In-situ online monitoring water sample preparation device

Abstract

The utility model discloses an in-situ online monitoring water sample preparation device which sequentially comprises a base plate, a water sample chamber and a top cover from bottom to top, the water sample chamber is of a columnar structure, a plurality of grooves and bulges which are arranged at intervals are circumferentially arranged on the bottom surface of the water sample chamber, the grooves are communicated with the interior of the water sample chamber, and the bulges are fixedly connected with the inner surface of the chassis; the top cover is composed of a barrel and a cover body, the barrel is in sealed connection with the outer side face of the top of the water sample chamber, an air pipe connector and a sampling pipe connector are arranged on the cover body, the air pipe connector is used for being externally connected with an air pipe to complete air inlet and exhaust of the water sample chamber, the sampling pipe connector is used for being communicated with a sampling pipe, and the other end of the sampling pipe is connected with a sample pool of a detection instrument. And conveying the water sample obtained by static precipitation in the water sample chamber to a sample pool. According to the water sample pretreatment device, the water sample pretreatment effect and the continuity and stability of water quality detection can be improved, and the processing and operating cost of the water sample pretreatment device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage on -line monitoring technical field especially, it is a kind of in situ on -line monitoring water sample preparation device. BACKGROUND

[0002] With the development of automation and intelligentization of sewage treatment industry, on-line detection instrument has been widely applied to the monitoring of influent and effluent and process water quality in sewage treatment plant, to provide field sensing data for intelligent control system, so as to timely adjust the operation parameters of sewage treatment facilities and instruments, and guarantee standard discharge.

[0003] In sewage on-line monitoring point, the water quality of influent and process unit is complex, and suspended particles have great interference on water quality detection, which makes the stability and reliability of on-line detection data face great challenges, affects the control and diagnostic analysis of intelligent water system, and further affects the effective operation of intelligent water system.

[0004] Separation technology can solve this problem, but separation technology (such as membrane separation and screen filtration) has the disadvantages of high energy consumption (power consumption) and large maintenance workload (clogging problem), and separation technology, especially membrane separation, has great influence on water quality detection results.

[0005] With the rapid development of artificial intelligence technology, the intelligentization of sewage treatment plant operation and management is also accelerating, and intelligent sampling, pretreatment and detection are also part of the intelligentization of sewage plant, so it is urgent to solve the current technical problems to ensure the stable and standard operation and the realization of intelligent operation of sewage plant. UTILITY MODEL CONTENT

[0006] The utility model solves the technical problem to provide a kind of in situ on-line monitoring water sample preparation device, can improve water sample pretreatment effect and the continuity, stability of water quality detection, reduce the processing and operation cost of water sample pretreatment device.

[0007] To solve the above technical problems, one technical scheme of the utility model is provided: a kind of in situ on-line monitoring water sample preparation device, from bottom to top sequentially includes bottom disc, water sample chamber and top cover;

[0008] The water sample chamber is columnar structure, and a plurality of interval arranged grooves and protrusions are arranged on the bottom surface periphery, the groove is communicated with the inside of water sample chamber, and the protrusion is fixedly connected with the inner surface of bottom disc;

[0009] The top cover is composed of a cylinder and a cover body, the cylinder is sealingly connected with the outer side of the top of the water sample chamber, the cover body is provided with a gas pipe interface and a sampling pipe interface, the gas pipe interface is used for connecting a gas pipe to complete air inlet and air outlet of the water sample chamber, and the sampling pipe interface is used for connecting a sampling pipe, one end of the sampling pipe is connected with a sample pool of a detection instrument, and the water sample obtained by the water sample chamber through static precipitation is transported to the sample pool.

[0010] In a preferred embodiment of the present application, the bottom of the water sample chamber is located inside the bottom disc, and the inner diameter of the bottom disc is greater than the outer diameter of the water sample chamber.

[0011] In a preferred embodiment of the present application, the height of the bottom disc is not less than the height of the groove on the bottom surface of the water sample chamber.

[0012] In a preferred embodiment of the present application, the interval distance between the two adjacent grooves on the bottom surface of the water sample chamber is 2-5 cm.

[0013] Further, the height of the water sample chamber is 2-4 times of the inner diameter.

[0014] In a preferred embodiment of the present application, a three-way control valve is arranged on the gas pipe connected with the gas pipe interface, which is used for controlling air inlet and air outlet of the water sample chamber.

[0015] In a preferred embodiment of the present application, the sampling pipe is connected with the sampling pipe interface at both ends, and the length of the sampling pipe located in the water sample chamber is 1.5-3 cm deep into the liquid surface.

[0016] The present application has the advantages of simple and ingenious structure, the use of the gas pipe interface and the sampling pipe interface on the top cover can update the water sample by using pressurized air, and obtain the clear water sample for detection by using in-situ static settlement, the whole device does not contain components that are easy to wear or need frequent maintenance, has less maintenance work, high operation reliability, low operation cost, high water sample preparation efficiency, can meet the real-time requirements of online monitoring, and the water sample obtained by static precipitation is basically consistent with the water sample collected by daily manual analysis, so that the influence of medium filtration separation on the water quality detection result is avoided, and the energy consumption and filter medium loss required for filtration are also saved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of a preferred embodiment of the in-situ online monitoring water sample preparation device of the present application;

[0018] Figure 2 is a structural schematic diagram of the in-situ online monitoring water sample preparation device of the present application;

[0019] Figure 3 is a system block diagram of the in-situ online monitoring water sample preparation device of the present application in use.

[0020] The labels of the components in the drawings are as follows: 1, base plate, 2, water sample chamber, 21, groove, 22, protrusion, 3, top cover, 31, cylinder, 32, cover, 4, air pipe interface, 5, sampling pipe interface, 6, three-way control valve, 7, electromagnetic valve, 8, air pipe. DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described in detail below with reference to the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0022] Please refer to Figure 1 The utility model embodiment includes:

[0023] A device for in-situ online monitoring of water sample preparation comprises, from bottom to top, a base plate 1, a water sample chamber 2 and a top cover 3.

[0024] The water sample chamber 2 is in a columnar structure, and a plurality of grooves 21 and protrusions 22 are arranged at intervals in the circumferential direction of the bottom surface. The grooves 21 are in communication with the inside of the water sample chamber 2, and the protrusions 22 are fixedly connected to the inner surface of the base plate 1. The top cover 3 is composed of a cylinder 31 and a cover 32. The cylinder 31 is sealingly connected to the outer side surface of the top of the water sample chamber 2. The cover 32 is provided with an air pipe interface 4 and a sampling pipe interface 5. The air pipe interface 4 is used for connecting an air pipe 8 to complete the air inlet and air outlet of the water sample chamber 2. The sampling pipe interface 5 is used for connecting a sampling pipe. The other end of the sampling pipe is connected to a sample pool of a detection instrument, so that the water sample obtained by the water sample chamber through static precipitation is transported to the sample pool.

[0025] Specifically, the bottom of the water sample chamber 2 is located inside the base plate 1, and the inner diameter of the base plate 1 is 1-3 cm larger than the outer diameter of the water sample chamber 2. In this example, the water sample chamber 2 is in a cylindrical structure, with an inner diameter of 10-30 cm and a height of 2-4 times the inner diameter. The height of the groove 21 is 1-3 cm, the width of the groove 21 is 1-3 cm, and the interval distance between two adjacent grooves 21 is 2-5 cm. The base plate 1 can be made by one-time forming or processing. The height of the side surface of the base plate 1 is preferably greater than or equal to the height of the groove 21 at the bottom of the water sample chamber 2, and the maximum height is 2 times the height of the groove 21. The protrusion 22 is fixedly connected to the inner surface of the base plate 1 through screws and / or gaskets (not shown in the figure), so as to ensure the firm connection between the water sample chamber 2 and the base plate 1.

[0026] The top cover 3 can also be made by one-time forming or processing. In this example, the cover 32 is provided with an air pipe interface 4 at the middle position, which is in communication with a high-pressure air storage tank on site, such as Figure 2As shown, a three-way control valve 6 and / or a solenoid valve 7 can also be provided on the front end pipeline of the air pipe 8 for controlling the air intake and exhaust in the water sample chamber 2. A sampling pipe interface 5 is provided on one side of the air pipe interface 4, through which a sampling pipe is connected, and the other end of the sampling pipe is connected to a sample pool of a detection instrument, and through a peristaltic pump, the water sample in the water sample chamber 2 is transported to the sample pool for use by the online instrument. Further, the sampling pipe interface 5 is connected to the sampling pipe at both ends, and the length of the sampling pipe located in the water sample chamber 2 needs to be deep into the liquid surface by 1.5-3 cm. The inner side of the barrel body 31 part of the top cover 3 is tightly fitted with the outer side of the top end of the water sample chamber 2, and can be sealed and fixed by glue.

[0027] The in-situ online monitoring water sample preparation device operates in the following steps and methods when in use:

[0028] S1: Take water, open the high-pressure air control valve of the high-pressure air storage tank, inject air into the water sample chamber 2, under the action of air pressure, the original sewage in the water sample chamber 2 is discharged through the groove 21 at the bottom, then the air exhaust valve of the three-way control valve 6 is opened, and the sewage is allowed to enter the water sample chamber 2 to update the water sample in the water sample chamber 2. This operation can be repeated 2-3 times to achieve complete updating of the water sample;

[0029] S2: Separation, after the sewage in the water sample chamber 2 is updated, the latest water quality of the sewage is obtained, and then static sedimentation is used for 5-10 minutes to obtain the supernatant of the water sample.

[0030] S3: Sampling and detection, after the water sample is clarified, the peristaltic pump is started to extract the supernatant from the water sample chamber 2 to the sample pool of the online instrument, and the online instrument equipment extracts the water sample from the sample pool for detection operation.

[0031] S4: Standby, after sampling is completed, the system is in standby state, and the next water sample preparation process can be performed at any time according to the operation instruction.

[0032] The above process can be automatically completed by the program of the PLC.

[0033] The following describes the use method and process of the device by means of a specific embodiment:

[0034] A papermaking wastewater treatment plant installs an in-situ online monitoring water sample preparation device at the outlet of the aeration tank to monitor the COD change of the water quality in the aeration tank, which is used in combination with an online COD detection device to realize automatic sampling and automatic detection of the water sample, as shown in Figure 3 .

[0035] The specifications and parameters of the main components of the in-situ water sample preparation device are as follows:

[0036] The water sample chamber 2 is a PVC pipe with DN 160 (outer diameter 16 cm, wall thickness 0.4 cm), which is arranged vertically to the horizontal plane, with a height of 60 cm, and 8 grooves 21 are evenly excavated on the bottom surface of the water sample chamber 2, and each groove 21 corresponds to a circular arc with a length of 2 cm and a height of 2 cm.

[0037] The bottom disc 1 is spliced by a circular plane with a diameter of 20 cm and a PVC pipe cylinder with DN 200, and the height of the cylinder with DN 200 is 3 cm.

[0038] The inner diameter of the cylinder body 31 of the top cover 3 is 16.5 cm, which is tightly matched with the outer diameter of the water sample chamber 2 and is fixed by glue. The middle part of the top cover 3 is provided with a hole for installing and fixing an air pipe, and the air pipe 8 is connected with a high-pressure air storage tank. A three-way control valve 6 is installed at one end of the air pipe 8 close to the air storage tank, which controls the air inlet and outlet of the water sample chamber. The sampling pipe is installed in the hole in the peripheral area of the cover body 32, and the sampling pipe in the water sample chamber 2 is immersed in the liquid surface by 1.5-3 cm. The sampling pipe outside the water sample chamber 2 is arranged in the peristaltic pump, and the water sample is extracted and controlled.

[0039] The whole device is placed at the end of the aeration tank and is partially immersed in water. The installation height ensures that the liquid level in the water sample chamber 2 is about 5 cm away from the top end of the water sample chamber.

[0040] After the application of the technical solution, the automatic sampling system can be stably operated for a long time, the maintenance workload is greatly reduced, and the operation and maintenance cost is low.

[0041] The above description is only an embodiment of the utility model, and does not limit the patent range of the utility model. Any equivalent structure or equivalent process conversion according to the content of the utility model specification and drawings, or direct or indirect application in other related technical fields is also included in the patent protection range of the utility model.

Claims

1. An in-situ online monitoring water sample preparation device, characterized in that, From bottom to top, it includes a base, a water sample chamber, and a top cover; The water sample chamber is a columnar structure with several grooves and protrusions arranged at intervals around the bottom. The grooves are connected to the interior of the water sample chamber, and the protrusions are fixedly connected to the inner surface of the base plate. The top cover consists of a cylinder and a cover. The cylinder is sealed to the outer side of the top of the water sample chamber. The cover is provided with an air pipe interface and a sampling pipe interface. The air pipe interface is used to connect an external air pipe to complete the air intake and exhaust of the water sample chamber. The sampling pipe interface is used to connect a sampling pipe. The other end of the sampling pipe is connected to the sample cell of the detection instrument to transport the water sample obtained by static sedimentation in the water sample chamber to the sample cell.

2. The in-situ online monitoring water sample preparation device according to claim 1, characterized in that, The bottom of the water sample chamber is located inside the chassis, and the inner diameter of the chassis is larger than the outer diameter of the water sample chamber.

3. The in-situ online monitoring water sample preparation device according to claim 1, characterized in that, The height of the chassis is not less than the height of the groove on the bottom surface of the water sample chamber.

4. The in-situ online monitoring water sample preparation device according to claim 1, characterized in that, The distance between two adjacent grooves on the bottom surface of the water sample chamber is 2-5 cm.

5. The in-situ online monitoring water sample preparation device according to any one of claims 1 to 4, characterized in that, The height of the water sample chamber is 2 to 4 times its inner diameter.

6. The in-situ online monitoring water sample preparation device according to claim 1, characterized in that, The air pipe connected to the air pipe interface is equipped with a three-way control valve, which is used to control the air intake and exhaust of the water sample chamber.

7. The in-situ online monitoring water sample preparation device according to claim 1, characterized in that, Both ends of the sampling tube interface are connected to sampling tubes, and the sampling tube located in the water sample chamber is 1.5-3 cm deep into the liquid surface.

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