Treatment device for cross-linking agent TAIC (triallyl isocyanurate) production wastewater

Abstract

The utility model discloses a cross-linking agent TAIC (triallyl isocyanurate) production wastewater treatment device, which relates to the technical field of industrial wastewater treatment and comprises a high-temperature alkaline hydrolysis unit, an evaporation unit, an SBR (sequencing batch reactor) biochemical unit, an A / O (anaerobic / oxic) biochemical unit and a deep oxidation unit. The utility model also discloses a method for treating the cross-linking agent TAIC production wastewater by using the device, the production wastewater enters the high-temperature alkaline hydrolysis unit after the pH value of the production wastewater is adjusted, a reaction is carried out under a strong alkaline condition, the high-temperature alkaline hydrolysis effluent is adjusted to be weak acid and then is introduced into the evaporator, and the evaporation condensate is treated by adopting an SBR-A / O biochemical treatment process, so that the production wastewater is obtained. The biochemical effluent is deeply oxidized, so that the discharged water meets the nano-tube discharge standard.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a treatment device for wastewater produced by crosslinking agent TAIC. Background Art

[0002] Crosslinker TAIC is a commonly used organic crosslinker with the chemical name triallyl isocyanurate. TAIC is widely used as a crosslinker, modifier and vulcanizer for a variety of plastics, resins and special rubbers. Its application areas also extend to 5G electronic circuit boards and the solar energy industry.

[0003] At present, the main production process of the cross-linking agent TAIC product is to use cyanate and allyl chloride as raw materials and DMF as solvent. Sodium cyanate and allyl chloride undergo a two-step chemical reaction of substitution and cyclization to produce TAIC. After the reaction, the material is subjected to reduced pressure distillation to recover DMF, and then water is added to dissolve the by-product sodium chloride. The product is allowed to stand and stratify, and the sodium chloride aqueous phase is separated to obtain a crude organic phase product of TAIC. The crude product is washed with acid, alkali and water to remove water-soluble impurities, and a TAIC product with a content of more than 95% and an appearance of light reddish brown transparent liquid is obtained.

[0004] At present, the treatment methods for refractory organic wastewater at home and abroad include: biological enhancement, advanced oxidation, physicochemical treatment, etc., but the relevant information on the research of TAIC production wastewater treatment process is relatively rare in mainstream journals. Because the molecular structure of TAIC has a high degree of symmetry, its physical and chemical properties are relatively stable, and it is difficult to degrade it by common biochemical methods. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model discloses a treatment device for wastewater produced by a cross-linking agent TAIC. The device of the utility model adopts a high-temperature alkaline hydrolysis process for pretreatment to convert cyclic compounds in the wastewater into small molecules, and then removes most of the organic nitrogen through evaporation. The evaporated water passes through an SBR-A / O process to greatly reduce the concentration of various pollutants in the wastewater, and then undergoes deep oxidation to enable the drainage to meet the discharge standards and avoid pollution to environmental water bodies.

[0006] The utility model is achieved in this way:

[0007] A treatment device for wastewater produced by the cross-linking agent TAIC, characterized in that the treatment device comprises a high-temperature alkaline hydrolysis unit, an evaporation unit, an SBR unit, an A / O unit, and a deep oxidation unit; according to the direction of wastewater treatment, a high-temperature alkaline hydrolysis unit inlet and a high-temperature alkaline hydrolysis unit outlet are respectively arranged before and after the high-temperature alkaline hydrolysis unit; an evaporation unit inlet and an evaporation unit outlet are respectively arranged before and after the evaporation unit; an SBR unit inlet and an SBR unit outlet are respectively arranged before and after the SBR unit; an A / O unit inlet and an A / O unit outlet are respectively arranged before and after the A / O unit; a deep oxidation unit inlet and a deep oxidation unit outlet are respectively arranged before and after the deep oxidation unit;

[0008] The connection relationship of the treatment device is as follows: the high temperature alkaline hydrolysis unit outlet is connected to the evaporation unit inlet, the evaporation unit outlet is connected to the SBR unit inlet, the SBR unit outlet is connected to the A / O unit inlet; the A / O unit outlet is connected to the deep oxidation unit inlet;

[0009] Furthermore, the high temperature alkaline hydrolysis unit comprises a front regulating unit, a heating unit, a rear regulating unit, and a heat exchange unit, and the connection sequence is the front regulating unit, the heating unit, the heat exchange unit, and the rear regulating unit. Each unit is connected by a pipeline and a pump.

[0010] Furthermore, the front adjustment unit includes a medicine preparation unit and a medicine adding device, and the rear adjustment unit includes a medicine preparation unit and a medicine adding device, and the medicine preparation unit and the medicine adding device are connected by a pipeline and a pump.

[0011] Furthermore, the high temperature alkaline hydrolysis unit uses sodium hydroxide as a hydrolyzing agent, and the hydrolyzing agent is added to the pre-conditioning unit through a dosing device to decompose the pollutants in the absence of a catalyst.

[0012] The device of the utility model can realize the treatment of the cross-linking agent TAIC production wastewater. The utility model also discloses a method for using the device for treating the cross-linking agent TAIC production wastewater, which is characterized in that the method of use is as follows:

[0013] (1) Add liquid caustic soda or caustic soda flakes to adjust the pH of the wastewater to 14, and then pass the wastewater into a high-temperature alkaline hydrolysis reaction device for 1 to 2 hours;

[0014] (2) After the high temperature alkaline hydrolysis reaction is completed, the pH of the high temperature alkaline hydrolysis water is adjusted to 5-6 and enters the evaporator;

[0015] (3) The evaporated condensate is passed into an SBR reaction device, the temperature is controlled at 25-35°C, and the residence time is 24-72 hours. The SBR reaction device is a sequencing batch reaction device inoculated with salt-tolerant bacteria, and the salt-tolerant bacteria are immobilized on biological activated carbon with a mesh size of 100-200.

[0016] (5) The SBR effluent is passed into the A / O reaction device, the temperature is controlled at 25-35°C, and the residence time is 24-48 hours. The A / O reaction device is a reaction device inoculated with salt-tolerant bacteria. The salt-tolerant bacteria are immobilized on 100-200 mesh biological activated carbon;

[0017] (6) After deep oxidation, the biochemical effluent is discharged into pipes.

[0018] The beneficial effects of the utility model and the prior art are:

[0019] The device uses high-temperature alkaline hydrolysis technology to perform high-temperature alkaline hydrolysis on macromolecular cyclic compounds in wastewater, degrading them into small molecular pollutants, thereby enhancing adaptability to water quality changes and reducing sludge production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a treatment device for wastewater produced by the cross-linking agent TAIC disclosed in an embodiment of the utility model;

[0021] Among them, 1-high temperature alkaline hydrolysis unit, 2-evaporation unit, 3-SBR unit, 4-A / O unit, 5-deep oxidation unit, 6-high temperature alkaline hydrolysis inlet, 7-high temperature alkaline hydrolysis unit outlet, 8-evaporation unit inlet, 9-evaporation unit outlet, 10-SBR unit inlet, 11-SBR unit outlet, 12-A / O unit inlet, 13-A / O unit outlet, 14-deep oxidation unit inlet, 15-deep oxidation unit outlet. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the utility model through a specific implementation method based on a wastewater treatment device actually produced by a certain enterprise, and verifies the feasibility and accuracy of the method of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment 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.

[0023] The details are as follows:

[0024] like Figure 1As shown, the treatment device described in the device of the utility model includes a high-temperature alkaline hydrolysis unit 1, an evaporation unit 2, an SBR unit 3, an A / O unit 4, and a deep oxidation unit 5; according to the direction of wastewater treatment, a high-temperature alkaline hydrolysis unit inlet 6 and a high-temperature alkaline hydrolysis unit outlet 7 are respectively arranged at the front and rear of the high-temperature alkaline hydrolysis unit 1; an evaporation unit inlet 8 and an evaporation unit outlet 9 are respectively arranged at the front and rear of the evaporation unit 2; an SBR unit inlet 10 and an SBR unit outlet 11 are respectively arranged at the front and rear of the SBR unit 3; an A / O unit inlet 12 and an A / O unit outlet 13 are respectively arranged at the front and rear of the A / O unit 4; a deep oxidation unit inlet 14 and a deep oxidation unit outlet 15 are respectively arranged at the front and rear of the deep oxidation unit 5.

[0025] The high temperature alkaline hydrolysis unit outlet 7 is connected to the evaporation unit inlet 8, the evaporation unit outlet 9 is connected to the SBR unit inlet 10, the SBR unit outlet 11 is connected to the A / O unit inlet 12; the A / O unit outlet 13 is connected to the deep oxidation unit inlet 14.

[0026] The production wastewater is passed into the high-temperature alkaline hydrolysis unit, and caustic soda flakes or liquid caustic soda is added to react under strong alkaline conditions. The pH of the effluent from the high-temperature alkaline hydrolysis is adjusted to weak acidity and enters the evaporation unit. The evaporated condensate is treated biochemically using SBR-A / O, and the biochemical effluent is deeply oxidized to ensure that the wastewater meets the piped emission standards.

[0027] The usage and processing flow of the device of the utility model are as follows:

[0028] A type of TAIC production wastewater is alkaline, with COD of 42000mg / L, TOC of 15000mg / L, ammonia nitrogen of 100mg / L, total nitrogen of 5700mg / L, and TDS of 22000mg / L.

[0029] Liquid alkali is added to the wastewater to adjust the pH to 14 and enter the high-temperature alkaline hydrolysis device, and the reaction time is 1-2 hours; after the high-temperature alkaline hydrolysis reaction is completed, sulfuric acid is added to adjust the pH to 5-6, and it is passed into the MVR evaporator. The evaporated condensate enters the SBR device. The device is a sequencing batch reactor. The water temperature is controlled at 27°C. 100-200 mesh biological activated carbon with salt-tolerant bacteria immobilized is added as filler. The residence time is 48 hours. The SBR effluent continues to pass into the A / O device, and the water temperature is controlled at 27°C. 100-200 mesh biological activated carbon with salt-tolerant bacteria immobilized is added as filler. The residence time is 48 hours. The effluent COD reaches the nanotube emission standard after deep oxidation.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A treatment device for wastewater produced by the production of cross-linking agent TAIC, characterized in that: According to the direction of wastewater treatment, the treatment device includes a high-temperature alkaline hydrolysis unit (1), an evaporation unit (2), an SBR unit (3), an A / O unit (4), and a deep oxidation unit (5); The high-temperature alkaline hydrolysis unit (1) is provided with a high-temperature alkaline hydrolysis unit inlet (6) and a high-temperature alkaline hydrolysis unit outlet (7) at the front and rear, respectively; the evaporation unit (2) is provided with an evaporation unit inlet (8) and an evaporation unit outlet (9) at the front and rear, respectively; the SBR unit (3) is provided with an SBR unit inlet (10) and an SBR unit outlet (11) at the front and rear, respectively; the A / O unit (4) is provided with an A / O unit inlet (12) and an A / O unit outlet (13) at the front and rear, respectively; the deep oxidation unit (5) is provided with a deep oxidation unit inlet (14) and a deep oxidation unit outlet (15) at the front and rear, respectively; The high temperature alkaline hydrolysis unit outlet (7) is connected to the evaporation unit inlet (8), the evaporation unit outlet (9) is connected to the SBR unit inlet (10), the SBR unit outlet (11) is connected to the A / O unit inlet (12); the A / O unit outlet (13) is connected to the deep oxidation unit inlet (14); The production wastewater is passed into a high-temperature alkaline hydrolysis unit (1), and caustic soda flakes or liquid caustic soda is added to react under strong alkaline conditions. The pH of the effluent from the high-temperature alkaline hydrolysis is adjusted to a weak acidity and then enters an evaporation unit (2). The evaporation condensate is subjected to SBR-A / O biochemical treatment, and the biochemical effluent is further subjected to deep oxidation, so that the wastewater meets the piped discharge standard.

2. The device for treating wastewater from the production of cross-linking agent TAIC according to claim 1, characterized in that: The high temperature alkaline hydrolysis unit (1) comprises a front regulating unit, a heating unit, a rear regulating unit and a heat exchange unit in sequence; the front regulating unit, the heating unit, the heat exchange unit and the rear regulating unit are connected by pipelines and pumps.

3. The treatment device for cross-linking agent TAIC production wastewater according to claim 2, characterized in that: The front regulating unit includes a medicine preparation unit and a medicine adding device thereof, and the rear regulating unit also includes a medicine preparation unit and a medicine adding device thereof. The medicine preparation unit and the medicine adding device are connected via a pipeline and a pump.

4. The treatment device for cross-linking agent TAIC production wastewater according to claim 2, characterized in that: The high temperature alkaline hydrolysis unit (1) uses sodium hydroxide as a hydrolyzing agent, and the hydrolyzing agent is added to the pre-conditioning unit through a dosing device to decompose the pollutants in the absence of a catalyst.

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