Safety device for recycling sampled saline water and waste chlorine in potassium alkali production electrolytic bath

Abstract

The utility model relates to a safety device for recycling sampled saline water and waste chlorine in a potassium alkali production electrolytic bath. The device is respectively connected with an electrolytic bath anode inlet pipeline and an electrolytic bath anode outlet pipeline; the electrolytic cell anode inlet pipeline and the electrolytic cell anode outlet pipeline are respectively connected with the electrolytic cell; the recycling safety device comprises a chlorine separation module, a sampling and recycling module, a discharging module and an electrolytic bath pipeline balancing module. According to the utility model, saline water and chlorine in chlorine-containing light salt brine sampled by the electrolytic bath can be respectively recovered into the system, and the device has the advantages of simple structure and convenience in operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of potassium base production technology, especially to a kind of potassium base production electrolytic cell sampling brine and waste chlorine recycling safety device. BACKGROUND

[0002] Currently, in the potassium base production process, brine samples are taken from the anode inlet and dilute brine samples are taken from the anode outlet of the electrolytic cell every day. The mixed brine at the anode after each sampling is considered as residual liquid, and the chlorine-containing brine liquid is discharged into a ditch.

[0003] Long-term production can cause waste of materials, increase costs and be not conducive to production and operation. At the same time, during the sampling process, the sampling barrel needs to be moved manually, and the brine contains free chlorine corrosive substances, which can cause personal injury and clothing corrosion during movement. The electrolytic cell temperature is controlled at 83±2℃, and the high-temperature brine carries a large amount of chlorine. The chlorine-containing brine releases air, and long-term contact with the human respiratory mucosa can cause damage. Long-term contact or inhalation of high-concentration chlorine gas can cause bronchitis, pulmonary edema and other diseases.

[0004] How to propose a scheme for a potassium base production electrolytic cell sampling brine and waste chlorine recycling safety device to solve the above problems has become a difficult problem to be solved. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims to provide a kind of potassium base production electrolytic cell sampling brine and waste chlorine recycling safety device, can the chlorine-containing dilute brine of electrolytic cell sampling brine and chlorine gas are recycled into system respectively, with the advantages of simple structure and convenient operation.

[0006] To achieve the above object, the utility model provides a kind of potassium base production electrolytic cell sampling brine and waste chlorine recycling safety device, the device is connected electrolytic cell anode inlet pipeline and electrolytic cell anode outlet pipeline respectively;Electrolytic cell anode inlet pipeline and electrolytic cell anode outlet pipeline are connected with electrolytic cell respectively;The recycling safety device includes: chlorine gas separation module, the chlorine gas separation module is connected with electrolytic cell anode outlet pipeline, receives chlorine-containing product from electrolytic cell anode outlet pipeline, and separates it;Sampling recovery module, the sampling recovery module is connected with electrolytic cell anode inlet pipeline and electrolytic cell anode outlet pipeline respectively, receives chlorine-containing product from electrolytic cell anode inlet pipeline and electrolytic cell anode outlet pipeline, and carries out sampling detection and gas-liquid separation;Discharge module, the discharge module is connected with sampling recovery module, receives the product after gas-liquid separation from sampling recovery module respectively, and carries out storage and transmission;Electrolytic cell pipeline balance module, one end of the electrolytic cell pipeline balance module is connected electrolytic cell anode outlet pipeline, the other end is connected electrolytic cell anode inlet pipeline, and the gas pressure between electrolytic cell anode inlet pipeline and electrolytic cell anode outlet pipeline is balanced.

[0007] Preferably, the drain tank module comprises: a drain tank connected with the sampling recovery module, receiving liquid from the sampling recovery module; a waste chlorine gas balance pipe arranged at the upper part of the drain tank and connected with the sampling recovery module, receiving gas from the drain tank and the sampling recovery module and performing secondary transmission.

[0008] Preferably, the chlorine gas separation module comprises: an anode suspension separator connected with the electrolytic tank anode outlet pipeline, receiving chlorine-containing products from the electrolytic tank anode outlet pipeline and performing separation; a chlorine gas passage pipe arranged at the top of the anode suspension separator, guiding the separated chlorine gas out; an outlet brine pipeline arranged at the bottom of the anode suspension separator, guiding the separated liquid out.

[0009] Preferably, the sampling recovery module comprises: an anode sampling recovery bucket connected with the electrolytic tank anode inlet pipeline, the electrolytic tank anode outlet pipeline, the drain tank and the waste chlorine gas balance pipe respectively, receiving chlorine-containing products from the electrolytic tank anode inlet pipeline and the electrolytic tank anode outlet pipeline, performing sampling detection, performing gas-liquid separation on the chlorine-containing products, and sending chlorine gas into the chlorine gas balance pipe; a drain pipe connected with the anode sampling recovery bucket at one end and connected with the drain tank at the other end, receiving liquid from the anode sampling recovery bucket and sending the liquid into the drain tank.

[0010] Preferably, the horizontal position of the gas end passage of the anode sampling recovery bucket connected with the chlorine gas balance pipe is higher than the passage of the anode sampling recovery bucket connected with the drain pipe.

[0011] Preferably, the sampling recovery module further comprises: a sampling bucket control ball valve arranged on the connecting passage of the anode sampling recovery bucket and the drain pipe, used for controlling flow rate; a sampling bucket one-way check valve arranged on the connecting passage of the anode sampling recovery bucket and the drain pipe and located downstream of the sampling bucket control ball valve, used for preventing liquid backflow.

[0012] Preferably, the sampling recovery module further comprises: an anode outlet sampling valve arranged on the passage of the anode sampling recovery bucket and the electrolytic tank anode outlet pipeline, used for controlling flow rate; an anode inlet sampling valve arranged on the passage of the anode sampling recovery bucket and the electrolytic tank anode inlet pipeline, used for controlling flow rate; a chlorine gas suction control valve arranged on the passage of the anode sampling recovery bucket and the waste chlorine gas balance pipe, used for controlling chlorine gas flow rate.

[0013] Preferably, the connecting passage of the anode sampling recovery bucket and the drain pipe adopts a U-shaped pipe.

[0014] Preferably, the electrolytic cell pipeline balance module comprises: a balance passage, one end of which is connected with the electrolytic cell anode outlet pipeline and the other end of which is connected with the electrolytic cell anode inlet pipeline; a first exhaust valve, a sight glass and a second exhaust valve, which are sequentially arranged on the balance passage along the flow direction of the electrolytic cell anode outlet pipeline to the electrolytic cell anode inlet pipeline; the first exhaust valve and the second exhaust valve are used for controlling the flow rate of the gas, and the sight glass is used for observing the internal condition.

[0015] Preferably, the sampling bucket control ball valve, the sampling bucket one-way check valve, the anode outlet sampling valve and the chlorine gas suction control valve are selected to be chlorine-resistant fluorine-lined ball valves.

[0016] In summary, compared with the prior art, the potassium base production electrolytic cell sampling brine and waste chlorine gas recycling safety device has the following beneficial effects:

[0017] First, the risk and waste problem in the process of taking brine samples from the anode side inlet and taking dilute brine samples from the anode outlet in the chlor-alkali production process are solved, the discharged brine is recycled to the anode discharge tank, and the brine in the discharge tank is re-salted for reuse.

[0018] Second, the generated waste chlorine gas is recycled to the waste chlorine system to produce secondary potassium, achieving pollution-free disposal. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A schematic view of the potassium base production electrolytic cell sampling brine and waste chlorine gas recycling safety device is provided.

[0020] REFERENCE NUMERALS:

[0021] 1-chlorine gas passage, 2-outlet dilute brine pipeline, 3-anode sampling recovery bucket, 4-sampling bucket control ball valve, 5-sampling bucket one-way check valve, 6-anode outlet sampling valve, 7-electrolytic cell anode inlet pipeline, 8-anode inlet sampling valve, 9-electrolytic cell anode outlet pipeline, 10-first exhaust valve, 11-sight glass, 12-second exhaust valve, 13-chlorine gas suction control valve, 14-waste chlorine gas balance pipe, 15-discharge tank, 16-discharge pipe, 17-anode suspension separator, 18-electrolytic cell. DETAILED DESCRIPTION

[0022] The technical solutions, structural features, achieved purposes and effects of the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the embodiments of the present application. Figure 1 The technical solutions, structural features, achieved purposes and effects of the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the embodiments of the present application.

[0023] 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 illustration of the embodiments of this utility model, and are not intended to limit the implementation conditions of this utility model. 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 this utility model, provided that they do not affect the effects and objectives that this utility model can produce.

[0024] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only the expressly listed elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0025] To address the risks and waste of chlorine during the anode-side brine sampling process at the inlet and outlet of the chlor-alkali production line; such as... Figure 1 As shown, this utility model proposes a safety device for sampling brine and recycling waste chlorine gas in a potassium alkali production electrolytic cell. The device is connected to the anode inlet pipeline 7 and the anode outlet pipeline 9 of the electrolytic cell, respectively. The anode inlet pipeline 7 and the anode outlet pipeline 9 of the electrolytic cell are respectively connected to the electrolytic cell 18.

[0026] The function of the anode inlet pipeline 7 in the electrolytic cell is primarily to transport the electrolyte containing the anode reactants to the anode region of the electrolytic cell. For example, in a chlor-alkali industrial electrolytic cell, the anode inlet pipeline transports a saturated brine solution to the anode chamber, providing chloride ions as reactants for the oxidation reaction occurring at the anode.

[0027] The function of the anode outlet pipeline 9 of the electrolytic cell is to discharge the products of the oxidation reaction on the anode and the unreacted electrolyte from the electrolytic cell. For example, in a chlor-alkali electrolytic cell, the anode outlet pipeline will discharge the generated chlorine gas and electrolyte containing a small amount of unreacted chloride ions, so that the products can be collected, separated and processed in the subsequent process. The chlorine gas can be liquefied to obtain liquid chlorine products.

[0028] Based on the above, the reuse safety device includes:

[0029] A chlorine separation module is connected to the anode outlet pipeline 9 of the electrolytic cell, receives chlorine-containing products from the anode outlet pipeline 9 of the electrolytic cell, and separates them.

[0030] a sampling recovery module connected with the electrolytic tank anode inlet pipeline 7 and the electrolytic tank anode outlet pipeline 9 respectively, receiving the chlorine-containing products from the electrolytic tank anode inlet pipeline 7 and the electrolytic tank anode outlet pipeline 9, and performing sampling detection and gas-liquid separation on the chlorine-containing products;

[0031] a discharge module connected with the sampling recovery module, receiving the products after gas-liquid separation from the sampling recovery module, and performing storage and transmission on the products;

[0032] an electrolytic tank pipeline balancing module connected with the electrolytic tank anode outlet pipeline 9 at one end and the electrolytic tank anode inlet pipeline 7 at the other end, balancing the gas pressure between the electrolytic tank anode inlet pipeline 7 and the electrolytic tank anode outlet pipeline 9.

[0033] Specifically, the discharge tank module comprises:

[0034] a discharge tank 15 connected with the sampling recovery module, receiving the liquid from the sampling recovery module;

[0035] a waste chlorine gas balancing pipe 14 arranged at the upper part of the discharge tank 15 and connected with the sampling recovery module, receiving the gas from the discharge tank 15 and the sampling recovery module, and performing secondary transmission on the gas. For example, the gas enters the secondary potassium system under the action of the negative pressure of the titanium fan, and finally reacts with the lye to produce potassium hypochlorite. The subsequent treatment is not limited here.

[0036] Specifically, the chlorine gas separation module comprises:

[0037] an anode suspension separator 17 connected with the electrolytic tank anode outlet pipeline 9, receiving the chlorine-containing products from the electrolytic tank anode outlet pipeline 9, and performing separation on the chlorine-containing products;

[0038] a chlorine gas passage pipe 1 arranged at the top of the anode suspension separator 17, guiding the separated chlorine gas out;

[0039] an outlet dilute brine pipeline 2 arranged at the bottom of the anode suspension separator 17, guiding the separated liquid out, which is generally dilute brine.

[0040] Specifically, the sampling recovery module comprises:

[0041] an anode sampling recovery bucket 3 connected with the electrolytic tank anode inlet pipeline 7, the electrolytic tank anode outlet pipeline 9, the discharge tank 15 and the waste chlorine gas balancing pipe 14 respectively, receiving the chlorine-containing products from the electrolytic tank anode inlet pipeline 7 and the electrolytic tank anode outlet pipeline 9, performing sampling detection on the chlorine-containing products, performing gas-liquid separation on the chlorine-containing products, and sending the chlorine gas into the chlorine gas balancing pipe 14;

[0042] a discharge pipe 16, one end of which is connected to the anode sampling recovery bucket 3 and the other end of which is connected to the discharge groove 15, receiving the liquid from the anode sampling recovery bucket 3 and sending it into the discharge groove 15;

[0043] It should be noted here that the horizontal position of the gas end passage of the anode sampling recovery bucket 3 connected to the chlorine gas balance pipe 14 is higher than the passage of the anode sampling recovery bucket 3 connected to the discharge pipe 16, so that the chlorine gas can smoothly enter the discharge groove 15.

[0044] In the preferred embodiment, the sampling recovery module further comprises:

[0045] a sampling bucket control ball valve 4 arranged on the connecting passage of the anode sampling recovery bucket 3 and the discharge pipe 16 for controlling the flow rate;

[0046] a sampling bucket one-way check valve 5 arranged on the connecting passage of the anode sampling recovery bucket 3 and the discharge pipe 16 and located downstream of the sampling bucket control ball valve 4 for preventing backflow of the liquid.

[0047] In the preferred embodiment, the sampling recovery module further comprises:

[0048] an anode outlet sampling valve 6 arranged on the passage of the anode sampling recovery bucket 3 and the electrolytic tank anode outlet pipeline 9 for controlling the flow rate;

[0049] an anode inlet sampling valve 8 arranged on the passage of the anode sampling recovery bucket 3 and the electrolytic tank anode inlet pipeline 7 for controlling the flow rate;

[0050] a chlorine gas suction control valve 13 arranged on the passage of the anode sampling recovery bucket 3 and the waste chlorine gas balance pipe 14 for controlling the chlorine gas flow rate.

[0051] In addition, in order to further prevent backflow, the connecting passage of the anode sampling recovery bucket 3 and the discharge pipe 16 is designed in a U-shaped pipe, further ensuring the safety of the device operation; generally, the height of the U-shaped pipe is about 3500 mm or more.

[0052] Specifically, the electrolytic tank pipeline balance module comprises:

[0053] a balance passage, one end of which is connected to the electrolytic tank anode outlet pipeline 9 and the other end of which is connected to the electrolytic tank anode inlet pipeline 7;

[0054] a first exhaust valve 10, a sight glass 11 and a second exhaust valve 12, which are arranged on the balance passage in sequence along the flow direction of the electrolytic tank anode outlet pipeline 9 to the electrolytic tank anode inlet pipeline 7; the first exhaust valve 10 and the second exhaust valve 12 are used for controlling the flow rate of the gas, and the sight glass 11 is used for observing the internal condition.

[0055] In the preferred embodiment, the material of the whole system is titanium, and the material of the sampling barrel control ball valve 4, the sampling barrel check valve 5, the anode outlet sampling valve 6 and the chlorine gas suction control valve 13 is fluorine-resistant.

[0056] Although the content of the present application has been described in detail by the above preferred embodiment, 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 substitutions of the present application will be obvious to those skilled in the art. Therefore, the protection scope of the present application should be defined by the appended claims.

Claims

1. A safety device for recycling of sample brine and waste chlorine gas from a potash production electrolyzer, characterized in that, The device is connected with the electrolytic cell anode inlet pipeline (7) and the electrolytic cell anode outlet pipeline (9) respectively; The electrolytic cell anode inlet pipeline (7) and the electrolytic cell anode outlet pipeline (9) are connected with the electrolytic cell (18) respectively; The recycling safety device comprises: A chlorine separation module is connected with the electrolytic cell anode outlet pipeline (9), receives the chlorine-containing product from the electrolytic cell anode outlet pipeline (9), and separates the chlorine-containing product; A sampling recovery module is connected with the electrolytic cell anode inlet pipeline (7) and the electrolytic cell anode outlet pipeline (9) respectively, receives the chlorine-containing product from the electrolytic cell anode inlet pipeline (7) and the electrolytic cell anode outlet pipeline (9), and carries out sampling detection and gas-liquid separation on the chlorine-containing product; A discharge module is connected with the sampling recovery module, receives the gas-liquid separated product from the sampling recovery module, and stores and transmits the product; An electrolytic cell pipeline balance module is connected with the electrolytic cell anode outlet pipeline (9) at one end and connected with the electrolytic cell anode inlet pipeline (7) at the other end, and balances the gas pressure between the electrolytic cell anode inlet pipeline (7) and the electrolytic cell anode outlet pipeline (9).

2. The potassium base production electrolytic cell sampling brine and waste chlorine recycling safety device according to claim 1, wherein The discharge tank module comprises a discharge tank (15) connected with the sampling recovery module and receiving the liquid from the sampling recovery module; A waste chlorine balance pipe (14) is arranged on the upper part of the discharge tank (15) and connected with the sampling recovery module, receives the gas from the discharge tank (15) and the sampling recovery module, and carries out secondary transmission on the gas.

3. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 2, characterized in that, The chlorine separation module comprises: An anode suspension separator (17) is connected with the electrolytic cell anode outlet pipeline (9), receives the chlorine-containing product from the electrolytic cell anode outlet pipeline (9), and separates the chlorine-containing product; A chlorine pipe (1) is arranged on the top of the anode suspension separator (17) and leads out the separated chlorine; An outlet dilute brine pipeline (2) is arranged on the bottom of the anode suspension separator (17) and leads out the separated liquid.

4. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 3, characterized in that, The sampling recovery module comprises: An anode sampling recovery bucket (3) is connected with the electrolytic cell anode inlet pipeline (7), the electrolytic cell anode outlet pipeline (9), the discharge tank (15) and the waste chlorine balance pipe (14) respectively, receives the chlorine-containing product from the electrolytic cell anode inlet pipeline (7) and the electrolytic cell anode outlet pipeline (9), carries out sampling detection on the chlorine-containing product, carries out gas-liquid separation on the chlorine-containing product, and sends the chlorine into the chlorine balance pipe (14); A discharge pipe (16) is connected with the anode sampling recovery bucket (3) at one end and connected with the discharge tank (15) at the other end, receives the liquid from the anode sampling recovery bucket (3), and sends the liquid into the discharge tank (15).

5. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 4, characterized in that, The horizontal position of the gas end passage of the anode sampling recovery bucket (3) connected with the chlorine balance pipe (14) is higher than the passage of the anode sampling recovery bucket (3) connected with the discharge pipe (16).

6. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 5, characterized in that, The sampling recovery module further comprises: A sampling bucket control ball valve (4) is arranged on the connecting passage of the anode sampling recovery bucket (3) and the discharge pipe (16) to control the flow rate. A sampling bucket one-way check valve (5) is arranged on the connecting passage of the anode sampling recovery bucket (3) and the discharge pipe (16) and is located downstream of the sampling bucket control ball valve (4) to prevent backflow of liquid.

7. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 6, characterized in that, The sampling recovery module further comprises: An anode outlet sampling valve (6) is arranged on the passage of the anode sampling recovery bucket (3) and the electrolytic cell anode outlet pipeline (9) to control the flow rate. An anode inlet sampling valve (8) is arranged on the passage of the anode sampling recovery bucket (3) and the electrolytic cell anode inlet pipeline (7) to control the flow rate. A chlorine gas suction control valve (13) is arranged on the passage of the anode sampling recovery bucket (3) and the waste chlorine gas balance pipe (14) to control the chlorine gas flow rate.

8. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 7, characterized in that, The connecting passage of the anode sampling recovery bucket (3) and the discharge pipe (16) adopts a U-shaped pipe.

9. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 8, characterized in that, The electrolytic cell pipeline balance module comprises: A balance passage is connected at one end to the electrolytic cell anode outlet pipeline (9) and at the other end to the electrolytic cell anode inlet pipeline (7); A first exhaust valve (10), a sight glass (11) and a second exhaust valve (12) are arranged in sequence on the balance passage along the flow direction of the electrolytic cell anode outlet pipeline (9) to the electrolytic cell anode inlet pipeline (7). The first exhaust valve (10) and the second exhaust valve (12) are used to control the flow rate of gas, and the sight glass (11) is used to observe the internal condition.

10. The safety device for sampling brine and recycling waste chlorine gas of a potassium-alkali production electrolytic cell according to claim 9, characterized in that, The sampling bucket control ball valve (4), the sampling bucket one-way check valve (5), the anode outlet sampling valve (6) and the chlorine gas suction control valve (13) select chlorine-resistant fluorine-lined ball valves.

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