Bottom filter tank capable of being quickly maintained

Abstract

The utility model provides a bottom filter tank capable of being quickly maintained, which relates to the technical field of industrial wastewater treatment and is provided with a tank body, a filter material layer and a pipe network layer are arranged at the bottom of the tank body, the filter material layer consists of a plurality of filter material modules capable of being independently disassembled and assembled, and each filter material module comprises a filter material net basket and a filter material filled in the filter material net basket; the pipe network layer is arranged below the filter material layer, and a pipe network for draining and backflushing is arranged in the pipe network layer. According to the bottom filter tank capable of being quickly maintained, the replacement cost of the filter material can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, and particularly relates to a bottom filter tank capable of being quickly repaired. Background Art

[0002] At present, the environment-friendly bottom filtration method is an efficient, stable, economical and environment-friendly method for treating blast furnace slag. The blast furnace slag flows into the granulation facility through the slag runner, and is broken, quenched and granulated by the high-speed water flow ejected by the granulator in the granulation facility and further soaked and quenched in the granulation tank. The quenched slag-water mixture flows into the working filter tank through the outlet device and the outlet valve, and the filtered slag flushing water passes through the filter pipe and is pumped to the cooling tower by the upper tower pump for cooling, and then enters the storage tank. The water in the storage tank is pumped to the front of the furnace by the slag flushing pump to continue the slag flushing cycle. The slag flushing pump regularly pumps the slag flushing water into the filter pipe of the filter tank to backwash the filter pipe and the filter layer.

[0003] The structure of the existing filter tank for treating blast furnace slag by the environment-friendly bottom filtration method is as Figure 1 shown. Under normal use conditions, according to the "Code for Design of Water Supply and Drainage in Iron and Steel Enterprises" GB_50721-2012: the guarantee rate of each water supply index should be above 90%; in addition, when the main water source is groundwater, the total hardness should not exceed 200 mg / L; combined with the use experience, it is most ideal to use demineralized water to extend the service life of the filter material, and the reasonable service life is expected to be 2-3 years. After treating blast furnace slag through the filter tank for a period of time, the water filtration capacity of the filter material 2 in the bottom filter tank decreases. After the filter material 2 is completely caked, it is necessary to stop slag flushing. First, use a crane to clean the slag layer 1 above the filter material 2 in the bottom filter tank, and then use an excavator to dig and break and other measures to replace the caked filter material 2. The process of cleaning the filter material is time-consuming and laborious, and even damages the drainage and backwashing pipe network 3, resulting in functional paralysis. According to on-site research, it generally takes 3-5 days to clean and replace all the filter materials in a single slag tank, and the economic losses caused by the blast furnace shutdown are difficult to recover.

[0004] In addition, some iron and steel enterprises also use concentrated brine for ironmaking slag flushing to reduce costs and increase the ability of the ironmaking unit to consume "waste water". If the bottom filter tank is used to consume the above-mentioned waste water in the factory area, it will cause worse circulating water quality and faster caking speed of the filter layer, seriously affecting the service life of the filter tank, further increasing the replacement of the filter material, and the economic impact on blast furnace production.

[0005] In view of this, the inventor, based on years of production design experience in this field and related fields, has designed a bottom filter tank capable of being quickly repaired through repeated tests, in order to solve the problems existing in the prior art. Content of the Utility Model

[0006] The purpose of the utility model is to provide a bottom filter tank capable of being quickly repaired, which can effectively reduce the cost of replacing the filter material.

[0007] To achieve the above object, the present utility model provides a bottom filter tank that can be quickly repaired. Among them, the bottom filter tank has a tank body, and a filter material layer is provided at the bottom of the tank body. The filter material layer is composed of a plurality of filter material modules that can be independently disassembled and assembled. Each filter material module includes a filter material basket and filter materials filled in the filter material basket.

[0008] For the bottom filter tank that can be quickly repaired as described above, among them, the filter material basket is prism-shaped, and a plurality of the filter material baskets are arranged in sequence in the horizontal plane to form the filter material layer.

[0009] For the bottom filter tank that can be quickly repaired as described above, among them, the filter material basket includes a support frame and a filter net.

[0010] For the bottom filter tank that can be quickly repaired as described above, among them, a lifting handle convenient for hoisting is provided at the top of the support frame.

[0011] For the bottom filter tank that can be quickly repaired as described above, among them, a water slag layer is further provided above the filter material layer.

[0012] For the bottom filter tank that can be quickly repaired as described above, among them, the bottom filter tank further includes a hoisting crane provided above the tank body.

[0013] For the bottom filter tank that can be quickly repaired as described above, among them, the hoisting crane includes a crane track, a crane body, and a hoisting mechanism. The crane track is arranged horizontally above the tank body, the crane body is arranged on the crane track and can reciprocate along the crane track, and the hoisting mechanism is arranged on the crane body and can move up and down.

[0014] For the bottom filter tank that can be quickly repaired as described above, among them, the hoisting crane further includes a slag grabbing mechanism, and the slag grabbing mechanism is arranged on the crane body.

[0015] For the bottom filter tank that can be quickly repaired as described above, among them, the bottom filter tank further includes a pipe network layer provided below the filter material layer, and pipe networks for drainage and backwashing are arranged in the pipe network layer.

[0016] For the bottom filter tank that can be quickly repaired as described above, among them, the pipe network layer further includes a support frame for supporting the filter material layer. A plurality of the filter material modules are placed on the support frame, and the pipe networks for drainage and backwashing are arranged below the support frame.

[0017] Compared with the prior art, the present utility model has the following characteristics and advantages:

[0018] The bottom filter tank capable of quick repair proposed by the present utility model has a filter media layer composed of multiple filter media modules that can be independently disassembled and assembled. Each filter media module can be individually disassembled and assembled, and the filter media within each filter media module can also be independently replaced. After the bottom filter tank has been in production for a period of time, production personnel can locally replace the filter media modules during production breaks, gradually realizing the renewal of the filter media layer, ensuring production while continuously and stably maintaining the filtering effect of the bottom filter tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present utility model in any way. Additionally, the shapes and proportional dimensions of the various components in the drawings are only schematic and are used to assist in understanding the present utility model, rather than specifically defining the shapes and proportional dimensions of the various components of the present utility model. Those skilled in the art can, under the teachings of the present utility model, select various possible shapes and proportional dimensions according to specific circumstances to implement the present utility model.

[0020] Figure 1 is a schematic structural diagram of a bottom filter tank in the prior art;

[0021] Figure 2 is a schematic structural diagram of the bottom filter tank proposed by the present utility model;

[0022] Figure 3 is a side view of the bottom filter tank in the present utility model;

[0023] Figure 4 is a top view of the bottom filter tank in the present utility model.

[0024] DESCRIPTION OF THE REFERENCE NUMERALS

[0025] 100, bottom filter tank; 10, tank body;

[0026] 20, filter media layer; 21, filter media module;

[0027] 211, filter media wire basket; 30, pipe network layer;

[0028] 31, pipe network; 32, support frame;

[0029] 40, slag layer; 50, hoisting crane;

[0030] 51, crane track; 52, crane body;

[0031] 53, hoisting mechanism; 54, slag grabbing mechanism.

[0032] 1, slag layer; 2, filter media;

[0033] 3, drainage and backwashing pipe network. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Combined with the accompanying drawings and the description of the specific embodiments of the present invention, the details of the present invention can be more clearly understood. However, the specific embodiments of the present invention described herein are only for the purpose of explaining the present invention and cannot be construed in any way as a limitation to the present invention. Under the teaching of the present invention, those skilled in the art can conceive any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention.

[0035] As Figures 2 to 4 shown, the present invention provides a bottom filter tank 100 that can be quickly repaired. The bottom filter tank has a tank body 10, and a filter material layer 20 and a pipe network layer 30 are provided at the bottom of the tank body 10. The filter material layer 20 is composed of a plurality of filter material modules 21 that can be independently disassembled and assembled. The filter material module 21 includes a filter material wire basket 211 and filter material (not shown in the figure) filled in the filter material wire basket 211.

[0036] For the bottom filter tank 100 that can be quickly repaired proposed by the present invention, its filter material layer 20 is composed of a plurality of filter material modules 21 that can be independently disassembled and assembled. Each filter material module 21 can be individually disassembled and assembled, and the filter material in each filter material module 21 can also be independently replaced. After the bottom filter tank has been in production for a period of time, production personnel can locally replace the filter material during the production gap, gradually realizing the renewal of the filter material layer, ensuring production while continuously and stably maintaining the filtering effect of the bottom filter tank 100.

[0037] In an optional embodiment of the present invention, the filter material wire basket 211 is prism-shaped, and a plurality of filter material wire baskets 211 are arranged in sequence in the horizontal plane to form the filter material layer 20.

[0038] Furthermore, two adjacent filter material wire baskets 211 are closely attached to each other to avoid excessive gaps between the two filter material modules 21, so that the liquid in the bottom filter tank 100 is filtered through the filter material, effectively ensuring the filtering effect of the filter material layer 20.

[0039] In an optional example of this embodiment, as Figure 4 shown, the filter material wire basket 211 is quadrangular prism-shaped, and the cross-section of the filter material wire basket 211 is square.

[0040] In an optional example of this embodiment, the filter material is cobblestone. After the cobblestones in the filter material wire basket 211 are replaced, the filter material module 21 can be reused, effectively saving the replacement cost.

[0041] In an optional example of this embodiment, the filter material wire basket 211 includes a support frame and a filter net, which can not only provide support for the filter material but also ensure that water flow can pass through smoothly.

[0042] In an alternative example, the filter media basket 211 is cube-shaped, with the support frame forming the edges of the cube and the filter net forming the faces of the cube.

[0043] Furthermore, a handle for easy lifting is provided at the top of the support frame to facilitate the hoisting and replacement of the filter media module 21.

[0044] In an alternative embodiment of the present utility model, a water slag layer 40 is further provided above the filter media layer 20. The water slag layer 40 is formed by rapidly cooling molten blast furnace slag in water, which filters the industrial wastewater in the bottom filter tank 100 for the first time.

[0045] In an alternative example of this embodiment, the bottom filter tank 100 further includes a hoisting crane 50 disposed above the tank body 10.

[0046] In an alternative example, the hoisting crane 50 includes a crane rail 51, a crane body 52, and a hoisting mechanism 53. The crane rail 51 is horizontally disposed above the tank body 10, the crane body 52 is disposed on the crane rail 51 and can reciprocate along the crane rail 51, and the hoisting mechanism 53 is disposed on the crane body 52 and can move up and down. When replacing the filter media module 21, the position of the crane body 52 on the crane rail 51 is controlled to be above the filter media module 21 that needs to be replaced. The filter media module 21 is lifted by the hoisting mechanism 53, and then the crane body 52 is controlled to move, moving the filter media module 21 out of the bottom filter tank 100 for replacement.

[0047] Furthermore, the hoisting crane 50 further includes a slag grabbing mechanism 54, which is also disposed on the crane body 52. The slag grabbing mechanism 54 is used for grabbing and cleaning the water slag layer 40. The slag grabbing mechanism 54 can adopt a structure well-known to those skilled in the art and will not be elaborated here.

[0048] In another alternative example, a maintenance electric hoist is disposed on the crane body 52 to realize multiple functions such as hoisting, slag grabbing, and maintenance.

[0049] In an alternative embodiment of the present utility model, the bottom filter tank 100 further includes a pipe network layer 30 disposed below the filter media layer 20, and a pipe network 31 for drainage and backwashing is disposed in the pipe network layer 30.

[0050] In an alternative example of this embodiment, the pipe network layer 30 further includes a support frame 32 for supporting the filter media layer 20. A plurality of filter media modules 21 are placed on the support frame 32, and the pipe network 31 for drainage and backwashing is disposed below the support frame 32.

[0051] Please refer to Figures 2 to 4 , and the specific implementation manner of the bottom filter tank 100 that can be quickly repaired proposed by the present utility model will be described in detail in combination with an embodiment.

[0052] Use the bottom filter tank 100 to filter the blast furnace slag. When the filtering effect is poor or after a certain period of time, gradually update the filter media modules 21 in the filter media layer 20 in batches. It is recommended to replace them at least once every six months.

[0053] Lift the filter media module 21, which is carried out after the slag grabbing is completed. The water slag layer 40 in the tank body 10 is basically grabbed clean. Clean the water slag around the filter media module 21 to be replaced, and use the lifting mechanism 53 of the lifting crane 50 (which can be a maintenance electric hoist) to lift it out of the bottom filter tank 100. Check whether there are sundries on the support frame 32 below the filter media module 21. If there are sundries, clean them up.

[0054] Install the new filter media module 21. Prepare the new filter media module 21 (including the filter media basket 211 and the filter media inside it) in advance, and use the lifting mechanism 53 to quickly install the filter media module 21 in place.

[0055] For the old filter media module 21, clean out the internal filter media, check whether there is any damage, and check whether there is serious rust or damage at the bottom of the filter media basket 211. If the equipment is intact, fill it with new cobblestone filter media as required for standby. If there are problems, repair the filter media basket 211.

[0056] The bottom filter tank 100 proposed by the present utility model, which can be quickly repaired, can realize the quick maintenance of the bottom filter tank 100, solves the problem of blast furnace shutdown caused by filter media replacement, strengthens the absorption capacity of the ironmaking unit for factory wastewater. The bottom filter tank 100 can absorb most of the production wastewater in the factory area, and provides a feasible, reliable, economic and environmental protection solution for the zero discharge of wastewater in steel enterprises.

[0057] For the detailed explanations of the above embodiments, the purpose is only to explain the present utility model so as to better understand the present utility model. However, these descriptions cannot be interpreted as any limitation to the present utility model. In particular, the various features described in different embodiments can be arbitrarily combined with each other to form other embodiments. Unless there is a clear and opposite description, these features should be understood to be applicable to any one of the embodiments and not limited to the described embodiments only.

Claims

1. A bottom filter tank capable of rapid maintenance, characterized in that: The bottom filter tank has a tank body, a filter material layer is arranged at the bottom of the tank body, and the filter material layer is composed of a plurality of filter material modules that can be independently disassembled and assembled. Each of the filter material modules includes a filter material basket and filter material filled in the filter material basket.

2. The bottom filter tank capable of rapid maintenance according to claim 1, characterized in that: The filter material basket is prism-shaped, and a plurality of the filter material baskets are arranged in sequence in a horizontal plane to form the filter material layer.

3. The bottom filter tank capable of rapid maintenance as claimed in claim 2, characterized in that: The filter material basket comprises a supporting frame and a filter net.

4. The bottom filter tank capable of rapid maintenance as claimed in claim 3, characterized in that: A handle is provided on the top of the support frame for facilitating lifting.

5. The bottom filter tank capable of rapid maintenance according to claim 1, characterized in that: A water slag layer is also arranged above the filter material layer.

6. The bottom filter tank capable of rapid maintenance according to claim 1, characterized in that: The bottom filter tank also includes a hoisting crane arranged above the tank body.

7. The bottom filter tank capable of rapid maintenance according to claim 6, characterized in that: The hoisting trolley includes a trolley track, a trolley body and a hoisting mechanism. The trolley track is horizontally arranged above the pool body, the trolley body is arranged on the trolley track and can reciprocate along the trolley track, and the hoisting mechanism is arranged on the trolley body and can move up and down.

8. The bottom filter tank capable of rapid maintenance according to claim 7, characterized in that: The hoisting crane also includes a slag grabbing mechanism, and the slag grabbing mechanism is arranged on the crane body.

9. The bottom filter tank capable of rapid maintenance according to claim 1, characterized in that: The bottom filter tank also includes a pipe network layer arranged below the filter material layer, and a pipe network for drainage and backwashing is arranged in the pipe network layer.

10. The bottom filter tank capable of rapid maintenance according to claim 9, characterized in that: The pipe network layer also includes a support frame for supporting the filter material layer, a plurality of filter material modules are placed on the support frame, and the pipe network for drainage and backwashing is arranged below the support frame.

Images