Environment-friendly concrete mixing plant wastewater treatment device

Abstract

The application discloses an environment-friendly concrete mixing plant wastewater treatment device and belongs to the field of wastewater treatment. The device comprises a neutralizing mechanism, which comprises: a volume metering unit for obtaining the total volume of the wastewater; a pH value measuring unit for obtaining the initial pH value of the wastewater; a pH value target setting unit for setting the target pH value of the wastewater after neutralization; and a neutralizing reagent feeding unit for feeding the neutralizing reagent into the wastewater to neutralize the pH value of the wastewater. The volume metering unit is used for metering the amount of wastewater to be treated. After the volume of the wastewater is obtained, the pH value measuring unit detects the initial pH value of the wastewater. After the user sets the target pH value of the wastewater after neutralization through the pH value target setting unit, the neutralizing reagent feeding unit feeds the neutralizing reagent to neutralize the pH value of the wastewater. The efficiency of the wastewater treatment is improved, the waste of the neutralizing reagent is reduced, and the treatment cost is lowered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to an environment-friendly concrete mixing plant wastewater treatment device. BACKGROUND

[0002] With the gradual strengthening of environmental awareness, the problem of concrete mixing plant wastewater treatment has attracted more and more attention. A large amount of wastewater is generated in the production process of the concrete mixing plant. These wastewaters usually contain sand, gravel and other various solid impurities, and the wastewater generated by the mixing plant is usually alkaline. If it is directly discharged into the environment, it will not only pollute the water body, but also have a serious impact on the ecological system.

[0003] The traditional wastewater treatment method is not easy to accurately control the amount of neutralizing agent in the pH value adjustment, which leads to unstable pH value of the treated wastewater and is difficult to meet the discharge standard. SUMMARY

[0004] The purpose of the present application is to provide an environment-friendly concrete mixing plant wastewater treatment device, which solves the problem of inaccurate control of the amount of neutralizing agent in the prior art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: an environment-friendly concrete mixing plant wastewater treatment device, comprising a neutralizing mechanism, the neutralizing mechanism comprising:

[0006] A volume metering unit is used to obtain the total volume of the wastewater.

[0007] A pH value measuring unit is used to obtain the initial pH value of the wastewater.

[0008] A pH value target setting unit is used to set the target pH value of the wastewater after neutralization.

[0009] A neutralizing agent dosing unit is used to dose neutralizing agent into the wastewater to neutralize the pH value of the wastewater.

[0010] Wherein, the neutralizing agent amount dosing model of the neutralizing agent dosing unit is:

[0011] R=k*V*(pH2-pH1)

[0012] In the formula, R represents the amount of neutralizing agent, unit: kg; k represents the proportionality constant; V represents the volume of wastewater; pH2 represents the target pH value; pH1 represents the initial pH value.

[0013] Preferably, it further comprises a separation mechanism for separating cement slurry and sandstone in the wastewater.

[0014] The neutralizing mechanism further comprises a treatment box, a neutralizing tank and a temporary storage tank are arranged in the treatment box, and a transmission hole is communicated between the bottom of the neutralizing tank and the temporary storage tank;

[0015] The cement slurry separated by the separating mechanism enters the neutralizing tank through the temporary storage tank and the transmission hole in sequence.

[0016] Preferably, a floating plate is arranged in the neutralizing tank, and after the cement slurry enters the neutralizing tank;

[0017] The floating plate floats on the liquid surface of the cement slurry, and the volume metering unit obtains the total volume of the wastewater by obtaining the height of the floating plate.

[0018] Preferably, the neutralizing mechanism further comprises a stirring rod, both ends of the stirring rod are connected with first gears, and the inner wall of the neutralizing tank is symmetrically connected with straight racks meshing with the two first gears;

[0019] The stirring rod can slide transversely and reciprocally along the extension direction of the straight racks;

[0020] When the stirring rod slides transversely and reciprocally, the first gears roll on the straight racks, so that the stirring rod rotates.

[0021] Preferably, the neutralizing mechanism further comprises a hydraulic rod, a rotating frame is connected to the output end of the hydraulic rod, and the stirring rod rotates around a fixed shaft on the rotating frame;

[0022] A pH measuring probe is arranged on the rotating frame.

[0023] Preferably, the neutralizing mechanism further comprises a reagent metering box, a pneumatic cylinder is fixedly arranged on the upper portion of the reagent metering box, an extraction plate is connected to the output end of the pneumatic cylinder, and the side wall of the extraction plate is attached to the inner wall of the metering box;

[0024] A reagent extraction pipe and a reagent discharge pipe are connected to the bottom wall of the metering box, the reagent extraction pipe is connected to an external neutralizing reagent supply, the reagent discharge pipe is communicated with the neutralizing tank, and a one-way valve is arranged on each of the reagent extraction pipe and the reagent discharge pipe;

[0025] When the volume metering unit obtains the total volume of the wastewater in the neutralizing tank, the pneumatic cylinder contracts and drives the extraction plate to move upward to a position where the corresponding amount of neutralizing reagent is extracted from the metering box.

[0026] Preferably, the separating mechanism comprises a filter screen hinged to the top of the temporary storage tank, an arc-shaped telescopic rod is connected between the filter screen and the treatment box, a spring is sleeved on the arc-shaped telescopic rod, and both ends of the spring abut against the filter screen and the treatment box, respectively.

[0027] The upper part of the processing box is connected with a flow guide groove, and the initial wastewater containing cement paste and sandstone flows to the filter screen through the flow guide groove;

[0028] When the sandstone in the wastewater is impacted by gravity on the filter screen, the arc-shaped telescopic rod is telescoped;

[0029] When the telescoping frequency of the arc-shaped telescopic rod is reduced to disappear, the volume metering unit is started and the total volume of the wastewater in the neutralization tank is metered.

[0030] Preferably, the wastewater collecting mechanism further comprises a rotating disc, and a nozzle is hinged to the rotating disc;

[0031] When the rotating disc rotates, the nozzle can be annularly sprayed to the equipment to be cleaned;

[0032] When the rotating disc rotates one round, the nozzle swings once towards the vertical direction of the end surface of the rotating disc;

[0033] The wastewater generated after the equipment to be cleaned is cleaned flows to the flow guide groove.

[0034] Preferably, the nozzle comprises a first spray pipe, a hose and a second spray pipe, the hose is communicated between the first spray pipe and the second spray pipe, and the first spray pipe is hinged to the rotating disc;

[0035] The inner diameter of the hose is smaller than that of the first spray pipe and the second spray pipe;

[0036] A support is connected between the first spray pipe and the second spray pipe, a circular ring is rotatably connected to the support, the circular ring is sleeved on the hose, and when the nozzle swings, the circular ring rotates radially to extrude the hose so that the inner diameter of the hose is reduced.

[0037] Preferably, a mounting seat is connected to the processing box, the rotating disc rotates in the mounting seat, an electric slide rod is connected to the mounting seat, the end surface of the electric slide rod is not connected with a connecting cylinder, a push ring is connected to the connecting cylinder, and the push ring is magnetically attracted to the support;

[0038] When the rotating disc rotates one round, the electric slide rod slides once towards the support, so that the push ring pushes the support to make the nozzle swing once towards the vertical direction of the end surface of the rotating disc;

[0039] An arc-shaped rack is connected to the rotating disc, and a second gear meshing with the arc-shaped rack is connected to the circular ring;

[0040] When the support is pushed, the second gear rolls along the arc-shaped rack, so that the circular ring rotates radially to extrude the hose.

[0041] Compared with the prior art, the application has the following beneficial effects:

[0042] 1、The application measures the amount of wastewater to be treated through the volume metering unit, detects the initial pH value of the wastewater after obtaining the volume of the wastewater, sets the target pH value after neutralization through the pH value target setting unit, and then the neutralizing agent feeding unit feeds the neutralizing agent to neutralize the pH value of the wastewater, so that accurate metering and feeding are adopted, the efficiency of wastewater treatment is improved, the waste of neutralizing agent is reduced, and the treatment cost is reduced.

[0043] 2、The application is provided with a separation mechanism, so that the sand and cement slurry in the wastewater are separated, the degree of complexity of manual operation is reduced, and the efficiency of wastewater treatment is improved.

[0044] 3、The application is provided with a wastewater collecting mechanism, so that the wastewater generated after the cleaning of the equipment to be cleaned can smoothly flow to the flow guide groove and then enter the subsequent treatment unit, so that the random discharge of wastewater and environmental pollution are avoided, and the environmental protection requirement is met. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is the overall structure of the application Figure 1 ;

[0046] Figure 2 is the overall structure of the application Figure 2 ;

[0047] Figure 3 is the structure of the neutralization tank in the application

[0048] Figure 4 is the structure of the metering box in the application

[0049] Figure 5 is the structure of the stirring rod in the application

[0050] Figure 6 is the structure of the filter screen in the application

[0051] Figure 7 is the structure of the mounting seat in the application

[0052] Figure 8 is the structure of the arc-shaped rack in the application

[0053] Figure 9 is the structure of the nozzle in the application

[0054] Figure 10 is the structure of the water inlet channel in the application

[0055] Figure 11 Structure diagram of the present application.

[0056] In the figure: 1, processing box; 101, metering box; 102, air cylinder; 103, extraction plate; 104, discharge pipe; 105, reagent extraction pipe; 106, one-way valve; 11, temporary storage pool; 12, transmission hole; 13, neutralization pool; 14, floating plate; 15, hydraulic rod; 16, rotating frame; 17, pH measurement probe; 18, stirring rod; 19, first gear; 191, straight rack; 2, sand and stone groove; 21, flow guide groove; 22, filter screen; 23, arc expansion rod; 24, spring; 3, mounting seat; 31, rotating disc; 311, water inlet channel; 32, water inlet pipe; 33, nozzle; 331, first spray pipe; 332, hose; 333, second spray pipe; 34, support; 35, ring; 36, second gear; 37, arc rack; 371, blocking block; 38, connecting cylinder; 381, push ring; 382, electric sliding rod; 39, position sensor. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0058] Embodiment one

[0059] Reference Figure 1 - Figure 11 The present application provides a technical solution: an environment-friendly concrete mixing plant wastewater treatment device, comprising a neutralization mechanism, the neutralization mechanism comprises: a volume metering unit for obtaining the total volume of the wastewater; a pH measurement unit for obtaining the initial pH value of the wastewater; a pH target setting unit for setting the target pH value of the neutralized wastewater; a neutralizing agent feeding unit for feeding a neutralizing agent into the wastewater to neutralize the pH value of the wastewater; wherein the neutralizing agent feeding unit has a neutralizing agent amount feeding model:

[0060] R=k*V*(pH2-pH1)

[0061] In the formula, R represents the amount of neutralizing agent, the unit is kg; k represents the proportionality constant; V represents the volume of wastewater; pH2 represents the target pH value; pH1 represents the initial pH value.

[0062] In use, the volumetric measurement unit measures the amount of wastewater to be treated. After obtaining the volume of wastewater, the pH measurement unit detects the initial pH value of the wastewater. After the user sets the target pH value of the neutralized wastewater through the pH target setting unit, the neutralizing agent dispensing unit dispenses the neutralizing agent to neutralize the pH value of the wastewater.

[0063] The testing step of the proportionality constant k includes:

[0064] S1. Collect a representative wastewater sample and measure its initial pH value (pH1).

[0065] S2. Determine the target pH value (pH2), which is the desired pH value after treatment.

[0066] S3. Prepare inorganic acid solutions of different concentrations as neutralizing agents.

[0067] S4. Add the same volume of wastewater sample to a series of containers.

[0068] S5. Monitor the pH value of the wastewater using a pH meter and gradually add inorganic acid solutions while stirring to ensure uniform mixing.

[0069] S6. Record the change in pH value after each addition of inorganic acid solution until the target pH value is reached or approached.

[0070] S7. Record the volume or mass of inorganic acid solution added in each experiment.

[0071] S8. Based on the experimental data, plot the relationship between wastewater volume (V), initial pH value (pH1), target pH value (pH2), and inorganic acid dosage.

[0072] S9. By observing and analyzing the data, find the relationship pattern between inorganic acid dosage and wastewater volume and pH value change.

[0073] S10. According to the relationship pattern, calculate the proportionality constant k.

[0074] S11. Repeat the experiment to verify the stability and reliability of the k value.

[0075] It should be noted that the composition of wastewater from a concrete mixing plant is generally stable, so the calculation of k value is not easily affected by different alkaline ions.

[0076] The separation mechanism is used to separate the cement slurry and sand and gravel in the wastewater. The neutralization mechanism further includes a treatment tank 1, which is provided with a neutralization tank 13 and a temporary storage tank 11. The bottom of the neutralization tank 13 and the temporary storage tank 11 is communicated with a transmission hole 12. The cement slurry separated by the separation mechanism passes through the temporary storage tank 11 and the transmission hole 12 into the neutralization tank 13 in sequence.

[0077] The separation mechanism filters out the sand and gravel in the wastewater, and the cement slurry enters the temporary storage tank in the treatment tank 1. The temporary storage tank 11 serves as a temporary storage area for the cement slurry, which can ensure that the cement slurry remains relatively stable during the treatment process. The bottom of the temporary storage tank 11 is connected to the neutralization tank 13 through the transmission hole 12, thereby ensuring that the liquid level in the neutralization tank 13 is consistent with that of the temporary storage tank 11. After the cement slurry enters the neutralization tank 13, the neutralization mechanism begins to work. According to the volume of wastewater V obtained by the volume measurement unit, the initial pH value pH1 measured by the pH value measurement unit, and the target pH value pH2 set by the pH value target setting unit, the neutralization reagent delivery unit determines the required amount of neutralization reagent R through the calculation model R = kV (pH2-pH1). Through accurate measurement and delivery, the neutralization mechanism can accurately adjust the pH value of the cement slurry, ensuring that the wastewater treatment effect meets the environmental protection emission standard.

[0078] The neutralization tank 13 is provided with a floating plate 14. After the cement slurry enters the neutralization tank 13, the floating plate 14 floats on the surface of the cement slurry. The volume measurement unit obtains the total volume of the wastewater by obtaining the height of the floating plate 14.

[0079] When the cement slurry enters the neutralization tank 13 through the temporary storage tank 11 and the transmission hole 12, the floating plate 14 will float on the surface of the cement slurry. Due to the buoyancy of the floating plate 14, it will move accordingly with the rise or fall of the cement slurry liquid level. The volume measurement is achieved by monitoring the height change of the floating plate 14 to determine the total volume of the wastewater. The neutralization tank 13 is a regular rectangle, and the height of the floating plate 14 rising is the height of the rectangle containing the cement slurry. Specifically, the volume measurement unit includes a sensor that can detect the position or height of the floating plate 14 in real time and convert it into volume data of the wastewater. Data transmission and processing: the volume measurement unit obtains the height data of the floating plate 14 and transmits these data to the control system. The control system will convert the height data into the total volume V of the wastewater according to the preset algorithm. By using the buoyancy principle and height change of the floating plate 14 to measure the volume of the wastewater, more accurate and real-time volume measurement is achieved.

[0080] The neutralization mechanism also includes a stirring rod 18, both ends of which are connected to a first gear 19. The inner wall of the neutralization tank 13 is symmetrically connected to a straight rack 191 that engages with the two first gears 19. The stirring rod 18 can slide transversely along the extension direction of the straight rack 191. When the stirring rod 18 slides transversely, the first gear 19 rolls on the straight rack 191, thereby causing the stirring rod 18 to rotate.

[0081] The two ends of the stirring rod 18 are connected with first gears 19, which can be closely meshed with the symmetrical connected straight racks 191 on the inner wall of the neutralization tank 13, so as to ensure that the stirring rod 18 can keep stable when moving and can rotate by the interaction of the gears and the straight racks 191. The stirring rod 18 can slide laterally along the extension direction of the straight racks 191, which expands the stirring range of the stirring rod 18 and makes the ion concentration of each part of the wastewater balanced, so as to improve the accuracy of the pH measurement of the wastewater.

[0082] The neutralization mechanism further comprises a hydraulic rod 15, the output end of the hydraulic rod 15 is connected with a rotating frame 16, and the stirring rod 18 is pivotally arranged on the rotating frame 16. The rotating frame 16 is provided with a pH measurement probe 17.

[0083] The hydraulic rod 15 serves as a power source, and its output end is connected with the rotating frame 16. When the hydraulic rod 15 extends or retracts, it can push the rotating frame 16 to move or adjust accordingly, so as to change the position of the stirring rod 18. The rotating frame 16 is provided with a pH measurement probe 17, which can monitor the pH value of the wastewater in real time. The pH measurement probe 17 contacts the wastewater sample and obtains the current pH value data every certain period of time. Finally, the average value of these data is calculated and recorded as pH1, and these data are transmitted to the control system.

[0084] The neutralization mechanism further comprises a reagent metering tank 101, the upper part of the reagent metering tank 101 is fixedly provided with a cylinder 102, the output end of the cylinder 102 is connected with a drawing plate 103, and the side wall of the drawing plate 103 is attached to the inner wall of the metering tank 101. The bottom wall of the metering tank 101 is connected with a reagent drawing pipe 105 and a reagent discharge pipe 104. The reagent drawing pipe 105 is connected to an external neutralization reagent supply, and the reagent discharge pipe 104 is connected to the neutralization tank 13. A one-way valve 106 is arranged on the reagent drawing pipe 105 and the reagent discharge pipe 104. When the volume metering unit obtains the total volume of the wastewater in the neutralization tank 13, the cylinder 102 retracts and drives the drawing plate 103 to move upward to the position where the corresponding amount of neutralization reagent is drawn from the metering tank 101.

[0085] The reagent metering tank 101 is used to store neutralizing reagent, the upper part of which is fixed with a cylinder 102, the output end of which is connected with a suction plate 103, the side wall of which is closely combined with the inner wall of the metering tank 101, so that the suction plate 103 can move upward in the metering tank 101 under the drive of the cylinder 102, thereby controlling the suction amount of the neutralizing reagent, the bottom wall of the metering tank 101 is connected with a reagent suction pipe 105 and a reagent discharge pipe 104, the reagent suction pipe 105 is connected with an external neutralizing reagent supply for sucking the neutralizing reagent into the metering tank 101, and the reagent discharge pipe 104 is communicated with the neutralizing tank 13 for discharging the metered neutralizing reagent into the neutralizing tank 13, the setting of the one-way valve 106 ensures the flow direction of the reagent and prevents the occurrence of reverse flow phenomenon, when the total volume of the wastewater in the neutralizing tank 13 is obtained by the volume metering unit, the control system calculates the required amount of the neutralizing reagent and sends instructions to the cylinder 102, the cylinder 102 contracts according to the instructions and drives the suction plate 103 to move upward to the corresponding position in the metering tank 101, which is accurately set according to the required amount of the neutralizing reagent, thereby ensuring that the suction amount of the neutralizing reagent matches the volume of the wastewater.

[0086] The separation mechanism comprises a filter screen 22 hinged to the top of the temporary storage tank 11, an arc-shaped telescopic rod 23 connected between the filter screen 22 and the treatment tank 1, a spring 24 sleeved on the arc-shaped telescopic rod 23, and the two ends of the spring 24 respectively abutting against the filter screen 22 and the treatment tank 1; the upper part of the treatment tank 1 is connected with a flow guide groove 21, the initial wastewater containing cement slurry and sandstone flows to the filter screen 22 after being guided by the flow guide groove 21; when the sandstone in the wastewater is impacted by gravity on the filter screen 22, the arc-shaped telescopic rod 23 telescopes; when the telescoping frequency of the arc-shaped telescopic rod 23 reduces to disappear, the volume metering unit starts and meters the total volume of the wastewater in the neutralizing tank 13.

[0087] The upper part of the treatment tank 1 is connected with a flow guide groove 21, the initial wastewater flows to the filter screen 22 after being guided by the flow guide groove 21, the design of the flow guide groove 21 can ensure that the wastewater uniformly flows to the filter screen 22, and the setting of the flow guide groove 21 can lift the height of the discharge end of the wastewater, thereby ensuring that the sandstone contained in the wastewater has sufficient kinetic energy to impact on the filter screen 22; during the process that the sandstone in the wastewater generated by the washing and stirring station impacts on the filter screen 22, the sandstone will continuously impact on the filter screen 22, at this time the arc-shaped telescopic rod 23 will continuously telescope, with the progress of the washing, the sandstone on the washed equipment is gradually washed away until there is none, at this time the telescoping frequency of the arc-shaped telescopic rod 23 will gradually reduce until disappear, when the arc-shaped telescopic rod 23 no longer telescopes, it indicates that the equipment has been washed clean, at this time the wastewater generated by the washing equipment can be treated;

[0088] In addition, when the sandstone impacts on the filter screen 22, the spring 24 will exert a counterforce on the sandstone, so that the filter screen 22 swings at this time to make the sandstone be bounced into the sandstone groove 2 on the ground for collection.

[0089] The wastewater collecting mechanism comprises a rotating disc 31 and a nozzle 33 hinged to the rotating disc 31; the nozzle 33 can spray in a ring shape when the rotating disc 31 rotates; the nozzle 33 swings once in a vertical direction of the end surface of the rotating disc 31 when the rotating disc 31 rotates one round; and the wastewater generated after the cleaning of the equipment to be cleaned flows to the guide groove 21.

[0090] In the initial state, the nozzle 33 is inclined to the end surface of the rotating disc 31; the rotating disc 31 can drive the nozzle 33 to revolve when the rotating disc 31 rotates, so that the nozzle 33 sprays in a ring shape on the inner wall of the mixing drum of the concrete mixing equipment; when the rotating disc 31 rotates one round, the nozzle 33 sprays in a ring shape on the inner wall of the mixing drum for one round, at this time, the nozzle 33 swings once in a vertical direction of the end surface of the rotating disc 31, so that the spraying angle of the nozzle 33 is changed; at this time, the nozzle 33 can spray and clean the inner wall of the mixing drum deeper, and the wastewater generated after the cleaning of the mixing equipment is collected through the guide groove 21.

[0091] The nozzle 33 comprises a first spray pipe 331, a hose 332 and a second spray pipe 333; the hose 332 is connected between the first spray pipe 331 and the second spray pipe 333; the first spray pipe 331 is hinged to the rotating disc 31; the inner diameter of the hose 332 is smaller than that of the first spray pipe 331 and the second spray pipe 333; a bracket 34 is connected between the first spray pipe 331 and the second spray pipe 333; a circular ring 35 is rotatably connected to the bracket 34; the circular ring 35 is sleeved on the hose 332; when the nozzle 33 swings, the circular ring 35 rotates radially to press the hose 332 so as to reduce the inner diameter of the hose 332.

[0092] When the nozzle 33 swings in a vertical direction of the end surface of the rotating disc 31, the circular ring 35 rotates radially to press the hose 332, so that the inner diameter of the hose 332 is reduced, which will cause the fluid pressure through the hose 332 to increase; according to Bernoulli's equation, when the fluid flows in the pipeline, the increase of the speed will cause the decrease of the pressure, and vice versa; therefore, when the inner diameter of the hose 332 is reduced, the speed of the fluid will increase, so as to increase the spraying intensity; specifically, when the nozzle 33 swings to increase the spraying distance, the circular ring 35 will also correspondingly rotate radially to press the hose 332; the pressing action increases the resistance of the fluid passing through the hose 332, so as to increase the pressure of the fluid; since the inner diameters of the first spray pipe 331 and the second spray pipe 333 are large, they can accommodate higher fluid pressure, and convert the pressure into stronger spraying intensity; therefore, with the increase of the spraying distance, the spraying intensity will also increase synchronously.

[0093] The processing box 1 is connected with a mounting seat 3, a rotating disc 31 rotates in the mounting seat 3, the mounting seat 3 is connected with an electric slide rod 382, the end surface of the electric slide rod 382 is not connected with a connecting cylinder 38, the connecting cylinder 38 is connected with a push ring 381, the push ring 381 is magnetically attracted to the support 34; when the rotating disc 31 rotates one circle, the electric slide rod 382 slides to the direction of the support 34 once, so that the push ring 381 pushes the support 34 to make the nozzle 33 swing one time to the vertical direction of the end surface of the rotating disc 31; the rotating disc 31 is connected with an arc-shaped rack 37, the circular ring 35 is connected with a second gear 36 meshing with the arc-shaped rack 37; when the support 34 is pushed, the second gear 36 rolls along the arc-shaped rack 37, so that the circular ring 35 rotates radially to extrude the hose 332.

[0094] The rotating disc 31 is connected with a water inlet pipe 32 rotatingly, which ensures that the rotation of the rotating disc 31 is not interfered, the rotating disc 31 can be driven to rotate by a motor, the inside of the rotating disc 31 is provided with a water inlet channel 311 matched with the water inlet pipe 32, the nozzle 33 is communicated with the water inlet channel 311, the position sensor 39 on the mounting seat 3 monitors the rotation circle number of the rotating disc 31, when it is detected that the rotating disc 31 rotates one circle, the electric slide rod 382 slides to the direction of the support 34, at this time, the push ring 381 moves synchronously and pushes the support 34, so that the support 34 drives the nozzle 33 to swing to the vertical direction of the end surface of the rotating disc 31, at this time, the second gear 36 on the circular ring 35 connected with the support 34 can roll on the arc-shaped rack 37, so that the circular ring 35 rotates radially to extrude the hose 332 at this time, the both ends of the arc-shaped rack 37 are connected with a blocking block 371, which limits the rolling stroke of the second gear 36 and prevents the second gear 36 from being separated from the contact with the arc-shaped rack 37.

[0095] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly concrete mixing plant wastewater treatment device, characterized by: The neutralization mechanism comprises: a volume metering unit for obtaining the total volume of the wastewater; a pH value measuring unit for obtaining the initial pH value of the wastewater; a pH value target setting unit for setting the target pH value of the neutralized wastewater; a neutralizing agent feeding unit for feeding a neutralizing agent into the wastewater to neutralize the pH value of the wastewater; wherein the neutralizing agent feeding amount calculation model of the neutralizing agent feeding unit is: R=k*V*(pH2-pH1) wherein R represents the amount of neutralizing agent, k represents the proportionality constant, V represents the volume of wastewater, pH2 represents the target pH value, and pH1 represents the initial pH value; The neutralization mechanism further comprises a treatment box (1), the upper part of the treatment box (1) is connected with a flow guide groove (21), and further comprises a wastewater collecting mechanism, the wastewater collecting mechanism comprises a rotating disc (31), and a nozzle (33) is hinged to the rotating disc (31); When the rotating disc (31) rotates, the nozzle (33) can be annularly sprayed on the equipment to be cleaned; When the rotating disc (31) rotates one round, the nozzle (33) swings once in the direction perpendicular to the end face of the rotating disc (31); The wastewater generated after the equipment to be cleaned is cleaned flows to the flow guide groove (21); The nozzle (33) comprises a first spray pipe (331), a hose (332) and a second spray pipe (333), the hose (332) is connected between the first spray pipe (331) and the second spray pipe (333), and the first spray pipe (331) is hinged to the rotating disc (31); The inner diameter of the hose (332) is smaller than that of the first spray pipe (331) and the second spray pipe (333); A support (34) is connected between the first spray pipe (331) and the second spray pipe (333), a circular ring (35) is rotatably connected to the support (34), the circular ring (35) is sleeved on the hose (332), and when the nozzle (33) swings, the circular ring (35) rotates radially to press the hose (332) so that the inner diameter of the hose (332) decreases; An installation seat (3) is connected to the treatment box (1), the rotating disc (31) rotates in the installation seat (3), an electric slide rod (382) is connected to the installation seat (3), the end face of the electric slide rod (382) is not connected with a connecting cylinder (38), the connecting cylinder (38) is connected with a pushing ring (381), and the pushing ring (381) is magnetically attracted to the support (34); When the rotating disc (31) rotates one round, the electric slide rod (382) slides once in the direction of the support (34), so that the pushing ring (381) pushes the support (34) to make the nozzle (33) swing once in the direction perpendicular to the end face of the rotating disc (31); An arc-shaped rack (37) is connected to the rotating disc (31), and a second gear (36) meshing with the arc-shaped rack (37) is connected to the circular ring (35); When the support (34) is pushed, the second gear (36) rolls along the arc-shaped rack (37), so that the circular ring (35) rotates radially to extrude the hose (332).

2. The environmentally friendly concrete mixing plant wastewater treatment device according to claim 1, characterized in that: The separation mechanism is further used for separating the cement slurry and sandstone in the wastewater; The treatment box (1) is provided with a neutralization tank (13) and a temporary storage tank (11), and the bottom of the neutralization tank (13) and the temporary storage tank (11) is communicated with a transmission hole (12); The cement slurry separated by the separation mechanism enters the neutralization tank (13) through the temporary storage tank (11) and the transmission hole (12) in sequence.

3. The environmentally friendly concrete mixing plant wastewater treatment device according to claim 2, characterized in that: The neutralization tank (13) is provided with a floating plate (14), and after the cement slurry enters the neutralization tank (13); The floating plate (14) floats on the cement slurry liquid surface, and the volume metering unit obtains the total volume of the wastewater by obtaining the height of the floating plate (14).

4. The environmentally friendly concrete mixing plant wastewater treatment device according to claim 3, characterized in that: The neutralization mechanism further comprises a stirring rod (18), both ends of the stirring rod (18) are connected with a first gear (19), and the inner wall of the neutralization tank (13) is symmetrically connected with a straight rack (191) engaged with the two first gears (19); The stirring rod (18) can reciprocate transversely along the extension direction of the straight rack (191); When the stirring rod (18) reciprocates transversely, the first gear (19) rolls on the straight rack (191), so that the stirring rod (18) rotates.

5. The environmentally friendly concrete mixing plant wastewater treatment device according to claim 4, characterized in that: The neutralization mechanism further comprises a hydraulic rod (15), and the output end of the hydraulic rod (15) is connected with a rotating frame (16), and the stirring rod (18) rotates around the rotating frame (16). The rotating frame (16) is provided with a pH value measuring probe (17).

6. The environmentally friendly concrete mixing plant wastewater treatment device according to claim 5, characterized in that: The neutralization mechanism further comprises a reagent metering box (101), an air cylinder (102) is fixedly arranged on the upper portion of the reagent metering box (101), the output end of the air cylinder (102) is connected with a drawing plate (103), and the side wall of the drawing plate (103) is attached to the inner wall of the metering box (101); The bottom wall of the metering box (101) is connected with a reagent drawing pipe (105) and a reagent discharge pipe (104), the reagent drawing pipe (105) is connected to an external neutralization reagent supply, the reagent discharge pipe (104) is communicated with the neutralization tank (13), and the reagent drawing pipe (105) and the reagent discharge pipe (104) are both provided with a one-way valve (106); When the volume metering unit obtains the total volume of the wastewater in the neutralization tank (13), the air cylinder (102) contracts and drives the drawing plate (103) to move upward to the position of the metering box (101) for drawing a corresponding amount of neutralization reagent.

7. The environmentally friendly concrete mixing plant wastewater treatment device according to claim 6, characterized in that: The separation mechanism comprises a filter screen (22) hinged to the top of the temporary storage tank (11), an arc-shaped telescopic rod (23) connected between the filter screen (22) and the treatment box (1), a spring (24) sleeved on the arc-shaped telescopic rod (23), and the two ends of the spring (24) are respectively abutted against the filter screen (22) and the treatment box (1). The initial wastewater containing the cement slurry and sandstone is guided to the filter screen (22) through the guide groove (21); When the sandstone in the wastewater is impacted by gravity on the filter screen (22), the arc-shaped telescopic rod (23) is telescoped; When the telescoping frequency of the arc-shaped telescopic rod (23) is reduced to disappear, the volume metering unit is started and the total volume of the wastewater in the neutralization tank (13) is metered.

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