CN217015714U - Polymer polyol filtering device - Google Patents

Abstract

The utility model relates to a polymer polyol filtering device, which mainly solves the problems of large on-site smell, large artificial load and large material loss caused by open type filtering of polymer polyol in the prior art. The utility model adopts a polymer polyol filtering device, which comprises a day tank (1), a flexible knife filter (2), a vibrating screen (3), a control cabinet (4) and a filtrate tank (5); the flexible knife filter (2) is provided with a controller (2-3), is connected with the tank (1) in the same day through a feeding pipeline, is connected with the filtrate tank (5) through a discharging pipeline, and is connected with the oscillating screen (3) through a slag discharging pipeline; the oscillating screen (3) is provided with an infrared inductor (3-1) which is connected with a filtrate tank through a filtrate pipeline, the filtrate pipeline is provided with a filtrate valve (3-2), and the infrared inductor (3-1), the filtrate valve (3-2) and the control cabinet (4) are connected in a linkage manner, so that the problem is solved well, and the oscillating screen can be used in the industrial production of polymer polyol.

Description

Polymer polyol filtering device

Technical Field

The utility model relates to the field of polymer polyol, in particular to a polymer polyol filtering device.

Background

Polymer polyols (POPs), also known as white polyether polymer polyols, are polymer-polyether dispersions, which are organic filled polyether polyols, used to prepare high load-bearing or high modulus flexible and semi-rigid polyurethane foam articles. In the preparation process of the POP, in order to keep the organic particles in the POP in a proper particle size distribution, a dispersing agent is required to be added, large organic particles are inevitably generated, and the existence of the large organic particles brings disadvantages to the production of polyurethane foam plastics, so that the POP material is required to be processed through a filtering system in the preparation process of the POP to ensure that no large organic particles exist in the POP product.

The conventional filtering method is to use a vibrating screen for open-type filtering, the filtering speed is manually adjusted by field personnel, filter residues on a filter screen are manually removed, and the risk of material overflow from the vibrating screen can also occur due to residue accumulation in the later period; on the other hand, the POP material has pungent smell, and particularly when the temperature of the material reaches about 100 ℃, the operation environment is poor, and workers are exposed to the environment with high temperature, high noise and high pungent smell for a long time to damage the health of the human body.

Chinese patent CN215359363U discloses a vibrating screen for preventing material splashing, which comprises a base, a vibrating spring, a discharge chamber, a separation chamber with a screen at the bottom and a vibrating screen cover, wherein one side of the separation chamber is provided with an impurity discharge port, one side of the discharge chamber is provided with a product discharge port, an annular material baffle plate is arranged inside the edge of the vibrating screen cover, the upper part of the vibrating screen cover is provided with a feed port, and a feed distributor is arranged below the feed port, so that the material splashing is prevented, the force of the material impacting the screen is reduced, and the screen is prevented from breaking; however, filter residues on the screen still need to be manually removed, the risk of material overflow exists after the residues are accumulated, the material loss is large, manual observation is needed, and a large amount of heat and odor are emitted to harm human bodies on site.

Chinese patent CN202246501U discloses a device for improving filtration efficiency in polymer polyol production process, including reation kettle, deodorization cauldron and finished product storage tank, wherein, be equipped with the centrifugal separator between reation kettle and the deodorization cauldron, improved the transfer and the filtration efficiency of material, but the filtration of POP product need be filtered with high number filter screen, and POP material viscosity is big, and the centrifugal separator filters and can only separate the large granule, and dregs filter inadequately, inefficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that in the prior art, the polymer polyol open type filtration causes large site odor, large manual operation load and large material loss, and provides a polymer polyol filtration device which has the advantages of closed type automatic filtration, small site odor, small manual operation load and small material loss.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a polymer polyol filtering device comprises a day tank 1, a flexible knife filter 2, a vibrating screen 3, a control cabinet 4 and a filtrate tank 5; the flexible knife filter 2 is provided with a controller 2-3, a material inlet, a material outlet and a slag discharge port, is connected with the day tank 1 through a feeding pipeline, is connected with the filtrate tank 5 through a discharge pipeline, and is connected with the oscillating screen 3 through a slag discharge pipeline, the feeding pipeline at the material inlet is provided with an inlet valve 2-4 and an inlet pressure detector 2-5, the discharging pipeline at the material outlet is provided with an outlet valve 2-6 and an outlet pressure detector 2-7, the slag discharge pipeline at the slag discharge port is provided with a slag discharge valve 2-8, and the inlet valve 2-4, the inlet pressure detector 2-5, the outlet valve 2-6, the outlet pressure detector 2-7 and the slag discharge valve 2-8 are all connected with the controller 2-3, so that the interlocking control of filtering and slag discharge is realized; the oscillating screen 3 is provided with an infrared sensor 3-1, a slag inlet and a filtrate outlet, and is connected with a filtrate tank 5 through a filtrate pipeline, a filtrate valve 3-2 is arranged on the filtrate pipeline at the filtrate outlet, and the infrared sensor 3-1 and the filtrate valve 3-2 are both connected with the control cabinet 4, so that the oscillating screen receives the linkage control of filter residue and filtration.

Furthermore, a stirring device 2-1 and a filter screen 2-2 are arranged in the soft knife filter 2, a filter residue groove is formed in the bottom of the soft knife filter, and a scraper for removing filter residues on the filter screen 2-2 is arranged on the stirring device 2-1.

Further, the controller 2-3 is a PLC controller.

Furthermore, the mesh number of the filter screen 2-2 is 150-300 meshes.

The filtration process is as follows:

when POP materials in a day tank are directly beaten into a flexible knife filter through a pump, the beating speed is about 0.4Mpa by adjusting the pressure of the outlet of the pump, an operator operates the flexible knife filter through a controller of the flexible knife filter, the materials enter the flexible knife filter for filtering, filtrate passes through a filter screen and is conveyed to a filtrate tank through a discharge pipeline, filter residues are ceaselessly scraped into a filter residue tank at the bottom of the filter through a rotary scraper, when the pressure of a material outlet in the filter residue tank reaches a certain amount, the filtering speed is reduced while the pressure of the material outlet is increased, an inlet valve, an outlet valve and a pressure detector are arranged on a material inlet and outlet pipeline of the flexible knife filter, a filtrate pipeline at the filtrate outlet is provided with the filtrate valve, the inlet valve, the outlet valve, the pressure detector and the filtrate valve are controlled by a PLC controller in a linkage manner, the pressure difference between the material inlet and the material outlet is controlled to be 0.2Mpa, and when the pressure difference exceeds 0.2Mpa, the inlet valve and the outlet valve are automatically closed, the slag discharging valve is automatically opened, slag is automatically discharged to the oscillating screen for secondary oscillation recovery, and when the pressure difference between an inlet and an outlet of the flexible knife filter is lower than a set value, the inlet valve and the outlet valve are automatically opened for material feeding and filtering, and the slag discharging valve is closed; in addition, an infrared sensor interlocked with the control cabinet is arranged on the oscillating screen, when the infrared sensor senses that materials enter the oscillating screen, the oscillating screen automatically starts to oscillate, and filtrate is conveyed to a filtrate tank.

The utility model provides a polymer polyol filtering device, wherein POP materials are subjected to closed filtering in a soft knife filter, and the filtering and deslagging are automatic; simultaneously, the filter residue continues the secondary oscillation through the shale shaker that is equipped with infrared inductor, can further filter the POP material that remains in the filter residue and retrieve out, has reduced the filter residue and has lost admittedly, and whole filtration process automation control has reduced the manual operation frequency, has reduced the degree that irritability smell gived off in the material, has improved operational environment, has gained better technological effect.

Drawings

FIG. 1 is a schematic structural view of a polymer polyol filtration apparatus provided by the present invention.

In the attached figure 1, 1 is a day tank, 2 is a soft knife filter, 2-1 is a stirring device, 2-2 is a filter screen, 2-3 is a controller, 2-4 is an inlet valve, 2-5 is an inlet pressure detector, 2-6 is an outlet valve, 2-7 is an outlet pressure detector, 2-8 is a slag discharge valve, 3 is an oscillating screen, 3-1 is an infrared inductor, 3-2 is a filtrate valve, 4 is a control cabinet, and 5 is a filtrate tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[ example 1 ]

A polymer polyol filtering device comprises a day tank 1, a flexible knife filter 2, a vibrating screen 3, a control cabinet 4 and a filtrate tank 5; wherein, the first and the second end of the pipe are connected with each other,

the soft knife filter 2 is provided with a stirring device 2-1, a 150-mesh filter screen 2-2, a filter slag groove, a PLC controller 2-3, a material inlet, a material outlet and a slag discharge port, wherein the stirring device 2-1 is provided with a scraper for removing filter slag on the filter screen 2-2, is connected with the day tank 1 through a feed pipeline, is connected with a filter liquid groove 5 through a discharge pipeline, and is connected with the oscillating screen 3 through a slag discharge pipeline, the feed pipeline at the material inlet is provided with an inlet valve 2-4 and an inlet pressure detector 2-5, the discharge pipeline at the material outlet is provided with an outlet valve 2-6 and an outlet pressure detector 2-7, the slag discharge pipeline at the slag discharge port is provided with a slag discharge valve 2-8, the inlet valve 2-4, the inlet pressure detector 2-5, the outlet valve 2-6, the outlet pressure detector 2-7 and the slag discharge valve 2-8 are all connected with the controller 2-3, realize the interlocking control of filtration and slag discharge;

the oscillating screen 3 is provided with an infrared inductor 3-1, a slag inlet and a filtrate outlet, and is connected with a filtrate tank 5 through a filtrate pipeline, a filtrate valve 3-2 is arranged on the filtrate pipeline at the filtrate outlet, and the infrared inductor 3-1 and the filtrate valve 3-2 are both connected with the control cabinet 4, so that the oscillating screen receives filter residues and is linked with filtration.

The filtration process is as follows:

the POP material CHP-H45 of the day tank is beaten into the flexible knife filter, the pressure difference of the inlet and the outlet of the material is set to be 0.2MPa through a PLC controller of the flexible knife filter, the material enters the flexible knife filter for filtering, filtrate is conveyed to a filtrate tank, filter residue is continuously scraped into a filter residue tank through a scraper, the pressure of the material outlet is increased after the filter residue is accumulated, the filtering speed is reduced, when the pressure difference exceeds 0.2MPa, the inlet and outlet valves are closed, a deslagging valve is opened, deslagging is automatically carried out to the oscillating screen for secondary oscillation recovery, when the pressure difference of the inlet and the outlet is lower than a set value, the inlet valve and the outlet valve are opened, and the deslagging valve is closed to continue the material filtering; in addition, the infrared sensor senses that materials enter the vibrating screen, then the vibrating screen is started, the filtrate valve is opened, and filtrate enters the filtrate tank. After filtration, 500kg of more materials can be recovered in a CHP-H45 day tank for collecting 75 tons of materials, and 540 tons of materials can be recovered in one year, so that the material loss is reduced.

By adopting the polymer polyol filtering device provided by the utility model, the POP material is subjected to closed automatic filtering in the flexible knife filter, and the filter residue is continuously subjected to secondary oscillation through the oscillating screen, so that the solid waste amount and material loss of the filter residue are reduced, the manual operation frequency is reduced, the emission of pungent odor in the material is reduced, the operation environment is improved, a better technical effect is obtained, and the polymer polyol filtering device can be used in the industrial production of polymer polyol.

Claims (4)

1. A polymer polyol filtering device is characterized by comprising a day tank (1), a flexible knife filter (2), a vibrating screen (3), a control cabinet (4) and a filtrate tank (5); wherein the flexible knife filter (2) is provided with a controller (2-3), a material inlet, a material outlet and a slag discharge port, is connected with the day tank (1) through a feeding pipeline, is connected with the filtrate tank (5) through a discharging pipeline, is connected with the oscillating screen (3) through a slag discharge pipeline, the feeding pipeline at the material inlet is provided with an inlet valve (2-4) and an inlet pressure detector (2-5), the discharging pipeline at the material outlet is provided with an outlet valve (2-6) and an outlet pressure detector (2-7), the slag discharge pipeline at the slag discharge port is provided with a slag discharge valve (2-8), the inlet valve (2-4), the inlet pressure detector (2-5), the outlet valve (2-6), the outlet pressure detector (2-7) and the slag discharge valve (2-8) are all connected with the controller (2-3), realize the interlocking control of filtration and slag discharge; the vibrating screen is characterized in that an infrared inductor (3-1), a slag inlet and a filtrate outlet are arranged on the vibrating screen (3), a filtrate pipeline is connected with a filtrate tank (5), a filtrate valve (3-2) is arranged on the filtrate pipeline at the filtrate outlet, and the infrared inductor (3-1) and the filtrate valve (3-2) are connected with a control cabinet (4) to realize the interlocking control of receiving filter residues and filtering by the vibrating screen.

2. The polymer polyol filtering device according to claim 1, wherein a stirring device (2-1) and a filter screen (2-2) are arranged in the flexible knife filter (2), a filter residue tank is arranged at the bottom of the flexible knife filter, and a scraper for removing filter residues on the filter screen (2-2) is arranged on the stirring device (2-1).

3. The polymer polyol filtration device according to claim 1, wherein said controller (2-3) is a PLC controller.

4. The polymer polyol filtering device according to claim 2, wherein the mesh number of the filter net (2-2) is 150-300 mesh.

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