Self-cleaning plate type filter press for mother liquor purification

Abstract

The invention discloses a self-cleaning plate-type filter press for mother liquor purification in the field of filtering equipment, the self-cleaning plate-type filter press comprises a frame body and an extrusion assembly, the frame body comprises two guide rails arranged in parallel, the extrusion assembly comprises a plurality of filter pressing plates located between the two guide rails, and the filter press further comprises a shaking mechanism and a flushing mechanism; the two shaking mechanisms are arranged on the two guide rails respectively, each shaking mechanism comprises a sliding block and a driving assembly for driving the sliding block to slide on the guide rails, and the sliding block is provided with a lifting assembly for lifting the filter pressing plate after the filter pressing plate is jacked up; the flushing mechanism comprises a door-shaped support and a telescopic assembly arranged on the guide rail in a sliding mode, the lower portion of the top of the support is provided with a telescopic assembly, and the telescopic end of the telescopic assembly faces downwards and is connected with a spraying assembly. According to the scheme, two processes of shaking off a large filter cake by shaking and flushing residual impurities in filter holes by spraying pressurized water are combined, so that the filter pressing plate is quickly and easily cleaned, and the effect of high cleanliness is achieved.

Description

Technical Field

[0001] The invention belongs to the field of filtering equipment, and in particular relates to a self-cleaning plate filter press for purifying mother liquid. Background Art

[0002] Mother liquor, commonly known as bittern, is the saturated solution remaining after the precipitate or crystal is separated during the chemical precipitation or crystallization process. At present, the mother liquor is concentrated in the industry and then cooled and crystallized to obtain the crude compound. After concentration, it still has a high water content. In order to further dehydrate and purify it, filtration dehydration, centrifugal dehydration and pressing dehydration can be used. Filtration dehydration mainly includes vacuum filtration and pressure filtration. Among them, pressure filtration dehydration is more commonly used, with low cost and high solid recovery rate. Sludge filtration dehydration uses the pressure difference on both sides of the filter medium as the driving force, so that the water is forced to pass through the filter medium to form a filtrate, and the solid particles are trapped on the medium to form a filter cake, thereby achieving the purpose of purification and dehydration.

[0003] Plate and frame filter press is a common intermittent filtering equipment for achieving solid-liquid two-phase separation. The plate and frame filter press includes alternately arranged filter plates and filter frames, with filter cloth sandwiched between each set of filter plates and filter frames. The filter plates and filter frames are provided with liquid channels. The filter plates and filter frames are pressed tightly to connect the liquid channels. The filter plates and filter plates are surrounded to form filter chambers. The liquid to be filtered is sent into each filter chamber through the liquid channel. The water is discharged from the drainage channel in the filter plate through the filter cloth. The solid particles are left in the filter chamber to form a filter cake. After the filter plates and filter frames are loosened, the filter cake can be easily peeled off, thereby achieving solid-liquid separation. Due to its advantages of large filtration driving force, high solid content of the filter cake, clear filtrate, and high solid recovery rate, it is widely used in many places.

[0004] Since a lot of solid filter residue will remain in the filter holes of the filter plate during filtration and cause blockage, the current solution is to disassemble the filter press, remove the filter plate, and vibrate the filter plate in batches to shake off the residue. However, this method cannot quickly shake off some residues with high viscosity or large particles. When solving this problem by increasing the vibration time and frequency, the bolt components that play a connecting and fixing role will become loose, increasing the frequency of subsequent maintenance, which will still reduce the filtration efficiency. Summary of the invention

[0005] The present invention is intended to provide a self-cleaning plate filter press for purifying mother liquor, so as to solve the problem that residual debris in filter plate pores of a plate-and-frame filter press in the prior art is difficult to clean.

[0006] A self-cleaning plate filter press for mother liquid purification in this scheme comprises a frame and an extrusion assembly, wherein the frame comprises two parallel guide rails, the extrusion assembly comprises a plurality of filter plates located between the two guide rails, the filter plates comprise filter plates and filter frames arranged alternately, a filter cloth is sandwiched between each set of filter plates and filter frames, and the filter press also comprises a shaking mechanism and a flushing mechanism;

[0007] There are two shaking mechanisms, which are respectively arranged on two guide rails. The shaking mechanism includes a slider and a driving assembly for driving the slider to slide on the guide rail. The slider is provided with a lifting assembly for lifting the filter press plate.

[0008] The flushing mechanism comprises a door-shaped bracket and a slide arranged on a guide rail. A telescopic component is arranged below the top of the bracket. The telescopic end of the telescopic component faces downward and is connected to a spray component.

[0009] The working principle of this scheme is: the shaking mechanism produces a shaking effect in the process of lifting and lowering the filter plate, shaking off the large pieces of filter cake attached to the filter plate, and then the spray component in the flushing mechanism sprays the entire vertical surface of the filter plate under the drive of the telescopic component, and the residue in the filter holes is flushed out under the action of water pressure.

[0010] The beneficial technical effect of this scheme is that this scheme combines the two processes of shaking off large pieces of filter cake with a few times and flushing the residual debris in the filter holes with pressurized water spray, which can quickly and easily clean the filter press plate and achieve a high degree of cleanliness. The shaking mechanism and the flushing mechanism are both slidably arranged on the guide rail, and the filter press plates that are closed during compression are separated one by one while being cleaned, thereby improving work efficiency.

[0011] Furthermore, the spray assembly includes two spray pipes, and a plurality of spray heads are respectively arranged on the sides of the two spray pipes away from each other, and the spray pipes are connected to a water source. The two spray pipes simultaneously rinse the two filter press plates, further improving the cleaning efficiency.

[0012] Furthermore, the telescopic assembly is a scissor-type lifting assembly. The scissor-type lifting assembly temporarily uses a temporary space in the longitudinal direction, and the single extension stroke is large, which helps the overall structure of the spray assembly to be more compact and stable.

[0013] Furthermore, the slider is sleeved on the guide rail, and the bottoms of both ends of the bracket are connected to the slider. The slider and the bracket are driven to move synchronously by a driving component, and the structure is simplified.

[0014] Furthermore, the driving assembly includes a first motor and a walking wheel. The first motor drives the walking wheel to roll on the guide rail. The walking wheel is rotationally connected to the slider, and the motor is installed on the slider.

[0015] Furthermore, a groove is provided on the top of the guide rail, and the travel wheel is located in the groove.

[0016] Furthermore, the lifting assembly includes a support block, the lower surface of the support block is connected to a support rod, the lower end of the support rod is connected to a supporting block, a slideway for accommodating the support rod is provided in the slider, a cam is rotatably connected in the slider below the slideway, and the cam is coaxially connected to a second motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic structural diagram of a self-cleaning plate filter press for mother liquor purification. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods:

[0019] The reference numerals in the drawings of the specification include: a frame 1, a groove 2, a guide rail 3, a wing plate 4, a support block 5, a slider 6, a first motor 7, a bracket 8, a spray head 9, a spray pipe 10, a hydraulic cylinder 11, and a filter press plate 12.

[0020] The embodiment is basically as shown in the attached Figure 1 As shown: a self-cleaning plate filter press for mother liquor purification, including a frame 1 and an extrusion assembly, the frame 1 includes two parallel guide rails 3, the extrusion assembly includes a plurality of filter plates 12 located between the two guide rails 3, the filter plates 12 include alternately arranged filter plates and filter frames, a filter cloth is sandwiched between each group of filter plates and filter frames, and wing plates 4 are provided on both sides of the filter frame in the vertical direction. The filter press also includes a shaking mechanism and a flushing mechanism.

[0021] A shaking mechanism is respectively provided on the two guide rails 3, and the shaking mechanism includes a slider 6 and a driving component for driving the slider 6 to slide on the guide rail 3. The slider 6 is sleeved on the guide rail 3, and a lifting component for lifting and lowering the filter plate 12 is provided on the slider 6. The lifting component includes a support block 5, and a support rod is connected to the lower surface of the support block 5, and a supporting block is connected to the lower end of the support rod. A slideway for accommodating the support rod is provided in the slider 6, and a cam is rotatably connected in the slider 6 below the slideway, and the cam is coaxially connected to the second motor.

[0022] The driving assembly includes a first motor 7 and a running wheel. The first motor 7 drives the running wheel to roll on the guide rail 3. The running wheel is rotatably connected to the slider 6. The motor is mounted on the slider 6. A groove 2 is provided at the top of the guide rail 3, and the running wheel is located in the groove 2.

[0023] The flushing mechanism includes a door-shaped bracket 8, the bottoms of both ends of the bracket 8 are connected to the slider 6, a telescopic component is provided below the top of the bracket 8, the telescopic component is a hydraulic cylinder 11, and a scissor-type lifting component can also be selected. The telescopic end of the telescopic component faces downward and is connected to a spray component. The spray component includes two spray pipes 10, and a plurality of spray heads 9 are respectively provided on the side away from each other of the two spray pipes 10, and the spray pipes 10 are connected to a water source.

[0024] The specific implementation process is as follows: after the filter press plate 12 compresses and filters the mother liquor, the shaking mechanism slides one by one to the bottom of the side wing plate 4 of the filter press plate 12 and lifts up the filter press plate 12. The shaking mechanism produces a shaking effect in the process of lifting and lowering the filter press plate 12, and the large pieces of filter cake attached to the filter plate are shaken off. Then, the spray component in the flushing mechanism sprays the entire vertical surface of the filter plate under the drive of the telescopic component, and the residue in the filter hole is flushed out under the action of water pressure.

Claims

1. A self-cleaning plate filter press for mother liquid purification, comprising a frame and an extrusion assembly, wherein the frame comprises two parallel guide rails, the extrusion assembly comprises a plurality of filter press plates located between the two guide rails, the filter press plates comprise filter plates and filter frames arranged alternately, and a filter cloth is sandwiched between each set of filter plates and filter frames, and characterized in that: The filter press also includes a shaking mechanism and a flushing mechanism; There are two shaking mechanisms, which are respectively arranged on two guide rails. The shaking mechanism includes a slider and a driving assembly for driving the slider to slide on the guide rail. The slider is provided with a lifting assembly for lifting the filter press plate. The flushing mechanism comprises a door-shaped bracket and a slide arranged on a guide rail. A telescopic component is arranged below the top of the bracket. The telescopic end of the telescopic component faces downward and is connected to a spray component.

2. A self-cleaning plate filter press for mother liquor purification according to claim 1, characterized in that: The spray assembly comprises two spray pipes, and a plurality of spray heads are respectively arranged on the sides of the two spray pipes which are away from each other, and the spray pipes are connected to a water source.

3. A self-cleaning plate filter press for mother liquor purification according to claim 2, characterized in that: The telescopic assembly is a scissor-type lifting assembly.

4. A self-cleaning plate filter press for mother liquor purification according to claim 3, characterized in that: The slide block is sleeved on the guide rail, and the bottoms of both ends of the bracket are connected to the slide block.

5. A self-cleaning plate filter press for mother liquor purification according to claim 4, characterized in that: The driving assembly comprises a first motor and a running wheel. The first motor drives the running wheel to roll on the guide rail. The running wheel is rotationally connected to the slider, and the motor is mounted on the slider.

6. A self-cleaning plate filter press for mother liquor purification according to claim 5, characterized in that: A groove is arranged on the top of the guide rail, and the travel wheel is located in the groove.

7. A self-cleaning plate filter press for mother liquor purification according to claim 6, characterized in that: The lifting assembly includes a support block, the lower surface of the support block is connected to a support rod, the lower end of the support rod is connected to a holding block, a slideway for accommodating the support rod is provided in the slider, a cam is rotatably connected in the slider below the slideway, and the cam is coaxially connected to a second motor.

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