CN113233567A

CN113233567A - Waste water pH adjusting device

Info

Publication number: CN113233567A
Application number: CN202110687899.9A
Authority: CN
Inventors: 刘品达; 胡美为; 李含驰; 陈茜; 周福伟
Original assignee: Kunshan Sanyi Environmental Protection Technology Co ltd
Current assignee: Kunshan Sanyi Environmental Protection Technology Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-08-10

Abstract

The invention provides a pH adjustment device for wastewater, comprising: a pH adjustment tank, which is provided with a feed pipe and a discharge pipe; a pipeline mixer, which is arranged outside the pH adjustment tank, and the first end is connected to the bottom of the pH adjustment tank through a first pipeline The second end is connected to the second pipeline and the second pipeline extends into the pH adjusting tank, and the pipeline mixer is also connected with an acid adding pipe and an alkali adding pipe. In the wastewater pH adjustment device provided by the invention, after the adjusted material liquid is sent into the pH adjustment tank through the feed pipe, it will enter the pipeline mixer through the first pipeline. In the pipeline mixer, the material liquid to be adjusted will be mixed with the acid or alkali liquid sent from the acid adding pipe or the alkali adding pipe in the first stage, and then sent back to the pH adjusting tank through the second pipeline to continue mixing. In this way, the material liquid to be adjusted and the acid liquid or alkali liquid will be initially mixed in the pipeline mixer and then enter the pH adjustment tank for remixing, thereby enhancing the mixing effect and improving the efficiency of pH adjustment. In addition, the structure of the present invention is simpler and the cost is lower.

Description

Waste water pH adjusting device

Technical Field

The invention relates to the field of wastewater treatment, in particular to a wastewater pH adjusting device.

Background

A large amount of wastewater is generated in the production process of lithium battery materials, the main components in the wastewater are sodium sulfate, sodium chloride, ammonium chloride and the like, and the wastewater often contains heavy metals such as nickel, cobalt, manganese and the like and a small amount of COD impurities. Generally, wastewater is treated by multi-effect evaporation or MVR evaporation. In order to avoid the influence of impurities and pH values in the wastewater on the evaporation and crystallization process, operations such as impurity removal, filtration and the like can be carried out at the front end of the evaporation process. In order to realize the operation, a method of increasing the pH value is often adopted to precipitate the heavy metal impurities so as to achieve the purpose of separation and removal, and the pH value needs to be adjusted back before entering an evaporation system so as to avoid the influence of overhigh pH value on the evaporation process.

At present, the pH adjusting technology often utilizes the mode that the solution is stirred by a motor driven stirring paddle while acid and alkali are added into a tank body, so that the mixing of the solution and the acid and the alkali is accelerated, and the pH value is adjusted. However, the mixing adjustment mode that the motor drives the stirring paddle is adopted, and the operation cost is increased due to the introduction of the moving equipment. The increase of connecting pieces such as moving equipment and blades also increases the processing cost and the maintenance cost of the equipment, and the mixing effect of stirring also influences the mixing effect due to the limitation of rotating speed and the like.

Disclosure of Invention

The invention provides a wastewater pH adjusting device, which is used for overcoming the defects of poor mixing effect and low efficiency in the prior art when a solution in a tank body is mixed with an acid-alkali solution, and realizing the effects of enhancing mixing capacity and improving pH adjusting efficiency.

The invention provides a wastewater pH adjusting device, comprising: the pH adjusting tank is provided with a feeding pipe and a discharging pipe; the pipeline mixer is arranged outside the pH adjusting tank, the first end of the pipeline mixer is connected with the bottom of the pH adjusting tank through a first pipeline, the second end of the pipeline mixer is connected with a second pipeline, the second pipeline extends into the pH adjusting tank, and the pipeline mixer is further connected with an acid adding pipe and an alkali adding pipe.

According to the wastewater pH adjusting device provided by the invention, the part of the second pipeline extending into the pH adjusting tank is provided with at least one Venturi ejector, wherein the bottom inlet of the Venturi ejector is connected with the second pipeline, and the side wall inlet and the top outlet are communicated with the inside of the pH adjusting tank.

The wastewater pH adjusting device provided by the invention further comprises a plurality of venturi ejectors, wherein the venturi ejectors are transversely spaced and arranged side by side with each other.

According to the wastewater pH adjusting device provided by the invention, the part of the second pipeline extending into the pH adjusting tank is constructed into an annular tubular structure or a polygonal tubular structure.

According to the wastewater pH adjusting device provided by the invention, the second pipeline extends into the pH adjusting tank from the top of the pH adjusting tank or extends into the pH adjusting tank from the side wall of the pH adjusting tank.

According to the wastewater pH adjusting device provided by the invention, the acid adding pipe is provided with the acid adding control pump, the alkali adding pipe is provided with the alkali adding control pump, and the pH adjusting tank is provided with the pH meter, wherein a probe of the pH meter extends into the pH adjusting tank, and the pH meter is arranged with the acid adding control pump and the alkali adding control pump in an interlocking manner.

According to the wastewater pH adjusting device provided by the invention, the side wall of the pH adjusting tank is provided with an overflow port, the discharge pipe is connected to the overflow port, the pH meter is arranged adjacent to the overflow port, and the probe of the pH meter is lower than the overflow port.

According to the wastewater pH adjusting device provided by the invention, the acid adding control pump and the alkali adding control pump are both configured into metering pumps capable of being controlled by frequency conversion.

According to the wastewater pH adjusting device provided by the invention, the part of the second pipeline, which is positioned outside the pH adjusting tank, is sequentially provided with the circulating pump and the pressure gauge.

According to the wastewater pH adjusting device provided by the invention, the pH adjusting tank is also connected with a tail gas discharge pipe, wherein the tail gas discharge pipe and the feeding pipe are both arranged at the top of the pH adjusting tank.

In the wastewater pH adjusting device provided by the invention, after the feed liquid to be adjusted is fed into the pH adjusting tank through the feed pipe, the feed liquid enters the pipeline mixer through the first pipeline. In the pipeline mixer, the feed liquid to be regulated is first mixed with the acid liquid or alkali liquid fed by the acid adding pipe or alkali adding pipe, and then is returned to the pH regulating tank via the second pipeline for further mixing. Through the mode, the feed liquid to be regulated and the acid liquid or the alkali liquid can be primarily mixed in the pipeline mixer and then enter the pH regulating tank for remixing, so that the mixing effect is enhanced, and the pH regulating efficiency is improved. The invention has simpler structure and lower cost.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a wastewater pH adjusting device provided by the present invention;

reference numerals:

100: a wastewater pH adjusting device; 102: a pH adjusting tank;

104: a pipeline mixer; 106: a feed pipe;

108: a discharge pipe; 110: a first pipeline;

112: a second pipeline; 114: adding an acid pipe;

116: adding an alkali tube; 118: a venturi ejector;

120: adding an acid control pump; 122: adding alkali to control the pump;

124: a pH meter; 126: a circulation pump;

128: a pressure gauge; 130: and a tail gas discharge pipe.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Referring now to fig. 1, an embodiment of the present invention will be described in detail. It should be understood that the following description is only exemplary embodiments of the present invention and does not constitute any particular limitation of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a wastewater pH adjusting apparatus 100. The wastewater pH adjustment apparatus 100 may generally include a pH adjustment tank 102 and a line mixer 104.

Specifically, the pH adjustment tank 102 may be provided with a feed pipe 106 and a discharge pipe 108. The feeding pipe 106 is used for feeding the feed liquid to be adjusted into the pH adjusting tank 102 for pH adjustment, and the adjusted feed liquid can be discharged from the pH adjusting tank 102 through the discharging pipe 108 for subsequent treatment.

Further, the line mixer 104 may be disposed outside the pH adjusting tank 102. The line mixer 104 has opposite first and second ends, and an acid addition line 114 and a base addition line 116 are connected to the line mixer 104. An acid adding pipe 114 and an alkali adding pipe 116 respectively introduce acid liquid and alkali liquid into the pipeline mixer 104 according to actual requirements.

Specifically, a first end of line mixer 104 is connected to the bottom of pH adjustment tank 102 via first line 110, such that feed liquid in pH adjustment tank 102 can enter line mixer 104 via first line 110 to mix with the acid or base liquid. On the other hand, the second end of the line mixer 104 is connected to the second pipe 112, and the free end of the second pipe 112 can be extended into the pH adjusting tank 102, so that the mixed feed liquid is fed into the pH adjusting tank 102 again.

During actual production, the feed liquid to be adjusted is fed into the pH adjusting tank 102 through the feed pipe 106, and then enters the pipeline mixer 104 through the first pipeline 110. In the line mixer 104, the feed liquid to be adjusted is first mixed with the acid liquid or alkali liquid fed from the acid adding pipe 114 or alkali adding pipe 116, and then fed back to the pH adjusting tank 102 through the second pipe 112 to be mixed continuously. In this way, the feed liquid to be adjusted and the acid liquid or the alkali liquid are primarily mixed in the pipeline mixer 104 and then enter the pH adjusting tank 102 for re-mixing, thereby enhancing the mixing effect and improving the pH adjusting efficiency. The invention has simpler structure and lower cost.

As further shown in fig. 1, in one embodiment of the present invention, the portion of second conduit 112 extending into pH adjustment tank 102 may be provided with at least one venturi ejector 118. For each venturi ejector 118, it has a bottom main inlet, a sidewall inlet, and a top outlet. Specifically, the bottom inlet of venturi ejector 118 may be connected to second conduit 112, while the sidewall inlet and the top outlet of venturi ejector 118 communicate with the interior of pH adjustment tank 102, respectively.

During actual production operations, the feed liquid after the first stage mixing via line mixer 104 will enter pH adjustment tank 102 via second line 112 and enter venturi jet 118 via the bottom main inlet. In the venturi ejector 118, the primary mixed feed liquid is secondarily mixed with the feed liquid in the pH adjusting tank 102 entering from the side wall inlet, and then discharged again into the pH adjusting tank 102 from the top outlet. In this way, the pH adjusting process has better mixing effect and higher mixing efficiency.

In one embodiment of the present invention, as shown in FIG. 1, a plurality of venturi ejectors 118 as described above may be disposed in the pH adjustment tank 102. When multiple venturi ejectors 118 are provided, the venturi ejectors 118 may be laterally spaced apart and arranged side-by-side with one another. In this way, the mixing effect is further increased and the mixing efficiency is improved. It should be understood, of course, that the number of venturi ejectors 118 is not limiting to the invention, and that any suitable number of venturi ejectors 118 may be provided in the pH adjustment tank 102, and the invention is not limited to the embodiment shown in fig. 1.

In contrast, in the embodiment of the present invention, the portion of the second pipe 112 extending into the pH adjustment tank 102, that is, the pipe portion connected to the venturi ejector 118, may be configured into an annular pipe structure or a polygonal pipe structure, for example, a square or a pentagon shape. In this way, a more uniform and regular arrangement of the venturi ejectors 118 is achieved. It will be appreciated that the particular shape of the conduit portions described above may be adapted and arranged according to actual requirements and that the invention is not limited to a particular form or forms.

Further, with respect to the second line 112, the second line 112 may extend into the pH adjustment tank 102 from the top of the pH adjustment tank 102, for example, as shown in fig. 1. In other alternative embodiments, the second pipe 112 may extend into the pH adjusting tank 102 from other positions, such as from the side wall of the pH adjusting tank 102. In other words, the position of the second pipe 112 extending into the pH adjusting tank 102 can be adjusted according to the actual situation. Similarly, a second line 112 may extend into the pH adjustment tank 102 from a different height of the pH adjustment tank 102.

With continued reference to fig. 1, in an embodiment of the present invention, in order to adjust the pH, i.e., to control the amount of acid or base solution added, an acid addition control pump 120 may be disposed on the acid addition pipe 114, and a base addition control pump 122 may be disposed on the base addition pipe 116. Correspondingly, a pH meter 124 may be provided in the pH adjustment tank 102.

Specifically, a probe of the pH meter 124 may be inserted into the pH adjustment tank 102, and the pH meter 124 may be provided in interlock with the acid addition control pump 120 and the alkali addition control pump 122. During actual use, the feed liquid enters the pH adjustment tank 102, and at the same time, a certain value is displayed on the pH meter 124. If the pH deviates from the set value, the interlock acid addition control pump 120 or the base addition control pump 122 is started, so that acid solution is added to lower the pH of the feed solution or alkali solution is added to raise the pH. In an alternative embodiment, the acid-adding control pump 120 and the alkali-adding control pump 122 may be configured as metering pumps capable of performing variable frequency control, so as to realize interlocking control to adjust the flow rate of the metering pumps and realize the injection of different amounts of acid or alkali.

Referring again to fig. 1, in an embodiment of the present invention, an overflow port may be provided on a sidewall of the pH adjustment tank 102, and an outlet pipe 108 as described above may be connected to the overflow port. Further, the pH meter 124 as described above may be disposed adjacent to the overflow port, and the probe of the pH meter 124 may be located at a position lower than the overflow port in the height direction of the wastewater pH adjusting apparatus 100. During actual production operation, in order to ensure the accuracy of the pH value of the feed liquid overflowing to the next process, the probe of the pH meter 124 is provided with a sleeve pipe, and the height of the probe can be slightly lower than the overflow port, so that the measured pH value of the feed liquid can be ensured to be the feed liquid required by the overflow to the next process.

With continued reference to fig. 1, in an embodiment of the present invention, the portion of second conduit 112 outside of pH adjustment tank 102 may be provided with a circulation pump 126 and a pressure gauge 128, in order to power the mixing and circulation of the feed liquid and to monitor the pressure of the feed liquid. Further, a tail gas discharge pipe 130 may be connected to the pH adjustment tank 102. The exhaust gas discharge pipe 130 may be used to discharge the exhaust gas during the conditioning process. In one embodiment, the off-gas exhaust pipe 130 and the feed pipe 106 as described above may both be disposed at the top of the pH adjustment tank 102. It should be understood, of course, that the foregoing description is only illustrative of the invention and is not intended to limit the invention in any way.

In summary, in the wastewater pH adjusting apparatus 100 according to the embodiment of the present invention, the acid adding pipe 114 and the alkali adding pipe 116 are connected to the feed liquid pipeline, i.e., the first pipeline 110, through the pipeline mixer 104, so that the first-stage mixing of the feed liquid and the acid and the alkali can be achieved. The circulating pump discharge pipeline, i.e. the second pipeline 112, extends inwards to the pH adjusting tank 102 and is provided with the venturi ejector 118, so that the second-stage mixing of the feed liquid and the acid and the alkali can be realized. In addition, the pH meter 124 is interlocked with the acid addition control pump 120 or the alkali addition control pump 122, so that precise control of the amount of acid or alkali addition can be achieved. And, the probe position of pH meter 124 sets up near the overflow mouth, has guaranteed that the feed liquid pH value that gets into next process is at the setting value.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A wastewater pH adjusting device, comprising:

the pH adjusting tank is provided with a feeding pipe and a discharging pipe;

the pipeline mixer is arranged outside the pH adjusting tank, the first end of the pipeline mixer is connected with the bottom of the pH adjusting tank through a first pipeline, the second end of the pipeline mixer is connected with a second pipeline, the second pipeline extends into the pH adjusting tank, and the pipeline mixer is further connected with an acid adding pipe and an alkali adding pipe.

2. The wastewater pH adjusting device according to claim 1, characterized in that the portion of the second pipeline extending into the pH adjusting tank is provided with at least one Venturi ejector,

wherein, the bottom inlet of the venturi ejector is connected with the second pipeline, and the side wall inlet and the top outlet are communicated with the inside of the pH adjusting tank.

3. The wastewater pH adjustment device of claim 2, further comprising a plurality of the venturi ejectors, wherein a plurality of the venturi ejectors are laterally spaced apart and arranged side-by-side with each other.

4. The wastewater pH adjusting apparatus according to claim 1, wherein a portion of the second pipe that protrudes into the pH adjusting tank is configured into an annular tubular structure or a polygonal tubular structure.

5. The wastewater pH adjusting apparatus according to claim 1, wherein the second pipe extends into the pH adjusting tank from a top thereof or from a side wall thereof.

6. The wastewater pH adjusting apparatus according to any one of claims 1 to 5, wherein an acid addition control pump is provided on the acid addition pipe, an alkali addition control pump is provided on the alkali addition pipe, and a pH meter is provided on the pH adjusting tank,

wherein a probe of the pH meter extends into the pH adjusting tank, and the pH meter is arranged in an interlocking manner with the acid adding control pump and the alkali adding control pump.

7. The pH adjusting device for wastewater according to claim 6, wherein an overflow port is provided on a side wall of the pH adjusting tank, the discharge pipe is connected to the overflow port,

the pH meter is arranged adjacent to the overflow port, and the position of a probe of the pH meter is lower than that of the overflow port.

8. The wastewater pH adjusting apparatus according to claim 6, wherein the acid addition control pump and the alkali addition control pump are each configured as a metering pump capable of variable frequency control.

9. The wastewater pH adjusting device according to claim 1, wherein a circulating pump and a pressure gauge are sequentially arranged on the part of the second pipeline outside the pH adjusting tank.

10. The wastewater pH adjusting device of claim 1, further comprising a tail gas discharge pipe connected to the pH adjusting tank, wherein the tail gas discharge pipe and the feeding pipe are both arranged at the top of the pH adjusting tank.