CN-224203160-U - Multi-flow-path brine double-alkali concentration on-line detection device

Abstract

The utility model discloses a multi-flow-path brine double-alkali concentration online detection device which comprises a crude brine sampling pipeline, a refined brine sampling pipeline, a pure water pipeline and a double-alkali online analyzer, wherein a micro-scale film filter is arranged on the crude brine sampling pipeline, one or more sampling pipelines are arranged, a liquid outlet of each sampling pipeline is respectively connected with one sample overflow tank, the double-alkali online analyzer comprises a sample injection pipeline, a cleaning pipeline and a waste liquid pipeline, the cleaning pipeline is connected with the pure water pipeline, the sample injection pipeline is multiple, the multiple sample injection pipelines are respectively connected with each sample overflow tank, and the waste liquid pipeline is connected with a salt mud tank. The utility model realizes the on-line detection and the switching of detection routes of the content of the crude brine component in the reaction tank in the primary brine process of the chemical industry of chlor-alkali, replaces manual sampling analysis, greatly improves the analysis efficiency of the inspection system, saves the cost of personnel, and reduces the unit consumption of sodium carbonate and caustic soda by timely adjusting the process control through the display of on-line detection data.

Inventors

• LI SHENGLI
• ZHANG GUOQI
• Mao Zhishuai
• ZHANG JIANHONG

Assignees

• 陕西北元化工集团股份有限公司

Dates

Publication Date

20260505

Application Date

20250506

Claims (8)

1. 1. The multi-flow-path brine double-alkali concentration online detection device is characterized by comprising a crude brine sampling pipeline (1), a refined brine sampling pipeline (2), a pure water pipeline (3) and a double-alkali online analyzer (7), wherein a fluorine lining ball valve (4) and a miniature Kai membrane filter (5) are arranged on the crude brine sampling pipeline (1); The crude brine sampling pipeline (1) and the refined brine sampling pipeline (2) are one or more, and the liquid outlets of each crude brine sampling pipeline (1) and each refined brine sampling pipeline (2) are respectively connected with one sample overflow tank (6); the double-alkali online analyzer (7) comprises a sample injection pipeline, a cleaning pipeline and a waste liquid pipeline; the cleaning pipeline is connected with the pure water pipeline (3), the sampling pipelines are respectively connected with the sample overflow tanks (6), and the waste liquid pipeline is connected with the salt mud tank (8).
2. 2. The online detection device for double-alkali concentration of multi-flow-path brine according to claim 1, wherein the miniature Kai-membrane filter (5) comprises a tank body (501), a Kai-membrane filter element (502) and a tube plate (503) fixed at the top end of the Kai-membrane filter element (502).
3. 3. The online detection device for double-alkali concentration of multi-flow-path brine is characterized in that the inside of the tank body (501) is hollow, the upper end of the tank body is open, the Keel membrane filter element (502) extends into the tank body (501) from the upper end of the tank body (501), and the tube plate (503) is clamped at the opening of the upper end of the tank body (501).
4. 4. The online detection device for double-alkali concentration of multi-flow-path brine according to claim 2, wherein a liquid inlet (504) is formed in the lower end of the side wall of the tank body (501), and the liquid inlet (504) is communicated with the crude brine sampling pipeline (1).
5. 5. The online detection device for double-alkali concentration of multi-flow-path brine according to claim 2, wherein the upper end of the side wall of the tank body (501) is respectively provided with a sample overflow port (505), a sample recovery port (506) and an exhaust port (507), and the bottom of the tank body (501) is provided with a funnel-shaped clean discharge port (508).
6. 6. The multi-flow-path brine double-alkali concentration online detection device according to claim 5, wherein the sample overflow port (505) is communicated with a crude brine sampling pipeline (1).
7. 7. The multi-channel brine double-alkali concentration online detection device according to claim 5, wherein the sample recovery port (506) and the exhaust port (507) are connected with the brine middle tank (9) through a pipeline.
8. 8. The multi-flow-path brine double-alkali concentration online detection device according to claim 1, wherein a sample injection switching valve (701) is installed on the sample injection pipeline.

Description

Multi-flow-path brine double-alkali concentration on-line detection device Technical Field The utility model belongs to the technical field of chlor-alkali detection, and relates to a multi-flow-path brine double-alkali concentration online detection device. Background In the chlor-alkali production process, the brine double-alkali concentration refers to the content ratio of two alkaline substances in brine in the chemical production process of brine refining and the like, and in actual production, the control of the brine double-alkali concentration is important. In order to remove impurities such as calcium ions and magnesium ions in brine, for example, in the chlor-alkali industry, a proper amount of sodium hydroxide and sodium carbonate are required to be added, and a proper double-alkali concentration can ensure the effect of removing the impurities, and meanwhile, unnecessary raw material waste and subsequent processing difficulties are avoided, so that accurate detection of the double-alkali concentration of the brine is important for ensuring the quality and the production efficiency of the product. At present, the manual periodic sampling detection mode is widely adopted in the industry to acquire the brine double-alkali concentration data, the method is time-consuming and labor-consuming, the detection frequency is low, and the dynamic change of the brine double-alkali concentration in the production process cannot be reflected in real time. Part of the existing online detection devices can realize automatic detection to a certain extent, but have the problem of single flow path and poor effect of a sample pretreatment system, and the problem of difficulty in simultaneously meeting the requirement of rapid detection of brine in multiple flow paths is caused, so that in actual production, when the brine in multiple flow paths is required to be detected, frequent manual intervention is required to detect the flow paths, and the detection efficiency and the production continuity are seriously affected. Disclosure of utility model The utility model aims to provide a multi-flow-path brine double-alkali concentration online detection device, which solves the problems of single flow path and inaccurate detection in the double-alkali concentration detection in the prior art. The technical scheme includes that the online detection device for double-alkali concentration of multi-flow-path brine comprises a crude brine sampling pipeline, a refined brine sampling pipeline, a pure water pipeline and a double-alkali online analyzer, wherein a fluorine lining ball valve and a miniature Kai membrane filter are arranged on the crude brine sampling pipeline, one or more crude brine sampling pipelines and one or more refined brine sampling pipelines are arranged on the crude brine sampling pipeline, liquid outlets of the crude brine sampling pipeline and liquid outlets of the refined brine sampling pipeline are respectively connected with a sample overflow tank, the double-alkali online analyzer comprises a sampling pipeline, a cleaning pipeline and a waste liquid pipeline, the cleaning pipeline is connected with the pure water pipeline, the sampling pipeline is multiple, the sampling pipelines are respectively connected with the sample overflow tanks, and the waste liquid pipeline is connected with the salt mud tank. The utility model is also characterized in that: The miniature Kai membrane filter comprises a tank body and a Kai membrane filter element, wherein the tank body is hollow and is provided with an opening at the upper end, a tube plate is fixedly arranged at the top of the Kai membrane filter element, the outline dimension of the tube plate is larger than the opening dimension of the upper end of the tank body, the Kai membrane filter element extends into the tank body from the upper end of the tank body, and the tube plate is clamped at the opening of the upper end of the tank body. The lower extreme of jar body lateral wall has the inlet, and inlet intercommunication crude brine sampling pipeline. The upper end of the side wall of the tank body is respectively provided with a sample overflow port, a sample recovery port and an exhaust port, and the bottom of the tank body is provided with a funnel-shaped clean discharge port. The sample overflow port is a liquid outlet of the miniature Kai membrane filter, and the liquid outlet is communicated with the crude brine sampling pipeline. The sample recovery port is connected with the salt water middle tank through a pipeline. And a sample injection switching valve is arranged on the sample injection pipe. The sample injection switching valve comprises electromagnetic valves arranged on different sample injection pipelines. The beneficial effects of the utility model are as follows: The utility model realizes the on-line detection and the switching of detection routes of the content of the crude brine component in the reaction tank in the primary brine pro