Pickling waste liquid filtering and recycling device

Abstract

The utility model relates to the technical field of acid pickling waste liquid filtering and recycling, and particularly discloses an acid pickling waste liquid filtering and recycling device. Comprising a filter box, a plurality of filter assemblies which are detachably connected to the top of the filter box and are stacked up and down, a connector arranged outside the filter box, a reaction box connected with the connector and used for neutralization reaction, and a liquid inlet assembly arranged at the top of the reaction box and used for feeding pickling waste liquid, according to the device disclosed by the invention, the problem that the liquid passing rate is suddenly reduced in a certain time period due to precipitation and accumulation of a filter screen in a traditional pickling waste liquid filtering device is solved.

Description

Technical Field

[0001] The present application relates to the technical field of filtration and recovery of pickling waste liquid, and specifically discloses a device for filtration and recovery of pickling waste liquid. Background Art

[0002] Pickling wastewater is wastewater containing acidic substances and heavy metal ions generated during the production of metal products. Its pH value is usually lower than 1.5, which is highly acidic.

[0003] In industrial production, especially in the steel, metallurgy, and electroplating industries, acidic solutions such as sulfuric acid, nitric acid, and hydrochloric acid are often used to remove oxides and other contaminants from metal surfaces. This process is called pickling. As pickling proceeds, the acid gradually consumes and accumulates a large amount of metal ions, such as iron, copper, and nickel, forming the so-called pickling waste liquid. If these waste liquids are discharged directly without treatment, they will cause serious pollution to the environment. Therefore, effective treatment methods are needed to ensure that they meet emission standards.

[0004] Common methods for treating pickling wastewater include neutralization, redox, dialysis, ion exchange, and biological methods. Among them, neutralization is the most basic and commonly used method. By adding alkaline substances such as lime or dolomite to the pickling wastewater, a neutralization reaction occurs with the acidic components, thereby reducing the acidity of the wastewater and making its pH value neutral or near neutral.

[0005] Then the recovery of pickling waste liquid is completed;

[0006] In this process: the neutralization method will produce precipitation. If the pickling waste liquid needs to be collected, the precipitation needs to be eliminated. Usually, a filter is used to filter the precipitation, but there are certain problems with the filter: the precipitation will cause liquid blockage, that is, the liquid passage rate will drop sharply in a certain period of time. Secondly, it is very dangerous to manually clean the filter because of the acid-base neutralization reaction. When the acid is excessive, the entire waste liquid is still acidic, and manual operation is dangerous. For this reason, the inventor has proposed a pickling waste liquid filtering and recovery device. Utility Model Content

[0007] The utility model aims to solve the problem that the filter screen in the traditional pickling waste liquid filtering device causes a sudden drop in the liquid passing rate in a certain period of time due to sedimentation accumulation.

[0008] In order to achieve the above objectives, the present invention provides the following basic solutions:

[0009] Pickling waste liquid filtration and recovery device,

[0010] The principles and effects of this basic solution are:

[0011] 1. Compared with the prior art, the present device has a simple structure and an ingenious design. The present device is provided with a plurality of filter components, which adopt detachable and connected filter components. Moreover, the plurality of filter components are arranged in an overlapping manner. After the filter component located on the upper side is precipitated and accumulated, it is directly taken out and no longer used, and the filter component located on the upper side continues to filter. The advantage of this approach is that it solves the problem that the filter screen in the traditional pickling waste liquid filtering device suffers from a sudden drop in liquid pass rate due to precipitation accumulation in a certain period of time. Moreover, compared with the traditional technology of cleaning the filter component, the filtering effect of the filter component in the present device can be maintained at the best. Although the traditional technology of cleaning the filter component will not cause a sudden drop in the filtering effect, it cannot keep the filtering effect at the best.

[0012] 2. Compared with the existing technology, this device is equipped with a deceleration component to slow down the speed of waste liquid entering and avoid physical harm caused by waste liquid splashing.

[0013] 3. Compared with the prior art, this device is provided with a reaction box. This device still uses a neutralization reaction and acid-base neutralization. For chemical reactions, there is a problem of reaction efficiency. Therefore, this device is provided with a reaction box, which can speed up the efficiency of the neutralization reaction.

[0014] 4. Compared with the existing technology, this device is not only equipped with a reaction box, but also with a Ph value detector on the reaction box. An electric-controlled switch valve is set based on the Ph value detector. Only when the reaction liquid meets the appropriate Ph value can the electric-controlled switch valve be opened and the neutralization liquid can enter the filtration link. Such a setting can effectively avoid the problem of excessive acid and thus the Ph value is still very high. Such a setting will make the filtration recovery of the entire device safer and more reliable.

[0015] Furthermore, the filter assembly includes an inner layer and an outer layer, the inner layer is a filter screen, the outer layer is an elastic layer, a number of hooks are evenly fixed around the outer periphery of the elastic layer, and a ring groove is opened on the side of the top of the filter box close to the filter assembly, and the hooks hook the ring groove.

[0016] Furthermore, a liquid outlet pipe is provided at the bottom of the filter box, a switch valve is provided on the liquid outlet pipe, and a plurality of support rods are provided on the same side of the filter box as the liquid outlet pipe, and the free ends of the support rods are fixed with rubber anti-slip pads.

[0017] Furthermore, the reaction box includes a box body fixedly connected to the connector, a feeding pipe and a Ph value detector respectively arranged on both sides of the box body, and an electrically controlled valve arranged at the bottom of the box body and electrically connected to the Ph value detector. The box body is provided with an acceleration component for accelerating the neutralization reaction.

[0018] Furthermore, the acceleration assembly includes a connecting plate arranged on the top of the box body, connecting rods arranged on both sides of the connecting plate and fixed to the inner wall of the box body, a motor arranged on the connecting plate, a rotating rod coaxially connected to the motor output shaft and arranged inside the box body, and stirring rods arranged on both sides of the rotating rod, and a waste liquid passage port is formed between the connecting plate and the inner wall of the box body.

[0019] Furthermore, it also includes a heating component, which is an electric heating resistance wire group. The electric heating resistance wire group is arranged on the inner wall of the box, and the outside of the electric heating resistance wire group is wrapped with a coating that is resistant to acid and alkali corrosion.

[0020] Furthermore, the liquid inlet assembly is connected to the waste liquid through port, and the liquid inlet assembly includes a connecting channel detachably connected to the top of the box body on the same side as the waste liquid through port, and a flow area arranged in the connecting channel and matching the waste liquid through port, and the deceleration assembly is arranged in the flow area.

[0021] Furthermore, the deceleration assembly is composed of a plurality of inclined plates, wherein a portion of the inclined plates is arranged on the left side of the flow area, and another portion of the inclined plates is arranged on the right side of the flow area. The inclined plates located in the flow area are inclined and staggered.

[0022] Furthermore, an end cover for protecting the motor is provided at the end of the connecting channel away from the reaction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 The structure diagram of the pickling waste liquid filtration and recovery device proposed in the embodiment of the present application is shown;

[0025] Figure 2 A front view of the pickling waste liquid filtering and recovery device proposed in an embodiment of the present application is shown;

[0026] Figure 3 A schematic structural diagram of a filter assembly in a pickling waste liquid filtration and recovery device proposed in an embodiment of the present application is shown;

[0027] Figure 4 A schematic diagram of the internal structure of a reaction box in the pickling waste liquid filtration and recovery device proposed in an embodiment of the present application is shown;

[0028] Figure 5 A schematic diagram of the installation position of the retarder component in the pickling waste liquid filtration and recovery device proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0030] The figure marks in the drawings of the specification include: filter box 1, liquid outlet pipe 2, switch valve 3, support rod 4, connector 5, filter assembly 6, hook 601, elastic layer 602, filter screen 603, box body 7, waste liquid through port 8, motor 9, connecting channel 10, end cover 11, flow area 12, mounting block 13, connecting screw 14, electric control valve 15, connecting rod 16, connecting plate 17, feeding pipe 18, Ph value detector 19, rotating rod 20, stirring rod 21, electric heating resistance wire group 22, tilting plate 23.

[0031] Implementation example Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown:

[0032] The pickling waste liquid filtering and recovery device includes a filter box 1, a plurality of filter components 6 stacked up and down and detachably connected to the top of the filter box 1, a connector 5 arranged outside the filter box 1, a reaction box for neutralization reaction connected to the connector 5, and a liquid inlet component arranged on the top of the reaction box for the pickling waste liquid to enter, wherein a retarding component for retarding the pickling waste liquid is provided in the liquid inlet component.

[0033] About filter box 1:

[0034] The filter assembly 6 includes an inner layer and an outer layer, the inner layer is a filter screen 603, the outer layer is an elastic layer 602, and a number of hooks 601 are evenly fixed around the outer periphery of the elastic layer 602. A ring groove is opened on the side of the top of the filter box 1 close to the filter assembly 6, and the hooks 601 hook the ring groove.

[0035] Specifically: as the sediment will accumulate on the filter screen 603, the weight of the filter screen 603 increases, the elastic layer 602 is stretched downward, and then the elastic layer 602 expands. When the sediment filtering of the uppermost filter component 6 reaches its limit, a binding rope is used to bind the elastic layer 602 to lock the sediment on the filter screen 603, and then the hook 601 is removed. Since the hooks 601 in all filter components 6 are on the annular groove, after removing the top hook 601, the next filter screen 603 is used. This solves the problem that the filter screen 603 in the traditional pickling waste liquid filtration device accumulates sediment, which causes the liquid pass rate to drop sharply in a certain period of time.

[0036] It also solves the problem that the conventional technology of cleaning the filter assembly 6 does not cause a sudden drop in the filtering effect, but cannot maintain the best filtering effect.

[0037] Structurally:

[0038] A liquid outlet pipe 2 is provided at the bottom of the filter box 1, and a switch valve 3 is provided on the liquid outlet pipe 2. The filter box 1 is provided with a plurality of support rods 4 on the same side of the liquid outlet pipe 2, and the free ends of the support rods 4 are fixed with rubber anti-slip pads.

[0039] A switch valve 3 is provided. After the solid-liquid separation, a large amount of liquid is generated, and then the switch valve 3 is opened to uniformly recover the liquid.

[0040] About the reaction box:

[0041] The reaction box includes a box body 7 fixedly connected to the connector 5, a feeding pipe 18 and a Ph value detector 19 respectively arranged on both sides of the box body 7, and an electric control valve 15 arranged at the bottom of the box body 7 and electrically connected to the Ph value detector 19. The box body 7 is provided with an acceleration component for accelerating the neutralization reaction, and the feeding pipe 18 is fed with alkaline material for neutralization.

[0042] Specifically, a controller is required to receive the threshold value set by the Ph value detector 19, and then the controller sends an instruction to the electric control valve 15, so that the electric control valve 15 receives the instruction and opens the electric control valve 15, so that the liquid flows to the filter box 1;

[0043] Since the waste liquid treatment in this case still adopts the traditional neutralization reaction, which is a conventional chemical reaction, there is a reaction rate issue that must be considered in chemical reactions. Therefore, an acceleration component is set up;

[0044] The acceleration assembly includes a connecting plate 17 arranged on the top of the box body 7, connecting rods 16 arranged on both sides of the connecting plate 17 and fixed to the inner wall of the box body 7, a motor 9 arranged on the connecting plate 17, a rotating rod 20 coaxially connected to the output shaft of the motor 9 and arranged inside the box body 7, and stirring rods 21 arranged on both sides of the rotating rod 20. A waste liquid passage 8 is formed between the connecting plate 17 and the inner wall of the box body 7.

[0045] It also includes a heating component, which is an electric heating resistance wire group 22. The electric heating resistance wire group 22 is arranged on the inner wall of the box body 7, and the outside of the electric heating resistance wire group 22 is wrapped with a coating that is resistant to acid and alkali corrosion.

[0046] Specifically: the motor 9 drives the stirring rod 21 to accelerate the neutralization reaction by stirring, thereby increasing the reaction rate of the neutralization reaction;

[0047] Specifically: a heating component is provided to set a suitable reaction stability, accelerate the neutralization reaction by a suitable temperature, and improve the reaction rate of the neutralization reaction;

[0048] like Figure 1 As shown:

[0049] The liquid inlet assembly is connected to the waste liquid through port 8. The liquid inlet assembly includes a connecting channel 10 detachably connected to the top of the box body 7 on the same side as the waste liquid through port 8, and a flow area 12 arranged in the connecting channel 10 and matching the waste liquid through port 8. The deceleration assembly is arranged in the flow area 12.

[0050] Specifically:

[0051] The waste liquid through port 8 is a ring groove, and the connecting channel 10 is a double-tube structure matching the ring groove. The flow area is between the double-tube structures. A mounting block 13 is provided at the bottom of the connecting channel 10. The mounting block 13 is used to install the connecting channel on the waste liquid through port 8. The mounting block 13 is provided with connecting screws 14, and the installation is completed using the connecting screws 14.

[0052] Furthermore, the deceleration component is arranged at the flow position. Regarding the deceleration component:

[0053] like Figure 5 As shown, the deceleration assembly is composed of several inclined plates 23, wherein a part of the inclined plates 23 is arranged on the left side of the flow area 12, and another part of the inclined plates 23 is arranged on the right side of the flow area 12. The inclined plates 23 located in the flow area 12 are inclined and staggered.

[0054] The inclined plates 23 are tilted and staggered to slow down the downward flow of waste liquid, thereby avoiding the accidental splashing of liquid.

[0055] An end cover 11 for protecting the motor 9 is provided at the end of the connecting channel away from the reaction box. Since the connecting channel is a double-cylinder structure matching the ring groove, in order to rationally utilize the top space of the connecting channel, the end cover 11 is provided. After the end cover 11 is connected to the connecting channel, a cavity is formed, and this cavity is used to protect the motor 9.

[0056] The device solves the problem that the filter screen 603 in the traditional pickling waste liquid filtering device causes a sudden drop in the liquid passing rate during a certain period of time due to sedimentation accumulation.

[0057] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Pickling waste liquid filtration and recovery device, characterized by: It includes a filter box, several filter components stacked up and down and detachably connected to the top of the filter box, a connector arranged outside the filter box, a reaction box for neutralization reaction connected to the connector, and a liquid inlet component arranged on the top of the reaction box for pickling waste liquid to enter, and a retarding component for retarding the pickling waste liquid is provided in the liquid inlet component.

2. The pickling waste liquid filtering and recovery device according to claim 1, characterized in that: The filter assembly includes an inner layer and an outer layer, the inner layer is a filter screen, the outer layer is an elastic layer, a plurality of hooks are evenly fixed around the outer periphery of the elastic layer, and a ring groove is opened on the side of the top of the filter box close to the filter assembly, and the hooks are hooked into the ring groove.

3. The pickling waste liquid filtering and recovery device according to claim 2, characterized in that: A liquid outlet pipe is provided at the bottom of the filter box, a switch valve is provided on the liquid outlet pipe, and a plurality of support rods are provided on the same side of the filter box as the liquid outlet pipe, and the free ends of the support rods are fixed with rubber anti-slip pads.

4. The pickling waste liquid filtering and recovery device according to claim 2, characterized in that: The reaction box includes a box body fixedly connected to the connector, a feeding pipe and a Ph value detector respectively arranged on both sides of the box body, and an electric control valve arranged at the bottom of the box body and electrically connected to the Ph value detector. The box body is provided with an acceleration component for accelerating the neutralization reaction.

5. The pickling waste liquid filtering and recovery device according to claim 4, characterized in that: The acceleration assembly includes a connecting plate arranged on the top of the box body, connecting rods arranged on both sides of the connecting plate and fixed to the inner wall of the box body, a motor arranged on the connecting plate, a rotating rod coaxially connected to the motor output shaft and arranged inside the box body, and stirring rods arranged on both sides of the rotating rod, and a waste liquid passage port is formed between the connecting plate and the inner wall of the box body.

6. The pickling waste liquid filtering and recovery device according to claim 5, characterized in that: It also includes a heating component, which is an electric heating resistance wire group. The electric heating resistance wire group is arranged on the inner wall of the box body, and the outside of the electric heating resistance wire group is wrapped with a coating that is resistant to acid and alkali corrosion.

7. The pickling waste liquid filtering and recovery device according to claim 5, characterized in that: The liquid inlet assembly is connected to the waste liquid through port, and the liquid inlet assembly includes a connecting channel detachably connected to the top of the box body on the same side as the waste liquid through port, and a flow area arranged in the connecting channel and matching the waste liquid through port, and the deceleration assembly is arranged in the flow area.

8. The pickling waste liquid filtering and recovery device according to claim 7, characterized in that: The deceleration component is composed of a plurality of inclined plates, wherein a part of the inclined plates is arranged on the left side of the flow area, and another part of the inclined plates is arranged on the right side of the flow area. The inclined plates located in the flow area are inclined and staggered.

9. The pickling waste liquid filtering and recovery device according to claim 7, characterized in that: An end cover for protecting the motor is provided at the end of the connecting channel away from the reaction box.

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