Chlor-alkali production dechlorination tower device capable of analyzing, sampling and recycling

Abstract

A chlor-alkali production dechlorination tower device capable of analyzing, sampling and recycling is characterized in that the device receives chlorine-containing liquid and treats the chlorine-containing liquid; the device comprises: a dechlorination tower for dechlorinating a chlorine-containing liquid; the water inlet module is connected with the dechlorination tower and is used for receiving the chlorine-containing liquid and directly conveying the chlorine-containing liquid to the dechlorination tower or cooling the chlorine-containing liquid and conveying the chlorine-containing liquid to the dechlorination tower after pH detection; the dechlorination tower gas phase outlet is formed in the top of the dechlorination tower and is used for outputting chlorine gas; and the recovery module is arranged at the lower part of the dechlorination tower and is used for recovering the dechlorinated liquid. The device has the advantages of energy conservation, consumption reduction and environmental protection.

Description

TECHNICAL FIELD

[0001] The utility model relates to chlor alkali production technical field especially relates to a kind of chlor alkali production dechlorination tower device of reusable analysis sampling. BACKGROUND

[0002] At present, in chlor alkali production process, the pH value of light brine sampling before dechlorination is controlled between 1~2, and the light brine enters into plate exchange, and because the negative pressure of dechlorination tower is between-70KPa~-80KPa, the large negative pressure leads to that the light brine pipeline of entering plate exchange is not smooth and cannot enter instrument measurement, causing detection distortion. Chlorine gas in light brine is discharged into chlorine water tank, a large amount of waste chlorine gas enters into secondary potassium system, leading to waste of chlorine gas, and increasing environmental protection disposal pressure. Thus, the running condition of electrolytic cell and the dechlorination running condition cannot be monitored. How to propose a kind of chlor alkali production dechlorination tower device of reusable analysis sampling becomes a problem to be solved urgently. SUMMARY

[0003] The purpose of the application is to provide a kind of chlor alkali production dechlorination tower device of reusable analysis sampling, with the advantages of energy saving and environmental protection.

[0004] To achieve the above object, the application provides a kind of chlor alkali production dechlorination tower device of reusable analysis sampling, the device receives chlorine-containing liquid and processes it;The device comprises: a dechlorination tower for dechlorination of chlorine-containing liquid;Water inlet module connected with the dechlorination tower, receiving chlorine-containing liquid, directly transmitting to the dechlorination tower or cooling the chlorine-containing liquid, PH detection and then transmitting to the dechlorination tower;Dechlorination tower gas phase outlet, set at the top of the dechlorination tower, for outputting chlorine gas;Recovery module, set at the lower part of the dechlorination tower, for recovering the dechlorinated liquid.

[0005] Preferably, the water inlet module comprises: a dechlorination tower water inlet pipeline connected with the dechlorination tower, receiving chlorine-containing liquid and directly transmitting to the dechlorination tower;A sampling heat exchange module connected with the dechlorination tower water inlet pipeline and the dechlorination tower respectively, receiving chlorine-containing liquid, cooling the chlorine-containing liquid, PH detection and then transmitting to the dechlorination tower.

[0006] Preferably, the sampling heat exchange module comprises: a sampling plate heat exchanger connected with the dechlorination tower water inlet pipeline and the dechlorination tower respectively;A heat exchanger inlet valve set on the passage of the dechlorination tower water inlet pipeline and the sampling plate heat exchanger, for controlling the flow rate of chlorine-containing liquid;A heat exchanger outlet valve set on the passage of the dechlorination tower and the sampling plate heat exchanger, for controlling the flow rate of treated chlorine-containing liquid.

[0007] Preferably, the sampling heat exchange module further comprises: a circulation pipeline penetrating through the inside of the sampling plate heat exchanger, which can pass through circulating water inside;And a circulating water outlet valve and a circulating water inlet valve set at both ends of the circulation pipeline, for controlling the flow rate of circulating water.

[0008] Preferably, the circulating water is transported from bottom to top.

[0009] Preferably, the sampling heat exchange module further includes a pH meter, which is installed in the passage between the sampling plate heat exchanger and the heat exchanger outlet valve, for detecting the pH value of the chlorine-containing liquid.

[0010] Preferably, the recovery module includes: a brine pump outlet pipeline, located at the bottom of the dechlorination tower, for exporting the dechlorinated liquid for recycling.

[0011] Preferably, the device further includes a level gauge, one end of which is connected to the middle of the dechlorination tower and the other end of which is connected to the bottom of the dechlorination tower.

[0012] In summary, compared with the prior art, the present invention provides the following beneficial effects:

[0013] First, the liquid in the dechlorination tower inlet pipeline of this utility model can automatically flow by gravity and be controlled by a valve to achieve normal pH detection.

[0014] Secondly, this invention can recover chlorine-containing brine to a dechlorination tower for dechlorination, thereby turning waste chlorine into original chlorine and promoting the reuse of chlorine gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a dechlorination tower device for chlor-alkali production that can be analyzed, sampled, and reused, as proposed in this utility model.

[0016] Figure label:

[0017] 1-Dechlorination tower inlet pipeline, 2-Heat exchanger inlet valve, 3-Sampling plate heat exchanger, 4-Circulating water outlet valve, 5-Circulating water inlet valve, 6-Heat exchanger outlet valve, 7-Brine pump outlet pipeline, 8-Dechlorination tower gas phase outlet, 9-Dechlorination tower, 10-Level gauge. Detailed Implementation

[0018] The following will be combined with the appendix in the embodiments of the present invention. Figure 1 The technical solutions, structural features, objectives and effects achieved in the embodiments of the present invention will be described in detail.

[0019] It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions. They are only used to facilitate and clarify the purpose of illustrating the embodiments of the present invention, and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationship, or adjustments to the size should still fall within the scope of the technical content disclosed in the present invention, provided that they do not affect the effects and objectives that the present invention can produce.

[0020] It is to be noted that the relative terms such as first and second and the like in the present disclosure are used only to differentiate one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus including a list of elements includes not only those elements that are explicitly listed, but also other elements that are not explicitly listed, or other elements inherent in such a process, method, article or apparatus.

[0021] The utility model provides a kind of dechlorination tower device of chlor-alkali production can be analyzed sampling reuse, the device receives chlorine-containing liquid (for example, before dechlorination light brine), and it is sampled, dechlorination, recycling operation;With the advantages of energy saving and environmental protection.

[0022] Specifically, the device comprises:

[0023] Dechlorination tower 9, chlorine-containing liquid is dechlorinated;

[0024] Water inlet module, connected with dechlorination tower 9, receives chlorine-containing liquid, directly transmits to dechlorination tower 9 or transmits to dechlorination tower 9 after cooling treatment and PH detection to chlorine-containing liquid;

[0025] Dechlorination tower gas phase outlet 8, set at the top of dechlorination tower 9, for outputting chlorine gas;

[0026] Recycling module, set at the lower part of dechlorination tower 9, recycles liquid after dechlorination.

[0027] Specifically, the water inlet module comprises:

[0028] Dechlorination tower water inlet pipeline 1, connected with dechlorination tower 9, receives chlorine-containing liquid, and directly transmits to dechlorination tower 9;

[0029] Sampling heat exchange module, connected with dechlorination tower water inlet pipeline 1 and dechlorination tower 9 respectively, receives chlorine-containing liquid, transmits to dechlorination tower 9 after cooling treatment and PH detection to chlorine-containing liquid.

[0030] In preferred embodiments, the sampling heat exchange module comprises:

[0031] Sampling plate heat exchanger 3, connected with dechlorination tower water inlet pipeline 1 and dechlorination tower 9 respectively;Wherein, the sampling principle of sampling plate heat exchanger 3 is that when fluid flows in the heat exchanger, a certain amount of sample can be taken from the fluid without affecting the normal operation of the heat exchanger through the control of sampling port and sampling valve. For example, in chemical production, the composition, temperature, concentration and other parameters of the material in the heat exchanger can be analyzed by sampling, so as to monitor and adjust the production process in real time.

[0032] The heat exchanger inlet valve 2 is arranged on the passage between the dechlorination tower water inlet pipeline 1 and the sampling plate heat exchanger 3, and is used for controlling the flow rate of the chlorine-containing liquid.

[0033] The heat exchanger outlet valve 6 is arranged on the passage between the dechlorination tower 9 and the sampling plate heat exchanger 3, and is used for controlling the flow rate of the treated chlorine-containing liquid.

[0034] Further, in order to enhance the heat exchange efficiency of the sampling plate heat exchanger 3, the sampling heat exchange module further comprises a circulating pipeline penetrating through the inside of the sampling plate heat exchanger 3, which is internally accessible to circulating water; and a circulating water outlet valve 4 and a circulating water inlet valve 5 arranged at both ends of the circulating pipeline, and used for controlling the flow rate of the circulating water. It should be noted here that the circulating water must be transmitted from bottom to top to ensure excellent circulation effect.

[0035] In addition, the sampling heat exchange module further comprises a PH detector arranged on the passage between the sampling plate heat exchanger 3 and the heat exchanger outlet valve 6, and used for detecting the pH value of the chlorine-containing liquid.

[0036] The principle here is that, in the dechlorination tower water inlet pipeline 1, the chlorine-containing liquid is received and directly transmitted to the dechlorination tower 9; by controlling the heat exchanger inlet valve 2, part of the chlorine-containing liquid is subjected to cooling treatment and PH detection, and then it is judged whether it meets the current reaction situation. If it meets, the current situation is maintained, and the chlorine-containing liquid is input to the dechlorination tower 9 through the dechlorination tower water inlet pipeline 1 and the sampling plate heat exchanger 3. If it does not meet, the corresponding flow rate is controlled by adjusting the heat exchanger inlet valve 2 and the heat exchanger outlet valve 6, and adjustment is made; here is the prior art, which will not be described here.

[0037] In specific embodiments, the recycling module comprises:

[0038] The dilute brine pump outlet pipeline 7 is arranged at the bottom of the dechlorination tower 9, and is used for leading out the dechlorinated liquid for recycling.

[0039] Further, in order to measure the height of the liquid inside the dechlorination tower 9 at all times, the device further comprises a liquid level meter 10 connected at one end to the middle of the dechlorination tower 9 and at the other end to the bottom of the dechlorination tower. The utility model adopts a static pressure type liquid level meter based on the principle of liquid static pressure, and the pressure generated by the liquid at the bottom of the container or at a certain depth is proportional to the liquid level height, and the liquid level is calculated by measuring the pressure.

[0040] Although the content of the present application has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present application. After reading the above content, various modifications and alternatives of the present application will be apparent to those skilled in the art. Therefore, the protection scope of the present application should be defined by the appended claims.

Claims

1. A chlor-alkali production dechlorination column device that can be analyzed for sampling return, characterized by, The device receives and processes chlorine-containing liquid; the device comprises: a dechlorination tower (9) for dechlorination of the chlorine-containing liquid; a water inlet module connected to the dechlorination tower (9) for receiving the chlorine-containing liquid and directly transmitting the chlorine-containing liquid to the dechlorination tower (9) or transmitting the chlorine-containing liquid to the dechlorination tower (9) after cooling treatment and PH detection; a dechlorination tower gas phase outlet (8) arranged at the top of the dechlorination tower (9) for outputting chlorine gas; a recovery module arranged at the lower part of the dechlorination tower (9) for recovering the dechlorinated liquid.

2. A dechlorination column device for chlor-alkali production capable of analyzing sampling and recycling according to claim 1, characterized in that, The water inlet module comprises: a dechlorination tower water inlet pipeline (1) connected to the dechlorination tower (9) for receiving the chlorine-containing liquid and directly transmitting the chlorine-containing liquid to the dechlorination tower (9); a sampling heat exchange module connected to the dechlorination tower water inlet pipeline (1) and the dechlorination tower (9) respectively for receiving the chlorine-containing liquid and transmitting the chlorine-containing liquid to the dechlorination tower (9) after cooling treatment and PH detection.

3. A dechlorination column device for chlor-alkali production capable of analyzing sampling and recycling according to claim 2, characterized in that, The sampling heat exchange module comprises: a sampling plate heat exchanger (3) connected to the dechlorination tower water inlet pipeline (1) and the dechlorination tower (9) respectively; a heat exchanger inlet valve (2) arranged on the passage between the dechlorination tower water inlet pipeline (1) and the sampling plate heat exchanger (3) for controlling the flow rate of the chlorine-containing liquid; a heat exchanger outlet valve (6) arranged on the passage between the dechlorination tower (9) and the sampling plate heat exchanger (3) for controlling the flow rate of the treated chlorine-containing liquid.

4. A dechlorination column device for chlor-alkali production capable of analyzing sampling and recycling according to claim 3, characterized in that, The sampling heat exchange module further comprises: a circulating pipeline penetrating through the inside of the sampling plate heat exchanger (3), and the inside of which can pass circulating water; and a circulating water outlet valve (4) and a circulating water inlet valve (5) arranged at both ends of the circulating pipeline for controlling the flow rate of the circulating water.

5. A dechlorination column device for chlor-alkali production capable of analyzing sampling and reuse according to claim 4, characterized in that, The circulating water is transmitted from bottom to top.

6. A dechlorination column device for chlor-alkali production capable of analyzing sampling and reuse according to claim 5, characterized in that, The sampling heat exchange module further comprises: a PH detection meter arranged on the passage between the sampling plate heat exchanger (3) and the heat exchanger outlet valve (6) for detecting the pH value of the chlorine-containing liquid.

7. A dechlorination column device for chlor-alkali production capable of analyzing sampling and reuse according to claim 6, characterized in that, The recovery module comprises: a fresh brine pump outlet pipeline (7) arranged at the bottom of the dechlorination tower (9) for leading out the dechlorinated liquid for recycling.

8. A dechlorination column device for chlor-alkali production capable of analyzing sampling and reuse according to claim 7, characterized in that, The device further comprises: a liquid level meter (10) connected to the middle part of the dechlorination tower (9) at one end and connected to the bottom of the dechlorination tower at the other end.

Images