Construction wastewater pH adjusting treatment equipment

Abstract

The present application relates to sewage treatment technical field, specifically, it relates to a kind of construction wastewater pH adjustment treatment equipment, it includes neutralization pond and be used for dosing neutralizing agent to neutralization pond dosing mechanism, the neutralization pond is equipped with water inlet and water outlet, the neutralization pond is provided with first adjusting chamber being communicated with water inlet, and second adjusting chamber being communicated with water outlet, wastewater enters second adjusting chamber from first adjusting chamber;The present application is by being provided with second adjusting chamber, and setting the adjusting plate that can vertically slide in second adjusting chamber, when water inflow increases, monitoring module real-time acquisition wastewater impact force data to sensing mechanism.One aspect, according to impact force signal driving adjusting plate sliding in second adjusting chamber, increase the effective volume of second adjusting chamber, to extend the hydraulic retention time of wastewater in adjusting chamber;Second aspect, with the impact force data as feedforward control signal, increase reagent dosing quantity in advance at the beginning of wastewater into neutralization pond.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a device for adjusting the pH of construction wastewater. Background Technology

[0002] Construction processes generate large amounts of wastewater containing various pollutants. The concentrations of these conventional pollutants are typically high. Wastewater from concrete mixing, curing, and sand and gravel washing processes, in particular, releases large amounts of alkaline substances such as calcium hydroxide due to cement hydration, resulting in pH values ​​often as high as 11-12, indicating strong alkalinity. Direct discharge of this highly turbid and alkaline construction wastewater will cause serious pollution and damage to the surrounding water bodies, soil, and other natural environments.

[0003] Currently, various technologies have been developed in the industry for treating construction wastewater. Common treatment processes include combinations of methods such as physical sedimentation, acid-base neutralization, flocculation, inclined tube sedimentation, and filtration. Among these, acid-base neutralization is the core step in adjusting the pH value of wastewater to meet discharge standards or for reuse. Traditional neutralization methods mainly involve adding mineral acids such as hydrochloric acid and sulfuric acid to the wastewater. To achieve precise control, some systems have introduced online pH sensors and automatic dosing devices to adjust the dosage of chemicals based on real-time monitoring of the pH value.

[0004] However, most existing acid-base adjustment technologies for construction wastewater employ continuous neutralization processes. This involves wastewater continuously flowing into the treatment equipment, remaining there for a certain period, and then flowing out. During the treatment process, chemicals are continuously added simultaneously to maintain a balanced ratio between wastewater and chemicals. However, this continuous neutralization process has the following problems: First, because construction wastewater is generated intermittently, its discharge volume often fluctuates with the switching of construction procedures. When the influent to the treatment equipment suddenly increases, the wastewater flow rate accelerates, resulting in a shorter effective residence time within the treatment equipment. The acid-base neutralization reaction may not be fully completed before the wastewater flows out of the equipment, affecting the quality of the effluent. Secondly, when an increase in the influent flow causes a change in the pH level of the tank, the online sensors require a response time to detect the change before the control system can instruct the dosing pump to increase the dosage of the chemical. However, during this delay between the sensor response and the system execution of the instruction, some wastewater with a compressed residence time may have already flowed out of the neutralization tank and not been adequately neutralized by the chemical, ultimately leading to significant fluctuations in the pH level of the effluent. Summary of the Invention

[0005] The purpose of this invention is to provide a construction wastewater pH adjustment and treatment device, which solves the problems mentioned in the background art, namely insufficient hydraulic retention time and delayed dosing control, by setting up a second adjustment chamber and synchronously adjusting the effective volume and dosage of the second adjustment chamber according to the change of influent flow.

[0006] To achieve the above objectives, a construction wastewater pH adjustment and treatment device includes a neutralization tank and a dosing mechanism for adding neutralizing agents to the neutralization tank. The neutralization tank has an inlet and an outlet. The neutralization tank contains a first regulating chamber connected to the inlet and a second regulating chamber connected to the outlet. Wastewater enters the second regulating chamber from the first regulating chamber. The device also includes: A sensing mechanism is installed at the water inlet, and the sensing mechanism has a contact part that comes into contact with the wastewater to withstand the impact of the wastewater; The monitoring module is used to acquire data on the impact force of wastewater on the sensing mechanism; An adjustment mechanism is vertically slidably disposed in the second adjustment chamber. The adjustment mechanism is configured to adjust its position in the second adjustment chamber according to the impact force data, so as to change the effective volume of the second adjustment chamber and thereby adjust the residence time of wastewater in the neutralization tank. The dosing mechanism uses the impact force data as a feedforward signal to adjust the dosage of the drug added to the neutralization tank before the pH value in the neutralization tank changes.

[0007] In the above technical solution, when wastewater flows in through the inlet, the sensing mechanism generates a displacement corresponding to the inflow volume under the impact of the wastewater, and the monitoring module acquires the impact force data in real time. When the inflow volume increases, on the one hand, the regulating mechanism slides downward in the second regulating chamber according to the impact force data, increasing the effective volume of the second regulating chamber and prolonging the residence time of the wastewater in the neutralization tank; on the other hand, the dosing mechanism uses the impact force data as a feedforward signal to pre-increase the dosage of the chemical agent before the actual change in the pH value in the tank.

[0008] Based on this, the adjustment mechanism includes an adjustment plate and a driving component for driving the adjustment plate to rise and fall; The outer peripheral wall of the regulating plate slides against the inner wall of the second regulating chamber to divide the second regulating chamber into an upper space and a lower space. When wastewater from the first regulating chamber enters the second regulating chamber, the wastewater falls onto the top surface of the regulating plate.

[0009] Based on this, the driving component includes a vertically arranged lead screw, the bottom end of which rotates through the bottom of the neutralization tank and is connected to a motor installed at the bottom of the neutralization tank, and the top end passes through an adjustment plate and is threadedly connected to the adjustment plate.

[0010] Based on this, the water inlet extends to one side to form a tubular structure; The sensing mechanism includes a water-blocking plate located inside the water inlet, and a water-permeable port is provided on the side wall of the water-blocking plate; A straight rod is fixedly connected to one side of the water-blocking plate. One end of the straight rod slides through a sliding seat. The sliding seat is fixedly installed on the top of the partition. An end plate is fixedly connected to the end of the straight rod that passes through the sliding seat. A return spring is provided between the end plate and the side wall of the sliding seat.

[0011] Based on this, the monitoring module includes a microcontroller and a sensor that is communicatively connected to the microcontroller. The sensor is used to acquire the impact force data of wastewater on the water-blocking plate, and the microcontroller controls the motor according to the impact force data. The sensor is located on the side of the neutralization tank near the outlet, and corresponds to the position of the end plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this construction wastewater pH adjustment and treatment equipment, a second adjustment chamber is set up, and a vertically sliding adjustment plate is installed in the second adjustment chamber. When the influent flow rate increases, the monitoring module acquires the impact force data of the wastewater on the sensing mechanism in real time. Based on this impact force data, on the one hand, the adjustment plate is driven to slide in the second adjustment chamber according to the impact force signal, increasing the effective volume of the second adjustment chamber, thereby prolonging the hydraulic residence time of the wastewater in the adjustment chamber and weakening the flow velocity impact caused by the increase in influent flow rate; on the other hand, the impact force data is used as a feedforward control signal to increase the dosage of the reagent in advance at the beginning of the wastewater entering the neutralization tank, avoiding the discharge of some wastewater before it is fully mixed with the reagent due to the delay in dosing.

[0013] 2. In this construction wastewater pH adjustment and treatment equipment, the sensing mechanism is not only used to sense the influent flow rate, but also works in conjunction with the regulating plate. When the influent flow rate fluctuates slightly, the regulating plate controls the water-blocking plate to remain in place at the inlet. At this time, the water-blocking plate, through its own structure, divides the wastewater into upper and lower layers, allowing the reagent to fall into the middle of the lower water body along with the wastewater flowing out of the permeator, thus achieving pre-mixing of the reagent in the wastewater and improving the overall efficiency of the neutralization reaction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the neutralization tank of the present invention; Figure 3 This is a schematic diagram of the structure of the adjusting plate of the present invention; Figure 4 This is a schematic diagram of the sensing mechanism of the present invention; Figure 5 This is a schematic diagram showing the position of the adjusting plate of the present invention; Figure 6This is a schematic diagram of the structure of the adjustment component of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the adjustment component of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the working state of the adjustment component of the present invention; Figure 9 This is a schematic diagram of the structure of the contraction section of the present invention; Figure 10 This is a schematic diagram of the structure of the water-proof part of the present invention; Figure 11 This is a schematic diagram of the drainage state of the permeable port of the present invention.

[0015] The meanings of the labels in the diagram are as follows: 100. Dosing mechanism; 101. Chemical storage tank; 102. Dosing system; 103. Dosing pipe; 110. Neutralization tank; 111. Inlet; 112. Outlet; 113. Aeration mechanism; 120. First regulating chamber; 121. Second regulating chamber; 122. Baffle; 130. Regulating plate; 131. Lead screw; 132. Motor; 133. Sheath; 140. Sensing mechanism; 141. Water baffle; 142. Water outlet; 1 43. Straight rod; 144. Sliding seat; 145. End plate; 146. Return spring; 147. Abutment rod; 148. Contraction part; 149. Waterproof part; 150. Distance sensor; 160. Adjustment assembly; 161. Fixed plate; 162. Moving plate; 163. Slide groove; 164. Movable cavity; 165. Protruding rib; 166. Protrusion; 167. Inclined surface; 170. Pressure sensor; 180. Dosing port; 200. Lower water layer. Detailed Implementation

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] Construction wastewater from building sites contains a large amount of alkaline substances such as calcium hydroxide due to cement hydration, making it highly alkaline (pH value typically as high as 11-12). Therefore, it needs to be neutralized using pH adjustment equipment. Figure 1 As shown, the treatment equipment includes a dosing unit 100 and a neutralization tank 110, wherein the dosing unit 100 is used to add water pollution control agents into the neutralization tank 110. In this invention, the water pollution control agents for treating wastewater include sulfuric acid (H2SO4), hydrochloric acid (HCl), oxalic acid, etc.

[0020] exist Figure 1 In the illustrated embodiment, the dosing mechanism 100 mainly consists of a storage tank 101 for storing chemicals and a dosing system 102. The storage tank 101 is typically made of corrosion-resistant materials such as polyethylene (PE) or fiberglass (FRP); it is equipped with a level gauge (such as a magnetic level gauge or ultrasonic level gauge) to monitor the dosage in real time; and it has a breather valve and a manhole (for personnel to enter the equipment). The dosing system 102 includes a metering pump, a PLC control cabinet, and a pH sensor. The pH sensor is located inside the neutralization tank 110 to obtain the pH value (acidity / alkalinity) of the wastewater in the neutralization tank 110. The PLC control cabinet can automatically adjust the frequency or stroke of the metering pump based on the data from the neutralization tank 110. The drain end of the metering pump is connected to a dosing pipe 103, one end of which extends above the neutralization tank 110, allowing the chemicals to be added into the neutralization tank 110.

[0021] like Figure 2 As shown, the neutralization tank 110 contains a regulating chamber for the mixing and reaction of wastewater and chemicals. Wastewater enters the regulating chamber through the inlet 111 located on one side of the dosing mechanism 100, while chemicals are simultaneously added into the regulating chamber through the dosing pipe 103. The wastewater and chemicals come into contact and mix in the regulating chamber, and then react thoroughly under the action of the stirring mechanism. Finally, the mixture is discharged through the outlet 112 located on the other side of the neutralization tank 110 and enters the subsequent treatment equipment.

[0022] The stirring mechanism can be either mechanical or air-driven, depending on the actual working conditions. As a preferred embodiment of the invention, taking air-driven stirring as an example, an aeration mechanism 113 needs to be installed at the bottom of the equalization tank, and an air compressor connected to it is required. During operation, the air compressor releases compressed air through the aeration mechanism 113 at the bottom of the tank (e.g., a diaphragm-type anti-clogging aeration head or a fishbone-type aeration pipe), forming a large number of rising bubbles. The rising bubbles strongly disturb the water, achieving uniform mixing of wastewater and chemicals, and promoting the full progress of the neutralization reaction.

[0023] In terms of flow channel design, the inlet 111 and outlet 112 are respectively located on both sides of the neutralization tank 110 along its length to maximize the horizontal distance between them. This design ensures that wastewater entering through the inlet 111 must travel a longer path within the regulating chamber before reaching the outlet 112, thus guaranteeing sufficient hydraulic residence time and ensuring a complete neutralization reaction. Furthermore, both the inlet 111 and outlet 112 are positioned near the top of the neutralization tank 110. This design requires the liquid level within the regulating chamber to be higher than the height of the outlet 112 for wastewater to overflow from it, thereby increasing the effective liquid level height and volume within the regulating chamber, allowing it to accommodate and treat more wastewater.

[0024] In terms of installation layout, the neutralization tank 110 is preferably located underground, and its installation height is lower than the liquid level of the wastewater storage tank at the construction site. In this way, the wastewater in the wastewater storage tank can flow into the regulating chamber automatically through the inlet 111 under the action of gravity without the need for external power, thereby saving energy consumption and simplifying operation.

[0025] However, when the volume of construction wastewater fluctuates, an increase in the influent volume causes a rapid rise in the liquid level in the regulating chamber, leading to premature overflow of wastewater from the outlet 112. This shortens the residence time and affects the complete neutralization reaction. To address this, the present invention increases the number of regulating chambers and incorporates a sensing mechanism 140 to automatically adjust the residence time during flow fluctuations.

[0026] exist Figure 2 and Figure 3 In the illustrated embodiment, the number of regulating chambers is increased from one to two, namely a first regulating chamber 120 and a second regulating chamber 121. The first regulating chamber 120 is connected to the inlet 111, and the second regulating chamber 121 is connected to the outlet 112. The first regulating chamber 120 and the second regulating chamber 121 are separated by a partition 122. After the wastewater enters the first regulating chamber 120 through the inlet 111, the liquid level gradually rises due to the obstruction of the partition 122. It then overflows through the top of the partition 122 into the second regulating chamber 121, and finally is discharged through the outlet 112 to subsequent treatment equipment.

[0027] The baffle 122 is vertically installed, with its top height lower than that of the neutralization tank 110. This design ensures that the liquid in the first regulating chamber 120 can overflow smoothly into the second regulating chamber 121 through the top of the baffle 122, while also preventing wastewater from overflowing into the neutralization tank 110 during the overflow process, thus avoiding environmental pollution.

[0028] Furthermore, the sensing mechanism 140 is elastically slidably disposed within the inlet 111, and the sensing mechanism 140 has a contact portion that directly contacts the wastewater within the inlet 111. The contact portion causes the sensing mechanism 140 to displace accordingly based on the impact force of the wastewater within the inlet 111. Moreover, the present invention also includes a monitoring module, which acquires data on the impact force of the wastewater on the sensing mechanism 140 based on its displacement state.

[0029] A vertically sliding regulating mechanism is installed within the second regulating chamber 121. When the impact force data measured by the monitoring module is lower than a preset value, indicating a decrease in the influent flow rate, the regulating mechanism slides upward within the second regulating chamber 121, reducing its effective volume. Conversely, when the impact force data is higher than the preset value, indicating an increase in the influent flow rate, the regulating mechanism slides downward within the second regulating chamber 121, increasing its effective volume. By adjusting the position of the regulating mechanism within the second regulating chamber 121, the volume of the chamber is adjusted in real time, thereby altering the overall residence time of the wastewater in the neutralization tank 110 and ensuring sufficient neutralization reaction time under different influent flow rates.

[0030] Meanwhile, the dosing mechanism 100 dynamically adjusts the dosage of chemicals based on the impact force data measured by the monitoring module: when the impact force increases (i.e., the influent flow rate increases), the dosage is automatically increased; when the impact force decreases (i.e., the influent flow rate decreases), the dosage is automatically reduced. This control method uses the impact force data from the monitoring module as a feedforward signal to pre-adjust the dosage at the beginning of wastewater entering the neutralization tank 110.

[0031] Specifically, such as Figure 3 As shown, the adjustment mechanism includes an adjustment plate 130 and a drive component for driving the adjustment plate 130 to rise and fall. The outer contour shape of the adjustment plate 130 is adapted to the cross-sectional shape of the second adjustment chamber 121, and the outer peripheral wall of the adjustment plate 130 slides against the inner wall of the second adjustment chamber 121. Meanwhile, to ensure a tight seal between the two, sealing components such as rubber sealing rings can be provided at the contact area to prevent wastewater from leaking through the gap between the adjustment plate 130 and the inner wall of the second adjustment chamber 121.

[0032] Thus, the regulating plate 130 divides the second regulating chamber 121 into an upper space and a lower space, which are not connected to each other. When wastewater in the first regulating chamber 120 overflows into the second regulating chamber 121 through the top of the partition 122, the wastewater falls onto the top surface of the regulating plate 130 and accumulates only in the upper space of the second regulating chamber 121. The lower space does not participate in wastewater storage. Therefore, by adjusting the vertical position of the regulating plate 130 in the second regulating chamber 121 through the driving component, the height of the top surface of the regulating plate 130 can be changed, thereby changing the effective volume of the upper space of the second regulating chamber 121 and realizing real-time adjustment of the wastewater residence time.

[0033] The driving component can be a linear drive mechanism such as a cylinder, an electric push rod, or a lead screw 131. As a specific implementation, this embodiment uses a lead screw 131 as an example. The lead screw 131 is vertically positioned, with its bottom end rotating through the bottom of the neutralization tank 110 and connected to a motor 132 mounted at the bottom of the neutralization tank 110. The top end of the lead screw 131 extends upwards and passes through an adjusting plate 130, and the lead screw 131 and the adjusting plate 130 are connected by a threaded connection. When the motor 132 drives the lead screw 131 to rotate forward or reverse, the adjusting plate 130 rises or falls stably along the axis of the lead screw 131 under the drive of the thread, achieving precise volume adjustment.

[0034] Furthermore, to prevent wastewater in the upper space of the second regulating chamber 121 from leaking downwards along the connection between the lead screw 131 and the regulating plate 130, the present invention also provides a protective sleeve 133 on the top surface of the regulating plate 130 at the point where the lead screw 131 passes through. This protective sleeve 133 is fitted around the outer periphery of the lead screw 131, its bottom end is fixedly connected to the regulating plate 130, and its top end extends upwards, exceeding the highest wastewater level in the second regulating chamber 121. In this way, the protective sleeve 133 forms a protective barrier above the liquid level around the outer periphery of the lead screw 131, preventing wastewater from seeping into the lower space along the connection gap between the lead screw 131 and the regulating plate 130.

[0035] like Figure 3 and Figure 4 As shown, the inlet 111 extends to one side to form a tubular structure, and the contact portion of the sensing mechanism 140 is disposed inside the tubular structure. Specifically, the contact portion of the sensing mechanism 140 includes a water-blocking plate 141. The outer contour shape of the water-blocking plate 141 is adapted to the cross-sectional shape of the inlet 111, and the water-blocking plate 141 is slidably disposed inside the inlet 111, and can move along the axial direction of the inlet 111 under the push of wastewater.

[0036] The side wall of the water-blocking plate 141 is provided with a through-hole 142 for water supply and circulation, while the part without the through-hole 142 is in direct contact with the wastewater in the inlet 111 and bears the impact force of the water flow, so that the wastewater can exert an effective pushing force on the water-blocking plate 141.

[0037] In terms of installation structure, a straight rod 143 is fixedly connected to the side of the water-blocking plate 141 facing the second regulating chamber 121. To improve the stability of the water-blocking plate 141 during sliding, two straight rods 143 are preferably provided, arranged in parallel. One end of the straight rod 143 is fixedly connected to the water-blocking plate 141, and the other end is slidably disposed on the sliding seat 144, which is fixedly installed inside the neutralization tank 110 (e.g., fixed to the top of the partition 122). The ends of the two straight rods 143 that pass through the sliding seat 144 are jointly fixedly connected to an end plate 145. By providing a return spring 146 between the end plate 145 and the side wall of the sliding seat 144, the water-blocking plate 141 is elastically slidably installed within the inlet 111.

[0038] With the above design, when the wastewater flow rate in the inlet 111 is small, the wastewater flows smoothly through the permeator 142, resulting in a small impact force on the baffle plate 141. The return spring 146 is in an unstretched or slightly stretched state, and the baffle plate 141 remains in its initial position close to the inlet side of the inlet 111. When the wastewater flow rate in the inlet 111 suddenly increases, the flow capacity of the permeator 142 is insufficient to allow all the wastewater to pass through in time. The wastewater accumulates on the inlet side of the baffle plate 141, causing a sudden increase in the impact force on the baffle plate 141. This pushes the baffle plate 141 to overcome the elastic force of the return spring 146 and move towards the second regulating chamber 121. The baffle plate 141 then drives the straight rod 143 to slide synchronously towards the second regulating chamber 121. At this time, the return spring 146 is further stretched.

[0039] The monitoring module includes a microcontroller and a sensor that communicates with the microcontroller. In this embodiment, the communication connection refers to the establishment of a data communication link between the sensor and the microcontroller to achieve reliable transmission of the detection signal. Specifically, the communication connection can be a wired communication connection and / or a wireless communication connection. Wired communication connections include, but are not limited to, I2C bus connections, SPI bus connections, UART serial port connections, or single-bus connections; wireless communication connections include, but are not limited to, Bluetooth connections, WiFi connections, ZigBee connections, or radio frequency connections.

[0040] The sensor is used to acquire data on the impact force exerted by wastewater on the water-blocking plate 141, and the microcontroller controls the motor 132 based on this impact force data. Depending on the type of sensor, the acquired impact force data can be expressed as displacement data or pressure data. The following description uses specific embodiments as examples.

[0041] Example 1, such as Figure 3As shown, the sensor used in this embodiment is a distance sensor 150. The distance sensor 150 is fixedly installed inside the neutralization tank 110 near the outlet 112, and corresponds to the position of the end plate 145, i.e., the distance sensor 150 is located in the displacement path direction of the end plate 145. The distance sensor 150 is used to detect the distance between itself and the end plate 145 and transmits this distance signal to the microcontroller in real time. When the water-blocking plate 141 is displaced under the impact of wastewater, the end plate 145 moves synchronously with the water-blocking plate 141. The distance sensor 150 measures the change in the distance between itself and the end plate 145 in real time, thereby indirectly obtaining the displacement of the water-blocking plate 141, and thus reflecting the magnitude of the influent impact force. Based on this displacement data, the microcontroller sends corresponding control commands to the motor 132 to adjust the volume.

[0042] For the specific working principle of this embodiment, please refer to [link / reference]. Figure 5 The following comparison illustrates the two operating conditions.

[0043] Low inflow conditions: such as Figure 5 As shown in the upper part, when the influent flow rate is low, the wastewater flows smoothly out through the permeator 142 and enters the first regulating chamber 120. As the liquid level in the first regulating chamber 120 gradually rises, when the liquid level exceeds the top of the baffle 122, the wastewater overflows into the second regulating chamber 121. At this time, the regulating plate 130 is located in the upper middle part of the second regulating chamber 121, and the vertical distance between the regulating plate 130 and the outlet 112 is small. Therefore, the wastewater overflowing into the second regulating chamber 121 only needs to accumulate a small amount of water and reach a low liquid level before it can overflow and be discharged from the outlet 112 into the subsequent treatment equipment.

[0044] High inflow rate conditions: such as Figure 5 As shown in the lower part, when the influent flow rate increases, the flow capacity of the permeator 142 is insufficient to allow all the wastewater to pass through in time. The wastewater accumulates on the influent side of the baffle plate 141, increasing the impact force on the baffle plate 141. Under the impact force, the baffle plate 141 moves towards the second regulating chamber 121 and disengages from the influent 111. The return spring 146 is further stretched, and the end plate 145 moves synchronously with the baffle plate 141. At this time, the distance between the end plate 145 and the distance sensor 150 is recorded as L2. This distance is less than the distance L1 between the end plate 145 and the distance sensor 150 under the low influent flow condition. The distance sensor 150 detects that the end plate 145 is approaching and transmits this distance change signal to the microcontroller.

[0045] The microcontroller determines that the influent flow rate has increased based on the signal, and then controls the motor 132 to start, driving the regulating plate 130 to move downward. After the regulating plate 130 moves downward, the vertical distance between the regulating plate 130 and the outlet 112 increases, so that the wastewater overflowing into the second regulating chamber 121 needs to accumulate more water on the top of the regulating plate 130 and reach a higher liquid level before it can overflow and be discharged from the outlet 112, thereby avoiding the rapid outflow of wastewater in the regulating chamber.

[0046] Example 2, as Figures 6 to 8 As shown, the sensor used in this embodiment is a pressure sensor 170. The pressure sensor 170 is fixedly installed inside the neutralization tank 110 on the side near the outlet 112, and corresponds to the position of the end plate 145, that is, the pressure sensor 170 is located in the displacement path direction of the end plate 145. The pressure sensor 170 is used to detect the pressure data it receives and transmits the pressure signal to the microcontroller in real time.

[0047] Regarding the contact and engagement between the end plate 145 and the pressure sensor 170, the present invention provides an adjustment assembly 160 between the end plate 145 and the pressure sensor 170. For example... Figure 7 As shown, the adjustment assembly 160 includes a fixed plate 161 vertically fixed to the top of the adjustment plate 130, and movable plates 162 symmetrically arranged on both sides of the fixed plate 161. A sliding groove 163 is provided on the side of the movable plate 162 facing the fixed plate 161. The two movable plates 162 are detachably connected by bolts and fitted onto the outer periphery of the fixed plate 161. The width of the sliding groove 163 is greater than the width of the fixed plate 161, allowing the movable plates 162 to slide along the side wall of the fixed plate 161 towards the pressure sensor 170. To prevent the movable plates 162 from sliding upwards, multiple protruding ribs 165 are provided on the side wall of the fixed plate 161. The protruding ribs 165 slide in cooperation with the grooves on the side wall of the sliding groove 163, restricting the movable plates 162 to slide only in the horizontal direction.

[0048] To restrict the position of the water-blocking plate 141, a protruding protrusion 166 is provided on the lower side of the movable plate 162 near the end plate 145. The top of the protrusion 166 is connected to the side wall of the movable plate 162 via a slope 167. Furthermore, a stop rod 147 is fixedly provided at one end of the end plate 145, and the stop rod 147 abuts against the side wall of the movable plate 162 facing the end plate 145.

[0049] For the specific working principle of this embodiment, please refer to [link / reference]. Figure 8Under normal conditions, when the inflow is small, the abutment 147 rests against the end of the protrusion 166, and the water-blocking plate 141 pushes the moving plate 162 through the straight rod 143, the end plate 145, and the abutment 147. Since the width of the chute 163 is greater than the width of the fixed plate 161, a movable cavity 164 is formed between the moving plate 162 and the fixed plate 161, allowing the moving plate 162 to move towards the pressure sensor 170. Therefore, the abutment 147 can push the moving plate 162 to contact the pressure sensor 170. However, because the impact force exerted by the wastewater on the water-blocking plate 141 is small, the pressure value detected by the pressure sensor 170 is low.

[0050] When the influent flow rate increases, the impact force of the wastewater on the baffle plate 141 increases, and the pressure on the pressure sensor 170 also increases accordingly, resulting in a higher detected pressure value. Based on this pressure signal, the microcontroller determines that the influent flow rate has increased and immediately controls the motor 132 to start. The motor 132, via the lead screw 131, drives the adjusting plate 130 downwards, increasing the effective volume of the second regulating chamber 121. Simultaneously, the downward movement of the adjusting plate 130 causes the fixed plate 161 and the moving plate 162 to move downwards synchronously. The protrusion 166 gradually moves to a position below the stop rod 147, whereby the stop rod 147 is no longer obstructed by the protrusion 166, and a gap is formed between the end of the stop rod 147 and the side wall of the moving plate 162. At this point, the baffle plate 141 can continue to slide towards the second regulating chamber 121 under the push of the wastewater and slide out of the end of the inlet 111, avoiding affecting the drainage performance of the inlet 111 under high influent flow rates.

[0051] When the water flow decreases, the microcontroller controls the motor 132 to drive in reverse according to the pressure reduction signal detected by the pressure sensor 170, so that the lead screw 131 drives the regulating plate 130 to move upward, reducing the effective volume of the second regulating chamber 121 and restoring the working state under low flow conditions. At the same time, during the upward movement, the side wall of the moving plate 162 also pushes the water blocking plate 141 back into the water inlet 111 through the abutment rod 147.

[0052] In this embodiment, a reset spring 146 can be selectively provided between the end of the end plate 145 and the sliding seat 144 according to the actual working conditions. That is, the reset spring 146 is provided when needed to achieve the elastic reset function, and the structure can be omitted when not needed. Whether to set it or not depends on the actual needs.

[0053] It is worth noting that the downward movement of the adjusting plate 130 driven by the microcontroller-controlled motor 132 has a good matching relationship with the impact force state of the end plate 145. That is, the downward movement of the adjusting plate 130 can dynamically follow and adjust according to the impact force state of the water blocking plate 141. The specific matching value can be flexibly set according to the actual working conditions and treatment requirements to take into account the residence time adjustment requirements under different water volume fluctuation amplitudes.

[0054] Based on this, such as Figure 9 and Figure 10 As shown, in this embodiment, the water inlet 142 is configured as an elongated structure and positioned in the middle of the water-blocking plate 141. A portion of the bottom of the water-blocking plate 141 is cut off to form a contraction section 148. Thus, the portion of the water-blocking plate 141 located between the water inlet 142 and the contraction section 148 naturally forms a water-proof section 149. (Reference) Figure 11 A dosing port 180 is provided at the top of the inlet 111 on the side of the water baffle 141 near the first regulating chamber 120. The dosing port 180 is connected to the dosing pipe 103, so that the agent can flow into the inlet 111 through the dosing port 180.

[0055] Based on the above structure, its working process is as follows: When the inlet flow rate in the inlet 111 is low, the wastewater mainly flows into the first regulating chamber 120 through the channel at the bottom of the contraction section 148. The liquid flow is stable and the impact on the water blocking plate 141 is small.

[0056] When the water flow into inlet 111 increases, but the increase is small, the microcontroller controls the regulating plate 130 to move down only a small distance based on the impact force signal. This appropriately increases the volume of the second regulating chamber 121 and adjusts the residence time of the wastewater in the regulating chamber. On the other hand, because the downward movement of the regulating plate 130 is small, the protrusion 166 remains at the end position of the abutment 147, and the abutment 147 is still blocked by the protrusion 166, so the water blocking plate 141 will not fall out of inlet 111.

[0057] Under this operating condition, the wastewater flows in two streams: one part flows through the space below the contraction section 148, forming a lower water body 200 at the bottom of the inlet 111; the other part flows out from the permeator 142. Simultaneously, the reagent falls from the top of the inlet 111 through the dosing port 180, first contacting and mixing with the wastewater flowing out from the permeator 142. Subsequently, due to the presence of the water-blocking section 149, there is a height difference between the liquid discharged from the permeator 142 and the lower water body 200. The liquid discharged from the permeator 142 carries the reagent and falls directly into the middle region of the lower water body 200 under gravity. This impact causes the reagent to no longer remain only on the surface of the wastewater but to directly penetrate into the lower part of the water body, achieving pre-mixing of the reagent and wastewater within the inlet 111, thereby improving the efficiency of subsequent mixing after entering the first regulating chamber 120.

[0058] It should be understood that the height of the protrusion 166 can be flexibly adjusted according to actual working conditions. It is foreseeable that the higher the protrusion 166, the greater the downward movement of the adjusting plate 130 is required to disengage the stop rod 147 from the obstruction of the protrusion 166, thus allowing the water-blocking plate 141 to detach from the inlet 111. Therefore, by reasonably setting the height of the protrusion 166, the flow rate increase at which the water-blocking plate 141 detaches from the inlet 111 can be controlled to meet the usage requirements under different working conditions.

[0059] Finally, the controller of the PLC control cabinet inside the dosing mechanism 100 is communicatively connected to the sensor of the monitoring module. Taking the pressure sensor 170 in Example 2 as an example, its control logic is as follows: When the controller inside the PLC control cabinet receives pressure data detected by pressure sensor 170, an increase in this pressure indicates an increase in the influent flow. Without waiting for feedback from the pH sensor, the controller directly instructs the metering pump to increase the chemical supply rate, achieving rapid feedforward adjustment of the chemical dosage. Subsequently, when the pH sensor installed in the neutralization tank 110 detects a change in pH within the adjustment chamber, the controller performs a secondary calibration of the chemical dosage based on the measured value from the pH sensor to ensure the accuracy of the neutralization effect.

[0060] Through the aforementioned control strategy, the dosing mechanism 100 achieves rapid response in dosing volume by utilizing the pressure signal from the pressure sensor 170, closely following changes in water volume; and it also achieves precise correction of the dosing volume through the feedback signal from the pH sensor. The two mechanisms work together to ensure both adjustment speed and neutralization accuracy.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction wastewater pH adjustment and treatment device, comprising a neutralization tank (110) and a dosing mechanism (100) for adding neutralizing agents to the neutralization tank (110), wherein the neutralization tank (110) is provided with an inlet (111) and an outlet (112), characterized in that, The neutralization tank (110) is provided with a first regulating chamber (120) connected to the inlet (111) and a second regulating chamber (121) connected to the outlet (112), and wastewater enters the second regulating chamber (121) from the first regulating chamber (120); it also includes: A sensing mechanism (140) is provided at the water inlet (111). The sensing mechanism (140) has a contact part that comes into contact with the wastewater to withstand the impact of the wastewater. The monitoring module is used to acquire data on the impact force of wastewater on the sensing mechanism (140); The regulating mechanism (130) is vertically slidably disposed in the second regulating chamber (121). The regulating mechanism (130) is configured to adjust its position in the second regulating chamber (121) according to the impact force data, so as to change the effective volume of the second regulating chamber (121) and thereby adjust the residence time of wastewater in the neutralization tank (110). The dosing mechanism (100) uses the impact force data as a feedforward signal to adjust the dosage of the drug added to the neutralization tank (110) before the pH value changes in the neutralization tank (110).

2. The construction wastewater pH adjustment and treatment equipment according to claim 1, characterized in that, The first regulating chamber (120) and the second regulating chamber (121) are separated by a partition (122); the partition (122) is vertically arranged and its top height is lower than that of the neutralization tank (110) so that the liquid in the first regulating chamber (120) overflows into the second regulating chamber (121).

3. The construction wastewater pH adjustment and treatment equipment according to claim 1, characterized in that, The adjustment mechanism includes an adjustment plate (130) and a drive component for driving the adjustment plate (130) to rise and fall; The outer peripheral wall of the regulating plate (130) slides against the inner wall of the second regulating chamber (121) to divide the second regulating chamber (121) into an upper space and a lower space. When wastewater in the first regulating chamber (120) enters the second regulating chamber (121), the wastewater falls onto the top surface of the regulating plate (130).

4. The construction wastewater pH adjustment and treatment equipment according to claim 3, characterized in that, The driving component includes a vertically arranged lead screw (131), the bottom end of which rotates through the bottom of the neutralization tank (110) and is connected to a motor (132) installed at the bottom of the neutralization tank (110) for transmission, and the top end passes through an adjustment plate (130) and is threadedly connected to the adjustment plate (130).

5. The construction wastewater pH adjustment and treatment equipment according to claim 4, characterized in that, The inlet (111) extends to one side to form a tubular structure; The sensing mechanism (140) includes a water-blocking plate (141) located inside the water inlet (111), and a water-permeable port (142) is provided on the side wall of the water-blocking plate (141). A straight rod (143) is fixedly connected to one side of the water-blocking plate (141). One end of the straight rod (143) slides through a sliding seat (144). The sliding seat (144) is fixedly installed on the top of the partition plate (122). An end plate (145) is fixedly connected to one end of the straight rod (143) that passes through the sliding seat (144). A return spring (146) is provided between the end plate (145) and the side wall of the sliding seat (144).

6. The construction wastewater pH adjustment and treatment equipment according to claim 5, characterized in that, The monitoring module includes a microcontroller and a sensor that is communicatively connected to the microcontroller. The sensor is used to acquire the impact force data of wastewater on the water blocking plate (141). The microcontroller controls the motor (132) according to the impact force data. The sensor is located in the neutralization tank (110) on the side near the outlet (112) and corresponds to the position of the end plate (145).

7. The construction wastewater pH adjustment and treatment equipment according to claim 6, characterized in that, The sensor is a distance sensor (150), which is used to detect the distance between itself and the end plate (145) and transmit the distance signal to the microcontroller.

8. The construction wastewater pH adjustment and treatment equipment according to claim 6, characterized in that, The sensor is a pressure sensor (170). An adjustment component (160) is provided between the pressure sensor (170) and the end plate (145). The water blocking plate (141) contacts the pressure sensor (170) through the adjustment component (160). The pressure sensor (170) transmits the pressure signal generated by the contact to the microcontroller.

9. The construction wastewater pH adjustment and treatment equipment according to claim 8, characterized in that, The adjustment assembly (160) includes a fixed plate (161) vertically fixed to the top of the adjustment plate (130), and a movable plate (162) is slidably disposed on the side wall of the fixed plate (161). The movable plate (162) can slide along the side wall of the fixed plate (161) toward the pressure sensor (170). The moving plate (162) has a protrusion (166) on the side below the end plate (145), and the top of the protrusion (166) is connected to the side wall of the moving plate (162) by a slope (167). A stop bar (147) is fixedly provided at one end of the end plate (145), and the stop bar (147) abuts against the side wall of the moving plate (162) facing the end plate (145).

10. The construction wastewater pH adjustment and treatment equipment according to claim 8, characterized in that, The water inlet (142) is located in the middle of the water-blocking plate (141) and has a long strip structure; the bottom end of the water-blocking plate (141) is provided with a contraction part (148). The top of the inlet (111) is provided with a dosing port (180) on the side of the water baffle (141) near the first regulating chamber (120). The dosing port (180) is connected to the dosing mechanism (100), and the agent flows into the inlet (111) through the dosing port (180). When the wastewater passes through the permeator (142) and the contraction section (148), it is divided into upper and lower layers. The agent flows into the upper wastewater, and the upper wastewater falls into the middle of the lower wastewater under the action of gravity, so as to premix the agent and the wastewater.

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