Intelligently balancing liquid-discharge system of vacuum filtration machine

Abstract

The invention relates to an intelligent balance draining device, applying to a device utilizing vacuum for a solid-liquid separation. In an intelligent balance draining system of a vacuum filter, a vacuum pump 8 is connected with a port on an upper end of a draining tank 7 by a hose 9; the port on a side face of the draining tank is connected with a vacuum filter 3, which constitutes a steady vacuum system; the invention is characterized in that the intelligent balance draining system comprises an energy saving auxiliary draining system; a filtrate pump 4 is connected with the draining tank 7 by a pipeline; another end of the filtrate pump 4 is connected with an automatic drain valve 1 by the pipeline; the automatic drain valve 1 is connected with a gas nipple 6 on the draining tank by a hose 5. The invention has the following advantages: 1. the sealing effectiveness is good, which guarantees the stability of the vacuum system and reduces the energy consumption of the vacuum pump; 2. a fluid level gauge is not needed to measure the liquid level; depending on the auxiliary draining system, the liquid level is measured; and the height of the automatic valve port and the filtrate pump body is controlled; the liquid is always in the pump, which can not lead the pump start up without the liquid and saves the production cost of the auxiliary draining system; 3. the structure is simple, thereby reducing the maintenance cost and decreasing the labour intensity; 4. the mounting height is not required, thereby saving the construction cost of factory buildings.

Description

technical field [0001] The invention relates to a novel intelligent balanced liquid discharge device in vacuum dehydration equipment, which is applied to equipment for solid-liquid separation using vacuum, and is specifically a negative pressure liquid discharge device. It belongs to the technical field of vacuum filters. Background technique [0002] Vacuum filters use negative pressure to separate solids and liquids through filter media. During work, solids and liquids are adsorbed to the surface of the filter medium at the same time, solid particles are trapped on the surface of the filter medium, and the liquid passes through the filter medium into the pipeline with negative pressure and the drain tank. Since the drain tank is connected to the vacuum pump, the vacuum pump is used to The suction creates a negative pressure, which creates a pressure difference between the vacuum system and the outside world, thereby achieving the purpose of filtration. [0003] In the ap...

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Problems solved by technology

[0003] In the application of vacuum draining, the following two methods are generally used for draining: one way is to rely on the switching between the atmospheric switching valve and the vacuum switching valve to realize automatic draining. When the draining tank is connected to the atmosphere, the inside and outside of the draining tank There is no pressure difference, the liquid in the drain tank is discharged by its own gravity, and then switch to the vacuum switch valve after draining, the automatic drain will reduce the vacuum of the whole equipment, causing the equipment to not be able to operate stably; another way is to require filtrate The pump drains, and the suction of the filtrate pump must be greater than the negative pressure in the drain tank to pump out the liquid in the drain tank. In this way, a filtrate pump with relatively large power and lift is required to achieve a good filtration effect.

[0004] The current vacuum dehydration equipment needs stable filtration, so as not to affect the filtration effect due to insufficient vacuum, so that the moisture content of the filter cake cannot achieve the desired effect in production, so it is necessary to increase the vacuum pumping capacity and power, which increases energy consumption.

[0005] At present, the vacuum dehydration system relies on the filtrate pump to drain the liquid, and one relies on the stop of the filtrate pump to control the drainage, which affects the service life of the filtrate pump, and the filtrate pump of the system cannot work continuously

The other is to rely on the high and low liquid level detection of the liquid level gauge to control the pneumatic valve, which increases the use cost and maintenance cost

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