Segmental oxidation treatment system and treatment method of thermodynamic system of novel coal-fired power plant

A technology of oxidation treatment and thermal system, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc. problems such as bed operation cycle, to achieve the effect of improving safety and economy, easy and accurate measurement and control, and prolonging the operation cycle

Inactive Publication Date: 2014-06-25
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

In recent years, with the frequent occurrence of scale problems in the high temperature section (superheater, reheater) of the super (super) critical boiler heating surface, the impact of the traditional oxygen addition treatment on the high temperature oxidation of steam has aroused people's doubts and concerns. It also limits the popularization and application of oxygenation technology
In order to avoid the possible adverse effects of the oxygen in the steam on the high-temperature oxidation of the steam system, many units have changed to the low-oxygen treatment

Method used

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  • Segmental oxidation treatment system and treatment method of thermodynamic system of novel coal-fired power plant

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Embodiment Construction

[0014] The structure and working principle of the present invention will be further described below in conjunction with the accompanying drawings.

[0015] As shown in the attached figure, the oxygen used in the oxygen manifold 2 is industrial oxygen with a purity greater than 99.2%. The tank 1 and the aeration disc 6 distribute the oxygen from the oxygen manifold 2 into the closed pressure tank 1, and form a headspace pressure above the pressure tank 1, and the pressure can be adjusted in the range of 0.5-1.0 MPa. Then, the condensed water enters the pressure tank 1 from the top through the condensed water supply line 3 and is decompressed by the pressure reducing valve, and forms mist-like fine droplets through the high-pressure water mist nozzle 5, which fully contacts and mixes with the oxygen in the pressure space at the top. At this point, the metering pump 8 can be turned on to add medicine to the system. At the same time, the liquid level and pressure control system 7...

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Abstract

The invention discloses a segmental oxidation treatment system and a segmental oxidation treatment method of a thermodynamic system of a novel coal-fired power plant. The system comprises an oxygen-enriched water preparing system and an automatic reagent-adding control system. The treatment method comprises the following steps: preparing oxygen-enriched water by using the oxygen-enriched water preparing system; and carrying out segmental oxidation treatment on the thermodynamic system in an oriented reagent-adding manner by taking the oxygen-enriched water as an oxidizing agent, thereby promoting a water supply system and a high-pressure heater drainage system to be in an aerobic working condition and a steam system to be in an anaerobic working condition. According to the system and the method which are disclosed by the invention, the problem of flow accelerated corrosion of the water supply system and the high-pressure heater drainage system which are arranged at the front of a furnace is solved; and meanwhile, the surplus oxygen is prevented from entering the steam system to possibly perform adverse effects on a superheater and a reheater.

Description

technical field [0001] The invention relates to the field of water chemical working conditions in thermal power plants, in particular to a novel thermal power plant thermal system staged oxidation treatment system and treatment method. Background technique [0002] Oxygenation of boiler feed water is recognized as an advanced treatment process to inhibit flow-accelerated corrosion of the thermal system and reduce the fouling rate in the middle and low temperature sections of the boiler heating surface. The traditional oxygenation treatment process is to add oxygen to the condensate polishing outlet and the downcomer of the deaerator to control the higher dissolved oxygen in the feed water, so that the thermal system is oxidized step by step according to the water vapor flow, so that the entire thermal system is in an aerobic working condition. In recent years, with the frequent occurrence of scale problems in the high temperature section (superheater, reheater) of the super ...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/72
Inventor 黄万启张洪博孙本达曹松彦胡振华李瑛张恒星高文锋
Owner XIAN THERMAL POWER RES INST CO LTD
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