A crude benzol filtering device

Abstract

The utility model discloses a crude benzene filtering device belongs to chemical equipment technical field, and the device includes jar body, filter core and filter box. Its key lies in setting up self -cleaning and recovery system, and this system includes: the cooperation of annular shower head of filter core, and it is connected with water tank through first water pump, is used for washing filter core, separator, and it is communicated with filter box through feed pipe, is used for separating and cleaning waste liquid, water pump is used for pumping the benzene separated by separator to output end recovery through reflux pipe, second water pipe is used for sending separated water back to water tank. The utility model discloses a structure above, realized the on -line self -cleaning of filter core, avoided shutdown dismounting, improved production efficiency significantly, recovered crude benzene in cleaning waste liquid simultaneously, reduced material loss, and reduced waste water discharge through circulating water, has good economic benefit and environmental protection benefit.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a crude benzene filtration device. Background Technology

[0002] Crude benzene, an important product of the coal chemical industry, inevitably contains mechanical impurities, tar particles, and polymers during its production. The presence of these impurities can affect the stable operation of subsequent refining processes and product quality. Therefore, crude benzene must be effectively filtered and purified before entering the refining unit.

[0003] Currently, the most common filtration method is using filtration equipment with built-in filter cartridges. When the crude benzene to be treated flows through the filter cartridge, impurities are trapped on the surface of the cartridge, thus achieving solid-liquid separation. However, as the filtration process continues, the impurities trapped on the surface of the filter cartridge accumulate, causing the filtration channels to gradually become clogged, resulting in an increase in filtration pressure differential and a decrease in processing capacity. When the pressure differential reaches the set upper limit, the filter cartridge must be cleaned or replaced.

[0004] Traditional methods typically require shutting down the entire filtration unit, depressurizing and evacuating the equipment, and then manually reopening it to remove the contaminated filter cartridges for offline cleaning or replacement. This process not only disrupts continuous production and significantly reduces efficiency, but also poses a significant risk of toxic and volatile benzene vapor leakage during the disassembly and handling of filter cartridges filled with crude benzene residue. This poses a threat to the health of on-site operators and contaminates the work environment. Furthermore, the wastewater generated from cleaning the filter cartridges contains a high concentration of benzene, which would cause serious environmental problems if directly discharged. Treating it would require additional costs and complex procedures, while also resulting in the loss of valuable crude benzene material.

[0005] Therefore, this utility model proposes a coarse benzene filtration device to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing coarse benzene filtration devices, such as the need to stop the machine for disassembly and cleaning after the filter element becomes clogged, resulting in low production efficiency and easy material loss and environmental pollution during the cleaning process, this utility model aims to provide a coarse benzene filtration device with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a coarse benzene filtration device, comprising: a tank, an input end fixedly connected to the lower side wall of the tank, an output end fixedly connected to the top of the tank, a filter element disposed inside the tank, and a filter box fixed to the bottom of the tank; the device also includes a self-cleaning and recycling system.

[0008] The self-cleaning and recycling system includes a ring-shaped nozzle, a water tank, a first water pump, a first water pipe, a separator, a feed pipe, a water pump, a return pipe, and a second water pipe.

[0009] The annular nozzle is coaxially positioned above the filter element; the inlet of the first water pump is connected to the water tank, and the first water pipe is connected between the outlet of the first water pump and the annular nozzle, forming a cleaning fluid supply circuit; the feed pipe connects the filter box and the separator; the water pump is fixedly installed on the top of the separator, and the return pipe connects the outlet of the water pump and the output end, forming a benzene recovery conveying circuit; the second water pipe connects the separator and the water tank, forming a recycled water conveying circuit.

[0010] Preferably, a valve is fixedly installed on the feed pipe. By opening and closing the valve, the timing of the cleaning waste liquid entering the separator can be precisely controlled, so as to realize reliable switching between normal filtration mode and online cleaning mode.

[0011] Preferably, the top of the separator is provided with a benzene outlet connected to the inlet of the water pump, and the lower part of the side wall of the separator is provided with a water outlet connected to one end of the second water pipe. This structure utilizes the density difference between benzene and water to achieve effective stratified export of the upper benzene material and the lower wastewater.

[0012] Preferably, the input end is arranged along the tangential direction of the tank body. This tangential feeding structure causes the crude benzene entering the tank body to form a rotating flow field, which uses centrifugal force to promote the pre-settling of some large particulate impurities, thereby reducing the filtration load of the filter element.

[0013] Preferably, the bottom of the filter box is a downwardly sloping conical structure, and the feed pipe is connected to the lowest point of the filter box. This structure utilizes gravity to ensure that the settled impurities and waste liquid generated during cleaning can be collected and discharged completely without any dead angles.

[0014] Preferably, the filter element is a hollow cylindrical structure with a filter layer on its outer surface, and the annular nozzle is provided with multiple spray holes facing the outer surface of the filter element. This combination of structures ensures that the high-pressure water flow during cleaning can evenly and comprehensively cover and rinse the entire filter surface of the filter element.

[0015] Preferably, the other end of the return pipe merges into the output pipe, so that the recovered refined crude benzene can be directly combined with the product in the main pipeline, simplifying the recovery process and avoiding additional storage and transportation steps.

[0016] Preferably, the other end of the second water pipe is connected to the upper part of the water tank. This connection method allows the recovered water to flow back to the water tank smoothly, making it easy to observe the return status and providing a pathway for the recycling of cleaning water.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by setting up a self-cleaning system consisting of an annular nozzle, a water tank and a water pump, the filter element is backwashed online, which solves the problem in the prior art that the filter element needs to be stopped for disassembly and cleaning after clogging, resulting in production interruption and low efficiency. It achieves the technical effect of automatically cleaning the filter element without stopping the machine, significantly improving production efficiency and automation level.

[0018] 2. In this utility model, by setting up a separator with a built-in coalescing filter membrane and a water pump and return pipeline for conveying the recovered benzene, the crude benzene in the cleaning waste liquid is separated and sent back to the product output end, which solves the problem of loss of valuable crude benzene material caused by the cleaning process in the prior art, and achieves the technical effects of recovering materials, reducing production costs and improving product yield. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a coarse benzene filtration device proposed in this utility model; Figure 2 This is a schematic diagram of the structure of the first water pipe of a coarse benzene filtration device proposed in this utility model; Figure 3 This is a schematic diagram of the tank structure of a coarse benzene filtration device proposed in this utility model.

[0020] Legend: 1. Tank; 2. Input end; 3. Filter box; 4. Water tank; 5. Separator; 6. Return pipe; 7. First water pipe; 8. Output end; 9. Annular nozzle; 10. Filter element; 11. Second water pipe; 12. Feed pipe; 13. Coalescing membrane; 14. Water pump; 15. Valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Example: Please refer to Figures 1 to 3This utility model provides a coarse benzene filtration device, which aims to solve the problem that existing coarse benzene filtration devices require shutdown for disassembly and cleaning after the filter element becomes clogged, resulting in low production efficiency and easy material loss and environmental pollution.

[0023] like Figure 1 As shown, the crude benzene filtration device includes a tank 1 as the main structure, which is used to contain the crude benzene to be filtered. The lower side wall of the tank 1 is fixedly connected to an input end 2 for feeding, and the top of the tank 1 is fixedly connected to an output end 8 for discharging refined crude benzene. The input end 2 is arranged along the tangential direction of the tank 1. The filter element 10 is vertically fixed inside the tank 1. The filter element 10 is a hollow cylindrical structure with a filter layer on the outer surface, which is used to perform primary filtration on the crude benzene entering the tank 1. The filter box 3 is sealed and fixed to the bottom of the tank 1. The filter box 3 is used to collect the liquid and impurities after being filtered by the filter element 10. The bottom of the filter box 3 is a downwardly inclined conical structure to facilitate the centralized collection of impurities and waste liquid.

[0024] The coarse benzene filtration device also includes a self-cleaning and recycling system, which works in conjunction with the tank 1, filter box 3 and output end 8 to achieve online cleaning of filter element 10 and recycling of waste liquid. The self-cleaning and recycling system includes an annular nozzle 9, water tank 4, first water pump, first water pipe 7, separator 5, feed pipe 12, water pump 14, return pipe 6 and second water pipe 11.

[0025] In the self-cleaning and recycling system, the annular nozzle 9 is coaxially arranged above the filter element 10. The annular nozzle 9 has multiple spray holes facing the outer surface of the filter element 10 for uniformly spraying cleaning liquid. The water tank 4 is used to store cleaning water. The inlet of the first water pump is connected to the water tank 4 to provide power for the cleaning process. One end of the first water pipe 7 is connected to the outlet of the first water pump, and the other end is connected to the annular nozzle 9, forming a cleaning water delivery circuit.

[0026] Meanwhile, in the self-cleaning and recycling system, the feed pipe 12 is connected to the lowest point of the filter box 3 and the separator 5, and is used to pour the mixed waste liquid generated during cleaning into the separator 5. A valve 15 is fixedly installed on the feed pipe 12 to control the flow of the waste liquid. A coalescing filter membrane 13 is fixed inside the separator 5 to achieve effective separation of benzene and water. A water pump 14 is fixedly installed on the top of the separator 5 to pump out the separated refined crude benzene. One end of the return pipe 6 is connected to the outlet of the water pump 14, and the other end is connected to the output end 8 to collect the recovered crude benzene into the main product pipeline. The second water pipe 11 connects the separator 5 and the water tank 4 to return the separated water to the water tank 4 for recycling.

[0027] To solve the above-mentioned technical problems, the coarse benzene filtration device has a self-cleaning and recycling system that forms a specific structural fit and connection with the basic filtration structure, realizing the functions of online self-cleaning and material recycling.

[0028] Please refer to the following carefully. Figure 1 and Figure 3 The separator 5 is the core component for achieving secondary separation of benzene and water. The separator 5 has a coalescing filter membrane 13 fixed inside. The coalescing filter membrane 13 has oleophilic and hydrophobic properties. When the mixed waste liquid containing benzene and water flows through it, the tiny benzene droplets will coalesce into larger benzene droplets and float due to the density difference, while the water sinks to the bottom. The top of the separator 5 is provided with a benzene outlet connected to the inlet of the water pump 14 to discharge the floating refined crude benzene. The lower part of the side wall of the separator 5 is provided with a water outlet connected to one end of the second water pipe 11 to discharge the sinking wastewater.

[0029] The water pump 14 is fixedly installed on the top of the separator 5. The inlet of the water pump 14 is connected to the internal space of the separator 5 through the benzene outlet at the top of the separator 5. The outlet of the water pump 14 is connected to one end of the return pipe 6. The water pump 14 is used to provide the conveying power for the recovered refined crude benzene and pump it to the return pipe 6.

[0030] The return pipe 6 serves as a conveying channel for the recovered benzene. One end of it is connected to the outlet of the water pump 14, and the other end is connected to the output end 8 at the top of the device. Specifically, the other end of the return pipe 6 merges into the pipeline of the output end 8, so that the refined crude benzene recovered from the separator 5 can be combined with the crude benzene directly filtered from the tank 1 and discharged together from the output end 8.

[0031] The second water pipe 11 serves as a channel for transporting recycled water. One end of it is connected to the water outlet at the lower part of the side wall of the separator 5, and the other end is connected to the upper part of the water tank 4. It transports the water separated in the separator 5 back to the water tank 4. This structural arrangement ensures the recycling of cleaning water and reduces water consumption and wastewater discharge.

[0032] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, in order to achieve precise control over the working status of the self-cleaning and recycling system, a valve 15 is fixedly installed on the feed pipe 12 connecting the filter box 3 and the separator 5. The valve 15 can be an electric valve or a pneumatic valve, used to close under normal filtration conditions to prevent crude benzene from entering the separator 5, and to open under cleaning conditions to allow cleaning waste liquid to enter the separator 5.

[0033] As another preferred embodiment, in order to improve the pre-separation effect when crude benzene enters the tank 1 and reduce the direct impact on the bottom of the filter element 10, the input end 2 is set along the tangential direction of the tank 1. This tangential feeding method enables the crude benzene to form a rotating flow when entering the tank 1, and uses centrifugal force to make some larger particles of impurities settle down along the inner wall of the tank 1 into the filter box 3 at the bottom.

[0034] As another preferred embodiment, in order to improve the collection efficiency of impurities and waste liquid in the filter box 3, the bottom of the filter box 3 is designed as a downwardly inclined conical structure, and the feed pipe 12 connecting the separator 5 is connected to the lowest point of the conical structure. This structure ensures that under the action of gravity, both the settled impurities and the waste liquid generated during cleaning can be completely and without dead angles collected at the inlet of the feed pipe 12.

[0035] In another preferred embodiment, in order to achieve efficient and thorough cleaning of the outer surface of the filter element 10, the annular nozzle 9 is provided with multiple evenly distributed spray holes, and the spray direction of all the spray holes is towards the outer surface of the filter element 10. When the high-pressure cleaning water is sprayed out through the annular nozzle 9, it can form an annular high-pressure water curtain that evenly covers the entire circumference of the filter element 10, thereby effectively removing the attached impurities.

[0036] Working principle: Under normal filtration conditions, valve 15 is closed. The crude benzene to be filtered enters the tank 1 from the inlet 2 and flows from bottom to top in the tank 1, passing through the filter element 10. Mechanical impurities and colloids in the crude benzene are intercepted by the outer surface of the filter element 10. The filtered refined crude benzene is discharged from the top outlet 8. Some of the larger particles that settle due to centrifugal force during feeding fall into the bottom filter box 3.

[0037] When the filter element 10 needs to be cleaned online, the feed of crude benzene is stopped first, then the valve 15 is opened and the first water pump is started. The cleaning water in the water tank 4 is pressurized by the first water pump and then transported to the annular nozzle 9 through the first water pipe 7. The high-pressure water is sprayed out from the nozzle of the annular nozzle 9 to form a uniform water curtain that washes the outer surface of the filter element 10 in the opposite direction, peeling off the attached impurities. The peeled impurities, together with the cleaning water, fall into the filter box 3, forming a mixed waste liquid containing benzene and water.

[0038] The mixed waste liquid enters the separator 5 through the feed pipe 12 at the bottom of the filter box 3. Inside the separator 5, the mixed waste liquid flows through the coalescing filter membrane 13. The tiny benzene droplets in the water are coalesced into large benzene droplets and float to the top of the separator 5, while the water sinks to the bottom, thus achieving the separation of benzene and water.

[0039] Subsequently, the water pump 14 installed on top of the separator 5 is started, and the refined crude benzene separated from the upper layer is pumped to the output end 8 through the return pipe 6, where it merges with the main product pipeline, realizing the recovery of materials. At the same time, the wastewater in the lower layer flows back to the water tank 4 through the second water pipe 11 under the action of gravity or under the action of the auxiliary pump, for the next cleaning. Thus, a complete online self-cleaning and material recovery cycle is completed.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A coarse benzene filtration device, comprising: The tank (1) has an input end (2) fixedly connected to the lower side wall of the tank (1) and an output end (8) fixedly connected to the top of the tank (1). Filter element (10), the filter element (10) is vertically fixed inside the tank (1); Filter box (3), the filter box (3) is sealed and fixed to the bottom of the tank (1); The feature is that the coarse benzene filtration device further includes a self-cleaning and recycling system, the self-cleaning and recycling system comprising: An annular nozzle (9) is coaxially disposed above the filter element (10); Water tank (4); The first water pump, the inlet of the first water pump is connected to the water tank (4); The first water pipe (7) has one end connected to the outlet of the first water pump and the other end connected to the annular nozzle (9). Separator (5), wherein a coalescing filter membrane (13) is fixed inside the separator (5); Feed pipe (12), the feed pipe (12) is connected to the filter box (3) and the separator (5); A water pump (14) is fixedly installed on the top of the separator (5); Return pipe (6), one end of which is connected to the outlet of the water pump (14), and the other end is connected to the output end (8); The second water pipe (11) connects the separator (5) to the water tank (4).

2. The coarse benzene filtration device according to claim 1, characterized in that, A valve (15) is fixedly installed on the feed pipe (12).

3. The coarse benzene filtration device according to claim 1, characterized in that, The top of the separator (5) is provided with a benzene outlet connected to the inlet of the water pump (14), and the lower part of the side wall of the separator (5) is provided with a water outlet connected to one end of the second water pipe (11).

4. The coarse benzene filtration device according to claim 1, characterized in that, The input terminal (2) is arranged along the tangential direction of the tank body (1).

5. The coarse benzene filtration device according to claim 1, characterized in that, The bottom of the filter box (3) is a downwardly inclined conical structure, and the feed pipe (12) is connected to the lowest point of the filter box (3).

6. The coarse benzene filtration device according to claim 1, characterized in that, The filter element (10) is a hollow cylindrical structure with a filter layer on its outer surface, and the annular nozzle (9) is provided with a plurality of spray holes facing the outer surface of the filter element (10).

7. The coarse benzene filtration device according to claim 1, characterized in that, The other end of the return pipe (6) merges into the pipe of the output end (8).

8. The coarse benzene filtration device according to claim 1, characterized in that, The other end of the second water pipe (11) is connected to the upper part of the water tank (4).

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