High-salt-content organic wastewater treatment system

Abstract

The utility model provides a high-salt-content organic wastewater treatment system. The system comprises a biochemical treatment system, an electrolytic oxidation system, a sludge contact reactor, a sludge concentration tank and a sludge filter press which are connected in sequence, water produced by the biochemical treatment system enters an electrolytic oxidation system, water produced by the electrolytic oxidation system enters a sludge contact reactor, sludge produced by the sludge contact reactor is fed into a sludge concentration tank, and water produced by the sludge contact reactor is directly used for hot disintegration of steel slag; or directly feeding into a membrane filtration system and / or an adsorption resin system and / or an ion exchange resin system for subsequent treatment. According to the utility model, the residual oxidability of water produced by electrolytic oxidation is reduced with lower cost, and meanwhile, the removal of water in cells by sludge is promoted, so that the sludge dewatering efficiency is improved; the residual chlorine content of the water produced by the system does not exceed the standard, and can be directly used for steel slag hot disintegration or a subsequent membrane treatment process, so that the service life of membrane treatment equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a system for treating high-salt organic wastewater. Background Art

[0002] Electrolytic oxidation is an advanced oxidation technology for degrading organic matter and ammonia nitrogen in water. It has a high organic matter degradation efficiency and a relatively wide range of organic matter degradation capabilities. In the actual engineering application of electrolytic treatment of high-salt organic wastewater, while electrolytically oxidizing organic matter, the product usually shows excessive oxidation, which is manifested as high redox potential, high residual chlorine content, etc., which is not conducive to the treatment of subsequent equipment. At present, the commonly used technical means is to add excessive reducing agent after electrolysis to ensure the safety of subsequent sewage treatment equipment such as membrane filtration, adsorption resin, ion exchange resin, etc. However, the cost of adding a large amount of reducing agent is high, and more ions are introduced into the sewage, which increases the burden of subsequent sewage concentration. Therefore, there is an urgent need to find a lower-cost and more reasonable treatment system. Utility Model Content

[0003] Based on the technical problems existing in the above-mentioned prior art, the utility model provides a high-salinity organic wastewater treatment system, which achieves the purpose of in-situ treatment and direct reuse of high-salinity organic wastewater.

[0004] The above objectives are achieved through the following solutions:

[0005] A high-salt organic wastewater treatment system, characterized in that the system comprises a biochemical treatment system, an electrolytic oxidation system, a sludge contact reactor, a sludge thickening tank and a sludge filter press connected in sequence; the water produced by the biochemical treatment system enters the electrolytic oxidation system, the water produced by the electrolytic oxidation system enters the sludge contact reactor, the sludge produced by the sludge contact reactor is sent to the sludge thickening tank, the water produced by the sludge contact reactor is directly used for steel slag heating, or is sent to a membrane filtration system and / or an adsorption resin system and / or an ion exchange resin system for subsequent treatment.

[0006] The system as described above is characterized in that the sludge contact reactor includes a reactor body, the upper part of which is cylindrical and the lower part is truncated cone-shaped; a sludge inlet is provided on the upper side wall of the reactor body, and an electrolyzed water inlet is provided on the lower side wall; a sludge outlet is provided at the bottom of the reactor body, and a produced water outlet is provided at the top; a screw agitator is provided inside the reactor body, and the propulsion direction is downward.

[0007] The system as described above is characterized in that the sludge enters the reactor body tangentially along the cylinder wall from the sludge inlet.

[0008] The system as described above is characterized in that the water produced by the electrolytic oxidation system enters the reactor body tangentially along the cylinder wall from the electrolytic water inlet, and the direction in which the sludge enters the reactor body is the same as the direction in which the water produced by the electrolytic oxidation system enters the reactor body.

[0009] The system as described above is characterized in that the direction of rotation of the sludge and the water produced by the electrolytic oxidation system in the reactor body is the same as the direction of rotation of the screw agitator.

[0010] The system as described above is characterized in that a part of the produced water of the sludge contact reactor is mixed with the produced water of the electrolytic oxidation system and then re-enters the sludge contact reactor.

[0011] The system as described above is characterized in that the sludge used in the sludge contact reactor is the sludge produced by the biochemical treatment system.

[0012] The system as mentioned above is characterized in that a truncated cone-shaped water outlet guide tube is provided at the center of the upper part of the sludge contact reactor, and the upper end side of the water outlet guide tube is connected to a horizontal water outlet pipe.

[0013] The system as described above is characterized in that an exhaust pipe is provided on the top of the sludge contact reactor.

[0014] Beneficial effects of the utility model:

[0015] The high-salt organic wastewater treatment system of the utility model reduces the residual oxidizing property of electrolytic oxidation water at a relatively low cost, while promoting the removal of sludge from the internal water of cells, thereby improving the sludge dehydration efficiency; the residual chlorine content of the system produced water does not exceed the standard, and can be directly used for steel slag heating or for subsequent membrane treatment processes, thereby increasing the service life of the membrane treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the process of using the water produced by the utility model system directly for steel slag slagging.

[0017] Figure 2 This is a schematic diagram of the process of using the produced water of the utility model system directly for membrane treatment equipment.

[0018] Figure 3 It is a schematic diagram of the structure of the sludge contact reactor of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and should not be understood as a limitation on the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following is combined with Figure 1-3 , describe in detail the technical solution provided by the utility model.

[0023] like Figure 1-2 As shown, the high-salt organic wastewater treatment system of the utility model comprises a biochemical treatment system, an electrolytic oxidation system, a sludge contact reactor, a sludge thickening tank and a sludge filter press connected in sequence. The water produced by the biochemical treatment system enters the electrolytic oxidation system, the water produced by the electrolytic oxidation system enters the sludge contact reactor, the sludge produced by the sludge contact reactor is sent to the sludge thickening tank, the water produced by the sludge contact reactor is directly used for steel slag heating, or sent to a membrane filtration system and / or an adsorption resin system and / or an ion exchange resin system for subsequent treatment.

[0024] like Figure 3 As shown, the sludge contact reactor includes a reactor body 3, the upper part of which is cylindrical and the lower part is truncated cone-shaped. A sludge inlet 2 is provided on the upper side wall of the reactor body 3, and an electrolyzed water inlet 1 is provided on the lower side wall. A sludge outlet 8 is provided at the bottom of the reactor body 3, and a produced water outlet 7 is provided at the top. A screw agitator 4 is provided inside the reactor body 3, and the propulsion direction is downward.

[0025] The sludge enters the reactor body 3 tangentially along the cylinder wall from the sludge inlet 2, and the water produced by the electrolytic oxidation system enters the reactor body 3 tangentially along the cylinder wall from the electrolytic water inlet 1. The direction in which the sludge enters the reactor body 3 is the same as the direction in which the water produced by the electrolytic oxidation system enters the reactor body 3. The direction in which the sludge and the water produced by the electrolytic oxidation system rotate in the reactor body is the same as the direction in which the screw agitator 4 rotates.

[0026] A water outlet guide tube 5 is provided at the center of the upper part of the reactor, which is a truncated cone-shaped tube, and a horizontal water outlet pipe is connected to the side of the upper end of the guide tube. An exhaust pipe 6 is provided at the top of the reactor.

[0027] The tangential direction of the cone at the bottom of the reactor is the sludge outlet. The sludge discharge direction is the same as the rotation direction of the screw agitator. There are two sludge outlets. After the sludge is discharged, it enters the subsequent sludge thickening tank and sludge filter press. After the sewage enters the reactor cylinder tangentially, it swirls under the action of the high flow rate of its own jet and the screw agitator, and slowly swirls upward. After the sludge enters the reactor cylinder tangentially, it swirls and diffuses under the high flow rate of its own jet and the screw agitator, and slowly swirls downward under the action of gravity and the screw agitator. In the reactor, a large velocity gradient is formed between water with different swirl radii and between water and sludge particles, which accelerates the reaction rate of residual chlorine and oxidizable components in sludge particles. The cells in the sludge particles are oxidized and degraded and damaged by high concentrations of residual chlorine, the cell membrane disintegrates, and the water inside the cells is released, which improves the subsequent sludge dehydration effect.

[0028] A portion of the water produced by the sludge contact reactor is mixed with the water produced by the electrolytic oxidation system and then re-enters the sludge contact reactor through the circulation pump 9.

[0029] In addition, the sludge used in the sludge contact reactor is the sludge produced by the biochemical treatment system.

[0030] The above implementation is not limited to the above embodiment, and other combinations of related devices are also protected by the present utility model. The above implementation is only used to illustrate the present utility model, but not to limit the present utility model. Technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions should also belong to the scope of the present utility model.

Claims

1. A high-salinity organic wastewater treatment system, characterized in that: The system includes a biochemical treatment system, an electrolytic oxidation system, a sludge contact reactor, a sludge thickening tank and a sludge filter press connected in sequence; The water produced by the biochemical treatment system enters the electrolytic oxidation system, the water produced by the electrolytic oxidation system enters the sludge contact reactor, the sludge produced by the sludge contact reactor is sent to the sludge thickening tank, the water produced by the sludge contact reactor is directly used for steel slag heating, or sent to the membrane filtration system and / or adsorption resin system and / or ion exchange resin system for subsequent treatment.

2. The system according to claim 1, characterized in that The sludge contact reactor comprises a reactor body, the upper part of which is cylindrical and the lower part is truncated cone-shaped; a sludge inlet is arranged on the upper side wall of the reactor body and an electrolyzed water inlet is arranged on the lower side wall; a sludge outlet is arranged at the bottom of the reactor body and a produced water outlet is arranged at the top; a screw agitator is arranged inside the reactor body with the propulsion direction downward.

3. The system according to claim 2, characterized in that The sludge enters the reactor body tangentially along the cylinder wall from the sludge inlet.

4. The system according to claim 3, characterized in that The water produced by the electrolytic oxidation system enters the reactor body tangentially along the cylinder wall from the electrolytic water inlet, and the direction in which the sludge enters the reactor body is the same as the direction in which the water produced by the electrolytic oxidation system enters the reactor body.

5. The system according to claim 4, characterized in that The rotation direction of the sludge and the water produced by the electrolytic oxidation system in the reactor body is the same as the rotation direction of the screw agitator.

6. The system according to claim 1, characterized in that A portion of the produced water of the sludge contact reactor is mixed with the produced water of the electrolytic oxidation system and then re-enters the sludge contact reactor.

7. The system according to claim 1, characterized in that The sludge used in the sludge contact reactor is the sludge produced by the biochemical treatment system.

8. The system according to claim 2, characterized in that A truncated cone-shaped water outlet guide cylinder is arranged at the center of the upper part of the sludge contact reactor, and the upper end side surface of the water outlet guide cylinder is connected to a horizontal water outlet pipe.

9. The system according to claim 2, characterized in that An exhaust pipe is arranged on the top of the sludge contact reactor.

Images