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System for efficiently removing suspended matters in wastewater produced during magnesium desulfurization

A technology for wastewater suspended solids and magnesium desulfurization, which is applied in separation methods, water/sewage treatment, chemical instruments and methods, etc., and can solve problems such as failure to meet discharge standards, easy scaling of impurities and clogging of evaporators and pipes.

Inactive Publication Date: 2016-03-30
JIANGSU YIHUAN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the desulfurization wastewater extracts the by-product magnesium sulfate 7 water, the impurities are easy to scale and block the evaporator and pipeline; even if the desulfurization wastewater is discharged, such high suspended matter cannot meet the discharge standard and must be treated

Method used

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  • System for efficiently removing suspended matters in wastewater produced during magnesium desulfurization

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Effect test

Embodiment 1

[0011] Embodiment 1: a system for efficiently removing suspended solids from magnesium desulfurization wastewater, comprising a cyclone clarifier 1, a plate and frame filter press 2 and a slurry clarifier 3, the cyclone clarifier 1 includes a housing 1.1 and a housing 1.1 The central cyclone cylinder 1.2 and the settler, the central cyclone cylinder 1.2 is tangentially connected to the magnesium removal method desulfurization wastewater inlet pipe 4, the top overflow port 1.3 of the shell 1.1 is connected to the slurry clarification tank 3 through the overflow pipe 5, and the cyclone clarification device 1 Shell 1.1 Bottom sewage outlet 1.4 is connected to the plate and frame filter press 2 through the sewage pipeline 6, and the liquid outlet 2.1 of the plate and frame filter press is connected to the slurry clarifier 3 through the liquid outlet pipeline 7. The sewage pipeline 6 is provided with Sludge lift pump 14.

Embodiment 2

[0012] Embodiment 2: with reference to embodiment 1, be provided with dosing system in addition, described dosing system comprises drug dissolving device 8, dosing metering pump 9 and pipeline mixer 10, and dissolving device 8 mixed solution outlet 8.1 passes through dosing pipeline 11 is connected to the pipeline mixer 10 arranged on the water inlet pipe 4, and the medicine adding metering pump 9 is arranged on the medicine adding pipeline 11.

Embodiment 3

[0013] Embodiment 3, referring to Embodiment 1 or 2, a packing layer 12 is arranged in the central swirl cylinder 1.2.

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Abstract

A system for efficiently removing suspended matters in wastewater produced during magnesium desulfurization is applicable to wastewater treatment or byproduct extraction engineering of a magnesium desulfurization process and comprises a cyclone clarification device, a filtration device and a slurry clarification tank, wherein the cyclone clarification device comprises a casing, a center cyclone barrel in the casing and a precipitator, the center cyclone barrel is tangentially connected with a magnesium desulfurization wastewater inlet pipe, an overflow port in the top end of the casing is connected with the slurry clarification tank through an overflow pipe, a sewage outlet in the bottom end of the casing of the cyclone clarification device is connected with the filtration device through a blowdown pipe, a liquid outlet of the filtration device is connected with the slurry clarification tank through a liquid outlet pipe, and a sludge lift pump is arranged on the blowdown pipe. The cyclone clarification device is used for preliminarily clarifying desulfurized slurry, and chemicals can be added to increase the removal rate of the suspended matters in the slurry. The suspended matters are precipitated at the bottom of the cyclone clarification device to form bottom mud, the bottom mud is lifted into a plate-and-frame filter press by the pump and dewatered, and the dewatered bottom mud is outwards transported for treatment.

Description

technical field [0001] The invention relates to a device for efficiently removing suspended matter in magnesium-based desulfurization wastewater, which is particularly suitable for wastewater treatment or by-product extraction projects in magnesium-based desulfurization processes, and is also suitable for removing suspended matter in industrial wastewater treatment projects. Background technique [0002] In flue gas magnesium desulfurization projects such as coal-fired boilers and steel mill shaft furnaces, the desulfurization slurry contains a large amount of suspended solids. The concentration of suspended solids is about 3000mg / L. The composition of suspended solids is relatively complex, except for a part of unreacted magnesium oxide. , also contains a large amount of sand (SiO 2 ). Magnesia is lightly fired magnesite, in high-quality magnesia, impurity sand (SiO 2 ) content is about 5-8%, and the content of general quality magnesia sand is about 10-20%. When the desu...

Claims

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Application Information

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IPC IPC(8): C02F9/04B01D36/04
CPCC02F9/00B01D36/045C02F1/385C02F1/52
Inventor 高攀祝磊杭品艳张宇闵俊杰陆叶
Owner JIANGSU YIHUAN GROUP
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