Novel water treatment method for boiler feedwater

A technology for boiler water supply and water treatment, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, general water supply conservation, etc. It can solve problems such as lack of systematic research and achieve the effect of preventing breeding.

Active Publication Date: 2012-02-08
XINJIANG DELAND
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

③Wu Jiquan and others studied the energy-saving water treatment process and its operation mode of industrial boilers and discussed the application of full-memb

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  • Novel water treatment method for boiler feedwater

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Embodiment

[0035] Operation according to the process: the steps of sterilization, filtration ultrafiltration, reverse osmosis, desalination, deoxygenation, and pH adjustment;

[0036] Dosing raw water fungicide: Dosing raw water fungicide before the raw water enters the raw water tank, using liquid chlorine, sodium hypochlorite or stable chlorine dioxide, and controlling the residual chlorine content in the water to 0.2-0.5mg / L;

[0037] Dosing coagulant: use coagulant before the multi-media filter, and the selected coagulant is polyaluminum chloride or polyaluminum ferric chloride or polyaluminum sulfate or polysilicon aluminum chloride. For surface water, use polyaluminum chloride to determine the dosage of the agent through the beaker coagulation test, and the general dosage is 10-20mg / L;

[0038] Dosing reducing agent: Dosing reducing agent sodium bisulfite before ultrafiltration, the amount is 2-5mg / L;

[0039] Dosing of reverse osmosis agent: use reverse osmosis membrane device fo...

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Abstract

A novel water treatment method for boiler feedwater of the invention comprises the following steps: sterilization, that is adding liquid chlorine, sodium hypochlorite or stabilized chlorine dioxide into a raw water tank, controlling the residual chlorine amount in water to be 0.2-0.5 mg/L; filtration, that is adding a polyaluminium chloride coagulant before a multimedium filter with an amount of 10-20 mg/L, controlling the water turbidity of the ultrafiltration feedwater to be not more than 0.1 NTU and the SDI to be not more than 3; adding a reducing agent of sodium bisulfite before ultrafiltration with an adding amount of 3-5 mg/L; reverse osmosis, that is performing desalination treatment by a reverse osmosis membrane device, continuously adding a PTP-0100 scale inhibitor before a security filter with an adding amount of 3-5 mg/L; continuously adding a Micro Treat BIO bactericide with an adding amount of 3-5 mg/L; additionally adding cleaning agents of Dimamite and High Flux once a month with an amount of 3-5% of the water amount to be produced; desalination, that is performing desalination by an electrical desalination system (EDI); deoxygenation, that is performing deoxygenation by a vacuum deoxygenator, adding 10-20 microgram/L of deoxidants, controlling the agent residual amount to be 5-20 microgram/L, adding a corrosion-inhibiting pH regulator to control the pH value to be 8.8-9.3.

Description

technical field [0001] The invention relates to the water treatment control technology of boiler feed water, especially the integration of the method, which is especially suitable for water treatment of high and medium boiler feed water systems. Background technique [0002] Boilers are steam or hot water generating equipment, and water is used as the heat transfer medium. Therefore, the quality of feed water is the core technology, and the use of qualified water quality is the prerequisite for ensuring the safe and stable operation of the boiler and the output of qualified steam or hot water. If the water quality of the feed water is poor, the hazards are as follows: 1. Scale formation: Scale causes damage to the metal on the heating surface of the boiler, reducing the service life of the boiler; reducing the flow section in the heating tube, increasing the flow resistance of the water circulation in the tube; reducing thermal efficiency, Increase coal consumption or reduc...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCY02A20/131
Inventor 马莉达曾凡付田孝敬
Owner XINJIANG DELAND
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