A device for treating carbon black production wastewater

Abstract

The utility model belongs to carbon black production technical field discloses a kind of carbon black production wastewater treatment device, including heat exchanger, regulating pool, coagulation air flotation machine, centrifugal separator, UASB anaerobic reactor, A / O-MBR water treatment device, ozone oxidation device and activated carbon filter device by pipeline, valve and pump are sequentially communicated;Grid is equipped before the liquid inlet of heat exchanger;Activated carbon filter device is communicated to drain pipe network.The utility model has good treatment effect, and part of heat energy, carbon black and raw material can be recycled, energy saving and emission reduction.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production technology, specifically to a carbon black production wastewater treatment device. Background Technology

[0002] The production of carbon black, whether using acetylene or tar / anthracene oil as raw materials, generates a certain amount of wastewater. This wastewater is complex in composition, containing various organic and inorganic pollutants, making it difficult to treat and posing a significant threat to the environment. If it is not treated and recycled, it will cause environmental pollution, hindering sustainable development, and also waste water resources, failing to promote conservation. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a carbon black production wastewater treatment device with good treatment effect, and can also recover and utilize part of the heat energy, carbon black and raw materials, thus saving energy and reducing emissions.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A wastewater treatment device for carbon black production includes a heat exchanger, an equalization tank, a coagulation flotation machine, a centrifuge, a UASB anaerobic reactor, an A / O-MBR water treatment device, an ozone oxidation device, and an activated carbon filter device, which are connected in sequence by pipes, valves, and pumps; a bar screen is provided in front of the liquid inlet of the heat exchanger; and the activated carbon filter device is connected to the drainage pipe network.

[0006] Preferably, the heat exchanger is connected to the heating device in the production line to fully utilize the heat.

[0007] Preferably, the grille is installed at a 75° angle with a 1mm gap. It is model GS-300 and made of stainless steel; it can isolate larger solid objects.

[0008] Preferably, the equalization tank is equipped with a sodium hydroxide supply tank and a dilute sulfuric acid supply tank above it, and the equalization tank is also equipped with an online pH monitoring device. This allows the pH value of the wastewater to be adjusted to 6.5 to 7.5.

[0009] Preferably, the coagulation flotation machine is connected to a polyaluminum chloride supply tank and a polyacrylamide supply tank. The model is QF-20. Its dissolved air pressure is 0.3-0.4 MPa, and its surface loading is 5 m³ / s. 3 / (m 2 •h). Used to remove colloids and suspended solids from water.

[0010] Preferably, the centrifuge is model LW450×2000N. It is used to recover carbon black and raw materials.

[0011] Preferably, the UASB anaerobic reactor is equipped with a three-phase separator, which consists of a water distributor and a double-layer separation device. The volumetric loading rate is 8 kg COD / (m³). 3 ·d), with an effective volume of 150m³. 3 .

[0012] Preferably, the A / O-MBR water treatment device is equipped with an anoxic tank, an aerobic tank, a PVDF hollow fiber membrane module, a Roots blower, and a microporous aerator.

[0013] Preferably, the ozone oxidation device is an ozone catalytic oxidation device, model OZ-5G.

[0014] Preferably, the activated carbon filter device is filled with coconut shell charcoal.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] This invention removes larger solids using a bar screen. A heat exchanger first removes heat from the high-temperature wastewater generated during the process, which is then reused in the heating equipment. The pH of the wastewater is then adjusted in a regulating tank. A coagulation and flotation machine removes colloids and suspended solids. A centrifuge separates some carbon black or related raw materials. The wastewater is further treated by a UASB anaerobic reactor, an A / O-MBR water treatment unit, and an ozone oxidation unit to remove inorganic and organic matter. Finally, impurities are adsorbed by an activated carbon filter before discharge. The entire system offers good treatment efficiency and can recover some heat energy, carbon black, and raw materials, achieving energy conservation and emission reduction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the equipment process according to an embodiment of the present utility model;

[0018] In the diagram, 1 is a heat exchanger; 2 is an equalization tank; 3 is a coagulation flotation machine; 4 is a centrifuge; 5 is a UASB anaerobic reactor; 6 is an A / O-MBR water treatment unit; 7 is an ozone oxidation unit; 8 is an activated carbon filter; 9 is a bar screen; 10 is a sodium hydroxide supply tank; 11 is a dilute sulfuric acid supply tank; 12 is a polyaluminum chloride supply tank; and 13 is a polyacrylamide supply tank. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1As shown, a wastewater treatment device for carbon black production includes a heat exchanger 1, an equalization tank 2, a coagulation flotation machine 3, a centrifuge 4, a UASB anaerobic reactor 5, an A / O-MBR water treatment device 6, an ozone oxidation device 7, and an activated carbon filter 8, which are connected in sequence through pipes (not shown), valves (not shown), and pumps (not shown); a screen 9 is provided before the liquid inlet of the heat exchanger 1; the activated carbon filter 8 is connected to the drainage pipe network (not shown).

[0021] Above the equalization tank 2 are a sodium hydroxide supply tank 10 and a dilute sulfuric acid supply tank 11; the coagulation flotation machine 3 is connected to a polyaluminum chloride supply tank 12 and a polyacrylamide supply tank 13.

[0022] In practical applications, wastewater collected and transported from the production process first passes through a screen 9 to remove larger solids, then enters a heat exchanger 1 to displace the heat from the high-temperature wastewater generated in the process, which is then reused in the heating devices required in the process. Next, the wastewater passes through an equalization tank 2 to adjust its pH to neutral by adding acid or alkali, and then enters a coagulation and flotation machine 3 to remove colloids and suspended solids. The treated wastewater is then separated from its solids (carbon black or related raw materials) by a centrifuge 4, which can be reused after further treatment. The wastewater is then further treated by a UASB anaerobic reactor 5 (COD effluent index ≤2000mg / L), an A / O-MBR water treatment device 6 (COD effluent index ≤150mg / L), and an ozone oxidation device 7 (COD effluent index ≤50mg / L) to remove inorganic and organic matter. Finally, the wastewater is discharged after impurities are adsorbed by an activated carbon filter 8. The sludge generated during the treatment process is first transported to a sludge thickening tank (not shown) for thickening, and then pressed into a filter cake by a plate and frame filter press (model XMY100 / 1000, not shown), and the filter cake is then subjected to appropriate post-treatment.

[0023] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A wastewater treatment device for carbon black production, characterized in that: It includes a heat exchanger, equalization tank, coagulation flotation machine, centrifuge, UASB anaerobic reactor, A / O-MBR water treatment device, ozone oxidation device and activated carbon filter device connected in sequence by pipes, valves and pumps; a bar screen is provided in front of the liquid inlet of the heat exchanger; the activated carbon filter device is connected to the drainage network.

2. The carbon black production wastewater treatment device as described in claim 1, characterized in that: The grille is installed at an angle of 75° and the grille gap is 1mm.

3. The carbon black production wastewater treatment device as described in claim 1, characterized in that: Above the regulating tank are a sodium hydroxide supply tank and a dilute sulfuric acid supply tank, and the regulating tank is also equipped with an online pH monitoring device.

4. The carbon black production wastewater treatment device as described in claim 1, characterized in that: The coagulation flotation machine is connected to a polyaluminum chloride supply tank and a polyacrylamide supply tank.

5. The carbon black production wastewater treatment device as described in claim 1, characterized in that: The UASB anaerobic reactor is equipped with a three-phase separator, which consists of a water distributor and a double-layer separation device.

6. The carbon black production wastewater treatment device as described in claim 1, characterized in that: The A / O-MBR water treatment device is equipped with an anoxic tank, an aerobic tank, a PVDF hollow fiber membrane module, a Roots blower, and a microporous aerator.

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