ozone as an environmentally hazardous product is removed.

 The efficiency of the proposed installation can be enhanced by using an injection type dispersant. In this case, the degree of assimilation of ozone per cycle increases, since the bubbles of ozone-containing gases formed in the dispersant additionally pass through a circulation pump that functions as an ideal mixing apparatus. The increase in the area and duration of contact promotes the absorption of ozone and, as a result, reduces the energy intensity of the ozonation process.

 The application of pulsating pressures on the fluid flow promotes more intensive mixing of gases in the bubbles and causes cavitation effects that contribute to the dissolution of ozone in the ozonated fluid and, as a result, its more complete assimilation.

To regulate the pressure in the gas space of the ozonation unit and ensure its operation in a cyclic mode without disturbing the isolation from the atmosphere, the desiccant 9 is connected to the ozone generator through a receiver chamber 13, which can vary the volume depending on the gas pressure in the unit. The operation of the installation in cyclic mode is as follows. After the completion of the ozonation cycle of the liquid, the camera-receiver 13 is filled with a gas mixture to a volume V> V _cut and the liquid is removed from the tank through the pipe 11. In this case, the volume of the camera-receiver is reduced to zero. Then the pipe 11 is closed and the tank is filled with liquid to the required volume. The gas mixture is displaced from the tank into the receiver chamber and the installation starts in the ozonation cycle. Further, the process is periodically repeated.

 The proposed installation is especially effective in technological processes for the production of high purity substances, as it allows reactions in closed cycles of liquid and gas, eliminating the ingress of impurities into the reactor space.

Claims (3)

 1. Installation for ozonation of liquid media, containing a source of oxygen-containing mixture, connected in series with an ozone generator and a dispersing device, which is connected through a pump through a circulation pipe to a tank for ozonized liquid, characterized in that the tank is connected through a filter, a dryer and a camera-receiver, which changes volume, with an ozone generator.  2. Installation according to claim 1, characterized in that the injection-type dispersing device is located on the suction part of the circulation pipe.  3. Installation according to paragraphs. 1 and 2, characterized in that it is equipped with a pulsator or cavitator mounted on the discharge part of the circulation pipe.