TEHCHNICAL RETROFIT OF 48SH-22 AND 24SH-19 TYPE CIRCULATING WATER PUMPS AT CHANGSHAN THERMAL POWER PLANT

doi:10.19666/j.rlfd.2001.01.016

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TEHCHNICAL RETROFIT OF 48SH-22 AND 24SH-19 TYPE CIRCULATING WATER PUMPS AT CHANGSHAN THERMAL POWER PLANT

更新时间：2025-09-28

- TEHCHNICAL RETROFIT OF 48SH-22 AND 24SH-19 TYPE CIRCULATING WATER PUMPS AT CHANGSHAN THERMAL POWER PLANT
- Thermal Power Generation Issue 1, Pages: 51-54(2001)
- 作者机构：
  
  1. 国家电力公司热工研究院,陕西,西安,710032
  2. 长山热电厂,吉林,松原,1311
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2001.01.016
  CLC： TM621
- Published：2001
- 稿件说明：
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TEHCHNICAL RETROFIT OF 48SH-22 AND 24SH-19 TYPE CIRCULATING WATER PUMPS AT CHANGSHAN THERMAL POWER PLANT[J]. Thermal power generation, 2001, (1): 51-54.
DOI：

TEHCHNICAL RETROFIT OF 48SH-22 AND 24SH-19 TYPE CIRCULATING WATER PUMPS AT CHANGSHAN THERMAL POWER PLANT[J]. Thermal power generation, 2001, (1): 51-54. DOI： 10.19666/j.rlfd.2001.01.016.

摘要

长山热电厂 1、2号泵房分别安装 6台 2 4sh - 19型和 4台 4 8sh - 2 2型循环水泵

运行情况表明这两种泵的设计扬程偏高

流量偏小

夏季 10台泵全部投入运行

循环水流量仍缺 10 0 0多t/h。此时各泵的运行工况点已偏离最佳工况点较远

运行效率低

耗电量大。采用壳体不动

只改叶轮和密封环的方案对两种泵进行技术改造后

2 4sh - 19G型和 4 8sh - 2 2G型泵的最高效率分别达到 87.2 6 %和88.4 8%。两种泵改造后由于流量增大、扬程降低、运行效率提高

耗电量大大降低。 10台泵全部改造后每年可实际节电 8.2 1× 10 6 kW·h。

Abstract

There are 10 circulating water pumps in Changshan Thermal Power Plant

among them

6 pumps of 24sh-19 type were installed in pump house No 1

the other 4 pumps of 48sh-22 type were installed in pump house No 2

The operational practice shows

the designed effective head of pumps of this two types was high

but the flow of them was low.When 10 circutating wter pumps were putting into operation all together in summer season

the shortage of circulating water flow has still been 1 000 t/h.In such case

the operational point of each pump was far away from the optimal point

making operation effciency to be low and energy consumption to be high.Keeping the pumps’casing in its original state

only the impellers and sealing rings had been retrofitted

enabling the maximum efficiency of 24sh-19G type and 48sh-22G type of pumps to reach 87.26% and 88.28% respectively.After retrofit

the water flow has been increased

effective head lowered

and operation efficiency heightened

resulting in enormous reduction of energy consumption.The total annual practical energy-saving of 10 pumps added up to 8.21×10 6 kW·h.

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