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Physical deoxidizing method and device for air cooling unit condensation water

An air-cooling unit and condensate technology, which is applied in separation methods, chemical instruments and methods, feed water heaters, etc., can solve problems affecting the health of operators, toxicity, etc., and achieve the effect of ensuring safe and stable operation and solving uncertain effects

Inactive Publication Date: 2018-12-11
新疆知信科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a large amount of chemical oxygen scavenger to the condensed water for a long time will cause uncertain effects on the unit; moreover, the existing chemical oxygen scavenger has certain toxicity, and long-term use will affect the health of the operator

Method used

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  • Physical deoxidizing method and device for air cooling unit condensation water
  • Physical deoxidizing method and device for air cooling unit condensation water
  • Physical deoxidizing method and device for air cooling unit condensation water

Examples

Experimental program
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Embodiment 1

[0034] This embodiment provides a method for physically removing oxygen from condensed water of an air-cooling unit, such as figure 2 As shown, the physical oxygen removal method includes the following steps S101 to S103.

[0035] S101. Make part of the exhaust steam output from the low-pressure cylinder of the steam turbine enter the hot well of the exhaust device.

[0036] In this step, part of the exhaust steam entering the hot well of the exhaust device accounts for 1 / 10-1 / 7 of the total exhaust steam output from the low-pressure cylinder of the steam turbine.

[0037] The step S101 specifically is to make part of the exhaust steam output from the low-pressure cylinder of the steam turbine enter the hot well of the exhaust device through the deoxygenated steam pipe connected to the bottom of the horizontal pipe section of the exhaust pipe of the exhaust device. For example, from the lower part of the well into the well.

[0038] The diameter of the deoxygenation steam p...

Embodiment 2

[0047] This embodiment provides a physical deaeration device for condensed water of an air-cooled unit, taking a 350MW unit as an example, as image 3 As shown, the physical oxygen removal device includes:

[0048] The deoxygenated steam pipeline 11 is used to make part of the exhaust steam output by the low-pressure cylinder 6 of the steam turbine enter the hot well 5 of the exhaust device 9;

[0049] The return water pipeline 12 is used to make the condensed water cooled by the air-cooled island 1 output by the condensed water pipeline 4 enter the top of the hot well 5 of the exhaust device 9;

[0050] The atomizing nozzle assembly 10 is used to atomize the condensed water output from the return water pipe 12. After the atomization, it will convect with the bottom-up exhaust steam in the hot well from top to bottom, so as to remove part of the dissolved oxygen in the condensed water.

[0051] In the present embodiment, the head end of the deoxygenation steam pipeline 11 is co...

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Abstract

The invention provides a physical deoxidizing method for air cooling unit condensation water. The physical deoxidizing method comprises the following steps that part of exhaust steam output by a turbine low pressure cylinder enters a hot well of a steam exhausting device; and condensation water cooled by an air cooling island enters the part above the hot well of the steam exhausting device, the condensation water is atomized to carry out convection with the exhaust steam from bottom to top in the hot well from top to bottom, and therefore part of dissolved oxygen in the condensate water is removed. Correspondingly, the invention provides a physical deoxidizing device for the air cooling unit condensation water. By means of the physical deoxidizing method and device for the air cooling unit condensation water, preliminary physical treatment can be carried out on the oxygen content in the condensation water.

Description

technical field [0001] The invention relates to the technical field of steam turbine production in power plants, in particular to a method for physically removing oxygen from condensed water in an air-cooling unit and a device for physically removing oxygen from condensed water in an air-cooling unit. Background technique [0002] In direct air-cooled coal-fired generating units, condensate dissolved oxygen is one of the main indicators of chemical supervision, especially large direct air-cooled units have higher requirements for the content of condensate dissolved oxygen. The dissolved oxygen exceeds the standard by a large margin or is unqualified for a long time, which will accelerate the corrosion of condensed water pipes and equipment, and cause iron oxide ions to be contained in the condensed water, causing galvanic corrosion and deteriorating heat transfer. The dissolved oxygen of the unit exceeds the standard, and the most direct cause is water supply Oxygen corrosio...

Claims

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Application Information

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IPC IPC(8): F22D1/50
CPCF22D1/50
Inventor 何武强郭俊杰万晓亮刘贤云
Owner 新疆知信科技有限公司
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