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Method for recycling and treating semi-coke and coke production wastewater

A technology for the production of waste water and treatment methods, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve problems such as difficulty in meeting discharge requirements, substandard waste water treatment, and affecting production output. , to achieve the effect of increasing utilization value, low cost and improving utilization rate

Pending Publication Date: 2021-04-30
西安金沃泰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of wastewater produced in the production of semi-coke, not only the treatment is difficult and the treatment cost is high, but also the phenol content of the wastewater is 600-1000 mg / L after the deamination tower deamination and extraction tower dephenolization, COD Cr Between 3500 and 12000mg / L, it is difficult to meet the discharge requirements through micro-electrolysis, flocculation oxidation, biochemical and other methods. At present, many enterprises are limited by the fact that the wastewater treatment is not up to standard and the production output is affected.

Method used

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  • Method for recycling and treating semi-coke and coke production wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The coke production wastewater of a certain blue coke factory is black and red after being deaminated by the deammonization tower and extracted and dephenolized by the extraction tower.

[0022] 1. At room temperature, use sulfuric acid to adjust the pH of the semi-coke coke production wastewater that has been deaminated by the deamination tower and dephenolized by the extraction tower to 4-5, and pass through the 60mL Innovate-16 at a flow rate of 1BV / h. Resin column of macroporous adsorption resin (Φ20×300mm). After testing, the content of mixed phenols in the column liquid (absorbed water) is reduced to below 20ppm. Part of the column liquid is reused or discharged after further biochemical treatment up to the standard.

[0023] 2. Rinse the resin column adsorbed with mixed phenol in step 1 with 180mL tap water at a flow rate of 1BV / h to remove residual waste water and inorganic salts in the resin pores, and then drain the residual water in the resin column with com...

Embodiment 2

[0031] According to the method of Example 1, the blue charcoal coke production wastewater after deamination by deamination tower and extraction and dephenolation by extraction tower is recovered and treated, and the column liquid is taken once every 300mL until 3000mL is received, and the national standard method is used for treatment. The column liquid was tested for COD, and the test results are shown in Table 2.

[0032] Table 2 Adsorption effect of Innovate-16 adsorption resin on semi-coke coke production wastewater

[0033]

[0034] It can be seen from Table 2 that the application of Innovate-16 macroporous adsorption resin in the recycling of semi-coke coke production wastewater has obvious effects and can be widely promoted.

Embodiment 3

[0036] The coke production wastewater of a certain blue charcoal factory is black and red after being deaminated by the deamination tower and extracted and dephenolized by the extraction tower.

[0037] 1. At room temperature, mix 7×10 5 The blue coke coke production wastewater after deamination by the deamination tower and extraction and dephenolation by the extraction tower is adjusted to pH 4-5 with sulfuric acid, and is filled with 5×10 at a flow rate of 1BV / h. 3 L Innovate-16 resin column of macroporous adsorption resin (Φ1.2×4.8m). After testing, the content of mixed phenols in the column liquid (absorbed water) is reduced to below 20ppm. Part of the column liquid is reused or discharged after further biochemical treatment up to the standard.

[0038] 2. Use 1 × 10 4 L20~25℃ tap water for rinsing with a flow rate of 1BV / h to remove residual waste water and inorganic salts in the resin channels, and then drain the residual water in the resin column with compressed air....

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Abstract

The invention discloses a method for recovering and treating semi-coke and coke production wastewater, wherein the method comprises the steps: enabling the semi-coke and coke production wastewater subjected to deamination in a deamination tower and dephenolization in an extraction tower to pass through a fixed bed adsorption column filled with macroporous styrene adsorption resin, so that phenolic substances are adsorbed on the adsorption resin, the phenol content of effluent is less than 20 mg / L, and the CODCr is less than 2000 mg / L; the saturated resin is eluted with methanol, the eluted methanol-phenol mixed solution is rectified to recover the mixed phenol, and the methanol is recycled. According to the method for treating the semi-coke and coke production wastewater, 92% or above of mixed phenol is recycled, the wastewater subjected to adsorption treatment is subjected to micro-electrolysis, flocculation oxidation, biochemistry and the like and then completely meets the discharge or reuse requirements, and unification of wastewater treatment and resource utilization is achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical waste water treatment and utilization, and specifically relates to a method of using a macroporous adsorption resin to adsorb mixed phenols in blue coke coke production wastewater, so that the mixed phenols and inorganic salts in the wastewater are separated, and the column liquid is further passed through electrolysis. Conventional methods such as catalysis, flocculation, and biochemical treatment can reuse or discharge the part that reaches the standard. Background technique [0002] Semi-coke, also known as semi-coke and coke powder, is fired from the high-quality Jurassic clean coal abundant in Shenfu Coalfield. As a new type of carbon material, it has high fixed carbon, high specific resistance, and chemical activity. High carbon dioxide, low ash content, low aluminum, low sulfur, and low phosphorus have gradually replaced metallurgical coke and are widely used in the production of calcium c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F101/34
CPCC02F1/285C02F2101/345C02F2303/16
Inventor 郭东前邓宁张华孙洪桥
Owner 西安金沃泰环保科技有限公司
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