Multistage power saving vacuum device with root vacuum pump in first stage
a vacuum pump and multi-stage technology, applied in the direction of liquid fuel engines, machines/engines, rotary piston liquid engines, etc., can solve the problems of affecting the temperature of water sources, the efficiency of pumping gas is reduced quickly to 80% to 90% of the original quality, and the volume of the gas to be vented out has greatly decreased, so as to achieve the effect of reducing power consumption and high efficiency
Inactive Publication Date: 2019-10-10
ELIVAC COMPANY
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Benefits of technology
The present invention is a vacuum device that reduces power consumption by using a root vacuum pump in the first stage and at least one second stage vacuum pump to further process the pumping gas. This results in a significant reduction in the volume of gas that needs to be vented, resulting in reduced power consumption.
Problems solved by technology
The efficiencies of these vacuum pumps are very low and difficult to be controlled.
However, temperature of water source is affected by climates and seasons.
When cooling water has higher temperature, the vacuum of a vacuum pump will be destroyed so that efficiency of pumping gas is reduced quickly to 80% to 90% of the original quality, and thus, the operation efficiency is affected greatly.
Even when the gas pumping under a predetermined pressure in the inlet of the system is reduced to zero, gas etching will generate, this will destroy the equipments and thus the safety operation will be affected dramatically.
Therefore, it is often to use two vacuum pumps to retain the vacuum of the condenser and thus to retain the vacuum efficiency of the whole system, but this cause waste of energy.
Method used
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Embodiment Construction
[0009]With reference to FIGS. 1 to 3, the structure of the invention is illustrated. As those shown in FIGS. 1 to 3, in this the invention, a cooling process of three stages is used as an example for describing the structure of the invention, but the invention is not limited to the three stage structure. The structure of the invention includes the following elements.
[0010]A vacuum inlet air-driving shut-off valve 13 serves for receiving non-condensing gas sucked from a power plant condenser (not shown).
[0011]A first root vacuum pump 1 is connected to the vacuum inlet air-driving shut-off valve 13 and serves to receive and compress gas outputted from the vacuum inlet air-driving shut-off valve 13. The first root vacuum pump 1 comprises the following elements.
[0012]A first vacuum tube 100 is connected to the vacuum inlet air-driving shut-off valve 13. The first vacuum tube 100 receives gas from the vacuum inlet air-driving shut-off valve 13 and then the gas thereinwithin is compressed...
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A multistage power saving vacuum device with a root vacuum pump in a first stage comprises a vacuum inlet gas-driving shut-off valve for receiving non-condensing gas pumping from a power plant condenser; a first root vacuum pump connected to the vacuum inlet gas-driving shut-off valve for receiving and compressing the gas outputted from the vacuum inlet gas-driving shut-off valve; a second vacuum pump serially connected to the first root vacuum pump for further compressing the gas from the first root vacuum pump. A last stage vacuum pump connected to the second vacuum pump for further compressing the gas outputted from the second vacuum pump; and a vapor separator connected to the last stage vacuum pump for separating vapor and air; wherein the gas is vented out and the vapor is returned to the last stage vacuum pump.
Description
FIELD OF THE INVENTION[0001]The present invention relates to vacuum pump systems, in particular to a multistage power saving vacuum device with a root vacuum pump in a first stage.BACKGROUND OF THE INVENTION[0002]In a fired power plant, vacuum of a gas condenser has a great effect to consumption of coals in power generation. For a power generator of 300 to 330 MW, a promotion of 1 Kpa in vacuum level will induce consumption of the coals to be reduced with a rate of 2.6 g / kWh. Current used gas vacuum devices in fired power plant are water jet vacuum pumps, water ring / liquid ring pumps or steam vacuum pumps, in these vacuum pumps, water is used a working medium. Efficiencies of these vacuum pumps are related to temperature and pressures of water. The efficiencies of these vacuum pumps are very low and difficult to be controlled.[0003]For example, operation temperature has a great effect to the quality of a water ring pump, while generally a fired power plant uses nature water sources ...
Claims
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IPC IPC(8): F04D15/00F04D13/12F04D31/00
CPCF04D15/0011F04D31/00F04D13/12F04C23/005F04C25/02F04C23/001F04C28/02F04C18/126F04C19/00F04C28/08F04C2240/81F04C23/00F04C23/003F04C28/24F04C28/26F04C2220/10F04C2270/18F04C2270/19F04C2270/42F04C2270/44
Inventor SHAW, RAYMOND ZHOURONG, YIWU, BIN
Owner ELIVAC COMPANY