Backflushing type cleaning filter system for polytetrahydrofuran device

Abstract

The utility model relates to the technical field of filtering systems, in particular to a backflushing type cleaning filter system for a polytetrahydrofuran device, which comprises a first filter and a second filter, the upper parts of the first filter and the second filter are connected with feeding pipes, and the lower parts of the first filter and the second filter are connected with discharging pipes; the tail ends of the two discharging pipes are connected to a polytetrahydrofuran storage tank; the top of the first filter and the top of the second filter are respectively connected with an air inlet pipe, the bottom of the first filter and the bottom of the second filter are respectively connected with an air outlet pipe, and the air outlet pipes are respectively connected with feed ports of the two filter press precoating tanks; products discharged by the filter can be collected into the precoating tank of the filter press to be reused, the operation is simple, the products are not discharged, safety and environmental protection hidden dangers caused by human factors are reduced, and the problem of product waste during discharging is solved.

Description

Technical Field

[0001] This utility model relates to the field of filtration system technology, and more specifically, to a backwash cleaning filter system for polytetrahydrofuran devices. Background Technology

[0002] Currently available systems for generating polytetrahydrofuran (PTF) require further impurity removal after the neutralization process using a high-temperature filter press. Existing technologies typically employ two sets of filters for impurity removal, one active and one standby. Switching between these filters wastes a significant amount of PTF, which oxidizes upon contact with oxygen. Therefore, the product discharged from the filters can only be recycled and cannot be directly utilized, resulting in waste. Furthermore, discharging PTF requires extensive manual labor, increasing safety and environmental risks. The time and labor-intensive process of switching between the two filter sets also necessitates a large workforce. Summary of the Invention

[0003] The purpose of this utility model is to provide a backwash cleaning filter system for polytetrahydrofuran devices, which can collect the filter discharge products into the pre-coating tank of the filter press for reuse. It is simple to operate, does not discharge products externally, reduces safety and environmental hazards caused by human factors, and solves the problem of product waste during discharge.

[0004] The embodiments of this utility model are achieved through the following technical solutions:

[0005] A backwash cleaning filter system for a polytetrahydrofuran device includes a first filter and a second filter.

[0006] The first filter and the second filter are both connected to an inlet pipe at the top and an outlet pipe at the bottom, and the ends of the two outlet pipes are both connected to a polytetrahydrofuran storage tank.

[0007] The first filter and the second filter are each connected to an air inlet pipe at the top and an air outlet pipe at the bottom. The air outlet pipes are respectively connected to the feed inlets of the two filter press pre-coating tanks.

[0008] Furthermore, pressure gauges are connected to both the first and second filters, and an air inlet pipe is provided on one side of the pressure gauge, with an air inlet control valve provided on the air inlet pipe.

[0009] Furthermore, both the first filter and the air outlet pipe connected to the bottom of the second filter are equipped with an air outlet control valve.

[0010] Furthermore, both feed pipes are equipped with feed control valves.

[0011] Furthermore, both discharge pipes are equipped with discharge control valves.

[0012] Furthermore, pressure gauges are connected to both of the filter press pre-coating tanks, and pressure gauge valves are installed on one side of each pressure gauge.

[0013] Furthermore, the ends of the two exhaust pipes are connected in series and converge into a main exhaust pipe.

[0014] Furthermore, two outlet branch pipes are connected to the main outlet pipe, and the two outlet branch pipes are respectively connected to the two filter press pre-coating tanks.

[0015] Furthermore, a branch pipe control valve is provided on the outlet branch pipe.

[0016] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0017] In use, this invention involves adding a pipeline (i.e., an air outlet pipe) to the bottom of each of the two filters, connecting it to the feed pipelines of the two filter press pre-coating tanks. Nitrogen is then connected to the top of the two filters via a metal air inlet pipe. This allows nitrogen to be blown into the filters through the air inlet pipe, thereby using the nitrogen to purge the product from the filters into the two filter press pre-coating tanks, enabling product reuse without affecting the normal operation of the filters. Furthermore, the operation is simple, the product is not discharged externally, reducing safety and environmental hazards caused by human factors and solving the problem of product waste during discharge. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart of the backwash cleaning filter system for the polytetrahydrofuran device provided in Embodiment 1 of this utility model;

[0020] Icons: 1-Pressure gauge, 2-Inlet control valve, 3-Inlet pipe, 4-First filter, 5-Feed pipe, 6-Outlet pipe, 7-Inlet pipe, 8-Outlet pipe, 9-Second filter, 10-Filter press pre-coating tank, 11-Polytetrahydrofuran storage tank, 12-Outlet control valve, 13-Feed control valve, 14-Outlet control valve, 15-Outlet main pipe, 16-Outlet branch pipe, 17-Branch pipe control valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0022] The following is a detailed description of a backwash cleaning filter system for a polytetrahydrofuran device provided by an embodiment of this utility model.

[0023] Example 1

[0024] A backwash cleaning filter system for a polytetrahydrofuran device includes a first filter 4 and a second filter 9.

[0025] The first filter 4 and the second filter 9 are both connected to the upper part of the feed pipe 5 and the lower part of the discharge pipe 6. The ends of the two discharge pipes 6 are both connected to the polytetrahydrofuran storage tank 11.

[0026] The top of the first filter 4 and the second filter 9 are each connected to an air inlet pipe 73, and the bottom of the first filter 4 and the second filter 9 are each connected to an air outlet pipe 8. The air outlet pipe 8 is connected to the feed inlet of the two filter press pre-coating tanks 10 respectively.

[0027] In use, this invention involves adding a pipeline (i.e., an outlet pipe 8) to the bottom of each of the two filters, connecting it to the feed pipes 5 of the two filter press pre-coating tanks 10. Nitrogen is then connected to the top of the two filters via a metal inlet pipe 73. This allows nitrogen to be blown into the filters through the inlet pipe 73, thereby using the nitrogen to purge the product from the filters into the two filter press pre-coating tanks 10, enabling product reuse without affecting the normal use of the filters. Furthermore, the operation is simple, the product is not discharged externally, reducing safety and environmental hazards caused by human factors and solving the problem of product waste during discharge.

[0028] Furthermore, the filter can be reused without needing to clean the filter element after each switch, as nitrogen purging can remove any residual product from the filter element.

[0029] In this embodiment, pressure gauges 1 are connected to both the first filter 4 and the second filter 9. An air inlet pipe 73 is provided on one side of the pressure gauge 1, and an air inlet control valve 2 is provided on the air inlet pipe 73. This facilitates the control of the amount of nitrogen entering the system, so as to avoid affecting the safety of use and the purging effect on the product due to excessive or insufficient air intake.

[0030] Meanwhile, pressure gauges 1 are connected to both of the filter press pre-coating tanks 10. A pressure gauge valve is installed on one side of each pressure gauge 1. During use, it is necessary to control and observe the pressure inside the filter press pre-coating tank 10 to prevent the system from over-pressurizing and affecting the safety of use.

[0031] In this embodiment, an air outlet control valve 12 is provided on the air outlet pipe 8 connected to the bottom of the first filter 4 and the second filter 9. This makes it convenient to close the air inlet control valve 2 and the air outlet control valve 12 at the top of the first filter 4 and the second filter 9 in time when the first filter 4 and the second filter 9 are not in use, so that the filtration function of the first filter 4 and the second filter 9 is in standby mode.

[0032] In this embodiment, each of the two feed pipes 5 is equipped with a feed control valve 13, and each of the two discharge pipes 6 is equipped with a discharge control valve 14; thereby, the feeding and discharging of the feed pipes 5 and the discharge pipes 6 can be better controlled, and the processing and production of polytetrahydrofuran can be better realized.

[0033] In this embodiment, the ends of the two air outlet pipes 8 are connected in series and converge into a main air outlet pipe 15, which facilitates the centralized collection of products in the first filter 4 and the second filter 9, and the collected products are sent to any one or more filter press pre-coating tanks 10.

[0034] In this embodiment, two outlet branch pipes 16 are connected to the main outlet pipe 15, and the two outlet branch pipes 16 are respectively connected to the two filter press pre-coating tanks 10. The outlet branch pipes 16 are equipped with branch pipe control valves 17. This facilitates the control of the filter press pre-coating tank 10 to be entered, thereby facilitating the centralized delivery of the collected products to any one or more filter press pre-coating tanks 10.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A backflushing filter system for a polytetrahydrofuran plant, characterized by: The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank. The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank. The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

2. The backflushing filter system for polytetrahydrofuran apparatus according to claim 1, characterized by, The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

3. The backflushing filter system for polytetrahydrofuran plants according to claim 1, characterized in that, The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

4. The backflushing filter system for polytetrahydrofuran plants according to claim 1, characterized in that, The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

5. The backflushing filter system for polytetrahydrofuran plants according to claim 1, characterized in that, The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

6. The backflushing filter system for polytetrahydrofuran plants according to claim 1, characterized in that, The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

7. The backflushing filter system for polytetrahydrofuran plants according to claim 1, characterized in that, The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

8. The backflushing filter system for polytetrahydrofuran plants according to claim 7, characterized in that The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

9. The backflushing filter system for polytetrahydrofuran plants according to claim 8, characterized in that The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank. The first filter and the second filter are connected with a feeding pipe at the upper part and a discharging pipe at the lower part, and the two discharging pipes are connected to a polytetrahydrofuran storage tank.

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