Water Jet Extractors for Evacuation Systems for Evacuation Pumps

Min.Order: 1
Product origin: Lianyungang, Jiangsu, China
Infringement complaint: complaintComplaint
US$ 44000

Description
Water jet extractors for evacuation systems for evacuation pumps
 
Product Description



Invention patent number: ZL 2014 1 0407667.3

1. Features:
 
 During the start-up of the unit, more steam will enter the condenser when the boiler ignites the steam turbine to warm up. If a certain vacuum is not established in the condenser, steam and water will enter the condenser to form a positive pressure, which will damage the equipment. The establishment of vacuum in the condenser is an essential condition for the turbine to rush. When the condenser and some low-pressure equipment (such as condensate pump, drain pump and some low-pressure heaters, etc.) are in normal operation, the interior is in a vacuum state.
   Because the pipes and shells are not tight, air will leak in, thus destroying the condenser vacuum and endangering the safe and economic operation of the steam turbine. At the same time, the partial pressure of air in the condenser increases, which leads to the increase of dissolved oxygen in condensate, thus aggravating the corrosion of thermal equipment and pipelines. The existence of air also increases the heat transfer resistance in the condenser, affects the cooling of the exhaust steam of the steam turbine by circulating cooling water, and increases the auxiliary power consumption. Therefore, when the condenser is running, the air must be continuously pumped out.
 
 In a word, the functions of the vacuum pumping system are:
(1)
establishing condenser vacuum at the initial stage of unit start-up;

(2) Keep the condenser vacuum during the normal operation of the unit to ensure the safe and economical operation of the unit. 

    The vacuum pumping equipment of condenser mainly includes air extractor and vacuum pump. The vacuum pumping system of water jet air extractor is widely used in domestic large and medium-sized units because of its simple system and reliable operatio


2. Structure and working principle of water jet air extractor:
   
In modern power plants, the jet air extractor is the most widely used one, which has the advantages of compact layout, simple structure, convenient maintenance, reliable operation and the ability to establish the required vacuum in a short time. Jet air extractor can be divided into steam jet air extractor and water jet air extractor according to different working media.

  The principle of these two kinds of air extractors is basically the same, but the difference is only the working medium. The working medium of steam jet extractor is pressure steam, and the working medium of water jet extractor is pressure water. Small-capacity units mostly adopt steam injection type. For high-parameter and large-capacity units, because the sliding parameter start-up mode is adopted, it is impossible to have enough steam source to supply the steam ejector before the start-up of the unit. In addition, it is obviously extremely uneconomical to use steam throttled from high-pressure steam to 1.2~1.6MPa pressure for the steam ejector, and a steam ejector cooler is required to recover the working fluid, which makes the thermal system very complicated.

 Therefore, at present, large-capacity units in China adopt water jet air extractor, which is mainly composed of working water  inlet, working nozzle, mixing chamber, diffuser and check valve.
   Vacuum system of water jet air extractor. It consists of a water jet air extractor, a water jet pump, a water jet tank and a connecting pipeline. The exhaust of each low-pressure heater, condensate pump and drain pump flows into the condenser through the exhaust pipe, and the condenser is connected with the working room of the water jet air extractor. The water from the jet tank from circulating water or deep well is boosted by the jet pump (one is in normal operation and the other is standby) and then pumped into the jet air extractor. The high-speed water jet from the nozzle in the air extractor generates a high vacuum in the working room to extract the gas-steam mixture in the condenser, and these gas-steam mixtures return to the injection tank after being expanded.



3.Model description



4.Product and unit packages table

Turbine modelsModel"Pumping capacity
(kg/H)"
Pumps for use Motors"Number of units installed per machine
(one of which is a standby)"
Model  Flow rate   Lift
N3MW          The followingJSTD-7.07.0
0.004MPa
IS80-50-200A  60/h40mY160M1-2
(11KM)
 
N6-12MWJSTD-8.58.5
0.004MPa
IS100-65-200B  90m²/h   39mY160M-2
(18.5KM)
 
  N15MWJSTD-10.510.5
0.004MPa
IS100-65-200B  90m³/h   39mY160M-2
(18.5KM)
 
N25MWJSTD-12.512.5
0.004MPa
IS125-80-200A150m³/h  44m200L1-2
(30KM)
2(or1)
N50MW
(One programme)
JSTD-2020
0.004MPa
200S-42280m³/h  42m225M-2
(45KM)
2
N50MW
(Second option)
JSTD-3232
0.004MPa
250S-39A420m³/h  36mY250M-4
(55KM)
2
N100-135MWJSTD-4040
0.004MPa
250S-39486m³/h  39mY280S-4
(75KM)
2
N200MW
(One programme)
JSTD-8585
0.004MPa
350S-44A1116m³/h  36mJS116-4
(155KM)
2
N200MW
(Second option)
JSTD-9090
0.004MPa
350S-441260m³/h  44mJS2-400S-4
(220KM)
2
N300MWJSTD-9090
0.004MPa
350S-441260m³/h  44mJS2-400S-4
(220KM)
3
N600MWJSTD-9090
0.004MPa
350S-441260m³/h  44mJS2-400S-4
(220KM)
3

 

Detailed Photos

 

 

Company Profile
 
Lianyungang Jiusheng Electric Power Auxiliary Machinery Co., Ltd.


a national high-tech enterprise, is located at the foot of Jinping Mountain and beside the Qiangwei River. The factory is located in Lianyungang City, Jiangsu Province, the intersection of the the Belt and Road, and the east bridgehead of the Eurasian Continental Bridge.


It is adjacent to the 5A scenic spot of Huaguo Mountain and Liu Zhizhou Sports Park.


It is 5 kilometers away from the entrance and exit of the expressway, 13 kilometers away from the airport, and 36 kilometers away from the port.


It has convenient transportation by land, sea and air.   


The company was founded in 2012 with a registered capital of 51 million yuan and an area of 20,000 square meters. It has 6 standardized industrial plants, supporting office areas, living quarters and finished goods yards, with a building area of about 11,000 square meters. 



 
Our Advantages
  Jiusheng Company has honed a sword for ten years, casting the soul of the enterprise with the spirit of craftsman.
 

Under the careful creation of Chairman Xie Qizhi, it has grown into a well-known enterprise in the domestic power auxiliary machinery industry.
 

 It integrates the design, production and sales of electric auxiliary machinery, pressure vessels, chemical equipment and pipeline engineering installation services. 



It has the qualification of designing & manufacturing
D1 and D2 level pressure vessel , and the qualificaton of GB2 and GC2 pipeline engineering installation.
It passedISO9001 international quality system,ISO14001 environmental health management system, ISO45001 occupational health management system certification in the industry, and also owns Madrid international trademark and product import and export qualification.


  It has certain manufacturing experience in American standard and European standard pressure vessels and other products and has been recognized as a qualified supplier by more than 10 central enterprises in the industry, including CNNC, Sinopec, PetroChina, Huadian, Huaneng, China Resources, China Railway, China Energy Construction, China Power Construction, Guoneng, Everbright, etc.
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