Lye feeding device and pH self-control system thereof

Abstract

The utility model belongs to the technical field of chemical equipment, concretely relates to a lye feeding device and its pH self -control system, the device includes: the reaction tank, its jar body is provided with lye import; The detection end of pH sensor is immersed in the waste liquid in the reaction tank; At least one metering pump, its import end is connected with external lye tank through main input pipeline, and the export is connected with lye import; Among them, the metering pump and pH sensor are electrically connected with a control module, and the control module is configured as: receiving the pH value data of pH sensor, and according to corresponding pH value control metering pump to open or stop conveying lye.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, and in particular relates to an alkaline solution feeding device and its pH automatic control system. Background Technology

[0002] In the field of water treatment, especially in the treatment of wastewater containing suspended solids, colloids, and other impurities (such as industrial wastewater and domestic sewage), flocculation and sedimentation are key steps in achieving solid-liquid separation and purifying water. The effectiveness of flocculation directly affects the efficiency of subsequent treatment units and the final effluent quality. The effectiveness of the flocculation process is highly dependent on the pH value of the wastewater. Taking commonly used inorganic flocculants such as aluminum salts (e.g., aluminum sulfate, polyaluminum chloride PAC) or iron salts (e.g., ferric chloride, polyferric sulfate PFS) as examples, they have a suitable pH range (pH 6-8) for optimal flocculation. When the initial pH value of the wastewater is low, the flocculation effect is significantly reduced.

[0003] In practical engineering, adding alkaline solution to raise the pH value of wastewater improves flocculation. This method typically requires operators to take samples for testing and add alkaline solution based on the results, leading to a delayed response and inaccurate pH control.

[0004] Therefore, how to avoid the lag in wastewater pH control is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one alkali feeding device and its pH control system.

[0007] In a first aspect, embodiments of this disclosure provide an alkaline solution feeding device, comprising: a reaction tank, the tank body of which is provided with an alkaline solution inlet; The pH sensor, with its sensing end immersed in the waste liquid inside the reaction vessel; At least one metering pump, the inlet of which is connected to an external alkali tank via a main input pipe, and the outlet of which is connected to the alkali inlet; The metering pump and pH sensor are both electrically connected to a control module, which is configured to receive pH data from the pH sensor and control the metering pump to start or stop delivering alkaline solution based on the corresponding pH value.

[0008] In one alternative implementation, a pulse damper is provided on the main input pipe.

[0009] In one optional embodiment, the number of metering pumps is two, and the inlet ends of the two metering pumps are respectively connected to the main input pipeline through independent input branch pipes, and the outlet ends are respectively connected to the main output pipeline through independent output branch pipes. The main output pipeline is connected to the alkali inlet; and... Both the input branch pipe and the output branch pipe are equipped with valves.

[0010] In one optional embodiment, a conduit is provided between the main output pipe and the main input pipe, and a safety valve is provided on the conduit.

[0011] In one optional implementation, a pressure sensor is provided on the main input pipeline, and both the pressure sensor and the safety valve are electrically connected to the control module, which is configured to open the safety valve when the pressure exceeds a set threshold.

[0012] In one optional implementation, the control module is configured to: When the pH sensor detects a pH value less than 6, turn on the metering pump; or, When the pH sensor detects a pH value greater than 8, the metering pump is turned off.

[0013] Secondly, this disclosure also provides a pH control system for an alkaline solution feeding device, including: a pH sensor for detecting the pH value of waste liquid in the reaction tank; The metering pump has its inlet connected to an external alkali tank via a main input pipeline, and its outlet connected to a reaction tank. The control module is electrically connected to the pH sensor and the metering pump, and is configured to: receive pH value data from the pH sensor, and control the metering pump to start or stop delivering alkaline solution according to the corresponding pH value.

[0014] In one alternative implementation, a pulse damper is provided on the main input pipe.

[0015] In one optional implementation, the control module is configured to: When the pH sensor detects a pH value less than 6, turn on the metering pump; or, When the pH sensor detects a pH value greater than 8, the metering pump is turned off.

[0016] The beneficial effects of this utility model are that the alkaline solution feeding device can monitor the pH value of the waste liquid in the reaction tank in real time by setting a pH sensor in the reaction tank. When the pH value is too low, the control module controls the metering pump to add alkaline solution to the reaction tank to raise the pH value of the wastewater, thereby improving the flocculation effect. It eliminates the need for manual sampling and testing, thus avoiding the lag in pH control.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A perspective view of an alkaline solution feeding device provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of a control module for an alkali feeding device provided in an embodiment of the present disclosure.

[0021] In the picture: 100. Reaction vessel; 110. Alkali inlet; 200. pH sensor; 300. Metering pump; 400. Main input pipe; 410. Input branch pipe; 420. Pulse damper; 430. Pressure sensor; 500. Main output pipe; 510. Output branch pipe; 600. Valve; 700. Conduit; 710. Safety valve; 800. Control module. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0024] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0025] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0026] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0027] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0028] Research has revealed a drawback of existing technologies: In the wastewater flocculation and sedimentation process, adding alkali solution to raise the pH value of the wastewater, thereby improving the flocculation effect, typically requires operators to take samples for testing and add alkali solution based on the test results. This leads to a lag in response and inaccurate pH control.

[0029] Based on the above research, this disclosure provides an alkaline solution feeding device and its pH automatic control system. The pH sensor replaces manual sampling and detection, and the pH sensor then transmits the pH signal to the control module. The control module automatically turns the metering pump on or off according to the pH signal, thereby achieving automatic pH adjustment and solving the above problems.

[0030] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] See Figure 1 and Figure 2 This disclosure provides an alkali solution feeding device, including: a reaction tank 100, the tank body of which is provided with an alkali solution inlet 110; a pH sensor 200 is installed on the reaction tank 100, the detection end of which is immersed in the waste liquid inside the reaction tank 100 for real-time detection of the pH value of the waste liquid. At least one metering pump 300, the inlet end of which is connected to an external alkali solution tank through a main input pipe 400, and the outlet end of which is connected to the alkali solution inlet 110. Both the metering pump 300 and the pH sensor 200 are electrically connected to a control module 800, the control module 800 being configured to: receive pH value data from the pH sensor 200, and control the metering pump 300 to start or stop delivering alkali solution according to the corresponding pH value. pH sensor 200 can monitor the pH value of waste liquid in reaction tank 100 in real time. When the pH value is too low, control module 800 controls metering pump 300 to add alkaline solution to reaction tank 100 to increase the pH value of wastewater, thereby improving the flocculation effect. This eliminates the need for manual sampling and testing, thus avoiding the lag in pH control.

[0034] See also Figure 1In some embodiments, a pulse damper 420 is provided on the main input pipe 400. The pulse damper 420 is suitable for reducing the pressure and flow pulsations of the fluid in the pipe caused by the periodic operation of the metering pump 300, so that the addition of alkali solution each time the metering pump 300 is turned on is relatively smooth and controllable.

[0035] See also Figure 1 In some embodiments, there are two metering pumps 300, and the two metering pumps 300 are connected in parallel: the inlet ends of the two metering pumps 300 are respectively connected to the main input pipe 400 through independent input branch pipes 410, and the outlet ends are respectively connected to the main output pipe 500 through independent output branch pipes 510. The main output pipe 500 is connected to the alkali inlet 110; and both the input branch pipe 410 and the output branch pipe 510 are equipped with valves 600. Under normal circumstances, one metering pump 300 is in working condition, and the other is in standby condition. When one metering pump 300 fails, simply close the valves 600 of the output branch pipe 510 and the input branch pipe 410 connected to that metering pump 300; and open the valves 600 of the corresponding output branch pipe 510 and the input branch pipe 410 of the other metering pump 300 to achieve continuous operation without stopping the pump.

[0036] See Figure 1 and Figure 2 In some embodiments, a conduit 700 is provided between the main output pipe 500 and the main input pipe 400 for pressure relief and backflow in case of overpressure. A safety valve 710 is provided on the conduit 700. A pressure sensor 430 is provided on the main input pipe 400. Both the pressure sensor 430 and the safety valve 710 are electrically connected to the control module 800. The control module 800 is configured to open the safety valve 710 when the pressure exceeds a set threshold. Optionally, the safety threshold can be set to 1.5 times the pipe design pressure. By monitoring the pressure of the main input pipe 400 in real time, the safety valve 710 is automatically opened when the pressure is about to reach a dangerous level (exceeding the safety set threshold), thereby quickly and automatically releasing the abnormally high pressure in the system, protecting the metering pump 300, pipes and related equipment from overpressure damage, and effectively preventing equipment failure, dangerous leakage and potential safety accidents.

[0037] See also Figure 1 In some embodiments, the control module 800 is configured to: turn on the metering pump 300 when the pH sensor 200 detects a pH value less than 6; and turn off the metering pump 300 when the pH sensor 200 detects a pH value greater than 8; so that the pH value of the waste liquid is within the pH range for optimal flocculation effect.

[0038] See Figure 1Some embodiments also provide a pH control system for an alkali feeding device, including: a pH sensor 200 for detecting the pH value of waste liquid in a reaction tank 100; a metering pump 300, the inlet of which is connected to an external alkali tank through a main input pipe 400, and the outlet of which is connected to the reaction tank 100; and a control module 800 electrically connected to the pH sensor 200 and the metering pump 300, and configured to: receive pH value data from the pH sensor 200, and control the metering pump 300 to start or stop supplying alkali liquid according to the corresponding pH value.

[0039] As one specific implementation, the pH sensor 200 may be, but is not limited to, an InPro 3250, and the control module may be a PLC (Siemens S7-1200).

[0040] The method of turning the metering pump on or off by controlling the module according to the signal from the pH sensor involved in this embodiment is existing technology, and this embodiment does not make any substantial improvement to the above method.

[0041] In summary, this alkali feeding device, by installing a pH sensor 200 inside the reaction tank 100, can monitor the pH value of the waste liquid in the reaction tank 100 in real time. When the pH value is too low, the control module 800 controls the metering pump 300 to add alkali solution to the reaction tank 100 to raise the pH value of the wastewater, thereby improving the flocculation effect. This eliminates the need for manual sampling and testing, thus avoiding the lag in pH control.

[0042] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0044] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0045] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0046] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An alkaline solution feeding device, characterized in that, include: The reaction vessel (100) is equipped with an alkaline inlet (110). pH sensor (200), the sensing end of which is immersed in the waste liquid inside the reaction vessel (100); At least one metering pump (300) has its inlet end connected to an external alkali tank via a main input pipe (400) and its outlet end connected to an alkali inlet (110); The metering pump (300) and pH sensor (200) are both electrically connected to a control module (800). The control module (800) is configured to receive pH data from the pH sensor (200) and control the metering pump (300) to start or stop delivering alkaline solution according to the corresponding pH value.

2. The alkali feeding device as described in claim 1, characterized in that, A pulse damper (420) is provided on the main input pipe (400).

3. The alkali feeding device as described in claim 1, characterized in that, The metering pumps (300) are of two types, and the inlet ends of the two metering pumps (300) are connected to the main input pipeline (400) through independent input branch pipes (410), and the outlet ends are connected to the main output pipeline (500) through independent output branch pipes (510). The main output pipe (500) is connected to the alkali inlet (110); and, Both the input branch pipe (410) and the output branch pipe (510) are equipped with valves (600).

4. The alkali feeding device as described in claim 3, characterized in that, A conduit (700) is provided between the main output pipe (500) and the main input pipe (400), and a safety valve (710) is provided on the conduit (700).

5. The alkali feeding device as described in claim 4, characterized in that, A pressure sensor (430) is provided on the main input pipe (400). The pressure sensor (430) and the safety valve (710) are both electrically connected to the control module (800). The control module (800) is configured to open the safety valve (710) when the pressure exceeds a set threshold.

6. The alkali feeding device as described in claim 1, characterized in that, The control module (800) is configured to: When the pH sensor (200) detects a pH value less than 6, the metering pump (300) is turned on; or, When the pH sensor (200) detects a pH value greater than 8, the metering pump (300) is turned off.

7. A pH control system for an alkali solution feeding device, characterized in that, include: pH sensor (200) is used to detect the pH value of waste liquid in reaction vessel (100); The metering pump (300) has its inlet end connected to the external alkali tank through the main input pipe (400), and its outlet end connected to the reaction tank (100); The control module (800) is electrically connected to the pH sensor (200) and the metering pump (300) and is configured to receive pH data from the pH sensor (200) and control the metering pump (300) to start or stop delivering alkaline solution according to the corresponding pH value.

8. The pH automatic control system as described in claim 7, characterized in that, A pulse damper (420) is provided on the main input pipe (400).

9. The pH automatic control system as described in claim 7, characterized in that, The control module (800) is configured to: When the pH sensor (200) detects a pH value less than 6, the metering pump (300) is turned on; or, When the pH sensor (200) detects a pH value greater than 8, the metering pump (300) is turned off.

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