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Chemical processing method of coal chemical industry recycled circulating cooling water

A technology of circulating cooling water and chemical treatment, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as research concentration, achieve a high degree of automation, and reduce phosphorus Good content and anti-scaling effect

Active Publication Date: 2013-03-20
XINJIANG DEAN ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

② Zhang Huaibin and Liu Xiaoxi explored the recycling of coal chemical wastewater and the feasibility of recycling coal gasification wastewater into the circulating cooling water system. They believed that the comparison of physical and chemical treatment methods was in line with the actual situation of Harbin coal chemical industry; but the research focused on the depth of wastewater Research on treatment unit, chemical treatment method without reclaimed water as rehydration of circulating cooling water

Method used

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  • Chemical processing method of coal chemical industry recycled circulating cooling water
  • Chemical processing method of coal chemical industry recycled circulating cooling water
  • Chemical processing method of coal chemical industry recycled circulating cooling water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of composite scale and corrosion inhibitors, raw materials prepared in parts by weight: 9 parts of polyepoxysuccinic acid, 18 parts of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, bis-1,6 hexamethylene 19 parts of triaminepentamethylene phosphonic acid, 25 parts of scale inhibitor and dispersant, 1 part of benzotriazole, and 9 parts of deionized water; preparation: first add polyepoxysuccinic acid to 2-phosphonic acid butane- 1,2,4-tricarboxylic acid, put in a container and mix evenly, add bis-1,6 hexamethylene triamine pentamethylene phosphonic acid, scale inhibitor and dispersant, deionized water in turn, stir for 35 minutes, keep the temperature at 35°C, then add benzotriazole, continue to stir for 60 minutes, and keep the temperature at 35°C to obtain a composite scale and corrosion inhibitor;

[0023] The preparation of antiscaling and dispersing agent: 300 parts of deionized water and 490 parts of maleic anhydride are sucked into the reaction ket...

Embodiment 2

[0026] Medicament is prepared in parts by weight:

[0027] Preparation of composite scale and corrosion inhibitor: 11 parts of polyepoxysuccinic acid, 22 parts of 2-phosphonic acid butane-1,2,4-tricarboxylic acid, bis-1,6 hexamethylene triamine pentamethylene phosphine 21 parts of acid, 35 parts of scale inhibitor and dispersant, 3 parts of benzotriazole, and 28 parts of deionized water; Put it in a container, mix well, add bis-1,6 hexamethylene triamine pentamethylene phosphonic acid, scale inhibitor dispersant, deionized water in sequence, stir for 35 minutes, keep the temperature at 35 ° C, then add benzene Triazole, continue to stir for 60 minutes, and keep the temperature at 35°C to obtain a composite scale and corrosion inhibitor;

[0028] The preparation of antiscaling and dispersing agent: 290 kg of deionized water and 500 kg of maleic anhydride are sucked into the reaction kettle through the pump in turn, start stirring, and stir at room temperature until the maleic ...

Embodiment 3

[0031] Composite scale and corrosion inhibitor test results verification:

[0032] The object of water treatment is wastewater from a coal-to-methanol plant. The designed treatment formula and water quality control are shown in Table 1 and Table 2.

[0033] Table 1 Compound scale and corrosion inhibitor formula and code

[0034]

[0035] Water quality control indicators in Table 2

[0036]

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PUM

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Abstract

The invention provides a chemical processing method of coal chemical industry recycled circulating cooling water. An agentia is composed of composite scale and corrosion inhibitor which is composed of 9-11 parts of polyepoxysuccinic acid, 18-22 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid, 19-21 parts of methylene phosphonic acid, 25-35 parts of dirt dispersion agent, 1-3 parts of benzotriazole, and 9-18 parts of deionized water. First, adding polyepoxysuccinic acid into the 2-phosphonobutane-1,2,4-tricarboxylic acid, placing the polyepoxysuccinic acid and the 2-phosphonobutane-1,2,4-tricarboxylic acid in a container and evenly mixing, sequentially adding the methylene phosphonic acid, the dirt dispersion agent and the deionized water into the container, then stirring for 25-35 minutes, keeping the temperature at 20-35 DEG C, then adding the benzotriazole, continuously stirring for 30-60 minutes and keeping the temperature at 20-35 DEG C, and then, the composite scale and corrosion inhibitor is obtained. Dosage of the composite scale and corrosion inhibitor is 10mg / L, based on middle warmer strengthening water, total phosphorus of the circulating water is controlled to be 4-7mg / L, and a concentration ratio is controlled to be 5.0-6.0 times. The method further comprises sterilization and algae removing process and optimization of the circulating water.

Description

technical field [0001] The invention relates to a treatment technology for reusing reclaimed water for circulating cooling water, and is especially suitable for a chemical treatment method for reclaiming reclaimed water from coal chemical industry waste water for recirculating cooling water. Background technique [0002] Coal chemical industry consumes a lot of water, and the characteristics of its discharged sewage are: large volume of wastewater, complex water quality, high content of suspended solids, poor biochemical properties, and high toxicity. The wastewater is reused in the circulating cooling water system after advanced treatment. The biggest potential harm to the system is that the process of advanced treatment of coal chemical wastewater is relatively long, and it is often affected by uncontrollable factors, resulting in frequent fluctuations in water quality when reclaimed water is reused. When the content of harmful ions in middle water is high, with the contin...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F5/14C02F5/10
Inventor 马莉达徐志宗
Owner XINJIANG DEAN ENVIRONMENTAL PROTECTION ENG
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