A monitoring and filtering device for the residual chlorine content at the reclaimed water replenishment port and its chlorine removal method

Abstract

The present invention discloses a residual chlorine content monitoring and filtering device for a reclaimed water inlet and a dechlorination method thereof, comprising a filter unit, a monitoring unit, and an air supply unit. The filter unit is axially plugged and fixed inside the drainage pipe of the reclaimed water inlet, with monitoring units fixed at both ends of the filter unit, and one end of the filter unit connected to the air supply unit. The filter unit comprises a cylindrical shell, a curved inclined plate, and an aeration chamber, wherein a plurality of curved inclined plates with holes are fixedly connected at intervals parallel to and obliquely to the interior of the cylindrical shell, and an aeration chamber connected to the air supply unit and the inner cavity of the cylindrical shell is axially fixed on the lower inner wall of the cylindrical shell; the curved inclined plate divides the inner cavity of the cylindrical shell into a plurality of inclined filter chambers, and the filter chambers are partially filled with filter particles. The device can be conveniently connected to a pipeline, and uses aeration and adsorption as dual means to filter residual chlorine in the water body, avoiding blockage of the water inlet, and is suitable for use in reclaimed water plants.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to a residual chlorine content monitoring and filtering device for a reclaimed water replenishment inlet and a chlorine removal method thereof. Background Art

[0002] Chlorine disinfection is simple to use, low-cost, mature, and consistently effective. Residual chlorine concentrations are easily measured, making it the most economical, effective, and widely used water disinfection method since its introduction. Reclaimed water plants typically test total chlorine and free residual chlorine levels at the outlet of the clear water tank. If these levels are below the effluent standard, chlorine addition is performed. If the residual chlorine level at the end of the pipe network is greater than or equal to 0.2 mg / L, chlorine dosage should be reduced.

[0003] However, in reality, recycled water quality is complex, with significant fluctuations in the content of its components. The water also contains numerous substances that react with chlorine, each with its own distinct properties. To ensure that the initial chlorine addition at the water plant produces a sufficient residual chlorine concentration after a certain period of contact to maintain disinfection effectiveness, the amount of chlorine pre-dosed before entering the pipe network is often high, even to the point where the water at the pipe network's end-of-line water outlet exceeds the reclaimed water standard.

[0004] However, excessive residual chlorine is obviously harmful to the human body and the natural world. The necessity of reducing residual chlorine emissions mainly includes the following points:

[0005] 1. The residual chlorine content of the water outlet at the end of the pipe network is higher than the reclaimed water outlet standard. Once it enters the natural water body, it will cause harm to the organisms in the water body and should be removed according to the standard regulations;

[0006] 2. When residual chlorine enters natural water bodies, it will react with substances in the water to produce a large number of chlorination disinfection by-products, such as trihalomethanes and haloacetic acids. These substances are closely related to human cancer mortality, so it is very necessary to eliminate residual chlorine before entering the water body;

[0007] 3. Currently, there are no targeted facilities and equipment or suitable methods on the market to solve the problem of high residual chlorine at the outlet and replenishment outlet of the reclaimed water plant.

[0008] Through public search, the following related patents were found:

[0009] CN204434340U discloses a contact disinfection pool outlet residual chlorine control device, including a residual chlorine sensor arranged at the outlet of the contact disinfection pool. The residual chlorine sensor is respectively connected to the input ends of four outlet residual chlorine control devices arranged on the outer wall of the outlet and the outer wall of the control channel. The control end of each outlet residual chlorine control device is respectively connected to a corresponding gate. During operation, the residual chlorine sensor collects the residual chlorine content at the outlet of the contact disinfection pool and transmits the collected data to the outlet residual chlorine control device. If the residual chlorine is greater than a preset value, the gate on the control channel wall is selectively opened to extend the residence time of the sewage in the pool; if the residual chlorine is slightly less than or equal to the preset value, the gate at the outlet is opened to allow the sewage to flow out; if the residual chlorine is far below the preset value, the chlorine dosing device at the outlet is controlled to perform chlorination treatment to ensure an appropriate amount of residual chlorine in the outlet pipe. This utility model can reduce the impact of the outlet residual chlorine on the receiving water body and has the advantages of long service life and strong practicality.

[0010] After analysis, the residual chlorine control device in the above-mentioned patent has significant differences from the present application in terms of the structure and function of residual chlorine detection and filtration, and therefore does not affect the novelty of the present application. Summary of the Invention

[0011] The purpose of the present invention is to overcome the shortcomings of the existing methods and provide a residual chlorine content monitoring and filtering device for a reclaimed water replenishment port and a dechlorination method thereof. The device is designed for the reclaimed water outlet replenishment port and can be conveniently connected to the pipeline. It uses aeration and adsorption as dual means to filter the residual chlorine in the water body, and minimizes the head loss in the pipeline to avoid blockage of the replenishment port. The device is suitable for widespread use in reclaimed water plants.

[0012] A filter device for monitoring the residual chlorine content at a reclaimed water replenishment inlet comprises a filter unit, a monitoring unit and an air supply unit, wherein the filter unit is axially plugged and fixed inside the drain pipe of the reclaimed water replenishment inlet, monitoring units are fixed at both ends of the filter unit, and one end of the filter unit is connected to the air supply unit; the filter unit comprises a cylindrical shell, a curved inclined plate and an aeration cavity, wherein a plurality of curved inclined plates with holes are fixedly connected at intervals in parallel and obliquely to the interior of the cylindrical shell, and an aeration cavity connected to the air supply unit and the inner cavity of the cylindrical shell is axially fixed on the lower inner wall of the cylindrical shell; the curved inclined plate divides the inner cavity of the cylindrical shell into a plurality of inclined filter cavities, and the filter cavities are partially filled with filter particles powered by water flow, aeration and gravity and limited by the curved inclined plate and the inner wall of the cylindrical shell.

[0013] Moreover, the aeration chamber includes an air chamber, an air distribution chamber and a breathable rubber membrane, wherein the air chamber is a semi-cylindrical structure, the air chamber extends axially and covers the lower half of the inner cavity of the overall cylindrical shell, the circumferential outer wall of the air chamber is fixedly connected to the circumferential inner wall of the lower part of the cylindrical shell, and a plurality of air distribution chambers are arranged and connected on the circumferential inner wall of the air chamber, and a breathable rubber membrane is compositely bonded on the inner arc surface composed of the plurality of air distribution chambers; the air distribution chamber is connected to the inner gas of the filter chamber in a one-way manner through the breathable rubber membrane.

[0014] Moreover, the curved inclined plate is tilted and fixed inside the cylindrical shell, the top of the curved inclined plate is close to the water inlet end of the cylindrical shell, the bottom of the curved inclined plate is close to the drainage end of the cylindrical shell, the concave curved surface of the curved inclined plate faces the water inlet end of the cylindrical shell, and a plurality of diamond-shaped sieve holes are penetrated on the curved surface of the curved inclined plate.

[0015] Moreover, the filter particles include calcium sulfite particles and activated carbon particles, and the calcium sulfite particles and the activated carbon particles are alternately filled in two adjacent filter cavities.

[0016] Moreover, the air supply unit includes a connected compressor and an air storage tank, wherein the exhaust end pipeline of the compressor is connected to the air storage tank, and a pressure gauge is provided on the pipeline; the exhaust end pipeline of the air storage tank is connected to one end of the air chamber in the aeration cavity, and a solenoid valve is provided on the pipeline.

[0017] Moreover, the monitoring unit includes a probe protective shell, a residual chlorine monitoring probe and a data storage and sending module, wherein the probe protective shell is radially fixed on the inner walls at both ends of the cylindrical shell, the residual chlorine monitoring probe is fixed in the probe protective shell, the data storage and sending module is fixed on the top of the probe protective shell, and the inner cavity of the probe protective shell is connected to the inner cavity of the cylindrical shell; the residual chlorine monitoring probe is electrically connected to the data storage and sending module.

[0018] Moreover, multiple inner support rings are coaxially fixedly connected to the inside of the drainage pipe of the regenerated water replenishment port; multiple outer retaining rings that cooperate with the inner support rings to axially limit the cylindrical shell are fixedly connected to the circumferential outer wall of the cylindrical shell.

[0019] A method for dechlorination of a residual chlorine content monitoring and filtering device for a reclaimed water replenishment port comprises the following steps:

[0020] Step 1: Preparation: First, determine the diameter of the drainage pipe for the reclaimed water inlet, select a cylindrical shell with a diameter that matches the pipe diameter, and rotate the cylindrical shell in a circular direction so that the high end of the curved inclined plate faces the water inlet end of the cylindrical shell and the low end of the curved inclined plate faces the drainage end of the cylindrical shell. At this point, the cylindrical shell is alternately filled with calcium sulfite granules and activated carbon granules.

[0021] Step 2: The front and rear residual chlorine detectors monitor the corresponding residual chlorine levels, and the two detectors can calibrate each other to ensure normal operation of the detectors and obtain accurate and reliable data. The residual chlorine detector stores the data in real time in the memory IC and uploads the data to the host computer via the GPRS signal upload module in real time. The host computer records the received residual chlorine data and the current detection time, and obtains the total amount of residual chlorine in the outflow of the reclaimed water replenishment outlet through comprehensive calculation.

[0022] Step 3: When the residual chlorine content L1 of the incoming water detected by the front residual chlorine detector is higher than the set upper limit value LM, the data value is stored in the memory IC, and the data is uploaded to the host computer in real time through the GPRS signal upload module; the processor sends a command to the solenoid valve, the solenoid valve is turned on, and the gas in the gas tank enters the gas pipe. After entering the gas chamber, the gas enters the gas distribution chamber respectively, which can evenly distribute the gas. After the gas passes through the rubber membrane, the pressure drops rapidly to form extremely fine microporous bubbles, which float up quickly, disturb the water body, and drive the movement of calcium sulfite particles and activated carbon particles. On the one hand, the gas in the bubbles can carry Cl2 out of the water body, and on the other hand, it can promote the full contact between calcium sulfite particles and activated carbon particles and Cl2 in the water body, thereby achieving the purpose of eliminating residual chlorine;

[0023] When the residual chlorine content L2 of the incoming water detected by the post-residual chlorine detector is lower than the set standard value LN, the data is stored in the memory IC and uploaded to the host computer in real time through the GPRS signal upload module; the processor sends a command to the solenoid valve, the solenoid valve is closed, the gas in the gas tank stops entering the gas pipeline, and the compressor stops working;

[0024] Step 4: During the operation of the dechlorination device, the residual chlorine amount monitored by the front and rear residual chlorine detectors is combined with the monitoring time recorded by the host computer to accurately calculate the flow dechlorination amount.

[0025] The advantages and technical effects of the present invention are:

[0026] The present invention discloses a residual chlorine content monitoring and filtering device for a regenerated water inlet and a dechlorination method thereof, which are designed for the regenerated water inlet, can be conveniently connected to a pipeline, and minimize the head loss in the pipeline to avoid clogging of the inlet; calcium sulfite particles and activated carbon particles can be added alternately, and the filling particles can be replaced, with stable effect, simple operation and convenient maintenance; aeration turbulence technology, chemical absorption technology and particle adsorption technology are combined to improve and promote each other, thereby enhancing the residual chlorine filtering effect; the inclined filter chamber structure can firstly increase the contact area between the bottom aeration bubbles and the filling particles, provide greater buoyancy for the filling particles, and combine with the impact force of the water flow to make the filling particles move violently, so as to better contact with the residual chlorine in the water body; secondly, when the dechlorinator is not working, the filling particles are prevented from being completely spread on the inner wall of the cylindrical shell or the curved inclined plate, thereby losing water head and causing pipeline clogging; the real-time feedback function of the residual chlorine monitoring probe can instantly understand the residual chlorine content of the inlet and outlet water of the dechlorinator, quickly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a connection diagram of the present invention;

[0028] Figure 2 A side view of the cylindrical housing of the present invention;

[0029] Figure 3 is a cross-sectional view of the cylindrical shell of the present invention;

[0030] Figure 4 is a cross-sectional view of the monitoring unit of the present invention;

[0031] Figure 5 Schematic diagram of the structure of the inner support clamp in the present invention;

[0032] Figure 6 Schematic diagram of the partial structure of the curved inclined plate in the present invention;

[0033] Figure 7 This is a schematic diagram of the system connection of the monitoring unit in the present invention;

[0034] In the figure: 1- cylindrical shell; 2- filter chamber; 3- curved inclined plate; 4- calcium sulfite particles; 5- activated carbon particles; 6- solenoid valve; 7- gas storage tank; 8- pressure gauge; 9- compressor; 10- aeration chamber; 11- external clamping ring; 12- monitoring unit; 13- breathable rubber membrane; 14- internal support clamping ring; 15- data storage and sending module; 16- residual chlorine monitoring probe; 17- probe protective shell; 18- air distribution chamber; 19- air chamber; 20- diamond sieve hole. DETAILED DESCRIPTION

[0035] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings. It should be noted that the embodiments are illustrative and not restrictive, and the scope of protection of the present invention cannot be limited thereby.

[0036] A filtering device for monitoring the residual chlorine content at a reclaimed water replenishment port comprises a filtering unit, a monitoring unit 12 and an air supply unit, wherein the filtering unit is axially plugged and fixed inside the drain pipe of the reclaimed water replenishment port, monitoring units are fixed at both ends of the filtering unit, and one end of the filtering unit is connected to the air supply unit; the filtering unit comprises a cylindrical shell 1, a curved inclined plate 3 and an aeration chamber 10, wherein a plurality of curved inclined plates with holes are fixedly connected at intervals parallel and inclined to each other inside the cylindrical shell, and an aeration chamber connected to the air supply unit and the inner cavity of the cylindrical shell is axially fixed on the lower inner wall of the cylindrical shell; the curved inclined plate divides the inner cavity of the cylindrical shell into a plurality of inclined filter chambers 2, and the filter chambers are partially filled with filter particles powered by water flow, aeration and gravity and limited by the curved inclined plate and the inner wall of the cylindrical shell.

[0037] Moreover, the aeration chamber includes an air chamber 19, an air distribution chamber 18 and a breathable rubber membrane 13, wherein the air chamber is a semi-cylindrical structure, the air chamber extends axially and covers the lower half of the inner cavity of the overall cylindrical shell, the circumferential outer wall of the air chamber is fixedly connected to the circumferential inner wall of the lower part of the cylindrical shell, and a plurality of air distribution chambers are arranged and connected on the circumferential inner wall of the air chamber, and a breathable rubber membrane is compositely bonded on the inner arc surface composed of the plurality of air distribution chambers; the air distribution chamber is connected to the inner gas of the filter chamber in a one-way manner through the breathable rubber membrane.

[0038] Moreover, the curved inclined plate is tilted and fixed inside the cylindrical shell, with the top of the curved inclined plate close to the water inlet end of the cylindrical shell, the bottom of the curved inclined plate close to the drainage end of the cylindrical shell, the concave curved surface of the curved inclined plate faces the water inlet end of the cylindrical shell, and a plurality of diamond-shaped sieve holes 20 are penetrated on the curved surface of the curved inclined plate.

[0039] Moreover, the filter particles include calcium sulfite particles 4 and activated carbon particles 5, and the calcium sulfite particles and activated carbon particles are alternately filled in two adjacent filter chambers.

[0040] Moreover, the air supply unit includes a connected compressor 9 and an air storage tank 7, wherein the exhaust end pipeline of the compressor is connected to the air storage tank, and a pressure gauge 8 is provided on the pipeline; the exhaust end pipeline of the air storage tank is connected to one end of the air chamber in the aeration chamber, and an electromagnetic valve 6 is provided on the pipeline.

[0041] Moreover, the monitoring unit includes a probe protective shell 17, a residual chlorine monitoring probe 16 and a data storage and sending module 15, wherein the probe protective shell is radially fixed on the inner walls at both ends of the cylindrical shell, the residual chlorine monitoring probe is fixed in the probe protective shell, the data storage and sending module is fixed on the top of the probe protective shell, and the inner cavity of the probe protective shell is connected to the inner cavity of the cylindrical shell; the residual chlorine monitoring probe is electrically connected to the data storage and sending module.

[0042] Moreover, multiple inner support rings 14 are coaxially fixedly connected to the inside of the drainage pipe of the regenerated water replenishment port; multiple outer retaining rings 11 that cooperate with the inner support rings to axially limit the cylindrical shell are fixedly connected to the circumferential outer wall of the cylindrical shell.

[0043] A method for dechlorination of a residual chlorine content monitoring and filtering device for a reclaimed water replenishment port comprises the following steps:

[0044] Step 1: Preparation: First, determine the diameter of the drainage pipe for the reclaimed water inlet, select a cylindrical shell with a diameter that matches the pipe diameter, and rotate the cylindrical shell in a circular direction so that the high end of the curved inclined plate faces the water inlet end of the cylindrical shell and the low end of the curved inclined plate faces the drainage end of the cylindrical shell. At this point, the cylindrical shell is alternately filled with calcium sulfite granules and activated carbon granules.

[0045] Step 2: The front and rear residual chlorine detectors monitor the corresponding residual chlorine levels, and the two detectors can calibrate each other to ensure normal operation of the detectors and obtain accurate and reliable data. The residual chlorine detector stores the data in real time in the memory IC and uploads the data to the host computer via the GPRS signal upload module in real time. The host computer records the received residual chlorine data and the current detection time, and obtains the total amount of residual chlorine in the outflow of the reclaimed water replenishment outlet through comprehensive calculation.

[0046] Step 3: When the residual chlorine content L1 of the incoming water detected by the front residual chlorine detector is higher than the set upper limit value LM, the data value is stored in the memory IC, and the data is uploaded to the host computer in real time through the GPRS signal upload module; the processor sends a command to the solenoid valve, the solenoid valve is turned on, and the gas in the gas tank enters the gas pipe. After entering the gas chamber, the gas enters the gas distribution chamber respectively, which can evenly distribute the gas. After the gas passes through the rubber membrane, the pressure drops rapidly to form extremely fine microporous bubbles, which float up quickly, disturb the water body, and drive the movement of calcium sulfite particles and activated carbon particles. On the one hand, the gas in the bubbles can carry Cl2 out of the water body, and on the other hand, it can promote the full contact between calcium sulfite particles and activated carbon particles and Cl2 in the water body, thereby achieving the purpose of eliminating residual chlorine;

[0047] When the residual chlorine content L2 of the incoming water detected by the post-residual chlorine detector is lower than the set standard value LN, the data is stored in the memory IC and uploaded to the host computer in real time through the GPRS signal upload module; the processor sends a command to the solenoid valve, the solenoid valve is closed, the gas in the gas tank stops entering the gas pipeline, and the compressor stops working;

[0048] Step 4: During the operation of the dechlorination device, the residual chlorine amount monitored by the front and rear residual chlorine detectors is combined with the monitoring time recorded by the host computer to accurately calculate the flow dechlorination amount.

[0049] In order to more clearly describe the specific implementation of the present application, an example is provided below:

[0050] The present invention relates to a filter device for monitoring the residual chlorine content in a reclaimed water replenishment port and a method for dechlorination thereof. The cylindrical shell is made of a material such as concrete, stainless steel, or hard plastic that can bear a considerable pressure of water flowing through the pipe. The cylindrical shell can be directly fixed axially and clamped to the inside of the reclaimed water pipe by selecting a matching pipe diameter. The interior of the cylindrical shell is divided into a plurality of inclined filter chambers by curved inclined plates. The filter chambers are filled with calcium sulfite particles and activated carbon particles. The calcium sulfite particles and activated carbon particles are powered to and fro by bubbles discharged from the aeration chamber at the bottom, the water flow in the reclaimed water pipe, and gravity. The contact time between the bottom aeration bubbles and the filling particles is longer, the contact area is larger, and greater buoyancy is provided for the filling particles. Combined with the impact force of the water flow, the filling particles are subjected to violent movement and better contact with the residual chlorine in the water body.

[0051] In addition, the present invention preferably sets the posture of the cambered inclined plate as follows: (1) the cambered inclined plate can be set to a corresponding curvature according to the actual application water conservancy conditions; (2) the holes on the cambered inclined plate are set to diamond sieve holes, which are not easily blocked by filled particles; (3) the cambered surface of the cambered inclined plate is set to face the direction of the cambered inclined plate. Figure 6 As shown, the axis of the curved inclined plate contacts the water flow direction at a small angle, and the filled particles are not easily attached or stuck in the holes of the curved inclined plate under the action of water flow and aeration, thus avoiding clogging the water flow section.

[0052] The front filler acts as a cleaning ball for the curved inclined plate, which can generate impact force on the rear curved inclined plate during violent movement, impacting the position where the rear filler has blocked the sieve hole, so as to keep the sieve hole unobstructed as much as possible.

[0053] The curved ramp frame is made of smooth stainless steel to prevent particles from getting caught. The mesh holes in the water-passing section of the curved ramp are made of highly elastic alloy spring steel, which offers a certain degree of plasticity, toughness, corrosion resistance, and long-term elasticity. The relative elasticity and vibration amplitude of the alloy spring steel mesh are greater than those of ordinary meshes, and the aperture can be controlled to vary within a certain range. The dynamic curved ramp effectively prevents mesh clogging.

[0054] In addition, the present invention preferably has the calcium sulfite particles being able to react chemically with Cl2 in the water body, and the calcium sulfite particles being able to reduce Cl2:

[0055] CaSO3+Cl2+H2O=CaSO4+2HCl

[0056] Activated carbon particles are porous and have strong adsorption capacity. They can absorb Cl2 in water and substances such as Cl-, ClO-, HOCl attached to other microparticles. In addition, activated carbon particles can also absorb calcium sulfate precipitates generated by the reaction of calcium sulfite particles and chlorine gas.

[0057] On the other hand, the process of adding chlorine to generate Cl-, ClO-, HOCl and other substances in the chlorination disinfection method is reversible:

[0058]

[0059] When calcium sulfite particles and activated carbon particles eliminate Cl2, the reaction spontaneously proceeds to generate Cl2, thereby promoting calcium sulfite particles and activated carbon particles to further eliminate Cl2, accelerating the reaction efficiency and improving the chlorine removal effect.

[0060] In addition, the present invention preferably has a residual chlorine monitoring probe which is a constant potential chronoamperometric three-electrode sensor. When the residual chlorine passes through the membrane device and enters the electrolyte, a potential difference is generated, thereby monitoring the residual chlorine concentration in the water body; the probe protective shell can effectively offset the impact of the water flow on the probe, resist the impact of particles that may be carried in the water body, and at the same time provide a relatively stable monitoring environment for the probe, thereby improving the accuracy of the probe monitoring; the data storage and transmission module body is composed of a single chip, which includes a 64-bit quad-core microprocessor BROADCOM BCM2837, a GPRS signal upload module, and a memory module IC model IS62WV51216BLL-55TLIC. The data monitored by the residual chlorine probe is stored in the memory IC, and the data is uploaded to the host computer in real time through the GPRS signal upload module.

[0061] Preferably, in the present invention, the compressor compresses air through an air filter into a gas storage tank. When the pressure reaches the set pressure, the compressor stops working. When the pressure is less than the set pressure, the compressor starts working. The gas in the gas storage tank enters the gas pipeline through a solenoid valve. After the gas enters the air chamber, it enters the air distribution chamber respectively, and the gas can be evenly distributed. After the gas passes through the breathable rubber membrane, the pressure drops rapidly to form extremely fine microporous bubbles, which quickly float upward, disturbing the water body and driving the calcium sulfite particles and activated carbon particles to move. On the one hand, the gas in the bubbles can carry Cl2 in the water body out of the water body. On the other hand, it can promote the full contact of the calcium sulfite particles and activated carbon particles with Cl2 in the water body, so as to achieve the purpose of removing residual chlorine.

[0062] In addition, in the actual filtration process of the present invention:

[0063] Calcium sulfite particles and activated carbon particles are alternately filled into the inside of the inclined groove. At this time, the filled particulate matter is laid flat on the inner wall of the pipeline. When the upstream residual chlorine monitoring probe monitors that the residual chlorine content L1 of the incoming water is higher than the set upper limit value LM (L1>LM), the data is stored in the memory IC, and the data is uploaded to the upper computer in real time through the GPRS signal upload module. The processor issues an instruction to the solenoid valve, and the solenoid valve is turned on. The gas in the gas storage tank enters the gas pipeline. After the gas enters the air chamber, it enters the air distribution chamber respectively, and the gas can be evenly distributed. After the gas passes through the rubber membrane, the pressure drops rapidly to form extremely fine microporous bubbles, which quickly float upward, disturbing the water body and driving the calcium sulfite particles and activated carbon particles to move. On the one hand, the gas in the bubbles can carry Cl2 in the water body out of the water body. On the other hand, it can promote the full contact of the calcium sulfite particles and activated carbon particles with Cl2 in the water body, so as to achieve the purpose of removing residual chlorine.

[0064] When the downstream residual chlorine monitoring probe monitors that the residual chlorine content L2 of the incoming water is lower than the set standard value LN (L2<LN), the data is stored in the memory IC, and the data is uploaded to the upper computer in real time through the GPRS signal upload module. The processor issues an instruction to the solenoid valve, and the solenoid valve is cut off, and the gas in the gas storage tank stops entering the air chamber.

[0065] After stopping aeration, part of the filled particulate matter still moves with the impact of the water flow, and the other part changes from being originally laid flat on the inner wall of the bottom pipeline to being laid flat on the inclined groove. On the one hand, it avoids the situation of扎堆聚集 at the bottom, and on the other hand, it尽可能扩大 the contact area between the particulate matter and the vertical section of the water flow as much as possible. The filled particulate matter can be replaced after being used for a period of time.

[0066] The chlorine removal process in the above cycle stage changes with the change of the water quality of the water body, and it can well address the situation of complex and fluctuating reclaimed water quality.

[0067] Finally, for the parts not described in the present invention, mature products and mature method means in the existing methods are adopted.

[0068] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A residual chlorine content monitoring and filtering device for a reclaimed water replenishment port, characterized in that: It comprises a filter unit, a monitoring unit and an air supply unit, wherein the filter unit is axially plugged and fixed inside the drain pipe of the regenerated water replenishment port, the monitoring units are fixed at both ends of the filter unit, and one end of the filter unit is connected to the air supply unit; the filter unit comprises a cylindrical shell, a curved inclined plate and an aeration chamber, wherein a plurality of curved inclined plates with holes are fixedly connected at intervals in parallel and obliquely to the interior of the cylindrical shell, and an aeration chamber connected to the air supply unit and the inner cavity of the cylindrical shell is axially fixed on the lower inner wall of the cylindrical shell; the curved inclined plate divides the inner cavity of the cylindrical shell into a plurality of inclined filter chambers, and the filter chambers are partially filled with filter particles powered by water flow, aeration and gravity and limited by the curved inclined plate and the inner wall of the cylindrical shell; The arc-shaped inclined plate is fixedly arranged inside the cylindrical shell at an angle, with the top of the arc-shaped inclined plate close to the water inlet end of the cylindrical shell, and the bottom of the arc-shaped inclined plate close to the drainage end of the cylindrical shell. The concave arc surface of the arc-shaped inclined plate faces the water inlet end of the cylindrical shell, and a plurality of diamond-shaped sieve holes are penetrated on the arc surface of the arc-shaped inclined plate. The aeration chamber includes an air chamber, an air distribution chamber, and a breathable rubber membrane, wherein the air chamber is a semi-cylindrical structure, the air chamber extends axially and covers the lower half of the inner cavity of the overall cylindrical shell, the circumferential outer wall of the air chamber is fixedly connected to the circumferential inner wall of the lower part of the cylindrical shell, and multiple air distribution chambers are arranged and connected on the circumferential inner wall of the air chamber, and the breathable rubber membrane is compositely bonded on the inner arc surface formed by the multiple air distribution chambers; the air distribution chamber is in one-way gas communication with the interior of the filter chamber through the breathable rubber membrane; The filter particles include calcium sulfite particles and activated carbon particles, and the calcium sulfite particles and activated carbon particles are alternately filled in two adjacent filter cavities; The monitoring unit includes a probe protection shell, a residual chlorine monitoring probe and a data storage and sending module, wherein the probe protection shell is radially fixed on the inner walls at both ends of the cylindrical shell, the residual chlorine monitoring probe is fixed in the probe protection shell, the data storage and sending module is fixed on the top of the probe protection shell, and the inner cavity of the probe protection shell is connected to the inner cavity of the cylindrical shell; the residual chlorine monitoring probe is electrically connected to the data storage and sending module.

2. A reclaimed water replenishment port residual chlorine content monitoring and filtering device according to claim 1, characterized in that: The air supply unit includes a connected compressor and an air storage tank, wherein the exhaust end pipeline of the compressor is connected to the air storage tank, and a pressure gauge is provided on the pipeline; the exhaust end pipeline of the air storage tank is connected to one end of the air chamber in the aeration cavity, and a solenoid valve is provided on the pipeline.

3. A reclaimed water replenishment port residual chlorine content monitoring and filtering device according to claim 1, characterized in that: The drainage pipe of the regenerated water replenishment port is coaxially fixed with multiple inner support clamps; the circumferential outer wall of the cylindrical shell is fixedly connected with multiple outer clamps that cooperate with the inner support clamps to axially limit the cylindrical shell.

4. A dechlorination method for the residual chlorine content monitoring and filtering device for the reclaimed water replenishment port according to claim 1, characterized in that: The following steps are involved: Step 1: Preparation: First, determine the diameter of the drainage pipe for the reclaimed water inlet, select a cylindrical shell with a diameter that matches the pipe diameter, and rotate the cylindrical shell in a circular direction so that the high end of the curved inclined plate faces the water inlet end of the cylindrical shell and the low end of the curved inclined plate faces the drainage end of the cylindrical shell. At this point, the cylindrical shell is alternately filled with calcium sulfite granules and activated carbon granules. Step 2: The front and rear residual chlorine detectors monitor the corresponding residual chlorine levels, and the two detectors can calibrate each other to ensure normal operation of the detectors and obtain accurate and reliable data. The residual chlorine detector stores the data in real time in the memory IC and uploads the data to the host computer via the GPRS signal upload module in real time. The host computer records the received residual chlorine data and the current detection time, and obtains the total amount of residual chlorine in the outflow of the reclaimed water replenishment outlet through comprehensive calculation. Step 3: When the residual chlorine content L1 of the incoming water detected by the front residual chlorine detector is higher than the set upper limit value LM, the data value is stored in the memory IC, and the data is uploaded to the host computer in real time through the GPRS signal upload module; the processor sends a command to the solenoid valve, the solenoid valve is turned on, and the gas in the gas tank enters the gas pipe. After entering the gas chamber, the gas enters the gas distribution chamber respectively, which can evenly distribute the gas. After the gas passes through the rubber membrane, the pressure drops rapidly to form extremely fine microporous bubbles, which float up quickly, disturb the water body, and drive the movement of calcium sulfite particles and activated carbon particles. On the one hand, the gas in the bubbles can carry Cl2 out of the water body, and on the other hand, it can promote the full contact between calcium sulfite particles and activated carbon particles and Cl2 in the water body, thereby achieving the purpose of eliminating residual chlorine; When the residual chlorine content L2 of the incoming water detected by the post-residual chlorine detector is lower than the set standard value LN, the data is stored in the memory IC and uploaded to the host computer in real time through the GPRS signal upload module; the processor sends a command to the solenoid valve, the solenoid valve is closed, the gas in the gas tank stops entering the gas pipeline, and the compressor stops working; Step 4: During the operation of the dechlorination device, the residual chlorine amount monitored by the front and rear residual chlorine detectors is combined with the monitoring time recorded by the host computer to accurately calculate the flow dechlorination amount.

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