CN-121994563-A - Water quality pretreatment system and control method thereof

CN121994563ACN 121994563 ACN121994563 ACN 121994563ACN-121994563-A

Abstract

The application discloses a water quality pretreatment system and a control method thereof, which relate to the field of water quality analysis and comprise the following steps: sample liquid storage pot, advance kind pump, reagent liquid storage pot, reagent pump, pretreatment column base, conductivity sensor, play liquid collection device and controller, the automatic quick-operation joint of pretreatment column base, pretreatment column plummer and drive arrangement movable mounting are in the loading surface of base, drive arrangement's power take off end and pretreatment column plummer meshing, be provided with the seat that is used for bearing the pretreatment column of multiple different grade respectively on the pretreatment column plummer, sample and reagent carry to automatic quick-operation joint through the pump body, the controller control it with pretreatment column butt joint confession liquid. The treated liquid passes through the liquid guide tube and the liquid outlet tube to the collecting device, and the conductivity sensor detects the liquid outlet conductivity in real time and feeds back the liquid. The pretreatment column automatic switching and state monitoring device realizes automatic switching and state monitoring of the pretreatment column, avoids pollution, timely finds out failure, and improves the pretreatment efficiency and effect of water quality.

Inventors

ZHAO SHULI
ZHANG HUILAN
ZHANG LINLIN
JI HAIXIA
YU HAIBIN
TAN LI
ZHENG XIAOYAN
WANG RUOYAO

Assignees

中国环境监测总站

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (10)

1. A water quality pretreatment system, comprising: A sample liquid storage tank, a sample injection pump, a reagent liquid storage tank, a reagent pump, a pretreatment column base, a conductivity sensor, a liquid outlet collecting device and a controller, The pretreatment column base comprises a base, an automatic quick connector, a pretreatment column bearing table and a driving device, wherein the automatic quick connector, the pretreatment column bearing table and the driving device are movably arranged on a bearing surface of the base, a power output end of the driving device is meshed with the pretreatment column bearing table, bearing seats respectively used for bearing a plurality of different types of pretreatment columns are arranged on the pretreatment column bearing table, and the bearing seats are adaptive to the shapes of liquid outlet ends of the pretreatment columns; The outlet of the sample liquid storage tank is communicated with the liquid inlet of the sample injection pump through a pipeline, the outlet of the reagent liquid storage tank is communicated with the liquid inlet of the reagent pump through a pipeline, the liquid outlet of the sample injection pump is communicated with the first liquid inlet of the automatic quick connector, the liquid outlet of the reagent pump is communicated with the second liquid inlet of the automatic quick connector, the automatic quick connector acts between a first position and a second position, the liquid outlet of the automatic quick connector is communicated with the liquid inlet end of a pretreatment column borne by a target bearing seat in the first position, the liquid outlet of the automatic quick connector is disconnected with the liquid inlet end of a pretreatment column borne by the target bearing seat in the second position, the liquid outlet end of the pretreatment column is communicated with liquid guide pipes in the bearing seat, the liquid guide pipes are communicated with the liquid outlet pipes of the bearing seat of the pretreatment column, the liquid outlet pipes are communicated with the liquid inlet of the liquid collecting device, the conductivity sensor is arranged in the liquid outlet pipe, and the target bearing seat is any one of the bearing seats of the pretreatment column; the sample injection pump, the reagent pump, the automatic quick connector, the driving device, the conductivity sensor and the liquid outlet collecting device are all in communication connection with the controller.
2. The water quality pretreatment system according to claim 1, further comprising: the ultraviolet detector is arranged in the liquid outlet pipe and is in communication connection with the controller.
3. The water quality pretreatment system according to claim 1, further comprising: the pressure sensor is arranged in the liquid outlet of the automatic quick connector and is in communication connection with the controller.
4. A water quality pretreatment system according to any of claims 1 to 3, wherein the effluent collection means comprises: Three solenoid valve, liquid storage pot and waste liquid jar, three solenoid valve's inlet with the drain pipe intercommunication, three solenoid valve's first liquid outlet with the entry intercommunication of liquid storage pot, three solenoid valve's second liquid outlet with the entry intercommunication of waste liquid jar, three solenoid valve with controller communication connection.
5. The water quality pretreatment system according to claim 1, further comprising: The flow sensor and the variable frequency valve are connected in series and arranged in the liquid outlet of the automatic quick connector, and the flow sensor and the variable frequency valve are both in communication connection with the controller.
6. The water quality pretreatment system of claim 1, wherein the pretreatment column carrier is a turntable structure or a linear guide structure.
7. A control method of a water quality pretreatment system, characterized by being applied to a controller in a water quality pretreatment system according to any one of claims 1 to 6, comprising: Responding to a pretreatment starting signal, controlling a driving device of a pretreatment column base to drive a pretreatment column bearing table to move so as to enable a target bearing seat of the pretreatment column bearing table to be located at a target position, wherein the target bearing seat is a bearing seat corresponding to bearing coordinates in the pretreatment starting signal in each bearing seat on the pretreatment column bearing table, and controlling an automatic quick connector of the pretreatment column base to move from a second position to a first position, wherein a liquid outlet of the automatic quick connector is communicated with a liquid inlet end of a pretreatment column borne by the target bearing seat when the automatic quick connector is at the first position; Under the condition that a liquid outlet of the automatic quick connector is communicated with a liquid inlet end of a target pretreatment column, controlling a sample injection pump and a reagent pump to operate so as to enable a sample in a sample liquid storage tank communicated with the liquid inlet of the sample injection pump and a reagent in a reagent liquid storage tank communicated with the liquid inlet of the reagent pump to flow into the target pretreatment column through the automatic quick connector; controlling a conductivity sensor to acquire the conductivity of the liquid pretreated by the target pretreatment column in a liquid outlet pipe of the pretreatment column bearing table; And controlling a liquid collecting device to collect the liquid pretreated by the target pretreatment column at least under the condition that the conductivity is not more than a preset conductivity threshold.
8. The method for controlling a water quality pretreatment system as recited in claim 7, further comprising: the ultraviolet detector is arranged in the liquid outlet pipe and is in communication connection with the controller; Before the control liquid collecting device collects the liquid pretreated by the target pretreatment column, the control method of the water quality pretreatment system further comprises the following steps: controlling the ultraviolet detector to collect ultraviolet absorbance of the liquid pretreated by the target pretreatment column in the liquid outlet pipe; Controlling the liquid collecting device to discard the liquid pretreated by the target pretreatment column under the condition that the conductivity is larger than a preset conductivity threshold or the ultraviolet absorbance is not larger than a preset absorbance threshold; At least under the condition that the conductivity is not greater than the preset conductivity threshold, controlling a liquid outlet collecting device to collect the liquid pretreated by the target pretreatment column comprises controlling the liquid outlet collecting device to collect the liquid pretreated by the target pretreatment column under the condition that the conductivity is not greater than the preset conductivity threshold and the ultraviolet absorbance is not greater than the preset absorbance threshold.
9. The method for controlling a water quality pretreatment system as recited in claim 8, wherein said effluent collecting means comprises: The liquid inlet of the three-way electromagnetic valve is communicated with the liquid outlet pipe, the first liquid outlet of the three-way electromagnetic valve is communicated with the inlet of the liquid storage tank, the second liquid outlet of the three-way electromagnetic valve is communicated with the inlet of the liquid waste tank, and the three-way electromagnetic valve is in communication connection with the controller; the control liquid outlet collecting device collects the liquid pretreated by the target pretreatment column, and the control liquid outlet collecting device comprises: And controlling the first liquid outlet to be conducted and controlling the second liquid outlet to be closed.
10. The method for controlling a water quality pretreatment system as recited in claim 7, further comprising: The flow sensor and the variable frequency valve are connected in series and arranged in the liquid outlet of the automatic quick connector, and the flow sensor and the variable frequency valve are both in communication connection with the controller; the control method of the water quality pretreatment system further comprises the following steps: And controlling the flow sensor to collect the liquid flow rate in the automatic quick connector, and controlling the opening of the variable frequency valve based on the liquid flow rate.

Description

Water quality pretreatment system and control method thereof Technical Field The application relates to the technical field of water quality detection, in particular to a water quality pretreatment system and a control method thereof. Background In the laboratory water quality analysis flow, sample pretreatment is a key link for determining the accuracy of a detection result. In the existing pretreatment process, a sample is input into a pretreatment column, so that the pretreatment column is utilized to achieve the treatment effects of adsorption, separation or enrichment, and the like, thereby improving the detection signal-to-noise ratio of a target analyte while removing interference impurities in the sample, and further improving the subsequent water quality detection precision. However, since the structure of the existing pretreatment device is relatively fixed, when various types of pretreatment are required, the pretreatment column needs to be manually replaced, which results in sample pollution and reduced pretreatment efficiency. Meanwhile, as the pretreatment column has failure risk in the use process, the existing pretreatment device cannot detect the effective state of the pretreatment column, so that whether the pretreatment column fails or not can be reversely pushed only based on the detection result, and the failure needs to be pretreated again and detected, thereby reducing the pretreatment effect and efficiency. Therefore, how to improve the treatment effect and efficiency of the pretreatment link in the water quality analysis process has become a problem to be solved. Disclosure of Invention In view of the above problems, the present application provides a water quality pretreatment system and a control method thereof, so as to achieve the purpose of improving the water quality pretreatment effect and efficiency. The specific scheme is as follows: the first aspect of the present application provides a water quality pretreatment system, comprising: A sample liquid storage tank, a sample injection pump, a reagent liquid storage tank, a reagent pump, a pretreatment column base, a conductivity sensor, a liquid outlet collecting device and a controller, The pretreatment column base comprises a base, an automatic quick connector, a pretreatment column bearing table and a driving device, wherein the automatic quick connector, the pretreatment column bearing table and the driving device are movably arranged on a bearing surface of the base, a power output end of the driving device is meshed with the pretreatment column bearing table, bearing seats respectively used for bearing a plurality of different types of pretreatment columns are arranged on the pretreatment column bearing table, and the bearing seats are adaptive to the shapes of liquid outlet ends of the pretreatment columns; The outlet of the sample liquid storage tank is communicated with the liquid inlet of the sample injection pump through a pipeline, the outlet of the reagent liquid storage tank is communicated with the liquid inlet of the reagent pump through a pipeline, the liquid outlet of the sample injection pump is communicated with the first liquid inlet of the automatic quick connector, the liquid outlet of the reagent pump is communicated with the second liquid inlet of the automatic quick connector, the automatic quick connector acts between a first position and a second position, the liquid outlet of the automatic quick connector is communicated with the liquid inlet end of a pretreatment column borne by a target bearing seat in the first position, the liquid outlet of the automatic quick connector is disconnected with the liquid inlet end of a pretreatment column borne by the target bearing seat in the second position, the liquid outlet end of the pretreatment column is communicated with liquid guide pipes in the bearing seat, the liquid guide pipes are communicated with the liquid outlet pipes of the bearing seat of the pretreatment column, the liquid outlet pipes are communicated with the liquid inlet of the liquid collecting device, the conductivity sensor is arranged in the liquid outlet pipe, and the target bearing seat is any one of the bearing seats of the pretreatment column; the sample injection pump, the reagent pump, the automatic quick connector, the driving device, the conductivity sensor and the liquid outlet collecting device are all in communication connection with the controller. In one possible implementation, the water quality pretreatment system further comprises: the ultraviolet detector is arranged in the liquid outlet pipe and is in communication connection with the controller. In one possible implementation, the water quality pretreatment system further comprises: the pressure sensor is arranged in the liquid outlet of the automatic quick connector and is in communication connection with the controller. In one possible implementation, the effluent collection device comprises: Three solenoid valve,