Reinforced pretreatment combined device for refractory high-toxicity organic wastewater in chemical industry park

Abstract

The utility model relates to the technical field of enhanced pretreatment devices for organic wastewater, in particular to an enhanced pretreatment combined device for refractory high-toxicity organic wastewater in a chemical industry park. Comprising a toxic organic wastewater oxidation reaction device, a toxic organic wastewater adsorption device, a toxic organic wastewater efficient precipitation device, an automatic ozone generator system, an automatic hydrogen peroxide dosing system and an automatic sodium hydroxide dosing system which are sequentially connected, the system comprises a toxic organic wastewater lifting system, an active agent adding system, an odor treatment system, a biochemical treatment system and a sludge treatment system. According to the method, at the front end of biochemical treatment, refractory or high-toxicity wastewater in a chemical industry park is pretreated, and the purposes of improving the biodegradability of the wastewater, reducing the toxicity of the wastewater under the combined action of physical and chemical adsorption and biological adsorption and ensuring the stability of a subsequent biochemical system are achieved through the enhanced pretreatment combined action of oxidation, adsorption, coagulating sedimentation and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of enhanced pretreatment devices for organic wastewater, in particular to an enhanced pretreatment combined device for difficult-to-degrade and highly toxic organic wastewater in a chemical park. Background Art

[0002] Refractory industrial wastewater discharged by production enterprises in chemical parks includes polycyclic aromatic hydrocarbons, organophosphorus pesticides, and thiocyanates. These substances share common characteristics: complex composition, high chemical oxygen demand, and high toxicity, typically with a B / C ratio less than 0.3. Their biodegradation process is slow and sensitive, and they are prone to interacting with other pollutants in the wastewater, inhibiting biochemical nitrification reactions, making the system unstable and even causing system failure. The CN220098801U treatment system for refractory industrial wastewater, however, is complex in design. These deficiencies have long remained unaddressed. Utility Model Content

[0003] In response to the problems raised by the background technology, the utility model designs a combined device for enhanced pretreatment of difficult-to-degrade highly toxic organic wastewater in chemical parks.

[0004] The utility model is realized through the following technical solutions:

[0005] A combined device for enhanced pretreatment of refractory and highly toxic organic wastewater in a chemical park, comprising a toxic organic wastewater oxidation reaction device, a toxic organic wastewater adsorption device, and a toxic organic wastewater high-efficiency precipitation device connected in sequence; the combined device also comprises an automatic ozone generator system, an automatic hydrogen peroxide dosing system, an automatic sodium hydroxide dosing system, a toxic organic wastewater lifting system, an active agent adding system, an odor treatment system, a biochemical treatment system, and a sludge treatment system; the odor treatment system is connected to the exhaust port of the toxic organic wastewater high-efficiency precipitation device; The odor treatment system is connected to the exhaust port of the toxic organic wastewater adsorption device; the toxic organic wastewater high-efficiency precipitation device is connected to the sludge treatment system through a pipeline; the water inlet of the biochemical treatment system is connected to the water outlet of the toxic organic wastewater high-efficiency precipitation device; the automatic ozone generator system and the automatic hydrogen peroxide dosing system are respectively connected to the toxic organic wastewater oxidation reaction device; the toxic organic wastewater lifting system is provided with an automatic sodium hydroxide dosing system; the water outlet of the toxic organic wastewater lifting system is connected to the water inlet of the toxic organic wastewater oxidation reaction device.

[0006] Furthermore, the toxic organic wastewater oxidation reaction device is provided with an ozone dispersion system, and the ozone dispersion system is connected to the automatic ozone generator system.

[0007] Furthermore, the discharge port of the active agent addition system is connected to the feed port of the toxic organic wastewater adsorption device.

[0008] Furthermore, the toxic organic wastewater adsorption device is provided with a mixing reaction device.

[0009] The advantages of the utility model are:

[0010] The utility model has a simple structure. The enhanced pretreatment combination device for difficult-to-degrade and highly toxic organic wastewater in chemical parks is at the biochemical front end to pretreat difficult-to-degrade or highly toxic wastewater in chemical parks. The enhanced pretreatment combination of oxidation, adsorption, coagulation and sedimentation is used to improve the biodegradability of the wastewater, and the toxicity of the wastewater is reduced through the combined effects of physical and chemical adsorption and biological adsorption, thereby ensuring the stability of the subsequent biochemical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0012] Figure 1 This is a schematic diagram of the structure of the utility model; among them, 1-automatic ozone generator system; 2-automatic hydrogen peroxide dosing system; 3-automatic sodium hydroxide dosing system; 4-toxic organic wastewater lifting system; 5-active agent adding system; 6-toxic organic wastewater oxidation reaction device, 601-ozone dispersion system; 7-toxic organic wastewater adsorption device, 701-mixing reaction device; 8-toxic organic wastewater high-efficiency precipitation device; 9-odor treatment system; 10-biochemical treatment system; 11-sludge treatment system. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] The present invention will be further described below with reference to the accompanying drawings. Example 1

[0015] like Figure 1 As shown, a combined device for enhanced pretreatment of difficult-to-degrade highly toxic organic wastewater in a chemical park comprises a toxic organic wastewater oxidation reaction device 6, a toxic organic wastewater adsorption device 7, and a toxic organic wastewater high-efficiency precipitation device 8 connected in sequence; the combined device also comprises an automatic ozone generator system 1, an automatic hydrogen peroxide dosing system 2, an automatic sodium hydroxide dosing system 3, a toxic organic wastewater lifting system 4, an active agent addition system 5, an odor treatment system 9, a biochemical treatment system 10, and a sludge treatment system 11;

[0016] Toxic organic wastewater oxidation reaction device 6

[0017] Mechanism: Under conditions where the pH is controlled between 8 and 9, ozone in water, under the action of a catalyst, generates free radicals. These free radicals then self-promote the generation of hydroxyl radicals (·OH) through elementary reactions. ·OH has a higher redox potential than other strong oxidants, reaching as high as 2.85V. When ·OH is used as the primary oxidant in its reaction with organic matter, the organic free radicals generated can continue to participate in the ·OH chain reaction. Consequently, it possesses extremely strong oxidizing power and exceptionally high oxidation efficiency. It can also control the cycloaddition oxidation reaction at a certain level for a long period of time, resulting in more thorough degradation of organic pollutants in water.

[0018] The mechanism of organic matter degradation lies in the oxidation, decomposition, and cleavage of long chains of organic matter in water through the highly oxidizing hydroxyl radical (·OH), breaking down large molecules into small molecules and improving their biodegradability. Finally, it can non-selectively oxidize organic matter into CO2, H2O, or mineral salts, thereby effectively reducing COD and color. It can effectively and thoroughly degrade organic matter that cannot be degraded by ordinary oxidants, improve biodegradability, and play a detoxifying role.

[0019] The odor treatment system 9 is connected to the exhaust port of the toxic organic wastewater high-efficiency precipitation device 8; the odor treatment system 9 is connected to the exhaust port of the toxic organic wastewater adsorption device 7;

[0020] (2) Toxic organic wastewater adsorption device 7:

[0021] Mechanism: Through physical, chemical and biological adsorption, it absorbs organic matter and some toxic substances that have an inhibitory effect on biochemistry in wastewater. The reactor is the core part of the adsorption device.

[0022] Advantages: waste treatment with waste, low operating costs.

[0023] The toxic organic wastewater efficient precipitation device 8 is connected to the sludge treatment system 11 through a pipeline; the water inlet of the biochemical treatment system 10 is connected to the water outlet of the toxic organic wastewater efficient precipitation device 8;

[0024] (3) Toxic organic wastewater adsorption device 8:

[0025] After adsorption, the wastewater undergoes solid-liquid separation in a high-efficiency sedimentation device. After enhanced pretreatment, the wastewater enters the park's biochemical treatment system, which operates stably due to reduced impact, and the resulting sludge is discharged into a sludge thickening tank.

[0026] Advantages: The design of the upflow and clockwise water flow direction ensures good hydraulic conditions, making the alum flowers in the non-mixing plug flow area not easy to break; the high mixing ratio makes the incoming water and the return sludge fully mixed, resulting in efficient flocculation reaction; the inclined plate separator is used to separate the alum flowers from the water, and the countercurrent flow separates the water from the sludge.

[0027] The automatic ozone generator system 1 and the automatic hydrogen peroxide dosing system 2 are each connected to the toxic organic wastewater oxidation reaction device 6. The toxic organic wastewater lifting system 4 is equipped with an automatic sodium hydroxide dosing system 3. The outlet of the toxic organic wastewater lifting system 4 is connected to the water inlet of the toxic organic wastewater oxidation reaction device 6. The toxic organic wastewater oxidation reaction device 6 is equipped with an ozone dispersion system 601, which is connected to the automatic ozone generator system 1. The outlet of the active agent addition system 5 is connected to the inlet of the toxic organic wastewater adsorption device 7. The toxic organic wastewater adsorption device 7 is equipped with a mixing reaction device 701.

[0028] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A combined device for enhanced pretreatment of difficult-to-degrade highly toxic organic wastewater in a chemical park, characterized in that: The combined device comprises a toxic organic wastewater oxidation reaction device (6), a toxic organic wastewater adsorption device (7), and a toxic organic wastewater high-efficiency precipitation device (8) which are connected in sequence; the combined device also comprises an automatic ozone generator system (1), an automatic hydrogen peroxide dosing system (2), an automatic sodium hydroxide dosing system (3), a toxic organic wastewater lifting system (4), an active agent adding system (5), an odor treatment system (9), a biochemical treatment system (10), and a sludge treatment system (11); the odor treatment system (9) is connected to the exhaust port of the toxic organic wastewater high-efficiency precipitation device (8); the odor treatment system (9) is connected to ... The toxic organic wastewater adsorption device (7) is connected to the exhaust port of the toxic organic wastewater high-efficiency precipitation device (8) through a pipeline; the water inlet of the biochemical treatment system (10) is connected to the water outlet of the toxic organic wastewater high-efficiency precipitation device (8); the automatic ozone generator system (1) and the automatic hydrogen peroxide dosing system (2) are respectively connected to the toxic organic wastewater oxidation reaction device (6); the toxic organic wastewater lifting system (4) is provided with an automatic sodium hydroxide dosing system (3); and the water outlet of the toxic organic wastewater lifting system (4) is connected to the water inlet of the toxic organic wastewater oxidation reaction device (6).

2. A chemical park refractory and highly toxic organic wastewater enhanced pretreatment combined device as claimed in claim 1, characterized in that: The toxic organic wastewater oxidation reaction device (6) is provided with an ozone dispersion system (601), and the ozone dispersion system (601) is connected to the automatic ozone generator system (1).

3. A chemical park refractory and highly toxic organic wastewater enhanced pretreatment combined device as claimed in claim 1, characterized in that: The discharge port of the active agent addition system (5) is connected to the feed port of the toxic organic wastewater adsorption device (7).

4. A chemical park refractory and highly toxic organic wastewater enhanced pretreatment combined device as claimed in claim 1, characterized in that: The toxic organic wastewater adsorption device (7) is provided with a mixing reaction device (701).

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