Filtering device for polyether polyol production

Abstract

The utility model belongs to the technical field of polyether polyol production equipment, and discloses a filtering device for polyether polyol production, a multi-stage filtering device is arranged in a shell, the multi-stage filtering device comprises a fixed cylinder body and a plurality of stainless steel filtering cylinders with different diameters, and the stainless steel filtering cylinders are clamped on the inner side of the fixed cylinder body; a baffle plate is mounted in the shell and is positioned between the feeding hole and the multi-stage filtering device; the lower end of the shell communicates with a dirt collecting tank which is located at the lower end of the baffle. The baffle is arranged at the position of the inlet for baffling, and falling impurities can be collected in cooperation with the dirt collecting tank, so that follow-up cleaning or deslagging operation is facilitated; the multi-stage filtering device comprises a fixed barrel and a plurality of stainless steel filter cartridges with different diameters, the mesh density of the filter cartridges is gradually increased from front to back, impurities in raw materials can be removed step by step, the filtering precision is improved, and the device is relatively simple in structure and easy to install and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyether polyol production equipment, in particular to a filtering device for polyether polyol production. Background Art

[0002] At present, in the production process of polyether polyols, the purity of raw materials and the quality of products are crucial. In order to obtain high-purity polyether polyols, its production process needs to be accurately filtered and graded.

[0003] Traditional filtration devices usually use a single filter screen or multi-layer laminates for filtration. These methods can meet basic filtration needs in some cases, but have certain limitations when high fineness requirements are required or complex materials are processed. For example, a single filter screen may be blocked or damaged after long-term use, affecting the filtration effect; and the structure of multi-layer laminates is too complicated and difficult to clean and replace.

[0004] Through the above analysis, the problems and defects of the prior art are as follows: the traditional filtration device for polyether polyol production is easy to be clogged or damaged, which affects the filtration effect; the structure is too complicated and difficult to clean and replace. Utility Model Content

[0005] In order to overcome the problems existing in the related technology, the utility model provides a filtering device for producing polyether polyols.

[0006] The technical solution of the utility model is as follows:

[0007] A filtering device for producing polyether polyols is provided with a shell, a feed port and a discharge port are respectively provided on both sides of the shell, the feed port and the discharge port are respectively connected with a feed pipeline and a discharge pipeline, a multi-stage filtering device is installed inside the shell, the multi-stage filtering device comprises a fixed cylinder and a plurality of stainless steel filter cartridges with different diameters, the stainless steel filter cartridge is clamped inside the fixed cylinder, the plurality of stainless steel filter cartridges are sleeved with each other, and the mesh density of the plurality of stainless steel filter cartridges increases gradually from front to back;

[0008] A baffle is installed inside the shell, the upper end of the baffle is fixedly connected to the top of the shell, and the baffle is located between the feed inlet and the multi-stage filtering device;

[0009] The lower end of the shell is connected to a dirt collecting tank, and the dirt collecting tank is located at the lower end of the baffle.

[0010] In one embodiment, the upper end of the discharge pipeline is connected to a liquid storage tank through a branch pipeline and a backwash pump, the feed pipeline and the discharge pipeline are respectively installed with a solenoid valve, and the backwash pump and the solenoid valve are connected to the controller through a connecting line.

[0011] In one embodiment, the sewage collecting tank is provided with a tank body and a sewage discharge valve, the sewage discharge valve is connected to the lower end of the tank body, and the tank body is a conical barrel structure.

[0012] In one embodiment, the inner wall of the fixed cylinder is provided with a plurality of rows of limiting plates arranged in an annular manner, and a plurality of clamping plates are fixed to the edge of the stainless steel filter cylinder, and slots are reserved between adjacent clamping plates.

[0013] In one embodiment, adjacent rows of limiting plates are arranged in a staggered manner, and the slot width is greater than the limiting plate width.

[0014] In one embodiment, a sealing cover is detachably mounted on the rear end of the shell, and the discharge port is opened in the middle of the sealing cover.

[0015] In combination with all the above technical solutions, the beneficial effects of the utility model are as follows:

[0016] The utility model provides a baffle at the inlet position for deflection, and cooperates with a dirt collecting tank to collect fallen impurities for subsequent cleaning or slag discharge operations; the multi-stage filtering device includes a fixed cylinder and a plurality of stainless steel filter cartridges with different diameters, the mesh density of which gradually increases from front to back, and can gradually remove impurities in the raw materials to improve the filtering accuracy. The device has a relatively simple structure and is easy to install and maintain.

[0017] The utility model utilizes a discharge pipeline to be connected with a liquid storage tank and a backwashing pump. When backwashing is required, the backwashing pump is started to backwash the liquid in the liquid storage tank into the filter device for backwashing, which can automatically clean and avoid clogging.

[0018] The sewage collecting tank is located at the lower end of the baffle, which can collect the fallen impurities and discharge them regularly through the sewage valve. At the same time, the sewage valve is connected to the lower end of the tank body, and the tank body has a conical barrel structure, which can better collect and discharge impurities.

[0019] The fixed cylinder can better fix the stainless steel filter cartridge by using the limit plate to prevent it from moving or dislocating. The stainless steel filter cartridge can be conveniently clamped inside the fixed cylinder. Multiple stainless steel filter cartridges are connected to each other, making cleaning and replacement simple and quick. At the same time, a sealing cover is detachably installed at the rear end of the shell, and the discharge port is opened in the middle of the sealing cover, making cleaning and maintenance more convenient.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0022] Figure 1 It is a schematic diagram of the structure of a filtering device for producing polyether polyols provided in an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a multi-stage filtering device provided by an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of a card board provided in an embodiment of the utility model;

[0025] Figure 4 It is a structural schematic diagram of a sewage collecting tank provided by an embodiment of the utility model;

[0026] In the figure: 1. Shell; 2. Feed port; 3. Discharge port; 4. Feed pipeline; 5. Discharge pipeline; 6. Multi-stage filtration device; 601. Fixed cylinder; 602. Stainless steel filter cartridge; 7. Baffle; 8. Sewage collecting tank; 9. Branch pipeline; 10. Backwash pump; 11. Liquid storage tank; 12. Solenoid valve; 13. Controller; 14. Tank body; 15. Drain valve; 16. Limit plate; 17. Card plate; 18. Slot; 19. Sealing cover. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0028] like Figure 1 As shown, the filtering device for producing polyether polyols provided in the embodiment of the utility model comprises a shell (1), wherein a feed port (2) and a discharge port (3) are respectively provided on both sides of the shell (1), wherein the feed port (2) and the discharge port (3) are respectively connected to a feed pipeline (4) and a discharge pipeline (5), wherein a multi-stage filtering device (6) is installed inside the shell (1), wherein a baffle (7) is installed inside the shell (1), wherein the upper end of the baffle (7) is fixedly connected to the top of the shell (1), and the baffle (7) is located between the feed port (2) and the multi-stage filtering device (6); and wherein the lower end of the shell (1) is connected to a sewage collecting tank (8), wherein the sewage collecting tank (8) is located at the lower end of the baffle (7).

[0029] Preferably, a sealing cover (19) is detachably mounted on the rear end of the housing (1) in the embodiment of the utility model, and the discharge port (3) is disposed in the middle of the sealing cover (19).

[0030] like Figure 2As shown, the multi-stage filtering device (6) in the embodiment of the utility model comprises a fixed cylinder (601) and a plurality of stainless steel filter cartridges (602) of different diameters, wherein the stainless steel filter cartridge (602) is clamped inside the fixed cylinder (601), the plurality of stainless steel filter cartridges (602) are mutually sleeved, and the mesh density of the plurality of stainless steel filter cartridges (602) gradually increases from front to back; the upper end of the discharge pipeline (5) is connected to a liquid storage tank (11) via a branch pipeline (9) and a backwashing pump (10), the feed pipeline (4) and the discharge pipeline (5) are respectively installed with a solenoid valve (12), and the backwashing pump (10) and the solenoid valve (12) are both connected to a controller (13) via a connecting line.

[0031] like Figure 2 and Figure 3 As shown, the inner wall of the fixed cylinder (601) in the embodiment of the utility model is provided with a plurality of rows of annularly arranged limiting plates (16), and a plurality of clamping plates (17) are fixed to the edge of the stainless steel filter cylinder (602), and slots (18) are reserved between adjacent clamping plates (17). The limiting plates (16) of adjacent rows are arranged in a staggered manner, and the width of the slots (18) is greater than the width of the limiting plates (16).

[0032] like Figure 4 As shown, the sewage collecting tank (8) in the embodiment of the utility model is provided with a tank body (14) and a sewage discharge valve (15), wherein the sewage discharge valve (15) is connected to the lower end of the tank body (14), and the tank body (14) is a conical barrel structure.

[0033] The working principle of the utility model is as follows: when the utility model is in use, the raw material enters the shell 1 through the feed port 2, and after the deflection effect of the baffle 7, the raw material flows downward under the baffle 7, and some larger impurities in the raw material are deposited in the sewage collecting tank 8, and the rest of the raw material continues to flow forward, and the sewage valve 15 of the sewage collecting tank 8 is opened regularly to discharge the collected impurities. The raw material after preliminary separation enters the multi-stage filtering device 6, and is filtered step by step by multiple stainless steel filter cartridges 602 with different diameters to remove impurities. When the stainless steel filter cartridge 602 needs to be cleaned or replaced, the sealing cover 19 can be removed for easy cleaning and replacement. The filtered raw material flows into the discharge pipeline 5 from the discharge port 3 and enters the subsequent production process.

[0034] When backwashing is required, the controller 13 controls the two solenoid valves 12 to close the feed pipeline 4 and the discharge pipeline 5, opens the drain valve 15, starts the backwashing pump 10, and backwashes the liquid in the liquid storage tank 11 into the filter device for backwashing.

[0035] In summary, the filtration device for polyether polyol production provided by the embodiment of the utility model can achieve technical effects such as high-efficiency filtration, automatic backwashing, automatic sewage discharge, simple structure, easy cleaning and replacement. By combining components such as a multi-stage filtration device, a baffle, a sewage collection tank, a backwashing system and a controller, the problems of easy clogging or damage, overly complex structure, and difficulty in cleaning and replacement of traditional filtration devices are solved. At the same time, the filtration effect and production efficiency are improved, and the operating cost and maintenance difficulty are reduced.

[0036] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements should be included in the protection scope of the utility model.

Claims

1. A filtering device for producing polyether polyols, comprising a housing (1), wherein a feed port (2) and a discharge port (3) are respectively provided on both sides of the housing (1), wherein the feed port (2) and the discharge port (3) are respectively connected to a feed pipeline (4) and a discharge pipeline (5), wherein: A multi-stage filtering device (6) is installed inside the housing (1), the multi-stage filtering device (6) comprising a fixed cylinder (601) and a plurality of stainless steel filter cartridges (602) of different diameters, the stainless steel filter cartridges (602) being clamped inside the fixed cylinder (601), the plurality of stainless steel filter cartridges (602) being sleeved with each other, and the mesh density of the plurality of stainless steel filter cartridges (602) gradually increasing from front to back; A baffle (7) is installed inside the shell (1), the upper end of the baffle (7) is fixedly connected to the top of the shell (1), and the baffle (7) is located between the feed inlet (2) and the multi-stage filtering device (6); The lower end of the shell (1) is connected to a dirt collecting tank (8), and the dirt collecting tank (8) is located at the lower end of the baffle (7).

2. The filtration device for producing polyether polyols according to claim 1, characterized in that: The upper end of the discharge pipeline (5) is connected to a liquid storage tank (11) via a branch pipeline (9) and a backwash pump (10); the feed pipeline (4) and the discharge pipeline (5) are respectively provided with a solenoid valve (12); and the backwash pump (10) and the solenoid valve (12) are both connected to a controller (13) via a connecting line.

3. The filtration device for producing polyether polyols according to claim 1, characterized in that: The sewage collecting tank (8) is provided with a tank body (14) and a sewage discharge valve (15); the sewage discharge valve (15) is connected to the lower end of the tank body (14); and the tank body (14) is a conical barrel structure.

4. The filtration device for producing polyether polyols according to claim 1, characterized in that: The inner wall of the fixed cylinder (601) is provided with a plurality of circularly arranged limiting plates (16), and a plurality of clamping plates (17) are fixed to the edge of the stainless steel filter cylinder (602), with slots (18) reserved between adjacent clamping plates (17).

5. The filtration device for producing polyether polyols according to claim 4, characterized in that: Adjacent rows of limiting plates (16) are arranged in a staggered manner, and the width of the slots (18) is greater than the width of the limiting plates (16).

6. The filtration device for producing polyether polyols according to claim 1, characterized in that: A sealing cover (19) is detachably mounted on the rear end of the housing (1), and the discharge port (3) is disposed in the middle of the sealing cover (19).

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