Renovation plan for water jet air extractor

1、 Overview:
The current # 3 unit of Henan Yuyuan Thermal Power Company is a condenser produced by Nanjing Steam Turbine Factory, and is randomly equipped with one steam injection and extraction device. The main technical parameters are shown in the table below:

model	extraction flow	steam consumption	Working gas pressure
C-20-1	20kg/h	400kg/h	1.2-1.4Mpa

After years of operation, these two sets of units have encountered a series of problems such as poor working conditions and unstable vacuum values due to aging equipment and technical support, which have affected the safe and economic operation of the units.
2、 Technical analysis:
The steam jet extractors matched with these two sets of units are extractors that have been gradually phased out by domestic steam turbine manufacturers in recent years. This type of air extractor has adverse effects on the operation of the unit due to its high power consumption and unstable operating conditions (steam pressure changes). In the past decade, many domestic manufacturers have gradually upgraded it to a multi-channel water jet pumping device. This type of vacuum pump has been widely promoted due to its advantages such as low water consumption, stable operation, and large pumping margin. Based on the actual situation of your company, it is recommended to upgrade the air pumps equipped with the two units to the patented product of Lianyungang Huaneng Power Auxiliary Equipment Co., Ltd. - TDA energy-saving water jet air pump. This device is a fifth generation water jet air extractor, which has an optimized water chamber diversion structure, throat area ratio, special-shaped throat group, and optimal water jet kinetic energy, making its performance at the leading technological level in China (currently supporting or retrofitting hundreds of units for more than 100 power plants nationwide).
3、 Technical and economic comparison:
According to the analysis of our company's technical department, it is recommended to upgrade the air extractors equipped with units # 3 and # 4 of Henan Yuyuan Thermal Power Company to TDA-N12 water jet air extractors (a typical configuration for N6MW units). The technical specifications are as follows

name	model	Extraction volume (dry) 0.004MPa	Extraction steam volume (wet) 0.008MPa	Water inlet pressure
Water jet pumping	TDA-N12	8.5kg/h	25kg/h	0.35MPa

name	model	Number of units	internet traffic	lift
water jet pump	IS100-65-200B	1 unit	90m3/h	39m

name	model	Number of units	rotational speed	power
electrical machinery	160L-2	1 unit	1450r/min	18.5KW

After the technological transformation, the amount of air and steam extracted by the air extractor has been increased, which will effectively ensure the safe and economic operation of the equipment. Some problems such as insufficient supporting capacity of the original steam injection air extractor will be alleviated In addition, due to the change of the power source of the vacuum pump from steam to water, the energy consumption of the equipment has been reduced, and the relevant parameters are as follows:
☆ Contact Lianyungang Huaneng Electric Auxiliary Machinery Co., Ltd. for parameters!
4、 Renovation cost and duration
Considering the working environment of the original air extractor, the installation of the new water jet air extractor can basically use the original bracket, with a small installation workload, easy operation, and a short renovation period (about one week after the equipment arrives on site). The renovation cost is approximately 6.276 yuan? 10000 yuan/unit (with supply list attached)
5、 Overview:
From the above calculations, it can be seen that Henan Yuyuan Thermal Power Company will transform steam extraction technology into water extraction, which is stable and reliable in technology, with considerable economic benefits. Excluding the factor of vacuum improvement, the equipment cost will be recovered in the short term after the transformation.

Lianyungang Huaneng Power Auxiliary Machinery Co., Ltd
Note: 1. The total cost includes equipment costs and renovation project costs.
2. The seller is responsible for on-site installation guidance, and the engineering costs are borne by the buyer.
3. The contract does not include engineering costs.