CN-224220837-U - Double-diaphragm filter press

CN224220837UCN 224220837 UCN224220837 UCN 224220837UCN-224220837-U

Abstract

The utility model discloses a double-diaphragm filter press, which comprises a feeding machine seat and a movable pressing machine seat, wherein a plurality of filter plate assemblies are arranged between the feeding machine seat and the movable pressing machine seat, medium inlet channels and medium outlet channels are arranged on the feeding machine seat, the filter plate assemblies and the movable pressing machine seat, the double-diaphragm filter press also comprises a medium circulation heating device, the outlet end of the medium circulation heating device is connected with the medium inlet channels on the feeding machine seat, the medium outlet channels on the feeding machine seat are connected with the inlet end of the medium circulation heating device, the filtrate outlet channels of the feeding machine seat are connected with a filter pressing filtrate outlet pipe and a squeezing filtrate outlet pipe, and the squeezing filtrate outlet pipe is connected with a negative pressure generator. The filter chamber is in a negative pressure state through the negative pressure generator, and the medium circulation heating device enables the squeezing medium to be in a high temperature state, so that a filter cake dehydration effect with lower water content and more uniformity can be obtained under the same squeezing pressure condition, and a more scientific solution is provided for filter press dehydration.

Inventors

XU XIAOXI
DENG XIAOHU
LI MING

Assignees

成都兴荣成压滤机有限公司

Dates

Publication Date: 20260512
Application Date: 20250605

Claims (9)

1. The double-diaphragm filter press comprises a feeding machine seat and a movable pressing machine seat, wherein a plurality of filter plate assemblies are arranged between the feeding machine seat and the movable pressing machine seat, a material feeding channel and a filtrate discharging channel are arranged on the feeding machine seat, the filter plate assemblies and the movable pressing machine seat, and the double-diaphragm filter press is characterized in that a medium inlet channel and a medium discharging channel for heat conduction and pressing medium to flow are arranged on the feeding machine seat, the double-diaphragm filter press also comprises a medium circulation heating device, an outlet end of the medium circulation heating device is connected with the medium inlet channel on the feeding machine seat, the medium discharging channel on the feeding machine seat is connected with an inlet end of the medium circulation heating device, a filter pressing filtrate discharging pipe and a pressing filtrate discharging pipe are connected with valves, and the filter pressing filtrate discharging pipe is connected with a negative pressure generator.
2. The filter press filter with double diaphragms of claim 1, wherein the filter plate assembly comprises a diaphragm plate, a heat-conducting pressing diaphragm sheet and filter cloth are sequentially arranged on the end face of the diaphragm plate outwards, the heat-conducting pressing diaphragm sheet and the diaphragm plate form a heat-conducting pressing cavity, and the medium inlet channel and the medium outlet channel are both communicated with the heat-conducting pressing cavity.
3. The double-diaphragm filter press of claim 1, wherein the medium circulation heating device comprises a heating device and a medium heat-preserving storage tank, the medium heat-preserving storage tank is connected with a medium inlet channel on the feeding machine base through a high-pressure conveying pump, a medium outlet channel on the feeding machine base is connected with an inlet end of the medium heat-preserving storage tank through a liquid return pipe, and a pressure regulating valve is arranged on the liquid return pipe.
4. A double-diaphragm filter press as set forth in claim 3 wherein the outlet end of the medium heat-preserving tank is connected to the inlet end of the heating device, the outlet end of the heating device is connected to the inlet end of the medium heat-preserving tank, and the heating device or the medium heat-preserving tank is connected to the liquid supplementing port.
5. The double membrane filter press of claim 1, wherein the filter press filtrate discharge pipe is connected to a filtrate collection tank.
6. The double membrane filter press of claim 5, wherein the filtrate outlet of the negative pressure generator is connected with the filtrate collecting tank, and the negative pressure generator is provided with a vacuum pressure gauge and a thermometer.
7. A double membrane filter press as claimed in claim 2, wherein said heat conducting press membrane sheet is provided with filter nails adapted to said filter cloth.
8. The double-membrane filter press of claim 1, wherein the movable press frame is provided with a feed channel interconnecting pipe, and the feed channel interconnecting pipe is connected with two material feed channels on the movable press frame.
9. A double membrane filter press as claimed in claim 2 wherein the membrane plate is provided with a feed branch channel communicating the filter chamber with the material feed channel.

Description

Double-diaphragm filter press Technical Field The utility model relates to the technical field of filter presses, in particular to a double-diaphragm filter press. Background In the dehydration process of the membrane filter press, in order to obtain a filter cake with more ideal solid content, the prior art generally adopts the membrane extrusion pressure of the equipment as much as possible to further reduce the water content of the filter cake, so that the membrane application pressure of the membrane filter press can be greatly amplified theoretically, and the way of increasing the membrane extrusion pressure can directly solve the problem that the insufficient solid content of the filter cake is caused by insufficient membrane extrusion pressure, but also increases a plurality of negative effects. For example, the problem of double superposition of safety and cost caused by excessive back pressure of the oil cylinder is that the filter plate (diaphragm plate) is in a high-load state for a long time is extremely likely to be damaged by fatigue and the like in advance, and the effect of reducing water content of the filter cake of most materials after the squeezing pressure is increased to a certain degree is not obvious. There is therefore a need for a more efficient dewatering treatment scheme to increase cake dewatering and reduce water content and production costs. Disclosure of utility model The utility model aims to provide a double-diaphragm filter press, which utilizes the physical characteristic that the boiling point temperature of liquid is reduced in a negative pressure environment, the residual liquid in a filter cake is easier to evaporate in the boiling environment, the required pressing pressure is lower when the same solid content result of the filter cake is achieved, the solid content of the filter cake is lower and more uniform, and a more scientific solution is provided for dehydration of the filter press. The aim of the utility model is achieved by the following technical scheme: the utility model provides a double-diaphragm filter press, including feeding frame and activity compress tightly the frame, be equipped with a plurality of filter plate subassemblies between feeding frame and the activity compress tightly the frame, feeding frame, filter plate subassembly, activity compress tightly and be equipped with material feed channel and filtrate discharge channel on the frame, feeding frame, filter plate subassembly, activity compress tightly and be equipped with the medium entering passageway and the medium discharge channel that are used for the heat conduction to squeeze the medium flow on the frame, still including medium circulation heating device, medium circulation heating device's exit end is connected the medium entering passageway on the feeding frame, medium discharge channel on the feeding frame is connected medium circulation heating device's entry end, the filtrate discharge channel of feeding frame is connected with the filter pressing filtrate discharge pipe and squeezes the filtrate discharge pipe, all be equipped with the valve on filter pressing filtrate discharge pipe and the squeeze filtrate discharge pipe, it has negative pressure generator to squeeze the filtrate discharge pipe. Further, the filter plate assembly comprises a diaphragm plate, the end face of the diaphragm plate is outwards provided with a heat conduction squeezing diaphragm sheet and filter cloth in sequence, the heat conduction squeezing diaphragm sheet and the diaphragm plate form a heat conduction squeezing cavity, and the medium inlet channel and the medium outlet channel are both communicated with the heat conduction squeezing cavity. Further, the medium circulation heating device comprises a heating device and a medium heat preservation storage tank, the medium heat preservation storage tank is connected with a medium inlet channel on the feeding machine seat through a high-pressure conveying pump, a medium discharge channel on the feeding machine seat is connected with an inlet end of the medium heat preservation storage tank through a liquid return pipe, and a pressure regulating valve is arranged on the liquid return pipe. Further, the outlet end of the medium heat preservation storage tank is connected with the inlet end of the heating device, the outlet end of the heating device is connected with the inlet end of the medium heat preservation storage tank, and the heating device or the medium heat preservation storage tank is connected with a liquid supplementing port. Further, a filter pressing filtrate discharge pipe is connected with a filtrate collecting tank. Further, a filtrate outlet of the negative pressure generator is connected with a filtrate collecting tank, and a vacuum pressure gauge and a thermometer are arranged on the negative pressure generator. Further, a filter nail which is matched with the filter cloth is arranged on the heat conduction squeezing diaphragm. Furt