Alkali liquor concentration analysis system

Abstract

The utility model provides an alkali liquor concentration analysis system which comprises a valve group which comprises a first valve group, a second valve group and a third valve group, the alkali liquor concentration analyzer is respectively communicated with the first valve group, the second valve group and the third valve group; and the control module is electrically connected with the first valve group, the second valve group, the third valve group and the alkali liquor concentration analyzer respectively. Liquid circulating pipelines of the absorption tower, the finished product tower and the liquid chlorine waste gas tower are communicated and share the same alkali liquor concentration analyzer, so that the utilization rate of the alkali liquor concentration analyzer is improved, and the cost is reduced; an absorption tower circulating liquid, a finished product tower circulating liquid and a liquid chlorine waste gas tower circulating liquid are respectively controlled to independently circulate through a first valve group, a second valve group and a third valve group; the alkali liquor concentration analyzer is controlled by the control module to automatically and accurately analyze the content of free alkali / available chlorine in the absorption tower circulating liquid, the finished product tower circulating liquid and the liquid chlorine waste gas tower circulating liquid, so that the qualified rate of sodium hypochlorite finished products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolysis, in particular to an alkali solution concentration analysis system. Background Art

[0002] According to the current production safety requirements, the electrolytic waste gas absorption device and the liquid chlorine waste gas absorption device must be two independent absorption devices. Since an alkali solution concentration analyzer is required for waste gas absorption, an on-line alkali solution concentration analyzer needs to be installed in each of the above two absorption devices. However, the price of an on-line alkali solution concentration analyzer is relatively expensive, and the cost will be even higher if two are installed.

[0003] In addition, during the production process of sodium hypochlorite finished products, the free alkali / available chlorine concentration is monitored in real time. The concentration change during the production process of sodium hypochlorite finished products is reflected by an oxidation-reduction potentiometer, which is not convenient for directly obtaining the free alkali / available chlorine content of sodium hypochlorite finished products, thus possibly resulting in unqualified sodium hypochlorite finished products due to insufficient monitoring.

[0004] Therefore, the utility model provides an alkali solution concentration analysis system to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an alkali solution concentration analysis system to solve the problems in the above background art that the cost of configuring an on-line alkali solution concentration analyzer for the existing waste gas absorption device is relatively high, and in addition, the free alkali / available chlorine content in sodium hypochlorite finished products is not convenient to directly obtain, thus possibly resulting in unqualified sodium hypochlorite finished products due to insufficient monitoring.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An alkali solution concentration analysis system, comprising:

[0008] A valve group, which includes a first valve group, a second valve group and a third valve group;

[0009] An alkali solution concentration analyzer, which is respectively communicated with the first valve group, the second valve group and the third valve group;

[0010] A control module, which is electrically connected to the first valve group, the second valve group, the third valve group and the alkali solution concentration analyzer respectively.

[0011] Preferably, the first valve group includes a first sampling valve and a first sample outlet valve; the first sampling valve is arranged on the upper liquid pipe of the absorption tower, and the first sample outlet valve is arranged on the return liquid pipe of the absorption tower. A first circulation pump is arranged on the upper liquid pipe of the absorption tower.

[0012] Preferably, the second valve group includes a second sampling valve and a second sample outlet valve; the second sampling valve is arranged on the upper liquid pipe of the finished product tower, and the second sample outlet valve is arranged on the return liquid pipe of the finished product tower, wherein a second circulation pump is arranged on the upper liquid pipe of the finished product tower.

[0013] Preferably, the third valve group includes a third sampling valve and a third sample outlet valve; the third sampling valve is arranged on the upper liquid pipe of the liquid chlorine waste gas tower, and the third sample outlet valve is arranged on the return liquid pipe of the liquid chlorine waste gas tower, wherein a third circulation pump is arranged on the upper liquid pipe of the liquid chlorine waste gas tower.

[0014] Preferably, the upper liquid pipes of the absorption tower, the finished product tower, and the liquid chlorine waste gas tower and the return liquid pipes of the absorption tower, the finished product tower, and the liquid chlorine waste gas tower are connected and communicated through a first connecting pipe, and the caustic soda concentration analyzer is arranged on the first connecting pipe.

[0015] Preferably, a filter is further arranged on the first connecting pipe.

[0016] Preferably, the control module is a DCS.

[0017] Preferably, a data display window is arranged in the DCS, and the data display window includes an absorption tower data display window, a finished product tower data display window, and a liquid chlorine waste gas tower data display window.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: The liquid circulation pipelines of the absorption tower, the finished product tower, and the liquid chlorine waste gas tower are connected and communicated, so that they share the same caustic soda concentration analyzer, improving the utilization rate of the caustic soda concentration analyzer and reducing the cost; and the circulation liquid of the absorption tower, the circulation liquid of the finished product tower, and the circulation liquid of the liquid chlorine waste gas tower are respectively controlled to flow independently through the first valve group, the second valve group, and the third valve group, and the control module controls the caustic soda concentration analyzer to automatically and accurately analyze the free alkali / available chlorine content in the circulation liquid of the absorption tower, the circulation liquid of the finished product tower, and the circulation liquid of the liquid chlorine waste gas tower, ensuring the qualification rate of the sodium hypochlorite finished product. This caustic soda concentration analyzer can not only analyze the caustic soda concentration in real time, but also analyze the chlorine concentration in the circulation liquid, improving the use value of the caustic soda concentration analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the system according to the embodiment of the present utility model;

[0021] Figure 2 This is the control flow chart of the DCS for the valve group in the embodiment of the present utility model;

[0022] Figure 3 This is the schematic diagram of adding the original detection structure in the embodiment of the present utility model.

[0023] Reference numerals:

[0024] 10. Valve group; 101. First valve group; 1011. First sampling valve; 1012. First sample outlet valve; 102. Second valve group; 1021. Second sampling valve; 1022. Second sample outlet valve; 103. Third valve group; 1031. Third sampling valve; 1032. Third sample outlet valve;

[0025] 20. Alkaline solution concentration analyzer;

[0026] 30. Absorption tower upper liquid pipe; 31. Absorption tower return liquid pipe; 32. Product tower upper liquid pipe; 33. Product tower return liquid pipe; 34. Liquid chlorine waste gas tower upper liquid pipe; 35. Liquid chlorine waste gas tower return liquid pipe;

[0027] 40. First connecting pipe;

[0028] 50. Filter. Detailed implementation manners

[0029] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0030] In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0031] In the present utility model, unless otherwise clearly defined and limited, terms such as "connected" and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0033] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0034] As Figures 1 - 2 shown, the embodiment of the present utility model provides an alkali liquor concentration analysis system, including:

[0035] A valve group 10, the valve group 10 includes a first valve group 101, a second valve group 102 and a third valve group 103;

[0036] An alkali liquor concentration analyzer 20, which is respectively communicated with the first valve group 101, the second valve group 102 and the third valve group 103;

[0037] A control module, which is electrically connected to the first valve group 101, the second valve group 102, the third valve group 103 and the alkali liquor concentration analyzer 20 respectively.

[0038] It should be noted that the first valve group 101, the second valve group 102 and the third valve group 103 are all in a normally closed state.

[0039] When detecting the alkali liquor concentration of the absorption tower, the second valve group 102 and the third valve group 103 both remain closed, and the control module controls to open the first valve group 101 and controls the alkali liquor concentration analyzer 20 to analyze the circulating liquid of the absorption tower; when detecting the alkali liquor concentration of the finished product tower, the first valve group 101 and the third valve group 103 both remain closed, and the control module controls to open the second valve group 102 and controls the alkali liquor concentration analyzer 20 to analyze the circulating liquid of the finished product tower; when detecting the alkali liquor concentration of the liquid chlorine waste gas tower, the first valve group 101 and the second valve group 102 both remain closed, and the control module controls to open the third valve group 103 and controls the alkali liquor concentration analyzer 20 to analyze the circulating liquid of the liquid chlorine waste gas tower.

[0040] Connect the liquid circulation pipelines of the absorption tower, the finished product tower, and the liquid chlorine waste gas tower, so that they share the same caustic liquor concentration analyzer 20, improving the utilization rate of the caustic liquor concentration analyzer 20 and reducing costs; and respectively control the separate circulation of the absorption tower circulating liquid, the finished product tower circulating liquid, and the liquid chlorine waste gas tower circulating liquid through the first valve group 101, the second valve group 102, and the third valve group 103. The control module controls the caustic liquor concentration analyzer 20 to automatically and accurately analyze the free alkali / available chlorine content in the absorption tower circulating liquid, the finished product tower circulating liquid, and the liquid chlorine waste gas tower circulating liquid, ensuring the qualified rate of sodium hypochlorite finished products. The caustic liquor concentration analyzer 20 can not only analyze the caustic liquor concentration in real time, but also analyze the chlorine concentration in the circulating liquid, improving the use value of the caustic liquor concentration analyzer 20.

[0041] Further, the first valve group 101 includes a first sampling valve 1011 and a first discharging valve 1012; the first sampling valve 1011 is arranged on the upper liquid pipe 30 of the absorption tower, and the first discharging valve 1012 is arranged on the return liquid pipe 31 of the absorption tower, wherein a first circulation pump is arranged on the upper liquid pipe 30 of the absorption tower.

[0042] When the caustic liquor concentration detection of the absorption tower is put into use, the control module first controls the opening of the first discharging valve 1012, and then controls the opening of the first sampling valve 1011. The absorption tower circulating liquid is circulated in the upper liquid pipe 30 and the return liquid pipe 31 of the absorption tower through the first circulation pump to ensure that the liquid will not be blocked in the pipe; when it is out of use, the control module first controls the closing of the first sampling valve 1011, and then closes the first discharging valve 1012 to prevent liquid residue in the pipe.

[0043] Further, the second valve group 102 includes a second sampling valve 1021 and a second discharging valve 1022; the second sampling valve 1021 is arranged on the upper liquid pipe 32 of the finished product tower, and the second discharging valve 1022 is arranged on the return liquid pipe 33 of the finished product tower, wherein a second circulation pump is arranged on the upper liquid pipe 32 of the finished product tower.

[0044] When the caustic liquor concentration detection of the finished product tower is put into use, the control module first controls the opening of the second discharging valve 1022, and then controls the opening of the second sampling valve 1021. The finished product tower circulating liquid is circulated in the upper liquid pipe 32 and the return liquid pipe 33 of the finished product tower through the second circulation pump to ensure that the liquid will not be blocked in the pipe; when it is out of use, the control module first controls the closing of the second sampling valve 1021, and then closes the second discharging valve 1022 to prevent liquid residue in the pipe.

[0045] Further, the third valve group 103 includes a third sampling valve 1031 and a third discharging valve 1032; the third sampling valve 1031 is arranged on the upper liquid pipe 34 of the liquid chlorine waste gas tower, and the third discharging valve 1032 is arranged on the return liquid pipe 35 of the liquid chlorine waste gas tower, wherein a third circulation pump is arranged on the upper liquid pipe 34 of the liquid chlorine waste gas tower.

[0046] When the caustic soda solution concentration of the liquid chlorine waste gas tower is detected, the control module first controls the opening of the third sampling valve 1032, and then controls the opening of the third injection valve 1031. The circulating liquid of the finished product tower is circulated through the upper liquid pipe 34 of the liquid chlorine waste gas tower and the return liquid pipe 35 of the liquid chlorine waste gas tower by the third circulation pump to ensure that the liquid will not be blocked in the pipe. When it is out of use, the control module first controls the closing of the third injection valve 1031, and then closes the third sampling valve 1032 to prevent liquid residue in the pipe.

[0047] In order to simplify the system structure and realize the connection of the liquid circulation pipelines of the absorption tower, the finished product tower and the liquid chlorine waste gas tower, the upper liquid pipe 30 of the absorption tower, the upper liquid pipe 32 of the finished product tower, the upper liquid pipe 34 of the liquid chlorine waste gas tower and the return liquid pipe 31 of the absorption tower, the return liquid pipe 33 of the finished product tower, and the return liquid pipe 35 of the liquid chlorine waste gas tower are connected through the first connecting pipe 40, and the caustic soda solution concentration analyzer 20 is arranged on the first connecting pipe 40.

[0048] Furthermore, a filter 50 is also arranged on the first connecting pipe 40 to ensure that there are no solid particles in the circulating liquid passing through the caustic soda solution concentration analyzer 20 that can interfere with the operation of the caustic soda solution concentration analyzer 20.

[0049] Furthermore, the control module is a DCS.

[0050] Specifically, a data display window is arranged in the DCS. The data display window includes an absorption tower data display window, a finished product tower data display window, and a liquid chlorine waste gas tower data display window, which are respectively used to display the caustic soda solution concentration detection data of the absorption tower, the caustic soda solution concentration detection data of the finished product tower, and the caustic soda solution concentration detection data of the liquid chlorine waste gas tower.

[0051] More specifically, a real-time change curve of the caustic soda solution concentration, a real-time change curve of the chlorine concentration, an analysis button, a commissioning button, and a decommissioning button are arranged in the data display window.

[0052] During use, the DCS controls the caustic soda solution concentration analyzer 20 to automatically switch the analysis target. After the caustic soda solution concentration analyzer 20 analyzes the free alkali / available chlorine concentration in the circulating liquid, the data is returned to the data display window of the DCS for display.

[0053] It should be noted that, such as Figure 3As shown, the original lye concentration detection structure uses three ORP analyzers to measure the redox potential value to indirectly obtain the free alkali / available chlorine content in the sodium hypochlorite finished product. The lye concentration analysis system of the present application can be directly added to the original lye concentration detection structure without major modification to the original structure, avoiding an increase in workload. At the same time, the free alkali / available chlorine content in the sodium hypochlorite finished product obtained by the ORP analyzer can be used as reference data. If there is a large difference between the reference data and the data measured by the lye concentration analyzer 20, it can be considered whether the lye concentration analyzer 20 has an abnormality, providing guarantee for the normal operation of the lye concentration analyzer 20.

[0054] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A alkali solution concentration analysis system, characterized in that: include: A valve group (10), the valve group (10) comprising a first valve group (101), a second valve group (102) and a third valve group (103); an alkaline solution concentration analyzer (20), respectively connected to the first valve group (101), the second valve group (102) and the third valve group (103); The control module is electrically connected to the first valve group (101), the second valve group (102), the third valve group (103) and the alkali solution concentration analyzer (20) respectively.

2. The alkali solution concentration analysis system according to claim 1, characterized in that: The first valve group (101) comprises a first injection valve (1011) and a first sample outlet valve (1012); the first injection valve (1011) is arranged on an upper liquid pipe (30) of an absorption tower, and the first sample outlet valve (1012) is arranged on a liquid return pipe (31) of an absorption tower, wherein a first circulation pump is arranged on the upper liquid pipe (30) of the absorption tower.

3. The alkali solution concentration analysis system according to claim 2, characterized in that: The second valve group (102) comprises a second injection valve (1021) and a second sample outlet valve (1022); the second injection valve (1021) is arranged on the liquid pipe (32) on the finished product tower, and the second sample outlet valve (1022) is arranged on the liquid return pipe (33) on the finished product tower, wherein a second circulation pump is arranged on the liquid pipe (32) on the finished product tower.

4. The alkali solution concentration analysis system according to claim 3, characterized in that: The third valve group (103) comprises a third injection valve (1031) and a third sample outlet valve (1032); the third injection valve (1031) is arranged on the upper liquid pipe (34) of the liquid chlorine waste gas tower, and the third sample outlet valve (1032) is arranged on the liquid return pipe (35) of the liquid chlorine waste gas tower, wherein a third circulation pump is arranged on the upper liquid pipe (34) of the liquid chlorine waste gas tower.

5. The alkali solution concentration analysis system according to claim 4, characterized in that: The absorption tower upper liquid pipe (30), the finished product tower upper liquid pipe (32), the liquid chlorine waste gas tower upper liquid pipe (34) and the absorption tower return liquid pipe (31), the finished product tower return liquid pipe (33), and the liquid chlorine waste gas tower return liquid pipe (35) are connected via a first connecting pipe (40), and the alkali solution concentration analyzer (20) is arranged on the first connecting pipe (40).

6. The alkali solution concentration analysis system according to claim 5, characterized in that: The first connecting pipe (40) is also provided with a filter (50).

7. The alkali solution concentration analysis system according to claim 1, characterized in that: The control module is a DCS.

8. The alkali solution concentration analysis system according to claim 7, characterized in that: The DCS is provided with data display windows, which include an absorption tower data display window, a finished product tower data display window and a liquid chlorine waste gas tower data display window.

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